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GE Digital Energy

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Instruction manualMultilin DGCV Revision: 1.10

Manual P/N: 1601-0259-A1

GE publication code: GEK-113577

Copyright © 2011 GE Digital Energy

*1601-0259-A1*

The Multilin DGCVVoltage Regulator Controller

http://www.GEmultilin.com

© 2011 GE Digital Energy Incorporated. All rights reserved.

Multilin DGCV Voltage Regulator Controller instruction manual for revision 1.10.

Multilin DGCV Voltage Regulator Controller, EnerVista, EnerVista Launchpad, and EnerVista DGCV Setup are registered trademarks of GE Digital Energy Inc.

The contents of this manual are the property of GE Digital Energy Inc. This documentation is furnished on license and may not be reproduced in whole or in part without the permission of GE Digital Energy. The content of this manual is for informational use only and is subject to change without notice.

Part number: 1601-0259-A1 (July 2011)

MULTILIN DGCV VOLTAGE REGULATOR CONTROLLER – INSTRUCTION MANUAL TOC–I

Table of Contents

1.INTRODUCTION Overview ................................................................................................................................1 - 1Cautions and warnings ...................................................................................................1 - 4DGC control functions......................................................................................................1 - 5

Basic control functions ..........................................................................................................1 - 5Supplementary control functions .....................................................................................1 - 6Inhibit functions ........................................................................................................................1 - 6

Multilin DGCV order codes .............................................................................................1 - 8Specifications.......................................................................................................................1 - 9

Inputs .............................................................................................................................................1 - 9Outputs..........................................................................................................................................1 - 10Power supply ..............................................................................................................................1 - 10Communications ......................................................................................................................1 - 10Testing and Certification.......................................................................................................1 - 10Environmental............................................................................................................................1 - 12

2.INSTALLATION Mechanical installation ...................................................................................................2 - 1Electrical installation ........................................................................................................2 - 2

3.INTERFACES Front control panel interface........................................................................................3 - 1Working with the Keypad .....................................................................................................3 - 7LED status indicators..............................................................................................................3 - 9

Software setup ....................................................................................................................3 - 10EnerVista Multilin DGCV Setup Software .......................................................................3 - 10Connecting EnerVista DGCV Setup to the device......................................................3 - 13Working with settings and settings files........................................................................3 - 16Upgrading Multilin DGCV firmware..................................................................................3 - 23Advanced EnerVista DGCV Setup features ..................................................................3 - 24

4.ACTUAL VALUES A1 Status ................................................................................................................................4 - 2Clock ...............................................................................................................................................4 - 3Contact inputs ...........................................................................................................................4 - 3Output relays..............................................................................................................................4 - 3Virtual inputs...............................................................................................................................4 - 4Virtual outputs ...........................................................................................................................4 - 4Contact inputs summary ......................................................................................................4 - 4Output relays summary ........................................................................................................4 - 4Flexlogic summary...................................................................................................................4 - 5Tap position.................................................................................................................................4 - 5Active group................................................................................................................................4 - 5

A2 Metering...........................................................................................................................4 - 6Current...........................................................................................................................................4 - 8Voltage ..........................................................................................................................................4 - 8Power .............................................................................................................................................4 - 9Frequency ....................................................................................................................................4 - 10Total Harmonic Distortion (THD)........................................................................................4 - 10Harmonics ...................................................................................................................................4 - 11Default screens .........................................................................................................................4 - 13Power calculation.....................................................................................................................4 - 13

A3 Records ............................................................................................................................4 - 15

TOC–II MULTILIN DGCV VOLTAGE REGULATOR CONTROLLER – INSTRUCTION MANUAL

Event records.............................................................................................................................4 - 15Data logger .................................................................................................................................4 - 16

A4 Target messages.........................................................................................................4 - 18Multilin DGCV configuration errors ..................................................................................4 - 18

5.SETTINGS S1 Product setup................................................................................................................5 - 1Clock...............................................................................................................................................5 - 3Password security ...................................................................................................................5 - 4Communications......................................................................................................................5 - 5Event recorder...........................................................................................................................5 - 13Datalogger ..................................................................................................................................5 - 14Front panel..................................................................................................................................5 - 15Installation...................................................................................................................................5 - 15

S2 System setup.................................................................................................................5 - 16Current sensing.........................................................................................................................5 - 17Voltage sensing ........................................................................................................................5 - 17Power system ............................................................................................................................5 - 18Tap changer ...............................................................................................................................5 - 18Tap sensing.................................................................................................................................5 - 19

S3 Voltage regulator ........................................................................................................5 - 24Main regulation.........................................................................................................................5 - 28Runback limits ...........................................................................................................................5 - 30Voltage reduction ....................................................................................................................5 - 31Power override ..........................................................................................................................5 - 32Inhibit functions ........................................................................................................................5 - 33Tap Changer control logic ...................................................................................................5 - 34

S4 Controls............................................................................................................................5 - 38Change settings group.......................................................................................................... 5 - 39Modes of VR operation .......................................................................................................... 5 - 40FlexLogic™ ..................................................................................................................................5 - 44

S5 Inputs/Outputs .............................................................................................................5 - 49Contact inputs ...........................................................................................................................5 - 49Output relays .............................................................................................................................5 - 50Virtual inputs ..............................................................................................................................5 - 51

6.COMMANDS

7.MAINTENANCE M1 Product information..................................................................................................7 - 2M3 Statistics .........................................................................................................................7 - 3

MULTILIN DGCV VOLTAGE REGULATOR CONTROLLER – INSTRUCTION MANUAL 1–1

Multilin DGCV Voltage Regulator Controller

Chapter 1: Introduction

Digital Energy

Introduction

Overview

Multilin DGCV applicationThe Distribution Grid Controller - Voltage Regulator (Multilin DGCV ) is a voltage regulating device intended for the regulation of the power transformer secondary (load) voltage within user-specified limits. The Multilin DGCV performs this regulation by sending either a Raise or a Lower tap command to the transformer on-load tap changer. In return, the tap changer device switches the tap of the transformer secondary winding to a higher or lower tap number, and effectively changes the transformer primary-to-secondary voltage ratio. Multilin DGCV description of operationThe Multilin DGCV can be connected to measure either phase-to-ground, or phase-to-phase, single voltage input, or three-phase voltages. The device can also be connected to either single phase current input, or three phase currents. When the Multilin DGCV is to be used with single-phase current and voltage inputs, it is highly recommended that these inputs be taken from the CT and PT mounted on the same phase. Based on the programmed required voltage level and the entered line drop compensation (LDC), the Multilin DGCV calculates the control voltage and compares it with the measured secondary voltage. When the voltage difference becomes bigger than the calculated limit, the controller in one case sends a raise, and in other case, a lower, tap command. The raising or the lowering of the tap is not an instantaneous action. The Multilin DGCV will not send a raise or lower tap command to the tap changer if the measured voltage fluctuates within the user-specified voltage bandwidth. When the measured voltage exceeds either the lower or higher bandwidth level, the Multilin DGCV starts the user-programmed computation delay timer. If during that time-out period, the measured voltage falls back to within the voltage bandwidth, the timer resets and the raise or lower tap change command is not initiated. The tap change command will be initiated after the computation delay time expires. Please note that upon a successful tap change, the measured voltage may still be outside the voltage bandwidth. If the voltage is still “out of band,” the voltage regulator will issue another tap change command either after applying

1–2 MULTILIN DGCV VOLTAGE REGULATOR CONTROLLER – INSTRUCTION MANUAL

OVERVIEW CHAPTER 1: INTRODUCTION

a computation time delay, or without a time delay. Applying or not applying a computation time delay before each tap change command will depend on the selected regulation mode: sequential, or non-sequential. In Sequential mode, the computation time delay is timed-out only for the first tap change. With the voltage still “out of band”, the Multilin DGCV continues to change the tap until the voltage is brought back into the band without applying a computation time delay.In Non-sequential mode, each raise or lower tap command is issued after the computation time delay times out and a successful tap change is made. The regulator increases one tap in each stage until the voltage is again within limits.In both modes the Multilin DGCV applies a user-programmed tap changer delay to allow time for the physical tap change completion, and to sense whether the measured voltage has changed.

Figure 1: Multilin DGCV control application

CHAPTER 1: INTRODUCTION OVERVIEW


Multilin DGCV Features

• Single or three phase voltage and currents measurements

• Stable transformer secondary voltage regardless the loading conditions

• Voltage level, voltage bandwidth, Line Drop Compensation (LDC)

• Voltage runback limits

• Three levels of voltage reduction

• Reverse power detection and power override modes

• Under-voltage, over-voltage and over-current inhibits

• Tap change incomplete sequence detection

• Unsuccessful tap change detection

• Auto/Remote and Manual control

• Easy control both through faceplate and remotely

• Data monitoring and control over radio communication via Modbus or DNP addressing.


CAUTIONS AND WARNINGS CHAPTER 1: INTRODUCTION

Cautions and warnings

Before attempting to install or use this device, it is imperative that all caution and danger indicators in this manual are reviewed to help prevent personal injury, equipment damage, or downtime. The following icons are used to indicate notes, cautions, and dangers.

Figure 2: Note icons used in the documentation

The standard note icon emphasizes a specific point or indicates minor problems that may occur if instructions are not properly followed.The caution icon indicates that possible damage to equipment or data may occur if instructions are not properly followed.The danger icon provides users with a warning about the possibility of serious or fatal injury to themselves or others.

NOTE CAUTION DANGER

CHAPTER 1: INTRODUCTION MULTILIN DGCV CONTROL FUNCTIONS


Multilin DGCV control functions

Basic control functionsVoltage Regulator basic control includes settings used for most installations:Voltage Level (Bandcenter)The Voltage Level is programmable on the Multilin DGCV to define the desired level of voltage to be held at the load side of the power transformer. The actual load is usually away from the transformer, in which case the electrical distance to the load is defined by the line drop compensation (LDC) settings. In many cases this voltage level is set to 120 V secondary value, that corresponds to the desired primary voltage from the transformer load side. It is commonly required that the voltage at the load be held in the range of 114 V to 126 V, although the voltage level setting range provides selecting an even higher voltage difference.Voltage BandwidthDue to the variations in the loads connected to the transformer, its output voltage also varies. Two criteria apply to this fluctuation:

1. Acceptable voltage fluctuation levels when the voltage level stays within the selected voltage bandwidth

2. Unacceptable voltage levels – voltages outside the bandwidth voltage thresholds, and emergency voltage levels much higher, or much lower than the bandwidth voltage thresholds.

Usually the magnitude of the voltage bandwidth half is considered to be twice the voltage change per the LTC step change, or 1.5 V volts in the common system. In fact the most common bandwidth settings for tight voltage regulation are 2.0, 2.5 and 3.0 volts. Time Delay (Computation Time Delay)The Multilin DGCV includes a time delay known as Computation Time delay that is used to delay operation of the tap changer, should the excursion of the measured voltage outside of the bandwidth be of short duration. An example of a short voltage dip can be the starting of a motor connected to the bus supplied by the transformer, where the tap changer should not raise the tap for that start period. The time delay is usually set to tens of seconds, and even as much as a few minutes, depending on the situation.Line Drop Compensation (LDC)Very often the regulators are installed far from the loads, and the voltage levels measured at the transformer output, at the loads, or at the theoretical load center, are very different. The greater the distance, the greater the voltage difference between the transformer output voltage and the voltage at the load point, with the latter being smaller. To supply the required voltage at the load center point, the tap changer needs to raise the voltage at the transformer side to a much higher level. To avoid such tap changer action, the Line Drop Compensation is calculated by the Voltage Regulator and applied to the computation of the desired control voltage. The LDC settings define the resistive drop compensation and the inductive drop compensation expressed in volts. The value to be set on the control is the voltage drop on the line when the line is carrying CT rated primary current.

- power factor angle

V line drop

Vb

VI

IR

IX

I

VI = Vb - V line drop

Ø


MULTILIN DGCV CONTROL FUNCTIONS CHAPTER 1: INTRODUCTION

Vl – voltage at the load pointVb – bus voltage IR – voltage drop due to line resistanceIX – voltage drop due to line inductance

Supplementary control functionsVOLTAGE OVERRIDE FUNCTIONSHigh and Low Voltage Runback LimitsWhen set, the VR applies additional bandwidth to the Voltage Level setting. The purpose of this function is to avoid voltage hunting if the measured voltage changes to either a very low, or a very high, level. If the Voltage Level exceeds the runback limits, the voltage regulator will immediately call for an automatic raising or lowering of the tap without any time delay. The lower (raise) tap command will continue until the voltage falls to within the voltage runback deadband. This function is used in cases where under normal operations, heavy loads on the system with line drop compensation may result in excessive high voltage levels to which the first users fed by that transformer are subjected.Voltage ReductionThis function can be used in cases where system-wide voltage reduction is imposed in order to reduce demand at critical periods. Sometimes a small voltage “boost” from a tapped autotransformer at the voltage sensing side, can “fool” the AVR that would in return issue a command to the transformer tap changer to lower the output voltage. These voltage “boosts” are in steps of typically 2.5, 5.0, and 7.5 percent. To avoid issuing a command for lowering the voltage, the AVR provides an automatic voltage reduction function. This function uses three digital inputs, each of which, if activated, will reduce the voltage limit setpoint by the programmed percentage.Reverse PowerNormally the Multilin DGCV is connected to CT and VT on the secondary side of the transformer in order to sense forward power. However, should the power change its direction, the regulator will detect it and apply control according to the programmed reverse power settings. If IGNORE mode is selected, the detection of reverse power does not result in any action. When BLOCK mode is selected, the regulator will be blocked from issuing raise (lower) tap changer commands, until the detected reverse power goes below the programmed pickup level. Another selection, RETURN TO NORMAL, would lead to changing the tap position to the neutral tap, and if REGULATE mode is selected, the detection of reverse power reverses the Raise/Lower operations.

Inhibit functionsOver- Current InhibitOver-current inhibit is applied to the VR control to prevent the tap changer from raising or lowering the tap position, preventing tap contact wear in periods of severe overloading or low level faults. Over-Voltage InhibitIn some cases, over-voltage inhibiting is applied to prevent further tap-raising action due to load increase, which would, in turn, demand higher voltage at the transformer side. When the measured voltage at the transformer output goes above the over-voltage inhibit threshold, the tap changer stops raising the tap. Under-Voltage InhibitUnder-voltage inhibit is applied to prevent further tap-lowering and raising actions, in order to limit low customer voltage to safe limits, and block further voltage reduction action that could cause motor stalling and other undesirable low voltage effects.The undervoltage blocking is applied to prevent tap change operation during a system breakdown; to avoid the tap changer mechanism from being driven to the last tap.

CHAPTER 1: INTRODUCTION MULTILIN DGCV CONTROL FUNCTIONS


Tap changer voltage control levels are depicted in the following diagram:

Figure 3: Voltage Regulation Control Levels and Inhibits

Balanced VoltageIf the voltage level is maintained within the selected voltage bandwidth levels [(b) in the above figure], no raise or lower tap command is issued.Normal Tap Lower/Raise intervalWithin this band, if the VR is in auto mode, once the voltage is out of any of the bandwith limits [(b) in the above figure] a counter is initiated. When the counter times out, a lower or raise tap command is issued.Fast Tap Lower/Raise intervalWhen the Voltage Level exceeds any of the voltage runback limits [(b) in the above figure], the Voltage Regulator is required to perform an immediate action. A quick raise/lower tap without time delay is issued. The Runback limits are programmed with respect to the computed voltage at the load side. The OV & UV limits [(a) in the above figure] are applied directly to the measured voltage at the transformer output side. The OV limit inhibits any possible raising of the tap. The auto lower tap commands are allowed. The UV limit, inhibits automatic control until the measured voltage is again above this threshold.


MULTILIN DGCV ORDER CODES CHAPTER 1: INTRODUCTION

Multilin DGCV order codes

Figure 4: Order Codes

CHAPTER 1: INTRODUCTION SPECIFICATIONS


Specifications

InputsVOLTAGE INPUTSVoltage Level:........................................................60 to 300 VFrequency:..............................................................50 or 60 HzAccuracy: ................................................................±0.5%of NominalVT Secondary Range: ........................................60.0 to 440.0 VVT Ratio: ..................................................................1.0 to 300.0 VVT Calibration: ......................................................0.950 to 1.050

CURRENT INPUTS (IO_A MODULE)Nominal Current:.................................................1 A, 5 ARange: ......................................................................0.2 to 2.5 x CTFrequency:..............................................................50 or 60 HzAccuracy: ................................................................±0.5% from 0.5 to 1.5 x CTCurrent Withstand:.............................................Continuous: 3 x CT rated

CURRENT INPUTS (IO_H MODULE)Nominal Current:.................................................0.2 ARange: ......................................................................0.05 to 0.5 AFrequency:..............................................................50 or 60 HzAccuracy: ................................................................±0.5%of NominalCurrent Withstand:.............................................Continuous: 2.5 x Nominal

COMPUTATIONAL TIME DELAYRange: ......................................................................0.0 to 300.0 s in steps of 0.1 sAccuracy: ................................................................100 ms or ±0.5% @ (0.0 to 20.0 s)

up to 1% @ (20.0 to 300.0 s)

TAP CHANGER TIME DELAYRange: ......................................................................0.0 to 300.0 s in steps of 0.1 sAccuracy: ................................................................up to ±0.5%

REVERSE POWER DELAYRange: ......................................................................0.0 to 3600.0 s in steps of 0.1 sAccuracy: ................................................................up to ±0.2%

PHASE OC, OV, AND UV TIME DELAYSRange: ......................................................................0.0 to 600.0 s in steps of 0.1 sAccuracy: ................................................................up to ±0.3%

DIGITAL INPUTS (IO_C MODULE)Fixed Pickup: .........................................................65 V ACRecognition Time:...............................................2 cyclesCurrent Draw @ Rated Voltage:...................75 mA @ 120 V AC for 200 μs every cycle

60 mA @ 240 V AC for 800 μs every cycleInput Impedance:................................................1.7 kOhmsType:..........................................................................opto-isolated inputsExternal Switch: ...................................................wet contactMaximum Input Voltage: .................................300 V AC

DIGITAL INPUTS (IO_E MODULE)Fixed Pickup: .........................................................20 V DCRecognition Time:...............................................2 cyclesCurrent Draw @ Rated Voltage:...................7 mA @ 24 V DC

14 mA @ 48 V DCInput Impedance:................................................1.23 kOhmsType:..........................................................................opto-isolated inputsExternal Switch: ...................................................wet contact


SPECIFICATIONS CHAPTER 1: INTRODUCTION

OutputsOUTPUT RELAYSConfiguration: ...................................................... electromechanical form A (IO_C) and form C (IO_D)Contact Material: ................................................ silver alloyOperate Time: ......................................................10 msMinimum Contact Load:..................................10 mA @ 5 V DCContinuous Current: ..........................................10 AMake and Carry for 0.2 s: ................................30 A per ANSI C37.90Mechanical Life: ..................................................10 000 000 operations

RAISE/LOWER FORM A OUTPUT RELAYSAC Resistive, 120 V AC: .....................................10 AAC Resistive, 240 V AC: .....................................10 AAC Inductive, PF = 0.4 pilot duty: .................2 ADC Resistive, 30 V DC: .......................................10 A

FORM C OUTPUT CONTACTSAC Resistive, 120 V AC: .....................................10 A normally open, 5 A normally closedAC Resistive, 240 V AC: .....................................10 A normally open, 8 A normally closedAC Inductive, PF = 0.4 pilot duty: .................2.5 ADC Resistive, 30 V DC: .......................................10 A

Power supplyPOWER SUPPLYNominal:..................................................................120 to 240 V AC

125 to 250 V DCRange: ......................................................................60 to 300 V AC (50 and 60 Hz)

84 to 250 V DCRide Through: .......................................................35 msVoltage Withstand: ............................................2 x highest nominal voltage for 10 msPower Consumption:.........................................16 W typical, 25 W maximum

CommunicationsCOMMUNICATIONSTransmission Mode: .......................................... radio (optional)Communication Protocols:.............................DNP 3, Modbus

Testing and Certification

APPROVALS

Applicable Council Directive According to

CE compliance Low voltage directive EN60255-5 / EN60255-27

EMC Directive EN61000-6-2 / 6-4

ISO Manufactured under a registered quality program

ISO9001

CHAPTER 1: INTRODUCTION SPECIFICATIONS


TYPE TESTS

Test Reference Standard Test Level

Dielectric Voltage Withstand EN60255-5 2.3KV

Impulse Voltage Withstand EN60255-5 5KV

Insulation Resistance Test EN60255-5 500 VDC

Damped Oscillatory IEC61000-4-18IEC60255-22-1 2.5KV CM, 1KV DM

Electrostatic Discharge EN61000-4-2/IEC60255-22-2 Level 4

RF Immunity EN61000-4-3/IEC60255-22-3 Level 3

Fast Transient Disturbance EN61000-4-4/IEC60255-22-4 Class A and B

Surge Immunity EN61000-4-5/IEC60255-22-5 Level 3 & 4

Conducted RF Immunity EN61000-4-6/IEC60255-22-6 Level 3

Radiated & Conducted Emissions CISPR11 /CISPR22/ IEC60255-25 Class A

Sinusoidal Vibration IEC60255-21-1 Class 1

Shock & Bump IEC60255-21-2 Class 1

Siesmic IEC60255-21-3 Class 2

Power Magnetic Immunity IEC61000-4-8 Level 5

Voltage Dip & interruption IEC61000-4-11 0, 40, 70, 80% dips, 250/300 cycle interrupts

Environmental (Cold) IEC60068-2-1 -20C 16 hrs

Environmental (Cold Storage) IEC60068-2-1 -40C 16 hrs

Environmental (Dry heat) IEC60068-2-2 85C 16hrs

Relative Humidity Cyclic IEC60068-2-30 6day variant 2

RF Immunity IEEE/ANSIC37.90.2 20V/m 80-1Ghz


SPECIFICATIONS CHAPTER 1: INTRODUCTION

Environmental

ENVIRONMENTAL SPECIFICATIONS

Ambient temperatures:

Storage/shipping: - 40oC to 90oC *

Operating: -40oC to 60oC *

* 1" around Base Unit

Humidity: Operating up to 95% (non condensing) @ 55oC (As per IEC60068-2-30 Variant 2, 6days)

Altitude: 2000m (max)

Overvoltage Category: II

Ingress Protection: IP20 (Base Unit) IP54 (Control Panel)

Environmental rating: 60oC surrounding air

Pollution Degree: II

Type 1 (panel mount versions only)



Chapter 2: Installation

Digital Energy

Installation

Mechanical installation

Figure 1: Multilin DGCV dimensions


ELECTRICAL INSTALLATION CHAPTER 2: INSTALLATION

Electrical installation

Figure 2: Multilin DGCV Voltage Regulator Controller wiring diagram - 3 CT Wye / 2 PTs OpDelta

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CHAPTER 2: INSTALLATION ELECTRICAL INSTALLATION


Figure 3: Multilin DGCV Voltage Regulator Controller wiring diagram - 3 CT Wye / 3 PTs Wye

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Figure 4: Multilin DGCV Voltage Regulator Controller wiring diagram - 1 CT ph-g / 1 PT ph-ph

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CHAPTER 2: INSTALLATION ELECTRICAL INSTALLATION


Figure 5: Multilin DGCV Voltage Regulator Controller wiring diagram - 1 CT ph-g / 1 PT ph-g

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Figure 6: Multilin DGCV Voltage Regulator Controller wiring diagram - 1 CT ph-g / 1 PT ph-g - for 1-phase Voltage Regulator

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Chapter 3: Interfaces

Digital Energy

Interfaces

Front control panel interface

The Multilin DGCV Voltage Regulator front panel provides easy navigation using full keypad pushbuttons, conveniently located tap changer control pushbuttons, quick access to setpoints, regulation transparency using LED indicators, and a 4 x 20 character Liquid Crystal Display. The front panel includes the following components:


FRONT CONTROL PANEL INTERFACE CHAPTER 3: INTERFACES

Figure 1: Multilin DGCV Front Panel

CHAPTER 3: INTERFACES FRONT CONTROL PANEL INTERFACE


Multilin DGCV STATUS LEDs: Three LEDs indicating the Multilin DGCV status: “In-Service”, “Alarm”, and (communications) “Comms OK” are placed in the upper left corner of the Multilin DGCV front panel.

VOLTAGE REGULATION LEDs

4 X 20 CHARACTER LCDThe Multilin DGCV has an LCD with 4 lines of 20 characters, that allows visibility under varied lighting conditions. When the keypad and the display are not being used, system information is displayed after a user-defined period of inactivity. Pressing the keypad when the screen shows the default display returns the display to the last available message before the default screen activated. Any VR control actions, as well as element operations, are displayed automatically, overriding any target message displayed at that time. The display and the navigation keypad are conveniently located to provide the user easy access to any settings, actual values, status, monitoring tools, or statistics. QUICK SETPOINTS PUSHBUTTONSThe Multilin DGCV is equipped with 6 pushbuttons for quick access to variety of settings. Pressing any of these pushbuttons invokes a settings menu on the display, that corresponds to the feature specified on the pushbutton. For the user’s convenience, some pushbuttons are equipped with LEDs that show whether or not the feature specified on the

IN SERVICE: The Multilin DGCV is operational and functioning properly when the “In-Service” LED shows green. The LED turns off upon detection of an internal firmware or hardware error. The product is not programmed when shipped, and the “In-Service” LED will not light upon power up. The LED will turn on green upon selecting the “Ready” setting under the S1 INSTALLATION/PRODUCT STATUS menu.

ALARM: The “Alarm” LED turns orange upon detection of either an internal firmware error, a hardware error, or upon ALARM conditions driven by the control of the tap changer such as “Unsuccessful Tap Change,” or “Incomplete Tap Sequence”.

COMMS OK: The communications LED, is a bi-colour LED, meaning that it will show green when the transmit/receive channels are set and the VR is communicating with another smart device or SCADA. This LED will turn orange if the communication channels – communication card failure, or communication channels - are not working properly.

NEUTRAL POSITION: The “Neutral Position” LED turns green when the tap changer moves the lead to the neutral tap of the tapped winding.

IN BAND: The “IN BAND” LED turns green when the measured voltage is within the programmed voltage bandwith.

HIGH (LOW) BAND: The “HIGH BAND” or the “LOW BAND” LED turns orange if the measured load voltage is “out of band,” such as being above the programmed high band voltage level, or below the programmed low band voltage, respectively.

HIGH (LOW) VOLTAGE LIMIT:

The “HIGH VOLTAGE LIMIT” and “LOW VOLTAGE LIMIT” LEDs turn orange, when the measured load voltage is either above or below the user programmed voltage runback limits, respectively, and VOLT RUNBACK LIMITS setpoint is enabled. Upon such conditions, the voltage regulator issues a tap change command to the tap changer without any time delay.

VOLTAGE REDUCTION: This LED shows orange when any of the three voltage reduction stages has been activated.

AUTO INHIBIT: This LED shows orange, when any of the inhibiting elements has been activated upon triggering any of its programmed settings.

REVERSE POWER: Тhe “REVERSE POWER” LED turns orange when the Voltage Regulator detects reverse power in excess of the programmed reverse power setting for the specified time delay.



pushbutton is enabled. "Quick Access" pushbuttons like “VOLTAGE LEVEL,” “BANDWITH,” and “LDC” are not equipped with LEDs, as the features implied by the pushbutton names are considered as being the base for the voltage regulation.

NOTE

NOTE: Pressing any of the Quick Setpoints pushbuttons, invokes only the settings programmed in the active Setpoint Group. Accessing and editing of settings from the other Setpoint Groups can be done using the navigation keypad pushbuttons.

VOLTAGE LEVEL: Pressing this pushbutton invokes the S3 MAIN REGULATION menu displaying the voltage level setting. Navigating through the settings from the menu is performed when pressing “UP”, “DOWN” keys from the navigation keypad.

BANDWIDTH: Pressing this pushbutton invokes the S3 MAIN REGULATION menu displaying the voltage bandwidth setting. Navigating through the settings from the menu is performed when pressing “UP”, “DOWN” keys from the navigation keypad.

LDC: Pressing the “LDC" pushbutton invokes the S3 MAIN REGULATION menu displaying the voltage corresponding to the programmed resistive line drop compensation “LDC RESISTIVE R” setting. Navigating through the menu by pressing the “DOWN” pushbutton from the keypad, displays the programmed inductive line drop compensation setting.

RUNBACK VOLTAGE LIMIT:

Pressing the “RUNBACK VOLTAGE LIMIT” pushbutton invokes the “S3 VOLT RUNBCK LIMIT” menu displaying the Enabled/Disabled setting of the element. Navigating through the settings from the menu is performed when pressing “UP”, “DOWN” keys from the navigation keypad. The corresponding LED will turn orange, when the voltage runback limits function is enabled.



TAP CHANGER CONTROL PANELThe tap changer control panel includes the following pushbuttons:

Figure 2: Tap Changer Control Panel

VOLTAGE REDUCTION:

Pressing the “VOLTAGE REDUCTION” pushbutton invokes the “S3 VOLTAGE REDUCTION” menu displaying the first setting – “VOLT REDUCTION 1”. Navigating through the menu is done by pressing the “UP”/ “DOWN” pushbutton from the keypad. The LED placed on the right of this pushbutton will turn orange, when the setting for any of the voltage reduction steps is set to value different than “Off”.

REVERSE POWER: Pressing the “REVERSE POWER” pushbutton invokes the “S3 POWER OVERRIDE” menu displaying the first setting from the menu. Navigating through the settings from the menu is performed upon pressing “UP”, “DOWN” keys from the navigation keypad. The corresponding LED will turn orange, when the selected POWER OPERATION MODE setting is set to a different than “Ignore” value.



The table below depicts the mode scenario based on the faceplate pushbuttons selection. When In Remote mode, the AUTO, OFF, and MANUAL mode can be selected also remotely via SCADA, or other remote command:

REMOTE-LOCAL: The REMOTE/LOCAL pushbutton toggles between REMOTE and LOCAL mode of operation. Each of these two modes is associated with LED to show the selection. The REMOTE/LOCAL selection is available only from the Multilin DGCV faceplate.

AUTO-OFF-MANUAL: This pushbutton is used to switch between AUTO, OFF, and MANUAL mode. When set to AUTO mode, the “AUTO” LED turns orange. In the same way, if the mode is set to MANUAL, the “MANUAL” LED turns green and the “AUTO” LED turns off. In AUTO mode, the motor of the tap changer is controlled by the auto functions set from the controller. In MANUAL mode, the automatic operation and the remote control are inhibited, and the tap changer can be controlled locally by pressing the faceplate RAISE or LOWER pushbutton. When “OFF” mode is selected, the voltage to the tap changer motor is disconnected. Both the “AUTO”, and “MANUAL” LEDs turn off. The tap changer cannot be controlled either automatically, remotely, or manually.

Pushbutton Auto Manual

Remote Control Enabled

• Automatic Operation Enabled

• SCADA read enabled

• SCADA Remote Open/Close control override

• Remote Inputs Open/Close control override

• Manual Open/Close control disabled

• Automatic Operation disabled

• SCADA read only enabled

• SCADA Remote Open/Close control disabled

• Remote Inputs Open/Close control disabled

• Manual Open/Close control enabled

Local Control Enabled

• Automatic Operation Enabled




• Manual Open/Close control disabled

• Automatic Operation disabled




• Manual Open/Close control enabled

RAISE, LOWER: The RAISE and LOWER pushbuttons are used to manually control the transformer on-load tap changer. Pressing the RAISE pushbutton will lead to increasing the tap changer position by one step. Similarly, the tap position will be lowered by one step if the LOWER pushbutton is pressed. Pressing either of these two pushbuttons generates a pulse with a user programmable width, to ensure the completion of the change.



EXTERNAL POWER

Figure 3: External Power Control panel

The Multilin DGCV faceplate is equipped with a three-state switch for selection of Internal or External voltage. With the switch in the External position, the sensing and motor power circuits are connected to the external power binding post on the front panel. The unit can be tested using a 120 V RMS source with correct polarity applied to these terminals. Testing of the regulator can be accomplished by adjusting the amplitude of the external source. The switch disconnects all power from the unit if switched to External power with no power source applied to the front panel voltage terminals. The External Control Power binding posts allow application of a 120 V RMS nominal voltage to the unit for test purposes.The binding posts designated as VOLTAGE METER allow reading of the input voltage for calibration purposes.

Working with the KeypadThe display messages are organized into a Main Menu, pages, and sub-pages. There are four main menus labeled Actual Values, Quick Setup, Setpoints, and Maintenance. Pressing the MENU key followed by the MESSAGE key scrolls through the four Main Menu headers, which appear in sequence as follows:

Figure 4: The four Main Menu headers

Pressing the MESSAGE ► key or the ENTER key from these Main Menu pages will display the corresponding menu Page. Use the MESSAGE ▲ and MESSAGE ▼ keys to scroll through the Page headers.

█ ACTUAL VALUES

QUICK SETUP

SETPOINTS

MAINTENANCE



Figure 5: Typical paging operation from Main Menu selection

When the display shows SETPOINTS, pressing the MESSAGE ► key or the ENTER key will display the page headers of programmable parameters (referred to as setpoints in the manual). When the display shows ACTUAL VALUES, pressing the MESSAGE ► key or the ENTER key displays the page headers of measured parameters (referred to as actual values in the manual). Each page is broken down further into logical sub-pages of messages. The MESSAGE ▲ and MESSAGE ▼ keys are used to navigate through the sub-pages. A summary of the setpoints and actual values pages can be found in the Chapters : Setpoints and Actual Values, respectively.The ENTER key is dual purpose. It is used to enter the sub-pages and to store altered setpoint values into memory to complete the change. The MESSAGE ► key can also be used to enter sub-pages but not to store altered setpoints.The ESCAPE key is also dual purpose. It is used to exit the sub-pages and to cancel a setpoint change. The MESSAGE ◄ key can also be used to exit sub-pages and to cancel setpoint changes.The VALUE keys are used to scroll through the possible choices of an enumerated setpoint. They also decrement and increment numerical setpoints. The DRAG HAND RESET setting provides for the selection of an input for remotely resetting the Max and Min tap indications from the tap position indicator. Upon energizing the programmed input, the Maximum and Minimum tap statistic data from the PRODUCT INFO menu will also reset. The command energizes a drag-hand output relay, which when wired to the tap position indicator, applies ~120 V AC to the drag-hands coils.The MESSAGE ▲ and MESSAGE ▼ keys scroll through any active conditions in the relay.

█ CLOCK

A1 STATUS

CONTACT INPUTS

OUTPUT RELAYS

█

ACTUAL VALUES

A1 STATUS

A2 METERING

A3 RECORDS

█

CONTACT INPUTS

A1 STATUS

OUTPUT RELAYS

CLOCK

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▼Back

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Back 1 click



LED status indicatorsThe Multilin DGCV Voltage Regulator faceplate provides easy navigation through full keypad pushbuttons, conveniently located tap changer control pushbuttons, quick access to setpoints, regulation transparency through LED indicators, and a 4 by 20 character Liquid Crystal Display. The faceplate includes the following components:

• IN SERVICE: Green

The Multilin DGCV is operational and functions properly, when the “In-Service” LED is lit green. The LED turns off upon detection of an internal firmware or hardware error. The product is not programmed when shipped, and the “In-Service” LED will not light upon power-up. The LED will turn green upon selecting the setting “Ready” under the S1 INSTALLATION/PRODUCT STATUS menu.

• ALARM: Orange

The “Alarm” LED turns orange upon detection of either internal firmware, hardware error, or upon alarm conditions driven by control of the tap changer such as “Change Unsuccessful”, or “Incomplete Sequence Change”.

• COMMS OK: Green/Orange

The communications LED is a bi-colour LED; it will light green when the transmit/receive channels are set and the Multilin DGCV is communicating with another smart device or SCADA. The LED will turn red if the communication channels – because of communication card failure, or communication channels not working properly - are no longer functioning.

• NEUTRAL POSITION: Green

The "Neutral Position” LED turns green, when the tap changer moves the lead to the neutral tap of the tapped winding.

• IN BAND: Green

The "In Band” LED turns orange, when the measured voltage is within the programmed voltage bandwith.

• HIGH (LOW) BAND: Orange

The “High Band” or “Low Band” LED turns orange if the measured load voltage is “out of band,” such as above the programmed high band voltage level, or below the programmed low band voltage respectively.

• HIGH (LOW) VOLTAGE LIMIT: Orange

The “High Voltage Limit” and “Low Voltage Limit” LEDs turn orange when the measured load voltage is either above or below the user programmed voltage runback limits respectively. Under such conditions, the Voltage Regulator issues a tap change command to the tap changer without any time delay.

• VOLTAGE REDUCTION: Orange

This LED lights up orange, when any of the three voltage reduction stages has been activated.

• AUTO INHIBIT: Orange

This LED lights up orange, when any of the inhibiting elements has been activated upon triggering any of its programmed settings.

• REVERSE POWER: Orange

Тhe “Reverse Power” LED turns orange, when the Voltage Regulator detects reverse power in excess of the programmed reverse power setting for the specified time delay.


SOFTWARE SETUP CHAPTER 3: INTERFACES

Software setup

EnerVista Multilin DGCV Setup SoftwareAlthough settings can be entered manually using the control panel keys, a PC can be used to download setpoints through the communications port. The software is available from GE Multilin to make this as convenient as possible. With running, it is possible to:

• Program and modify settings

• Load and save setting files to and from a disk

• Read actual values

• Monitor status

• Read pre-trip data and event records

• Get help on any topic

• Upgrade the firmware

The software allows immediate access to all features with easy to use pull down menus in the familiar Windows environment. This section provides the necessary information to install , upgrade the relay firmware, and write and edit setting files.The software can run without a connected to the computer. In this case, settings may be saved to a file for future use. If a is connected to a PC and communications are enabled, the can be programmed from the setting screens. In addition, measured values, status and trip messages can be displayed with the actual value screens.

Hardware andsoftware

requirements

The following requirements must be met for the software.

• Microsoft Windows™ 7 / XP is installed and running properly.

• At least 100 MB of hard disk space is available.

• At least 256 MB of RAM is installed.

The software can be installed from either the GE EnerVista CD or the GE Multilin website at http://www.GEmultilin.com.

Installing theEnerVista DGCVSetup software

After ensuring the minimum requirements indicated earlier, use the following procedure to install the EnerVista DGCV Setup software from the enclosed GE EnerVista CD.

1. Insert the GE EnerVista CD into your CD-ROM drive.

2. Click the Install Now button and follow the installation instructions to install the no-charge EnerVista software on the local PC.

3. When installation is complete, start the EnerVista Launchpad application.

4. Click the IED Setup section of the LaunchPad toolbar.

5. In the EnerVista Launchpad window, click the Add Product button and select the Multilin DGCV Voltage Regulator as shown below. Select the Web option to ensure the most recent software release, or select CD if you do not have a web connection, then click the Add Now button to list software items for the Multilin DGCV .

CHAPTER 3: INTERFACES SOFTWARE SETUP


6. EnerVista Launchpad will obtain the latest installation software from the Web or CD and automatically start the installation process. A status window with a progress bar will be shown during the downloading process.

7. Select the complete path, including the new directory name, where the EnerVista DGCV Setup software will be installed.

8. Click on Next to begin the installation. The files will be installed in the directory indicated, the USB driver will be loaded into the computer, and the installation program will automatically create icons and add EnerVista DGCV Setup software to the Windows start menu.

9. The Multilin DGCV device will be added to the list of installed IEDs in the EnerVista Launchpad window, as shown below.



If you are going to communicate from your computer to the Relay using the USB port:

10. Plug the USB cable into the USB port on the Relay then into the USB port on your computer.

11. Launch EnerVista DGCV Setup from LaunchPad.

12. In EnerVista > Device Setup:



13. Select USB as the Interface type.

14. Select Multilin DGCV as the USB device.

Connecting EnerVista DGCV Setup to the device

Configuring serialcommunications

Before starting, verify that the cable is properly connected to either the USB port on the front panel of the device (for USB communications) or to the RS485 terminals on the back of the device (for RS485 communications). This example demonstrates an USB connection. For RS485 communications, the GE Multilin F485 converter will be required. Refer to the F485 manual for additional details.

1. Install and start the latest version of the software (available from the GE Multilin web site). See the previous section for the installation procedure.

2. Click on the Device Setup button to open the Device Setup window and click the Add Site button to define a new site.

3. Enter the desired site name in the "Site Name" field. If desired, a short description of the site can also be entered. In this example, we will use “Substation 1” as the site name.

4. The new site will appear in the upper-left list in the window.

5. Click the Add Device button to define the new device.

6. Enter the desired name in the "Device Name" field and a description (optional) of the device.

7. Select “Serial” from the Interface drop-down list.



8. Click the Read Order Code button to connect to the device and upload the order code.

9. Click OK when the relay order code has been received. The new device will be added to the Site List window (or Online window) located in the top left corner of the main window.

The Site Device has now been configured for USB communications. Proceed to Connecting to the Multilin DGCV below, to begin communications.

Using the QuickConnect feature

The Quick Connect button can be used to establish a fast connection through the front panel USB port of a DGC device. The following window will appear when the QuickConnect button is pressed:

As indicated by the window, the "Quick Connect" feature can quickly connect the software to a front port if a USB is selected in the interface drop-down list. Select a device and press the Connect button. When connected, a new Site called “Quick Connect” will appear in the Site List window.



The DGC Device has now been configured via the Quick Connect feature for USB communications. Proceed to Connecting to the Multilin DGCV , below, to begin communications.

Connecting to theMultilin DGCV

Now that the communications parameters have been properly configured, the user can easily communicate with the device.

1. Expand the Site list by double clicking on the site name or clicking on the «+» box to list the available devices for the given site.

2. Desired device trees can be expanded by clicking the «+» box. The following list of headers is shown for each device:Device DefinitionActual ValuesQuick SetupSetpointsMaintenance.

3. Expand the SETTINGS > PRODUCT SETUP list item and double click on Front Panel to open the "Front Panel" settings window as shown below:



4. The "Front Panel" settings window will open with a corresponding status indicator on the lower left of the EnerVista DGCV Setup window.

5. If the status indicator is red, verify that the serial or USB cable is properly connected to the relay, and that the device has been properly configured for communications (steps described earlier).

The "Front Panel" settings can now be edited, printed, or changed. Other settings and command windows can be displayed and edited in a similar manner. "Actual Values" windows are also available for display. These windows can be arranged, and resized at will.

Working with settings and settings files

Engaging a device The EnerVista DGCV Setup software may be used in on-line mode (relay connected) to directly communicate with a DGC device. Communicating devices are organized and grouped by communication interfaces and into sites. Sites may contain any number of devices selected from the product series.



Entering settings The System Setup page will be used as an example to illustrate the entering of settings. In this example, we will be changing the voltage sensing settings.

1. Establish communications with the DGC device.

2. Select the Setpoint > System Setup > Voltage Sensing menu item.

3. Select the Bus VT Secondary settings by clicking anywhere in the parameter box. This will display three arrows: two to increment/decrement the value and another to launch the numerical keypad.

4. Clicking the arrow at the end of the box displays a numerical keypad interface that allows the user to enter a value within the setpoint range displayed near the top of the keypad: Click = to exit from the keypad and keep the new value. Click on X to exit from the keypad and retain the old value.

5. For settings requiring non-numerical pre-set values (e.g. 3-Phase voltage connection below), clicking anywhere within the Voltage Input Parameter box displays a drop-down selection menu arrow. Select the desired value from this list.



6. For settings requiring an alphanumeric text string (e.g. "relay name"), the value may be entered directly within the settings Parameter box.

7. In the Setpoint > System Setup > Voltage Sensing dialog box, click on Save to save the values into the . Click YES to accept any changes and exit the window. Click Restore to retain previous values. Click Default to restore Default values.

File support Opening any file will automatically launch the application or provide focus to the already opened application. If the file is a settings file (has a ‘DGC’ extension) which had been removed from the Settings List tree menu, it will be added back to the Settings List tree.New files will be automatically added to the tree.

Using settings files The software interface supports three ways of handling changes to Multilin DGCV settings:

• In off-line mode (DGC disconnected) to create or edit DGC settings files for later download to communicating DGC devices.

• Directly modifying DGC settings while connected to a communicating DGC device, then saving the settings when complete.

• Creating/editing settings files while connected to a communicating DGC device, then saving them to the device when complete.

Settings files are organized on the basis of file names assigned by the user. A settings file contains data pertaining to the following types of DGC settings:

• Device Definition

• DGC Setup

• System Setup

• Protection

• Control

• Inputs/Outputs

Factory default values are supplied and can be restored after any changes.The displays DGC settings with the same hierarchy as the front panel display.

Downloading andsaving settings files

Settings must be saved to a file on the local PC before performing any firmware upgrades. Saving settings is also highly recommended before making any settings changes or creating new settings files.The settings files in the window are accessed in the Files Window. Use the following procedure to download and save settings files to a local PC.

1. Ensure that the site and corresponding device(s) have been properly defined and configured as shown in Connecting to the Multilin DGCV , above.

2. Select the desired device from the site list.

3. Select the Online > Read Device Settings from Device menu item, or right-click on the device and select Read Device Settings to obtain settings information from the device.

4. After a few seconds of data retrieval, the software will request the name and destination path of the settings file. The corresponding file extension will be automatically assigned. Press Receive to complete the process. A new entry will be added to the tree, in the File pane, showing path and file name for the setting file.

Adding settings filesto the environment

The software provides the capability to review and manage a large group of settings files. Use the following procedure to add an existing file to the list.



1. In the files pane, right-click on Files and select the Add Existing Setting File item as shown:

2. The Open dialog box will appear, prompting the user to select a previously saved settings file. As for any other MS Windows® application, browse for the file to be added then click Open. The new file and complete path will be added to the file list.

Creating a newsettings file

The software allows the user to create new settings files independent of a connected device. These can be uploaded to a device at a later date. The following procedure illustrates how to create new settings files.



1. In the File pane, right click on File and select the New Settings File item. The following box will appear, allowing for the configuration of the settings file for the correct firmware version. It is important to define the correct firmware version to ensure that settings not available in a particular version are not downloaded into the device.

2. Select the Firmware Version, and Order Code options for the new settings file.

3. For future reference, enter some useful information in the Description box to facilitate the identification of the device and the purpose of the file.

4. To select a file name and path for the new file, click the button beside the File Name box.

5. Select the file name and path to store the file, or select any displayed file name to replace an existing file. All setpoint files should have the extension ‘DGC’ (for example, ‘feeder1.DGC’).

6. Click OK to complete the process. Once this step is completed, the new file, with a complete path, will be added to the EnerVista DGCV Setup software environment.

Upgrading settingsfiles to a new revision

It is often necessary to upgrade the revision for a previously saved settings file after the firmware has been upgraded. This is illustrated in the following procedure:

1. Establish communications with the relay.

2. Select the Maintenance > M1 Relay Info menu item and record the Firmware Revision.

3. Load the settings file to be upgraded into the EnerVista DGCV Setup environment as described in the section, Adding Settings Files to the Environment.

4. In the File pane, select the saved settings file.

5. From the main window menu bar, select the Offline > Edit Settings File Properties menu item and note the File Version of the settings file. If this version is different from the Firmware Revision noted in step 2, select a New File Version that matches the Firmware Revision from the pull-down menu.



6. For example, if the firmware revision is 1.20) and the current settings file revision is 1.10, change the setpoint file revision to “1.2x”.

7. Enter any special comments about the settings file in the "Description" field.

8. Select the desired firmware version from the "New File Version" field.

9. When complete, click OK to convert the settings file to the desired revision. See Loading Settings from a File below, for instructions on loading this settings file into the Multilin DGCV device.

Printing settings andactual values

The EnerVista DGCV Setup software allows the user to print partial or complete lists of settings and Actual Values. Use the following procedure to print a list of settings:

1. Select a previously saved settings file in the File pane or establish communications with a device.

2. From the main window, select the Offline > Export Settings File menu item.



3. The Print/Export Options dialog box will appear. Select Settings in the upper section and select either Include All Features (for a complete list) or Include Only Enabled Features (for a list of only those features which are currently used) in the filtering section and click OK.

4. The process for Offline > Print Preview Settings File is identical to the steps above.

5. Settings lists can be printed in the same manner by right clicking on the desired file (in the file list) or device (in the device list) and selecting the Print Device Information or Print Settings File options.

Printing actual valuesfrom a connected

device

A complete list of actual values can also be printed from a connected device with the following procedure:

1. Establish communications with the desired device.

2. From the main window, select the Online > Print Device Information menu item

3. The Print/Export Options dialog box will appear. Select Actual Values in the upper section and select either Include All Features (for a complete list) or Include Only Enabled Features (for a list of only those features which are currently used) in the filtering section and click OK.

Actual Values lists can be printed in the same manner by right clicking on the desired device (in the device list) and selecting the Print Device Information option



Loading settings froma file

CAUTION

CAUTION: An error message will occur when attempting to download a settings file with a revision number that does not match the relay firmware. If the firmware has been upgraded since saving the settings file, see for instructions on changing the revision number of a settings file.

The following procedure illustrates how to load settings from a file. Before loading a settings file, it must first be added to the environment as described in the section, Adding Settings Files to the Environment.

1. Select the previously saved settings file from the File pane of the EnerVista DGCV Setup software main window.

2. Select the Offline > Edit Settings File Properties menu item and verify that the corresponding file is fully compatible with the hardware and firmware version of the target device. If the versions are not identical, see Upgrading Settings Files to a New Revision for details on changing the settings file version.

3. Right-click on the selected file and select the Write Settings File to Device item.

4. Select the target device from the list of devices shown and click Send. If there is an incompatibility, an "Incompatible device..." error message will be shown.

If there are no incompatibilities between the target device and the settings file, the data will be transferred to the device. An indication of the percentage completed will be shown in the bottom of the main window.

Upgrading Multilin DGCV firmwareTo upgrade the Multilin DGCV firmware, follow the procedures listed in this section. Upon successful completion of this procedure, the device will have new firmware installed with the factory default setpoints.The latest firmware files are available from the GE Multilin website at http:// www.GEmultilin.com.

NOTE

NOTE: EnerVista DGCV Setup software prevents incompatible firmware from being loaded into a DGC device.

NOTE

NOTE: Before upgrading firmware, it is very important to save the current Multilin DGCV settings to a file on your PC. After the firmware has been upgraded, it will be necessary to load this file back into the device. Refer to Downloading and Saving Settings Files for details on saving settings to a file.

Loading new DGCfirmware

Loading new firmware into the flash memory is accomplished as follows:

1. Connect the device to the local PC and save the settings to a file as shown in Downloading and Saving Settings Files.

2. Select the Maintenance > Update Firmware menu item.

3. The software will request the new firmware file. Locate the folder that contains the firmware files to load into the . The firmware filename has the following format:

MJ M03 M A 100 . 000

Modification Number (000 = none)

Board Assembly Rev #

Code Type in Memory Device

PCB Code Number

Product Reference Code (MJ = DGC)

Firmware Rev #



4. EnerVista DGCV Setup software now prepares the to receive the new firmware file. The front panel will momentarily display "DGC BOOT PROGRAM Waiting for Message,” indicating that it is in upload mode.

5. While the file is being loaded into the device, a status box appears showing how much of the new firmware file has been transferred, and the upgrade status. The entire transfer process takes approximately 10 minutes.

6. The software will notify the user when the EnerVista DGCV Setup program has finished loading the file. Carefully read any displayed messages and click OK to return the main screen. Cycling power to the relay is recommended after a firmware upgrade.

After successfully updating the firmware, the device will not be in service and will require settings programming. To communicate with the relay, the communication settings may have to be manually reprogrammed.When communications are established, the saved setpoints must be reloaded back into the device. See Loading Settings from a File for details.Modbus addresses assigned to firmware modules, features, settings, and corresponding data items (i.e. default values, min/max values, data type, and item size) may change slightly from version to version of the firmware.Addresses are rearranged when new features are added or existing features are enhanced or modified.

Advanced EnerVista DGCV Setup features

Event records The EnerVista DGCV Setup software can be used to capture events from the device at the instance of a pickup, trip, alarm, or other condition.

• With EnerVista DGCV Setup software running and communications established, select the Actual Values > A3 Records > Event Records menu item to open the Event Records Viewer window.



• Click on the Save Events button to save the selected events to the local PC.

Data logger The data logger feature is used to sample and record up to ten actual values at a selectable interval. The datalogger can be run with Continuous mode Enabled, which will continuously record samples until stopped by the user; or with Continuous mode Disabled, which will trigger the datalog once without overwriting previous data.Viewing and saving of the Datalogger is performed as follows:

1. With running and communications established, select the A3 Records > Data Logger menu item to open the datalog setup window:



2. If Continuous mode is enabled, click on Stop to stop the datalog

3. Click on the Save to File button to save the datalog to the local PC. A new window will appear requesting for file name and path.

4. One file is saved as a COMTRADE file, with the extension ‘CFG’. The other file is a DAT file, required by the COMTRADE file for proper display of data.

5. To view a previously saved COMTRADE file, click the Open button and select the corresponding COMTRADE file.

6. To view the datalog, click the Launch Viewer button. A detailed Datalog window will appear as shown below.



7. The datalog can be set to capture another buffer by clicking on Run (when Continuous mode is enabled), or by clicking on Release (when Continuous mode is disabled).

Password security Password security is an optional feature of the Multilin DGCV which can be setup using the EnerVista DGCV Setup software. The password system has been designed to facilitate a hierarchy for centralized management. This is accomplished through a Master level access password which can be used for resetting lower level access passwords and higher level privileged operations. In cases where operational security is required as well as a central administrative authority then the use of the password system is highly encouraged. The feature robustness of this system requires it to be managed exclusively through the EnerVista setup software. This section describes how to perform the initial setup. For more details on the password security feature, refer to Chapter 6 - Password Security.

1. Multilin DGCV devices shipped from the factory are initially set with security disabled. If the password security feature is to be used, the user must first change the Master Reset Password from the initial Null setting. This can be done only over communications, not from the front panel keypad. The new Master Reset Password must be 8 to 10 characters in length, and must have minimum 2 letters and 2

Display graph values

at the corresponding

cursor line. Cursor

lines are identified by

their colors.

CURSOR

LINES

To move lines locate the mouse pointer

over the cursor line then click and drag

the cursor to the new location.

DELTA

Indicates time difference

between the two cursor lines

TRIGGER LINE

Indicates the

point in time for

the trigger

FILE NAME

Indicates the

file name and

complete path

(if saved)

TRIGGER TIME & DATE

Display the time & date of the

Trigger

VECTOR DISPLAY SELECT

Click here to open a new graph

to display vectors

CURSOR LINE POSITION

Indicate the cursor line position

in time with respect to the

trigger time



numbers. The letters are case sensitive. After entering a valid Master Reset Password, enter the new Master Reset Password again to confirm, then select Change Password.

2. Now that the Master Reset Password has been programmed, enter it again to log in to the Master Access level. The Master Level permits setup of the Remote and Local Passwords. If the Master Reset Password has been lost, record the Encrypted Key and contact the factory to have it decrypted.

3. With Master Level access, the user may disable password security altogether, or change the Master Reset Password.

4. The Master Access level allows programming of the Remote Setpoint and Remote Control passwords. These passwords are initially set to a Null value, and can only be set or changed from a remote user over RS485 communications. Remote Passwords must be 3 to 10 characters in length.



5. Initial setup of the Local Setpoint and Local Control passwords requires the Master Access level. If Overwrite Local Passwords is set to YES, Local passwords can be changed remotely only (over RS485). If Overwrite Local Passwords is set to NO, Local Passwords can be changed locally only (over USB or keypad). If changing Local Passwords is permitted locally, the keypad user can only change the Local Passwords if they have been changed from the initial NULL value to a valid one. Local Passwords must be 3 to 10 characters in length.

6. If any Remote Password has never been set, that level will not be attainable except when logged in as the Master Level. The same logic applies to the Local Passwords.

7. When passwords have been set, the user will be prompted to enter the appropriate password depending on the interface being used (remote or local), and the nature of the change being made (setpoint or control). If the correct password is entered, the user is now logged into that access level over that interface only. The access level turns off after a period of 5 minutes of inactivity, if control power is cycled, or if the user enters an incorrect password.



Chapter 4: Actual values

Digital Energy

Actual values

A2 METERING

CURRENT

VOLTAGE

POWER

FREQUENCY

THD

HARMONICS

▼

A1 STATUS

CLOCK

CONTACT INPUTS

OUTPUT RELAYS

VIRTUAL INPUTS

VIRTUAL OUTPUTS

C. INPUTS SUMMARY

OUT RELAYS SUMMARY

FLEXLOGIC SUMMARY

TAP POSITION

ACTIVE GROUP

▼

ACTUAL VALUES

A1 STATUS

A2 METERING

A3 RECORDS

A4 TARGET MESSAGES

891961.cdr

A3 RECORDS

EVENT RECORDS

DATA LOGGER

CLEAR EVENT REC

CLEAR DATA LOGGER

▼

A4 TARGET MESSAGES

Target Message 1

State:

Target Message 2

State:

...

▼

▼


A1 STATUS CHAPTER 4: ACTUAL VALUES

A1 Status

The main Status Menu is shown below:

Figure 1: Status menu

A1 CONTACT INPUTS

CONTACT INPUT 1

CONTACT INPUT 2

...

CONTACT INPUT n

▼

A1 CLOCK

CURRENT DATE

CURRENT TIME

▼

A1 STATUS

CLOCK

CONTACT INPUTS

OUTPUT RELAYS

VIRTUAL INPUTS

VIRTUAL OUTPUTS

C. INPUTS SUMMARY

OUT RELAYS SUMMARY

FLEXLOGIC SUMMARY

TAP POSITION

ACTIVE GROUP

▼

891963.cdr

A1 OUTPUT RELAYS

OUTPUT RELAY 1

...

▼

OUTPUT RELAY 2

OUTPUT RELAY 3

OUTPUT RELAY x

A1 FLEXLOGIC SUMMARY

FLEXLOGIC STATUS

FLEX LINES USED

▼

A1 VIRTUAL INPUTS

1

2

...

32

VIRTUAL INPUT

VIRTUAL INPUT

VIRTUAL INPUT

▼

A1 VIRTUAL OUTPUTS

1

2

...

32

VIRTUAL OUTPUT

VIRTUAL OUTPUT

VIRTUAL OUTPUT

▼

RLY 1 OFF RLY 5 OFF

RLY 2 OFF RLY 6 OFF

RLY 3 OFF RLY 7 OFF

RLY 4 OFF RLY 8 OFF

CI 1 OFF CI 5 OFF

CI 2 OFF CI 6 OFF

CI 3 OFF CI 7 OFF

CI 4 OFF CI 8 OFF

CI 9 OFF

CI 10 OFF

CI 11 OFF

CI 12 OFF

Contact Inputs Summary

Output Relays Summary

NOTE: # of outputs dependson ordercode

NOTE: # of inputs dependson ordercode

A1 TAP POSITION

TAP POSITION

A1 ACTIVE GROUP

ACTIVE GROUP

CHAPTER 4: ACTUAL VALUES A1 STATUS


ClockPATH: ACTUAL VALUES > A1 STATUS > CLOCK

CURRENT DATEFeb 12 2009

Range: Date in format shown

Indicates today’s date.

CURRENT TIME09:17:12

Range: Time in format shown

Indicates the current time of day.

Contact inputsPATH: ACTUAL VALUES > A1 STATUS > CONTACT INPUTS

CONTACT INPUT 1 to 12OFF

Range: Off, On

Message displays the state of the contact input. The message “ON” indicates that the contact input is energized, and message “OFF” indicates a de-energized contact.

Output relaysPATH: ACTUAL VALUES > A1 STATUS > OUTPUT RELAYS

RAISE TAP (Output Relay #1)OFF

Range: Off, On

The “ON” state of Output Relay #1 (TRIP) shows that a TRIP command has been sent to the breaker.

LOWER TAP (Output Relay #2)OFF

Range: Off, On

The “ON” state of Output Relay #2 (CLOSE) shows that a close command has been sent to the breaker.

OUTPUT RELAY 3 to X (Auxiliary Output Relays)OFF

Range: Off, On


A1 STATUS CHAPTER 4: ACTUAL VALUES

Virtual inputsThe state of all active virtual inputs is displayed here. PATH: ACTUAL VALUES > A1 STATUS > VIRTUAL INPUTS

VIRTUAL INPUTS 1 to 32OFF

Range: Off, On

Virtual outputsThe state of all active virtual outputs is displayed here. PATH: ACTUAL VALUES > A1 STATUS > VIRTUAL OUTPUTS

VIRTUAL OUTPUTS 1 to 32OFF

Range: Off, On

Contact inputs summaryC. INPUTS SUMMARY

The display shows a summary of the states of all contact inputs.

Output relays summaryPATH: ACTUAL VALUES > A1 STATUS > OUT RELAYS SUMMARY

OUTPUT RELAYS SUMMARY

This display shows a summary of the states of all output relays.

NOTE

NOTE: Output Relays #1 and #2 are the Raise Tap and Lower Tap relays respectively.

CI#1 OFF CI#7 OFF

CI#2 OFF CI#8 OFF

CI#3 OFF CI#9 OFF

CI#4 OFF CI#10 OFF

CI#5 OFF CI#11 OFF

CI#6 OFF CI#12 OFF

RLY#1 OFF RLY#5 OFF

RLY#2 OFF RLY#6 OFF

RLY#3 OFF RLY#7 OFF

RLY#4 OFF RLY#8 OFF

CHAPTER 4: ACTUAL VALUES A1 STATUS


Flexlogic summaryPATH: ACTUAL VALUES > A1 STATUS > FLEXLOGIC SUMMARY

FLEXLOGIC SUMMARY

Tap positionPATH: ACTUAL VALUES > A1 STATUS > TAP POSITION

TAP POSITION - For Positive Tap Range Selections (3-Phase & Single-Phase)5Range: 0 to 39 in steps of 1

TAP POSITION - For Negative/Positive Tap Range Selections (3-Phase & Single-Phase)5RRange: 19L to 19R in steps of 1 (0 – neutral tap)

Active groupPATH: ACTUAL VALUES > A1 STATUS > ACTIVE GROUP

ACTIVE GROUP


A2 METERING CHAPTER 4: ACTUAL VALUES

A2 Metering

The Multilin DGCV unit measures RMS of the fundamental frequency component for the voltage and current inputs, and detects the system frequency using the connected voltage input. Based on the measured AC inputs, the unit calculates line current and line voltages, power and power factor, Total Harmonic Distortion (THD) and 2nd to 8th harmonics per input. All currents and voltages are recalculated four times per power system cycle at fundamental frequency. Harmonic measurements are fully calculated every 3.5 power system cycles. Line current, Line voltage and Line compensated voltage are filtered values used for the control algorithm. The integration is based on a IIR filter over the last 10 measurements. However, if abrupt changes of higher than 2 p.u. are detected, a quick updates over these registers are performed. The displayed metered quantities are updated approximately three (3) times a second for readability. The Multilin DGCV provides the following measurements and metered values:

• Phase-Ground Voltages (V)

• Phase -to-phase Voltages (V)

• Line Voltage (V)

• Phase currents (A)

• Line Current (A)

• 3-Phase Active power (kW)

• 3-Phase Reactive power (kvar)

• 3-Phase Apparent Power (kVA)

• Power Factor (Lag or Lead)

• 2nd to 8th harmonic in % – for the connected to the VR phase current

• 2nd to 8th harmonic in % – for the connected to the VR voltage

• THD in % – for connection to the VR phase current

• THD in % – for connection to the VR voltage.

The single phase/ 3 phase DGC connection is chosen based on the order code and the VT Input:Single Phase connection applies to the Multilin DGCV with one of the following configurations:

• IO_H card is installed

• IO_A card installed and the VT Input is programmed to Line-To-Line or Line-To- Ground

Three Phase connection applies only to Multilin DGCV with the configuration:

• IO_A card installed and the VT Input programmed to Wye or Delta.

When a single phase connection is chosen, the voltage and current inputs correspond to the phase A inputs.By scrolling the Up/Down keys the unit shows one-by-one, all metered values as follows:

CHAPTER 4: ACTUAL VALUES A2 METERING


Figure 2: Metering menu

A2 METERING

CURRENT

VOLTAGE

POWER

FREQUENCY

THD

HARMONICS

▼

A1 STATUS

CLOCK

CONTACT INPUTS

OUTPUT RELAYS

VIRTUAL INPUTS

VIRTUAL OUTPUTS

C. INPUTS SUMMARY

OUT RELAYS SUMMARY

FLEXLOGIC SUMMARY

TAP POSITION

ACTIVE GROUP

▼

ACTUAL VALUES

A1 STATUS

A2 METERING

A3 RECORDS

A4 TARGET MESSAGES

891960.cdr

A3 RECORDS

EVENT RECORDS

DATA LOGGER

CLEAR EVENT REC

CLEAR DATA LOGGER

▼

A2 CURRENT

PH A CURRENT

PH B CURRENT

PH C CURRENT

LINE CURRENT

GND CURRENT

▼

A4 TARGET MESSAGES

OVERVOLTAGE PH A

TAP CHANGER

▲

▼

A2 VOLTAGE

PH A

PH B

PH C

LINE

COMP

VOLTAGE

VOLTAGE

VOLTAGE

VOLTAGE

VOLTAGE

▼

A2 POWER

3 ph ACTIVE POWER

POWER FACTOR

3 ph REACTIVE POWER

3 ph APPARENT POWER

▼

A2 FREQUENCY

FREQUENCY

A2 THD

THD PH A CURRENT

THD PH B CURRENT

THD PH C CURRENT

THD PH A VOLTAGE

THD PH B VOLTAGE

THD PH C VOLTAGE

▼

A2 HARMONICS

2ND HARM PH A CRNT

2ND HARM PH B CRNT

2ND HARM PH C CRNT

2ND HARM PH A VOLT

2ND HARM PH B VOLT

2ND HARM PH C VOLT

...

8TH HARM PH A CRNT

8TH HARM PH B CRNT

8TH HARM PH C CRNT

8TH HARM PH A VOLT

8TH HARM PH B VOLT

8TH HARM PH C VOLT

▼



By scrolling the Up/Down keys, the unit shows one-by-one, all metered values as follows:

Current3-PHASE DGC

PH A CURRENT0.0 A 0° lag

Range: 0.0 to 20000.0 A, 0 to 359° lag

PH B CURRENT0.0 A 0° lag

Range: 0.0 to 20000.0 A, 0 to 359° lag

PH C CURRENT0.0 A 0° lag

Range: 0.0 to 20000.0 A, 0 to 359° lag

LINE CURRENT0.0 A 0° lag

Range: 0.0 to 20000.0 A, 0 to 359° lag

GND CURRENT0.0 A 0° lag

Range: 0.0 to 20000.0 A, 0 to 359° lag

SINGLE-PHASE DGC

LINE CURRENT0.0 A x CT 0° lag

Range: 0.0 to 2000.0 A, 0 to 359° lag

Voltage3-PHASE DGC

PH A VOLTAGE0.0 V 0° lag

Range: 0.0 to 130000.0 V

PH B VOLTAGE0.0 V 0° lag

Range: 0.0 to 130000.0 V

PH C VOLTAGE0.0 V 0° lag

Range: 0.0 to 130000.0 V

LINE VOLTAGE0.0 V 0° lag

Range: 0.0 to 130000.0 V

COMP VOLTAGE0.0 V x VT 0° lag

Range: 0.0 to 130000.0 V



SINGLE-PHASE DGC

LINE VOLTAGE0.0 V x VT 0° lag

Range: 0.0 to 130000.0 V

COMP VOLTAGE0.0 V x VT 0° lag

Range: 0.0 to 130000.0 V

Power3-PHASE DGC

3-PH ACTIVE POWER0.0 kW

Range: -50000.0 to 50000.0 kW

3-PH REACTIVE POWER0.0 kVAR

Range: -50000.0 to 50000.0 kVAR

3-PH APPARENT POWER0.0 kVA

Range: -50000.0 to 50000.0 kVA

POWER FACTOR0.00

Range: -0.99 to 1.00

SINGLE-PHASE DGC


Range: -50000.0 to 50000.0 kW


Range: -50000.0 to 50000.0 kVAR


Range: -50000.0 to 50000.0 kVA


Range: -50000.0 to 50000.0 kW


Range: -50000.0 to 50000.0 kVAR


Range: -50000.0 to 50000.0 kVA

POWER FACTOR0.00

Range: -0.99 to 1.00



FrequencyFREQUENCY0.00 Hz

Range: 40 to 70 Hz

Total Harmonic Distortion (THD)THD CURRENTS3-PHASE DGC

THD PH A CURRENT0.00%

Range: 0.20% to 100%

THD PH B CURRENT0.00%

Range: 0.20% to 100%

THD PH C CURRENT0.00%

Range: 0.20% to 100%

SINGLE-PHASE DGC

THD LINE CURRENT0.00%

Range: 0.20% to 100%

THD VOLTAGES3-PHASE DGC

THD PH A VOLTAGE0.00%

Range: 0.20% to 100%

THD PH B VOLTAGE0.00%

Range: 0.20% to 100%

THD PH C VOLTAGE0.00%

Range: 0.20% to 100%

SINGLE-PHASE DGC

THD LINE VOLTAGE0.00%

Range: 0.20% to 100%



HarmonicsCURRENTS3-PHASE DGC

2nd HARM PH A CRNT0.00%

Range: 0.20 to 100.00%

2nd HARM PH B CRNT0.00%

Range: 0.20 to 100.00%

2nd HARM PH C CRNT0.00%

Range: 0.20 to 100.00%..

8th HARM PH A CRNT0.00%

Range: 0.20 to 100.00%

8th HARM PH B CRNT0.00%

Range: 0.20 to 100.00%

8th HARM PH C CRNT0.00%

Range: 0.20 to 100.00%

SINGLE-PHASE DGC

2nd HARM LINE CRNT0.00%

Range: 0.20 to 100.00%..

8th HARM LINE CRNT0.00%

Range: 0.20 to 100.00%



VOLTAGES3-PHASE DGC

2nd HARM PH A VOLT0.00%

Range: 0.20 to 100.00%

2nd HARM PH B VOLT0.00%

Range: 0.20 to 100.00%

2nd HARM PH C VOLT0.00%

Range: 0.20 to 100.00%..

8th HARM PH A VOLT0.00%

Range: 0.20 to 100.00%

8th HARM PH B VOLT0.00%

Range: 0.20 to 100.00%

8th HARM PH C VOLT0.00%

Range: 0.20 to 100.00%

SINGLE-PHASE DGC

2nd HARM VOLTAGE0.00%

Range: 0.20 to 100.00%..

8th HARM VOLTAGE0.00%

Range: 0.20 to 100.00%



Default screensThe measurements and metered values can also be viewed by scrolling Up or Down through the default screens as shown below:

Power calculationWhen Multilin DGCV is connected to all three-phase currents and voltages, the three-phase power is calculated as a sum of the three individual phase power quantities.When the Multilin DGCV is connected to only one current and one voltage input, the three phase power is calculated assuming balanced system, i.e. the computed single phase power is multiplied by 3. Refer to the following diagram showing the single phase and three-phase power computation for each combination of voltage and current input programmable under the Voltage and Current Sensing setup:



Please note that for all equations below, the rotated phasor is the current phasor. The asterisk identifies conjugate value.0°) Three phase based on one phase calculation

-120°) Three phase based on one phase calculation








Table 1: Power Computation for 3-phase Multilin DGCV

*) Three phase direct calculation

**) Aron method

ABC ACB

Current Transformer Connection

Current Transformer Connection

PhA PhB PhC PhA PhB PhC

Line-to-Ground Voltage

Va 0 -120 -240 0 -240 -120

Vb -240 0 -120 -120 0 -240

Vc -120 -240 0 -240 -120 0

Line-to-Line Voltage

Vab -30 -150 -270 -330 -210 -90

Vbc -270 -30 -150 -90 -330 -210

Vca -150 -270 -30 -210 -90 -330

ABC/ACB

CT Connection:

WYE

VT Connection

WYE *

DELTA **

CHAPTER 4: ACTUAL VALUES A3 RECORDS


A3 Records

Figure 3: Records menu

Event recordsEvent Records include events generated by operation of the following functions:

• Control functions

• Raise and Lower tap commands

• Alarms, Blocks

• Change of inputs.

The events are stored in memory, which can store up to 256 events. Each event is stored with an event number, date, time, and analog data of interest. The following list shows the analog data viewable for each recorded event

CauseTimeDateLine CurrentLine Current AnglePhase A CurrentPhase B CurrentPhase C CurrentLine VoltageLine Voltage AngleVan (Wye,Va,Vb,Vc VT input)*Vbn (Wye,Va,Vb,Vc VT input)*Vcn (Wye,Va,Vb,Vc VT input)*Vab (Delta,Vab,Vbc,Vca VT input)*Vbc (Delta,Vab,Vbc,Vca VT input)*Vca (Delta,Vab,Vbc,Vca VT input)*Power Factor3Ph Real Power3Ph Reactive Power3Ph Apparent Power

ACTUAL VALUES

A1 STATUS

A2 METERING

A3 RECORDS

A4 TARGET MESSAGES

891970.cdr

A3 RECORDS

EVENT RECORDS

DATA LOGGER

CLEAR EVENT REC

CLEAR DATA LOGGER

▼

A3 DATA LOGGER

TOTAL TRIGGERS

TRIGGER CAUSE

DATA LOG STATUS

▼

A3 EVENT REC T421

E421,

“

Date

Event Record”

Time

...

A3 CLEAR DATA LOGGERCLEAR

A3 CLEAR EVENT RECCLEAR


A3 RECORDS CHAPTER 4: ACTUAL VALUES

FrequencyActual TAP ValueLine Compensated VoltageTHD Current Phase ATHD Current Phase BTHD Current Phase CTHD Voltage Phase ATHD Voltage Phase BTHD Voltage Phase C

*Dependency on VT Input selection.Because the VR manages its controls based on one voltage and one current, by knowing the line current and line voltage the user will have enough information to create and present events.

Data loggerThe data logger is used to sample and record actual values at a selectable time interval. The stored actual values are chosen according to the user’s criteria. The selection of actual values for data logging include:

Phase A CurrentPhase B CurrentPhase C CurrentLine CurrentGround CurrentSystem FrequencyVan (Wye,Va,Vb,Vc VT input)*Vbn (Wye,Va,Vb,Vc VT input)*Vcn (Wye,Va,Vb,Vc VT input)*Vab (Delta,Vab,Vbc,Vca VT input)*Vbc (Delta,Vab,Vbc,Vca VT input)*Vca (Delta,Vab,Vbc,Vca VT input)*Line VoltageLine Compensated VoltagePower Factor3Ph Reactive Power3Ph Real PowerLine THD CurrentLine THD Voltage2nd Harm Line Current3rd Harm Line Current4th Harm Line Current5th Harm Line Current6th Harm Line Current7th Harm Line Current8th Harm Line Current2nd Harm Line Voltage3rd Harm Line Voltage4th Harm Line Voltage5th Harm Line Voltage6th Harm Line Voltage7th Harm Line Voltage8th Harm Line Voltage

CHAPTER 4: ACTUAL VALUES A3 RECORDS


3 Ph Apparent PowerTHD IaTHD IbTHD IcTHD Van (Wye,Va,Vb,Vc VT input)*THD Vbn (Wye,Va,Vb,Vc VT input)*THD Vcn (Wye,Va,Vb,Vc VT input)*THD Vab (Delta,Vab,Vbc,Vca VT input)*THD Vbc (Delta,Vab,Vbc,Vca VT input)*THD Vca (Delta,Vab,Vbc,Vca VT input)*Actual Tap ValueDaily Tap OperationsTotal Tap OperationsMin Line Voltage Level per dayMax Line Voltage Level per dayMin Current Level per dayMax Current Level per dayMin Tap PositionMax Tap Position

* Dependency on VT Input selection.


A4 TARGET MESSAGES CHAPTER 4: ACTUAL VALUES

A4 Target messages

Multilin DGCV configuration errorsProper Multilin DGCV operation depends on properly selected settings. The Multilin DGCV checks the following settings for setting overlapping, and incompatibility:

• Voltage Level

• Bandwidth

• Voltage Reduction

• High Voltage Runback Limit

• Low Voltage Runback Limit

• Overvoltage Level

• Undervoltage Level.

Incorrectly selected settings may lead to incorrect VR operation, and in return this may be harmful for the tap changer and the transformer. For this reason, the Multilin DGCV is set to perform the following setpoint checks, and issue appropriate error messages.Errors are stored as flags in the Multilin DGCV register, and this allows several errors to be logged at the same time.

NOTE

NOTE: One should keep in mind, that the Multilin DGCV will allow the saving of a selected incorrect voltage setting. However in such cases, the Multilin DGCV will produce a Unit Configuration Error, and will inhibit Multilin DGCV auto operations.

If any of the above conditions do not match, an appropriate target message is shown in the display and a block is applied.

Displayed Error Message

Value Error Description Triggered upon saving an incorrect setting

No Error 0x0000 N.A.

Hi RB < Hi DB 0x0001 High Runback Limit below High Dead-Band

- High Runback Limit - Voltage Bandwidth

Lo RB < Lo DB 0x0002 Low Runback Limit above Low Dead-Band

- Low Runback Limit - Voltage Bandwidth

OV < UV 0x0004 Over-Voltage level below Under-Voltage level

- Over-Voltage Level - Under-Voltage Level

OV < Volt Level 0x0008 Over-Voltage below Voltage level - Over-Voltage Level - Voltage Level

UV > Volt Level 0x0010 Under-Voltage above Voltage level - Under-Voltage Level - Voltage Level

VRed1 < LoRB 0x0020 Voltage Reduction 1 below Low Runback Limit

- Voltage Reduction 1 - Low Runback Level

VRed1 < UV 0x0040 Voltage Reduction 1 below Under-Voltage level

- Voltage Reduction 1 - Under-Voltage Level









CHAPTER 4: ACTUAL VALUES A4 TARGET MESSAGES


If the Setting Error was produced when in “Disabled” mode (control PB Disable/Enable set the VR to “Disabled”), no block is applied, and the “Alarm” LED turns on. The VR operation block will be applied when VR control is Enabled:

• When in Auto/Remote mode, the block is applied to all auto functions. The VR display will show the error message, and the "Alarm” LEDs will turn on.

• When in Manual mode, the block affects only the Over-Voltage and the Under-Voltage settings. The VR displays the error message, and turns on the “Alarm” LED.

Error messages can be reset only upon correcting the settings causing the errors Error Message example:The VR displays an Error Message in the following format until the error is corrected:


A4 TARGET MESSAGES CHAPTER 4: ACTUAL VALUES



Chapter 5: Settings

Digital Energy

Settings

S1 Product setup

The main Product Setup menu is shown below:


S1 PRODUCT SETUP CHAPTER 5: SETTINGS

Figure 1: Product setup menu

S1 PASSWORD SECURITY

LOC SETPOINTS PSWD

LOC CONTROLS PSWD

S1 CLOCK SETUP

DATE (MM/DD/YYYY)

TIME (HH:MM:SS)

DLS ENABLE

DLS START MONTH

DLS START WEEK

DLS END MONTH

DLS END WEEK

DLS START WEEKDAY

DLS END WEEKDAY

▼

S1 PRODUCT SETUP

CLOCK SETUP

PASSWORD SECURITY

COMMUNICATIONS

EVENT RECORDER

DATA LOGGER

FRONT PANEL

INSTALLATION

▼

891964.cdr

S1 COMMUNICATIONS

RS485

MODBUS

DNP

S1 EVENT RECORDER

PICKUP EVENTS

TRIP EVENTS

ALARM EVENTS

CONTROL EVENTS

DROPOUT EVENTS

CONTACT INPUTS

VIRTUAL INPUTS

VIRTUAL OUTPUTS

SETTING DATE/TIME

▼

S1 FRONT PANEL

MESSAGE TIMEOUT

SCREEN SAVER

FLASH MESSAGE TIME

▼

S1 INSTALLATION

PRODUCT NAME

PRODUCT STATUS

▼

S1 DATA LOGGER

CONTINUOUS MODE

TRIGGER POSITION

SAMPLE RATE

DATA LOG TRGR SRC

CHANNEL 1

...

CHANNEL 10

▼

S1 RS485

RS485 BAUD RATE

PARITY

REAR RS485 PORT

COMM FAIL ALARM

▼

S1 MODBUS

MODBUS SLAVE ADR

S1 DNP

DNP GENERAL

DEFAULT VARIATION

DNP POINTS LIST

S1 DNP GENERAL

DNP ADDRESS

TIME SYNC IN PER

DNP MSG FRAG SIZE

▼

S1 DNP POINTS LIST

BINARY INPUTS

BINARY OUTPUTS

ANALOG INPUTS

S1 DEFAULT VARIATION

DNP OBJECT 1

DNP OBJECT 2

DNP OBJECT 20

DNP OBJECT 21

DNP OBJECT 22

DNP OBJECT 23

DNP OBJECT 30

DNP OBJECT 32

▼

S1 BINARY INPUTS

POINT 0

...

POINT 63

▼

S1 BINARY OUTPUTS

POINT 0 ON

POINT 0 OFF

...

POINT 15 ON

POINT 15 OFF

▼

S1 BINARY OUTPUTS

POINT 0 ENTRY

POINT 0 SCALE FCTR

POINT 0 DEADBAND

...

POINT 31 ENTRY

POINT 31 SCALE FCTR

POINT 31 DEADBAND

▼

CHAPTER 5: SETTINGS S1 PRODUCT SETUP


ClockThe Multilin DGCV has an internal real time clock that performs time stamping for various features such as the event and transient recorders. Time synchronization priority uses Modbus or DNP commands as follows:Synchronization commands are all eventually translated into a MODBUS function, and as such are blocked from the MODBUS layer as required.There is no prioritization amongst synchronization commands. A synchronization command issued from DNP for example, can be directly followed by another from MODBUS, for example.PATH: SETPOINTS > S1 PRODUCT SETUP > CLOCK

DATE: (MM/DD/YYYY)

Range: Month: Jan, Feb, Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov, Dec Day: 1 to 31 Year: 2009 to 2099Default: Jan 15 2009

This setting sets the date in the specified format.

TIME: (HH:MM:SS)

Range: 0 to 23: 0 to 59: 0 to59Default: 03:15:50

This setting sets the time in the specified format.

DLS ENABLE

Range: Disabled, EnabledDefault: Disabled

With DLS Enabled, the main CPU has to maintain the information regarding AV.m_DaylightSavingsActive, because it is necessary in the comms CPU to translate from localtime to UTC in 61850 protocol. In addition, if SNTP is enabled, the main CPU will receive UTC time from comms CPU and it needs to apply this in order to pass it to localtime.

Without any other synchronization, DLS correction is applied only at 0200 hours on daylight saving months.

PATH: SETPOINTS > S1 PRODUCT SETUP > CLOCK > DLS ENABLE [ENABLED]

DLS START MONTH:

Range: Not Set, January, February, March, April, May, June, July, August, September, October, November, DecemberDefault: Not Set

This setting sets the month for the DLS start time.

DLS START WEEK:

Range: Not Set, 1st, 2nd, 3rd, 4th, LastDefault: Not Set

This setting sets the week of the month for the DLS start time.

DLS START WEEKDAY:

Range: Not Set, Mon, Tue, Wed, Thu, Fri, Sat, SunDefault: Not Set

This setting sets the weekday for the DLS start time.

DLS END MONTH:

Range: Not Set, January, February, March, April, May, June, July, August, September, October, November, DecemberDefault: Not Set

This setting sets the month for the end of the DLS time.



DLS END WEEK:

Range: Not Set, 1st, 2nd, 3rd, 4th, LastDefault: Not Set

This setting sets the week of the month for the end of the DLS time.

DLS END WEEKDAY:

Range: Not Set, Mon, Tue, Wed, Thu, Fri, Sat, SunDefault: Not Set

This setting sets the weekday for the end of the DLS time.

Password securityPassword security features are designed into the relay to provide protection against unauthorized setpoint changes and control. The relay has programmable passwords for both Local and Remote access, which can be used to allow setpoint changes and command execution from both the front panel and the communications ports. These passwords consist of 3 to 10 alphanumeric characters. The Local and the Remote passwords are initially set after entering in a Master Reset Password (MRP). The Master Reset Password (MRP) is set to “NULL” when the relay is shipped from the factory. When the MRP is programmed to “NULL” all password security is disabled.. The remote user may choose to allow the local user to change the local passwords.Each interface (RS485, USB, and front panel keypad) is independent of one another, meaning that enabling setpoint access on one interface does not enable access for any of the other interfaces (i.e., the password must be explicitly entered via the interface from which access is desired).The EnerVista DGCV Setup software incorporates a facility for programming the relay’s passwords as well as enabling/disabling setpoint access. For example, when an attempt is made to modify a setpoint but access is restricted, the program will prompt the user to enter the password and send it to the relay before the setpoint can actually be written to the relay. If a SCADA system is used for relay programming, it is up to the programmer to incorporate appropriate security for the application.Aside from being logged out of security, which allows the user to read setpoints and actual values only, three levels of security access are provided: Setpoint Level, Control Level, and Master Level. The Setpoint and Control Levels can be attained either locally using the Local passwords (USB port and keypad), or remotely using the Remote passwords (RS485 port). The user can have either Setpoint or Control Level active, but not both simultaneously from the same interface. The Master Level is used for setting and resetting of passwords, and includes all Setpoint and Control Level access rights. The Master Level cannot be attained from the keypad. The Master Reset Password must be 8 to 10 characters in length, and must contain at least 2 letters and 2 numbers. The Master Level can define whether the local user is permitted to change Local Passwords without having to enter the Master Level. The Master Reset Password is encrypted, and is not viewable from the keypad. If the Master Reset Password is lost, the user should contact the factory to decrypt the Master Reset Password.After password entry, the access level is maintained until a period of 5 minutes of inactivity has elapsed, after which the password must be re-entered. A power-loss or entering in the wrong password will log the user out of security.Further definition of the access levels is described as follows:SETPOINT LEVEL

• Changing settings under QUICK SETUP menu

• Changing settings under the SETPOINTS menu except the features requiring control access listed below



• Changing any setting under MAINTENANCE such as trip and close coil monitoring and breaker maintenance settings, except the features requiring control access listed below

• Changing the Local or Remote Setpoint Password, depending on the interface being accessed

CONTROL LEVEL

• Reset command

• Open and Close Breaker commands

• Virtual Input commands

• Clearing of event records, transient records, and other data

• Uploading new firmware

• Changing the Local or Remote Control Password, depending on the interface being accessed

MASTER LEVEL

• Setting and changing of all passwords including the Master Reset Password

• Disabling password security

• All Setpoint and Control Level access rights

For details on Password Security setup and handling using the EnerVista Setup software, refer to Chapter 3.

CommunicationsFigure 2: Main Communications menu

RS485 interface The Multilin DGCV is equipped with one serial RS485 communication port. The RS485 port has settings for baud rate and parity. It is important that these parameters agree with the settings used on the computer or other equipment that is connected to these ports. This port may be connected to a computer running the EnerVista DGCV Setup software. This software can download and upload setting files, view measured parameters, and upgrade the device firmware. A maximum of 32 -series devices can be daisy-chained and connected to a DCS, PLC, or PC using the RS485 port.Select the Settings > Communications > Serial Ports menu item in the program, or the SETPOINTS > S1 PRODUCT SETUP > COMMUNICATIONS > RS485 path on the display, to configure the serial port.

S1 RS485

RS485 BAUD RATE

PARITY

REAR 485 PORT

COMM FAIL ALARM

▼

S1 COMMUNICATIONS

RS485

MODBUS

DNP

891746.cdr

S1 MODBUS PROTOCOL

MODBUS SLAVE ADR

S1 DNP

DNP GENERAL

DEFAULT VARIATION

DNP POINTS LIST

▼



Figure 3: Serial port configuration settings

The following settings are available to configure the RS485 port.

BAUD RATE

Range: 9600, 19200, 38400, 57600, 115200Default: 115200

This setting specifies the baud rate (bits per second) for the RS485 port.

PARITY

Range: None, Odd, EvenDefault: None

This setting specifies the parity for the RS485 port.

Modbus The Modicon Modbus protocol is supported by the Multilin DGCV . Modbus is available via the RS485 serial link (Modbus RTU). The always acts as a slave device, meaning that it never initiates communications; it only listens and responds to requests issued by a master device. A subset of the Modbus protocol format is supported that allows extensive monitoring, programming, and control functions using read and write register commands. Refer to the Multilin DGCV Communications Guide for additional details on the Modbus protocol and the Modbus memory map.The Modbus server can simultaneously support two clients over serial RS485. The server is capable of reporting any indication or measurement and operating any output present in the device. A user-configurable input and output map is also implemented.The operates as a Modbus slave device onlySelect the Settings > Communications > Modbus > Protocol menu item in software, or the SETPOINTS > S1 PRODUCT SETUP > COMMUNICATIONS > MODBUS PROTOCOL path to set up the modbus protocol as shown below.

Figure 4: Modbus protocol configuration settings

The following Modbus settings are available:

MODBUS SLAVE ADDRESS

Range: 1 to 254 in steps of 1Default: 254

This setting specifies the Modbus slave address . Each device must have a unique address from 1 to 254. Address 0 is the broadcast address to which all Modbus slave devices listen. Addresses do not have to be sequential, but no two devices can have the same address or conflicts resulting in errors will occur. Generally, each device added to the link should use the next higher address starting at 1.

Please refer to the Multilin DGCV Communications Guide for details on how to set up the Modbus communications protocol.



DNP communication The menu structure for the DNP protocol is shown below.PATH: SETPOINTS > PRODUCT SETUP > COMMUNICATIONS > DNP

Figure 5: DNP communication settings menu

The following table, from the Multilin DGCV Communications Guide, shows the list of DNP Binary Inputs.

S1 DNP GENERAL

DNP ADDRESS

DNP TCP/UDP PORT

TME SYNC IIN PER.

DNP MSG FRAG SIZE

▼

S1 DNP

DNP GENERAL

DEFAULT VARIATION

DNP POINTS LIST

891743.cdr

POINT 0

...

POINT 1

POINT 2

POINT 63

▼

S1 DNP POINTS LIST

BINARY INPUTS

BINARY OUTPUT

ANALOG INPUTS

POINT 0 ENTRY

...

POINT 0 SCALE FCTR

POINT 0 DEADBAND

POINT 31 ENTRY

POINT 31 SCALE FCTR

POINT 31 DEADBAND

▼

POINT 0 ON

...

POINT 0 OFF

POINT 1 ON

POINT 1 OFF

POINT 15 ON

POINT 15 OFF

▼

DEFAULT VARIATION

DNP OBJECT 1

DNP OBJECT 2

DNP OBJECT 20

DNP OBJECT 21

DNP OBJECT 22

DNP OBJECT 23

DNP OBJECT 30

DNP OBJECT 32

Code Type Definition

FC134B unsigned 16 bits DNP Binary Inputs

0 Off

0x0040 Contact IN 1 On










0x004A Contact IN 11 On

0x004B Contact IN 12 On

0x004C Contact IN 13 On

0x004D Contact IN 14 On

0x004E Contact IN 15 On



0x004F Contact IN 16 On



0x0060 Contact IN 1 Off










0x006A Contact IN 11 Off

0x006B Contact IN 12 Off

0x006C Contact IN 13 Off

0x006D Contact IN 14 Off

0x006E Contact IN 15 Off

0x006F Contact IN 16 Off



0x0080 Virtual IN 1 On










0x008A Virtual IN 11 On

0x008B Virtual IN 12 On

0x008C Virtual IN 13 On

0x008D Virtual IN 14 On

0x008E Virtual IN 15 On

0x008F Virtual IN 16 On














0x009A Virtual IN 27 On

0x009B Virtual IN 28 On

0x009C Virtual IN 29 On

0x009D Virtual IN 30 On

0x009E Virtual IN 31 On

0x009F Virtual IN 32 On

0x00A0 Virtual IN 1 Off










0x00AA Virtual IN 11 Off

0x00AB Virtual IN 12 Off

0x00AC Virtual IN 13 Off

0x00AD Virtual IN 14 Off

0x00AE Virtual IN 15 Off

0x00AF Virtual IN 16 Off

0x00B0 Virtual IN 17 Off










0x00BA Virtual IN 27 Off

0x00BB Virtual IN 28 Off

0x00BC Virtual IN 29 Off

0x00BD Virtual IN 30 Off

0x00BE Virtual IN 31 Off

0x00BF Virtual IN 32 Off

0x00C0 Virtual OUT 1 On













0x00CA Virtual OUT 11 On

0x00CB Virtual OUT 12 On

0x00CC Virtual OUT 13 On

0x00CD Virtual OUT 14 On

0x00CE Virtual OUT 15 On

0x00CF Virtual OUT 16 On

0x00D0 Virtual OUT 17 On










0x00DA Virtual OUT 27 On

0x00DB Virtual OUT 28 On

0x00DC Virtual OUT 29 On

0x00DD Virtual OUT 30 On

0x00DE Virtual OUT 31 On

0x00DF Virtual OUT 32 On

0x00E0 Virtual OUT 1 Off










0x00EA Virtual OUT 11 Off

0x00EB Virtual OUT 12 Off

0x00EC Virtual OUT 13 Off

0x00ED Virtual OUT 14 Off

0x00EE Virtual OUT 15 Off

0x00EF Virtual OUT 16 Off

0x00F0 Virtual OUT 17 Off













0x00FA Virtual OUT 27 Off

0x00FB Virtual OUT 28 Off

0x00FC Virtual OUT 29 Off

0x00FD Virtual OUT 30 Off

0x00FE Virtual OUT 31 Off

0x00FF Virtual OUT 32 Off

0x0100 Contact OUT 1 On










0x010A Contact OUT 11 On

0x010B Contact OUT 12 On

0x010C Contact OUT 13 On

0x010D Contact OUT 14 On

0x0120 Contact OUT 1 Off










0x012A Contact OUT 11 Off

0x012B Contact OUT 12 Off

0x012C Contact OUT 13 Off

0x012D Contact OUT 14 Off

0xA002 Any Alarm OP

0xA482 Not Configured

0xA9C2 Max Tap/Day OP

0xA9C4 Max Tap/Day DPO

0xAA02 Max Taps Total OP

0xAA04 Max Taps Total DPO

0xAB02 Out Of Band OP

0xAB04 Out Of Band DPO

0xAB42 Min Tap Alarm OP

0xAB44 Min Tap Alarm DPO

0xAB82 Max Tap Alarm OP




0xAB84 Max Tap Alarm DPO

0xAC42 Self Test Alrm OP

0xAC82 Comm Fail Alrm OP

0xC002 Any Inhibit OP

0xC602 Auto/Rem Tap Raise

0xC642 Manual Tap Raise

0xC682 Auto/Rem Tap Lower

0xC6C2 Manual Tap Lower

0xC841 OV Auto Inhib. PKP

0xC842 OV Auto Inhib. OP

0xC844 OV Auto Inhib. DPO

0xC881 OV Man Inhibit PKP

0xC882 OV Man Inhibit OP

0xC884 OV Man Inhibit DPO

0xC8C1 UV Auto Inhib. PKP

0xC8C2 UV Auto Inhib. OP

0xC8C4 UV Auto Inhib. DPO

0xC901 UV Man Inhibit PKP

0xC902 UV Man Inhibit OP

0xC904 UV Man Inhibit DPO

0xC941 OC Auto Inhib. PKP

0xC942 OC Auto Inhib. OP

0xC944 OC Auto Inhib. DPO

0xC981 OC Man Inhibit PKP

0xC982 OC Man Inhibit OP

0xC984 OC Man Inhibit DPO

0xCB82 Rev Pwr Reg OP

0xCB84 Rev Pwr Reg DPO

0xCBC2 Rev Pwr Block OP

0xCBC4 Rev Pwr Block DPO

0xCC02 Rev Pwr To Ntl OP

0xCC04 Rev Pwr To Ntl DPO

0xCD42 Group 1 Active OP

0xCD44 Group 1 Active DPO

0xCD82 Group 2 Active OP

0xCD84 Group 2 Active DPO

0xCDC2 Group 3 Active OP

0xCDC4 Group 3 Active DPO

0xCF02 Auto/Remote

0xCF42 Manual

0xD182 High V Runback OP

0xD184 High V Runback DPO

0xD1C2 Low V Runback OP

0xD1C4 Low V Runback DPO

0xD201 Reverse Power PKP

0xD202 Reverse Power OP

0xD204 Reverse Power DPO




Event recorderThe Event Recorder runs continuously, capturing and storing the last 256 events. All events are stored in a non-volatile memory where the information is maintained for up to 3 days in case of lost Multilin DGCV control power. PATH: SETPOINTS > S1 PRODUCT SETUP > EVENT RECORDER

PICKUP EVENTS


When set to “Enabled”, the event recorder records the events that occur when a protection element picks up.

DROPOUT EVENTS


When set to “Enabled” the event recorder records the dropout state of a protection element.

ALARM EVENTS

Range: Disabled, EnabledDefault: Enabled

These events include the elements programmed as an “ALARM” or “LATCHED ALARM” function, which detect power system conditions considered as an alarm.

CONTROL EVENTS


If set to “Enabled”, the event recorder records events caused by the performance of the programmed control elements.

CONTACT INPUTS


When set to “Enabled”, the event recorder will record the event when a contact input changes its state.

0xD242 Volt Reduct. 1 OP

0xD244 Volt Reduct. 1 DPO

0xD282 Volt Reduct. 2 OP

0xD284 Volt Reduct. 2 DPO

0xD2C2 Volt Reduct. 3 OP

0xD2C4 Volt Reduct. 3 DPO

0xD4C2 Unsuc Tap Chge OP

0xD4C4 Unsuc Tap Chge DPO

0xD502 Incomp Tap Seq OP

0xD504 Incomp Tap Seq DPO

0xE882 Grp Change Blk OP

0xE884 Grp Change Blk DPO

0xEE02 Tap Chg Inhib OP

0xEE04 Tap Chg Inhib DPO




VIRTUAL INPUTS


When set to “Enabled”, the event recorder records the events which occur upon state changes of any virtual input.

VIRTUAL OUTPUTS


When set to “Enabled”, the event recorder records the events which occur upon state changes of any virtual output.

SETTING DATE/TIME


When set to “Enabled” the Event Recorder records the events which occur upon Date and/or Time settings made by the user.

DataloggerThe following setpoints are available:

SAMPLE RATE

Range: 1 min, 5 min, 10 min, 15 min, 30 min, 60 min, DisableDefault: 1 min

Determines how often data is stored in the data log.

CONTINUOUS MODE


Determines whether or not the trigger data is overwritten with new data. Enabled will overwrite the previous trigger data with new trigger data. When Disabled, the data log will run until filled with 256 samples. Continuous Mode should be used when the data is stored externally by a polling system. The sample rate should be chosen to match the poll rate of the external program.

TRIGGER POSITION

Range: 0 to 100% steps of 1%Default: 25%

Percentage of the sample buffer used for pretrigger samples.

DATA LOG TRIG SRC

Range: Command, VO1 to VO32, Any Trip Pickup, Any Trip, Any Trip Dropout, Any Alarm Pickup, Any Alarm, Any Alarm DropoutDefault: Command

Selects a trigger source. Command is always active. Logic Elements can be used to create combinations of trigger sources.

CHANNEL 1 SOURCE

Range: Disabled, Phase A Current, Phase B Current, Phase C Current, Average Phase Current, Motor Load, Current Unbalance, Ground Current, System Frequency, Vab, Vbc, Vca, Van, Vbn, Vcn, Power Factor, Real Power (kW), Reactive Power (kvar), Apparent Power



(kVA), Positive Watthours, Positive Varhours, Hottest Stator RTD, Thermal Capacity Used, RTD #1, RTD #2, RTD #3, RTD #4, RTD #5, RTD #6, RTD #7, RTD #8, RTD #9, RTD #10, RTD #11, RTD #12Default: Disabled

Selects the data to be stored for each sample of the data log channel.

NOTE

NOTE: Sources and Defaults for Channels 2 to 10 are the same as those for Channel 1.

Front panelThe user can send a message to the display, that will override any normal message by sending text through Modbus.PATH: SETPOINTS > S1 PRODUCT SETUP > FRONT PANEL

FLASH MESSAGE TIME

Range: 1 s to 65535 sDefault: 5 s

Flash messages are status, warning, error, or information messages displayed for several seconds in response to certain key presses during setting programming. These messages override any normal messages. The duration of a flash message on the display can be changed to accommodate different reading rates.

MESSAGE TIMEOUT

Range: 1 s to 65535 sDefault: 30 s

If the keypad is inactive for a period of time, the relay automatically reverts to a default message. The inactivity time is modified via this setting to ensure messages remain on the screen long enough during programming or reading of actual values.

SCREEN SAVER

Range: Off, 1 min to 10000 minDefault: Off

The life of the LCD backlight can be prolonged by enabling the Screen Saver mode.

If the keypad is inactive for the selected period of time, the Multilin DGCV automatically shuts off the LCD screen. Any activity (keypress, alarm, trip, or target message) will restore screen messages.

InstallationPATH: SETPOINTS > S1 PRODUCT SETUP > INSTALLATION

PRODUCT NAME

Range: Product Name, Alpha-numeric (18 characters)Default: DGC Name

The PRODUCT NAME setting allows the user to uniquely identify a Multilin DGCV unit. This name will appear on generated reports. This name is also used to identify specific devices which are engaged in automatically sending/receiving data over the communications channel.

PRODUCT STATUS

Range: Not Ready, ReadyDefault: Not Ready

Allows the user to activate/deactivate the Multilin DGCV . The Multilin DGCV is not operational when set to "Not Ready."


S2 SYSTEM SETUP CHAPTER 5: SETTINGS

S2 System setup

The Voltage Regulator can be connected to any available pair of voltage and current inputs, or to three-phase currents and voltage inputs, all programmable through the Current and Voltage Sensing menus. During normal loading conditions the transformer three phase currents and voltages are balanced. The power computation from the VR connected to a single-phase current and single-phase voltage is calculated by extrapolating the single-phase power to three-phase power measurement.

Figure 6: System setup menu

The following AC inputs need to be configured:

S2 SYSTEM SETUP

CURRENT SENSING

VOLTAGE SENSING

POWER SYSTEM

TAP CHANGER

TAP SENSING

▼

891965.cdr

S2 TAP CHANGER

LTC NUMBER OF TAPS

LTC NEUTRAL TAP

LTC TIME DELAY

LTC INHIBIT INPUT

MAX TAPS / DAY

MAX TAPS TOTAL

▼

S2 CURRENT SENSING

CURRENT INPUT

PHASE CT PRIMARY

PHASE CT SECONDARY

GND CT PRIMARY

GND CT SECONDARY

▼

S2 VOLTAGE SENSING

VOLTAGE INPUT

VT RATIO

VT SECONDARY

VT CALIBRATION

▼

S2 POWER SYSTEM

SYSTEM ROTATION

NOMINAL FREQUENCY

▼

S2 TAP SENSING

BCD BIT 1 INPUT

...

BCD BIT 6 INPUT

▼

CHAPTER 5: SETTINGS S2 SYSTEM SETUP


Current sensingPATH: SETPOINTS > S2 SYSTEM SETUP > S2 CURRENT SENSING

CT PRIMARY

Range: 1 A or 5 A: 1 to 6000 A in steps of 1 ARange: 0.2 A: 1 to 400 A in steps of 1 ADefault: 1 A

This setpoint defines the ratio of the rated primary and secondary currents of the connected current transformer. The range of CT primary setting depends on the current transformer specified at the time of Multilin DGCV ordering.

NOTE

NOTE: The maximum CT primary current for the Multilin DGCV ordered for current sensing of 0.2 A does not exceed 400 A.

Voltage sensingPATH: SETPOINTS > S2 SYSTEM SETUP > S2 VOLTAGE SENSING

VT INPUT - 0.2 A CT

Range: Line-to-Ground, Line-to-LineDefault: Line-to-Ground

For Multilin DGCV orders with 0.2 A CT, this setpoint provides a setting selection of either Line-To-Ground, or Line-To-Line.

VT INPUT - 1 A to 5 A CT

Range: Line-to-Ground, Line-to-Line, Wye, DeltaDefault: Wye

For Multilin DGCV orders with 1 A to 5 A CT, this setpoint provides a setting selection of Line-To-Ground, Line-To-Line, Wye, or Delta.

VT RATIO

Range: 1 to 600 in steps of 1Default: 1:1

This setting specifies the ratio between the primary and the secondary voltages of the connected Voltage Transformer.

VT SECONDARY

Range: 60 to 250 V in steps of 1 VDefault: 120 V

This setting specifies the nominal secondary voltage of the voltage transformer as connected to the controller.

VT CALIBRATION

Range: 0.950 to 1.050 in steps of 0.001Default: 1.000

This setpoint allows the user to calibrate the voltage channel and obtain better accuracy at the working voltage.

The calculated RMS voltage is multiplied by this factor. A maximum deviation of ±5% is allowed.



Power systemPATH: SETPOINTS > S2 SYSTEM SETUP > POWER SYSTEM

SYSTEM ROTATION

Range: ABC, ACBDefault: ABC

This setting defines the phase rotation of the (3-Phase) power system.

VT/CT PHASING

Range: 0° to -330° in steps of -30°Default: 0°

This setting specifies the angle by which the current lags the voltage.

Refer to A2 METERING \ POWER CALCULATION for power calculation based on VT/CT phasing and the type of Multilin DGCV ordered.

NOMINAL FREQUENCY

Range: 50 Hz, 60 HzDefault: 60 Hz

This setting defines the frequency of the power system.

Tap changerPATH: SETPOINTS > S2 SYSTEM SETUP > S2 TAP CHANGER

TAP MAX

Range: 0 to +39 in steps of 1Default: +16

This setting defines the maximum tap limit for the controlled tap changer. The Multilin DGCV uses this setting to signal when the maximum tap is reached, and to block any further RAISE TAP commands.

TAP MIN

Range: -19 to +35 in steps of 1Default: -16

This setting defines the minimum tap limit for the controlled tap changer. The Voltage Regulator uses this setting to signal when the minimum tap is reached, and to block further LOWER TAP change commands.

TIME DELAY

Range: 0.0 to 300.0 sec in steps of 0.1 secDefault: 1.0 sec

The Transformer Tap changer switches from one tap to another with some time delay. This setting defines the time that it takes to change from one tap position to the next.

INHIBIT INPUT

Range: Off, Contact Inputs 1 to x, Virtual Input 1 to 32, Virtual Output 1 to 32Default: Off

This setting indicates the input used to inhibit the operation of the tap changer upon energizing.

MAX TAPS/DAY

Range: Off, 1 to 100 in steps of 1Default: 10

This is the maximum number of tap operations per day before an alarm occurs.



MAX TAPS TOTAL

Range: Off, 1 to 10000 in steps of 1Default: 1000

This is the maximum number of tap operations in total before an alarm occurs.

MAX/MIN LIMITS


This setting enables or disables the application of the programmed TAP MAX and TAP MIN to be used as limits for the tap changer.

Tap sensingPOSITION SWITCHPATH: SETPOINTS > S2 SYSTEM SETUP > S2 TAP SENSING

TAP TRACKING

Range: Position Switch, BCDDefault: Position Switch

This setpoint shows the type for tap position detection.

With “Position Switch” selected under the Tap Tracking setting, the physical position switch that resides within the tap position indicator should be wired to the analog input labeled as 5 and 6 from the first IO_C card. This method of tap position detection requires also, that the neutral tap switch residing in the tap changer mechanism be wired to the neutral tap digital input from the controller.

When a pulse from the wired tap position switch is detected, the controller updates the tap position by moving one tap up or one tap down, depending on the direction of the issued command.

The neutral contact is fully programmable as per the following setpoint:

NTRL TAP INPUT

Range: Off, Contact Inputs 1 to xDefault: Off

This setting configures the digital input to detect the neutral tap position. Some step voltage regulators indicate the neutral tap position by an external contact. When the position switch is chosen as tap tracking method this input is the only mechanism to detect the neutral tap.

The “Position Switch” tap tracking method is based on two actions; one is the command sent to either the “Raise Tap”, or “Lower Tap” contact output, and the other is the pulse feedback from the position switch, that reflects the change of the tap position. The issued command contributes to detection of tap position direction, where the detected pulse feedback from the tap position switch is used to confirm the change.

With the “Position switch” tap tracking’ method, the closing of the tap changer neutral switch is also used to re-calibrate/re-synchronize the controller’s tap position.

BCD

TAP TRACKING

Range: Position Switch, BCDDefault: BCD

This specifies the BCD (Binary Coded Decimal) setpoint used for tap position monitoring.



NEUTRAL TAP

Range: -17 to +37Default: 0

This setting defines the neutral tap position on the controller. The “Neutral Tap” reflects the tap changer neutral tap as detected by BCD. The Neutral Tap LED will turn on when the tap changer is at neutral tap.

NOTE

NOTE: For BCD selection, the neutral tap must be programmed in order to provide the location of the neutral tap position.

To configure the BCD decoder inputs into an IO_C card the BCD BIT x INPUT settings must be programmed. These six settings are located under SETPOINTS/SYSTEM SETUP/TAP SENSING option menu. With four BCD bits programmed, only 9 tap positions can be detected. Five BCD bits programmed can be used for detection of up to 19 tap positions. With all 6 BCD bits programmed, the VR can detect up to 39 tap positions.

The physical connection between the output BCD decoder and the IO_C card is shown below:

BCD BIT 1 to 5 INPUT

Range: Off, Contact Inputs 1 to x, Virtual Input 1 to 32, Virtual Output 1 to 32 Default: Off

The six BCD inputs require selection of contact inputs, virtual inputs, or virtual outputs. The tap position is detected by the state combination of high/low bits received from the tap changer mechanism.

BCD BIT 6 INPUT

Range: Off, Contact Inputs 1 to x, Virtual Input 1 to 32, Virtual Output 1 to 32 Default: Off

This input provides the configuration of the BCD Bit 6 input. The tap position provided by the transformer can be either positive from 1 to 39, or positive and negative from -19 to 19.

BCD BIT 6 input provides the configuration of the positive BCD BIT 6 or the sign (-) of the BCD code.

The selection of BCD BIT 6 working mode is made according to the TAP MIN setting.

When the TAP MIN setpoint is configured with a negative value, the BCD BIT 6 will provide the sign (-) of the BCD. Hence, the maximum range for BCD tap detection of negative and positive taps goes from -19 to +19.

When, TAP MIN setting is positive, the BCD BIT 6 INPUT provides the BCD 20 code. As a result, the full BCD range goes from 1 to 39.

The selection of a suitable setting depends on the user’s criteria. In both cases, when the BCD format is chosen, the neutral tap position must be entered.



Figure 7: Connection Diagram - BDC decoder to IO_C card (up to 19 taps)

BCD inputs are coded in the following way:

• +Tap – means a positive tap has been programmed under MIN TAP setting.

• -Tap – means a negative tap has been programmed under MIN TAP setting.

MIN TAP BCD bit 6 Input

BCD bit 5 Input

BCD bit 4 Input

BCD bit 3 Input

BCD bit 2 Input

BCD bit 1 Input

TAP Position

+Tap 0 0 0 0 0 0 0

+Tap 0 0 0 0 0 1 1

+Tap 0 0 0 0 1 0 2

+Tap 0 0 0 0 1 1 3

+Tap 0 0 0 1 0 0 4

+Tap 0 0 0 1 0 1 5

+Tap 0 0 0 1 1 0 6

+Tap 0 0 0 1 1 1 7

+Tap 0 0 1 0 0 0 8

+Tap 0 0 1 0 0 1 9

+Tap 0 0 1 0 1 0 invalid









BCD bit 5 Input

BCD bit 4 Input

BCD bit 3 Input

BCD bit 2 Input

BCD bit 1 Input

TAP Position

+Tap 0 1 0 0 0 0 10

+Tap 0 1 0 0 0 1 11

+Tap 0 1 0 0 1 0 12

+Tap 0 1 0 0 1 1 13

+Tap 0 1 0 1 0 0 14

+Tap 0 1 0 1 0 1 15

+Tap 0 1 0 1 1 0 16

+Tap 0 1 0 1 1 1 17

+Tap 0 1 1 0 0 0 18

+Tap 0 1 1 0 0 1 19








BCD bit 5 Input

BCD bit 4 Input

BCD bit 3 Input

BCD bit 2 Input

BCD bit 1 Input

TAP Position

+Tap 1 0 0 0 0 0 20

+Tap 1 0 0 0 0 1 21

+Tap 1 0 0 0 1 0 22

+Tap 1 0 0 0 1 1 23

+Tap 1 0 0 1 0 0 24

+Tap 1 0 0 1 0 1 25

+Tap 1 0 0 1 1 0 26

+Tap 1 0 0 1 1 1 27

+Tap 1 0 1 0 0 0 28

+Tap 1 0 1 0 0 1 29










BCD bit 5 Input

BCD bit 4 Input

BCD bit 3 Input

BCD bit 2 Input

BCD bit 1 Input

TAP Position

+Tap 1 1 0 0 0 0 30

+Tap 1 1 0 0 0 1 31

+Tap 1 1 0 0 1 0 32

+Tap 1 1 0 0 1 1 33

+Tap 1 1 0 1 0 0 34

+Tap 1 1 0 1 0 1 35

+Tap 1 1 0 1 1 0 36

+Tap 1 1 0 1 1 1 37

+Tap 1 1 1 0 0 0 38

+Tap 1 1 1 0 0 1 39







... ... ... ... ... ... ... ...

-Tap 0 0 0 0 0 1 -1

-Tap 0 0 0 0 0 0 0

-Tap 1 0 0 0 0 0 0

-Tap 1 0 0 0 0 1 -1

-Tap 1 0 0 0 1 0 -2

... ... ... ... ... ... ... ...

-Tap 1 1 1 0 0 1 -19


S3 VOLTAGE REGULATOR CHAPTER 5: SETTINGS

S3 Voltage regulator

Figure 8: Voltage Regulator and Controls menu

VOLTAGE LEVEL (BANDCENTER)The Voltage Level defines the desired level of voltage to be held at the load side of the power transformer. In many cases this voltage level is set to a 120 V secondary value that corresponds to the desired primary voltage from the transformer load side. It is commonly required that the voltage at the load be held in the range of 114 V to 126 V, although the

S3 VOLT REGULATOR

SETPOINT GROUP 1

SETPOINT GROUP 2

SETPOINT GROUP 3

SETPOINTS

S1 PRODUCT SETUP

S2 SYSTEM SETUP

S3 VOLT REGULATOR

S4 CONTROLS

S5 INPUTS/OUTPUTS

▼

S3 SETPOINT GROUP 1,2,3

MAIN REGULATION

VOLT RUNBCK LIMITS

VOLTAGE REDUCTION

INHIBIT FUNCTIONS

POWER OVERRIDE

▼

S4 REMOTE CONTROL

REMOTE RAISE TAP

REMOTE LOWER TAP

▼

891957.cdr

S4 CHANGE SETP GROUP

SET GROUP 2 ACTIVE

BLK GROUP CHANGE

SET GROUP 3 ACTIVE

▼

S4 VIRTUAL INPUTS

VIRTUAL INPUT 1

...

VIRTUAL INPUT 2

VIRTUAL INPUT 32

▼

S4

RESET

REMOTE RST/DH RST

S3 MAIN REGULATION

VOLTAGE LEVEL

BANDWIDTH

REGULATION TYPE

COMPUTATION MODE

COMPUTATION DELAY

OPERATION MODE

LDC RESISTIVE R

LDC INDUCTIVE X

▼

S3 VOLTAGE RUNBCK LIMITS

HIGH V RUNBCK LIMT

LOW V RUNBCK LIMT

▼

S3 VOLTAGE REDUCTION

VOLT REDUCTION 1

VOLT REDUC 1 INPUT

VOLT REDUCTION 2

VOLT REDUC 2 INPUT

VOLT REDUCTION 3

VOLT REDUC 3 INPUT

▼

S3 POWER OVERRIDE

POWER OP MODE

REV PWR DETECTION

REVERSE PWR DELAY

REVERSE PWR LDC R

REVERSE PWR LDC X

▼

S3 INHIBIT FUNCTIONS

PH OC FUNCTION

PH OC PKP

PH OC DELAY

PH OV FUNCTION

PH OV PKP

PH OV DELAY

PH UV FUNCTION

PH UV PKP

PH UV DELAY

▼

S4 CONTROLS

REMOTE CONTROL

CHANGE SETP GROUP

VIRTUAL INPUTS

REMOTE RST/DH RST

▼

CHAPTER 5: SETTINGS S3 VOLTAGE REGULATOR


voltage level setting range provides for selecting an even higher voltage difference. The actual load is usually at a distance from the transformer, in which case the electrical distance to the load is defined by the line drop compensation (LDC) settings.VOLTAGE BANDWIDTHDue to the variations in the loads connected to the transformer, the transformer output voltage also varies. Two or three criteria apply to this fluctuation:

• acceptable voltage fluctuation levels when the voltage level stays within the selected voltage bandwidth

• unacceptable voltage levels – voltages outside the bandwidth voltage thresholds

• emergency voltage levels much higher, or much lower than, the bandwidth voltage thresholds.

Usually the magnitude of the voltage bandwidth half is considered to be twice the voltage change per the LTC step change, or 1.5 V volts in the common system. In fact the most common bandwidth settings for tight voltage regulation are 2.0, 2.5 and 3.0 volts. TIME DELAY (COMPUTATION TIME DELAY)The Multilin DGCV provides selection of the Computation Time Delay used to delay the operation of the tap changer, should the movement of the measured voltage outside the bandwidth be of short duration. An example of such a short voltage dip can be the starting of a motor connected the bus supplied by the transformer, where the tap changer should not raise the tap for that time period. The time delay is usually set to tens of seconds to even few minutes, depending on the case.LINE DROP COMPENSATIONVoltage regulators are usually mounted in the proximity of the power transformer side far from the actual load. During feeder loading the voltage at the load locations is lower than the voltage at the voltage regulator’s location. The voltage difference is known as the Line Voltage Drop, which must be compensated for by the regulator. The voltage drop is caused by the resistance and the inductive reactance of the line, so that both the resistive and the reactive voltage drop compensations must be computed. The Conservative approach to calculating the line resistive and reactive voltage drops would be to use the CT ratings. The setting is entered in volts based on the rated CT primary current, and the resistance and reactance at the center load of the feeder.

Where:Ir = the primary rating of the CT in ampsR = the line resistance in ohmsX = the line reactance in ohmsVTratio = the VT ratioA more accurate approach to defining the line drop compensations would be to replace the rated CT primary current in the above formulas with either the power transformer nominal current, or the maximum load current. The Multilin DGCV can be connected to any single voltage and single current pair, or to three-phase voltages and currents. When a phase-to-ground or Wye VT connection is selected, the Line Drop programmed in the DGC is the drop voltage through the line for one phase-to-ground connection.LDC SETTING WITH DELTA VOLTAGE INPUTWhen either single phase-to-phase voltage, or Delta three-phase voltages are connected and programmed on the Multilin DGCV , the LDC settings are calculated and entered with respect to the phase-to-phase quantities. The R and X line drop compensations correspond to the phase-to-phase voltage drop through the line. The formula below shows the conversion to the phase-to-phase LDC:



Further, based on the measured load current and the selected resistive and reactive voltage drops settings, the Multilin DGCV computes the voltage drops in real-time and computes the load voltage. The Multilin DGCV compares the load voltage with the programmed voltage level and its bandwidth to define whether or not a tap change action is needed.

Where:Iload = the magnitude of the measured load current. α = the angle between the load current and the regulated voltageVL = the voltage level setting.VR = the regulated load voltage. PhaseCTType = the phase CT secondary selected by setting (1 or 5 A).AUTOMATIC PHASE SHIFTS UPON CURRENT AND VOLTAGE INPUTS SELECTIONThe Multilin DGCV can be programmed with any combination of single voltage and current inputs as well as with three-phase voltages and currents. The table below shows the phase shift correction of the selected current with respect with the selected voltage input. This is performed with respect to obtaining the correct load current used in the formula for LDC computation:

In order to provide a suitable line voltage drop compensation, the load current in the LDC equation is calculated by rotating the measured current coming from the CT input channel by the angle defined in the table. When Wye input current is selected, the channel of the phase A is taking as reference for the compensated voltage calculation.When Wye or Delta input voltage is selected, the voltage channel of the phase A is taking as reference for the voltage measurement.For instance:For selected CT input = Ib ; VT input = Va

Voltage Runback Limits The Voltage Runback Limits are individually programmable high and low voltage levels applied on both sides of the programmed voltage level setting to form an additional bandwidth. This function is used in cases where under normal operation heavy loads on the system with line drop compensation may result in excessive high voltage at the transformer secondary, to which the first customers fed by that transformer are subjected. If the load voltage exceeds the High Runback Limit, the control will immediately call for an automatic lowering of the tap without any time delay. The lower tap command will continue until the voltage is reduced below the Voltage Runback Limit. The same applies when the load voltage is very low beyond the Low Voltage Runback Limit, where the controller will call for immediate raising of the tap.The selection of the Voltage Runback Limit levels is performed with respect to the following rules:

• The High Voltage Runback Limit must be higher than the selected high band voltage.

Ia/Wye Ib Ic

Va/Vab/Delta/Wye 1∠0° 1∠-240° 1∠-120°

Vb/Vbc 1∠-120° 1∠0° 1∠-240°

Vc/Vca 1∠-240° 1∠-120° 1∠0°



• The Low Voltage Runback Limit must be lower than the selected low band voltage.

• The voltage setting of the High Runback Limit must be higher than the voltage setting for the Low Runback Limit.

VOLTAGE REDUCTIONThis function can be used in cases where system-wide voltage reduction is imposed in order to reduce demand at critical loading periods. The function prevents the primary equipment from overload, over-power conditions beyond their ratings, by either stopping further raise tap commands, or, depending on the level of reduction, even forcing lower tap commands. The voltage reduction function shifts the voltage level setting downward by a specified percentage. The shifting of the voltage level and its bandwidth impacts the computed load voltage which could become higher than the high band voltage level. The regulator issues a lower tap command to lower the voltage back below the high-band level. There are three levels of voltage reduction configurable from 0 to 10% with a step of 0.1%. Each voltage reduction level is associated with a programmable input setting which can be either an internal FlexLogic operand, an external contact input, or an input over a radio communication channel with Modbus or DNP protocol. For example a reduction of 2.5 % with a 120V center voltage would result in a 3V reduction, 5% would be 6V, and 7.5% would apply a 9V reduction.The graph below shows how the reduction impacts the regulated and the load voltages:

UNDER- AND OVER- VOLTAGE, AND OVER-CURRENT INHIBITS The Multilin DGCV provides two programmable voltage levels to denote the maximum and minimum voltages beyond which the measured voltage is detected, as either over-voltage or under-voltage. The under-voltage inhibit is used to prevent low-voltage conditions that may cause disconnection of the motors from the feeder by the opening of the contactors or tripping of their breakers, as well as to maintain power system stability. The overvoltage inhibit is used to provide more security for the power transformer and the associated equipment by keeping the measured voltages below their ratings.UNDER-VOLTAGE INHIBITThe under-voltage inhibit is applied to prevent further lowering of the tap, to limit low customer voltage to safe limits, and to block further voltage reduction that could cause motor stalling and other undesirable low-voltage effects. The under-voltage inhibit is applied to prevent tap change operations during a system breakdown in order to avoid the tap changer mechanism from being driven to the last tap. This function prevents both lower- and raise-tap actions.



OVER-VOLTAGE INHIBITThe over-voltage inhibit is applied to prevent further raise-tap action due to load increase, which demands higher voltage at the transformer side. When the measured voltage at the transformer secondary goes above the over-voltage inhibit threshold, the tap changer will stop raising the tap. OVER-CURRENT INHIBITThe over-current inhibit of the tap changer operation is applied to prevent further raise-tap action due to detection of line current exceeding the maximum load current. This function prevents both, the raise- and lower-tap change commands

Main regulationPATH: SETPOINTS > S3 VOLT REGULATOR > S3 SETPOINT GROUP 1/2/3 > S3 MAIN REGULATION

VOLTAGE LEVEL

Range: 60.0 to 250.0 V in steps of 0.1 VDefault: 120.0 V

The Multilin DGCV computes a load voltage and compares it with the Voltage Level setting to issue a Raise or a Lower Tap command to the tap changer. The selected voltage level is at the center of the voltage band.

NOTE

NOTE: This setting is also accessible by pressing the VOLTAGE LEVEL pushbutton located on the Multilin DGCV front panel, or by navigating through the menu using the keypad.

BANDWIDTH


The bandwidth setting defines the total voltage width applied around the selected voltage level (band center). No tap change command is issued if the magnitude of the computed load voltage is within the bandwidth. If the computed load voltage is above or below the Voltage Level ±½ bandwidth, the Multilin DGCV detects an ‘out of the band’ condition.

NOTE

NOTE: This setting is also accessible by pressing the BANDWITH pushbutton located on the Multilin DGCV front panel, or by navigating through the menu using the keypad.

LDC RESISTIVE R

Range: (-)96.0 V to (+)96.0 V in steps of 0.1 VDefault: 0.0 V

This setting defines the voltage drop between the voltage at the transformer side and the load voltage center at nominal load due to the resistive component of the load.

LDC REACTIVE X

Range: (-)96.0 V to (+)96.0 V in steps of 0.1 VDefault: 0.0 V

This setting defines the voltage drop between the voltage at the transformer side and the voltage load center of the line due to the line inductive reactance component.

NOTE

NOTE: Both LDC R and LDC X settings are easily accessed by pressing the LDC pushbutton, or through the menu, by navigating with the keypad located on the front panel of the Multilin DGCV .



REGULATION TYPE

Range: Sequential, Non SequentialDefault: Sequential

This setting defines the tap changing operation mode. The Multilin DGCV supports two regulation modes: Sequential, and Non Sequential.

In Sequential mode, the first Raise/lower tap operation occurs after the Computation Time Delay expires. After the first tap change, the Computation Time Delay is bypassed, if more raise or lower tap change operations are performed.

In Non-Sequential mode, the Computation Time Delay (inverse time or fixed delay) is always used after each raise or lower tap change operation.

The Tap Changer Time is the minimum time needed for the voltage regulator to reach the targeted tap. The regulator is inhibited to issue a new tap change until this time elapses. This time is always used for both regulating methods at each automatic or manual tap change command.

COMPUTATION MODE

Range: Definite Time, Inverse TimeDefault: Definite Time

When Definite Time is selected, the setpoint ‘Computation Time delay’ contains the fixed time needed to inhibit a tap changer before a raise/lower command is issued. Otherwise, if Inverse Time is selected the equation applied is:

Where:

OpTime = Operation Time

CTD = Computation Time Delay

VL = the voltage level setting

VR = the regulated voltage at load side

BD = the programmed BandWidth

The greater the voltage deviation, the shorter the respond time.

Deviation is calculated in times of computed load voltage from voltage level.

COMPUTATION TIME DELAY

Range: 0.0 to 300.0 sec in steps of 0.1 secDefault: 5.0 sec

The function of this timer is to prevent the regulator from responding to rapid voltage fluctuations. A tap change is made only after the computed load voltage has been outside the bandwidth for the set period of time.

If Inverse time is selected, the selected Computation Time Delay is used in the inverse time equation to define the time that will be taken before the tap change command is initiated. For inverse time mode, a Linear Reset is provided based on the following linear equation:

Treset = E*K

Where:

Treset = Reset Time in seconds

E = energy capacity reached (per unit)

K = characteristic constant of 5

With this formula the maximum reset time is 5 seconds for 100% energy capacity reached.



If Definite Time mode is selected, the selected Computation Time Delay defines the allowed period of time for the load voltage to be outside the bandwidth before initiating a raise or lower tap change command. If the monitored voltage level falls within the bandwidth limits before the definite time expires, the raise / lower counter is reset. This reset is instantaneous.

TAP CHANGER OP MODE

Range: Direct, ReverseDefault: Direct

Select Direct tap changer mode, if the tap changer is to operate such that a raise-tap changer command is issued when the load voltage is lower, and a lower-tap change command is issued when the load voltage is higher than the required voltage.

Some on-line voltage regulators operate in Reverse mode under normal conditions. This means that when the voltage is lower than expected, performing a lower-tap change operation leads to increasing the voltage, and vice-versa; for higher than expected voltages the tap changer raises the tap to lower the voltage.

Runback limitsPATH: SETPOINTS > S3 VOLT REGULATOR > S3 SETPOINT GROUP 1/2/3 > S3 RUNBACK LIMITS

VOLTAGE RUNBACK


This setting Enables/Disables the function of applying Voltage Runback limits.

HIGH V RBACK LIMIT


This setting defines the High Voltage Runback Limit level for the Multilin DGCV . If the load voltage exceeds this level the control will immediately call for an automatic lowering of the tap without any time delay. The lower tap command will continue until the voltage is reduced below the High Voltage Runback Limit. The High Voltage Runback Limit must be higher than the high bandwidth voltage level.

LOW V RBACK LIMIT


This setting defines the Low Voltage Runback Limit level for the Multilin DGCV . If the load voltage goes below this level, the control will immediately call for an automatic raise-tap command without any time delay. The raise-tap command will continue until the voltage is above the low voltage runback limit. The low voltage runback limit must be lower than the low bandwidth voltage level.

NOTE

NOTE: The High and Low runback limit settings are also accessible by pressing the RUNBACK VOLTAGE LIMITS pushbutton, or by navigating through the menu using the keypad located on the front panel of the Multilin DGCV . The front panel LED, next to the Runback Limit pushbutton, will light up if the Volt Runbck Limit setting is set to "Enabled".



Voltage reductionPATH: SETPOINTS > S3 VOLT REGULATOR > S3 SETPOINT GROUP 1/2/3 > S3 VOLTAGE REDUCTION

VOLT REDUCTION 1

Range: 0.1 to 10.0% in steps of 0.1%Default: 2.5%

This setting defines the percentage reduction that will apply to the voltage level setting, if VOLT REDUCTN 1 INPUT is activated.

VOLT REDUCTION 1 INPUT

Range: Off, Input from a list of inputsDefault: Off

This setting requires the selection of a digital input. Upon input activation, the Multilin DGCV automatically reduces the voltage level setting by the percentage set under the setting VOLT REDUCTION 1.

VOLT REDUCTION 2






VOLT REDUCTION 3






NOTE

NOTE: These settings are easily accessible by pressing the Quick Setpoints VOLTAGE REDUCTION pushbutton, or by navigating through the menu using the keypad; both located on the front panel of the Multilin DGCV . The front panel LED next to the VOLTAGE REDUCTION pushbutton will light up if the selected setting for at least one Voltage Reduction input is different than “Off”. This is equivalent to "Enabled".If more than one Voltage Reduction Input is set, the priority for Voltage Reduction value is first, Input 3, then Input 2.



Power overridePower Override supervision is activated upon detection of reverse power. The function can be selected to perform one of the following actions:

• Ignore

• Block

• Return to Neutral

• Regulate

When Ignore mode is selected, Reverse Power is ignored - i.e. no action is initiated.In Block mode, the detection of reverse power will generate an ALARM. During the presence of reverse power, the regulator will not initiate a tap change, and will stay blocked. The regulator will be unblocked when the reverse power returns below the specified limits.If Return to Neutral mode is selected, the detection of a Reverse Power will generate an Alarm and the regulator will command the tap changer to move to the Neutral Tap position. The tap changer will stays blocked during the presence of reverse power. In Regulate mode, the Multilin DGCV uses the set points of the Line Drop Compensation and applies them during the detection of Reverse Power. The Raise/Lower operations are interchanged during this time.PATH: SETPOINTS > S3 VOLT REGULATOR > S3 SETPOINT GROUP 1/2/3 > S3 POWER OVERRIDE

REVERSE POWER DETECTION

Range: 1 to 1000 kW in steps of 1 kWDefault: 20 kW

If the magnitude of the current is higher than this setpoint during the time programmed under Power Time Delay, a reverse power condition is detected. A flag is raised to signal this situation.

REVERSE POWER TIME DELAY

Range: 0 to 3600 s in steps of 1 sDefault: 10 s

This is the minimum time used for detection of reverse power above the Reverse Power Detection setting.

REVERSE LINE DROP COMPENSATIONS R

Range: (-)96.0 to (+)96.0 V in steps of 0.1 VDefault: 0.0 V

The function of this setting is to modify the voltage level, proportional to the load current and the setting of the control setting, so that the voltage at a point distant from the tap changer may be controlled. The customer calculates his line impedance and enters the voltage drop at nominal current from the resistance component in the Line Drop Compensation R.

REVERSE LINE DROP COMPENSATIONS X

Range: (-)96.0 to (+)96.0 V in steps of 0.1 VDefault: 0.0 V

The function of this setting is to modify the voltage level, proportional to the load current and the setting of the control setting, so that the voltage at a point distant from the tap changer may be controlled. The customer calculates his line impedance and enters the voltage drop at nominal current from the reactance component in the Line Drop Compensation R.

NOTE

NOTE: The Reverse Power settings are easily accessed by pressing the Quick Setpoints REVERSE POWER pushbutton, or through the menu by navigating with the keypad, both located on the front panel of the Multilin DGCV .



The front panel LED next to the REVERSE POWER pushbutton will light up, when the Reverse Power Mode is set to either BLOCK, RETURN TO NEUTRAL, or REGULATE.

Inhibit functionsPATH: SETPOINTS > S3 VOLT REGULATOR > S3 SETPOINT GROUP 1/2/3 > S3 INHIBIT FUNCTIONS

PHASE OC FUNCTION

Range: Disabled, Manual, Auto, BothDefault: Disabled

If Disabled is selected, the OC inhibit function is not active. The regulator will not be inhibited.

In Manual or Auto mode, if an overcurrent condition occurs, the tap regulation control is blocked for the selected mode only.

If Both mode is selected and an overcurrent condition occurs, the tap regulation control is blocked for Manual and Auto modes.

PHASE OC PKP

Range: 0.2 to 2.5 x CT in steps of 0.1 x CTDefault: 0.5 x CT

If the measured phase current is above the selected pickup setting, an overcurrent condition is detected.

PHASE OC DELAY

Range: 0.0 to 600.0 s in steps of 0.1 sDefault: 1.0 s

This is the minimum time in an overcurrent condition before inhibiting the tap control operation.

PHASE OV FUNCTION


If Disabled is selected, the OV inhibit function is not active. The regulator will not be inhibited upon overvoltage detection.

In Manual or Auto mode, if an overvoltage condition occurs, the tap regulation control is blocked for the selected mode only, for tap-raise operations.

If Both mode is selected and an overvoltage condition occurs, the tap regulation control is blocked for Manual and Auto modes, for tap-raise operations.

PHASE OV PKP


If the measured voltage is above the selected overvoltage pickup setting, an overvoltage condition is detected.

PHASE OV DELAY


This is the minimum time the overvoltage condition has to be over the overvoltage pickup setting to activate the block.



PHASE UV FUNCTION


If Disabled is selected, the UV inhibit function is not active. The regulator will not be inhibited.

In Manual or Auto mode, if an undervoltage condition occurs, the tap regulation control is blocked only for the selected mode.

If Both mode is selected and an undervoltage condition occurs, the tap regulation control is always blocked.

PHASE UV PKP


If the measured voltage is below the selected pickup setting, an undervoltage condition is detected.

PHASE UV DELAY


This is the minimum time the undervoltage condition has to be over the undervoltage pickup setting to activate the block.

Tap Changer control logicThe Multilin DGCV controls the transformer tap changer automatically by applying voltage-based control functions. In Direct Operation Mode, the Multilin DGCV sends Raise, or Lower command using the first two digital outputs – RLY 1 CONTROL for raising the tap, and RLY 2 CONTROL for lowering the tap. The decision to send Raise, or Lower tap command, is performed upon comparison of the programmed Voltage Level, and the measured load voltage adjusted by the programmed Resistance/Reactance Line voltage Drop compensation. If the difference between the two voltages exceeds either the upper or the lower half of the programmed bandwidth during a period of time (programmed computation time), a Raise or Lower tap operation is initiated.When the tap changer position reaches the programmed number of taps a MAX TAP ALARM condition is produced. In this state all Raise commands are inhibited. In the same way when the tap changer position reaches the minimum tap, a MIN TAP ALARM condition is declared, and any further Lower command is inhibited.The Multilin DGCV will issue a tap changer command to the tap changer only after the tap changer has successfully completed a previous tap change command (the tap is correctly detected). When the tap changer delay started by a Raise or a Lower command timer elapses, the control checks the new tap position. If this new tap position is the same as the one before the command was initiated a UNSUCCESSFUL TAP CHANGE condition is detected. However, if the newly detected tap position is out of bound that is out of the LTC range (programmed number of taps), or different than the expected value, an INCOMPLETE TAP SEQUENCE condition is produced. In both situations the Multilin DGCV is blocked.To unblock the DGC a manual RESET / DRAG HANDS RESET need be performed.In this logic diagram MEM TAP (memorized Tap) element refers to the tap position memorized before the tap change command. It used to check if the tap changer operation has succeeded, and for sequence detection.ERROR IN REL SETTINGS Status refers to the integrity check between related settings. If a conflict is detected between settings a message is produced and the controller goes to block state.The automatic logic associated with the load-tap changer regulator is depicted below:



Figure 9: : DGC Voltage Regulator - logic diagram (Sheet 1 of 3)S

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Figure 11: DGC Voltage Regulator - Manual Commands - logic diagram (Sheet 3 of 3)

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S4 CONTROLS CHAPTER 5: SETTINGS

S4 Controls

Figure 12: Voltage Regulator and Controls menu

S3 VOLT REGULATOR

SETPOINT GROUP 1

SETPOINT GROUP 2

SETPOINT GROUP 3

SETPOINTS

S1 PRODUCT SETUP

S2 SYSTEM SETUP

S3 VOLT REGULATOR

S4 CONTROLS

S5 INPUTS/OUTPUTS

▼

S3 SETPOINT GROUP 1,2,3

MAIN REGULATION

VOLT RUNBCK LIMITS

VOLTAGE REDUCTION

INHIBIT FUNCTIONS

POWER OVERRIDE

▼

S4 REMOTE CONTROL

REMOTE RAISE TAP

REMOTE LOWER TAP

▼

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SET GROUP 2 ACTIVE

BLK GROUP CHANGE

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▼

S4 VIRTUAL INPUTS

VIRTUAL INPUT 1

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VIRTUAL INPUT 32

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S4

RESET

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S3 MAIN REGULATION

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REGULATION TYPE

COMPUTATION MODE

COMPUTATION DELAY

OPERATION MODE

LDC RESISTIVE R

LDC INDUCTIVE X

▼

S3 VOLTAGE RUNBCK LIMITS

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LOW V RUNBCK LIMT

▼

S3 VOLTAGE REDUCTION

VOLT REDUCTION 1

VOLT REDUC 1 INPUT

VOLT REDUCTION 2

VOLT REDUC 2 INPUT

VOLT REDUCTION 3

VOLT REDUC 3 INPUT

▼

S3 POWER OVERRIDE

POWER OP MODE

REV PWR DETECTION

REVERSE PWR DELAY

REVERSE PWR LDC R

REVERSE PWR LDC X

▼

S3 INHIBIT FUNCTIONS

PH OC FUNCTION

PH OC PKP

PH OC DELAY

PH OV FUNCTION

PH OV PKP

PH OV DELAY

PH UV FUNCTION

PH UV PKP

PH UV DELAY

▼

S4 CONTROLS

REMOTE CONTROL

CHANGE SETP GROUP

VIRTUAL INPUTS

REMOTE RST/DH RST

▼

CHAPTER 5: SETTINGS S4 CONTROLS


Change settings groupThe Multilin DGCV has three identical settings groups - Groups 1, 2 , and 3 - for all Voltage Regulator elements. Switching between these three groups is available either automatically by assigning an input (contact, virtual, remote, flexlogic element), or manually through communications.Group 1 is the default setting group. The device can automatically switch from Group 1 Voltage Regulator elements to the other group elements, and vice versa, by setting up the switching conditions under “Change Setpoint Group”. Under some application conditions, it may be undesirable to change settings groups. In such cases, the user can set a condition under “BLK GROUP CHANGE”, where if asserted, the active settings group will stay active, even if the input configured to switch to the other settings group is asserted. For example if the active group was group 1 at any given time, and the input configured under “BLK GROUP CHANGE” is asserted, the relay will maintain settings group 1, even if the input “SET GROUP 2 (3) ACTIVE” is asserted. Visa versa, if the “BLK GROUP CHANGE” input is asserted, the relay will not switch from group 2/3 to group 1, even if the input under “SET GROUP 2 (3) ACTIVE” is de-asserted. The device will default to settings group 1, if both the input “SET GROUP 2 (3) ACTIVE” and the blocking input “BLK GROUP CHANGE” are de-asserted. Table group 3 of settings has a higher priority than the rest of settings groups. That means, if both “SET GROUP 2 ACTIVE” and “SET GROUP 3 ACTIVE” signals are maintained asserted at the same time, the Multilin DGCV will change to the table 3 of settings.The logic functionality takes into account this feature. PATH: S4 CONTROLS > CHANGE SPNT GROUP

SET GROUP 2 ACTIVE

Range: Off, Contact Input 1 to 12 (Order Code dependent), Virtual Input 1 to 32, Virtual Output 1 to 32Default: Off

This setting selects an input, used to change to Setpoint Group 2, when asserted. If no group change supervision is selected, the Setpoint Group 2 will stay active as long as the “SET GROUP 2 ACTIVE” input is asserted, and will revert to group 1, when this input is de-asserted.

SET GROUP 3 ACTIVE


This setting selects an input, used to change to Setpoint Group 3, when asserted. If no group change supervision is selected, the Setpoint Group 3 will stay active as long as the “SET GROUP 3 ACTIVE” input is asserted, and will revert to the default group, when this input is de-asserted.

BLOCK GROUP CHANGE


This setting defines an input that can be used to block changing settings groups. When the assigned input is asserted, changing from one settings group to the other one is blocked.



Figure 13: Changing Settings groups - logic diagram

Modes of VR operationThe Multilin DGCV has two modes of operation – Auto/Remote and Manual. The desired mode of operation is selected by toggling the AUTO/REM - MANUAL control pushbutton located on the faceplate of the regulator. The AUTO/REM - MANUAL pushbutton is active only if the Tap Changer control panel is set to Enabled. The green LED Enabled light indicates that the controls from the Tap Changer Control panel are enabled.

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Manual operation Manual mode of operation is set by pressing the AUTO/REM – MANUAL control pushbutton. The MANUAL LED turns to green, indicating the selected mode of operation.In Manual mode, the voltage regulator controls the transformer output voltage by responding to manually performed raise or lower tap commands which use the RAISE and LOWER pushbuttons accordingly. When set to MANUAL mode, the tap changer can only be controlled using the faceplate RAISE and LOWER pushbuttons, or through the COMMANDS menu. In this mode automatic regulation and remote controls are blocked. The SCADA still receives data, but the SCADA control inputs are blocked.Pressing the RAISE pushbutton raises the tap position of the tap changer, whereas pressing the LOWER pushbutton lowers it .The operation of the following functions blocks the Manual controls:

• Overcurrent inhibit set to “Manual” or “Both”

• UnderVoltage inhibit set to “Manual” or “Both”

• TAP inhibit Input

• Disabled mode

• Incorrect TAP Changer value (No Tap Changer value or Out of Bounds)

• Tap Changer delay timer counting.

The Manual Raise command is blocked, if the Manual Overvoltage inhibit is active, or if the Maximum TAP position is reached. The Manual Lower command is blocked, if the Minimum TAP position is reached.The Manual command will be executed properly, and the voltage regulator will send a Raise or Lower command to the tap changer motor, if none of the inhibits is active. The digital output RLY 1 CONTROL or RLY 2 CONTROL, related to the Raise and the Lower tap commands will close, and will stay closed for the time specified in ‘Seal-in time’. The Multilin DGCV controller will wait until the specified Tap Changer Delay expires, and until the state of the Tap Changer Inhibit input (if programmed) drops down, before detecting the new tap position.The diagram below depicts the manual tap change logic.

NOTE

NOTE: The “Tap changer Delay” time shall be set longer than the "RLY Seal-in Time" for raise and lower outputs.

The LDC voltage compensation using the Main Regulation LDC or the Reverse Power LDC settings, is performed in Manual mode. The Voltage Reduction, Voltage Level, Runback Limits, UV/OV/OC, and Power Override functions do not apply in Manual mode, and the automatic Raise, or Lower Tap commands are blocked. Events and Target Messages are generated.



Figure 14: Manual tap change commands scheme - logic diagram

Auto/Remoteoperation

In Automatic/Remote mode, the Multilin DGCV controls the transformer tap changer automatically by applying the main and additional voltage controlling functions. The Multilin DGCV sends either a Raise, or a Lower command using the first two digital outputs – RLY 1 CONTROL for raising the tap, and RLY 2 CONTROL for lowering it , if Direct Operation mode is set. The decision to send a Raise, or Lower tap command, is performed upon comparison of the programmed Voltage Level, with the Measured Load Voltage adjusted by the programmed Resistance/Reactance Line Voltage Drop compensation. If the difference between the two voltages exceeds either the upper or the lower half of the programmed bandwidth during a period of time (programmed computation time), a Raise or Lower tap operation is initiated. In Automatic mode, the voltage regulator controls the load voltage using the following voltage regulating elements:

• Voltage Level

• Bandwidth

• Computation Time Delay

• Tap Changer Time Delay

• Input Voltage - measured

• Input Current - measured

• Line Drop Compensation R, X

• Runback Voltage limits (if enabled)

• Reverse Power (if enabled)

• Voltage Reduction (if “enabled”)

• Inhibitions (OC/OV/UV)

• TAP Changer position.

Both the Raise and Lower automatic commands will be blocked, if any of the following conditions occur:

• Overcurrent inhibit set to “Auto”, or “Both”

• Undervoltage inhibit set to “Auto”, or “Both”

• TAP Inhibit Input

• Reverse Power set to “Block” mode

• Reverse Power set to “Return to Neutral” mode with Neutral TAP reached

• Incorrect TAP position (No Tap position or tap position out of bounds)

TAP CHANGER INHIBITOR

Inhibit OC/UV

Incorrect Tap Changer

Inhibit OVOR

AND

AND

Raise CMD

Lower CMD

SETPOINT

TAP CHANGER DELAY

SETPOINT

TAP CHANGER DELAY

SETPOINT

TAP CHANGER DELAY

t

t

t

OR

RAISE (to Tap Changer)

LOWER (to Tap Changer)

891923.cdr



• Disabled Mode

• Manual mode

• Voltage below 20 Volts

• Tap Changer delay timer counting.

Two more inhibits apply to the Automatic Raise command:

• Auto Overvoltage inhibit

• Maximum TAP position reached.

One more inhibit applies to the Automatic Lower command:

• Minimum TAP position reached.

When in Automatic/Remote mode, the Multilin DGCV can be controlled remotely by SCADA, or an IED, via radio communication and Modbus, or by DNP protocol. The SCADA is configured to receive data and to write to the Multilin DGCV by mapping the Modbus or DNP addresses provided in this manual. The remote SCADA control over radio is inhibited by the DGC when it is set to Manual mode. Data monitoring is enabled. The Manual commands are enabled in Auto/Remote and Manual modes.

Sequential and Non-sequential tap

changer operation

Sequential or Non-Sequential tap change operation is selected from the main voltage regulation menu. When the voltage under regulation is detected to be higher or lower than the programmed voltage level bandwidth, the Voltage Regulator detects an “out of band” condition. In Non-sequential mode, the computation time delay applies to each Raise or Lower tap command. The regulator increases one tap at the time until the voltage is once again within the bandwidth. In Sequential mode, the computation time delay is timed out only for the first tap change. If the voltage is still "out of band," the control will continue issuing tap change commands without running through the Computation Time Delay, until the voltage is brought back into the band.The Computation Time Delay is settable to either a definite time with instantaneous reset, or an inverse time with linear reset.The Computation Time Delay is applied only when in Auto/Remote mode. The Computation Time Delay is not triggered during Manual operation. If a manual tap change command is issued during timing out of the Computation Time Delay, and a tap change is made (tap changer delay expired), but if the regulated voltage is still “out of band” the Computation Time delay will reset to start from the beginning. The Computation time delay is not triggered, if the regulated voltage exceeds any of the Runback Voltage limits when in Auto/Remote mode.

Direct and ReverseOperation Mode

(automatic operationsonly)

For Automatic operation, and “Direct” mode selection, the Raise tap command is executed by closing the RLY 1 CONTROL output, and the Lower tap command is executed by closing the RLY 2 CONTROL output. In “Reverse” Mode these two outputs are executed in exactly the same manner.

Remote RAISE andLOWER commands

The Multilin DGCV provides two additional settings for remote Raise and Lower commands by selection of a contact input, a virtual input, or a FlexLogic™ programmed virtual output. These operations can be executed only if the Voltage Regulator is in Auto/Remote mode.

Settings group control The DGC has three identical settings groups, each of which includes the settings of main regulation, runback limits, voltage reduction, power override, and inhibit functions. Only one of the three settings groups is active at any one time. Setpoint Group 1 is the active group by default. To activate any of the other two settings groups, the corresponding SET GROUP X ACTIVE setting must be programmed by selecting a contact input, a virtual input,



or a virtual output. If the programmed inputs for both Group 2 and Group 3 are detected as “high,” the Multilin DGCV applies the Group 2 settings. The active settings group can be locked active, by programming and energizing the input selected under BLK GROUP CHANGE.

Virtual inputs There are 32 Virtual Inputs that can be individually programmed to respond to Input commands entered via the relay keypad, or by using communication protocols. SETPOINTS > S4 CONTROLS > VIRTUAL INPUTS

VIRTUAL INPUT 1

Range: Off, OnDefault: Off

The state of each virtual input can be controlled under SETPOINTS > S4 CONTROL > VIRTUAL INPUTS menu. For this purpose, each of the virtual inputs selected for control need be “Enabled” under SETPOINTS > S5 INPUTS/OUTPUTS > VIRTUAL INPUTS, and its type “Self-Reset” or “Latched” specified.If Self-Reset type was selected, entering “On” command will lead to a pulse of one protection pass. To prolong the time of the virtual input pulse, one can assign it as a trigger source to an element with a dropout timer set to the desired pulse time. If “Latched” type is selected, the state of the virtual input will be latched, upon entering “On” command.Refer to the logic diagram below for more details.

Figure 15: Virtual Inputs Scheme - logic diagram

Remote Reset/Drag-Hands reset

This setting provides the selection of an input for remotely resetting the Multilin DGCV target messages and the triggered LEDs. Upon energizing of the programmed input, the Maximum and Minimum tap statistic data from the PRODUCT INFO menu will reset.

FlexLogic™The Multilin DGCV FlexLogic™ system, defines operators, and lists of operands. In essence, all the necessary information for custom built logic. The FlexLogic tool is accessible from the EnerVista DGCV Setup program under the SETPOINTS/ FLEXLOGIC menuAll Multilin DGCV digital signal states are represented by FlexLogic™ operands. Each operand is in one of two states: on (asserted, logic 1, or set), or off (de-asserted, logic 0, or reset). There is a FlexLogic™ operand for each contact input, contact output, communications command, control panel command, element trip, and element alarm, as well as many others.A list of FlexLogic™ operands and operators are sequentially processed once every 4.17 ms or 5 ms, depending on the power system frequency (60 Hz or 50 Hz) (TBC). When list processing encounters an operand, the value of that operand is placed in a first in - first out stack. When list processing encounters a calculation operator, the number of values

SETTING

V INPUT FUNCTION

Enabled = 1

Disabled = 0

AND“Virtual Input 1 to ON = 1”

“Virtual Input 1 to OFF = 1” AND

SETTING

V INPUT1 TYPE

Self-Reset

LatchedAND

LATCH

S

R

>

OR

SETTING

V INPUT1 NAME:(Operand)

V Input1 Status

891924.cdr



required for the calculation are removed from the stack, and the result of the operation is placed back on the stack. The operators are logic gates (for example, AND, OR, NOT), timers, latches, one-shots, and assignments. Assignment operators assign the value calculated by the preceding operators to a special class of operands called virtual outputs. Like any other operand, a virtual output can be used as an input to any operator –feedback to achieve seal-in is allowed. When list processing encounters an end operator, processing is stopped until the next processing cycle, at which time it restarts at the top of the list.Each contact output has a setpoint to specify the operand that drives the output. Any operand may be selected – selection of a virtual output is the means by which FlexLogic™ directly controls external equipment such as the motor contactors.The operators used in FlexLogic™ conform to the following rules:

• 512 lines for bulding logic are available in the FlexLogic tool. All lines are executed every 1 / 4 power system cycle (4.17 ms. or 5 ms) (TBC).

• A virtual output may only be assigned once within the FlexLogic environment. An unassigned virtual output will have a value of off.

• A maximum of thirty (32) general purpose timers (timers 1 through 32) are available for configuration. Each timer may only be used once within the FlexLogic environment.

• A maximum of thirty (30) one-shots are allowed.

• A maximum of 16 latches are supported.

FlexLogic™ operands The FlexLogic™ operands available in the Multilin DGCV are listed below.

Control operands: Group 1 Active OP......................................Activates when Setting Group 1 is applied.Group 1 Active DPO ..................................Activates when the Multilin DGCV is switched to a Setting Group

different from Group 1.Group 2 Active OP......................................Activates when Setting Group 2 is applied.

Operator Inputs Description

<operand> none The output value is the value of the named <operand>.

NOT 1 The output value is “on” if and only if any of the input values are “off”.

OR 2 to 16 The output value is “on” if and only if any of the input values are “on”.

AND 2 to 16 The output value is “on” if and only if all of the input values are “on”.

NOR 2 to 16 The output value is “on” if and only if all of the input values are “off”.

NAND 2 to 16 The output value is “on” if and only if any of the input values are “off”.

XOR 2 The output value is “on” if and only if one input value is “on” and the other input value is “off”.

TIMER 1 The output value is “on” if the input value has been “on” for the set pickup time. Once the output value is “on”, it remains “on” until the input value has been “off” for the set dropout time.

LATCH 2 The output value is the state of a reset-dominant volatile bi-stable latch, where the first input value is the set input , and the second input value is the reset input.

Positive-one-shot 1 The output value is “on” for one processing cycle following an off-to-on transition of the input value.

Negative-one-shot 1 The output value is “on” for one processing cycle following an on-to-off transition of the input value.

Dual-one-shot 1 The output value is “on” for one processing cycle following either an on-to-off or off-to-on transition of the input value.

ASSIGN <operand> 1 The input value is assigned to the named operand. There is otherwise no output value.

END none The first END encountered terminates the current processing cycle.



Group 2 Active DPO..................................Activates when the Multilin DGCV is switched to a Setting Group different from Group 2.

Group 3 Active OP .....................................Activates when Setting Group 3 is applied.Group 3 Active DPO..................................Activates when the Multilin DGCV is switched to a Setting Group

different from Group 3.Auto/Remote ...............................................Activates when the Multilin DGCV is switched to Auto/Remote

mode.Manual............................................................Activates when the Multilin DGCV is switched to Manual mode.Reverse Power OP .....................................Activates when the Reverse Power element operates.Reverse Power DPO..................................Activates when the Reverse Power level drops below the pickup

level.Reverse Power PKP...................................Activates when the Reverse Power level rises above the pickup

level.Auto Raise Tap ............................................Activates when the Tap is raised in Auto mode.Manual Raise Tap ......................................Activates when the Tap is raised in Manual mode.Auto Lower Tap ..........................................Activates when the Tap is lowered in Auto mode.Manual Lower Tap.....................................Activates when the Tap is lowered in Manual mode.High V Runback OP...................................Activated when the computed load voltage is above the High

Runback voltage limit.High V Runback DPO ...............................Activated when the computed load voltage becomes lower

than the High Runback voltage limit.Low V Runback OP....................................Activated when the computed load voltage is below the Low

Runback voltage limit.Low V Runback DPO.................................Activated when the computed load voltage becomes higher

than the Low Runback voltage limit.Volt Reduction 1 OP..................................Activates when Voltage Reduction 1 has been activated.Volt Reduction 1 DPO...............................Activates when Voltage Reduction 1 is deactivated.Volt Reduction 2 OP..................................Activates when Voltage Reduction 2 has been activated.Volt Reduction 2 DPO...............................Activates when Voltage Reduction 2 is deactivated.Volt Reduction 3 OP..................................Activates when Voltage Reduction 3 has been activated.Volt Reduction 3 DPO...............................Activates when Voltage Reduction 3 is deactivated.Reverse Power Reg OP............................Activates when reverse power is detected, with Power

Operation Mode set as “Regulate”.Reverse Power Reg DPO.........................Activates when the detected reverse power becomes lower

than the programmed Reverse Power detection level, with Power Operation Mode set as “Regulate”.

Rev Pwr Block OP.......................................Activated when reverse power is detected, with Power Operation Mode set as “Block”.

Rev Pwr Block DPO ...................................Activates after the reverse power is below the reverse power detection level, with Power Operation Mode set as “Block”.

Rev Pwr To Ntl OP......................................Activates when Power Override element set to “Return to Neutral” mode operates.

Rev Pwr To Ntl DPO...................................Activates after the reverse power is detected below the reverse power pickup level, with Power Operation Mode set as “Return to Neutral”.

Input/Output Operands:Contact Input 1 (2 to X) On ....................Asserted when the respective Contact Input is activated.Contact Input 1 (2 to X) Off....................Asserted when the respective Contact Input is deactivated.Contact Output 1 (2 to X) On ................Asserted when the respective Contact Output is activated.Contact Output 1 (2 to X) Off ................Asserted when the respective Contact Output is deactivated.



VI1 (VI1 to VO32) On..................................Asserted when the respective Virtual Input is activated.VI1 (VI2 to VI32) Off....................................Asserted when the respective Virtual Input is deactivated.VO1 (VO2 to VO32) On..............................Asserted when the respective Virtual Output is activated.VO1Off to VO32 Off ...................................Asserted when the respective Virtual Output is deactivated.

Alarm Operands:Any Alarm OP...............................................Activates when any Alarm Operand is asserted (logic 1).Not Configured ...........................................Activates when the DGC status is “Not Configured” under

INSTALLATION/PRODUCT STATUS.Self-test Alarm OP .....................................Activates when the CB detects a Self-test error.Self-test Alarm DPO..................................Activates when the Self-test error is resolved. Comm Fail Alarm OP ................................Activates when the communication channel fails.Comm Fail Alarm DPO.............................Activates when the communication channel starts to operate

properly. Max Taps Total OP.....................................Activates when the total Tap operations have been reached. Max Taps Total DPO..................................Activates when the counter is cleared using the counter clear

command or is cleared automatically at 12:00 midnight. Max Taps/Day OP ......................................Activates when the maximum Tap operations per day have

been reached. Max Taps/Day DPO...................................Activates when the counter is cleared using the counter clear

command, or is cleared automatically at 12:00 midnight. Min Tap Alarm OP ......................................Activates when the Tap changer reaches the minimum tap. Min Tap Alarm DPO...................................Activates when the Tap changer moves away from the

minimum tap position. Max Tap Alarm OP.....................................Activates when the Tap changer reaches the maximum tap. Max Tap Alarm DPO..................................Activates when the Tap changer moves away from the

maximum tap position. Out Of Band OP...........................................Activates when the computed load voltage level is beyond the

low or high bandwith level. Out Of Band DPO .......................................Activates when the computed load voltage level goes back

from Out Of Band to within the programmed bandwidth.

Block and Inhibit Operands:Group Change Block OP .........................Activates when the input programmed to block group change

is energized.Group Change Block DPO......................Activates when the input programmed to block group change

is de-energized.Any Inhibit OP ..............................................Activates when any of the blocks (inhibits) operates.Tap Changer Inhibit OP ...........................Activates when the programmed Tap Changer Inhibit input is

energized.Tap Changer Inhibit DPO........................Activates when the Tap Changer Inhibit input is de-energized.Unsuc Tap Chge OP ..................................Activates when no tap change is detected upon the tap change

command.Unsuc Tap Chge DPO...............................Activates upon the tap change being corrected.Incomp Tap Seq OP...................................Activates when tap position does not follow the increment/

decrement of 1 tap per command.Incomp Tap Seq DPO ............................... Activates upon detection of the correct sequence.OV Auto Inhibit PKP...................................Activates when the Multilin DGCV is in Auto or Both mode, and

the OV inhibit element picks-up.OV Auto Inhibit OP.....................................Activated when the Multilin DGCV is in Auto or Both mode, and

the OV inhibit operates.



OV Auto Inhibit DPO ................................. Activated when the Multilin DGCV is in Auto or Both mode, and the measured voltage drops below the programmed OV inhibit element pickup.

OV Manual Inhibit PKP.............................Activates when the Multilin DGCV is in Manual or Both mode, and the OV inhibit element picks-up.

OV Manual Inhibit OP...............................Activated when the Multilin DGCV is in Manual or Both mode, and the OV inhibit operates.

OV Manual Inhibit DPO............................ Activated when the Multilin DGCV is in Manual or Both mode, and the measured voltage drops below the programmed OV inhibit element pickup

UV Auto Inhibit PKP...................................Activates when the Multilin DGCV is in Auto or Both mode, and the UV inhibit element picks-up.

UV Auto Inhibit OP.....................................Activated when the Multilin DGCV is in Auto or Both mode, and the UV inhibit operates.

UV Auto Inhibit DPO.................................. Activated when the Multilin DGCV is in Auto or Both mode, and the measured voltage rises above the programmed UV inhibit element pickup.

UV Manual Inhibit PKP.............................Activates when the Multilin DGCV is in Manual or Both mode, and the UV inhibit element picks-up.

UV Manual Inhibit OP...............................Activated when the Multilin DGCV is in Manual or Both mode, and the UV inhibit operates.

UV Manual Inhibit DPO............................ Activated when the Multilin DGCV is in Manual or Both mode, and the measured voltage rises above the programmed UV inhibit element pickup.

OC Auto Inhibit PKP ..................................Activates when the Multilin DGCV is in Auto or Both mode, and the OC inhibit element picks-up.

OC Auto Inhibit OP.....................................Activated when the Multilin DGCV is in Auto or Both mode, and the OC inhibit operates.

OC Auto Inhibit DPO ................................. Activated when the Multilin DGCV is in Auto or Both mode, and the measured current drops below the programmed OC inhibit element pickup.

OC Manual Inhibit PKP.............................Activates when the Multilin DGCV is in Manual or Both mode, and the OC inhibit element picks-up.

OC Manual Inhibit OP...............................Activated when the Multilin DGCV is in Manual or Both mode, and the OC inhibit operates.

OC Manual Inhibit DPO ........................... Activated when the Multilin DGCV is in Manual or Both mode, and the measured current drops below the programmed OC inhibit element pickup.

CHAPTER 5: SETTINGS S5 INPUTS/OUTPUTS


S5 Inputs/Outputs

Figure 16: Inputs/Outputs menu

Contact inputsThe Multilin DGCV is equipped with six (6) contact inputs, which can be used to provide a variety of functions such as for circuit breaker control, external trips, blocking of protection elements, etc. A further six (6) contact inputs can be added with the purchase of another IO_C board (see the Order Codes section). All contact inputs are wet type contacts (refer to the typical wiring diagram) that require an external AC or DC voltage source.

SETPOINTS

S1 PRODUCT SETUP

S2 SYSTEM SETUP

S3 VOLT REGULATOR

S4 CONTROLS

S5 INPUTS/OUTPUTS

▼

891959.cdr

S5 INPUTS/OUTPUTS

OUTPUT RELAYS

CONTACT INPUTS

VIRTUAL INPUTS

S5 CONTACT INPUTS

CONTACT INPUT 1

CONTACT INPUT 2

...

CONTACT INPUT 12

▼

S4 VIRTUAL INPUTS

VIRTUAL INPUT 1

VIRTUAL INPUT 2

VIRTUAL INPUT3

VIRTUAL INPUT4

...

VIRTUAL INPUT 32

▼

S5 OUTPUT RELAYS

RLY 1 CONTROL

RLY 2 CONTROL

RLY 3 AUXILIARY

RLY 4 AUXILIARY

RLY 5 AUXILIARY

...

RLY x AUXILIARY

▼

S5 RLY 1 CONTROL

NAME

RLY 1 RAISE TAP

SEAL-IN TIME

▼

S5 RLY 2 CONTROL

NAME

RLY 2 LOWER TAP

SEAL-IN TIME

▼

S5 RLY 3 AUXILIARY

NAME

FUNCTION

OUTPUT TYPE

OPERATION

▼

S5 VIRTUAL INPUT 1

VI 1

VI 1

NAME

FUNCTION

VI 1 TYPE

▼

S5 VIRTUAL INPUT 32

VI 32

VI 32

NAME

FUNCTION

VI 32 TYPE

▼


S5 INPUTS/OUTPUTS CHAPTER 5: SETTINGS

PATH: SETPOINTS > S5 INPUTS/OUTPUTS > CONTACT INPUTS

CONTACT INPUT 1

Range: Eighteen CharactersDefault: Input 1

CONTACT INPUT 2

Range: Eighteen CharactersDefault: Input 2

CONTACT INPUT X [3 to 12]

Range: Eighteen CharactersDefault: Input X

Each of the contact inputs can be named to reflect the function it represents within the application. Up to 18 alpha-numeric characters are available for names.

Output relaysThe is equipped with seven electromechanical output relays: 2 form A relays (Relay 1 - Raise Tap, and Relay 2 - Lower Tap), and 4 form C relays (IO_D Card - see Order Codes section).

Output Relay 1 "RaiseTap"

PATH: SETPOINTS > S5 INPUTS/OUTPUTS > OUTPUT RELAYS > RLY 1 RAISE TAP

SEAL IN TIME


This setting defines the time to be added to the reset time of the Output Relay 1 Raise Tap output, thus extending its pulse width.

Output Relay 2 "LowerTap"

PATH: SETPOINTS > S5 INPUTS/OUTPUTS > OUTPUT RELAYS > RLY2 LOWER TAP

SEAL IN TIME


This setting defines the time to be added to the reset time of the Output Relay 2 Lower Tap output, thus extending its pulse width.

Auxiliary OutputRelays 3 to 7

Each auxiliary relay can be selected as either Self-reset, or Latched. If the Self-Reset type is selected, the output relay will be energized as long as the element is in operating mode and will reset when the element drops out. If the Latched type is selected, the output relay will stay energized, after the element dropout, and will be de-energized upon the reset command. If an auxiliary output is only required while the activating condition is present, select Self-Reset. Once an activating condition disappears, the auxiliary relay returns to the non-active state and the associated message automatically clears. To ensure all auxiliary function conditions are acknowledged, select Latched.PATH: SETPOINTS > S5 INPUTS/OUTPUTS > OUTPUT RELAYS > RLY 3(7) AUXILIARY

OUTPUT TYPE

Range: Self Reset, LatchedDefault: Self Reset

CHAPTER 5: SETTINGS S5 INPUTS/OUTPUTS


Virtual inputsThere are 32 Virtual Inputs that can be individually programmed to respond to Input commands entered via the relay keypad, or by using communication protocols. Virtual Input programming begins with enabling the Virtual Input function and selecting the Virtual Input Type - Self-Reset or Latched - under SETPOINTS > S5 INPUTS/OUTPUTS. Next, under SETPOINTS > S4 CONTROLS > S4 VIRTUAL INPUTS, the user assigns either an On or an Off command to the Virtual Input enabled earlier.Referring to the Virtual Inputs logic diagram below, a Virtual Input type can be selected to be either Self-Reset, or Latched. When Self-Reset is selected, and the command On is executed, the virtual input is evaluated as a pulse at rate of one protection pass. When the Latched type is selected, the On state of the Virtual Input will be latched. SETPOINTS > S5 INPUTS/OUTPUTS > VIRTUAL INPUTS

VI x NAME

Range: 18 CharactersDefault: Virtual IN x

This setting defines a programmable name for the Virtual Input.

VI x FUNCTION

Range: Disabled/EnabledDefault: Disabled

The Virtual Input is enabled and ready to be triggered when set to Enabled.

VI x TYPE

Range: Self-Reset, LatchedDefault: Self-reset

When the Self-Reset type is selected, the Virtual Input will be evaluated for one protection pass only, upon “On” initiation and it will reset. When the Latched type is selected, the virtual input will keep the state “On” until reset command “Off” is initiated.

NOTE

NOTE: See also the Virtual Inputs section under S4 CONTROLS, on how to trigger a virtual input signal state.

Figure 17: Virtual Inputs Scheme - logic diagram

SETTING

V INPUT FUNCTION

Enabled = 1

Disabled = 0

AND“Virtual Input 1 to ON = 1”

“Virtual Input 1 to OFF = 1” AND

SETTING

V INPUT1 TYPE

Self-Reset

LatchedAND

LATCH

S

R

>

OR

SETTING

V INPUT1 NAME:(Operand)

V Input1 Status

891924.cdr


S5 INPUTS/OUTPUTS CHAPTER 5: SETTINGS



Chapter 6: Commands

Digital Energy

Commands

The Voltage Regulator LOWER/RAISE control can be used in three different ways:

• RAISE and LOWER commands from the DGC faceplate pushbuttons or the DGC menu

• Remote RAISE and LOWER control upon energizing of assigned inputs under CONTROLS/REMOTE CONTROL

• RAISE and LOWER commands over serial DNP.

NOTE

NOTE: None of the methods for raising or lowering the cap bank will be executed if the Multilin DGCV control is disabled - i.e. the pushbutton ENABLED/DISABLED is pressed to select DISABLED mode, with the “Disabled” LED lit . The toggling between Auto/Remote, and Manual mode using the corresponding pushbutton is disabled.

RAISE and LOWER from the DGC faceplate pushbuttons or the DGC menuThe RAISE and LOWER pushbuttons from the Multilin DGCV faceplate will be active in either Manual or Auto mode, provided the Multilin DGCV control is enabled (the “Enabled" LED is lit), and no other blocks or switching inhibits are applied.

Figure 1: DGC faceplate pushbuttons

PATH: MAIN MENU > COMMANDS

RAISE

Range: No, YesDefault: No

This setting is used to open the Voltage Regulator from the DGC menu. Selecting “Yes” and pressing the ENTER pushbutton from the keypad initiates an RAISE pulse command. The “Yes” command pulse is set to 50ms.


CHAPTER 6: COMMANDS

LOWER

Range: No, YesDefault: No

This setting is used to lower the Voltage Regulator from the DGC menu. Selecting “Yes” and pressing the ENTER pushbutton from the keypad initiates a LOWER pulse command. The “Yes” command pulse is set to 50ms.

RESET

Range: No, YesDefault: Disabled

This setting is used to reset activated LEDs and any alarms or target messages. Selecting “Yes” and pressing the ENTER pushbutton from the keypad initiates a RESET command. The “Yes” command pulse is set to 50ms.

The Drag Hand Reset setting provides for the selection of an input for remotely resetting the Max and Min tap indications from the tap position indicator. Upon energizing the programmed input, the Maximum and Minimum tap statistic data from the PRODUCT INFO menu will also reset. The command energizes a drag-hand output relay, which when wired to the tap position indicator, applies ~120 V AC to the drag-hands coils.

Remote RAISE and LOWER upon energizing of inputs selected under CONTROLS/REMOTE CONTROLThe Voltage Regulator RAISE and LOWER commands received via the selected inputs, are executed if the DGC Voltage Regulator control is enabled (the “Enabled” LED is lit) and the selected control mode is Auto/Remote (the Auto/Remote LED is lit). The remote RAISE and LOWER commands are blocked if the “Manual” control mode is selected (the “Manual” LED is lit).PATH: CONTROLS > REMOTE CONTROL

REMOTE RAISE

Range: Off, Contact Input, Virtual Input, Virtual OutputDefault: Off

This setting selects an input from a list of inputs, which, when asserted, energizes the “relay #1 Control” output, wired to raise (switch out) the Voltage Regulator. When the selected input is asserted, the “relay #1 control" contact is energized and stays energized until the input drops off.

REMOTE LOWER

Range: Off, Contact Input, Virtual Input, Virtual OutputsDefault: Disabled

This setting selects an input from a list of inputs, which, when asserted, energizes the “relay #2 Control” output, wired to lower (switch in) the Voltage Regulator. When the selected input is asserted, the “relay #2 control contact is energized and stays energized according to the times selected per the Voltage Regulator control logic.

REMOTE RESET

Range: No, Off, Contact Input, Virtual Input, Virtual OutputDefault: Off

This setting is used to reset the LEDs, alarms, and target messages generated during some abnormal Voltage Regulator condition. The setting provides for the selection of an input from a list of inputs, that performs the RESET action upon activation.

RAISE and LOWER commands over DNP addressing, using radioThe RAISE and LOWER command can be initiated from a SCADA or an IED via radio communication. The controlling device maps an OPEN or a CLOSE command to its binary outputs, and transmits them via radio communication to the DGC Voltage Regulator controller. Upon reception, the DGC Voltage Regulator controller executes the appropriate action. The DGC Voltage Regulator controller executes the received commands if the DGC

CHAPTER 6: COMMANDS


Voltage Regulator control is enabled (the “Enabled" LED is lit), and the selected control mode is set to Auto/Remote (the "Auto/Remote" LED is lit). The remote RAISE and LOWER commands via radio are blocked if “Manual” control mode is selected (the “Manual” LED is lit).


CHAPTER 6: COMMANDS



Chapter 7: Maintenance

Digital Energy

Maintenance

The Multilin DGCV device monitors the tap changer and records the minimum and maximum tap positions per day. The Multilin DGCV also monitors the voltage fluctuation and load fluctuation per day in terms of recording minimum and maximum values. These values can also be selected and monitored by configuring in the Multilin DGCV data logger tool, if longer periods of monitoring are desired.

Figure 1: Maintenance Menu

M4 FACTORY SERVICE

ENTER FACT: PSWD

M1 PRODUCT INFO

PRODUCT NAME

ORDER CODE

MAIN FIRMWARE REV

MAIN BUILD DATE

MAIN BUILD TIME

MAIN BOOT REVISION

MAIN BOOT DATE

MAIN BOOT TIME

SERIAL NUMBER

▼

MAINTENANCE

M1 PRODUCT INFO

M2 PRODUCT MAINT

M4 FACTORY SERVICE

M3 STATISTICS

▼

891962.cdr

M3 MIN/MAX PER DAY

MAX VOLTAGE LEVEL

MIN VOLTAGE LEVEL

MAX CURRENT LEVEL

MIN CURRENT LEVEL

▼

M3 COUNTERS

DAILY TAP OPERATNS

TOTAL TAP OPERATNS

▼

M3 STATISTICS

COUNTERS

MIN/MAX PER DAY

MIN/MAX TAPS

CLEAR COUNTERS

▼

M3 MIN/MAX TAPS

MIN TAP POSITION

MAX TAP POSITION

▼

M2 PRODUCT MAINT

TAP POSITION / CAL


M1 PRODUCT INFORMATION CHAPTER 7: MAINTENANCE

M1 Product information

The product information table provides information such as the Multilin DGCV name, order code, firmware revision, boot code, serial number, etc. This is the place where one verifies whether updates have been performed correctly on the device.PATH: MAINTENANCE > M1 PRODUCT INFO

RELAY NAME

Range: alpha-numeric name of up to 18 characters Default: Product Name

ORDER CODEDGCVEHSSABCDG

This screen shows a Multilin DGCV Order Code.

MAIN FIRMWARE REVISION1.10

This screen shows the product Main Firmware Revision.

MAIN BUILD DATEAug 16 2010

This screen shows the product Main Firmware Build Date.

MAIN BUILD TIME16:32:38

This screen shows the product Main Firmware Build Time.

MAIN BOOT REVISION1.20

This screen shows the product Main Boot Code Revision.

MAIN BOOT DATEDec 11 2009

This screen shows the product Main Boot Code Build Date.

MAIN BOOT TIME10:44:54

This screen shows the product Main Boot Code Build Time.

COMM BOOT REVISION1.20

This screen shows the product Comm Boot Code Revision.

COMM BOOT TIME11:47:17

This screen shows the product Comm Boot Code Build Time.

SERIAL NUMBERML0A08M00133

Each product has a unique serial number.

CHAPTER 7: MAINTENANCE M3 STATISTICS


M3 Statistics

CountersThere are two tap changer counters under this tab: DAILY TAP OPERATIONS, and TOTAL TAP OPERATIONS. The DAILY TAP OPERATIONS counter provides information on how many tap operations were made during day period of 24 hours starting from 12:00 am, beginning of the day, until 12:00 am, the beginning of the next day. The counter clears to 0 at 12:00 midnight for each following day. Otherwise this counter can be cleared at any time by issuing a CLEAR COUNTER command.The counter TOTAL TAP OPERATIONS accumulates the tap changer operations every time the tap changer moves the tap. This counter is not cleared on a per day basis. The counter will stop increasing the number of total tap operations beyond 10000. This counter can be cleared at any time by issuing a CLEAR COUNTER command. MIN/MAX per DayThe MIN/MAX PER DAY monitors the minimum and maximum line voltage, as well as the minimum and maximum loads per day, and records these values for the user’s information. These values can be also monitored through the VR Data Logger over a period of time greater than one day. The MIN and MAX information is recorded during a day period of 24 hours starting from 12:00 am, beginning of the day, until 12:00 am, the beginning of the next day. These minimum and maximum values are reset at 12:00 midnight for the following day period. At that time, they are reset to the present line voltage and load current. MIN/MAX TapThe MIN/MAX TAP provides information on the lowest (minimum), and the highest (maximum) tap position reached by the tap changer during one 24-hour day period. These values can be also monitored through the VR Data Logger over a period of time greater than one day. The MIN and MAX tap information is recorded during a 24-hour period of time, starting at 12:00 am, beginning of the day, until 12:00 am, the beginning of the next day. These minimum and maximum values are reset at 12:00 midnight for the following day period. At that time, they are reset to the present tap position.


M3 STATISTICS CHAPTER 7: MAINTENANCE

voltage regulator controller - ge digital energy

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