GT- PM JobsS.No. 1 Activities TB tightness & cleaning done for GRP panel GENERATOR PROTECTION RELAY MICOM 343 P343 checked for differential protection with o/p relays operation.86U master relay tripping also checked. P343 Checked for Voltage controlled O/c protection at both Normal & undervoltage(<33% V) with o/p relays operation.86G master relay tripping also checked. P343 Checked for under frequency operation with o/p relays operation. P127 (voltage controlled o/current protection) operation & alarm checked Rotor E/F protection relays operation & tripping checked 64B tripping checked Generator transformer differential KBCH (87GT) operation & tripping checked with o/p relays operation 64ST relay operation & tripping checked with o/p relays operation 49AX & 49TX relay operation & tripping checked with o/p contacts 63AX,63TX,26AX &26TX relay operation & tripping checked with o/p contacts 86U &86 G relay operation & tripping checked From GPR(P343) 30A,30B,30C &30D relay operation & tripping checked From GPR(P343) 30E &30F relay operation & tripping checked 30G,30H,30J,30K auxillary relay operation & tripping checked From GPR(P343) Reverse Power protection relay 32 and auxillary 32 X operation Date:Remarks 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 B/U Impedance protection relay 21 and Auxillary 21x 17 Overload protection relay 51 .1 and auxillary 51.1x . 18) Stator Earth fault protection( Ct-19) 3000/1 3000/1 3000/1 3000/1 CT Ratio Secondary Injected Current Primary Current Reading .No 1 2 3 4 CT Generator Differential (Ct-4.6.17.3) Generator Transformer Differential (16.8.7.S.5.2.9) Reverse Power Protection (Ct-1. 00mA I2>2 k Setting 7 Negative phase sequence protection (Trip) MICOM 343 I2>2 kRESET I2>2 tMAX I2>2 tMIN 9.0sec I2> : Current Set 60mA 6 Negative phase sequence protection (Alarm) MICOM 343 I2>1 Time Delay : 10.64sec V Dep OC V<1 Set 35 V V Dep OC k Set : 0.000 s Operating current : Operating time: Operation checked: 86G :30H :Inject 3 phase current with reverse phase sequence .5sec Time shall be 0.6.000 s 500.0 V V>2 Time Delay : 2.4.7 In 51G RL 2.3. 35 Inject 3 phase current with reverse phase sequence I2>2 Current Set 80.000 s I set : 0.GT .GRP PANEL TEST FORMAT SL NO Checked on : PROCEDURE REMARK PROTECTION RELAY SETTING PROTECTION CHECKING AUX / 86 RELAY OPERATION V>1 Function : 1 Over voltage : Stage 1 (DVR C/O) MICOM 343 DT Operating voltage : Operating time: Operation checked: Operating voltage : Operating time: Operation checked: Operating current: Time delay : Operating checked :- 30B :Inject voltage after isolating Prot.000 s 9. PT with links in PT circuit 2 Over voltage : Stage 2 (TRIP) MICOM 343 V>2 Voltage Set : 132.0s 64B RL1.5V 5 Back up eart fault (Open Delta) P 125 (64B) Time delay : 1.7.2.5 86U :30P :- Inject voltage after isolating the links at R1 TB-34. 3 5: Inject current in B phase of Protection CT 3 Over current definite time / Thermal overload (Alarm) P 127 (51G) DT Time delay : 6s V Dep OC Char : IEC S Inverse V Dep OC I> Set : 800 mA 4 Over current (Voltage controlled) MICOM 343 V Dep OC TMS : 0.0 s 3.3s V>2 Function : DT 30T :86G :Inject voltage after isolating Prot.8 Time shall be 1.4 Ue> 5.3 Current inj (2xIs) OP Time (Nor Vol): OP Time (Red Vol): Operation checked: Operating current : Operating time: Operating current : Operating time: Operation checked: 30R : 86G :- Inject current in CT terminalsR1 TB-1 5. PT with links in PT circuit Check the Output at DVR panel also V>1 Voltage Set : 121 V V>1 Time Delay : 0. 50 mA K1.0 s Ffail2 DO Timer : 1.0 s Is : 4.0% 15 Generator differential MICOM 343 Is2 – 1.1 s FFail1 DO Timer : 1.0 s Rotor earth fault – Stage 1 (Alarm) Operating phase angle: Time delay : Operation checked: VAEM 2/64F1 (timer) Operation checked: 12 Rotor earth fault – Stage 2 CAEM 64F2 :64F2X: 86U :-P>1 Setting 13 Reverse power (Stage –1) MICOM 343 Power1 TimeDelay : 1.0 V 8 Stator Earth fault 95% (NGT) MICOM 343 VN>1 Time Delay : 1.0 s Xa2 : 9.5 ohms Loss of excitation/Field failure (without U/V) Xb2 : 164 ohms MICOM 343 Time delay: 2.0 W Operating current : 30K :Inject PT voltage and current in reverse direction Inject PT voltage in RY phase to check operatin of relay 64F1 :86G :Operating phase angle: Time delay : Operating voltage : Operating current : GPR RL 15. 24 :86U :Inject voltage in the PT input from NGT after isolating PT with links in PT Circuit VN>1 Voltage Set : 7.2A K2 – 150% Operating time: OP current (O/P side): OP current (Neu side): 86G:30J: 86U :Inject current in both OP side and Neutral side CT input in all phase Operating time: Operating current : 86G :30Q : : 4.GT .GRP PANEL TEST FORMAT VN>1 Function DT Operating voltage : Time delay : Operation checked: Xa1 : 9.0mA 14 Reverse power (Stage 2) (MWTU14) Ts :1.0 s Checked on : 9 10 11 Inject PT voltage and current in reverse direction .5 s Is1.16 :Inject voltage above 77Volts and change the angle of current to operate the relay 86G : Operating voltage : Operating current : 30L : Inject voltage below 77Volts and change the angle of current to operate the relay GPR RL 17.5 ohms Loss of excitation/Field failure ( with U/V) Xb1 : 164 ohms MICOM 343 Time delay: 0. 000 s Operating Freq: 86G :F<1 Setting MICOM 343 F<1 Time Delay F<2 Setting 2.0 s 100.0 V Enabled 4.13 87GTX1:Inject RY voltage and reduce frequency Inject current after bypassing stab resistance in REF input Inject current in both HV side and LV side CT input in all phase 1.0mV VN3H< Delay 18 100% stator E/F MICOM 343 V< Inhibit set P< Inhibit P< Inhibit set VN3H> Delay Over Frequency 19 (MICOM 343) MICOM 343 86G : 86U :20 Generator Overall Diff prot KBCH OP current (HV side): OP current (LV side): OP current: 21 REF KBCH 87GT RL0 : 87GT .000 s Operating Freq: Operating volt 30D :30S :48.50 Hz Inject voltage and reduce the frequency 100% St EF VN3H> 1.4 Inject current in R2 TB1-12.GT . S/B E/F (64ST) P 122 Time : 1.50 Hz Operating volt 30C :Inject voltage and reduce the frequency Checked on : 47.0 s GPR RL 14 86U :30N: Check the operation of 86U by shorting the DO of MICOM relay 2.RL6 : 86U :Operating vol: 21 Over fluxing (Alarm) KBCH Operating Freq: Operating time : Is : 0.2.3.5s Operating time : Operating vol: 23 Over fluxing (TRIP) KBCH Operating Freq: Operating time : 87GTX2:86U :Inject RY voltage and reduce frequency 86U :Operating Current : 64ST RL1.0 V .RL1 : 87GT RL5 : 87GT .0 W 1.4 In ( 0.GRP PANEL TEST FORMAT 16 Under frequency – Stage 1 (Alarm) (MICOM 343) Under frequency – Stage 2 (trip) 17 (MICOM 343) MICOM 343 F<2 Time Delay VN3H< Enabled VN3H< 500.4 x 5A) 22 Gen TR. Marshalling box Check operation by shorting R2 TB2. Marshalling box Operation checked: 28 TR Buchholz (Alarm) MVAAM 13 63AX:- Operation to be checked from TR. Marshalling box 95 deg C 27 TR Oil Temp (Trip) MVAAM 13 Operation checked: 26TX:86U:- Operation to be checked from TR.13. Marshalling box 85 deg C 26 TR Oil Temp (Alarm) MVAAM 13 Operation checked: 26AX :- Operation to be checked from TR.33 Check operation by shorting R2 TB2. Marshalling box Checked on : 105 deg C 25 TR Winding Temp (Trip) MVAAM 13 Operation checked: 49T X:86U:- Operation to be checked from TR.GRP PANEL TEST FORMAT 95 deg C 24 TR Winding Temp (Alarm) MVAAM 13 Operation checked: 49AX :Operation to be checked from TR.GT . Marshalling box Operation checked: 30 TR PRD Trip MVAAM 13 63PX:86U:- Operation to be checked from TR.31 Check operation by shorting R2 TB2. Marshalling box Operation checked: 31 OIL Level Alarm MVAAM 13 63OLX:- Operation to be checked from TR.30.32.14 32 MARK -V TRIP MVAAM 11 Operation checked: 30AX1:86U:- 33 CO2 PNL TRIP MVAAM 11 Operation checked: 30AX2: 86U: 34 DVR PNL TRIP MVAAM 11 Operation checked: 86G : TESTED BY : CHECKED BY : . Marshalling box Operation checked: 29 TR Buchholz (Trip) MVAAM 13 63TX:86U:- Operation to be checked from TR.