GT- PM Jobs Date:-S.No. Activities Remarks

1 TB tightness & cleaning done for GRP panel

GENERATOR PROTECTION RELAY MICOM 343

2

3

4

5

Rotor E/F protection relays operation & tripping checked6 64B tripping checked

7

8

9

10

11

1213 30E &30F relay operation & tripping checked

14

15

16 B/U Impedance protection relay 21 and Auxillary 21x 17 Overload protection relay 51 .1 and auxillary 51.1x

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

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)

30G,30H,30J,30K auxillary relay operation & tripping checked From GPR(P343)

Reverse Power protection relay 32 and auxillary 32 X operation

S.No CT CT Ratio 1 Generator Differential (Ct-4,5,6,7,8,9) 3000/12 Reverse Power Protection (Ct-1,2,3) 3000/1

3 3000/14 Stator Earth fault protection( Ct-19) 3000/1

Secondary Injected Current

Primary Current Reading

Generator Transformer Differential (16,17,18)

GT - GRP PANEL TEST FORMAT Checked on :

SL NO PROTECTION RELAY SETTING PROTECTION CHECKING PROCEDURE REMARK

1 MICOM 343

V>1 Function : DT Operating voltage : 30B :-

V>1 Voltage Set : 121 V Operating time:

V>1 Time Delay : 0.3s Operation checked:

2 Over voltage : Stage 2 (TRIP) MICOM 343

V>2 Function : DT Operating voltage : 30T :-

V>2 Voltage Set : 132.0 V Operating time: 86G :-

V>2 Time Delay : 2.000 s Operation checked:

3 P 127 (51G)

I set : 0.7 In Operating current: 51G RL 2, 3 5:

DT Time delay :

Time delay : 6s Operating checked :-

4 Over current (Voltage controlled) MICOM 343

V Dep OC Char : IEC S Inverse

V Dep OC I> Set : 800 mA Current inj (2xIs) 30R :

V Dep OC TMS : 0.3 OP Time (Nor Vol): 86G :- Time shall be 1.5sec

V Dep OC V<1 Set 35 V OP Time (Red Vol): Time shall be 0.64sec

V Dep OC k Set : 0.4 Operation checked:

5 Back up eart fault (Open Delta) P 125 (64B)Ue> 5.5V Operating current : 64B RL1,2,3,4.5

Time delay : 1.0sec Operating time: 86U :-

6 MICOM 343

I2> : Current Set 60mA Operating current : 30P :-

I2>1 Time Delay : 10.0s Operating time:

Operation checked:

7 MICOM 343

I2>2 Current Set 80.00mA

I2>2 k Setting 9.000 s Operating current : 30H :-

I2>2 kRESET 9.000 s Operating time:

I2>2 tMAX 500.0 s Operation checked: 86G :-

I2>2 tMIN 3.000 s

AUX / 86 RELAY OPERATION

Over voltage : Stage 1 (DVR C/O)

Inject voltage after isolating Prot. PT with links in PT circuit

Check the Output at DVR panel also

Inject voltage after isolating Prot. PT with links in PT circuit

Over current definite time / Thermal overload (Alarm)

Inject current in B phase of Protection CT

Inject current in CT terminalsR1 TB-1 5,6,7,8

Inject voltage after isolating the links at R1 TB-34, 35

Negative phase sequence protection (Alarm)

Inject 3 phase current with reverse phase sequence

Negative phase sequence protection (Trip)

Inject 3 phase current with reverse phase sequence

GT - GRP PANEL TEST FORMAT Checked on :

8 Stator Earth fault 95% (NGT) MICOM 343

VN>1 Function DT

VN>1 Voltage Set : 7.0 V Operating voltage : GPR RL 17, 24 :-

VN>1 Time Delay : 1.0 s Time delay : 86U :-

Operation checked:

9 MICOM 343

Xa1 : 9.5 ohms Operating voltage : 30L :

Xb1 : 164 ohms Operating current :

Time delay: 0.1 s Operating phase angle: 86G :

FFail1 DO Timer : 1.0 s Time delay :

10 MICOM 343

Xa2 : 9.5 ohms Operating voltage : GPR RL 15,16 :-

Xb2 : 164 ohms Operating current :

Time delay: 2.0 s Operating phase angle: 86G :-

Ffail2 DO Timer : 1.0 s Time delay :

11 VAEM

Operation checked: 64F1 :-

2/64F1 (timer)

12 Rotor earth fault – Stage 2 CAEM

Operation checked: 64F2 :-

64F2X:

86U :-

13 Reverse power (Stage –1) MICOM 343-P>1 Setting : 4.0 W Operating current : 30K :-

Power1 TimeDelay : 1.0 s Operating time: 86G :-

14 Reverse power (Stage 2) (MWTU14)Is : 4.0mA Operating current : 30Q :

Ts :1.5 s Operating time: 86G:-

15 Generator differential MICOM 343

Is1- 50 mA OP current (O/P side): 30J: -

K1- 0% OP current (Neu side): 86U :-

Is2 – 1.2A

K2 – 150%

Inject voltage in the PT input from NGT after isolating PT

with links in PT Circuit

Loss of excitation/Field failure ( with U/V)

Inject voltage below 77Volts and change the angle of

current to operate the relay

Loss of excitation/Field failure (without U/V)

Inject voltage above 77Volts and change the angle of

current to operate the relay

Rotor earth fault – Stage 1 (Alarm)

Inject PT voltage in RY phase to check operatin of relay

Inject PT voltage and current in reverse direction

Inject PT voltage and current in reverse direction

Inject current in both OP side and Neutral side CT input in all

phase

GT - GRP PANEL TEST FORMAT Checked on :

16 MICOM 343F<1 Setting 48.50 Hz Operating volt 30C :-

(MICOM 343) F<1 Time Delay 2.000 s Operating Freq: 30D :-

17Under frequency – Stage 2 (trip)

MICOM 343F<2 Setting 47.50 Hz Operating volt 30S :-

(MICOM 343) F<2 Time Delay 2.000 s Operating Freq: 86G :-

18 100% stator E/F MICOM 343

VN3H< Enabled

VN3H< 500.0mV 30N:

VN3H< Delay 1.0 s

V< Inhibit set 100.0 V 86U :-

P< Inhibit Enabled

P< Inhibit set 4.0 W

100% St EF VN3H> 1.0 V

VN3H> Delay 1.0 s

19Over Frequency

MICOM 343

GPR RL 14

(MICOM 343) 86G :

20 Generator Overall Diff prot KBCH

86U :-

OP current (HV side): 87GT RL0 :

OP current (LV side): 87GT ,RL1 :

21 REF KBCH

OP current: 87GT RL5 :

87GT ,RL6 :

86U :-

21 Over fluxing (Alarm) KBCH

Operating vol:

Operating Freq: 87GTX1:-

Operating time :

22 Gen TR. S/B E/F (64ST) P 122Is : 0.4 In ( 0.4 x 5A) Operating Current : 64ST RL1,2,3,4 Inject current in R2 TB1-12,13

Time : 1.5s Operating time : 86U :-

23 Over fluxing (TRIP) KBCH

Operating vol:

Operating Freq: 87GTX2:-

Operating time : 86U :-

Under frequency – Stage 1 (Alarm) Inject voltage and reduce the

frequency

Inject voltage and reduce the frequency

Check the operation of 86U by shorting the DO of MICOM

relay

Inject current in both HV side and LV side CT input in all

phase

Inject current after bypassing stab resistance in REF input

Inject RY voltage and reduce frequency

Inject RY voltage and reduce frequency

GT - GRP PANEL TEST FORMAT Checked on :

24 TR Winding Temp (Alarm) MVAAM 1395 deg C Operation checked: 49AX :-

25 TR Winding Temp (Trip) MVAAM 13105 deg C Operation checked: 49T X:-

86U:-

26 TR Oil Temp (Alarm) MVAAM 1385 deg C Operation checked: 26AX :-

27 TR Oil Temp (Trip) MVAAM 1395 deg C Operation checked: 26TX:-

86U:-

28 TR Buchholz (Alarm) MVAAM 13

Operation checked: 63AX:-

29 TR Buchholz (Trip) MVAAM 13

Operation checked: 63TX:-

86U:-

30 TR PRD Trip MVAAM 13

Operation checked: 63PX:-

86U:-

31 OIL Level Alarm MVAAM 13

Operation checked: 63OLX:-

32 MARK -V TRIP MVAAM 11Operation checked: 30AX1:-

86U:-

33 CO2 PNL TRIP MVAAM 11Operation checked: 30AX2:

86U:

34 DVR PNL TRIP MVAAM 11Operation checked: 86G :

TESTED BY : CHECKED BY :

Operation to be checked from TR. Marshalling box

Operation to be checked from TR. Marshalling box

Operation to be checked from TR. Marshalling box

Operation to be checked from TR. Marshalling box

Operation to be checked from TR. Marshalling box

Operation to be checked from TR. Marshalling box

Operation to be checked from TR. Marshalling box

Operation to be checked from TR. Marshalling box

Check operation by shorting R2 TB2- 30,31

Check operation by shorting R2 TB2- 32,33

Check operation by shorting R2 TB2- 13,14