Diff Micom P543 GT1-3 Line Diff#

1. RELAY IDENTIFICATION:

Bay No. : Aux. Voltage : 125VDC Bay Name : Serial No. :

Manufacturer : AREVA Type : MICOM P54331AE6M0540K C.T Ratio : 3000/1 Amp VT Ratio : 380/0.115kV

Frequency : 50/60 Hz Function : 87L1

Rated Current : 1/5 Amp IP/OP Voltage : 110/125 VDC Soft Ware : P543____6__540_C Drawing No : 10P54302 Fiber Optic Converter:

2. MECHANICAL CHECKS AND VISUAL INSPECTION:

ITEM DESCRIPTION CHECKED

1 Inspect for physical damage / defects. 2 Verify connection as per approved drawings. 3 Check tightness of all connections.

4 Check Ferrules. 5 Check apparatus lists.

3. ELECTRICAL TESTS:

1 Case earthing checked

2 Test switch checked for correct function. 3 Human Machine Interface (HMI) checked 4 Indications Checked

5 Reset of indications checked.

4. OPTO I/P STATUS CHECKED:

Apply DC Voltage (125 V) at each terminals of each OPTO I/P.

Check at HMI; System Data Menu; Opto I/P Status; each I/P should change from (0) state (1) state.

5. LED STATUS CHECKED:

Note: From the Local HMI Go to Commissioning Test, Test LEDS (Apply Test).

6. OUTPUT CONTACTS FUNCTION CHECKED :

OPTO RELAY No TERMINAL FUNCTION STATUS CHECKED

1 D1 – D2 SPARE 2 D3 – D4 CB CLOSED 3 D5 – D6 CB OPEN 4 D7 – D8 SPARE 5 D9 – D10 SPARE 6 D11 – D12 VT FAIL 7 D13– D14 SPARE 8 D15– D16 SPARE 9 F1 – F2 SPARE 10 F3 – F4 SPARE 11 F5 – F6 SPARE 12 F7 – F8 SPARE 13 F9 – F10 SPARE 14 F11 – F12 SPARE 15 F13 – F14 SPARE 16 F15 – F16 SPARE

LED No FUNCTION COLOUR STATUS CHECKED

1 DIFF TRIP A R

2 DIFF TRIP B R

3 DIFF TRIP C R

4 DIFF START Y

5 DIFF INTER TRIP R

6 TEST LOOP BACK Y

7 COMM FAIL Y

Note: From the Local HMI Go to Commissioning Test, Test mode (blocked), Test Pattern mode and select each relay to be tested and Apply Contact Test, after test; apply remove test to de-energized the relay.

OUTPUT RELAY No TERMINALS FUNCTION STATUS CHECKED

1 H1 – H2 86C1 DIFF TRIP

2 H3 – H4 SPARE

3 H5 – H6 DIFF TRIP CP,FR,FMK

4 H8 – H9 DIFF START FR

5 H11 – H12 DIFF TRIP A SOE

6 H14 – H15 DIFF TRIP B SOE

7 H17 – H18 DIFF TRIP C SOE

8 G1 – G2 DIFF COMM FAIL SOE

9 G3 – G4 SPARE

10 G5 – G6 SPARE

11 G8 – G9 BATTERY FAIL

12 G11 – G12 V,T FAIL

13 G14 – G15 DIFF. START SOE

14 G17 – G18 SPARE

7. RELAY BURDEN:

ITEM DESCRIPTION DC Voltage (V)

Current (mA) Watts Limits W

1 Normal Condition <11

2 Fault Condition <13

Limits according to the Catalogue for Technical Data – P543/en TD/ H53 – Page : 32 SUPPLY OFF TERMINALS (CLOSED) - (J11, J12) : TERMINALS (OPEN) - (J13, J14) : SUPPLY ON TERMINALS (CLOSED) - (J13, J14) : TERMINALS (OPEN) - (J11, J12) :

8. CURRENT TRANSFORMER SHORTING CONTACTS:

Current Input Terminals Shorting Checked I R C3 – C2 – C1 I B C6 – C5 – C4 I Y C9 – C8 – C7 I N C15 – C14 – C13 * I M C12 – C11 – C10 *

* Not be checked because it is not used in the scheme.

This table according to the Catalogue for Commissioning and Maintenance – P54x/EN CM/G53 – Page No; 11

9. TIME AND DATE CHECK:

If the time and date is not being maintained by an IRIG-B signal, so in the event of the auxiliary supply failing, with a battery fitted in the relay, the time and date will be maintained.

To test this, remove the auxiliary supply from the relay for approximately 30 seconds, on restoring the auxiliary supply the time and date should be correct.

Result: ____________

A. SECONDARY INJECTION TEST IN CLOSE LOOP MODE INTERNAL

- To check secondary values go to measurement 1.

- To check primary values go to measurement setup, set local values to: primary values, then Go to Measurement 1.

CURRENT INPUTS CHECK:

INPUT CT APPLIED VALUE_(A)

CT RATIO APPLIED (A) DISPLAYED SECONDARY VALUE (A) DISPLAYED PRIMARY VALUE (A) IA IB IC IN **

Limit: Current Measurement Accuracy = 10mA or ± 10% .As per the manual P543/en TD/ H53 – Page: 24 VOLTAGE INPUTS CHECK:

INPUT VT APPLIED VALUE_(V) VT RATIO APPLIED (V) DISPLAYED SECONDARY VALUE (V) DISPLAYED PRIMARY VALUE (KV) VAB VBC VCA VA VB VC VN**

Limit: Voltage Measurement Accuracy = ±1%. As per the manual P543/en TD/ H53 – Page: 24 ACTIVE, REACTIVE AND APPARENT POWER CHECK:

- Injected 66.4V and 1.0A with 45º lagging. Measurement prints out attached. - To check the values go to measurement 2.

- Line angle (ӨL) = 45 degree.

- P = V * I * COS (ӨL) and Q = V * I * SIN (ӨL)

PHASE Calculated _(MW) Measured _(MW) Calculated _(MVAR) Measured _(MVAR) Calculated _(MVA) Measured _(MVA) A

B C

11. PICK UP & DROP OFF TEST FOR DIFFERENTIAL CURRENT (Id):

To avoid absence of fiber optic communication then blocking of differential protection element; At Commission Tests menu, Set '' Test Loop back '' is '' Internal ''. Through HMI only.

Pick Up Value = 0.5 x (Is1 + K1 x I bias ) A Where; K1 = 30 % = 0.3 P.U

Drop Out Value = 0.75 x (Pick Up Value) A

PHASE SETTING Is1 (A) Injected Current I bias A Expected Pick Up Value (A) Measured Pick Up Value (A) Expected Drop Out Value (A) Measured Drop Out Value (A) R-N 0.2 0.1 0.115 0.08625 0.4 0.2 0.23 0.1725 0.6 0.3 0.345 0.2587 Y-N 0.2 0.1 0.115 0.08625 0.4 0.2 0.23 0.1725 0.6 0.3 0.345 0.2587 B-N 0.2 0.1 0.115 0.08625 0.4 0.2 0.23 0.1725 0.6 0.3 0.345 0.2587 R-Y 0.4 0.2 0.23 0.1725 Y-B 0.4 0.2 0.23 0.1725 B-R 0.4 0.2 0.23 0.1725 R-Y-B 0.4 __ 0.23 0.1725

Limits: Pick up & Drop Out ±10%

According to the Catalogue for Technical Data – P543/en TD/ H53 – Page: 10

12. OPERATING TIME TEST FOR DIFFERENTIAL CURRENT (Id ):

Set; DT Mode & Is1 = 0.4 In & K1 = 30 % & Is2 = 4 In & K2 = 150 %

Phase Inject current (A) Delay Time (ms) Operating Time _(ms) R 0.8 Zero (Inst) 0.8 250 0.8 ₅₀₀ Y 0.8 Zero (Inst) 0.8 250 0.8 500 B 0.8 _{Zero (Inst)} 0.8 250 0.8 500 R-Y 0.8 250 Y-B 0.8 250 B-R 0.8 250 R-Y-B 0.8 250 Accuracy: Instantaneous Operation: <30 ms.

Definite Time Operation: ± 2 % or 20 ms whichever is greater.

According to the Catalogue for Technical Data – P543/en TD/ H53 – Page: 10

According to the Catalogue for Twice time current injected – P54X/ENCM- Page: 174 Sec 6.3.3.2

13. BIAS CHARACTERISTIC TESTING:

For local testing of the relay put in the Loop back mode, At Commission Tests menu, Set '' Test Loop back '' is '' Internal ''. Through HMI only.

І – LOWER SLOPE

Connect the test circuit as shown figure.

Current is injected into the R phase which is used as the bias current and another current is injected into the Y phase which is used as differential current.

Inject a bias current of 1A in the R phase. The relay will trip and any LED associated with the R phase will operate.

Slowly increase the current in the Y phase until phase Y trips . Record the phase Y current magnitude and check that it corresponds to the following equation;

I

= 0.5 * (I

+I

K

) A

Where; IS1; The Basic Diff Current Setting. K1; The Lower Percentage Bias Setting. Set; IS2 = 4 In

To check more than one point at the same slope, Change the bias current value and the equation above can be used, and also for other differential settings '' Different slopes, Is1 ''.

Apply the above procedure for each phase.

K1 IS1 I bias A

Id calculated Id Measured Errors %

R Y B R Y B

30 % 0.2 1 0.25

3 0.55 0.4 1 0.35 2 0.5 3 0.65 0.6 1 0.45 2 0.6 3 0.75 40 % 0.2 1 0.3 2 0.5 3 0.7 0.4 1 0.4 2 0.6 3 0.8 0.6 1 0.5 2 0.7 3 0.9 50 % 0.2 1 0.35 2 0.6 3 0.85 0.4 1 0.45 2 0.7 3 0.95 0.6 1 0.55 2 0.8 3 1.05

Limits; ± 10 % According to the Catalogue for Commissioning and Maintenance – P54x/EN CM/G53 – Pages No; 30 & 31

П

– UPPER SLOPE

Repeat the test and check the result with the following equation;

I

= 0.5 X [(6 X K2) – {(K2 – K1) X I

} + I

] A

Is2; The Bias Current Threshold Setting. K2; The High Percentage Bias Setting.

IS1 & K1 are Fixed; IS1 = 0.2 A , K1 = 30 % K2 Is2 I bias A Id calculated Id Measured Errors % R Y B R Y B 50% 2 5 1.15 6 1.4 7 1.65 3 5 1.05 6 1.3 7 1.55 4 5 0.95 6 1.2 7 1.45 100 % 2 5 1.9 6 2.4 7 2.9 3 5 1.55 6 2.05 7 2.55 4 5 1.2 6 1.7 7 2.2 150% 2 5 2.65 6 3.4 7 4.15 3 5 2.05 6 2.8 7 3.55 4 5 1.45 6 2.2 7 2.95

Limits; ± 10 % According to the Catalogue for Commissioning and Maintenance – P54x/EN CM/G53 – Pages No ; 30 & 31

14. VTS FUNCTION TEST:

LOSS OF ONE OR TWO PHASE TEST:

FIXED SETTING Negative sequence threshold used by the elements are V2= 10V. (As per Catalogue P54x/EN OP/B74 Page No:05)

Note: Inject three phase (66.4) balance voltage during test of particular phase to reduce that phase voltage until the fuse failure operates.

Phase Under Test

Measure Voltage (Vo) Volts

Measure Neg Seq

Voltage (V2) Set Time (Sec) Measured Time (Sec) A

B C

LOSS OF THREE PHASE VOLTAGE TEST:

FIXED SETTING Phase voltage level detector is fixed and will drop off at 10V and pick up at 30V. (As per Catalogue P54x/EN OP/B74 Page No: 05)

Note: Inject three phase (66.4) balance voltage during testing all phase voltage decrease until the fuse failures operate.

Measure Voltage Volts Drop out Voltage Volts Set Time (Sec) Measured Time (Sec)

15. FINAL SETTING:

CT Ratio 2000/1 Amp

PT Ratio ; 380/0.115 kV

General Configuration:

Setting Group ; Group 1

Phase Differential: Enabled Differential Prot Comm IM64

Scheme Set: Address: Baud Rate: Clock Source:

Communication Delay Tolerance: Communication Fail Timer: Char Mode Time:

Differential Characteristics Configuration Phase Is1:

Phase Is2: Phase K1: Phase K2:

Phase Characteristic: Phase Time Delay: Phase TMS: Phase Time Dial: P I T Time: Compensation: Susceptance: Inrush Restraint: Vector compensation: Phase CT Correction: E.F CT Correction:

Pick Up & Drop Off Test for Differential Current (id):

PHASE SETTING Is1 (A) Injected Current Ibais A Expected Pick Up Value (A) Measured Pick Up Value (A) Expected Drop Out Value (A) Measured Drop Out Value (A) R-N 0.4 0.2 0.23 0.1725

Y-N 0.4 0.2 0.23 0.1725 B-N 0.4 0.2 0.23 0.1725 R-Y 0.4 0.2 0.23 0.1725 Y-B 0.4 0.2 0.23 0.1725 B-R 0.4 0.2 0.23 0.1725 R-Y-B 0.4 0.2 0.23 0.1725

Limits: Pick up & Drop Out ±10%

According to the Catalogue for Technical Data – P543/en TD/ H53 – Page: 10 Operating Time Test for Differential Current (id

)

Injection Current = Is1 = 0.4 A

PHASE Delay Time (ms) Operating Time (ms) R Y B R-Y Y-B R-B R-Y-B

Accuracy: Definite Time Operation; ± 2 % or 20 ms whichever is greater.

BIAS CHARACTRISTIC: І – LOWER SLOPE

IS1; the Basic Diff Current Setting. K1; the Lower Percentage Bias Setting.

Limits; ±10 % According to ''Catalogue: Commissioning and Maintenance – P54x/EN CM/G53 – Pages No 30 & 31'' П– UPPER SLOPE

Is2; The Bias Current Threshold Setting. K2; The High Percentage Bias Setting.

K2 IS2 I bias A I d calculated Id Measured Errors % R B Y R B Y 150 % 4 5 1.45 6 2.2 7 2.95

Final Setting Issue No. : ________________

Final Setting Issue Date : ________________

B. END TO END TEST (Final Setting)

P591 INTERFACE UNIT CHECK: K1 IS1 I bias A I d calculated Id Measured Errors % R B Y R B Y 30 % 0.4 1 0.35 2 0.5 3 0.65

Sr. No P591 Interface Units Checks Result 1 Visual Inspection - Channel 1 Unit _{- Channel 2 Unit}

2 Rating information - Channel 1 Unit _{- Channel 2 Unit} 3 Case Earthing - Channel 1 Unit _{- Channel 2 Unit} 4 Wiring against Diagram - Channel 1 Unit _{- Channel 2 Unit} 5 Measured Aux. Supply - Channel 1 Unit _{- Channel 2 Unit} 6 LED Working - Channel 1 Unit _{- Channel 2 Unit}

LOOPBACK TEST:

Test Method: At P593 unit REMOVE EXTERNAL WIRING FROM TBs 3,4,7 & 8 AND JUMPER TB 3 to 7 AND TB 4 to 8

Sr. No Description Result

1 Signal strength received by P593 -Channel 1 Unit (-16.8dBm to -25.4dBm) . - Channel 2 Unit (-16.8dBm to -25.4dBm)

2 Signal strength transmitted by P593 -Channel 1 Unit (-16.8dBm to -28.8dBm) _{. - Channel 2 Unit (-16.8dBm to -28.8dBm)}

3

o Normalize Tx and Rx cables b/w P543 and P593 and put P543 in Test loopback ‘External’ mode.

o Reset alarm indications.

o Check loopback alarm is still active and not reset.

o Check communication working (Channel status, propagation delay etc.)

Prop. Delay Channel Status - Channel 1 Unit

- Channel 2 Unit

COMMINUCATION FAILURE CHECK.

Function Checked

Local Relay Remote TESTED BY : Thyssenkrupp Xervon COUNTER SIGNED BY : SIEMENS WITNESSED BY : SEC-COA

Relay Disconnect a fiber optic channel '' Alarm should appeared''

Reconnect a fiber optic channel '' Alarm should disappeared'' Communication equipment

SECONDARY INJECTION CHECK.

SINGLE PHASE INJECTION AT LOCAL RELAY

Phase Injection Current ( A ) Remote End Checked

R 1

Y 1

B 1

SINGLE PHASE INJECTION AT REMOTE END RELAY

Phase Injection Current ( A ) Local Checked

R 1

Y 1

B 1

PICK UP AND DROP OUT TEST FOR DIFFERENTIAL CURRENT (Id): Pick up value = (Is1 + K1 * Ibias) Ampere.

Ibias = 0.5 (IL + IR)

Drop out value = 0.75 * (pick up value) Ampere.

Phase Setting Is1 (A) Expected Value (A)

Measured Pickup Value (A)

Measured Dropout Value (A)

R 0.4 0.46

Y 0.4 0.46

B 0.4 0.46

Limits :Pick up = Setting 10% and Drop out = (0.75 x Setting) 10%. According to Catalogue for technical data – P543/en TD/J74- Page no 2-6.

OPERATING TIME TEST FOR DIFFERENTIAL CURRENT (Id):

Phase Injected Current (A) Setting Delay Time (ms)

Measured Operating Time (ms)

R 0.8 0

B 0.8 0 Limits : Definite time operation : ± 2% or 20ms which ever is greater.

According to catalogue for technical data – P543 /en TD /J74 – page no 2-8. LOWER SLOP CHECK:

SETTING, IS1 = 0.4 Amp and K1 = 30% Where Is1 = the basic differential setting. K1 = the lower percentage bias setting. Id calculated = (Is1 + Ibias K1) Ampere. Ibias = 0.5 (IL + IR)

Note: Inject the both ends bias current same, adjust the differential current zero by current angle then increase the local current until the relay operates. Record the differential and Bias current.

Injected I Rem ote (Amp) Ibias calculated (Amp) Remote Relay Optd R Y B Ibias measured (Amp) Idiff calculated (Amp) Idiff measured (Amp) Local Relay Optd PHASE Injected I Local (Amp)

Limits: ± 10% According to catalogue for CM –P54x/EN CM/I 74 - page no 10-36.

UPPER SLOP CHECK:

SETTING, IS1 = 0.4 Amp, IS2 = 4.0 Amp, K1 = 30% and K2 = 150%. Id calculated = K2* Ibias – (K2 - K1)IS2 + IS1 Ampere. Ibias = 0.5 (IL + IR)

Note: Inject the both ends bias current same, adjust the differential current zero by current angle then increase the local current until the relay operates. Record the differential and Bias current.

R Y B PHASE Injected I Local (Amp) Injected I Remote (Amp) Ibias calculated (Amp) Remote Relay Optd Ibias measured (Amp) Idiff calculated (Amp) Idiff measured (Amp) Local Relay Optd Limits : ± 10% According to catalogue for CM –P54x/EN CM/ I 74- page no 10-37.

MEASURED DIFFERENTIAL CURRENT: Injected CURRENT 1Amp From one side.

Go to Measurement 3 and record the Differential Current.

Phase DIFFERENTIAL CURRENT CT REVERSE CT NORMAL R Y B INTERTRIP CHECK

Put a jumper between terminals ''H1 & H2'' intertrip output contact, the remote end CB should tripped, and repeat this from remote end.

Inter trip Function CB Trip Checked From Local Relay

From Remote Relay

C. ONLOAD CHECKS

CONFIRM CURRENT TRANSFORMER WIRING Phase Secondary Current Values

Using a Multimeter

Secondary Current Values With The Relay's Measured

R B Y N

Limits; 1 % According to the Catalogue for Commissioning and Maintenance – P54x/EN CM/G53 – Page No ; 40

MEASURE CAPACITIVE CHARGING CURRENT

With the feeder energized from one end only, Compare local and remote measured currents in the MEASUREMENT 3 menus at HMI to confirm that the feeder capacitive charging current is similar to that expected on all three phases.

Check that the setting of ( Is1 ) is higher than 2.5 times the capacitive charging current. Phase Local Current Remote Current Check Is1 > 2.5 Icap

R Y B

According Catalogue for Commissioning and Maintenance – P54x/EN CM/G53 – Page No; 40

CHECK DIFFERENTIAL CURRENT

With the feeder supplying load current check that the relay measurements in the MEASUREMENTS 3 menu at HMI are as expected and that the differential current is similar to the value of capacitive charging current previously measured for all three phases.

Phase Current Differential Measured Check Id ≈ Icap TESTED BY : Thyssenkrupp Xervon COUNTER SIGNED BY : SIEMENS WITNESSED BY : SEC-COA

R Y B 18. REMARKS: ATTACHMENTS;

1- Final setting file is downloading from the relay and printed.

2- PSL '' Programmable Logic Scheme'' files which include a configuration of I/P & O/P contacts and Leds, is downloading from the relay and printed.