P345 Relay Test Report

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ALSTOM Grid Najran Power Plant –SEC-SOA

Signature

Name LAKSHMANAN PAULRAJ ENGR. MOHAMMED A. ALMAKRAMI

Date 16-10-12 16-10-12

1. RELAY DATA

RATINGS:

Current 1/5 A Model No. P345311K3N0360K

Voltage 100-120VAC S. No. 965449T

Frequency 60Hz Software Ref. 360K

2. CHECKS

S. No. on module, case and cover are identical Relay case connected to a local earth bar

3. WATCHDOG RELAY CHECK

Check status of watchdog contacts as below

Terminals Contact Status Remarks

Relay De- energized Relay Energized

M11-M12 Closed Open OK

M13-M14 Open Closed OK

4. FIELD VOLTAGE

Measure the field voltage across M7 (+) and M9 (-)…… .49.19VDC.……… (Check that the voltage is about 48V DC)

Repeat the test for terminals M8 (+) and M10 (-) …………49.21VDC………..

INSTRUMENT NAME: CMC-256 SERIAL NO: CD749G

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5. MECHANICAL CHECKS AND VISUAL INSPECTION:

Sl.no General checks Result

Ok (Y/N)

1. Inspect for no physical damage. Y

2. Verify the wiring connection as per approved drawing. Y

3. Relay case connected to a local earth bar. Y

4. Confirm ring type lugs are used for CT/VT and DC circuits. Y

5. Power up the relay circuit and check relay is healthy. Y

6. Send the relay setting configuration file to relay through Front RS232

communication Port. Y

7. Relay Test ID on front label and the serial number in the display

match. Y

6. OPTO-COUPLER STATUS

This is to verify the healthiness of the DC Opto inputs.

- Apply a rated voltage at each spare binary input and verify the status of the input at Front panel. - Opto Inputs status can be monitored using front LCD “System Data “.

- Scroll down “System Data “ to Opto input status , using the Key. Use key to identify which bit correlates to under test.

Note: Only spare inputs shall be checked with external voltage initiation and other inputs shall be checked during respective functional test.

OPTO Input No. Terminal Configuration Result

OPTO 01 E1-E2 CB OPEN OK

OPTO 02 E3-E4 SPARE OK

OPTO 09 G1-G2 SPARE OK OPTO 010 G3-G4 SPARE OK OPTO 011 G5-G6 SPARE OK OPTO 012 G7-G8 SPARE OK OPTO 013 G9-G10 SPARE OK OPTO 014 G11-G12 SPARE OK OPTO 015 G13-G14 SPARE OK OPTO 016 G15-G16 SPARE OK

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Date 16-10-12 16-10-12

7. LED CHECK

Check the operation of all LED’s on the relay front panel

LED No. Allocation Result

LED 01 REVERSE POWER

OK

LED 02 FIELD FAILURE

OK

LED 03 NPS THERMAL

OK

LED 04 GEN. DIFFERENTIAL

OK

LED 05 ROTOR EARTH FAULT

OK

LED 06 100% STATOR EARTH FAULT

OK

LED 07 UNDER VOLTAGE

OK

LED 08 OVER VOLTAGE

OK

Function Keys LEDS check:

LED No. Allocation Result

FN LED 01 UNDER FREQUENCY

OK

FN LED 02 CBF TRIP

OK

FN LED 03 VOLTAGE BALANCE

OK

FN LED 04 Vdep OVER CURRENT

OK

FN LED 05 OVER FLUX(V/Hz)

OK

FN LED 06

DEAD MACHINE

OK

FN LED 07

52G CB OPEN

OK

FN LED 08

SPARE

OK

FN LED 09

52G CB CLOSE

OK

FN LED 10

ANY START

OK

8. OUTPUT RELAY CHECKS

This is to verify the healthiness of the Control output relay healthiness.

Operate each Spare output through “ Commissioning Test “ on front LCD, Check continuity of the contact that closes.

- Scroll to “Commissioning Test “, use to test mode.

- Change “Test Mode“ to Contact Blocked. Under Test pattern identify the output to close. “Apply Test” using the “ Contact test” option.

- Reset the output relays by setting cell [COMMISSIONING TESTS, Contact Test] to “Remove Test”.

Note: Only spare outputs shall be checked using above procedure and other Outputs shall be checked during respective functional test.

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Date 16-10-12 16-10-12

Output Relay No. Terminal Configuration(IEC NO.S) Result

RL 1 L1-L12 60

OK

RL 2 L3-L4 27

OK

RL 3 L5-L6 87G,64S

OK

RL 4 L7-L8 59,81,32,64R & 46

OK

RL 5 L9-L10 51-27 & 40

OK

RL 6 L11-L12 40

OK

RL 7 L13-L14-L15 46

OK

RL 8 L16-L17-L18 87G

OK

RL 9 K1-K2 51-27

OK

RL 10 K3-K4 81

OK

RL 11 K5-K6 64S

OK

RL 12 K7-K8 59

OK

RL 13 K9-K10 64R

OK

RL 14 K11-K12 81

OK

RL 15 K13-K14-K15 64B

OK

RL 16 K16-K17-K18 32

OK

RL 17 J1-J2 CBF

OK

RL 18 J3-J4 CBF

OK

RL 19 J5-J6 CBF

OK

RL 20 J7-J8 CBF

OK

RL 21 J9-J10 CBF

OK

RL 22 J11-J12 CBF

OK

RL 23 J13-J14-J15 60

OK

RL 24 J16-J17-J18 59

OK

RL 25 H1-H2 27

OK

RL 26 H3-H4 81

OK

RL 27 _H5-H6 _51-27

_OK

RL 28 _H7-H8 ₄₆

_OK

RL 29 H9-H10 40

OK

RL 30 H11-H12 32

OK

RL 31 _H13-H14-H15 _{GENERAL ALARM}

_OK

RL 32 _H16-H17-H18 _{ANY TRIP}

_OK

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Date 16-10-12 16-10-12

9. MEASUREMENT CHECK

Note:

- This test is intended to verify the CT/VT inputs and CT Ratio, VT Ratio setting in the local relay.

- During the injection on one phase, the LCD will show that the angle of that phase changing randomly but angle measurement is not required.

When inject 3ph current, the LCD will display correct angles.

VTR: 14.4kV/120V // CTR: 2000/1 A APPLIED & MEASURED CURRENT:

, Current Applied: 1.0 A, Tolerance +5%

Applied

Ph-Current Expected Current Measured Current

Result Ok (Y/N) IA-1 2000 A 2005 A Y IB-1 2000 A 2005 A Y IC-1 2000 A 2005 A Y IA-2 2000 A 2006 A Y IB-2 2000 A 2005 A Y IC-2 2000 A 2005 A Y IN-1 IN-2 2000 A 2004 A 2006 A Y

APPLIED & MEASURED VOLTAGE:

Voltage Applied: V ( Ph-N) AC, Tolerance +5%

Applied Ph-Voltage

Measured Values (Applicable only for 230kV) Result Ok (Y/N)

PHASE AN MAG<ANG PHASE BN MAG<ANG PHASE CN MAG<ANG

AN 8.335kV, 0˚deg - - Y

BN - 8.334kV, -120˚deg - Y

CN - - 8.334kV, 120˚deg Y

ABCN AB 14.44kV BC Y CA 14.44kV Y

10. DIFFERENTIAL PROTECTION (87G):

Biased differential protection

In a biased differential relay, the through current is used to increase the setting of the differential element.

For heavy through faults, it is unlikely that the CT outputs at each zone end will be identical, due to the

effects of CT saturation. In this case a differential current can be produced. However, the biasing will

increase the relay setting, such that the differential spill current is insufficient to operate the relay.

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The through current is calculated as the average of the scalar sum of the current entering and leaving the

zone of protection. This calculated through current is then used to apply a percentage bias to increase the

differential setting. The percentage bias can be varied to give the operating characteristic shown in Figure

2.

10.1 Differential Protection Settings:

Item Description Setting

1 IS1 100mA

2 IS2 1.0 A

3 K1 0%

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10.2 Pickup Test Setting (ISI):

Expected: I I Diff I > [IS1/(1-0.5K1)]

PHASE IA-1 IB-1 IC-1 Expected Value

Pick Up - Amps 100 mA 100 mA 100 mA 100.0 mA

PHASE IA-2 IB-2 IC-2 Expected Value

Pick Up - Amps 100 mA 100mA 100 mA 100.0mA

10.3 Bias Characteristic Test: ΙBIAS = (Ι1 + Ι2)/2

ΙDIFF > K2.ΙBIAS – (K2 – K1) Ιs2 + Ιs1 +/- 20% where ΙBIAS > Ιs2

PHASE I1 I2 IRESTRAIN Expected IDIFF Measured IDIFF

A 1.0 1.411 1.205 0.408 0.413

B 2.0 8.416 5.231 6.446 6.447

C 3.0 1.22 2.11 1.77 1.78

10.4 Operating Time Test With DT Characteristic: Operating Time at I = 1A T = 0 Sec

Phase A B C Expected Value

Operating Time 21.2 mSec 18.6 mSec 20.7 mSec < 40 m Sec

11. 100% STATOR EAERTH FAULT PROTECTION

Enabled Element: VN 3RD HARMONIC -VN3H< 1V Characteristic: DT Delay Time: 1 sec

11.1 PICKUP TEST

Phase Measured Pick-up Measured Drop-off

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Date 16-10-12 16-10-12

11.2 DEFINITE TIME CHARACTERISTICS

CURRENT SETTING: VN3H< 1V TIME SETTING: 1 sec

APPLIED VOLTAGE Measured Time (Sec)

0.5 V 1.03 sec

12. UNDER FREQUENCY PROTECTION (81U):

12.1 Under Frequency Protection:

1 F<1 Status Enabled

2 F<1 Setting 56 Hz

3 F<1 Time Delay 5.0 sec

4 F<2 Status Enabled

5 F<2 Setting 58 Hz

6 F<2 Time Delay 30.0 sec

12.2 First Stage Under Frequency Pickup Check:

Frequency Setting (Hz) Operated Frequency (Hz)

56 Hz 56.0 Hz

12.3 First Stage Under Frequency Operating Time Check:

Injected Frequency (Hz) Measured Operating Time (S)

54 Hz 5.06 Sec

12.4 Second Stage Under Frequency Pickup Check:

58 Hz 58.0 Hz

12.5 Second Stage Under Frequency Operating Time Check:

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Date 16-10-12 16-10-12

12.6 OVER FREQUENCY PROTECTION (81U):

12.7 Over Frequency Protection:

1 F>1 Status Enabled

2 F>1 Setting 62.4 Hz

3 F>1 Time Delay 2.0 sec

4 F>2 Status Disabled

12.8 First Stage Over Frequency Pickup Check:

62.4 Hz 62.40 Hz

12.9 First Stage Over Frequency Operating Time Check:

66 Hz 2.05 Sec

13. OVERVOLTAGE/ UNDERVOLTAGE PROTECTION (59/27):

13.1 Overvoltage Protection:

1 V> Measurement Mode Phase-Phase

2 V> Operate Mode Any Phase

3 V>1 Function DT

4 V>1 Voltage Set 127 V

5 V>1 Time Delay 2.00 Sec

13.1.1 Stage-I Overvoltage Pickup Check:

Phase Reference Voltage Setting Operated Voltage

AB

127

127.1 BC

127

127.1 CA

127

127.1

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Date 16-10-12 16-10-12

13.1.2 Stage-I Operating Time Check:

Phase Reference Applied Voltage (V) Measured Operating Time

AB

127 2.033 sec

BC

127 2.034 sec

CA

127 2.031 sec

13.2 Undervoltage Protection:

1 V< Measurement Mode Phase-Phase

2 V< Operate Mode Any Phase

3 V<1 Function DT

4 V<1 Voltage Set 102 V

5 V<1 Time Delay 2.00 Sec

6 V<1 Pole Dead Inh Enabled

13.2.1 Stage-I Under Voltage Pickup Check:

Phase Reference Voltage Setting (V) Operated Voltage

AB

102 102.0 V

BC

102 101.9 V

CA

102 101.9 V

13.2.2 Stage-I Operating Time Check:

Phase Reference Applied Voltage (V) Measured Operating Time

AB

101 2.027 sec

BC

101 2.028 sec

CA

101 2.026 sec

14. REVERSE POWER PROTECTION (32R):

14.1 Reverse Power Protection:

1 Power 1 Function Enabled

2 -P>1 Setting 11.0 W

3 Power 1 Time Delay 1.5 sec

4 Power 1 DO Timer 0.0 sec

5 P1 Pole dead Enabled

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Date 16-10-12 16-10-12

14.1.1 Reverse Power Pickup Check:

-P>1 Setting Applied Voltage (V) Applied Current (A) Calculated Pick -up Power Measured Power 11 W 69.20 V 53 mA 11.01 W 10.99 W

Note: The current should be 180 degree phase displaced from the reference voltage phases.

14.1.2 Reverse power Operating Time Check:

Applied Power in (W) Measured Operating Time (S)

20 1.53 sec

15. THERMAL NEGATIVE PHASE SEQUENCE PROTECTION (46T):

15.1 Negative Phase Sequence Settings:

1 I2>1 Alarm Enabled

2 I2>1 Current Set 40 mA

3 I2>1 Time Delay 5 Sec

4 I2>2 Trip Enabled

5 I2>2 Current Set 70 mA

6 I2>2 k Set 3.8 sec

7 I2>2 kRESET 3.8 sec

8 I2>2 tMAX 500 sec

9 I2>2 tMIN 6.0 sec

15.1.1 Thermal NPS Alarm Function Check: I2>1 Alarm set (mA) Pickup Value (mA) I2>1 Alarm set (sec) I2>1 Alarm (sec) 40 mA 41 mA 5 sec 5.059sec

15.1.3 Thermal NPS Tripping Function Check:

Note: The negative phase sequence thermal characteristic is given as

Injected I2 Current (A) Expected Operating Time Measured Operating Time

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Date 16-10-12 16-10-12

16. LOSS OF EXCITATION PROTECTION (40) 16.1 Alarm Function Checks:

1 FFail Alm Status Enabled

2 FFail Alm Angle 15.00 deg

3 FFail Alm time delay 5 sec

 Alarm observed when the injected fault Impedance above

9.5<-30ºΩ

deg after

5.04

Sec.

16.2 Field Failure 1:

1 FFail 1 Status Enabled

2 FFail 1 Xb1 240.0 Ohm

3 FFail Time Delay 2.0 Sec

4 FFail DO Timer 0 Sec

5 FFail 1 –Xa1 15 Ohm

Total Impedance (Xa1+Xb1)

Applied Voltage (V) Applied Current (A) Calculated Operated Impedance

15Ω+240Ω _{100 V, 0˚ deg} _{1A , 270˚deg}

100 Ohm



Operating Time Check

Applied Impedance

Measured Operating Time

50 Ohm(50V,0˚deg,1A, 90˚deg)

2.035 sec

Field Excitation Failure Impedance Characteristics:

1.)Apply the following voltage and current:

Va = 100V∠0°, Ia = 0.25A∠+90°.

The applied impedance is at

position “A” of the polar diagram in Figure 8.

2) Increase the current until the relay operates. This should occur at roughly 0.40A (100V/(220+15)) and indicates

that we are now at the outer edge of the circle – point “B” (Xa1+Xb1).

3) Increase the current to 0.5A. The relay should be operating strongly as the relay impedance is now at point

C. 4) Rotate the phase angle of the current anti-clockwise until the relay drops off

310°

and it is possible to reset it.

Slowly rotate the current phase angle clockwise until the relay just operates again at

295°

. Record the phase

angle between the current and voltage (θ1 on the polar diagram).

15°

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through the operating area, until once again it is possible to reset the relay at

225°

. Slowly rotate the current

phase angle anti-clockwise until the relay again just operates at 240°. Measure the new angle, θ2 on the polar

diagram.

The relay characteristic angle is the mean of the two measured angles and should be

roughly 0°.

17. SYSTEM BACKUP PROTECTION:

17.1 Voltage Restrained Settings:

1 Backup Function Volt Controlled

2 Vector Rotation None

3 V Dep OC Char DT

4 V Dep OC I> set 0.800 A

5 V Dep OC Delay 1.50 sec

6 V Dep OC tRESET 0.0 sec 7 V Dep OC V<1 Set 36.0 V

9 V Dep OC k Set 0.10

17.2 Pickup Test:

Item Condition Pick Up(I>) tI> sec Remarks

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2 Vs < V<1 0.080 A 1.526 sec

18. GENERATOR ROTOR EARTH FAULT PROTECTION: 18.1 Rotor Earth Fault Settings:

1 Injection Frequency 0.25 Hz

2 CL I/P Select CL1

3 64R R<1 Alarm Enabled 4 64R R<1 Alarm Set 40.0 kΩ

5 64R R<1 Alarm Delay 10.0 sec 6 64R R<2 Trip Enabled 7 64R R<2 Trip Set 5.0 kΩ

8 64R R<2 Trip Dly 1.0 sec 18.2 Calibration:

R Compensation = 110 Ω 18.4 Perform Timing Tests:

5.

6.

19. VTS FUNCTION TEST:

19.1 Loss of one or two phases test:

Fixed setting V2=10V

-Apply 3 Phase rated voltage (Ur V) with balanced angles.

-Apply 3 Phase rated current (Ir A) with balanced angles.

-for the phase under test start decrease the voltage on one phase and / or two phases

till you get Internal fuse fail (fuse fail without time lag).

- For time test inject voltage more than V2.and stop Omicron BO. VTF alarm

Fixed setting: V2 = 10 volt, I2> inhibit less than setting= 50 mA

I>

Inhibit less than setting= 1.25 A

Element Applied Resistance Expected Time Measured Time

64R R< 1 Alarm 10.00kΩ 10.0 sec 10.01 sec

Element Applied Resistance Expected Time Measured Time

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Phase

Pick up

Drop Off

Set Time

(sec)

Measured Time

(Sec)

One phase

38.2 V

41.2 V

5.0

5.017 Two phase

39.2 V

41.2 V

5.017 19.2 Loss of all 3 phase voltages under load condition test(detect 3p):

Fixed Setting: a- for fuse fail pick up; V1=10 volts.

b- for fuse fail reset; V1=30 volts.

Pick up

measurement

voltage(v)

Reset measurement

voltage(v)

10 V

30 V

20. Breaker Fail protection

20.1 CBF Pick-up Current Test

Current Settings

R-Phase Y-Phase B-Phase N

Pick up Drop

out Pick up Drop out Pick up

Drop

out Pick up Drop out

100mA 101 mA 99 mA 101 mA 99mA 101 mA 99 mA 101 mA 99 mA 20.2 CBF Time Test

Pick-up current set for phase and N: 0.1A , Current injected for phase and N : 0.2 A

CBF start initiated through operation of other protection.

Stage 1

Delay Set

in Sec

Delay Mesured in Sec

R

Y

B

N

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21. VOLTS/HERTZ PROTECTION :

21.1 Over fluxing Settings

Item Description Setting

1 V/Hz Status _Enabled

2 V/Hz Alarm Set _2.10

3 V/Hz Alarm Delay _{10 sec}

4 V/Hz>1 Status _Enabled

5 V/Hz>1 Trip Function _DT

6 V/Hz>1 Trip Set _2.2

7 V/Hz>1 Trip Delay _{2 sec}

21.2 Volts/Hertz Alarm Check:

V/Hz Alarm Set Hz Volts

2.1 60 124.8V

21.3 Volts/Hertz Alarm Timing Test :

V/Hz Alarm Set Alarm Delay Measured Time

2.1 10 sec 10.4

21.4 Volts/Hertz Trip Check :

V/Hz Alarm Set Hz Volts

2.2 60 131.28

21.5 Volts/Hertz Trip Timing Test :

V/Hz Trip Set Trip Delay Measured Time

2.2 2 sec 2.03 ec

22.DEAD MACHINE PROTECTION :

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Item Description Setting

1 Dead Mach Status Enabled

2 Dead Mach I> _{80.0 mA}

3 Dead Mach V< _{70 V}

4 Dead Mach tPU _{0 Sec}

5 Dead Mach tDO _{500 msec}

22.2 Dead Mach Trip Timing Test : Dead Mach Set

PU D.O Delay Set

time

Measured Time

80 mA 80mA 76mA 0 sec 31.4 m sec

FINAL CHECKS

Item Description Result

1 All test equipment, leads, shorts and test block removed safely? _OK

2 Disturbed customer wiring re-checked? _OK

3 All commissioning tests disabled? _OK

4 Circuit breaker operations counter reset? _OK

5 Current counters reset? _OK

6 Event records reset? _OK

7 Fault records reset? _OK

8 Disturbance records reset? _OK

9 Alarms reset? _OK

10 LEDs reset? _OK

11 Secondary front cover replaced? (If applicable) _OK

Remarks: ……….………. ……….………. ……….………. ……….………. ……….……….

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Date 16-10-12 16-10-12