DLFLine Differential Protection(ZIV e-NET flex family)

Line Differential Protection with Distance Backup. Both units are suitable for lines of any Voltage Level, Overhead or Under Ground, Multiterminal, and Single or Parallel Circuits

The DLF includes all the protection, control and measurement functions for a power line with or without Series Compensation, Single or Double Breaker, and Single Pole or Three Pole Tripping.The fast Differential Unit, complemented by the External Fault Detector and the Capacitive Current Compensation unit, protects lines with up to 5 terminals, even with a transformer in the protection zone, providing excellent reliability even in the most adverse conditions.The Breaker Failure Protection and Synchrocheck can supervise Two Circuit Breakers. Also, the Recloser function allows sequential breaker closing using a master-slave scheme.

General Characteristics 9 Powerful programable logic. 9 2000 event log. Up to 100 oscillography seconds. 9 Alphanumeric or graphic display. 9 Easy HW expansion without FW updates. 9 Can be used to protect multiple bays. 9 Up to 20 analog channels, 160 DI, 80 DO, and 22 LEDs.

9 Bonding, RSTP, PRP and HSR Redundancy. 9 IEC 61850 Ed. 2, DNP3, Modbus RTU and PROCOME protocols.

9 Native process bus. Analog input cards operate as Merging Units for the CPU. Synchronized samples at 4800 Hz (as per IEC 61869-9).

9 Cybersecurity in accordance with IEC 62351 and IEEE 1686-2013 standards. RBAC, secure keys, physical and logical port disabling, cybersecurity event log, and securing of management protocols (PROCOME, HTTPS, SFTP, SSH).

9 Time synchronization by IRIG-B, SNTP and PTP (Ordinary Clock / Transparent Clock).

Making the Smart Grid Real

Phase Differential UnitConfigurable with up to six three-phase current inputs, to protect up to 5-terminal lines with single breakers, and 3-terminal lines with breaker-and-a-half.Neutral, Negative and Positive Sequencess Differential UnitsIncreases sensitivity during internal faults with low current contribution, such as very resistive faults, which may not be detected by the differential phase unit.External Fault DetectorBlocks the differential unit against external faults with very high CT saturation, providing exceptional security. Capacitive Current Compensation The differential unit maintains good sensitivity in cables and very long overhead lines.Transformer-Line Protection Zone Multi-Terminal Fault Locator 8 Distance zones Reversible distance zones with Mho or quadrilateral characteristic. Independent characteristic selection for ground and phase-to-phase faults.Communication between IEDs• Up to 4 ports: Communication without redundancy with

up to 4 remote ends or with redundancy with up to 2 remote ends.

• Selectable speed: from 1 x 64 kbit/s up to 2 Mbit/s.• Multimode or single mode FO interfaces (optional SFPs).• Communication with SDH multiplexers via C37.94 or

via ZIV model F2MUX optical-electric converter that integrates G703 output interfaces.

• Up to 16 digital signals can be exchanged between terminals to implement teleprotection schemes.

Characteristics Protection UnitsANSI FUNCTIONS87PH Restrained phase differential 1

87PH/50 Unrestrained phase differential 187N Restrained neutral differential 1

87POS Restrained positive seq. differential 187NEG Restrained negative seq. differential 187/50FD Fault detector 1

27FD Fault detector on weak infeed 187P External fault detector 1

64REF Restricted earth fault 150OF Close-on-fault detector 150/51 Phase OC 3/3

50N/51N Neutral OC 3/350Q/51Q Negative-sequence instantaneous OC 3/350G/51G Ground OC (ground channel measurement) 3/350STUB Stub bus protection 050V/51V Instantaneous voltage restrained OC 3/3

67 Phase directional 167N Neutral directional 167G Ground directional 167P Positive-sequence directional 167Q Negative-sequence directional 1

Harmonic Blocking 149W Line thermal image 126 Hot-spot thermal image 1

50OL/51OL Overload instantaneous OC 127 Phase undervoltage 359 Phase overvoltage 3

59N Neutral overvoltage 347 Negative Sequence Overvoltage 164 Ground overvoltage 3

81M Overfrequency 481m Underfrequency 481D Frequency Ratio of change 4

Load shedding 159V/Hz Overexcitation 4

25 Synchrocheck 250BF Breaker failure 1

Cold load 121N Ground distance 8 zones 21P Phase distance 8 zones

50SUP Distance overcurrent supervision 1Load encroachment 1

85-21 Teleprotection schemes for distance units 185-67 Teleprotection schemes for overcurrent units 1

Open Phase Detector 1Remote Open Breaker Detector 1

60FF Fuse failure detector 160VT VT supervision 168/78 Power swing detector 160CT CT supervision 1

3 Coil supervision (up to 12)Breaker supervision 1Phase selector 1Open pole detector 1

2 Pole discordance 1Dead line detector 1Saturation detector 1

79 Recloser 1Trip logic and command 1Fault locator 1Multi Far-end Fault locator 1

Two serial ports

Up to4 Ethernet

Ports

Up to 4 Ports (SFP-LC or ST)for line differential protection

ModularDesign

Two frontUSB ports

Hardware Model Selection

DLF

User Interface51 Standard with alphanumeric display.

DI Auxiliary Supply Voltage 6A Selectable by Software.B 24 V

Slot A82 24 - 60 VDC (±20%) 16DIs* + 7 DO + 1 Alm. DO 4 90 - 250 VDC (±20%) and 100 - 240 VAC (-15%/+10%)

16DIs* + 7 DO+ 1 Alm. DO.

Slot B 92 16 DIs* + 7 DO (2DO NA/NC) + 2 IT (-5 to 20mA)3 6 DIs* + 7 DO (2DO NA/NC) + 1 IT (-5 to 20mA) + 1 IT (0-300VDC)

6 17 DO (6DO NA/NC)7 6 DIs* + 6 HSHD DO + 6 DO (2DO NA/NC)

Slot C 100 None.2 16 DIs* + 7 DO (2DO NA/NC) + 2 IT (-5 to 20mA)6 17 DO (6DO NA/NC)

Functionality:4A Single-Breaker 2/3 Terminal Line.

2 Standard with graphic display.

Enclosure/Chassis and Conformal Coat72 6U x 19” 1/2 Rack. Conformal Coated Circuit Boards. Blade Terminal.

4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22

A B Z 0 0 0 0 0 0 -

Communication Interfaces for Relay to Relay Communication (87L/21)200 NoneA 4 x Socket for SFP (GFO LC) B 4 x Multimode GFO ST

ETHERNET Interfaces 1 and 2211 1000BASE-T Connectors (RJ45)3 100BASE-FX Connectors (Multimode GFO ST)

19A RS232 Full Modem - RS232/RS485B RS232 Full Modem - FOC ST

C 2 x Multimode GFO ST - 2 x Socket for SFP (GFO LC)D 2 x Socket for SFP (GFO LC)E 2 x Multimode GFO ST

SLOT CPU Communication Interface 1-2 for Remote Communication (PROCOME, MODBUS, DNP3)DNP3.0)C FOC ST - RS232/RS485D FOC ST - FOC ST

2 1000BASE-SX/LX - 100BASE-FX Slot (socket) for SFP (GFO LC)

ETHERNET Interfaces 3 and 4220 None.1 1000BASE-T Connectors (RJ45)

2 1000BASE-SX/LX - 100BASE-FX Slot (socket) for SFP (GFO LC) 3 100BASE-FX Connectors (Multimode GFO ST)

23 24 25 26 27 28 29 30

* * * * *

Protection240 Initial Version.

Reserved25

230 Without IEC61850Remote Communication Protocols

Firmware Model Selection

2 IEC61850 Ed2

C 48 VD 110 V

5 6U x 19” 1/2 Rack. Conformal Coated Circuit Boards. Ring Lug Terminal.

*DIs distributed in 4 groups (2 Coil Supervision, each one will use one group of 3 DIs).

3 16 DIs* + 7 DO (2DO NA/NC) + 1 IT (-5 to 20mA) + 1 IT (0-300VDC)7 6 DIs* + 6 HSHD DO + 6 DO (2DO NA/NC)

Slot D 11B 5V + 5I

Slot E 12Z Communication board 87L

E 250 V

0 Initial 1 Cyber security

Please visit our website for local information in your areaZIV continually strives to improve products and services. The technical information included in this document is subject to change without notice.

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