Gas Turbine Startup Per Missives for ge bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb

GAS TURBINE STARTUP PERMISSIVES Startup Check 0 1. Not compressor inlet temperature Disagree. L86TCI = 0 2. Not Inlet Guide vane position Trouble. L31GVFLT = 0 3. MCC Bus Voltage Normal. L27MC1N = 1 4. Customer Start permissive. L3CP = 1 Startup Check 1 1. Zero speed. L14HR = 0 2. Lube oil tank temperature – Normal. L26QN = 1 3. Control Mode = Not OFF. L43O = 0 4. Not hydraulic protective Trouble. L86 = 0 5. Generator breaker open. L52GX = 1 6. Not lube oil tank level Low. L71QL = 0 Startup Check 2 1. Not compressors bleed valve position trouble. L86CB1 = 0 2. Fuel gas supply condition Normal. L74FGN = 1 Startup Check 3 1. Not Master Protective Turbine Trip. L4T = 0 2. Not Loss of compressor discharge pressure BIAS. L3TFLT = 0 3. Not vibration Start inhabit. L39VD3 = 0 4. Not control system minor trouble. L30TCPSCK = 1 Startup Check 4 1. Emergency lube oil pump not running. L72QEX = 0 2. Main lube oil pump Running. L52QM1 or L52QM2 = 1 3. Not hazard gas detector alarm. L45GAX_ALM = 0 4. CO2 damper closed. L33CO2_ALM = 0 Startup check 5 1. Cranking motor available. L74CR = 1 2. Turning gear motor available. L74TG = 1 3. Emergency lube oil pump motor available. L74QE = 1 Startup Check 6 1. Main lube oil pump motor available. L74QM = 1 2. Lube oil separator Fan motor available. L74QV = 1 3. Lube oil immersion heater available. L74QT = 1 4. Turbine compartment vent fan motor available. L74BT = 1 5. No. 1 bearing Cooling fan Motor available. L74BN = 1 6. Main hydraulic oil pump Motor available. L74HQ = 1 Startup check7 1. Generator space heater available. L74HG = 1 2. Generator jacking oil pump motor available. L74JOP = 1 1 of 5

TRIP SECURITES OF GAS TURBINE 1. Main over speed trip. L12H 2. Backup over speed trip. L12_P 3. High vibration trip. L39VTX 4. Exhaust over temperature trip. L86TXT 5. Loss of flame trip. L28FDT 6. High Exhaust temperature spread trip. L30SPT 7. Inlet guide vane control trouble trip. L4IGVT 8. Compressor bleed valve position trip. L86CBT 9. Low lube oil pressure trip. L63QTX 10. Lube oil header oil temperature high trip. L26QT 11. Starting device trip. L3SMT 12. GCV Not following Trip. L86GCVT 13. SRV control trouble trip. L86SRVT 14. Hydraulic Trip pressure-low. L63HGLT 15. Hydraulic supply pressure low trip. L63HQLT 16. Startup fuel flow excessive trip. L2SFT 17. Fire indication trip. L45TX 18. Speed sensor trouble trip. L86NH 19. Exhaust thermocouple open trip. L86TFB 20. TCP Major Trouble Trip. L86TCP 21. Emergency trip P.B ON. L5EX 22. Customer Trip. L4CT 23. Generator lockout relay. L86G 24. Generator protective Relay Inoperative. L74DGP

Pre ignition trip Auxiliary check (Servos), L3ACS Emergency lube oil pump under voltage. L27QEL

EASY TO LEARN OF TRIP SECURITIES Generator trip securities 1. High Vibration Trip. 2. 24 (Over Excitation) 3. 32. Reverse power (1.8 MW reverse power for 05 seconds) only 52G and 52T opens. 4. 40 (Loss of excitation) 5. 46. negative phase sequence (6240 amperes for 05 seconds) 6. 51V. generator voltage restraint phase over current.(0V, 4000 A, 4.05 seconds) 7. 51GN (Stator earth fault backup or Generator neutral ground. (300A for 04 Seconds) 8. 59. Over voltage (7.3 Volts for 50 seconds) 9. 74 DGP. Generator protective relay in operative.(G60 2/2 failure) 10. 81O (Over frequency) 52 11. 81U (Under Frequency) 48 12. 86G (Generator Lockout) 13. 86E (Excitation system Major trouble) 14. 87G. stator differential. (120A) 15. 87GG (Differential earth fault) 2 of 5

Turbine Auxiliaries compartment trip securities 1. Starting device trip. L3SMT 2. Hydraulic Trip pressure-low. L63HGLT 3. Hydraulic supply pressure low trip. L63HQLT 4. Manual hydraulic oil drain valve trip 5. Low lube oil pressure trip. L63QTX 6. Lube oil header oil temperature high trip. L26QT 7. Speed sensor trouble trip. L86NH 8. Main over speed trip. L12H 9. Backup over speed trip. L12_P 10. High vibration trip. L39VTX 11. Fire indication trip. L45TX

Compressor Trip securities 1. Inlet guide vane control trouble trip. L4IGVT 2. Compressor bleed valve position trip. L86CBT

Turbine Trip Securities 1. 2. 3. 4.

Exhaust over temperature trip. L86TXT Loss of flame trip. L28FDT High Exhaust temperature spread trip. L30SPT Exhaust thermocouple open trip. L86TFB

Gas Assembly Trip Securities 1. GCV Not following Trip. L86GCVT 2. SRV control trouble trip. L86SRVT 3. Startup fuel flow excessive trip. L2SFT

Control compartment Trip Securities 1. TCP Major Trouble Trip. L86TCP 2. Emergency trip P.B ON. L5EX 3. Customer Trip. L4CT

Pre ignition trip 1. Auxiliary check (Servos). L3ACS 2. Emergency lube oil pump under voltage. L27QEL

EASY TO LEARN OF START PERMISSIVE 1. Generator permissive 1. 2. 3. 4.

MCC Bus Voltage Normal. L27MC1N = 1 Generator breaker open. L52GX = 1 Generator space heater available. L74HG = 1 Generator jacking oil pump motor available. L74JOP = 1

2. Lube oil system 1. 2. 3. 4. 5.

Lube oil separator Fan motor available. L74QV = 1 Not lube oil tank level Low. L71QL = 0 Lube oil immersion heater available. L74QT = 1 Lube oil tank temperature – Normal. L26QN = 1 Cranking motor available. L74CR = 1

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6. Turning gear motor available. L74TG = 1 7. Main hydraulic oil pump Motor available. L74HQ = 1 8. Not hydraulic protective Trouble. L86 = 0 9. Emergency lube oil pump motor available. L74QE = 1 10. Emergency lube oil pump not running. L72QEX = 0 11. Main lube oil pump motor available. L74QM = 1 12. Main lube oil pump Running. L52QM1 or L52QM2 = 1 13. No. 1 bearing Cooling fan Motor available. L74BN = 1

3. Compressor 1. 2. 3. 4.

Not compressor inlet temperature Disagree. L86TCI = 0 Not Inlet Guide vane position Trouble. L31GVFLT = 0 Not compressors bleed valve position trouble. L86CB1 = 0 Not Loss of compressor discharge pressure BIAS. L3TFLT = 0

4. Turbine 1. Turbine compartment vent fan motor available. L74BT = 1 2. Not vibration Start inhabit. L39VD3 = 0 3. CO2 damper closed. L33CO2_ALM = 0

5. Gas System 1. Fuel gas supply condition Normal. L74FGN = 1 2. Not hazard gas detector alarm. L45GAX_ALM = 0

6. Control 1. 2. 3. 4. 5.

Control Mode = Not OFF. L43O = 0 Zero speed. L14HR = 0 Customer Start permissive. L3CP = 1 Not Master Protective Turbine Trip. L4T = 0 Not control system minor trouble. L30TCPSCK = 1

Startup of Gas turbine 1. Reset diagnostic and Master relay individually from startup window. 2. Confirm ready to start indication appears on at start check window of HMI. All signals showing green. Than 3. All trip monitor signals are green on trip monitor window. 4. Come on start up window of HMI 5. Select local or remote from operation location face plate of startup window. 6. Select mode (crank, fire, auto as you desire) from mode select face plate of startup window. 7. Give start signal from master control face plate of startup window. 8. Following sequence will occur. Note. 88QM-1/2 will be running normally before start signal. And 88QE-1 will be OFF. 88TG will be running if cool down is selected or running.

Sequence is as after start signal 1. 2. 3. 4.

88QV, 88TG, 88BT and 88JOP-1 will start. Master control start permissive satisfied. 88HQ-1/2 Hydraulic oil pump will start. 88CR-1 Cranking motor will start. 4 of 5

5. 14 HR (Zero speed relay) drops out. (dropouts >90 Rpm. pickup 1% 72 Rpm to start Cool down Sequence) 6. 20TV energize and closes. (IGV Hydraulic oil drain V/V). 7. 20 FG energize (energize to close) Trip oil drain Valve. 8. 88TG-1 OFF. Turning gear motor. 9. 14HT slow roll start speed relay (3.2% dropout 8% pickup) pickups to stop 88JOP-1. 10. Jacking oil pump OFF (14JOP drops out to confirm pump is stopped). 11. 14HM (2% dropout 20% pickup Minimum speed relay. Firing Speed) pickups. 12. 20TU energize to close (torque converter unloading valve). 13. L2TV starts (vent/purge timer) for 07 minutes. 14. R2TV Ignition permissive satisfied. 15. 20VG (energize to close) closes. 16. As 20VG closes Speed/Stop ratio valve opens. 17. (2TVX) 2F firing timer starts. For 01 minute. 18. FSR set to firing. 19. Flame detected. (20 °C rise in temperature per second) if not than flame/ ignition failure occurs. And up to 44% speed temperature is 95%) (Minimum operating speed relay) comes. 34. Turbine complete sequence indication appears on Startup window of HMI. 35. Inlet guide vane control on 36. IGV opens to 60.8° 37. NGR closes if selected on auto.

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