TURBINE Logics and Interlocks

GREENESOL POWER SYSTEMS PVT.LIMITED PROJECT: M/S.MADHUCON-2X135MW --------------------------------------------------------------

GREENESOL POWER SYSTEMS (P) LIMITED

PROJECT: M/S.MADHUCON-2X135MW THERMAL POWER PLANT (Phase-I)

TURBINE INTERLOCK & CLOSED LOOP WRITE UP

DOCUMENT NO: 1104-113

REV-0

-------------------------------------------------------------TURBINE INTERLOCK WRITE UP 1

GREENESOL POWER SYSTEMS PVT.LIMITED PROJECT: M/S.MADHUCON-2X135MW -------------------------------------------------------------INDEX

1) MOTORS 1. BOILER FEED WATER PUMP-1 2. VFC LUBE OIL PUMP-1 3. BOILER FEED WATER PUMP-2 4. VFC LUBE OIL PUMP-2 5. CONDENSATE EXTRACTION PUMP-1 6. CONDENSATE EXTRACTION PUMP-2 7. CCW PUMP-1 8. CCW PUMP-2 9. VACCUM PUMP MOTOR-1 & 2 10. HOT WATER PUMP-1 11. HOT WATER PUMP-2 12. CLEAN OIL PUMP 13. DIRTY OIL PUMP 14. GLAND STEAM VENT CONDENSER-1 15. GLAND STEAM VENT CONDENSER-2 16. BALL RECIRCULATION PUMP 17. PURIFICATION PUMP 18. OIL MIST FAN-1 19. OIL MIST FAN-2 20. EMERGENCY OIL PUMP(DC MOTOR) 21. OIL RESERVOIR HEATER 22. HP START UP OIL PUMP 23. AUXILIARY OIL PUMP 24. BARRING GEAR MOTOR 25. JACKING OIL PUMP-1 26. JACKING OIL PUMP-2 27. HP OIL PUMP-1 28. HP OIL PUMP-2

2) MOTORISED VALVES 1. HP SIDE MAIN STEAM BYPASS MOV-LIFT (1044) 2. HP SIDE MAIN STEAM BYPASS MOV –RIGHT (1045) 3. HP SIDE MAIN STEAM MOV – LEFT 4. HP SIDE MAIN STEAM MOV – RIGHT 5. START UP VENT HP SIDE 6. LP SIDE MAIN STEAM MOV– LEFT 7. LP SIDE MAIN STEAM MOV – RIGHT 8. START UP VENT HP SIDE 9. LP SIDE MAIN STEAM DRAIN-LEFT 10. LP SIDE MAIN STEAM DRAIN-RIGHT -------------------------------------------------------------TURBINE INTERLOCK WRITE UP 2

GREENESOL POWER SYSTEMS PVT.LIMITED PROJECT: M/S.MADHUCON-2X135MW -------------------------------------------------------------11. 1ST BLEED MOV 12. 2ND BLEED MOV 13. 3RD BLEED MOV 14. 4TH BLEED MOV 15. BFP-1 DISCHARGE MOV BYPASS 16. BFP-2 DISCHARGE MOV BYPASS 17. HP HEATER-1 BYPASS MOV BYPASS 18. HP HEATER -1 I/L MOV BYPASS 19. HP HEATER-1 O/L MOV BYPASS 20. HP HEATER-2 BYPASS MOV BYPASS 21. HP HEATER-2 I/L MOV BYPASS 22. HP HEATER-2 O/L MOV BYPASS 23. HP SIDE MAIN STEAM – LEFT 24. HP SIDE MAIN STEAM – RIGHT 25. COLD RE HEATER HEADER DRAIN-1 26. COLD RE HEATER HEADER DRAIN-2 27. LP SIDE MAIN STEAM – LEFT 28. LP SIDE MAIN STEAM – RIGHT 29. 5TH BLEED MOV 30. LP HEATER-1 I/L MOV 31. LP HEATER-1 BYPASS MOV 32. LP HEATER-1 O/L MOV 33. LP HEATER-2 I/L MOV 34. LP HEATER-2 BYPASS MOV 35. LP HEATER-2 O/L MOV 36. LP HEATER-3 I/L MOV 37. LP HEATER-3 BYPASS MOV 38. LP HEATER-3 O/L MOV 39. BFP-1 DISCHARGE MOV 40. BFP-2 DISCHARGE MOV 41. HP HEATER-1 I/L MOV 42. HP HEATER-1 BYPASS MOV 43. HP HEATER-1 O/L MOV 44. HP HEATER-2 I/L MOV 45. HP HEATER-2 BYPASS MOV 46. HP HEATER-2 O/L MOV 47. BALL RECIRCULATION SECTION-1 48. BALL RECIRCULATION SECTION-2 49. BALL RECIRCULATION DISCHARGE-1 50. BALL RECIRCULATION DISCHARGE-2 51. VACCUM BREAKER 52. CEP-1 DISCHARGE MOV 53. CEP-2 DISCHARGE MOV 54. MAIN OIL TANK TO DIRTY OIL TANK 55. AUXILIARY STEAM LINE FROM PRDS


GREENESOL POWER SYSTEMS PVT.LIMITED PROJECT: M/S.MADHUCON-2X135MW -------------------------------------------------------------3) SOLENIDE VALVES 1. 2. 3. 4. 5. 6. 7. 8.

DRAIN SOLENOIDE VALVES: (DCV-01 to DCV-08) Spray water to Dump SOV TURBINE EXHAUST HOOD SPRAYING SYSTEM SOV DEAERATOR TO COMMON SURGE TANK SOV (LCV-909). BOP (20-1) SOV-230V AC BOP (20-2) SOV-230V AC EOP (20-1) SOV-230V AC EOP (20-2) SOV-230V AC

4) CONTROL VALVES 1. TEMPERATURE CONTROL IN GLAND SEALING LINE(TCV-905) 2. PRESSURE CONTROL IN CLAND SEALING LINE (PCV-901) 3. TEMPERATURE CONTROL IN PEGGING STEAM LINE (TCV-906) 4. PRESSURE CONTROL IN PEGGING STEAM LINE (PCV-902) 5. GLAND SEALING DRAIN TO LH-1 (FCV-000) 6. TEMPERATURE CONTROL IN AUXILLARY STEAM LINE (TCV-907) 7. PRESSURE CONTROL IN AUXILLARY STEAM LINE (PCV-903) 8. MINIMUM RECIRCULATION TO CONDENSER (FCV-941) 9. CONDENSER TO LP-1(LCV-907) 10.FROM EXPORT CONTROL VALVE TO SURGE TANK ) LCV-908) 11.SURGE TANK TO HOT WELL (LCV-907A) 12.CONDENSETE TO LP HEATER-2 (LCV-904) 13.LP HEATER-1 TO HOTWELL (LCV-904A) 14.LP HEATER-3 TO LP HEATER-2 (LCV-902) 15.LP HEATER-3 TO HOT WELL (LCV-902A) 16.LP HEATER-2 TO LP HEATER-1 (LCV-903) 17.LP HEATER-2 TO HOT WELL (LCV-903A) 18.HP HEATER-2 TO HP HEATER-1 (LCV-905A) 19.HP HEATER-2 TO HP FLASH TANK (LCV-905B) 20.HP HEATER-1 TO DEAERATOR (LCV-906) 21.HP HEATER-1 TO HP FLASH TANK (LCV-906A) 22.LUBE OIL PRESSURE REGULATOR (PRV-910)

5) Turbine Trips from DCS to ETS: 6) TURBINE ALARMS (SOE) in DCS:



7) OPEN LOOPS 8) PERFORMANCE CALCULATION 9) DEH LOGICS 10) EMERGENCY TRIP SYSTEM (ETS)



FUNCTIONAL WRITE UP BOILER FEED WATER PUMP - 1 BFP #1 shall be switched on manually after switching on Aux. Lube oil pump in auto/Manual: Start Permissive (VFC Aux. lube oil pump #1) 1. Lube oil temp. Downstream of heat exchanger not high. a. TE-27A (<55 °C) b. TE-29A (<65 °C) c. TE-33A (<110°C) d. TE-35A (<75°C) 2. Bearing temp. Not high (TE-60A, TE-59A, TE-58A, TE-57A, TE56A, TE-42A) <90°C. 3. DCS mode selected. 4. Ready to start 5. Local stop not active. 6. CCW discharge pressure (PT-982)>3.5Kg/cm2. NOTE: For Lube Oil Temperatures and VFC Lube oil pump-1 Bearing temperatures refer Dovoith coupler document. VOITH COUPLER document no. 306-74010-13230. If Start Permissive OK. Manual Start Mode 1. Start From DCS. Note: Auto or manual selection shall be made manually by operator and forced to Auto selection shall made when BFP#1 trip/OFF shall be auto selection. Auto Start Mode 1. Lube oil pressure (PT-19.2A) <1.1bar when BFP#1 is running. Stop Interlocks (VFC Aux. lube oil pump#1) 1. Lube oil pressure (PT-19.2A)>2.9bar when BFP#1 is running. 2. Trip FB from MCC. 3. DCS stop. Refer Interlock Logic Diagram: 1104-113-A-02.


GREENESOL POWER SYSTEMS PVT.LIMITED PROJECT: M/S.MADHUCON-2X135MW -------------------------------------------------------------Starting permissive (BFP#1) A. BFP #1 Pump in remote (DCS) mode. B. BFP #1 Pump not in trip condition. C. Ready to start permissive from HT breaker D. Local stop not active. E. Auxiliary lube oil pump-1 ON feedback. F. VFC Scoop is in minimum position (<5). G. Lube oil pressure >0.8bar (PT-19A). H. Dearator water level (LAL-916) is not low. I. BFP #1 Pump Suction Valve is in open position (ZSO-3301). J. BFP #1 Pump Discharge MOV is close Position (ZSC-1034). K. BFP #1 Pump discharge bypass MOV close position (ZSC-1034A). L. Boiler Stream Drum Level not high. If Starting Per missives OK. Manual Start 1) Start From DCS. Stop Interlocks (BFP#1) BFP #1 shall be stopped automatically or manually when in remote mode of operation, the conditions are: 1) Any Motor Winding Temperature are HI HI(R, Y, B) >120Deg. 2) Any Motor bearing Temperature are HI HI (DE, NDE) >80Deg. 3) Any Pump Bearing Temperature (NDE, DE, THRUST 1 & 2) are High High (>90deg). 4) Any Vibrations motor or pump (VAHH-901, 902, 903, 904, 905, 906, 907 and 908) are High High. 5) Dearator Water Level (LALL-916) is Low Low. 6) BFP #1 Pump Suction valve is closed (ZSC-3301). 7) BFP #1 Pump Suction Differential Pressure Switch (DPS-901) is high. 8) Any VFC Coupling Bearing temperatures (TE-60.1A, 59.1A, 58.1A, 57.1A, 56.1A, 40A, 41A and 44A) high high. (>95 deg.) 9) Any VFC lube Oil Temperature are high high a. TE-27.1A& 27.2A (60 Deg.) b. TE-29.1A&29.2A (70Deg.) c. TE-33.1A&33.2A (130Deg.) d. TE-35.1A & 35.2A (85Deg.) 10) Lube Oil Pressure (PT-19.1A) is less than 0.8bars. 11) Stop from DCS when in remote mode. -------------------------------------------------------------TURBINE INTERLOCK WRITE UP 7

GREENESOL POWER SYSTEMS PVT.LIMITED PROJECT: M/S.MADHUCON-2X135MW -------------------------------------------------------------12) Trip from HT breaker. 13) CCW discharge pressure (PT-982) <2kg/cm2. Refer Interlock Logic Diagram: 1104-113-A-01. NOTE: For Lube Oil Temperatures and VFC Lube oil pump-1 Bearing temperatures refer Dovoith coupler document. VOITH COUPLER document no. 306-74010-13230.

BOILER FEED WATER PUMP - 2 BFP #2 shall be switched on manually after switching on Aux. Lube oil pump in auto/Manual: Start Permissive (VFC Aux. lube oil pump #2) 1. Lube oil temp. Downstream of heat exchanger not high. a. TE-27B (<55 °C) b. TE-29B (<65 °C) c. TE-33B (<110°C) d. TE-35B (<75°C) 2. Bearing temp. Not high (TE-60B, TE-59B, TE-58B, TE-57B, TE56B, TE-42B) <90°C. 3. DCS mode selected. 4. Ready to start 5. Local stop not active. 6. CCW discharge pressure (PT-982)>3.5Kg/cm2. NOTE: For Lube Oil Temperatures and VFC Lube oil pump-2 Bearing temperatures refer Dovoith coupler document. VOITH COUPLER document no. 306-74010-13230. If start Permissive Ok. Manual Start Mode 1. Start From DCS. Auto Start Mode Note: Auto or manual selection shall be made manually by operator and forced to Auto selection shall made when BFP #2 trip/OFF shall be auto selection. 1. Lube oil pressure (PT-19.2B) <1.1bar when BFP#2 is running. Stop Interlocks (VFC Aux. lube oil pump#2) -------------------------------------------------------------TURBINE INTERLOCK WRITE UP 8

GREENESOL POWER SYSTEMS PVT.LIMITED PROJECT: M/S.MADHUCON-2X135MW -------------------------------------------------------------1. Lube oil pressure (PT-19.2B)>2.9bar when BFP#2 is running. 2. Trip FB from MCC. 3. DCS stop. Refer Interlock Logic Diagram: 1104-113-A-04. Starting permissive (BFP#2) 2. BFP #2 Pump in remote (DCS) mode. 3. BFP #2 Pump not in trip condition. 4. Ready to start permissive from HT breaker 5. Local stop not active. 6. Auxiliary lube oil pump-2 ON feedback. 7. VFC Scoop is in minimum position (<5). 8. Lube oil pressure >0.8bar (PT-19B). 9. Dearator water level (LAL-916) is not low. 10. BFP #2 Pump Suction Valve is in open position (ZSO-3302). 11. BFP #2 Pump Discharge MOV is close Position (ZSC-1035). 12. BFP #2 Pump Discharge bypass MOV close position (ZSC1035A). 13. Boiler Stream Drum Level not high. If starting per missives Ok. Manual Start 1) Start From DCS. Stop Interlocks (BFP#2) BFP #2 shall be stopped automatically or manually when in remote mode of operation, the conditions are: 1. Any Motor Winding Temperature are HI HI(R, Y, B) >120Deg. 2. Any Motor bearing Temperature are HI HI (DE, NDE) >80Deg. 3. Any Pump Bearing Temperature (NDE, DE, THRUST 1 & 2) are High High (>90deg). 4. Any Vibrations motor or pump (VAHH-909, 910, 911, 912, 913, 914, 915 and 916) are High High. 5. Dearator Water Level (LALL-916) is Low Low. 6. BFP #1 Pump Suction valve is closed (ZSC-3302). 7. BFP #1 Pump Suction Differential Pressure Switch (DPS-902) is high. 8. Any VFC Coupling Bearing temperatures (TE-60.1B, 59.1B, 58.1B, 57.1B, 56.1B, 40B, 41B and 44AB high high. (>95 deg.) 9. Any VFC lube Oil Temperature are high high a. TE-27.1B & 27.2B (60 Deg.) b. TE-29.1B & 29.2B (70Deg.) -------------------------------------------------------------TURBINE INTERLOCK WRITE UP 9

GREENESOL POWER SYSTEMS PVT.LIMITED PROJECT: M/S.MADHUCON-2X135MW -------------------------------------------------------------c. TE-33.1B & 33.2B (130Deg.) d. TE-35.1B & 35.2B (85Deg.) 10. Lube Oil Pressure (PT-19.1B) is less than 0.8bars. 11. Stop from DCS when in remote mode. 12. Trip from HT breaker. 13. CCW discharge pressure (PT-982) <2kg/cm2. Refer Interlock Logic Diagram: 1104-113-A-03.

NOTE: For Lube Oil Temperatures and VFC Lube oil pump-2 Bearing temperatures refer VOITH coupler document. VOITH COUPLER document no. 306-74010-13230.



CONDENSATE EXTRACTION PUMP -1 Condensate Extraction Pump-1 shall be switched on from DCS either in Manual mode or Auto mode, which can be selected by using soft selector switch. Starting Per missives (CEP#1) 1) Hot well level (LALL-912) not low low. 2) Condensate Extraction Pump-1 Suction Valve (ZSO-902) is in open position. 3) CEP Pump-1 in remote (DCS) mode. 4) CEP Pump-1 not in trip condition from VFD. 5) Ready to start permissive from VFD. 6) Local stop not active. 7) Discharge MOV (1023) in close FB. If Start Per missives are OK. Manual Start mode 1. Start from DCS Auto Start mode 1. CEP-2 trip FB from VFD. 2. Discharge header pressure low(PS-941) 3. Hot well level high (LAH-912)

Stop Interlocks (CEP-1) 1) 2) 3) 4) 5)

Hot well level (LALL-912) low low. CEP #1 Motor any Winding (R, Y and B) temperature>120 Deg. CEP#1 Motor any Bearing (NDE and DE) temperatures>90 Deg. Trip FB from VFD Stop from DCS

Refer Interlock Logic Diagram: 1104-113-A-05.



CONDENSATE EXTRACTION PUMP -2 Condensate Extraction Pump-2 shall be switched on from DCS either in Manual mode or Auto mode, which can be selected by using soft selector switch. Starting Per missives (CEP#2) 1. Hot well level (LALL-912) not low low. 1. Condensate Extraction Pump-1 Suction Valve (ZSO-904) is in open position. 2. CEP Pump-2 in remote (DCS) mode. 3. CEP Pump-2 not in trip condition from VFD. 4. Ready to start permissive from VFD. 5. Local stop not active. 6. Discharge MOV (1024) in close FB. If start per missives Ok. Manual Start mode 1. Start from DCS Auto Start mode 1. CEP-1 trip FB from VFD. 2. Discharge header pressure low(PS-941) 3. Hot well level high (LAH-912) Stop Interlocks (CEP-2) 1) 2) 3) 4) 5)

Hot well level (LALL-912) low low. CEP #2 Motor any Winding (R, Y and B) temperature>120 Deg. CEP #2 Motor any Bearing (NDE and DE) temperatures>90 Deg. Trip FB from VFD Stop from DCS




CCW PUMP -1 CCW Pump-1 shall be switched on from DCS either in Manual mode. Starting Per missives (CCWP#1)-Manual mode 1. 2. 3. 4. 5.

Common surge tank level (LT-901A) not low (>25%). CCW Pump-1 in remote (DCS) mode. CCW Pump-1 not in trip condition from HT Breaker. Ready to start from HT breaker. Local stop not active.

If start per missives OK. Manual Start 1. Start from DCS. Stop Interlocks (CCWP-1)-Manual Mode 1. Common surge tank level (LT-901A) low (<25%). 2. CCWP #1 Motor any Winding (R, Y and B) temperature>120 Deg. 3. CCWP#1 Motor any Bearing (NDE and DE) temperatures>90 Deg. 4. Trip FB from HT breaker. 5. Stop form DCS. Refer Interlock Logic Diagram: 1104-113-A-07.

CCW PUMP -2 CCW Pump-2 shall be switched on from DCS either in Manual mode. Starting Per missives (CCWP#2)-Manual mode 1. 2. 3. 4. 5.

Common surge tank level (LT-901A) not low (>25%). CCW Pump-2 in remote (DCS) mode. CCW Pump-2 not in trip condition from HT Breaker. Ready to start from HT breaker. Local stop not active.


GREENESOL POWER SYSTEMS PVT.LIMITED PROJECT: M/S.MADHUCON-2X135MW -------------------------------------------------------------If start per missives are OK. Manual Mode 1. Start from DCS. Stop Interlocks (CCWP-2)-Manual Mode 1. Common surge tank level (LT-901A) low (<25%). 2. CCWP #2 Motor any Winding (R, Y and B) temperature>120 Deg. 3. CCWP#2 Motor any Bearing (NDE and DE) temperatures>90 Deg. 4. Trip FB from HT breaker. 5. Stop form DCS.

Refer Interlock Logic Diagram: 1104-113-A-O8. VACCUM PUMP MOTOR-1& 2 and Recirculation Motor 1&2: Please refer document Edwards contract no: NXP518000&NXP519000.

HOT WATER PUMP -1 Hot water Pump-1 shall be switched on from DCS either in Manual mode or Auto mode, which can be selected by using soft selector switch. Starting Per missives (HWP#1) 1. LP Heater-1 level (LAL-906) not low low. 2. HW Pump-1 in remote (DCS) mode. 3. HWP Pump-1 not in trip condition from MCC. 4. Ready to start permissive from MCC. 5. Local stop not active. If starting per missives are OK Manual Start mode 1. Start from DCS -------------------------------------------------------------TURBINE INTERLOCK WRITE UP 14

GREENESOL POWER SYSTEMS PVT.LIMITED PROJECT: M/S.MADHUCON-2X135MW -------------------------------------------------------------Auto Start mode 1. HWP-2 trip FB from MCC. 2. LP Heater level-1 high (LAH-907) Stop Interlocks (HWP-1) 1. LP Heater-1 level (LAL-906) low low. 2. Trip FB from MCC 3. Stop from DCS Refer Interlock Logic Diagram: 1104-113-A-09.

HOT WATER PUMP -2 Hot water Pump-2 shall be switched on from DCS either in Manual mode or Auto mode, which can be selected by using soft selector switch. Starting Per missives (HWP#2) 1. 2. 3. 4. 5.

LP Heater-1 level (LAL-906) not low low. HW Pump-2 in remote (DCS) mode. HWP Pump-2 not in trip condition from MCC. Ready to start permissive from MCC. Local stop not active.

If starting per missives are OK Manual Start mode 1. Start from DCS Auto Start mode 1. HWP-1 trip FB from MCC. 2. LP Heater level-1 high (LAH-907) Stop Interlocks (HWP-2) 1. LP Heater-1 level (LAL-906) low low. 2. Trip FB from MCC 3. Stop from DCS Refer Interlock Logic Diagram: 1104-113-A-10.

CLEAN OIL PUMP -------------------------------------------------------------TURBINE INTERLOCK WRITE UP 15

GREENESOL POWER SYSTEMS PVT.LIMITED PROJECT: M/S.MADHUCON-2X135MW -------------------------------------------------------------COP shall be switched on manually, only when the following Conditions are satisfied: Starting Per missives (COP)-Manual mode 1) 2) 3) 4) 5)

Cleaning oil tank level (LAL-901A) not low. COP in remote mode. COP not in trip condition. Ready to start from MCC. Local stop not active.

If starting per missives are OK Manual Mode 1) Start from DCS. Stop Interlocks (COP) 1) 2) 3) 4)

Cleaning oil tank level (LAL-901A) is low. Unit-1 Main oil tank level high(LTI-133) Unit-2 Main oil tank level high(LTI-133) Stop from DCS.


DIRTY OIL PUMP DOP shall be switched on manually, only when the following Conditions are satisfied: Starting Per missives (DOP)-Manual mode 1. 2. 3) 4) 5)

Dirty oil tank level (LAL-901) not low. DOP in remote mode. DOP not in trip condition. Ready to start from MCC. Local stop not active.

If starting per missives are OK Manual Mode 1) Start from DCS. Stop Interlocks (DOP) 1. Dirty oil tank level (LAL-901) is low. 2. Unit-1 Main oil tank level high(LTI-133) -------------------------------------------------------------TURBINE INTERLOCK WRITE UP 16

GREENESOL POWER SYSTEMS PVT.LIMITED PROJECT: M/S.MADHUCON-2X135MW -------------------------------------------------------------3. Unit-2 Main oil tank level high(LTI-133) 4. Stop from DCS. Refer Interlock Logic Diagram: 1104-113-A-12.

Gland steam vents condenser FAN-1: GSVC-1 shall be switched on manually, only when the following Conditions are satisfied: Starting Per missives (GSVC-1)-Manual mode 1. 2. 3. 4.

GSVC-1 in remote mode. GSVC-1 not in trip condition. Ready to start from MCC. Local stop not active.

If starting per missives are OK Manual Mode 1) Start from DCS. Stop Interlocks (GSVC-1) 1. GSVC-1 stop from DCS. Refer Interlock Logic Diagram: 1104-113-A-13.

Gland steam vents condenser FAN-2: GSVC-2 shall be switched on manually, only when the following Conditions are satisfied: Starting Per missives (GSVC-2)-Manual mode 1. 2. 3. 4.

GSVC-2 in remote mode. GSVC-2 not in trip condition. Ready to start from MCC. Local stop not active.

If starting per missives are OK Manual Mode 1) Start from DCS. Stop Interlocks (GSVC-2) 1. GSVC-2 stop from DCS. Refer Interlock Logic Diagram: 1104-113-A-14. -------------------------------------------------------------TURBINE INTERLOCK WRITE UP 17

GREENESOL POWER SYSTEMS PVT.LIMITED PROJECT: M/S.MADHUCON-2X135MW -------------------------------------------------------------Ball Recirculation Pump: This motor is PLC based controlled not from DCS. Purification Pump: This motor is PLC based controlled not from DCS. Oil mist FAN-1: OMF-1 shall be switched on manually, only when the following Conditions are satisfied: Starting Per missives (OMF-1)-Manual mode 1. 2. 3. 4.

OMF-1 in remote mode. OMF-1 not in trip condition. Ready to start from MCC. Local stop not active.

If starting per missives are OK Manual Mode 1) Start from DCS. Stop Interlocks (OMF-1) 1. OMF-1 stop from DCS. Refer Interlock Logic Diagram: 1104-113-A-15. Oil mist FAN-2: OMF-2 shall be switched on manually, only when the following Conditions are satisfied: Starting Per missives (OMF-2)-Manual mode 1. 2. 3. 4.

OMF-2 in remote mode. OMF-2 not in trip condition. Ready to start from MCC. Local stop not active.

If starting per missives are OK Manual Mode 1) Start from DCS. Stop Interlocks (OMF-2) 1. OMF-2 stop from DCS. -------------------------------------------------------------TURBINE INTERLOCK WRITE UP 18

GREENESOL POWER SYSTEMS PVT.LIMITED PROJECT: M/S.MADHUCON-2X135MW -------------------------------------------------------------Refer Interlock Logic Diagram: 1104-113-A-16.

EMERGENCY OIL PUMP (DC MOTOR) Starting Per missives (EOP)-Auto mode 1. EOP DC Supply ON. 2. FFR NOT OPERATED. 3. Local stop not active. 4. Ready to start from EOP panel If starting per missives are OK Manual Mode 1) Start from DCS. Auto Mode 1. EOP inlet Lube Oil Pressure (PS-63/1-EOP) is low. OR 2. EOP inlet Lube Oil Pressure (PS-23/2-EOP) is low. Stop Interlocks (EOP) 1. Stop from DCS. Refer Interlock Logic Diagram: 1104-113-A-17. OIL RESERVOIR HEATER Oil reservoir heater shall be switched on from DCS either in Manual mode or Auto mode, which can be selected by using soft selector switch. Starting Per missives (ORH): 1. Ready to start permissive from MCC. 2. Local stop not active. Manual Start mode 1. Start from DCS Auto Start mode 1. ORH no trip condition from MCC. 2. Lube oil temperature (TE-22) <23Deg. -------------------------------------------------------------TURBINE INTERLOCK WRITE UP 19

GREENESOL POWER SYSTEMS PVT.LIMITED PROJECT: M/S.MADHUCON-2X135MW -------------------------------------------------------------Stop Interlocks (ORH): 1. Lube oil temperature (TE-22) >28Deg. 2. Trip FB from MCC 3. Stop from DCS Refer Interlock Logic Diagram: 1104-113-A-18.

HP START UP OIL PUMP SOP shall be started in Manual mode, When SOP shall Be selected in remote mode of operation. Local / remote selection Shall be from DCS only. Starting Per missives (HP SOP)-Manual mode 1. Ready to start from DCS 2. Local stop not active. If starting per missives are OK Manual Mode 1) Start from DCS. Stop Interlocks (HP SOP) 1. Stop from DCS 2. Trip FB from MCC 3. Turbine reaches rated RPM (3000 RPM) with delay of 3S time. Refer Interlock Logic Diagram: 1104-113-A-19.

AUXILARY OIL PUMP AOP shall be started in Auto/Manual mode, When AOP shall Be selected in remote mode of operation. Local / remote selection Shall be from DCS only. Starting Permissive (AOP)1. Ready to start from DCS 2. Local stop not active. If starting pre missives are OK Manual Start mode -------------------------------------------------------------TURBINE INTERLOCK WRITE UP 20

GREENESOL POWER SYSTEMS PVT.LIMITED PROJECT: M/S.MADHUCON-2X135MW -------------------------------------------------------------1. Start from DCS. Auto Start mode 1. AOP Lube Oil Pressure (PS-63/1 BOP) is low. OR 2. AOP Lube Oil Pressure (PS-63/2 BOP) is low. NOTE: AOP forcedly shall made select to auto mode when turbine trips. Stop Interlocks (AOP) 1. Stop from DCS 2. Trip FB from MCC Refer Interlock Logic Diagram: 1104-113-A-20.

BARRING GEAR MOTOR

BGM shall be started in Manual mode, When BGM shall Be selected in remote mode of operation from BGM panel. BGM shall be switched on manually, only when the following Conditions are satisfied: Starting Permissive (BGM)-Manual mode 1. Lube Oil Header Pressure switch (PIS-317) is not low. 2. Turbine Speed Zero (from TSI panel). If starting per missives are OK Manual Mode 1. Start from DCS. Stop Interlocks (AOP) 1. Lube Oil Header Pressure Switch (PIS-317) is low. 2. Stop from DCS. Refer Interlock Logic Diagram: 1104-113-A-21.

JACKING OIL PUMP-1 JOP #1 shall be started in Auto/Manual mode. -------------------------------------------------------------TURBINE INTERLOCK WRITE UP 21

GREENESOL POWER SYSTEMS PVT.LIMITED PROJECT: M/S.MADHUCON-2X135MW -------------------------------------------------------------Starting Permissive (JOP-1)1. Lube oil header pressure (PT-128)>0.9 kg/cm2. Manual mode 1. Start from DCS. Auto mode 1) Jacking Oil Device Pressure (PS-505) is Low. 2) Jack Oil Pump-2 Stop. 3) Turbine speed<600RPM Stop Interlocks (JOP-1) 1) Stop from DCS 2) Lube oil header pressure (PT-128) <0.9 kg/cm2. 3) Turbine speed >1200RPM Refer Interlock Logic Diagram: 1104-113-A-22.

JACKING OIL PUMP-2 JOP #2 shall be started in Auto/Manual mode. Starting Permissive (JOP-2)1. Lube oil header pressure (PT-128)>0.9 kg/cm2. Manual mode 1. Start from DCS Auto mode 1. Jacking Oil Device Pressure (PS-505) is Low. 2. Jack Oil Pump-1 Stop. 3. Turbine speed<600RPM Stop Interlocks (JOP-2) 1. Stop from DCS 2. Lube oil header pressure (PT-128) <0.9 kg/cm2. 3. Turbine speed >1200RPM Refer Interlock Logic Diagram: 1104-113-A-23.


GREENESOL POWER SYSTEMS PVT.LIMITED PROJECT: M/S.MADHUCON-2X135MW -------------------------------------------------------------HP OIL PUMP-1 HOP #1 shall be started when HOP #1 selected to remote mode from EH panel. Starting Permissive (HP PUMP-1) 1) DCS mode selected from EH panel 2) 220V AC OK from EH panel 3) Int.lock enable from EH panel If starting per missives are OK Manual Start mode 1) Start from DCS Auto Start mode 1. PS-63/LP. 2. HP Oil Pump-2 Stop. 3. PS-63/MP. Stop Interlocks (HP PUMP-1) 1. DCS mode not selected 2. EH oil tank level <230mm. 3. EH oil temp <20 Deg. 4. Stop from DCS Refer Interlock Logic Diagram: 1104-113-A-24.

HP OIL PUMP-2 HOP #2 shall be started when HOP #1 selected to remote mode from EH panel. Starting Permissive (HP PUMP-2)1. DCS mode selected from EH panel 2. 220V AC OK from EH panel 3. Int.lock enable from EH panel If starting per missives are OK Manual mode 1. Start from DCS Auto mode 1. PS-63/LP. 2. HP Oil Pump-1 Stop. -------------------------------------------------------------TURBINE INTERLOCK WRITE UP 23

GREENESOL POWER SYSTEMS PVT.LIMITED PROJECT: M/S.MADHUCON-2X135MW -------------------------------------------------------------3. PS-63/MP. Stop 1. 2. 3. 4.

Interlocks (HP PUMP-2) DCS mode not selected EH oil tank level <230mm. EH oil temp <20 Deg. Stop from DCS


TURBINE MOTORISED VALVES 1) HP SIDE MAIN STEAM BYPASS MOV-LEFT (1044)

1) 2) 3) 4) 5)

MOV-1044 in remote (DCS) mode. MOV-1044 not in trip condition. MOV-1044 Close Command not Active. Stop - not active. Local Push Button is in release condition.

The above Conditions are satisfied 1) Open Command from DCS. 2) Close Command from DCS. Refer Interlock Logic Diagram: 1104-113-04. 2) HP SIDE MAIN STEAM BYPASS MOV-RIGHT (1045)

1) 2) 3) 4) 5)


The above Conditions are satisfied 1) Open Command from DCS. 2) Close Command from DCS. Refer Interlock Logic Diagram: 1104-113-05.


GREENESOL POWER SYSTEMS PVT.LIMITED PROJECT: M/S.MADHUCON-2X135MW -------------------------------------------------------------3) HP SIDE MAIN STEAM DRAIN MOV-LEFT (1004)

1) 2) 3) 4) 5)


The above Conditions are satisfied 1) Open Command from DCS. 2) Close Command from DCS. Refer Interlock Logic Diagram: 1104-113-06.

4) HP SIDE MAIN STEAM BYPASS MOV-LEFT (1005)

1) 2) 3) 4) 5)


The above Conditions are satisfied 1) Open Command from DCS. 2) Close Command from DCS. Refer Interlock Logic Diagram: 1104-113-07. 5) START UP VENT HP SIDE (1015) 1) 2) 3) 4) 5)


The above Conditions are satisfied 1) Open Command from DCS. 2) Close Command from DCS. . -------------------------------------------------------------TURBINE INTERLOCK WRITE UP 25

GREENESOL POWER SYSTEMS PVT.LIMITED PROJECT: M/S.MADHUCON-2X135MW -------------------------------------------------------------Refer Interlock Logic Diagram: 1104-113-08. 6) LP SIDE MAIN STEAM BYPASS MOV-LEFT (1048)

1) 2) 3) 4) 5)


The above Conditions are satisfied 1) Open Command from DCS. 2) Close Command from DCS. Refer Interlock Logic Diagram: 1104-113-09. 7) LP SIDE MAIN STEAM BYPASS MOV-LEFT (1049)

1) 2) 3) 4) 5)


The above Conditions are satisfied 1) Open Command from DCS. 2) Close Command from DCS. Refer Interlock Logic Diagram: 1104-113-10. 8) START UP VENT LP SIDE (1015A)

1) 2) 3) 4) 5)

MOV-1015A in remote (DCS) mode. MOV-1015A not in trip condition. MOV-1015A Close Command not Active. Stop - not active. Local Push Button is in release condition.

The above Conditions are satisfied 1) Open Command from DCS. -------------------------------------------------------------TURBINE INTERLOCK WRITE UP 26

GREENESOL POWER SYSTEMS PVT.LIMITED PROJECT: M/S.MADHUCON-2X135MW -------------------------------------------------------------2) Close Command from DCS. Refer Interlock Logic Diagram: 1104-113-11. 9) LP SIDE MAIN STEAM DRAIN MOV-LEFT (1012)

1) 2) 3) 4) 5)


The above Conditions are satisfied 1) Open Command from DCS. 2) Close Command from DCS. Refer Interlock Logic Diagram: 1104-113-12. 10) LP SIDE MAIN STEAM DRAIN MOV-LEFT (1013)

1) 2) 3) 4) 5)


The above Conditions are satisfied 1) Open Command from DCS. 2) Close Command from DCS. Refer Interlock Logic Diagram: 1104-113-13. 11) BLEED -1 to HP Heater-2 (MOV-1018 INCHING TYPE) Bleed#1 MOV shall be opened or closed manually in remote mode (DCS) when the following conditions are occurred. Opening Permissive (Bleed-1 MOV) 1. Remote (DCS) mode selected 2. No trip FB. 3. No Stop FB. 4. No Close Command. 5. Local Push Button is in release condition -------------------------------------------------------------TURBINE INTERLOCK WRITE UP 27

GREENESOL POWER SYSTEMS PVT.LIMITED PROJECT: M/S.MADHUCON-2X135MW -------------------------------------------------------------The above Conditions are satisfied 1) Open Command from DCS. 2) Close Command from DCS. Or HP Heater-2 level high High (LT-905) Refer Interlock Logic Diagram: 1104-113-14.

12) BLEED -2 to HP Heater-1 (MOV-1019 INCHING TYPE) Bleed#2 MOV shall be opened or closed manually in remote mode (DCS) when the following conditions are occurred. 1. Remote (DCS) mode selected 2. No trip FB. 3. No Stop FB. 4. No Close Command. 5. Local Push Button Release Condition 6. The above Conditions are satisfied 1) Open Command from DCS. 2) Close Command from DCS. OR HP Heater-1 level high High (LT-906) Refer Interlock Logic Diagram: 1104-113-15. 13) BLEED -3 to Deaerator (MOV-1020 INCHING TYPE) Bleed#3 MOV shall be opened or closed manually in remote mode (DCS) when the following conditions are occurred. Opening Permissive (Bleed-3 MOV) 1. Remote (DCS) mode selected 2. No trip FB 3. No Stop FB. 4. No Close Command. 5. Local Push Button is in release condition The above Conditions are satisfied 1) Open Command from DCS. -------------------------------------------------------------TURBINE INTERLOCK WRITE UP 28

GREENESOL POWER SYSTEMS PVT.LIMITED PROJECT: M/S.MADHUCON-2X135MW -------------------------------------------------------------2) Close Command from DCS. Refer Interlock Logic Diagram: 1104-113-16. 14) BLEED -4 to LP Heater-3 (MOV-1021 INCHING TYPE) Bleed#4 MOV shall be opened or closed manually in remote mode (DCS) when the following conditions are occurred. Opening Permissive (Bleed-4 MOV) 1. Remote (DCS) mode selected 2. No trip FB 3. No Stop FB. 4. No Close Command. 5. Local Push Button is in release condition The above Conditions are satisfied 1) Open Command from DCS. 2) Close Command from DCS. OR LP Heater-3 level High High(LT-902) Refer Interlock Logic Diagram: 1104-113-17. 15) BFP -1 (Discharge MOV BYPASS-1034A INCHING TYPE) BFP#1 discharge BY PASS MOV shall be opened or closed on automatically or manually in remote mode (DCS) when the following conditions are occurred. Opening Per missives (BFP#1 discharge BYPASS MOV)1. Remote (DCS) mode selected 2. No trip FB 3. No Stop FB. 4. No Close Command. 5. Local Push Button is in release condition Manual Open 1. Open command from DCS. Auto Open 1. BFP#1 VFD ON FB with 1s delays open 20% with reference of position FB. Closing Per missives (BFP#1 discharge BYPASS MOV)-------------------------------------------------------------TURBINE INTERLOCK WRITE UP 29

GREENESOL POWER SYSTEMS PVT.LIMITED PROJECT: M/S.MADHUCON-2X135MW -------------------------------------------------------------Manual Close 1. Close command from DCS. Auto Close 1. BFP#1 discharge MOV (1034) open FB with 3s delays BFP-1 discharge Bypass MOV closing. . Refer Interlock Logic Diagram: 1104-113-18. 16) BFP -2 (Discharge MOV BYPASS-1035A INCHING TYPE) BFP #2 discharge BY PASS MOV shall be opened or closed on automatically or manually in remote mode (DCS) when the following conditions are occurred. Opening Per missives (BFP#2 discharge BYPASS MOV) 1. Remote (DCS) mode selected 2. No trip FB 3. No Stop FB. 4. No Close Command. 5. Local Push Button is in release condition Manual Open 1. Open command from DCS. Auto Open 1. BFP#2 VFD ON FB with 1s delays open 20% with reference of position FB. Closing Per missives (BFP#2 discharge BYPASS MOV) Manual Close 1. Close command from DCS. Auto Close 2. BFP#2 discharge MOV (1035) open FB with 3s delays, BFP-2 discharge Bypass MOV closing. Refer Interlock Logic Diagram: 1104-113-19. 17) HP HEATER-1 BYPASS MOV BYPASS (1036A) Start Permissive -------------------------------------------------------------TURBINE INTERLOCK WRITE UP 30

GREENESOL POWER SYSTEMS PVT.LIMITED PROJECT: M/S.MADHUCON-2X135MW -------------------------------------------------------------1) MOV-1036A in remote (DCS) mode. 2) MOV-1036A not in trip condition. 3) MOV-1036A Close Command not Active. 4) Stop - not active. 5) Local Push Button is in release condition. The above Conditions are satisfied 1) Open Command from DCS. 2) Close Command from DCS. Refer Interlock Logic Diagram: 1104-113-20.

18) HP HEATER-1 I/L MOV BYPASS (1037A)

1) 2) 3) 4) 5)


The above Conditions are satisfied 1) Open Command from DCS. 2) Close Command from DCS. Refer Interlock Logic Diagram: 1104-113-21. 19) HP HEATER-1 O/L MOV BYPASS (1038A)

1) 2) 3) 4) 5)


The above Conditions are satisfied 1) Open Command from DCS. 2) Close Command from DCS. Refer Interlock Logic Diagram: 1104-113-22. 20) HP HEATER-2 BYPASS MOV BYPASS (1039A) -------------------------------------------------------------TURBINE INTERLOCK WRITE UP 31


1) 2) 3) 4) 5)


The above Conditions are satisfied 1) Open Command from DCS. 2) Close Command from DCS. Refer Interlock Logic Diagram: 1104-113-23. 21) HP HEATER-2 I/L MOV BYPASS (1040A)

1) 2) 3) 4) 5)


The above Conditions are satisfied 1) Open Command from DCS. 2) Close Command from DCS. Refer Interlock Logic Diagram: 1104-113-24. 22) HP HEATER-2 O/L MOV BYPASS (1041A)

1) 2) 3) 4) 5)


The above Conditions are satisfied 1) Open Command from DCS. 2) Close Command from DCS. Refer Interlock Logic Diagram: 1104-113-25. -------------------------------------------------------------TURBINE INTERLOCK WRITE UP 32

GREENESOL POWER SYSTEMS PVT.LIMITED PROJECT: M/S.MADHUCON-2X135MW -------------------------------------------------------------23) HP SIDE MAIN STEAM MOV-LEFT (1042)

1) 2) 3) 4) 5)


The above Conditions are satisfied 1) Open Command from DCS. 2) Close Command from DCS. Refer Interlock Logic Diagram: 1104-113-26. 24) HP SIDE MAIN STEAM MOV-RIGHT (1043)

1) 2) 3) 4) 5)


The above Conditions are satisfied 1) Open Command from DCS. 2) Close Command from DCS. Refer Interlock Logic Diagram: 1104-113-27. 25) COLD REHEATER HEADER DRAIN-1 (1050B)

1) 2) 3) 4) 5)

MOV-1050B in remote (DCS) mode. MOV-1050B not in trip condition. MOV-1050B Close Command not Active. Stop - not active. Local Push Button is in release condition.

The above Conditions are satisfied 1) Open Command from DCS. 2) Close Command from DCS. Refer Interlock Logic Diagram: 1104-113-28. -------------------------------------------------------------TURBINE INTERLOCK WRITE UP 33

GREENESOL POWER SYSTEMS PVT.LIMITED PROJECT: M/S.MADHUCON-2X135MW -------------------------------------------------------------26) COLD REHEATER HEADER DRAIN-2 (1051B)

1) 2) 3) 4) 5)

MOV-1051B in remote (DCS) mode. MOV-1051B not in trip condition. MOV-1051B Close Command not Active. Stop - not active. Local Push Button is in release condition.

The above Conditions are satisfied 1) Open Command from DCS. 2) Close Command from DCS. Refer Interlock Logic Diagram: 1104-113-29. 27) LP SIDE MAIN STEAM MOV-LEFT (1046)

1) 2) 3) 4) 5)


The above Conditions are satisfied 1) Open Command from DCS. 2) Close Command from DCS. Refer Interlock Logic Diagram: 1104-113-30. 28) LP SIDE MAIN STEAM MOV-LEFT (1047)

1) 2) 3) 4) 5)


The above Conditions are satisfied 1) Open Command from DCS. 2) Close Command from DCS. -------------------------------------------------------------TURBINE INTERLOCK WRITE UP 34

GREENESOL POWER SYSTEMS PVT.LIMITED PROJECT: M/S.MADHUCON-2X135MW -------------------------------------------------------------Refer Interlock Logic Diagram: 1104-113-31. 29) BLEED -5 to LP Heater-2 (MOV-1022 INCHING TYPE) Bleed#5 MOV shall be opened or closed manually in remote mode (DCS) when the following conditions are occurred. Opening Permissive (Bleed-5 MOV)-Manual mode 1. Remote (DCS) mode selected 2. Open command from DCS. 3. No trip FB 4. No Stop FB. 5. No Close Command The above Conditions are satisfied 1) Open Command from DCS. 2) Close Command from DCS. OR 1. LP Heater-2 level high(LT-903) Refer Interlock Logic Diagram: 1104-113-32. 30) LP HEATER-1 I/L MOV (1025)

1) 2) 3) 4) 5)


The above Conditions are satisfied 1) Open Command from DCS. 2) Close Command from DCS. Refer Interlock Logic Diagram: 1104-113-33. 31) LP HEATER-1 BYPASS MOV (1026)

1) 2) 3) 4)

MOV-1026 in remote (DCS) mode. MOV-1026 not in trip condition. MOV-1026 Close Command not Active. Stop - not active.


GREENESOL POWER SYSTEMS PVT.LIMITED PROJECT: M/S.MADHUCON-2X135MW -------------------------------------------------------------5) Local Push Button is in release condition. The above Conditions are satisfied 1) Open Command from DCS. 2) Close Command from DCS. Refer Interlock Logic Diagram: 1104-113-34. 32) LP HEATER-1 O/L MOV (1027)

1) 2) 3) 4) 5)


The above Conditions are satisfied 1) Open Command from DCS. 2) Close Command from DCS. Refer Interlock Logic Diagram: 1104-113-35. 33) LP HEATER-2 I/L MOV (1028)

1) 2) 3) 4) 5)



1) MOV-1029 in remote (DCS) mode. 2) MOV-1029 not in trip condition. 3) MOV-1029 Close Command not Active. -------------------------------------------------------------TURBINE INTERLOCK WRITE UP 36

GREENESOL POWER SYSTEMS PVT.LIMITED PROJECT: M/S.MADHUCON-2X135MW -------------------------------------------------------------4) Stop - not active. 5) Local Push Button is in release condition. The above Conditions are satisfied 1) Open Command from DCS. 2) Close Command from DCS. Refer Interlock Logic Diagram: 1104-113-37. 35) LP HEATER-2 O/L MOV (1030)

1) 2) 3) 4) 5)


The above Conditions are satisfied 1) Open Command from DCS. 2) Close Command from DCS. Refer Interlock Logic Diagram: 1104-113-38. 36) LP HEATER-3 I/L MOV (1031)

1) 2) 3) 4) 5)



1) MOV-1032 in remote (DCS) mode. -------------------------------------------------------------TURBINE INTERLOCK WRITE UP 37

GREENESOL POWER SYSTEMS PVT.LIMITED PROJECT: M/S.MADHUCON-2X135MW -------------------------------------------------------------2) MOV-1032 not in trip condition. 3) MOV-1032 Close Command not Active. 4) Stop - not active. 5) Local Push Button is in release condition. The above Conditions are satisfied 1) Open Command from DCS. 2) Close Command from DCS. Refer Interlock Logic Diagram: 1104-113-40. 38) LP HEATER-1 O/L MOV (1033)

1) 2) 3) 4) 5)


The above Conditions are satisfied 1) Open Command from DCS. 2) Close Command from DCS. Refer Interlock Logic Diagram: 1104-113-41. 39) BFP -1(Discharge MOV-1034 ON & OFF TYPE)

BFP#1 discharge BY PASS MOV shall be opened or closed on manually in remote mode (DCS) when the following conditions are occurred. Opening Per missives (BFP #1 discharge MOV) 1. Remote (DCS) mode selected 2. No trip FB 3. No Stop FB. 4. No Close Command. 5. Local Push Button is in release condition. The above Conditions are satisfied 1) Open Command from DCS. 2) Close Command from DCS. -------------------------------------------------------------TURBINE INTERLOCK WRITE UP 38

GREENESOL POWER SYSTEMS PVT.LIMITED PROJECT: M/S.MADHUCON-2X135MW -------------------------------------------------------------Refer Interlock Logic Diagram: 1104-113-42. 40) BFP -2(Discharge MOV-1035 ON & OFF TYPE) BFP#2 discharge BY PASS MOV shall be opened or closed on manually in remote mode (DCS) when the following conditions are occurred. Opening Per missives (BFP#2 discharge MOV) 1. Remote (DCS) mode selected 2. No trip FB 3. No Stop FB. 4. No Close Command. 5. Local Push Button is in release condition. The above Conditions are satisfied 1) Open Command from DCS. 2) Close Command from DCS. Refer Interlock Logic Diagram: 1104-113-43. 41) HP HEATER-1 I/L MOV (1036)

1) MOV-1036 in remote (DCS) mode. 2) MOV-1036 not in trip condition. 3) MOV-1036 Close Command not Active. 4)Stop - not active. 5) Local Push Button is in release condition. The above Conditions are satisfied 1) Open Command from DCS. 2) Close Command from DCS. Refer Interlock Logic Diagram: 1104-113-44. 42) HP HEATER-1 BYPASS MOV (1037)

1) 2) 3) 4) 5)



GREENESOL POWER SYSTEMS PVT.LIMITED PROJECT: M/S.MADHUCON-2X135MW -------------------------------------------------------------The above Conditions are satisfied 1) Open Command from DCS. 2) Close Command from DCS. Refer Interlock Logic Diagram: 1104-113-45. 43) HP HEATER-1 O/L MOV (1038)

1) 2) 3) 4) 5)


The above Conditions are satisfied 1) Open Command from DCS. 2) Close Command from DCS. Refer Interlock Logic Diagram: 1104-113-46. 44) HP HEATER-2 I/L MOV (1039)

1) 2) 3) 4) 5)


The above Conditions are satisfied 1) Open Command from DCS. 2) Close Command from DCS. In release condition. 6) Stop from DCS. Refer Interlock Logic Diagram: 1104-113-47. 45) HP HEATER-2 BYPASS MOV (1040)

1) MOV-1040 in remote (DCS) mode. 2) MOV-1040 not in trip condition. -------------------------------------------------------------TURBINE INTERLOCK WRITE UP 40

GREENESOL POWER SYSTEMS PVT.LIMITED PROJECT: M/S.MADHUCON-2X135MW -------------------------------------------------------------3) MOV-1040 Close Command not Active. 4) Stop - not active. 5) Local Push Button is in release condition. The above Conditions are satisfied 1) Open Command from DCS. 2) Close Command from DCS. Refer Interlock Logic Diagram: 1104-113-48. 46) HP HEATER-2 O/L MOV (1041)

1) 2) 3) 4) 5)


The above Conditions are satisfied 1) Open Command from DCS. 2) Close Command from DCS. Refer Interlock Logic Diagram: 1104-113-49. 47) BALL RECIRCULATION SECTION-1(1052) 1) 2) 3) 4) 5)


The above Conditions are satisfied 1) Open Command from DCS. 2) Close Command from DCS. Refer Interlock Logic Diagram: 1104-113-50. 48) BALL RECIRCULATION SECTION-2(1053)


GREENESOL POWER SYSTEMS PVT.LIMITED PROJECT: M/S.MADHUCON-2X135MW -------------------------------------------------------------3) MOV-1053 Close Command not Active. 4) Stop - not active. 5) Local Push Button is in release condition. The above Conditions are satisfied 1) Open Command from DCS. 2) Close Command from DCS. Refer Interlock Logic Diagram: 1104-113-51. 49) BALL RECIRCULATION DISCHARGE-1(1054)

1) 2) 3) 4) 5)


The above Conditions are satisfied 1) Open Command from DCS. 2) Close Command from DCS. Refer Interlock Logic Diagram: 1104-113-52. 50) BALL RECIRCULATION DISCHARGE-2(1055) 1) 2) 3) 4) 5)


The above Conditions are satisfied 1) Open Command from DCS. 2) Close Command from DCS. Refer Interlock Logic Diagram: 1104-113-53. 51) VACCUM BREAKER (1011)


GREENESOL POWER SYSTEMS PVT.LIMITED PROJECT: M/S.MADHUCON-2X135MW -------------------------------------------------------------3) MOV-1011 Close Command not Active. 4) Stop - not active. 5) Local Push Button is in release condition. The above Conditions are satisfied 1) Open Command from DCS. 2) Close Command from DCS. Refer Interlock Logic Diagram: 1104-113-54. 52) CONDENSATE EXTRACTION PUMP -1(Discharge MOV-1023) CEP #1 discharge MOV shall be opened or closed on automatically or manually in remote mode (DCS) when the following conditions are occurred. Opening Per missives (CEP#1 discharge MOV)1. Remote (DCS) mode selected 2. No trip FB 3. No Stop FB. 4. No Close Command. 5. Local Push Button is in Release Condition. Manual Open 1. Open command from DCS. Auto Open 1. CEP#1 VFD ON FB with 3s delays opening. Closing Per missives (CEP#1 discharge MOV) Manual Close 1. Close command from DCS. Auto Close 7. CEP#1 VFD OFF FB with 3s delays closing. Refer Interlock Logic Diagram: 1104-113-55. 53) CONDENSATE EXTRACTION PUMP -2(Discharge MOV-1024) CEP #2 discharge MOV shall be opened or closed on automatically or manually in remote mode (DCS) when the following conditions are occurred. -------------------------------------------------------------TURBINE INTERLOCK WRITE UP 43

GREENESOL POWER SYSTEMS PVT.LIMITED PROJECT: M/S.MADHUCON-2X135MW -------------------------------------------------------------Opening Per missives (CEP#2 discharge MOV)1. Remote (DCS) mode selected 2. No trip FB 3. No Stop FB. 4. No Close Command. 5. Local Push Button is in Release Condition. Manual Open 1. Open command from DCS. Auto Open 1. CEP#2 VFD ON FB with 3s delays opening. Closing Per missives (CEP#2 discharge MOV) Manual Close 1. Close command from DCS. Auto Close 1. CEP#2 VFD OFF FB with 3s delays closing. Refer Interlock Logic Diagram: 1104-113-56.

54) MAIN OIL TANK TO DIRTY OIL TANK (1056)

1) 2) 3) 4) 5)


The above Conditions are satisfied 1) Open Command from DCS. 2) Close Command from DCS. Refer Interlock Logic Diagram: 1104-113-57. 55) AUXILIARY STEAM LINE FROM PRDS (1057) Start Permissive 1) MOV-1057 in remote (DCS) mode. 2) MOV-1057 not in trip condition. -------------------------------------------------------------TURBINE INTERLOCK WRITE UP 44

GREENESOL POWER SYSTEMS PVT.LIMITED PROJECT: M/S.MADHUCON-2X135MW -------------------------------------------------------------3) MOV-1057 Close Command not Active. 4) Stop - not active. 5) Local Push Button is in release condition. The above Conditions are satisfied 1) Open Command from DCS. 2) Close Command from DCS. Refer Interlock Logic Diagram: 1104-113-58.



SOLENIDE VALVES 1. DRAIN SOLENOIDE VALVES: (DCV-01 to DCV-08) All SOV’s are 230V AC supply, should open or close manually all SOV’s at a time. 2. Spray water to Dump SOV (SOV-941-220VDC):When ever any of the LP BY PASS Valves 1or2 is open with reference of position feedback >5%(ZT-903 or ZT-904) should open SOV941 and shall be closed after closing of LP BYPASS VALVES 1&2 with reference of feedback <1% with time delay of 10 Min. in Auto mode.

3. TURBINE EXHAUST HOOD SPRAYING SYSTEM SOV: Whenever the temperature of exhaust hood temperature increases to 80deg C with reference of TE-941 should open SOV and shall close SOV when temperature reaches 45 Deg C in auto mode. 4. DEAERATOR TO COMMON SURGE TANK SOV (LCV-909-220V DC): Whenever the level of Deaerator reaches to 90% should open SOV and shall close when level reaches to 80% with reference of LT-908, LT-909. 5. BOP (20-1) SOV-230V AC: Test block of BOP#1 Manual operation only, open and close shall be made from DCS to test the AOP Motor start with activation of PS (BOP63-1).

6. BOP (20-2) SOV-230V AC: Test block of BOP#2 Manual operations only, open and close shall be made from DCS to test the AOP motor start with activation of PS (BOP63-2). 7. EOP (20-1) SOV-230V AC: Test block of EOP#1 Manual operation only, open and close shall be done from DCS to test the EOP Motor start with activation of PS (EOP63-1).

8. EOP (20-2) SOV-230V AC: Test block of EOP#2 Manual operation only, open and close shall be made from DCS to test the EOP Motor start with activation of PS (EOP63-2).



Closed Loops: 1) PRDS Temperature control steam to Gland Sealing (TCV905): This control loop is used to control the PRDS temperature. The temperature element (TE-916) senses the PRDS line temperature. The output temperature signal from temperature element is fed to a temperature indicating controller (TIC-916) as a process variable. The process variable signal is compared with the operator feed manual set point in the temperature indicating controller. The output of the temperature controller operates the temperature control valve (TCV905) on the PRDS line to control the PRDS temperature. Refer closed loop logic diagram: 1104-02-2820-2 2) PRDS PRESSURE CONTROL STEAM TO GLAND SEALING (PCV901): This control loop is used to control the PRDS pressure. The pressure transmitter (PT-916) senses the PRDS line pressure. The output pressure signal is fed to a pressure indicating controller (PIC916) as a process variable. The process variable signal is compared with the fixed set point in the pressure indicating controller. The output of the pressure controller operates the PRDS pressure control valve (PCV-901) on the PRDS line to control the PRDS pressure. Refer closed loop logic diagram: 1104-02-2820-3 3) PRDS TEMPERATURE CONTROL STEAM TO PEGGING STEAM (TCV-906): This control loop is used to control the PRDS temperature. The temperature element (TE-917) senses the PRDS line temperature. The output temperature signal from temperature element is fed to a temperature indicating controller (TIC-917) as a process variable. The process variable signal is compared with the operator feed manual set point in the temperature indicating controller. The output of the temperature controller operates the temperature control valve (TCV-906) on the PRDS line to control the PRDS temperature. Refer closed loop logic diagram: 1104-02-2820-4 4) PRDS PRESSURE CONTROL STEAM TO PEGGING STEAM (PCV902): This control loop is used to control the PRDS pressure. The pressure transmitter (PT-917) senses the PRDS line pressure. The output pressure signal is fed to a pressure indicating controller (PIC917) as a process variable. The process variable signal is compared with the fixed set point in the pressure indicating controller. The output of the pressure controller operates the PRDS pressure control valve (PCV-902) on the PRDS line to control the PRDS pressure. -------------------------------------------------------------TURBINE INTERLOCK WRITE UP 47

GREENESOL POWER SYSTEMS PVT.LIMITED PROJECT: M/S.MADHUCON-2X135MW -------------------------------------------------------------Refer closed loop logic diagram:p 1104-02-2820-5 5) GLAND SEALING DRAIN TO LP HEATER-1 (FCV 000): This control loop is used to control GLAND SEALING STAM. The pressure transmitter (PT-919) senses GLAND SEALING STEAM PRESSURE is given as process variable to level controller. The process variable signal is compared with the operator feed manual set point in the controller. When the GLAND SEALING STEAM PRESSURE comes above the set point, controller will open FCV-000 to maintain the pressure. Refer closed loop logic diagram: 1104-02-2820-6 6) PRDS TEMPERATURE CONTROL STEAM TO AUXILIARY STEAM HEADER (TCV-907): This control loop is used to control the PRDS temperature. The temperature element (TE-59) senses the PRDS line temperature. The output temperature signal from temperature element is fed to a temperature indicating controller (TIC-59) as a process variable. The process variable signal is compared with the operator feed manual set point in the temperature indicating controller. The output of the temperature controller operates the temperature control valve (TCV-907) on the PRDS line to control the PRDS temperature. Refer closed loop logic diagram: 1104-02-2820-7 7) PRDS PRESSURE CONTROL STEAM TO AUXILIARY STEAM HEADER (PCV-903): This control loop is used to control the PRDS pressure. The pressure transmitter (PT-60) senses the PRDS line pressure. The output pressure signal is fed to a pressure indicating controller (PIC-60) as a process variable. The process variable signal is compared with the fixed set point in the pressure indicating controller. The output of the pressure controller operates the PRDS pressure control valve (PCV-903) on the PRDS line to control the PRDS pressure. Refer closed loop logic diagram: 1104-02-2820-8 8) MINIMUM RECIRCULATION TO CONDENSER (FCV-941): This control loop is used to control minimum recirculation to condenser. The flow transmitter (FT-942) senses the line flow from GLAND STEAM VENT CONDESER. The output of flow signal is fed to a flow indicating controller (FIC-941) as a process variable. The process variable signal is compared with the fixed set point in the flow indicating controller. The output of the flow controller operates the flow control valve (FCV941) on the minimum recirculation line. Refer closed loop logic diagram: 1104-02-2820-9 -------------------------------------------------------------TURBINE INTERLOCK WRITE UP 48

GREENESOL POWER SYSTEMS PVT.LIMITED PROJECT: M/S.MADHUCON-2X135MW -------------------------------------------------------------9) Hot Well LEVEL CONTROL (LCV-907): This control loop is used to control the LP HEATER level. The level transmitter (LT-907A, LT907B and LT-907C senses the hot well tank level. These signals from three level transmitters are given to a 2 out of 3 logic block. This block output is given to process variable to level controller LIC907.The process variable signal is compared with the operator feed manual set point in the controller. When the hot well level comes above the set point, controller will open LCV-907 to maintain the level. Refer closed loop logic diagram: 1104-02-2820-10 10) CONDENSATE FROM EXPORT CONTROL VALVE TO COMMON SURGE TANK (LCV-908): This control loop is used to control the Common surge tank level. Two numbers of level transmitters (LT-908 & LT-909) senses the Deaerator tank level. The signals from two level transmitters are given to a 1 out of 2 logic block. The 1 out of 2 output is given as process variable to level controller. The process variable signal is compared with the operator feed manual set point in the controller. When the surge tank level comes below the set point, controller will open LCV-908 to maintain the level. Refer closed loop logic diagram: 1104-02-2820-11 11) COMMON SURGE TANK TO HOT WELL (LCV-907A): This control loop is used to control the hot well level. The level transmitter (LT-907A, LT-907B, and LT-907C (2 OUT OF 3 LOGIC)) senses the hot well level is given as process variable to level controller. The process variable signal is compared with the operator feed manual set point in the controller. When the surge tank level comes above the set point, controller will open LCV-907A to maintain the level. Refer closed loop logic diagram: 1104-02-2820-12 12) CONDENSATE TO LP HEATER-2 (LCV-904): This control loop is used to control the level in LP HEATER-2. The level transmitter (LT903) senses the LP HEATER-2 level is given as process variable to level controller. The process variable signal is compared with the operator feed manual set point in the controller. When the LP HEATER-2 level comes above the set point, controller will open LCV-904 to maintain the level. Refer closed loop logic diagram: 1104-02-2820-13 13) LP HEATER-1 LEVEL CONTROL (LCV-904A): This control loop is used to control the LP HEATER-1 level. The level transmitter (LT904) senses the LP HEATER-1 level is given as process variable to level controller. The process variable signal is compared with the operator -------------------------------------------------------------TURBINE INTERLOCK WRITE UP 49

GREENESOL POWER SYSTEMS PVT.LIMITED PROJECT: M/S.MADHUCON-2X135MW -------------------------------------------------------------feed manual set point in the controller. When the LP HEATER-1 level comes above the set point, controller will open LCV-904A to maintain the level. Refer closed loop logic diagram: 1104-02-2820-14 14) LP HEATER-3 DRAIN TO LP HEATER-2 CONTROL (LCV-902): This control loop is used to control the LP HEATER-3 level. The level transmitter (LT-902) senses the LP HEATER-3 level is given as process variable to level controller. The process variable signal is compared with the operator feed manual set point in the controller. When the LP HEATER-3 level comes above the set point, controller will open LCV902 to maintain the level. Refer closed loop logic diagram: 1104-02-2820-15 15) LP HEATER-3 TO HOT WELL CONTROL (LCV-902A): This control loop is used to control the LP HEATER-3 level. The level transmitter (LT-902) senses the LP HEATER-3 level is given as process variable to level controller. The process variable signal is compared with the operator feed manual set point in the controller. When the LP HEATER-3 level comes above the set point, controller will open LCV902A to maintain the level. Refer closed loop logic diagram: 1104-02-2820-16 16) LP HEATER-2 DRAIN TO LP HEATER-1 CONTROL (LCV-903): This control loop is used to control the LP HEATER-2 level. The level transmitter (LT-903) senses the LP HEATER-2 level is given as process variable to level controller. The process variable signal is compared with the operator feed manual set point in the controller. When the LP HEATER-2 level comes above the set point, controller will open LCV903 to maintain the level. Refer closed loop logic diagram: 1104-02-2820-17 17) LP HEATER-2 TO LP HOT WELL CONTROL (LCV-903A): This control loop is used to control the LP HEATER-2 level. The level transmitter (LT-903) senses the LP HEATER-2 level is given as process variable to level controller. The process variable signal is compared with the operator feed manual set point in the controller. When the LP HEATER-2 level comes above the set point, controller will open LCV903A to maintain the level. Refer closed loop logic diagram: 1104-02-2820-18 18) HP HEATER-2 DRAIN TO LP HP HEATER-1 CONTROL (LCV905A): This control loop is used to control the HP HEATER-2 level. The level transmitter (LT-905) senses the HP HEATER-2 level is given as -------------------------------------------------------------TURBINE INTERLOCK WRITE UP 50

GREENESOL POWER SYSTEMS PVT.LIMITED PROJECT: M/S.MADHUCON-2X135MW -------------------------------------------------------------process variable to level controller. The process variable signal is compared with the operator feed manual set point in the controller. When the HP HEATER-2 level comes above the set point, controller will open LCV-905A to maintain the level. Refer closed loop logic diagram: 1104-02-2820-19 19) HP HEATER-2 TO LP HP FLASH TANK CONTROL (LCV-905B): This control loop is used to control the HP HEATER-2 level. The level transmitter (LT-905) senses the HP HEATER-2 level is given as process variable to level controller. The process variable signal is compared with the operator feed manual set point in the controller. When the HP HEATER-2 level comes above the set point, controller will open LCV905B to maintain the level. Refer closed loop logic diagram: 1104-02-2820-20 20) HP HEATER-1 DRAIN TO DEAERATOR CONTROL (LCV-906): This control loop is used to control the HP HEATER-1 level. The level transmitter (LT-906) senses the HP HEATER-1 level is given as process variable to level controller. The process variable signal is compared with the operator feed manual set point in the controller. When the HP HEATER-1 level comes above the set point, controller will open LCV906 to maintain the level. Refer closed loop logic diagram: 1104-02-2820-21 21) HP HEATER-1 DRAIN TO HP FLASH TANK CONTROL (LCV906A): This control loop is used to control the HP HEATER-1 level. The level transmitter (LT-906) senses the HP HEATER-1 level is given as process variable to level controller. The process variable signal is compared with the operator feed manual set point in the controller. When the HP HEATER-1 level comes above the set point, controller will open LCV-906A to maintain the level. Refer closed loop logic diagram: 1104-02-2820-22 22) LUBE OIL OVER PRESSURE CONTROL (PRV-910): This control loop is used to control LUBE OIL OVER PRESSURE. This pressure transmitter (PT-128) Senses LUBE OIL HEADER PRESSURE and consider as a process variable to pressure controller. The process variable signal is compared with the operated feed manual set point in the controller. When the LUBE OIL HEADER PRESSURE comes above the set point, controller will open PRV-910 to maintain the pressure. Refer Closed Loop Logic Diagram: 1104-02-2820-23


GREENESOL POWER SYSTEMS PVT.LIMITED PROJECT: M/S.MADHUCON-2X135MW -------------------------------------------------------------Turbine Trips from DCS to ETS: All turbine trips are derived in ETS logics some important trips related to process derived in DCS and turbine trip command shall issued to ETS PLC to trip turbine, the conditions are: 1. 2. 3. 4.

LP HEATER-1 LEVEL HI HI(LT-904)-95% METAL TEMPERATURE OF BEARING-1(TE-114A)-100DEG. METAL TEMPERATURE OF BEARING-1(TE-114B)-100DEG. WORKING PAD TEMPERATURE OF TRUST BEARING (TE100)-100DEG. 5. WORKING PAD TEMPERATURE OF TRUST BEARING (TE101)-100DEG. 6. WORKING PAD TEMPERATURE OF TRUST BEARING (TE102)-100DEG. 7. WORKING PAD TEMPERATURE OF TRUST BEARING (TE103)-100DEG. 8. WORKING PAD TEMPERATURE OF TRUST BEARING (TE104)-100DEG. 9. WORKING PAD TEMPERATURE OF TRUST BEARING (TE105)-100DEG. 10. WORKING PAD TEMPERATURE OF TRUST BEARING (TE106)-100DEG. 11. WORKING PAD TEMPERATURE OF TRUST BEARING (TE107)-100DEG. 12. WORKING PAD TEMPERATURE OF TRUST BEARING (TE108)-100DEG. 13. WORKING PAD TEMPERATURE OF TRUST BEARING (TE109)-100DEG. 14. RETURN OIL TEMPERATURE OF LOCATING PAD (TE-110)100DEG. 15. METAL TEMPERATURE OF BEARING-2(TE-115)-100DEG. 16. WORKING PAD TEMPERATURE OF TRUST BEARING (TE112)-100DEG. 17. WORKING PAD TEMPERATURE OF TRUST BEARING (TE113)-100DEG. 18. METAL TEMPERATURE OF BEARING-3(TE-116A)-100DEG. 19. METAL TEMPERATURE OF BEARING-3(TE-116B)-100DEG. 20. EGERGENCY PUSH BUTTON 1&2 OPERATED FROM CONSOLE. 21. TURBINE INLET TEMPERATURE HIGH. 22. TURBINE INLET PRESSURE HIGH.



TURBINE ALARMS (SOE) in DCS: 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. 27. 28. 29. 30. 31.

EH OIL PRESSURE LOW. LUBE OIL PRESSURE LOW. VACUUM LOW. TRUST POSITION TRIP. TSI OVER SPEED. BEARING VIBRATION TRIP. SHAFT VIBRATION TRIP. GENERATOR FAULT TRIP. HP EXHAUST STEAM TEMPERATURE HIGH. MANAUL TRIP. ON LINE TEST. DEH POWER LOST. DIFFRENTIAL EXPANSION TRIP. MFT TRIP. ASP-1. ASP-2 OPC DISABLE. DEH OVER SPEED. ETS TURBINE TRIPPED-1. ETS TURBINE TRIPPED-2. ETS TURBINE TRIPPED-3. ETS TURBINE TRIPPED-4. ETS TURBINE TRIPPED-5. ETS TURBINE TRIPPED-6. ETS TURBINE TRIPPED-7. ETS TURBINE TRIPPED-8. 220 VDC-A ALARM FROM ETS. 220 VAC-A ALARM FROM ETS. 220 VAC-B ALARM FROM ETS. 24V DC-A ALARM FROM ETS. 24V DC-B ALARM FROM ETS.



OPEN LOOPS: 1. QCNRV TO COLD RE HEATER TO HEADER: This QCNRV shall be open or close manually from DCS. 2. QCNRV TO HP HEATER-2: This QCNRV shall be open or close manually from DCS. 3. QCNRV TO HP HEATER-1: This QCNRV shall be open or close manually from DCS. 4. QCNRV TO HP HEATER-2: This QCNRV shall be open or close manually from DCS. 5. QCNRV TO DEAERATOR: This QCNRV shall be open or close manually from DCS. 6. QCNRV TO LP HEATER-3: This QCNRV shall be open or close manually from DCS. 7. QCNRV TO LP HEATER-2: This QCNRV shall be open or close manually from DCS.



8) PERFORMANCE CALCULATION Turbine Heat Rate =Q1 (h1-h2) + Q2 (h3-h4) P Q1= Main Steam Inlet Flow-TPH Q2= Reheat Steam Inlet Flow-TPH h1= Enthalpy of Main Steam Inlet –kj/kg h2= Enthalpy of Feed Water at Inlet of Economizer-kj/kg h3= Enthalpy of Hot Reheat Inlet-kj/kg h4= Enthalpy of Cold Reheat Steam-kj/kg P = Output Power of Generator-KW Turbine heat rate-in kj/kw hr For Q1=Flow of Main Steam Flow Nozzle (FE 902 + FE 904) Q2=Flow of Hot Reheat Steam Flow Nozzle (FE 906 + FE 908) h1=Main Steam Enthalpy Considering Temperature & Pressure (PT-921, PT-922 & TE-901A, TE-902A) h2=Feed Water Enthalpy Considering Pressure & Temperature (PT-973 & TE-973) h3=Hot Reheat Steam Enthalpy Considering Pressure & Temperature (PT-905, PT-906 & TE-907, TE-908) h4=Cold Reheat Steam Enthalpy Considering Pressure & Temperature (PT-905, PT-906 & TE-905, TE-906) Specific Steam Consumption = Main Steam Flow / MW.



EMERGENCY TRIP SYSTEM (ETS) and Automatic Turbine tester: Turbine tripping has been derived in ETS panel through independent two PLC’s all critical signals are connected to each PLC in ETS panel to trip Turbine immediately when any abnormal conditions are happened and further it has been derived for any fault to display in DCS as SOE inputs and as well as annunciation which provide in ETS panel. 1.There are three levels of voltages are provided for channel-1 and channel-2,230V AC,220V DC and 24V DC the healthiness of these voltages will be monitored on ETS panel. 2. The following signals are connected to ETS panel and then it has been connected to each PLC from field. 1. EH OIL PRESSURE LOW 63/LP-1 2. EH OIL PRESSURE LOW 63/LP-3

3. LUBE PRESSURE LOW 63/LBO-1 4. LUBE PRESSURE LOW 63/LBO-3 5. VACUUM LOW 63/LV1 6. VACUUM LOW 63/LV3

7. GENERATOR FAULT TRIP1、2（TWO CHANNELS）

8. HP EXHAUST STEAM TEMPERATURE HIGH 1、2（TWO CHANNELS） 9. ASP-1

10. EH OIL PRESSURE LOW 63/LP-2 11. EH OIL PRESSURE LOW 63/LP-4 12. LUBE PRESSURE LOW 63/-2 13. LUBE PRESSURE LOW 63/-4 14. VACUUM LOW 63/LV2 15. VACUUM LOW 63/LV4

16. ASP-2 THE FOLLOWING SIGNALS WERE DERIVED FROM TSI PANEL. 1. THRUST POSITION TRIP1、2（TWO CHANNELS） 2. TSI OVERSPEED TRIP1、2（TWO CHANNELS）


GREENESOL POWER SYSTEMS PVT.LIMITED PROJECT: M/S.MADHUCON-2X135MW -------------------------------------------------------------3. BEARING VIBRATION TRIP1、2（TWO CHANNELS） 4. SHAFT VIBRATION TRIP1、2（TWO CHANNELS）

5. DIFFERENTIAL EXPENSION TRIP 1、2（TWO CHANNELS）

THE FOLLOWING SIGNALS WERE DERIVED FROM DEH PANEL.

1. DEH POWER SUPPLY LOST TRIP 1、2（TWO CHANNELS） 2. DEH OVERSPEED TRIP 1、2（TWO CHANNELS）

THE FOLLOWING SIGNALS WERE DERIVED FROM MANUAL PANEL MOUNTED IN ETS PANEL. 1. AST1 2. AST2 3. AST3 4. AST4

5. MANUAL TRIP

THE FOLLOWING SIGNALS ARE DERIVED FROM DCS 1. MANUAL TRIP

NOTE: NOTE RESET OF TRIPPINGS CAN BE DONE FROM MANUAL PANEL OR FROM DCS.

FOLLOWING ARE THE ON LINE TEST WHICH CAN BE PREFORMED FROM ETS PANEL

1. ON LINE TEST-TO TEST THE OPERATION OF SOLENOIDE VALVES IN ON LINE.

2. LAMP TEST-TO TEST LAMPS GLOWING ON ETS PANEL.

AUTOMATIC TURBINE TESTER TESTER: STER:

1. LPTLPT-1(CH(CH-1)OR LPTLPT-2(CH 2(CH-2)2)-EH OIL TEST:-TEST BLOCK OF EH OIL PRESSURE:DURING NORMAL RUNNING CONDITION ANY

MAIN OIL PUMP(HP1 OR HP2)WILL BE IN RUNNING CONDITION

AND IF THE DISCHARGE PRESSURE IS LOW TURBINE WILL TRIP WITH REFRENCE OF PRESSURE SWITCHS(LP63-1&LP63-3

CONNECTED TO PLC1 AND LP63-2&LP63-4 CONNECTED TO PLC-------------------------------------------------------------TURBINE INTERLOCK WRITE UP 57

GREENESOL POWER SYSTEMS PVT.LIMITED PROJECT: M/S.MADHUCON-2X135MW -------------------------------------------------------------2)AND THIS FUNTION CAN BE TESTED DURING ON LINE AT ANY TIME BY SELECTING TO ON LINE TEST POSITION IN MANAL

PANEL AND THEN PRESS TO CH1 LP TEST OR CH2 LP TEST FROM MANUAL PANEL, BY DEPRESSING OF CH1 LP

TEST,SOV(LPT20-1)WILL ACTUATE AND WILL GIVE ALARM OF PRESSURE SWITHCES LP 63-1 AND LP 63-3 INDICATION IN ANNOUNCIATION PANEL AND IN DCS ALSO AND BY

DEPRESSING OF CH2 LP TEST,SOV(LPT20-2)WILL ACTUATE AND WILL GIVE ALARM OF PRESSURE SWITHCES LP 63-2 AND LP 634 INDICATION IN ANNOUNCIATION PANEL AND IN DCS ALSO

2. LBOTLBOT-1(CH(CH-1) OR LBOTLBOT-2(CH2(CH-2)2)-TEST BLOCK OF BEARING BEARING

OIL PRESSURE: DURING NORMAL RUNNING CONDITION ANY AOP (DURING START UP) AND MOP(DURING TURBINE

RUNNING)WILL BE IN RUNNING CONDITION AND IF THE

DISCHARGE PRESSURE IS LOW TURBINE WILL TRIP WITH REFRENCE OF PRESSURE SWITCHS(LBO63-1&LBO63-3

CONNECTED TO PLC1 AND LBO63-2&LBO63-4 CONNECTED TO

PLC-2)AND THIS FUNTION CAN BE TESTED DURING ON LINE AT

ANY TIME BY SELECTING TO ON LINE TEST POSITION IN MANAL PANEL AND THEN PRESS TO CH1 LBO TEST OR CH2 LBO TEST FROM MANUAL PANEL, BY DEPRESSING OF CH1 LBO

TEST,SOV(LBOT20-1)WILL ACTUATE AND WILL GIVE ALARM OF PRESSURE SWITHCES LBO 63-1 AND LBO 63-3 INDICATION IN ANNOUNCIATION PANEL AND IN DCS ALSO AND BY

DEPRESSING OF CH2 LBO TEST,SOV(LBOT20-2)WILL ACTUATE

AND WILL GIVE ALARM OF PRESSURE SWITHCES LBO 63-2 AND LBO 63-4 INDICATION IN ANNOUNCIATION PANEL AND IN DCS ALSO


GREENESOL POWER SYSTEMS PVT.LIMITED PROJECT: M/S.MADHUCON-2X135MW -------------------------------------------------------------3. LVTLVT-1(CH(CH-1)OR LVTLVT-2(CH2(CH-2)2)-CONDENSER VACUUME TEST: TEST: DURING NORMAL RUNNING CONDITION VACCUME WILL BE

NORMAL CONDITION AND IF THE VACUUME IS LOW TURBINE WILL TRIP WITH REFRENCE OF PRESSURE SWITCHS(LV631&LV63-3 CONNECTED TO PLC1 AND LV63-2&LV63-4

CONNECTED TO PLC-2)AND THIS FUNTION CAN BE TESTED

DURING ON LINE AT ANY TIME BY SELECTING TO ON LINE TEST

POSITION IN MANAL PANEL AND THEN PRESS TO CH1 LBO TEST OR CH2 LBO TEST FROM MANUAL PANEL, BY DEPRESSING OF CH1 LV TEST,SOV(LVT20-1)WILL ACTUATE AND WILL GIVE ALARM OF PRESSURE SWITHCES LV 63-1 AND LV 63-3

INDICATION IN ANNOUNCIATION PANEL AND IN DCS ALSO AND BY DEPRESSING OF CH2 LV TEST,SOV(LVT20-2)WILL ACTUATE AND WILL GIVE ALARM OF PRESSURE SWITHCES LV 63-2 AND LV 63-4 INDICATION IN ANNOUNCIATION PANEL AND IN DCS ALSO.

4. 20/AST20/AST-1 TRIP SOLENOID VAVLE VAVLE AND 20/AST20/AST-3 TRIP

SOLENOID VAVLE: VAVLE:THESE TWO SOV’S ARE DERIVED FROM CH-

1 OF PLC IF ANY ABNORMAL IN THE SYSTEM TURBINE WILL

THROUGH THESE SOV’S AND SAME CAN BE TESTED DURING

ON LINE AND RESPECTIVE PRESSURE SWITHCHES(AST1&AST3) WILL GENERATE ALARMS IN ANNOCIATION PANEL AND IN DCS ALSO.

5. 20/AST20/AST-2 TRIP SOLENOID VAVLE AND 20/AST20/AST-4 TRIP

SOLENOID VAVLE: VAVLE:THESE TWO SOV’S ARE DERIVED FROM CH2 OF PLC IF ANY ABNORMAL IN THE SYSTEM TURBINE WILL

THROUGH THESE SOV’S AND SAME CAN BE TESTED DURING

ON LINE AND RESPECTIVE PRESSURE SWITHCHES(AST2&AST4) -------------------------------------------------------------TURBINE INTERLOCK WRITE UP 59

GREENESOL POWER SYSTEMS PVT.LIMITED PROJECT: M/S.MADHUCON-2X135MW -------------------------------------------------------------WILL GENERATE ALARMS IN ANNOCIATION PANEL AND IN DCS ALSO.

6. ALARMS: ALARMS:

THE FOLLOWING ALARMS ARE PROVIDED ON ETS MANUAL PANEL.

1. EH OIL PRESSURE LOW 63/LP-1 2. EH OIL PRESSURE LOW 63/LP-3

3. LUBE PRESSURE LOW 63/LBO-1 4. LUBE PRESSURE LOW 63/LBO-3 5. VACUUM LOW 63/LV1 6. VACUUM LOW 63/LV3

7. THRUST POSITION TRIP 8. TSI OVERSPEED TRIP

9. BEARING VIBRATION TRIP 10. SHAFT VIBRATION TRIP

11. GENERATOR FAULT TRIP

12. HP EXHAUST STEAM TEMPERATURE HIGH 13. ASP1

14. MANUAL TRIP 15. ETS TRIPPED

16. EH OIL PRESSURE LOW 63/LP-2 17. EH OIL PRESSURE LOW 63/LP-4

18. LUBE PRESSURE LOW 63/LBO-2 19. LUBE PRESSURE LOW 63/LBO-4 20. VACUUM LOW 63/LV2

21. VACUUM LOW 63/LV4 22. DEH POWER LOST 23. DEH OVERSPEED

24. DIFFERENTIAL EXPENSION TRIP 25. MFT


GREENESOL POWER SYSTEMS PVT.LIMITED PROJECT: M/S.MADHUCON-2X135MW -------------------------------------------------------------26. LOW RATIO

27. BEARING TEMPERATURE HIGH TRIP 28. ASP2

29. OPC DISABLE 30. ONLINE TEST

THE FOLLOWING SIGNALS ARE DERIVED FROM ETS TO DCS 1. EH OIL PRESSURE LOW 2. LUBE PRESSURE LOW 3. VACUUM LOW

4. THRUST POSITION TRIP 5. TSI OVERSPEED

6. BEARING VIBRATION TRIP 7. SHAFT VIBRATION TRIP

8. GENERATOR FAULT TRIP

9. HP EXHAUST STEAM TEMPERATURE HIGH 10. ASP1

11. MANUAL TRIP 12. ONLINE TEST

13. DEH POWER LOST 14. DEH OVERSPEED

15. DIFFERENTIAL EXPENSION TRIP 16. MFT

17. LOW RATIO 18. ASP2

19. OPC DISABLE

20. TURBINE TRIPPED-1 21. TURBINE TRIPPED-2 22. TURBINE TRIPPED-3 23. TURBINE TRIPPED-4 24. TURBINE TRIPPED-5 -------------------------------------------------------------TURBINE INTERLOCK WRITE UP 61

GREENESOL POWER SYSTEMS PVT.LIMITED PROJECT: M/S.MADHUCON-2X135MW -------------------------------------------------------------25. TURBINE TRIPPED-6 26. TURBINE TRIPPED-7 27. TURBINE TRIPPED-8 28. 220VDC ALARM A 29. 220VAC ALARM A 30. 24VDC ALARM A

31. 220VDC ALARM B 32. 220VAC ALARM B 33. 24VDC ALARM B


TURBINE Logics and Interlocks

Recommend Documents