ehtc o&m-edn.pdf

TARAPUR ATOMIC POWER PROJECT-4 Page 1 of 24 O & M INSTRUCTIONS & FAULT DIAGNOSTICS FOR EHTC REV 00

BHEL DRG.NO. TW/409/1154 07/03

O & M INSTRUCTIONS & FAULT DIAGNOSTICS

FOR

ELECTRO-HYDRAULIC TURBINE CONTROLLER(EHTC)

REV NO.

DATE OF ISSUE

TOTAL NO. OFPAGES

BHEL

PREPARED BY : Amit Pandey, Engineer(D)

APPROVED BY : S.K. Ranganath, Sr. Mgr (D)

(Name, designation & Date)

File Name:


BHEL DRG.NO. TW/409/1154 07/03

REVISION CONTROL SHEET

TITLE: O & M INSTRUCTIONS & FAULT DIAGNOSTICS FORELECTRO-HYDRAULIC TURBINE CONTROLLER

REV DATE DESCRIPTION OF REVISED BY APPROVED BY NO REVISION

00 15/07/03 ORIGINAL ISSUE AMIT PANDEY S.K. RANGANATH


BHEL DRG.NO. TW/409/1154 07/03

INDEX PAGE NO

1.0 INTRODUCTION 41.1 PURPOSE 41.2 REFERENCE DOCUMENTS 52.0 SYSTEM ARCHITCTURE 63.0 OPERATOR INFORMATION 83.1 VISUAL ALARM ANNUNCIATION SYSTEM FACIA 83.2 CONSOLE TILES FOR INDICATION 83.3 CONSOLE INDICATIONS AND OPERATING PUSHBUTTONS 83.4 HMI OWS IN PL-09 AND OIC 5 & 6 104.0 FAULT DIAGNOSTICS 124.1 PROCESS ALARMS 124.2 DIAGNOSTIC SIGNALS 155.0 ABBREVIATIONS USED 18


BHEL DRG.NO. TW/409/1154 07/03

1.0 INTRODUCTION

The subsystem Electro-Hydraulic Turbine Controller (EHTC) isenvisaged with two main components

a) The control implementation which generates valve lift set pointfor the Two Electro Hydraulic Converters EHC-1 and EHC-2.This control implementation consists of Process controls(Speed Control, Valve Lift Control, Main steam MinimumPressure Control) and two independent Position Controllersdriving each of EHCs. Both the controls are identical to eachother.

(This electronic controller part is envisaged in cabinet CJJ01)See fig-1 Page 19 of 24.

b) A Hydraulic system, which positions the valves according to liftSignal, consisting of EHC-1 & EHC-2 and their follow uppistons and servo-motors.

For details of interconnection of electronic controller with hydraulicsystem, refer document Write up on Electro- Hydraulic Turbine controller(EHTC) Doc. No. 41330000486 (NPC Drg. No. TAPP4/64110/5526/DN)

1.1 Purpose:

This document details the information about EHTCimplementation in following areas:

- Subsystem / system architecture- Operator Interfaces viz.

Visual alarm annunciation faciaControl tiles in MCR panel PL-10Operator Work Station in MCR panel PL-09MMI OWS in OIC 5 & 6Process Status & Process Faults

- Detailed information on Process Faults, Fault Diagnosis & alarmtracing and identifying the cause of alarm for Electro-HydraulicTurbine Controller Subsystem.


BHEL DRG.NO. TW/409/1154 07/03

1.2 Reference documentsThe documents related to EHTC subsystems and assisting this documentare listed as below:

a) Write up on Electro- Hydraulic Turbine controller (EHTC) Doc. No.41330000486 (NPC Drg. No. TAPP4/64110/5526/DN/R0)

b) Hardware Design Document for EHTC Doc No. TW/409/1068 (NPCDrg. No. TAPP4/64110/5873/DN/R0)

c) Software Design Document for EHTC Doc No. TW/409/1057 (NPCDrg. No. TAPP4/64110/5860/DN/R0)

d) SIGNAL FLOW DIAGRAM DRG No. 031028SFS105 (NPC DRG.TAPP4/64110/5731/WD)

e) CUBICLE & RACK DIAGRAM DRG No. 3-656-00-01746 (NPCDRG. TAPP4/64110/5728/GA)

f) Function Control Diagram Drg. No. ED031027FC105 (NPCDRG No.TAPP4/64110/5730/ED)

g) EPROM LISTING FOR CJJ01 Doc No. 1001.TCD (NPC DRGNo.TAPP4/64110/5727/ED)

h) MEMORY MAPPING For STATION S105i) PARAMETER LISTING For STATION S105j) Test and Setting Instructions for Cabinet CJJ01, Doc. No.

TI/409/656/01/1006.


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2.0 SYSTEM ARCHITECTURE

Control implementation in CJJ01 cabinet comprises of the following 2 parts:

1. PROCONTROL IMPLEMENTATION: The process controller systemfunction Electro hydraulic Turbine control System is implemented as asingle local bus design in PROCONTROL P13. This part comprises offollowing functions:

a) INPUT ACQUISITION: Speed, load, SGPC Output and Pressuredeviation signals are takeno Speed actual 1,2 & 3 signals are connected to three different

modules Location BA17, CA17 & DA17 Input Module EI05o Load actual 1,2 & 3 signals are connected to three different

modules Location CA31, CA33 & CA35 Input Module EA02o SGPC control O/P 1 & 2 are connected to separate modules

Location CA31 & CA33 Input Module EA02o Pressure deviation 1 & 2 are connected to separate modules

Location CA31 & CA33 Input Module EA02

b) PROCESSING: Field signals acquisition, Limit Value generation &Controller implementations:

o Speed, load, SGPC deviation and pressure deviation signalsare taken and processed in Two out of Three (2V3) or Oneout of Two (1V2) fashion, as applicable. Required limit valuesas well as indication signals are generated.

o Speed Controller implementationo Load Controller implementationo Pressure Controller - HP implementationo Control Selection implementation

c) OUTPUT GENERATION: for position controllers and Generalalarms & COIS interface for TG package controls (hardwired groupalarms)

2. NON-PROCONTROL IMPLEMENTATION: Hardware PositionController for both the EHCs. This hardware control section isenvisaged in Rack EA of cabinet CJJ01.

The signal from control selection circuit (envisaged in Part 1 of above) isoutputted in 2 sets of 3 channels. Middle out of three Position references isselected by voting module.

The system has 2 position measurements for each EHC and MAX of thesepositions is outputted to the Position controller.


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The EHC position controller is a PID controller. Control deviation is derivedfrom position set point and actual lift and forms the input to controller. Theoutput is given to Plunger coil of EHC. The short circuit or grounding of coil isannunciated as Plunger coil fault.

In case of open circuit of plunger coil of one of the EHC, other EHC position controller determines the EHC position.

The interface of Position controllers for EHC-1 & EHC-2 is shown in fig-1 Page 19 of 24.


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088 BW

BA

CD

100000

3.0 OPERATOR INFORMATION

The plant operations are carried out from MCR 6610 PL - 10 panel and HMI OWSin MCR 6610 - PL - 09 and OIC 5 & 6. For operating procedures, refer documentWrite up on Electro- Hydraulic Turbine controller (EHTC) Doc. No. 41330000486(NPC Drg. No. TAPP4/64110/5526/DN/R0).

The information available to operator can be broadly categorized into following:

3.1 VISUAL ALARM ANNUNCIATION SYSTEM FACIA

This is available at the top of MCR 6610 PL - 10 panel. The windowcorresponding to this sub-system is EHC SYSTEM TROUBLE(Annunciation No. 1036, COIS No. 7036, Window No. Y16)

3.2 CONSOLE TILES FOR INDICATION

Digital speed indicator: indicates Turbine actual speedUpper Temperature Margin indicator: indicates upper temperaturemargin range 0-150 deg KLower Temperature Margin indicator: indicates lower temperaturemargin range 0-150 deg K

These are located in Top vertical portion of MCR panel

MCR 6610 PL - 10 VERTICAL PORTION

3.3 CONSOLE INDICATIONS AND OPERATING PUSHBUTTONS

1. Console indicators for Process Parameters! LIFT RATE 0-10% /min! DEVIATION LIFT CONTROL +/- 100%! HP GOV V1 POSITION 0-100%! LIFT SET POINT 0-100%! LIFT SET POINT DELAYED 0-100%


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088

AA

AS

100000

! LIFT SET POINT MAX 0-100%! HP GOV V2 POSITION 0-100%! SPEED SET POINT 0-100%! SPEED SET POINT SPREAD SCALE 0-100%! SPEED SET POINT DELAYED 0-100%! DEVIATION PRESSURE CONTROL +/- 50%! STARTING DEVICE POSITION 0-100%! SPEEDER GEAR POSITION 0-100%

2. Process Status Console Indications! ESV 1 OPEN / CLOSE! ESV 2 OPEN / CLOSE! LIFT SET POINT MANUAL / AUTO! LIFT GRADIENT ON /OFF! LIFT CONTROL ON /OFF! REFERENCE LIMITER STOP! SYNCHRONIZER ON / OFF! SYNCHRONIZER REL / LOCKED! SYNCHRONIZER BLOCKED / STARTED! PRES CTRL IN ACTION / LIFT CTRL IN ACTION / SPD CTRL

IN ACTION! TSE INFLUENCE ON / OFF

3. Operating Pushbuttons! LIFT RATE ON / OFF! LIFT RATE RAISE / LOWER! TSE INFLUENCE ON / OFF! LIFT SET POINT MANUAL / AUTO! LIFT CONTROL ON /OFF! LIFT SET POINT RAISE / LOWER! LIFT SET POINT MAX RAISE / LOWER! SPEED SET POINT RAISE / LOWER! STARTING DEVICE OPEN / CLOSE! SPEEDER GEAR OPEN / CLOSE! SET POINT CONT SPD LIFT RELEASE! SYNCHRONIZER REL / LOCK! SYNCHRONIZER ON / OFF

These are located in the Horizontal portion of MCR panel

MCR 661 PL - 10 HORIZONTAL PORTION


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3.4 HMI OWS IN PL-09 AND OIC 5 & 6

1. PLANT PICTURE NO P501: TURBINE CYCLEThis plant picture shows overall Steam path and Parameters of

Inlet Steam, Reheat Steam, Extraction Steam & Turbine Exhaust.Main Control Valves (Governing Valve) & CSDVs positions

alongwith command for Extractionvalves are also given on this picture. Refer fig-3 Page 21 of 24.

2. PLANT PICTURE NO P513: EHTCThis Plant Picture is configured for operators use during rolling,

synchronising, loading by Lift control, loading / unloading by minimum pressure control, Plant shutdown, Load throw off and other conditions.

This Plant picture comprises of all Governing Parameters &status viz. SPEED SET POINT, SPEED SET POINT DELAYED,SPEED CONTROLLER OUTPUT, LIFT RATE, LIFT SET POINT, LIFTSET POINT DELAYED, SGPC OUTPUT CH 1 & CH2, DEVIATIONLIFT CONTROL, LIFT SET POINT MAX, SGPC PR DEVIATION CH1& CH2, DEVIATION PRESSURE CONTROL, MIN PRESSURECONTROLLER OUTPUT, GOVERNERs OUTPUT to POSITIONCONTROLLER, EHC 1 POSN 1 & 2, EHC 2 POSN 1 & 2, HP GOV V1POSITION, HP GOV V2 POSITION, STARTING DEVICE POSITION,SPEEDER GEAR POSITION, TEMP MARGIN UPPER / LOWER,LOAD MARGIN UPPER / LOWER, ESV 1 OPEN / CLOSE, ESV 2OPEN / CLOSE, LIFT SET POINT MANUAL / AUTO, LIFT GRADIENTON /OFF, LIFT CONTROL ON /OFF, REFERENCE LIMITER STOP, PRESCTRL IN ACTION / LIFT CTRL IN ACTION / SPD CTRL IN ACTION,TSEINFLUENCE ON / OFF, EHTS SYSTEM TROUBLE and commandoperations viz. LIFT RATE ON / OFF,LIFT RATE RAISE / LOWER,TSE INFLUENCE ON / OFF, LIFT SET POINT MANUAL / AUTO, LIFTCONTROL ON /OFF, LIFT SET POINT RAISE / LOWER, LIFT SETPOINT MAX RAISE / LOWER, SPEED SET POINT RAISE / LOWER,STARTING DEVICE OPEN / CLOSE, SPEEDER GEAR OPEN /CLOSE.

Links are available to jump to Plant Schematics-! P501: TURBINE CYCLE! P502: TSE METAL TEMPERATURES! P542: EHC SYSTEM TROUBLE! P543: TURBINE STARTUP! P523: TURB STARTUP / SHUTDOWN! P515: TURBINE TRIP STATUS

Refer fig-4 Page 22 of 24.

3. PLANT PICTURE NO P542: EHC SYSTEM TROUBLEUpon occurrence of alarm EHC SYSTEM TROUBLE on

Plant schematic P513, operator can click and come to this Plantschematic. This Plant Schematic shows all the individual componentsleading to group alarm EHC SYSTEM TROUBLE for the ease of


BHEL DRG.NO. TW/409/1154 07/03

tracing the root cause of alarm. Apart from this it also shows vitalgoverning parameters like SPEED ACTUAL CH1, CH2 & CH3, LOAD

ACTUAL CH1, CH2 & CH3, SGPC OUTPUT CH 1 & CH2, SGPC PRDEVIATION Ch1 & Ch2, EHC 1 POSN 1 & 2 and EHC 2 POSN 1 & 2.

Operator can go back to P513: EHTC Plant schematic fromhere. Refer fig-5 Page 23 of 24.

4. PLANT PICTURE NO P543: TURBINE STARTUPThis Plant schematic configured for operators use for Resetting

turbine for startup after a Trip has occurred. This comprises of AuxStartup Fluid, Aux Trip Fluid, Startup Fluid, Aux secondary Fluidparameters and status for Turbine Trip and HP ESV 1 & 2.

Command for STARTING DEVICE OPEN / CLOSE &SPEEDER GEAR OPEN / CLOSE and position for both is also shownon this Plant schematic.

Operator can go back to P513: EHTC & P523: TURBSTARTUP / SHUTDOWN Plant schematics from here. Refer fig-6Page 24 of 24.


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4.0 FAULT DIAGNOSTICSFault Diagnostics of Input, Process and output signals are divided into two

parts -:Process Faults -: These alarms are related to Process Parameters

and are Logged on HMI with Time stamp. Referdetails given in sec. 4.1

Module Diagnostic Faults -: This refers to remote monitoring of ModuleFaults. Refer details given in sec. 4.2

4.1 PROCESS ALARMS / FAULTS

Following process alarms are generated in EHTC subsystem

1. Actual Positions of EHC 1 & 2 signal input fault2. Plunger Coil Fault of EHC 1 & 23. Deviation among two positions > 3% for EHC 1 & 24. Speed Acquisition FAULT5. Load Measurement Deviation6. Pressure Deviation Faulty7. Href Hact for EHC 1 & 2 > 3%8. SGPC Output Faulty

Any of these signals results in a group alarm EHC SYSTEMTROUBLE. The group alarm is made available to COIS as well as AlarmAnnunciation Facia. Group as well as individual alarm is also logged inMMI with time stamping.

These alarms are generated in IdLoop 00MAY01DU005 fordetails please refer Function Control Diagram Drg. No.ED031027FC105 (NPC DRG No.TAPP4/64110/5730/ED) and SoftwareDesign Document for EHTC Doc No. TW/409/1057 (NPC Drg. No.TAPP4/64110/5860/DN).

ALARM / FAULT TRACING

1. Actual Positions of EHC 1 & 2 signal input fault

00MAX45CG001A XQ0700MAX45CG001K XQ0700MAX45CG002A XQ0700MAX45CG002K XQ07

are connected to location EA30, EA01, EA12 & EA14 respectively.Power supply to LVDT transmitter Open-circuit is detected and it isannunciated as module fault. This makes one of the components ofGroup alarm- EHC Trouble. Check for wiring and sensorcorrectness. Still fault persisting then change the module with


BHEL DRG.NO. TW/409/1154 07/03

spare one. The module address and all the switch settings shall bemade in the line with previous module as per test and settinginstructions.

2. Plunger Coil Fault of Electro Hydraulic Converter 1 & 2This alarm comes on coil fault of Electro Hydraulic

Converter or grounding of coil. Check for circuit healthiness. Eventhen fault is persisting, check for Respective AVLAA module atEA09 or EA22. This module generates Plunger Coil Faults wheneither of the floating outputs driving the EHC gets grounded. ForDetails on Module, Refer Procontrol module data sheetsvolume 1-6.

3. Deviation among two positions > 3% for EHC 1 & 2Each EHC has been provided with 2 positions

Measurements-00MAX45CG001A XQ01 addr. EE00MAX45CG001K XQ01 addr. E5and00MAX45CG002A XQ01 addr. E600MAX45CG002K XQ01 addr. EA

are connected to location CA31, CA35, CA35 & CA33respectively. Check process values on SK06 kit. Check formodule faults and wiring correctness. That particular channelmay be checked by feeding 4-20 mAmp signal and checking0-100%. These signals are generated from AKCAA modulesat locations EA30, EA01, EA12 & EA14 respectively. Checkfor wiring and sensor correctness. Still fault persisting thenchange the module with spare one. The module address andall the switch settings shall be made in the line with previousmodule as per test and setting instructions.

4. Href Hact for EHC 1 & 2 > 3%The fault tracing and corrective measure for this fault is alsothe same as given for above point.

5. Speed Acquisition FAULTSpeed actual 1,2 & 3 signals are connected to three differentmodules Location BA17, CA17 & DA17 Input Module EI05 andthat is further processed in middle out of three mode so no singlepoint failure results in loss of control. Any channel fault andDeviation fault is annunciated and this make one of thecomponents of Group alarm- EHC Trouble. The signal flow pathof Speed signals is shown in fig 2 page 20 of 24.


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If any particular channel is giving different value, check thevalues at TMR speed measuring rack GA in cabinet CJJ10. If thevalues are correct there, check the interconnection between CJJ10and CJJ01 and respective EI05 module.

If TMR speed measuring rack GA in cabinet CJJ10 is alsoshowing different values that indicates problem in TMR speedmeasuring rack or in Speed Probe itself. For details of FaultDiagnosis refer O&M instructions for OTSS subsystem (cabinetCJJ10).

6. Load Measurement DeviationLoad actual 1,2 & 3 signals are connected to three differentmodules Location CA31, CA33 & CA35 Input Module EA02 andthat is further processed in middle out of three mode so no singlefailure results in loss of control. Deviation fault is annunciatedand this makes one of the components of Group alarm- EHCTrouble.

On occurrence of deviation fault, Check process values onSK06 kit. Check for module faults and wiring correctness.That particular channel may be checked by feeding 4-20mAmp signal and checking 0-100%. If module is faulty, thenchange the module with spare one. The module addressand all the switch settings shall be made in the line withprevious module as per test and setting instructions.

If the modules are ok, it means that problem is in either CCA09or CJJ05 panel, where the signal is multiplied and Loadmeasurement Unit LMU is mounted. For details of FaultDiagnosis refer O&M instructions for cabinet CCA09.

7. SGPC Pressure Deviation FaultySGPC Pressure deviation 1 & 2 are connected to separatemodules Location CA31 & CA33 Input Module EA02. Anydeviation between two channels is annunciated and faultychannel is taken out of control circuits. Either of Input signalfaults makes one of the components of Group alarm- EHCTrouble.

On occurrence of deviation fault, Check process values onSK06 kit. Check for module faults and wiring correctness. Thatparticular channel may be checked by feeding 4-20 mAmp signaland checking 0-100%. If module is faulty, then change themodule with spare one. The module address and all the switchsettings shall be made in the line with previous module as pertest and setting instructions.


BHEL DRG.NO. TW/409/1154 07/03

8. SGPC controller output FaultySGPC controller O/P 1 & 2 is connected to separate modulesLocation CA31 & CA33 Input Module EA02. Any deviationbetween two channels is annunciated and faulty channel is takenout of control circuits. Either of Input signal faults make one ofthe components of Group alarm- EHC Trouble.

On occurrence of deviation fault, Check process values onSK06 kit. Check for module faults and wiring correctness. Thatparticular channel may be checked by feeding 4-20 mAmp signaland checking 0-100%. If module is faulty, then change themodule with spare one. The module address and all the switchsettings shall be made in the line with previous module as pertest and setting instructions.

4.2 MODULE DIAGNOSTIC FAULTS

Diagnostic Station monitors Group Alarms of module faults originatingfrom each Local Bus. Diagnostic Station is connected to all Local Buses throughIPB (Intra Plant Bus). It consists of a control hardware consisting ofMicrocomputer and Local Bus / IPB interface alongwith a Keyboard, DisplayMonitor and Printer.

The course of action in case of fault is given in Flow chart for Modulefault tracing at page 17 of 24.

The following group alarms are sourced from this subsystem, and areannunciated in Diagnostic station. Messages in different colours for specificGroup Alarms with Source Local Bus identification and time stamp aredisplayed on the monitor. These alarms are printed ONLINE on diagnosticstation.

The maintenance engineer can further look in the Panel CJJ01 forfurther tracing of the Cause of Fault.

IF A PARTICULAR MODULE IS FAULTY, THAT SHALL BEREPLACED ON LINE. THE MODULE ADDRESS AND ALL THE SWITCHSETTINGS SHALL BE MADE IN LINE WITH PREVIOUS MODULE AS PERTEST AND SETTING INSTRUCTIONS.

Various Faults (group alarms) displayed at Diagnostic Station are:

SME0 STATION DISTURBANCE (Bk02 module removed)Action: Check for BK02 module at location DA34 in panel

CJJ01If inserted properly check for connections as persheet no 21 of 28 in CUBICLE & RACK DIAGRAMDRG No. 3-656-00-01746(NPC DRG. TAPP4/64110/5728/GA).

SMA MCC DISTURBANCE (If STA is wired)Not Applicable for this subsystem


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SMR CONTROL DRIVE DISTURBANCE (Analog Drive module: NotApplicable for TAPP)

SMM TORQUE SWITCH OPERATED (DRIVE MODULE)Not Applicable for this subsystem

SMP3 CONTACT DISTURBANCE (DRIVE MODULE)Not Applicable for this subsystem

SMP2 SENSOR DISTURBANCE (EA04 MODULE- INPUT OPEN)Not Applicable for this subsystem

SMZ DRIVE MONITORING TIME EXCEEDED (DRIVE MODULE)Not Applicable for this subsystem

SMD1 DRIVE MODULE INPUT DISTURBANCE; DATA MISSINGNot Applicable for this subsystem

SMV INSERTION MONITORINGThis fault comes when any of the output module, Processingmodule or speed input module is kept out of its rack position.

SMS DRIVE MODULE SIMULATION AT FRONT PANELNot Applicable for this subsystem

SMT TEMPERATURE INADMISSIBLE (>60 DEG C)Action : Check for cabinet temperature and Fan racks. Fans

should be always running. Check for Fan supplies as per sheet no 12 & 18 of 28 in CUBICLE & RACK DIAGRAM DRG No. 3-656-00-01746 (NPC DRG. TAPP4/64110/5728/GA)

SME3 SYSTEM REDUNCY DISTURBANCE (70PR05, 70BV05,POWER SUPPLY)Action : Check that both Processors PR05 at location BA01 &

BA07 and Bus Traffic Directors at location BA35 & BA34 are healthy. For Details on Module Refer Procontrol module data sheets volume 1-6

SME2 MODULE DISTURBANCE (70PR05 & OUTPUT MODULES)Action : Check for modules at location BA01, BA07, BA20,

BA21, CA09, CA10, CA11, CA12, CA19, CA21, CA23, DA01, DA03, DA05, DA07, DA09, DA11, DA13, DA15, DA34, EA01, EA03, EA05, EA07, EA09, EA12, EA14, EA16, EA18, EA20, EA22, EA30, EA32 & EA34. The RED LED at module causing fault will be GLOWING. For Details on Module Refer Procontrol module datasheets volume 1-6.


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SME1 INPUT MODULE DISTURBANCEAction : Check for modules at location BA17, CA06, CA07,

CA08, CA13, CA17, CA29, CA31, CA33, CA35, DA17, DA18, DA19 & DA34. The RED LED at module causing fault will be GLOWING. For Details on Module Refer Procontrol module data sheets volume 1-6.

The alarms SME1, SME2, SME3 and BK02 LINE A / LINE B Faults are alsologged at MMI system for operator information. Operator shall inform MaintenanceEngineer on occurrence of these Faults.

Application specific module wise channel FAULT are listed in section 2.6 ofdocument Hardware Design Document for EHTC Doc No. TW/409/1068 (NPC Drg.No. TAPP4/64110/5873/DN).

PROCESS / HARDWARE HARDWARE ALARM ALARM

NO

YES

ALARM ON MMI

GO TO DIAGNOSTIC STATION

THE LOCAL BUS ADDRESSAND TYPE OF FAULT WILL

BE KNOWN

GOTO PANEL FOR THATLOCAL BUS

PARTICULAR MODULE RED LEDWILL BE GLOWING

HENCE, FAULT IN MODULE

SEE THEDISPLAY

FORFAULTS

CHECK FOR PROCESSVALUE AND DEVICE /

SENSOR OUTPUT

RECALIBRATE THEDEVICE IFREQUIRED

ALARM ONDIAGNOSTIC PRINTER


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5.0 Abbreviations used:

ADC : Analog to Digital ConversionTMR : Triple Modular redundantCOIS : Computerised Operator Information SystemDAC : Digital to Analog ConversionEPROM : Erasable Programmable Read Only MemoryFKB : Function Key BoardI/O : Input, outputMMI : Man Machine Interfacems : MillisecondEHTC : Electro-Hydraulic Turbine ControllerTSE : Turbine Stress Evaluator

ATRS : Automatic Turbine Run up System EHC : Electro hydraulic converter

MCR : Main Control Room OIC : Operator Interface Console SGPC : Steam Generator Pressure Controller OWS : Operator Work Station CSDV : Condenser Steam Dump Valve 1V2 : One out of Two 2V3 : Two out of Three

edn-------------------------------------------------- POSITION CONTROLLER -------------------------------------------

edn

edn

edn

edn

edn

ednINPUTS

ednOUTPUTS

ednPROCESSING

edn+BA17

edn

edn+DA17

edn+CA17

edn+CA31

edn+CA33

edn+CA35

edn EI05

ednEI05

edn EI05

edn EA02

CH 1

CH 2

CH 4

edn EA02

CH 1

edn EA02

CH 1

CH 2

CH 4

ednSPEEDCh 1

ednSPEEDCh 2

ednSPEEDCh 3

edn

ednLOADCh 1

ednLOAD Ch 2

ednLOADCh 3

ednSGPC O/PCh 1

ednSGPC O/PCh 2

ednPRESSDEV Ch 1

ednPRESSDEV Ch 2

ednMID OF THREE SPEED

ednMID OF THREE LOAD

edn SGPC O/P MIN

ednPRESSDEVMAX

ednSPEED, LIFT& MIN PRESSCONTROLLERS

edn

CONTROLSELECTION

edn

edn

edn

edn

edn

edn

edn

edn

edn

edn

edn

edn

edn

ednS1.1 ONFOR MAX

ednS1.1 ONFOR MAX

edn-------------------- PROCONTROL P13 --------------------------

edn

ednFig 1 : Subsystem architecture EHTC

edn

ednTARAPUR ATOMIC POWER PROJECT-4 Page 19 of 24

ednO & M INSTRUCTIONS & FAULT DIAGNOSTICS

ednFOR EHTC REV 00

ednBHEL DRG.NO. TW/409/1154 07/03

edn

edn

ednPlunger Coil OFF

ednPlunger Coil OFF

edn2V3

edn2V3

edn*

edn*

edn* POSITION CONTROLLER

ednHARDWARE

edn

edn

ednTARAPUR ATOMIC POWER PROJECT-4 Page 20 of 24

ednO & M INSTRUCTIONS & FAULT DIAGNOSTICS

ednFOR EHTC REV 00

edn

edn

ednBHEL DRG.NO. TW/409/1154 07/03

ednFig 2 : SIGNAL FLOW OF SPEED


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Fig 3: PLANT SCHEMATIC P501


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BHEL DRG.NO. TW/409/1154 07/03


REV NO.(Name, designation & Date)File Name:REVISION CONTROL SHEET

ELECTRO-HYDRAULIC TURBINE CONTROLLERINDEX

ehtc o&m-edn.pdf

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