77519221-44BC-line-1-7SD522.doc

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1. GENERAL DATA AND INFORMATION.

Panel No. 6L1B Designation 87L1-1/21-1/67N-1

Make SIEMENS Model No 7SD5221-5DB29-7HM7-2A

Serial No BF0710070 Aux.volts 125 VDC No of BO contacts BO31 No of BIContacts BI24 2. MECHANICAL CHECKS AND VISUAL INSPECTION.

ITEM DESCRIPTION REMARKS

1. Inspect for any physical damage or defects.  Yes  N/A

2. Verify connections as per approved drawing.  Yes  N/A

3. Check tightness of all connections.  Yes  N/A

4. Test switch / plug checked for correct function.  Yes  N/A

3. ELECTRICAL TESTS FUNCTION TEST

ITEM DESCRIPTION REMARKS

1. Case Earthing checked  Yes  N/A

2. Indication checked  Yes  N/A

3. Trip/Output contacts checked  Yes  N/A

4. Binary input checked  Yes  N/A

4. METERING CHECK.

4.1 CURRENT INPUT CHECK: Phase Injected

Amps(A) CT Ratio Applied

Displayed secondary value(A) Displayed Primary value (A) RN 1.00 800/1A 1.00 799 YN 1.00 800/1A 1.00 798 BN 1.00 800/1A 1.00 799 RN 0.50 800/1A 0.50 399 YN 0.50 800/1A 0.50 399 BN 0.50 800/1A 0.50 399

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4.2 VOLTAGE INPUT CHECK:

Phase _Voltage(V)Injected PT Ratio Applied _{secondary value(V)}Displayed Displayed Primary_{value (KV)}

RN 66.40 115KV/115V 66.35 66.00 YN 66.40 115KV/115V 66.33 66.00 BN 66.40 115KV/115V 66.35 66.00 RN 33.20 115KV/115V 33.17 33.00 YN 33.20 115KV/115V 33.16 33.00 BN 33.20 115KV/115V 33.17 33.00 RY 115 115KV/115V 114.89 115.00 YB 115 115KV/115V 114.90 115.00 BR 115 115KV/115V 115.00 115.00

INPUT INJECTED VALUE EXPECTED VALUE DISPLAYED VALUE RYB Frequency 3 ph nominal voltage

& Current with 0 degree Phase shift. Voltage = 66.4 P-N Current = 1A

60HZ 60 .0HZ

RYB P 159 MW 159.0 MW

RYB Q 0 MVAR 0.00 MVAR

RYB S 159 MVA 159 MVA

RYB PF 1.00 1.00

Calculated : P = √3 VI Cos Ф Q = √3 VI Sin Ф S = √3 VI

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BINARY INPUT

CONTACTS REMARKS BINARY OUTPUT

CONACTS _REMARKS _LED _REMARKS

BI 1 K17-K18 OK BO 1 K5-K6 OK 1 OK BI 2 J1-J2 OK BO 2 K5-K7 OK 2 OK BI 3 J3-J5 OK BO 3 K5-K8 OK 3 OK BI 4 J4-J5 OK BO 4 K9-K10 OK 4 OK BI 5 J6-J5 OK BO 5 K11-K12 OK 5 OK BI 6 J7-J8 OK BO 6 K13-K14 OK 6 OK BI 7 J9-J10 OK BO 7 K15-K16 OK 7 OK BI 8 J11-J12 OK BO 8 R1-R5 OK 8 OK BI 9 P17-P18 OK BO 9 R2-R5 OK 9 OK BI 10 N1-N2 OK BO 10 R3-R5 OK 10 OK BI 11 N3-N5 OK BO 11 R4-R5 OK 11 OK BI 12 N4-N5 OK BO 12 R6-R5 OK 12 OK BI 13 N6-N5 OK BO 13 R7-R8 OK 13 OK BI 14 N7-N8 OK BO 14 R9-R10 OK 14 OK BI 15 N9-N10 OK BO 15 R11-R12 OK BI 16 N11-N12 OK BO 16 P3-P4 OK BI 17 H17-H18 OK BO 17 P6-P5 OK BI 18 G1-G2 OK BO 18 P7-P5 OK BI 19 G3-G5 OK BO 19 P8-P5 OK BI 20 G4-G5 OK BO 20 P9-P10 OK BI 21 G6-G5 OK BO 21 P11-P12 OK BI 22 G7-G8 OK BO 22 P13-P14 OK BI 23 G9-G10 OK BO 23 P15-P16 OK BI 24 G11-G12 OK BO24 H3-H4 OK BO 25 H6-H5 OK BO 26 H7-H5 OK BO 27 H8-H5 OK BO 28 H9-H10 OK BO 29 H11-H12 OK BO 30 H13-H14 OK BO 31 H15-H16 OK 5. DIFFERENTIAL PROTECTION.

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Operating unit: 87L1: I diff> Remarks: Pick up tolerance 5% of set value or 10mA Phase Setting current(A) Pick up value (A) Drop off value(A) Remarks

R 0.3 0.317 0.164 OK Y 0.3 0.317 0.162 OK B 0.3 0.317 0.164 OK RY 0.3 0.317 0.164 OK YB 0.3 0.316 0.162 OK BR 0.3 0.316 0.162 OK RYB 0.3 0.317 0.162 OK 5.1 Time measurement. SETTING CURRENT:2.50 x Is :2.50 x 0.3 =0.750 A Phase _current(Is)Setting Measured time at_{2.5xIs(m.sec)} Tolerance

RN 0.3 28.4 Typical :29.0mse YN 0.3 28.1 BN 0.3 28.7 RY 0.3 28.6 YB 0.3 28.0 BR 0.3 28.7

5.2 MEASUREMENTS FOR DIFF & BIAS CURRENT WITH LOCAL RELAY. Measurements are made in % of Idiff.L1 set.

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I diff L1 set: 0.3

Phase _ampsInj. Local end measurement in % of I diff set. Remote end measurement in % of I diff se Idiff.

L1 I diff.L2 I diff.L3 I rest.L1 I rest.L2 I rest.L3 3I0Idiff I diff .L1 Idiff .L2 I diff .L3 I rest . L1 I rest . L2 I rest . L3 3I0I diff A 1.0 99.6 0.00 0.00 31.9 31.4 31.4 99.5 99.5 0.00 0.00 31.6 31.3 31.4 99.5 B 1.0 0.00 99.6 0.00 31.3 32.1 31.6 99.6 0.00 99.5 0.00 31.4 32.4 31.4 99.4 C 1.0 0.00 0.00 99.7 31.3 31.6 31.6 99.6 0.00 0.00 99.6 31.3 31.4 32.4 99.7 ABC 1.0 99.7 99.6 99.6 32.1 32.1 31.9 0.00 99.3 99.5 99.6 32.1 32.5 32.4 0.00

Note :I diff = Vector sum of local +remote amps.

Bias =magnitude of I diff L1 set + errors in measurements. 5.3 RESTRAIN CHARECTERISTIC MEASUREMENT. I Diff set: 1A

I bias: I diff set (Diff Characteristic Angle 45 deg.)

Phase _{injected amps(A)}Local end Remote injected_amps(A) _Measured(%)I Diff _measured(%)I Restrain

A 1 1.333 33.2 33.6

B 1 1.333 33.3 33.6

C 1 1.332 33.0 33.3

5.4 87 L2 second stage diff. I Diff.: >>

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Phase PU Amps Trip time (ms) Tolerance

R 0.986 13.5 Pick up 5% or 10 mA.

Y 0.987 13.4

B 0.985 13.7

6. DISTANCE PRORECTION:

ZONE AND TIME SETTINGS: RELAY CHARACTERISTICS (Quadrilateral)

Parameter Z1 Z1B Z2 Z3 Z4 Z5

Direction Forward Forward Forward Forward Reverse Non-directional

R 1.00 1.50 2.00 3.00 4.0 5.00

X 1.00 1.50 2.00 3.00 4.0 5.00

Re 1.00 1.50 2.00 3.00 4.0 5.00

Time (sec) 0.00 0.00 0.60 0.80 1.0 1.50 Set XE/XL: 1.0 RE/RL:1.0

R-resistive reaches for phase to phase Fault. Re-resistive reach for phase to earth fault.

X-reactive reaches for phase to phase & phase to earth fault.

6.1 IMPEDENCE REACH TEST:

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1 Print out from freja attached OK 6.2 OPERATING TIME TEST:

Sl.No. Description Checked

1 Print out from freja attached OK

7. POWER SWING DETECTION: 1. Operation checked : OK

2. Blocking time measured using oscilographic recorder : 83 ms 8. DISTURBANCE RECORDER:

Checked event recording through DIGSI software: OK 9. FAULT LOCATER:

X=0.15 ohm/Km Distance: 10.0 KM Tolerance 2.5%

Distance Applied X_value Expected_distance Measured distance(KM)

AN BN CN AB BC CA ABC

25 _0.375 _2.5 _2.5 _2.5 _2.5 _2.5 _2.5 _2.6 _2.5

50 _0.750 _5.0 _5.0 _5.0 _5.0 _5.0 _5.0 _5.0 _5.0

75 _1.125 _7.5 _7.5 _7.5 _7.5 _7.5 _7.5 _7.5 _7.5

100 _1.500 _10.0 _10.0 _10.0 _10.0 _10.0 _10.0 _10.0 _10.0

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Permissive under reach scheme: (PUTT) Set Z1=80% Z1B Z1B=100%

Check CS with Z1.

Trip Logic ZIB x CR: OK Trip Time With Out CR: 624 ms Trip Time with CR: 21.6 ms

Permissive over reach scheme: POTT Set: Z2=Z1B

Check Cs With Z2: OK

Trip Time With Out CR : 623.4 ms Trip Time with CR: 21.9 ms Blocking scheme:

Z3 reverse

CS with reverse zone: OK

Trip Time with CR : 635ms Trip Time with out CR : 35.5 ms

11. RESIDUAL EARTH FAULT PROTECTION (DEF):

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DIRECTION SET VALUE MEASURED_TRIPPING MEASURED_BLOCKING FORWARED α =338 β=122 337.7 - 121.1 121.3-337.8 REVERSE α= 338 β= 122 121.1 - 338.1 338 -121.1 Sensitivity check:

Characteristics: DEF forward

Set value Io (Amp) Measured Io (amp) Set value Vo (Volts) Measured Vo (Volts) Pick up Drop off Pick up Drop off

0.5 0.504 0.474 2 2.01 1.86

1.0 1.006 0.946 5 5.01 4.66

TIME MEASUREMENT: set Io = 1.5 x Is= 1.5 A Sl.no Set time (sec) Actual time(sec)

1 ₁ _1.03

2 ₂ _2.02

12. TELE PROTECTION SCHEME FOR DEF PROTECTION:

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Send logic : forward fault. : OK Trip time with CR : 26.9ms Trip logic: forward fault +CR: OK Trip time without CR: 1.02 Sec. Week in feed: Trip and Echo Set V 25. Measured volts: OK

Blocking

Send logic: reverse Fault: OK Trip time with CR l: 1.02 Sec Trip logic: Forward fault +NO CR: OK Trip time without CR: 26.1 ms 13. AUTOMATIC SWITCH ON TO FAULT FUNCTION:

Distance + CB close command.

Zone used for non directional Acceleration: non directional. External activation of SOTF function: Z5+ CB close command. Operating time : 39.4 ms

14. FUSE FAILURE SUPERVISION (ZERO SEQUENCE) FUNCTION:

Phase Set 3U0>(Volts) Pick up Volts Set 3I0>(Amps) Pick up(Amps) A 30 36.35 0.1 0.101 B 36.39 0.101 C _36.40 _0.101

Blocking of tripping zone in case of fuse fails in any phase: OK 15.1. BACK UP OVER CURRENT PROTECTION I>:

Phase Set value I> Operate value(Amps) Set time delay (Sec)

Op.time at 1.5 x Is (sec) PICK UP DROP OFF

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AN 1 0.999 0.933 3.0 3.03

BN 1 1.000 0.934 3.0 3.03

CN 1 0.998 0.928 3.0 3.03

BACK UP OVER CURRENT PROTECTION I>>:

Phase Set value I> Operate value(Amps) Set time delay_(Sec) Op.time at 1.5 x_{Is (sec)} PICK UP DROP OFF

AN 1.0 1.000 0.934 5.0 5.03

BN 1.0 1.002 0.934 5.0 5.03

CN 1.0 1.000 0.933 5.0 5.03

BACK UP OVER CURRENT PROTECTION I Inverse: Normal Inverse

Pickup value: Expected 10% set value above Phase Set value I>

Operate value(Amps) Set time delay (Sec)

Op.time at 3 x Is (sec) PICK UP DROP OFF Actual_time Expected_time

AN 1 1.100 1.027 0.50 3.15 3.18

BN 1 1.101 1.028 0.50 3.15 3.18

CN 1 1.100 1.026 0.50 3.15 3.18

Very Inverse

Phase Set value I>

Op.time at 3 x Is (sec)

PICK UP DROP OFF Actual

time Expected time AN 1 1.100 1.029 0.50 3.37 3.375 BN 1 1.100 1.028 0.50 3.37 3.375 CN 1 1.103 1.026 0.50 3.37 3.375 Extremely Inverse Phase Set value I>

Op.time at 3 x Is (sec) PICK UP DROP OFF Actual_time Expected_time

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AN 1 1.100 1.027 0.50 5.0 5.0

BN 1 1.100 1.027 0.50 5.0 5.0

CN 1 1.100 1.026 0.50 5.0 5.0

Long time Inverse Phase Set value I>

Op.time at 3 x Is (sec)

PICK UP DROP OFF Actual

time Expected time AN 1 1.102 1.027 0.50 30.03 30.0 BN 1 1.100 1.025 0.50 30.02 30.0 CN 1 1.100 1.026 0.50 30.00 30.0

16. TEST EQUIPMENT USED:

1. Freja 300 relay test unit

2.

FluKe-187 Multitester.

3.

TOSHIBA laptop with DIGSI software

. 4. DELL laptop with DIGSI SOFTWARE