77519221-44bc-line-1-7sd522

1

JAL International

SITE INSPECTION AND TEST RECORD

Description

7SD522 LINE DIFF.RELAY &DISTANCE PROTECTION.Sheet No: 0f

CustomerSEC-ERBCustomer Ref:

Site115/34.5KV JUBAIL(44BC)S/SContract No :

1. GENERAL DATA AND INFORMATION.Panel No.6L1BDesignation87L1-1/21-1/67N-1

MakeSIEMENSModel No7SD5221-5DB29-7HM7-2A

Serial NoBF0710070Aux.volts125 VDC

No of BO contactsBO31No of BIContactsBI24

2. MECHANICAL CHECKS AND VISUAL INSPECTION.ITEMDESCRIPTIONREMARKS

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

ITEMDESCRIPTIONREMARKS

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:

PhaseInjected Amps(A)CT Ratio AppliedDisplayed secondary value(A)Displayed Primary value (A)

RN1.00800/1A1.00799

YN1.00800/1A1.00798

BN1.00800/1A1.00799

RN0.50800/1A0.50399

YN0.50800/1A0.50399

BN0.50800/1A0.50399

4.2 VOLTAGE INPUT CHECK:

PhaseInjected Voltage(V)PT Ratio AppliedDisplayed secondary value(V)Displayed Primary value (KV)

RN66.40115KV/115V66.3566.00

YN66.40115KV/115V66.3366.00

BN66.40115KV/115V66.3566.00

RN33.20115KV/115V33.1733.00

YN33.20115KV/115V33.1633.00

BN33.20115KV/115V33.1733.00

RY115115KV/115V114.89115.00

YB115115KV/115V114.90115.00

BR115115KV/115V115.00115.00

INPUTINJECTED VALUEEXPECTED VALUEDISPLAYED VALUE

RYB Frequency3 ph nominal voltage & Current with 0 degree Phase shift.

Voltage = 66.4 P-N

Current = 1A60HZ60 .0HZ

RYB P159 MW159.0 MW

RYB Q0 MVAR0.00 MVAR

RYB S159 MVA159 MVA

RYB PF1.001.00

Calculated :

P = 3 VI Cos Q = 3 VI Sin

S = 3 VIINPUT & OUTPUT FUNCTIONAL CHECK: BINARY

INPUT

CONTACTS

REMARKS

BINARY

OUTPUT

CONACTS

REMARKSLED

REMARKS

BI 1K17-K18OKBO 1K5-K6OK1OK

BI 2J1-J2OKBO 2K5-K7OK2OK






BI 8J11-J12OKBO 8R1-R5OK8OK

BI 9P17-P18OKBO 9R2-R5OK9OK

BI 10N1-N2OKBO 10R3-R5OK10OK





BI 15N9-N10OKBO 15R11-R12OK

BI 16N11-N12OKBO 16P3-P4OK

BI 17H17-H18OKBO 17P6-P5OK

BI 18G1-G2OKBO 18P7-P5OK






BI 24G11-G12OKBO24H3-H4OK

BO 25H6-H5OK

BO 26H7-H5OK

BO 27H8-H5OK

BO 28H9-H10OK

BO 29H11-H12OK

BO 30H13-H14OK

BO 31H15-H16OK

5. DIFFERENTIAL PROTECTION.Operating unit: 87L1: I diff> Remarks: Pick up tolerance 5% of set value or 10mA

PhaseSetting current(A)Pick up value (A)Drop off value(A)Remarks

R0.30.3170.164OK

Y0.30.3170.162OK

B0.30.3170.164OK

RY0.30.3170.164OK

YB0.30.3160.162OK

BR0.30.3160.162OK

RYB0.30.3170.162OK

5.1 Time measurement. SETTING CURRENT:2.50 x Is :2.50 x 0.3 =0.750 A

PhaseSetting current(Is)Measured time at 2.5xIs(m.sec)Tolerance

RN0.328.4Typical :29.0mse

YN0.328.1

BN0.328.7

RY0.3 28.6

YB0.328.0

BR0.328.7

5.2 MEASUREMENTS FOR DIFF & BIAS CURRENT WITH LOCAL RELAY.Measurements are made in % of Idiff.L1 set.I diff L1 set: 0.3PhaseInj.

ampsLocal end measurement in % of I diff set.Remote end measurement in % of I diff se

Idiff. L1I diff.

L2I diff.

L3I rest. L1I rest. L2I rest. L33I0I diffI diff.L1Idiff.L2I diff.L3I rest. L1I rest. L2I rest. L33I0I diff

A1.099.60.000.0031.931.431.499.599.50.000.0031.631.331.499.5

B1.00.0099.60.0031.332.131.699.60.0099.50.0031.432.431.499.4

C1.00.000.0099.731.331.631.699.60.000.0099.631.331.432.499.7

ABC1.099.799.699.632.132.131.90.0099.399.599.632.132.532.40.00

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.)

PhaseLocal end injected amps(A)Remote injected amps(A)I Diff Measured(%)I Restrain measured(%)

A11.33333.233.6

B11.33333.333.6

C11.33233.033.3

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

Set Amps: 1.0 A Injected amps : 2.5 x In=2.5 A PhasePU AmpsTrip time (ms)Tolerance

R0.98613.5Pick up 5% or 10 mA.

Y0.98713.4

B0.98513.7

6. DISTANCE PRORECTION:ZONE AND TIME SETTINGS: RELAY CHARACTERISTICS (Quadrilateral)

ParameterZ1Z1BZ2Z3Z4Z5

DirectionForwardForwardForwardForwardReverse Non-directional

R1.001.502.003.004.05.00

X1.001.502.003.004.05.00

Re1.001.502.003.004.05.00

Time (sec)0.000.000.600.801.01.50

Set XE/XL: 1.0 RE/RL:1.0R-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:

Sl.No.DescriptionChecked

1Print out from freja attachedOK

6.2 OPERATING TIME TEST:

Sl.No.DescriptionChecked

1Print out from freja attachedOK

7. POWER SWING DETECTION:

1. Operation checked : OK2. Blocking time measured using oscilographic recorder : 83 ms8. DISTURBANCE RECORDER:

Checked event recording through DIGSI software: OK9. FAULT LOCATER:X=0.15 ohm/Km Distance: 10.0 KM Tolerance 2.5% DistanceApplied X valueExpected distanceMeasured distance(KM)

ANBNCNABBCCAABC

25

0.3752.52.52.52.52.52.52.62.5

50

0.7505.05.05.05.05.05.05.05.0

75

1.1257.57.57.57.57.57.57.57.5

100

1.50010.010.010.010.010.010.010.010.0

10.TELE PROTECTION SCHEME FOR DISTANCE PROTECTION:

Permissive under reach scheme: (PUTT)Set Z1=80% Z1B Z1B=100%Check CS with Z1.Trip Logic ZIB x CR: OKTrip Time With Out CR: 624 msTrip Time with CR: 21.6 msPermissive over reach scheme: POTT

Set: Z2=Z1B

Check Cs With Z2: OK

Trip Time With Out CR : 623.4 msTrip Time with CR: 21.9 msBlocking scheme:Z3 reverse

CS with reverse zone: OK

Trip Time with CR : 635ms Trip Time with out CR : 35.5 ms11. RESIDUAL EARTH FAULT PROTECTION (DEF): Angular measurement: Tolerance: 2DIRECTIONSET VALUEMEASURED TRIPPINGMEASURED BLOCKING

FORWARED =338

=122

337.7 - 121.1121.3-337.8

REVERSE= 338

= 122

121.1 - 338.1338 -121.1

Sensitivity check:

Characteristics: DEF forwardSet value Io (Amp)Measured Io (amp)Set value Vo (Volts)Measured Vo (Volts)

Pick upDrop offPick upDrop off

0.50.5040.47422.011.86

1.01.0060.94655.014.66

TIME MEASUREMENT: set Io = 1.5 x Is= 1.5 ASl.noSet time (sec)Actual time(sec)

1

11.03

2

22.02

12. TELE PROTECTION SCHEME FOR DEF PROTECTION:Directional comparison:

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: OKBlocking

Send logic: reverse Fault: OK Trip time with CR l: 1.02 SecTrip logic: Forward fault +NO CR: OK Trip time without CR: 26.1 ms13. 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 ms14. FUSE FAILURE SUPERVISION (ZERO SEQUENCE) FUNCTION:PhaseSet 3U0>(Volts)Pick up VoltsSet 3I0>(Amps)Pick up(Amps)

A3036.350.10.101

B36.390.101

C

36.400.101

Blocking of tripping zone in case of fuse fails in any phase: OK15.1. BACK UP OVER CURRENT PROTECTION I>:PhaseSet value I>Operate value(Amps)Set time delay

(Sec)Op.time at 1.5 x Is (sec)

PICK UPDROP OFF

AN10.9990.9333.03.03

BN11.0000.9343.03.03

CN10.9980.9283.03.03

BACK UP OVER CURRENT PROTECTION I>>:PhaseSet value I>Operate value(Amps)Set time delay

(Sec)Op.time at 1.5 x Is (sec)

PICK UPDROP OFF

AN1.01.0000.9345.05.03

BN1.01.0020.9345.05.03

CN1.01.0000.9335.05.03

BACK UP OVER CURRENT PROTECTION I Inverse:Normal Inverse Pickup value: Expected 10% set value above PhaseSet value I>Operate value(Amps)Set time delay

(Sec)Op.time at 3 x Is (sec)

PICK UPDROP OFFActual timeExpected time

AN11.1001.0270.503.153.18

BN11.1011.0280.503.153.18

CN11.1001.0260.503.153.18

Very InversePhaseSet value I>Operate value(Amps)Set time delay



AN11.1001.0290.503.373.375

BN11.1001.0280.503.373.375

CN11.1031.0260.503.373.375

Extremely InversePhaseSet value I>Operate value(Amps)Set time delay



AN11.1001.0270.505.05.0

BN11.1001.0270.505.05.0

CN11.1001.0260.505.05.0

Long time InversePhaseSet value I>Operate value(Amps)Set time delay



AN11.1021.0270.5030.0330.0

BN11.1001.0250.5030.0230.0

CN11.1001.0260.5030.0030.0

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 SOFTWARETested By JAL INTLTest Witnessed By SEC

Name: SENTHIL KUMAR.AName: Mr. MOEED

Sign:Sign:

Date:Date:

_1171006824.bin

77519221-44bc-line-1-7sd522

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