Test forms for SS

(1)

STAMP:

QATAR TRANSMISSION SYSTEM EXPANSION – PHASE 10

SUBSTATIONS PACKAGE S5 & S8

CONSULTANT NAME

SUBSTATION NAME / CIRCUIT NAME

COMMON

B 02 Oct, 13 ISSUED FOR CONSTRUCTION T.G. PARK S.T.M S.Y.SUNG A B 16 June, 13 ISSUED FOR CONSTRUCTION T.G. PARK S.T.M S.Y.SUNG 0 B 24 APR, 13 ISSUED FOR COMMENTS T.G. PARK S.T.M S.Y.SUNG

REV. STAT. DATE DESCRIPTION DRAWN CHECK. APPRO.

CONTRACTOR NAME

MANUFACTUTRE NAME NA

MANUFACTUTRE DRAWING NUMBER NA

DRAWING / DOCUMENT TITLE

SAT PROCEDURE AND TEST FORMS FOR 11KV SWGR

SUBSTATIONS: 220/66/11kV 220/66/11kV New Doha-B Super S/S, 220/66/11kV Abu Hamur Super S/S, 220/66/11kV Ain Khalid Super S/S, Lusail Development super 3 S/S, 66/11KV Ain Khalid North S/S,

66/11KV Al Wadi West S/S

SCALE N/A SIZE A4 REV. PROJECT DRAWING NUMBER

PH10-1C-10-15-P002

(2)

LIST OF CONTENTS

SL. NO.

DESCRIPTION

PAGE NO.

1 Visual and Dimension check

6

2 Power Frequency Withstand Voltage Test

2.1. Insulation Resistance Measurement

2.2. High Voltage AC Test

8

3 Measurement of Insulation Resistance for Auxiliary circuit

10

4 Vacuum Circuit Breaker Test

4.1 Insulation Resistance Measurement

4.2 Coil Resistance Measurement

4.3 Contact Resistance Measurement

4.4 Closing Coil And Tripping Coil Pickup(Operation) Test

4.5 Breaker Timing Test

4.6 Electrical & Mechanical Operation checks

10

5 Measurement of Contact Resistance for Main Circuit

14

6 Current Transformer Test

6.1. Incomer Feeder

6.1.1 General Checks

6.1.2 Insulation Resistance Measurement

6.1.3 Polarity Test

6.1.4 Winding Resistance Measurement

6.1.5 Knee Point Voltage Measurement

6.1.6 Ratio Test

6.2.Bus-Section

6.2.1 General Checks

6.2.2 Insulation Resistance Measurement

6.2.3 Polarity Test

6.2.4 Winding Resistance Measurement

6.2.5 Knee Point Voltage Measurement

6.2.6 Ratio Test

6.3.Outgoing Feeder

6.3.1 General Checks

6.3.2 Insulation Resistance Measurement

6.3.3 Polarity Test

6.3.4 Winding Resistance Measurement

6.3.5 Knee Point Voltage Measurement

6.3.6 Ratio Test

6.4.Station Transformer Feeder

(3)

6.4.6 Ratio Test

7 Voltage Transformer Test

7.1.Incomer Feeder

7.1.1. General Check

7.1.2. Insulation Resistance Measurement

7.1.3. Polarity Test

7.1.4. Winding Resistance Measurement

7.1.5. Ratio Test

7.2.Bus VT & Outgoing Feeders

7.2.1. General Check

7.2.2. Insulation Resistance Measurement

7.2.3. Polarity Test

7.2.4. Winding Resistance Measurement

7.2.5. Ratio Test

44

8 Meter Calibration test

8.1. Ammeter Calibration Test

8.2. Voltmeter Calibration Test

54

9 CT Secondary Injection Test

56

10 VT Secondary Injection Test

80

11 CT Primary Injection Test

105 Reference Drawings:

S.NO

Description

Doc.No

Approval Status

1 Schematic for 11kV SWGR Incomer feeder

PH10-1C-10-15-3-001

A

2 Schematic for 11kV SWGR Bus section

PH10-1C-10-15-3-012

A

3 Schematic for 11kV SWGR Cable feeder

PH10-1C-10-15-3-008

A

4 Schematic for 11kV SWGR Aux transformer feeder

PH10-1C-10-15-3-007

A

5 Schematic for 11kV SWGR Capacitor feeder

PH10-1C-10-15-3-009

A

6 Schematic for 11kV SWGR Interlock Diagram

PH10-1C-10-15-3-010

I

7 Schematic for 11kv SWGR SYNCRO check

PH10-1C-10-15-3-011

B

8 Schematic for 11kv SWGR Bus1 CT Diagram

PH10-1C-10-15-3-002

I

9 Schematic for 11kv SWGR Bus2 CT Diagram

PH10-1C-10-15-3-006

I

10 Schematic for 11kv SWGR Bus Bar VT Diagram

PH10-1C-10-15-3-003

B

11 11KV SWGR General Arrangement Diagram

PH10-1C-10-15-2-002

B

12 11KV SWGR Name Plate Diagram

PH10-1C-10-15-5-001

I

(4)

LIST OF TEST INSTRUMENTS

S.NO

EQUIPMENT

MAKE/TYPE

_NUMBER

SERIAL

CALIBRATION

_DATE

CALIBRATION DUE

_DATE

1

2

3

(5)

1. VISUAL CHECK

Equipment information

DESCRIPTION INCOMER BUS SECTION OUT GOING

Make SCHNEIDER

Type

Installation INDOOR

Serial no

Rated current 2500 A 3150 A 630A

Rated frequency 50 Hz 50 Hz 50 Hz

Rated voltage 12 kV 12 kV 12 kV

Short time withstand rating 40 KA for 3Sec 40 KA for 3 Sec 40 KA for 3 Sec

Control voltage 110 VDC 110 VDC 110 VDC

Auxiliary voltage 240 VAC 240 VAC 240 VAC

(6)

Sl.No.

DESCRIPTION

RESULTS

1 Name Plate Inspection

Check each nameplate according to drawing

2 Space Heater

Check and breaking of wires of heater of HV and LV compartment

Check setting of thermostat

3 Others

3.1. Check doors closing completely

3.2. Check earthing state of doors and frame

3.3. Check all indication lamps of local panel

3.4. Check wiring condition

3.5. Check any joint in middle of wire

3.6. Check terminal block cover

3.7. Check the door limit switches

3.8. Check phase marks

3.10. Check construction and inspection of operating mechanism

4 After self test and official test check interlock lever’s set-up and it’s smooth

operation

5 Check cable number tag at cables

6 Check the proper dressing at wire duct

7 Check the cable proper glanding at the panel

8 Check insulation cover on CT&AC/DC supply terminals

9 Conformity of power/control cable connection and identification labels.

10 Check the power/control cable connection and tightness.

11 Check of component pad lock facilities.

12 All TB are numbered at both sides.

(7)

Test procedure:

1. Carry out Insulation Resistance Test (Before HV).

2. Carry out HV Test.

3. Carry out Insulation Resistance Test (After HV).

Pre-conditions:

1. Check and confirm the CT circuits should be shorted and earthed.

2. Check and confirm Bus and line VT are isolated.

3. Check and confirm Switchboard is earthed.

4. Check all VT Fuse Removed.

5. CVD contact shorted at front of Display terminals in each phase of HV test.

(Note: CVD indications to be tested at 6KV AC during the HV test.)

Safety Procedures:

(i)During the HV test 11kv SWGR Room all the access points are should be closed and locked, No-one

not permitted to remain with in the 11KV SWGR room during testing.

(ii) All the energize component will be barricaded off with rigid safety fencing.

(iii) 11KV SWGR room and basement as well as all access points are shall be locked.

2.1. IR value measurement:

Measure insulation resistance at 5000V DC before and after HV test.

R – YBE in GΩ Y-RBE in GΩ B-RYE in GΩ

Before HV Test After HV Test

2.2. HVAC test.

This test is to be carried out on each of the phases with respect to earth. AC voltage at 50Hz equal to

80% FAT value i.e 22.4kV since this test was carried out at Factory 2.5 times of the line voltage i.e 28 kV

for 1 minute was applied to the conductor with respect to ground. The leakage current is recorded and

noted as mentioned in the below table.

(Note: Since this test is carried out in factory. 80% of the 28kV i.e. 22.4 kV shall be applied in site

test.)

Test Result:

HV Test @ 22.4 kV AC for 1 Minutes

Leakage current in mA

0 Sec 30 Sec 1 min

R–YBE Y-RBE B-RYE

(8)

2.2. PARTIAL DISCHARGE TEST DURING HV TEST

(i) All secondary circuit of CT’s must be shorted.

(ii) Ground the other two phases through the bus bar at cable chamber and also at the CVD display on the

chamber.

(iii) For the selected phases apply 1.1 x E/1.732 Voltage (7.6KV)

(iv) Note down the PD value for each panel at the applied voltage.

(v) Repeat same procedure for all phases and all the feeders.

S.NO BAY NO Test voltage (kV) Measured values Result

R-PH Y-PH B-PH

1

A190

6.9KV

2

A170

6.9KV

3

A150

6.9KV

4

A130

6.9KV

Criteria: Should be less than 15 db

2.3. VT RATIO TEST AT RATED VOLTAGE:

For Incomer:

Test Results

VT Designation Phase Terminal Applied Primary Voltage in (V) Calc Sec. Voltage in (V) Measured Sec. Voltage in (V) % Error R 1r - 1nr 2r - 2nr 3r - 3nr Y 1y - 1ny 2y - 2ny 3y - 3ny B 1b - 1nb 2b - 2nb 3b - 3nb

(9)

For Bus VT & Outgoing Feeders:

VT

Designation Phase Terminal

Applied Primary Voltage in (V) Calc Sec. Voltage in (V) Measured Sec.Voltage in (V) % Error R 1r - 1nr Y 1y - 1ny B 1b - 1nb

2.4.CVD INDICATOR TEST:

CVD Indicator test have been tested with 6 kv single phase, check the all condition with individual

Phases.

CVD indications tested at 6KV AC VOLTAGE

: OK/NOT OK

Remarks:

3. MEASUREMENT OF INSULATION RESISTANCE FOR AUXILIARY CIRCUIT

Insulation Resistance Measurement

The insulation resistance between Auxiliary circuit and earth shall be measured with 1kV Megger.

Contents Measured value of Insulation Resistance Result Remarks Between the Auxiliary Circuit and Earth

Criteria: >2MΩ

Remarks:

4. VACUUM CIRCUIT BREAKER TEST

Name Plate Details

(10)

Description INCOMER BUS SECTION OUT GOING

Type

HVX 12-40-31-E HVX 12-40-31-E HVX 12-40-31-E

Serial no

Rated current 2500 A 3150 A 800A

Rated frequency 50 Hz 50 Hz 50 Hz

Rated voltage 12 kV 12 kV 12 kV

Breaking rating 40 kA 40 kA 40 kA

Control voltage 110 VDC 110 VDC 110 VDC

Auxiliary voltage 240 VAC 240 VAC 240 VAC

Breaker operating sequence O–0.3S-CO–3M-CO O–0.3S-CO–3M-CO O–0.3S-CO–3M-CO Year of manufacture

4.1. Insulation Resistance Measurement:

Applied Voltage _R-PH(GΩ) _Y-PH(GΩ) _B-PH(GΩ)

5KV Pole – Earth(Close) Pole – Pole(Open)

Criteria: 500MΩ

4.2. Coil Resistance Measurement:

Coil Resistance in Ω

Trip Coil Close Coil

Criteria: 1.Closing Coil

: 35.3 to 39.0 Ω

2. Opening Coil : 35.3 to 39.0 Ω

4.3. CB Closing & Opening check at reduced control voltage:

CB C .Voltage (110V) A .Volt [Vdc] Time (ms) Result

Close (85%) 93.5V

(11)

Operation R-PH (msec) Y-PH (msec) B-PH( (msec) Open

Close Close – Open

Criteria: 1. Closing time : 20 to 50ms

2. Opening time: 15 to 35 ms

4.5. Contact Resistance Measurement:

Criteria:

1. For Incomer & Bus Section

: < 20 µΩ

2. For Outgoing feeder

: <55 µΩ

Check List for Print out

1.Breaker timing test report

4.6. Electrical & Mechanical Operational checks for Circuit Breaker

4.6.1 Electrical checks

Sl.No

Description

Remarks

4.6.1.1 Rack In / Rack Out

4.6.1.2 Spring charge indication

4.6.1.3 Spring Charge Mechanism

1.Electrical Operation

2.Mechanical operation

4.6.1.4 Current drawn by spring charge motor

4.6.1.5 CB Spring Charge Time in Seconds

4.6.1.6 Anti-pumping checked

4.6.1.7 Open / Close Indication

4.6.1.8 Auxiliary Contacts

4.6.1.9 Operation of Counter

4.6.1.10 Tripping & Closing Operation

Operation Electrical Mechanical

Trip Close

Phase Measured Value (in

μΩ

)

R-Phase Y-Phase B-Phase

(12)

4.6.2 Mechanical Operational Checks

Sl.No

Description

Remarks

4.6.2.1 Check the correct closing/opening of the doors

a. Make to VCB at TEST position

b. Un-latch or latch the door latch

c. Lift up the door handle to opening the door

d. Push down the handle to closing the door

4.6.2.2 Circuit breaker in test and closed condition should not be possible to rack IN.

4.6.2.3 Circuit breaker in service and closed condition should not be possible to rack OUT.

4.6.2.4 Circuit breaker in between service and test position should not be possible to

Close.

4.6.2.5 Circuit breaker in test position should be possible to close or trip.

4.6.2.6 Circuit breaker in service position should be possible to close or trip.

4.6.2.7 All safety interlocks.

4.6.2.8 Smooth rack in and rack out for the circuit breaker.

4.6.2.9 Mechanical Interlock with Earth Switch

4.6.2.10 Earthing switch cannot be closed when the circuit breaker is in service position.

4.6.2.11 Circuit breaker cannot be Rack IN when the Earthing switch is Closed

4.6.2.12 Circuit breaker interchangeability test

4.6.2.13 Check the CB racking IN/OUT handle inserted properly

The positions of the Withdraw able part are described as,

State

Operations possible

Operations not possible

Withdraw able truck in service

position, switching device ‘ON’

1. Switching device shall be switched

OFF from Local/Remote.

2. Switching device shall be switched

OFF from emergency Push button.

1.Removal of the Withdraw able

truck

2.Opening of the door

3.Pulling of the LV plug

Withdraw able truck in service

position,

switching

device

‘OFF’

1. Removal of the withdraw able truck.

2. Switching device shall be switched

OFF from Local/Remote.

1. Opening of the door

2. Pulling of the LV plug

Withdraw able truck located

between the service and test

positions

Transfer of the Withdraw able truck

to service or Test position

1. Closing of the switching device

2. Opening of the door

3. Pulling of the LV plug

Withdraw able truck in test

position, switching device ‘ON’

1. Switching device shall be switched

OFF from Local/Remote.

Transfer of the Withdraw able

truck to service position

(13)

5. CONTACT RESISTANCE MEASUREMENT TEST

5.1. Bus Bar Contact Resistance

Make

:

SCHNEIDER

DC Current Injected

:

100 A DC

Pre-conditions for the measurement of BUSBAR contact resistance:

1. All the breakers are to be kept in service position.

2. Close the breakers in the bays through which current injected. And all other should be in open.

3. Ensure all the earth switches are in open position.

11KV SWITCHGEAR

Ambt Temperature :

C

SL.NO Bay -1 Identification Bay -2 Identification Bay -3 Identification R-Ph in µΩ Y-Ph in µΩ B-Ph in µΩ 1 A210 A190 ---2 A190 A170 ---3 A170 A150 ---4 A150 A130 ---5 A130 A110

---6 A110 A18- I/C -1

---7 A18- I/C -1 A90

---8 A90 A70

---9 A70 A50

---10 A50 A30

---11 A30 A10

---12 A10 A12 – Bus section A20

13 A20 A40

---14 A40 A60

---15 A60 A80

---16 A80 A100

---17 A100 A28 – I/C -2

---18 A28 – I/C -2 A120

---19 A120 A140

---20 A140 A160

---21 A160 A180

---22 A180 A200

---23 A200 A220

---24 A220 A32 – Bus Section A290

25 A290 A310 26 A310 A330 27 A330 A350 28 A350 A38 29 A38 A370 30 A370 A390 31 A390 A410 32 A410 A430 33 A430 A450 34 A450 A470

(14)

Note: For the all other test the value is for two breakers & bus.

For the test Sl.No 12 the value is for three breakers & bus.

Remarks:

5.2. Earth Switch Contact Resistance Measurement

Make

:

SCHNEIDER

DC Current Injected

:

100 A DC

Pre-conditions for the measurement of EARTH SWITCH contact resistance:

1. All the breakers are to be kept in test position.

2. Close the earth switches in the bay through which current injected, and all other should be in open.

Earth Switch

Ambt Temperature :

C

SL.NO Bay Identification R-Ph in µΩ Y-Ph in µΩ B-Ph in µΩ

1 A210

2 A190

3 A170

4 A150

5 A130

6 A110

7 A18

8 A90

9 A70

10 A50

11 A30

12 A10

13 A12

14 A20

15 A40

16 A60

17 A80

18 A100

(15)

22 A160

23 A180

24 A200

25 A220

26 A32

27 A290

28 A310

29 A330

30 A350

31 A38

32 A370

33 A390

34 A410

35 A430

36 A450

37 A470

Remarks:

6. CURRENT TRANSFORMER TEST

6.1. Incomer Feeder

(16)

Description CT1 (CORE-1) CT1 (CORE-2) CT2 (CORE-1)

Type RING

Highest system voltage 12 kV

Short time rating 40 kA for 3Sec

Ratio 2500/1A 2500/1A 3200/1A

Class PX 5P20/1.0 PX

Rated burden(VA) - 15VA

-CT sec. resistance (Rct) at 75c

in Ω 8.75≤ 8.75≤ 18≤

Knee point voltage (Vk) in V 230 - 563

I mag at VK/2 in mA ≤30≤ - 18≤ Mfg.Year/Sl.No R ph Y ph B ph CT Sec Terminals R ph 1S1-1S2 2S1-2S2 S1-S2 Y ph 1S1-1S2 2S1-2S2 S1-S2 B ph 1S1-1S2 2S1-2S2 S1-S2

Function MAIN TRF DIFF(87T) +

REF

DIR OC+BF +BCU+METERING

BUS BAR PROTN (87B/50BF)

(17)

5.Check for tightness of all CT terminals

:

6.Neutral earthing / Single point earthing

:

7.Position of P1-towards BUS/FEEDER

:

8.Check CT Connection with ring type Lugs

:

9.Check CT wire as per the Schematic diagrams and tightness

:

6.1.2 Insulation Resistance Measurement:

Minimum Value: 1M/KV

Ambt Temperature

:

ºC

Test Procedure



Check the Core to be measured



Say Typical X – Y(X is value to be checked, Y is against which value to be checked).



Connect X to - Ve Terminal of Megger



Connect Y to + Ve Terminal of Megger



Select the Voltage Rating of Megger



Operate the Megger and record Values

Test Results

Description Applied Voltage (DC)

in V R-PH(GΩ) Y-PH(GΩ) B-PH(GΩ) Primary –Earth 5000 V Primary- Secondary 1 5000 V Primary- Secondary 2 5000 V Secondary 1-Earth 500 V Secondary 2-Earth 500 V Secondary 1- Secondary 2 500 V

6.1.3. Polarity Test

(18)

(P1 towards (+) ve & P2 towards (-) ve

Test Results

CT

Designation Core No Terminal R-PH Y-PH B-PH

CT1 CORE-1 1S1-1S2

CORE-2 2S1-2S2

CT2 _CORE-1 _1S1-1S2

6.1.4. CT Winding Resistance

Test Procedure



Isolate primary/ secondary / Neutral earth.



Switch on the kit



Select the current transformer page



As per instructions given by manual enter the test current(0.1A to 1.0A) and Pressing the start button,

the test card displays



The deviation of the measurement over time during the period of charging the winding



The Kit will automatically performers a discharging of winding after saving the measurement



Measures the DC Voltage

(19)

Designation R-Ph Y-Ph B-Ph

At ambT At 75C At ambT At 75C At ambT At 75C

CT1 CORE-1 1S1-1S2

CORE-2 2S1-2S2

CT2 CORE-1 1S1-1S2

Ambt Temperature :

ºC

Temperature at

75C

= Rt (1+0.00393(75-t)

Where, 75

: Resistance at 75°C (Ω)

Rt : Resistance at ambient temperature (Ω)

t : Ambient temperature (°C)

Criteria: Resistance shall be less than specified CT specification.

6.1.5. Knee Point Voltage measurement

Test Procedure



Do the connection as shown fig.



Isolate primary/ secondary / Neutral earth.



Switch on the kit



Select the current transformer page



The necessary wiring is only two leads from the voltage output to the open secondary wiring of the CT.



After entering the current and voltage limits and pressing the start button, the test card displays.



Carry out the test.



The knee point will be automatically calculated by the kit.



After test an automatic sequence of demagnetization is performed.



The test is done using a regulated voltage source.



Do the same for all other cores.

(20)

Test Results CT

Designation Core No Terminal

R-Ph Y-Ph B-Ph Vk (V) Imag (mA) Vk (V) Imag (mA) Vk (V) Imag ( mA) CT1 CORE-1 1S1-1S2 CORE-2 2S1-2S2 CT2 CORE-1 1S1-1S2

Criteria: Accordance with CT specification.

6.1.6. Ratio Test

Test Procedure



Do the connection as shown fig.



Isolate primary/secondary/neutral earth.



Switch on the kit.



Select the current transformer page.



As per the instruction given by the manual do the activities.



After entering primary and the secondary Current values and pressing the start button, the test cord

displays.



The Ratio will be calculated automatically by the kit.



Do the same procedure for the other phases.

Test Results:

R-Phase

CT

Injected Primary Current (A)

Expected Sec. Current (A)

Measured Sec.

Current (A) % Error

CT1 CORE-1 1S1-1S2

CORE-2 2S1-2S2

(21)

Y-Phase

CT

Measured Sec.

CT1 CORE-1 1S1-1S2

CORE-2 2S1-2S2

CT2 CORE-1 1S1-1S2

B-Phase

CT

Measured Sec.

CT1 CORE-1 1S1-1S2

CORE-2 2S1-2S2

CT2 CORE-1 1S1-1S2

Criteria: Accordance with CT specification.

Check List for Print out

1.CT Ratio and Polarity Test (For all Cores and Taps)

:

2.Knee point test ( for all cores and taps)

:

3.Winding resistance test (for all core & taps)

:

(22)

6.2. BUS SECTION

6.2.1. Name Plate Details

Description CT 1 – CORE-1 CT 2 – CORE-1 CT 2 – CORE-2

Make SCHNEIDER SCHNEIDER

Type RING RING

Installation INDOOR INDOOR

Highest System Voltage 12 kV 12 kV

Short Time Rating 40 kA for 3Sec 40 kA for 3Sec

Mfg.Year/S l.No:

R ph Y ph B ph

Ratio 3200/1A 3200/1A 3200/1A

Class PX 5P20/1.0 PX

Rated burden(VA) - 15 VA

-CT sec.resistance (Rct) at

75c in Ω 18Ω 18Ω 18Ω

Knee point voltage (Vk) in

V 563V - 563V

I mag at VK/2 in mA 8.8mA - 8.8mA

Mfg.Year/ Sl.No R ph Y ph B ph CT Sec Terminals R ph 1S1-1S2 1S1-1S2 2S1-2S2 Y ph 1S1-1S2 1S1-1S2 2S1-2S2 B ph 1S1-1S2 1S1-1S2 2S1-2S2

(23)

1. General visual inspection

:

2. Name plate details

:

3. HV Terminal Marking

:

4. LV Terminal Marking

:

5. Check for tightness of all CT terminals

:

6. Neutral earthing / Single point earthing

:

7. Position of P1-Towards BUS/FEEDER

:

8. Check CT Connection with ring type Lugs

:

9. Check CT wire as per the Schematic diagrams and tightness

:

6.2.2. Insulation Resistance Measurement:

Minimum Value: 1M/kV

Test Procedure



Check the Core to be measured



Say Typical X – Y(X is value to be checked, Y is against which value to be checked).



Connect X to - ve Terminal of Megger



Connect Y to + ve Terminal of Megger



Select the Voltage Rating of Megger



Operate the Megger and record Values

Test Results-

CT 1 CT

Designation

Description Applied Voltage

(DC) in V R-PH(GΩ) Y-PH(GΩ) B-PH(GΩ)

CT 1

Primary –Earth _{5000 V} Primary-Secondary(Core.1) 5000 V Secondary (Core.1)- Earth 500 V

(24)

CT Designation Description Applied Voltage (DC) in V R-PH(GΩ) Y-PH(GΩ) B-PH(GΩ) CT 2 Primary –Earth 5000 V Primary- Secondary (Core.1) 5000 V Primary- Secondary (Core.2) 5000 V Secondary (Core.1) -Earth 500 V Secondary (Core.2)-Earth 500 V Secondary(Core.1) &

Secondary(Core.2) 500 V

6.2.3. Polarity Test

(P1 towards (+) ve & P2 towards (-) ve

Test Procedure



Isolate primary/ secondary / Neutral earth.



Connect S1 to +ve and S2 to –ve in the meter.



Apply 1.5VDC instantaneously to Primary as shown in fig.



Monitor the +ve Deflection in the meter.

Test Results

CT Designation Core No Terminal R-PH Y-PH B-PH

CT1-1 CORE-1 1S1-1S2

(25)

6.2.4. CT Winding Resistance

Test Procedure



Isolate primary/ secondary / Neutral earth.



Switch on the kit



Select the current transformer page



As per instructions given by manual enter the test current(0.1A to 1.0A) and Pressing the start button,

the test card displays



The deviation of the measurement over time during the period of charging the winding



The Kit will automatically performers a discharging of winding after saving the measurement



Measures the DC Voltage



Measures the Resistance

Test Results

CT

Measured Resistance ( in ohms)

R-Ph Y-Ph B-Ph

At ambT At 75C At ambT At 75C At ambT At 75C CT1-1 CORE-1 1S1-1S2

CT2-1 CORE-1 1S1-1S2 CT2-2 CORE-2 2S1-2S2

Ambt Temperature :

ºC

Temperature at 75

C = Rt (1+0.00393(75-t))

Where,

75: Resistance at 75°C (Ω)

Rt : Resistance at ambient temperature (Ω)

t : Ambient temperature (°C)

(26)

6.2.5. Knee Point Voltage measurement

Ambt Temperature

:

ºC

Test Procedure



Do the connection as shown fig.



Isolate primary/ secondary / Neutral earth.



Switch on the kit



Select the current transformer page



The necessary wiring is only two leads from the voltage output to the open secondary wiring of the CT.



After entering the current and voltage limits and pressing the start button, the test card displays.



Carry out the test.



The knee point will be automatically calculated by the kit.



After test an automatic sequence of demagnetization is performed.



The test is done using a regulated voltage source.



Do the same for all other cores.

Test Results

CT

R-Ph Y-Ph B-Ph Vk (V) Imag (mA) Vk (V) Imag (mA) Vk (V) Imag ( mA) CT1-1 CORE-1 1S1-1S2 CT2-1 CORE-1 1S1-1S2 CT2-2 CORE-2 2S1-2S2

(27)

6.2.6. Ratio Test

Test Procedure



Do the connection as shown fig.



Isolate primary/secondary/neutral earth.



Switch on the kit.



Select the current transformer page.



As per the instruction given by the manual do the activities.



After entering primary and the secondary Current and pressing the start button, the test cord displays.



The Ratio will be calculated automatically by the kit.



Do the same procedure for the other phases.

Test Results

R-Phase

CT Designation Core No Terminal Injected Primary Current (A)

Measured Sec.

Y-Phase

Measured Sec.

B-Phase

Measured Sec.

(28)

Criteria: Accordance with CT specification.

Check List for Print out

1. CT Ratio and Polarity Test ( For all Cores and Taps )

:

2. Knee point test ( for all cores and taps)

:

3. Winding resistance test (for all core & taps)

:

Remark

6.3. Outgoing Feeders

Name Plate Details

Description (CT1) Core 1 (CT1) Core 2 (CT2) Core 1

Type RING

Highest System Voltage 12 kV

Short Time Rating 40 kA for 3Sec

Ratio 400 – 300 /1A 400 – 300 /1A 3200/1A

Class 5P20/1.0 PX PX

Rated burden(VA) 15 - 11.5 VA -

-CT sec. resistance (Rct) at

75c in Ω 2 - 1.5Ω 1.4 1.05Ω 18Ω

Knee point voltage (Vk)

in V - 425 - 320 563V

I mag at VK/2 in mA - ≤50-70mA 8.8mA

Mfg.Year/ Sl.No: R ph Y ph B ph CT Sec Terminals R ph 1S1-1S3 2S1-2S3 1S1-1S2 Y ph 1S1-1S3 2S1-2S3 1S1-1S2 B ph 1S1-1S3 2S1-2S3 1S1-1S2

(29)

6.3.1. General Checks

1. General visual inspection

:

2. Name plate details

:

3. HV Terminal Marking

:

4. LV Terminal Marking

:

5. Check for tightness of all CT terminals

:

6. Neutral earthing / Single point earthing

:

7. Position of P1-Towards BUS/FEEDER

:

8. Check CT Connection with ring type Lugs

:

9. Check CT wire as per the Schematic diagrams and tightness

:

6.3.2. Insulation Resistance Measurement:

Minimum Value: 1M/KV

Test Procedure



Check the Core to be measured



Say Typical X – Y(X is value to be checked, Y is against which value to be checked).



Connect X to - ve Terminal of Megger



Connect Y to + ve Terminal of Megger



Select the Voltage Rating of Megger



Operate the Megger and record Values

Test Results

(DC) in V R-PH(GΩ) Y-PH(GΩ) B-PH(GΩ) Primary –Earth 5000 V Primary- Secondary 1 5000 V Primary- Secondary 2 5000 V Secondary 1-Earth 500 V Secondary 2-Earth 500 V Secondary 1- Secondary 2 500 V

(30)

6.3.3. Polarity Test

(P1 towards (+) ve & P2 towards (-) ve

Test Procedure



Isolate primary/ secondary / Neutral earth.



Connect S1 to +ve and S2 to –ve in the meter.



Apply 1.5VDC instantaneously to Primary as shown in fig.



Monitor the +ve Deflection in the meter.

Test Results

CT

CT1 CORE-1 1S1-1S2 1S1-1S3 CORE-2 2S1-2S2 2S1-2S3 CT2 CORE-1 S1-S2

6.3.4. CT Winding Resistance

Test Procedure

(31)



Isolate primary/ secondary / Neutral earth.



Switch on the kit



Select the current transformer page



As per instructions given by manual enter the test current(0.1A to 1.0A) and Pressing the start button,

the test card displays



The deviation of the measurement over time during the period of charging the winding



The Kit will automatically performers a discharging of winding after saving the measurement



Measures the DC Voltage



Measures the Resistance

Test Results

CT

R-Ph Y-Ph B-Ph

CT1 CORE-1 1S1-1S2 1S1-1S3 CORE-2 2S1-2S2 2S1-2S3 CT2 CORE-1 1S1-1S2

Ambt Temperature :

ºC

Temperature at

75C

= Rt (1+0.00393(75-t))

Where,

75: Resistance at 75°C (Ω)

Rt : Resistance at ambient temperature (Ω)

t : Ambient temperature (°C)

Criteria: Resistance shall be less than specified CT specification.

6.3.5. Knee Point Voltage measurement

Ambt Temperature :

ºC

(32)



Do the connection as shown fig.



Isolate primary/ secondary / Neutral earth.



Switch on the kit



Select the current transformer page



The necessary wiring is only two leads from the voltage output to the open secondary wiring of the CT.



After entering the current and voltage limits and pressing the start button, the test card displays.



Carry out the test.



The knee point will be automatically calculated by the kit.



After test an automatic sequence of demagnetization is performed.



The test is done using a regulated voltage source.



Do the same for all other cores.

Test Results

CT Designation Core No Terminal

R-Ph Y-Ph B-Ph Vk (V) Imag (mA) Vk (V) Imag (mA) Vk (V) Imag ( mA) CT1 CORE-1 1S1-1S2 1S1-1S3 CORE-2 2S1-2S2 2S1-2S3 CT2 CORE-1 1S1-1S2

Criteria: Accordance with CT specification.

6.3.6. Ratio Test

Test Procedure



Do the connection as shown fig.



Isolate primary/secondary/neutral earth.



Switch on the kit.

(33)

Test Results

R-Phase

CT Designation Core Terminal Injected Primary Current in (A) Expected Sec.Current in (A) Measured Sec.Current in (A) % Error CT1 CORE-1 1S1-1S2 1S1-1S3 CORE-2 2S1-2S2 2S1-2S3 CT2 CORE-1 1S1-1S2

Y-Phase

CT Designation Core Terminal Injected Primary Current in (A)

Expected Sec. Current in (A)

Measured Sec.

Current in (A) % Error

B-Phase

Measured Sec.

Criteria: Accordance with CT specification.

Check List for Print out

1. CT Ratio and Polarity Test(For All Cores and Taps)

:

2. Knee point test ( for all cores and taps)

:

3. Winding resistance test (for all core & taps)

:

(34)

6.4. Station Transformer Feeders

Name Plate Details

Description (CT1) CORE-1 (CT1) CORE-2 (CT2) CORE-1

Type RING

Short Time Rating 40kA for 3Sec

Ratio 150/1A 150/1A 3200/1A

Class 5P20/1.0 5P20/1.0 PX

Rated burden(VA) 15VA 15VA

-CT sec. resistance (Rct) at

75c in Ω 3Ω 3Ω 18Ω

Knee point voltage (Vk) in

V - - 563 I mag at VK/2 in mA - - 8.8mA Mfg.Year/S l.No: R ph Y ph B ph CT Sec Terminals R ph 1S1-1S2 2S1-2S2 S1-S2 Y ph 1S1-1S2 2S1-2S2 S1-S2 B ph 1S1-1S2 2S1-2S2 S1-S2

Function OC+E/F BCU+ METERING B/B PROT (87B)

6.4.1. General Checks

1. General visual inspection

:

2. Name plate details

:

3. HV Terminal Marking

:

4. LV Terminal Marking

:

5. Check for tightness of all CT terminals

:

6. Neutral earthing / Single point earthing

:

(35)

6.4.2. Insulation Resistance Measurement:

Minimum Value: 1M/KV

Ambt Temperature

:

ºC

Test Procedure



Check the Core to be measured



Say Typical X – Y(X is value to be checked, Y is against which value to be checked).



Connect X to - ve Terminal of Megger



Connect Y to + ve Terminal of Megger



Select the Voltage Rating of Megger



Operate the Megger and record Values

Test Results

(DC) in V R-PH(GΩ) Y-PH(GΩ) B-PH(GΩ) Primary –Earth 5000 V Primary- Secondary 1 5000 V Primary- Secondary 2 5000 V Secondary 1-Earth 500 V Secondary 2-Earth 500 V Secondary 1- Secondary 2 500 V

(36)

6.4.3. Polarity Test

(P1 towards (+) ve & P2 towards (-) ve

Test Procedure



Isolate primary/ secondary / Neutral earth.



Connect S1 to +ve and S2 to –ve in the meter.



Apply 1.5VDC instantaneously to Primary as shown in fig.



Monitor the +ve Deflection in the meter.

Test Results

CT

CT1 CORE-1 1S1-1S2

CORE-2 2S1-2S2

(37)

6.4.4. CT Winding Resistance

Test Procedure



Isolate primary/ secondary / Neutral earth.



Switch on the kit



Select the current transformer page



As per instructions given by manual enter the test current(0.1A to 1.0A) and Pressing the start button,

the test card displays



The deviation of the measurement over time during the period of charging the winding



The Kit will automatically performers a discharging of winding after saving the measurement



Measures the DC Voltage



Measures the Resistance

Test Results

CT

R-Ph Y-Ph B-Ph

CT1 CORE-1 1S1-1S2

CORE-2 2S1-2S2

CT2 CORE-1 1S1-1S2

Ambt Temperature :

ºC

Temperature at

75C

= Rt (1+0.00393(75-t))

Where,

75: Resistance at 75°C (Ω)

Rt : Resistance at ambient temperature (Ω)

t : Ambient temperature (°C)

(38)

6.4.5. Knee Point Voltage measurement

Ambt Temperature :

ºC

Test Procedure



Do the connection as shown fig.



Isolate primary/ secondary / Neutral earth.



Switch on the kit



Select the current transformer page



The necessary wiring is only two leads from the voltage output to the open secondary wiring of the CT.



After entering the current and voltage limits and pressing the start button, the test card displays.



Carry out the test.



The knee point will be automatically calculated by the kit.



After test an automatic sequence of demagnetization is performed.



The test is done using a regulated voltage source.



Do the same for all other cores.

Test Results

CT Designation Core No Terminal

R-Ph Y-Ph B-Ph Vk (V) Imag (mA) Vk (V) Imag (mA) Vk (V) Imag ( mA) CT1 CORE-1 1S1-1S2 CORE-2 2S1-2S2 CT2 CORE-1 1S1-1S2

(39)

6.4.6. Ratio Test

Test Procedure



Do the connection as shown fig.



Isolate primary/secondary/neutral earth.



Switch on the kit.



Select the current transformer page.



As per the instruction given by the manual do the activities.



After entering primary and the secondary Current and pressing the start button, the test cord displays.



The Ratio will be calculated automatically by the kit.



Do the same procedure for the other phases.

Test Results

R-Phase

Measured Sec.

CT1

CORE-1 1S1-1S2 CORE-2 2S1-2S2

CT2 CORE-1 1S1-1S2

Y-Phase

Measured Sec.

CT1 CORE-1 1S1-1S2

CORE-2 2S1-2S2

(40)

B-Phase

Measured Sec.

CT1 CORE-1 1S1-1S2

CORE-2 2S1-2S2

CT2 CORE-1 1S1-1S2

Criteria: Accordance with CT specification.

Check List for Print out

1. CT Ratio and Polarity Test(For All Cores and Taps)

:

2. Knee point test ( for all cores and taps)

:

3. Winding resistance test (for all core & taps)

:

(41)

7. VOLTAGE TRANSFORMER TEST

7.1. Incomer Feeder

Name Plate Details

Description CORE 1

Type VBF12

Insulation Level Ratio 11kV/√3 :110V/√3 Class 3P/1.0 Burden(VA) 50 VA Mfg.Year/Sl.No: R ph Y ph B ph

Function BCU + AVR + MET. + SYNC

7.1.1. General Checks

1. General visual inspection

:

2. Name plate details

:

3. HV Terminal Marking

:

4. LV Terminal Marking

:

5. Check for tightness of all VT terminals

:

6. VT Primary and Secondary neutral earth check

:

7. Fuse rating

:

8. MCB rating

:

(42)

7.1.2. Insulation Resistance Measurement:

Minimum Value: 1M/kV

Ambt Temperature

:

ºC

Test Procedure



Check the Core to be measured



Say Typical X – Y(X is value to be checked, Y is against which value to be checked).



Connect X to - ve Terminal of Megger



Connect Y to + ve Terminal of Megger



Select the Voltage Rating of Megger



Operate the Megger and record Values

Test Results

(DC)in V R-PH(GΩ) Y-PH(GΩ) B-PH(GΩ) Primary –Earth 5000 V Primary- Secondary 1 5000 V Secondary 1-Earth 500 V

7.1.3. Polarity Test

Test Procedure



Isolate primary/ secondary / Neutral earth.



Connect ‘a’ to +ve and ‘n’ to –ve in the meter.



Apply 1.5VDC instantaneously to Primary as shown in fig.



Monitor the +ve Deflection in the meter.

(43)

*Denotes respective phase .i.e (1r-1nr), (1y-1ny), (1b-1nb)

7.1.4. VT Winding Resistance

Test Procedure



Isolate primary/ secondary / Neutral earth.



Switch on the kit



Select the voltage transformer page



As per instructions given by manual enter the test current and Pressing the start button, the test card

displays



The deviation of the measurement over time during the period of charging the winding



The Kit will automatically performers a discharging of winding after saving the measurement



Measures the DC Voltage



Measures the Resistance

Test Results

VT

Designation Core Terminal

R-PH Y-PH B-PH

HV R* - N*

LV

1r* - 1nr* 2r* - 2nr* 3r* - 3nr*

*Denotes respective phase.i.e (R-N), (Y-N), (B-N), (1r-1nr), (1y-1ny),(1b-1nb) (2r-2nr),

(2y-2ny),(2b-2nb) & (3r-3nr),(3y-3ny),(3b-3nb)

Ambt Temperature:

C

Temperature at

75C

= Rt (1+0.00393(75-t))

Where,

75: Resistance at 75°C (Ω)

Rt: Resistance at ambient temperature (Ω)

t: Ambient temperature (°C)

(44)

7.1.5. Ratio Test

Test Procedure



Do the connection as shown fig.



Switch on the kit.



Select the voltage transformer page.



As per the instruction given by the manual do the activities.



After entering primary and the secondary voltage and pressing the start button, the test cord displays.



The Ratio will be calculated automatically by the kit.



Do the same procedure for the other phases.

Test Results

VT Designation Phase Terminal Applied Primary Voltage in (V) Calc Sec. Voltage in (V) Measured Sec. Voltage in (V) % Error VT R 1r - 1nr Y 1y - 1ny B 1b - 1nb

Criteria: Accordance with VT specification.

Check List for Print out

1.VT ratio and polarity test

:

2. VT secondary winding resistance

:

(45)

7.2. Capacitor, Station Transformer, Outgoing Feeders

Name Plate Details

Description Core 1

Type VBF12

Insulation Level Mfg. Year/Sl.No: R ph Y ph B ph Ratio 11kV/√3 : 110V/√3 Class 3P/1.0 Burden(VA) 50 VA

Function BCU + MET. + SYNC.

7.3. Bus VT

Description Core 1

Make SCHNEITER

Type VBF12

Insulation Level Mfg.Year/Sl.No: R ph Y ph B ph Ratio 11kV/√3 : 110V/√3 Class 3P/1.0 Burden(VA) 50 VA

(46)

7.2.1. General Checks

1.General visual inspection

:

2.Name plate details

:

3.HV Terminal Marking

:

4.LV Terminal Marking

:

5.Check for tightness of all VT terminals

:

6.Fuse rating

:

7.MCB rating

:

8.Equipment Grounding System

:

9.

VT Primary and Secondary neutral earth check

:

10. VT truck rack IN/OUT check

:

7.2.2. Insulation Resistance Measurement:

Minimum Value: 1M/kV

Ambt Temperature

:

ºC

Test Procedure



Check the Core to be measured



Say Typical X – Y(X is value to be checked, Y is against which value to be checked).



Connect X to - ve Terminal of Megger



Connect Y to + ve Terminal of Megger



Select the Voltage Rating of Megger



Operate the Megger and record Values

Test Results

Description

Applied Voltage

(DC) in V

R-PH(GΩ)

Y-PH(GΩ)

B-PH(GΩ)

Primary –Earth

5000 V

Primary- Secondary

5000 V

(47)

7.2.3. Polarity Test

Test Procedure



Isolate primary/ secondary / Neutral earth.



Connect ‘a’ to +ve and ‘n’ to –ve in the meter.



Apply 1.5VDC instantaneously to Primary as shown in fig.



Monitor the +ve Deflection in the meter.



If the deflection is not enough to confirm, reverse the connection (meter shall be connected to

Primary side and DC voltage shall be applied on secondary side) and try again.

Test Results

VT Designation

Core No

Terminal

R-Ph

Y-Ph

B-Ph

VT

CORE -1

1r* - 1nr*

(48)

7.2.4. VT Winding Resistance

Test Procedure



Isolate primary/ secondary / Neutral earth.



Switch on the kit



Select the voltage transformer page



As per instructions given by manual enter the test current and Pressing the start button, the test card

displays



The deviation of the measurement over time during the period of charging the winding



The Kit will automatically performers a discharging of winding after saving the measurement



Measures the DC Voltage



Measures the Resistance

Test Results

VT Designation Core Terminal

R-PH Y-PH B-PH

VT 1 1r* - 1nr*

*Denotes respective phase .i.e (1r-1nr),(1y-1ny),(1b-1nb)

Ambient Temperature:

C

Temperature at

75C

= Rt (1+0.00393(75-t))

Where,

75 : Resistance at 75°C (Ω)

Rt : Resistance at ambient temperature (Ω)

t : Ambient temperature (°C)

(49)

7.2.5. Ratio Test

Test Procedure



Do the connection as shown fig.



Switch on the kit.



Select the voltage transformer page.



As per the instruction given by the manual do the activities.



After entering primary and the secondary voltage and pressing the start button, the test cord displays.



The Ratio will be calculated automatically by the kit.



Do the same procedure for the other phases.

Test Results

VT

Designation Phase Terminal

Applied Primary Voltage in (V) Calculated Sec. Voltage in (V) Measured Sec. Voltage in (V) % Error R 1r - 1nr Y 1y - 1ny B 1b - 1nb

Criteria: Accordance with VT specification.

Check List for Print out

1. VT ratio and polarity test

:

2. VT secondary winding resistance

:

(50)

8. METER CALIBRATION TEST

8.1. Ammeter with Selector Switch

8.1.1. Name Plate Details

Device Ref

:

Make

:

Sl. No.

:

Full Scale Reading

:

CT Ratio

:

Accuracy Class

:

8.1.2. Secondary Injection Test

Injected Secondary Current

in (A) Measured Current in (A) Expected Current in (A) % Error

Allowable Error Range: As per the Ammeter Class

Ammeter Found Healthy

:

YES / NO

(51)

8.2. Volt Meter with Selector Switch:

8.2.1. Name Plate Details

Device Ref

:

Make

:

Sl. No.

:

Full Scale Reading

:

CT Ratio

:

Accuracy Class

:

8.2.2. Secondary Injection Test

Injected Secondary

voltage in V

Measured Voltmeter Reading in (kV)

Expected Voltmeter Reading

in (kV) % Error

Allowable Error Range: As per the Voltmeter Class

Volt meter Found Healthy

:

YES / NO

(52)

9.11kV CT SECONDARY INJECTION TEST

9.1. Incomer Feeder

9.1.1 Name Plate Details:

Description (CT1) CORE-1 (CT1) CORE-2 (CT2) CORE-1

Type RING

Highest system voltage 12 kV

Short time rating 40 kA for 3Sec

Ratio 2500/1A 2500/1A 3200/1A

Class PX 5P20/1.0 PX

Rated burden(VA) - 15VA

-CT sec. resistance (Rct) at 75c

in Ω <8.75 <14 <18

Knee point voltage (Vk) in V ≥230 - 563

I mag at VK/2 in mA ≤30 - 8.8mA Mfg. Year/Sl.No R ph Y ph B ph CT Sec Terminals R ph 1S1-1S2 2S1-2S2 S1-S2 Y ph 1S1-1S2 2S1-2S2 S1-S2 B ph 1S1-1S2 2S1-2S2 S1-S2

Function MAIN TRF DIFF(87T) +

REF

Directional O/C Protection

(53)

9.1.2. A18

CT1- Core-1, Diff Protection (87T) + REF (87NI).

Ratio : 2500/1A

Inject R- PH – 0.6 A, Y- PH – 0. 8A, B- PH – 1.0A at A,

SWGR Terminals X11-612, 615, 618 & 613 and

measure the Current in the following terminals.

Secondary Current In mA measured at SWGR Panel A18

TB Terminal X11

Relay Panel +B11 RP CT Terminal X650

Relay Panel +B11 .RP Test Block –S871.B Test Position

R Y B N R Y B N R Y B N

612 615 618 613 1 3 5 7 21 23 25 27

Relay Panel +B11 .RP Test Block –S871.B Service Position

Relay Panel +B11 RP Relay 87T Main - 7UT613

22 24 26 28 22 24 26 28 R1 R3 R5

-Relay Panel +B11 RP Display Pri. Current at Relay87T

Main-7UT613

Relay Panel +B11 RP

Display Sec. Current at Relay87T Main-7UT613

IL1 IL2 IL3 - IL1 IL2 IL3 - 2 4 6 8

Relay Panel +B11 .RP Test Block –S871.B Service Position

Relay Panel +B11 .RP TB Terminal X650

(54)

Relay Panel +A18 .RP TB Terminal X610

Relay Panel +A18 .RP Test Block – S871 Test Position

Relay Panel +A18 .RP Test Block –S871 Test Position

5 6 7 8 21 23 25 27 22 24 26 28

Relay Panel+A18 .RP Test Block – S871 Service Position

Relay Panel+A18 .RP-Relay (87NL/51) P141

Relay Panel +A18 .RP- Display Pri. Current at Relay (87NL/51) P141

22 24 26 28 Q1/Q2 Q3/Q4 Q5/Q6 Q7/Q8 IL1 IL2 IL3 3I0

Relay Panel+A18 .RP-Display Sec. Current At Relay

(87NL/51) P141 Relay Panel +A18 .RP-B1 Metrosil Relay Panel +A18 .RP-R102 Resistor Relay Panel +A18 .RP – S871 Test Position Relay Panel +A18 .RP –S871 Test Position R Y B N N N N N N N N N

IL1 IL2 IL3 3I0 1 2 1 2 1 3 2 4

Relay Panel+A18 .RP Test Block –S871 Service Position

Relay Panel +A18 .RP-Relay 87NL P141

Relay Panel +A18 .RP-Display Pri. at RELAY 87NL P141

Relay Panel+18A .RP- Display Sec. at Relay 87NL P141

N N N

3I0 3I0

(55)

9.1.3. A18

CT1- CORE-2, AVR+DIR OC+BCU+AMMETER

Ratio : 2500/1A

Inject R- PH – 0.6 A, Y- PH – 0.8A, B- PH – 1.0A at A

SWGR Terminals X11 – 622, 625, 628 & 623

and measure the current in the following terminals.

Secondary current in mA measured at SWGR Panel +A18 TB Terminal -X11 Relay Panel+A18 .RP TB Terminal–

X620 Relay Panel+A18 .RP TB Terminal–X620 AVR Panel TB Terminal –X620 R Y B N R Y B N B B B B 622 625 628 623 1 3 5 7 10 13 1 4

AVR Panel -A1 TAPCON 260 Relay

Terminal-M1

AVR Panel -A1 TAPCON 260 Relay Display Pri

AVR Panel -A1 TAPCON 260 Relay Display Sec

- Relay Panel+A18 .RP – Test Block –S671.A Test Position

B B B B B B - - R Y B N

5 9 I I - - 21 23 25 27

-

-Relay Panel+A18 .RP – Test Block –S671.A Test Position

Relay Panel+A18 .RP – Test Block –S671.A Service Position

Relay panel +A18 .RP – Relay (67/67N/51/50BF) P141

22 24 26 28 22 24 26 28 Q1/Q2 Q3/Q4 Q5/Q6 Q7/Q8

Relay panel +A18 .RP – Relay Display Pri at (67/67N/51/50BF)

P141

Relay panel +A18 .RP – Relay Display Sec at (67/67N/51/50BF)

P141

Relay Panel+A18 .RP – Test Block –S671.A Test Position

IL1 IL2 IL3 IE IL1 IL2 IL3 IE 2 4 6 8

Relay Panel+A18 .RP – Test Block –S671.A Test Position

Relay Panel+A18 .RP – Test Block –S671.A Service Position

Relay Panel+A18 .RP Test Block –S201 Test Position

(56)

Relay Panel+A18 .RP Test Block –S201 Test Position

Relay Panel+A18 .RP Test Block –S201 Service Position

Relay Panel+A18 .RP A201 BCU 7SJ647

22 24 26 28 22 24 26 28 Q1/Q2 Q3/Q4 Q5/Q6 Q7/Q8

Relay Panel+A18 .RP - Display Pri. at BCU 7SJ647

Relay Panel+A18 .RP - Display Sec. at BCU 7SJ647

Relay Panel +A18 .RP TB Terminal –X620

IL1 IL2 IL3 IE IL1 IL2 IL3 IE R Y B N

10 11 12 13 SWGR Panel+A18 TB Terminal- X11 SWGR Panel+A18 Selector Switch (-S401) SWGR Panel +A18 Ammeter (-P401) R Y B N R Y B N R-ph Y-ph B-ph -661 663 665 667 2 6 10 1

-9.1.4. A

CT2- CORE-1, BB PROTN.

Ratio: 3200/1A

Inject R- PH – 0.6 A, Y- PH – 0.8A, B- PH – 1.0A at A

SWGR Terminals X11 – 634, 637, 640 &

633 and measure the current in the following terminals.

Secondary current in mA measured at SWGR Panel A18 TB Terminal – X11 Bb Relay Panel +BB .RP1 TB Terminal-X610 BB Relay Panel +BB .RP1 R103,R104,R105(Resistor) R Y B N R Y B N R Y B N 634 637 640 633 52 53 54 2 1,2 1,2 1,2 --BB Relay Panel +--BB .RP1 –

Test Block –S87Z1 Test Position

BB Relay Panel +BB .RP1 – Test Block –S87Z1 Test Position

BB Relay Panel +BB .RP1 – Test Block –S87Z1 Service Position

21 23 25 27 22 24 26 28 22 24 26 28

BB Relay Panel +BB .RP-Relay F87Z1 BBP 7SJ611

BB Relay Panel +BB .RP-Relay Display Pri.F87Z1 BBP 7SJ611

BB Relay Panel +BB .RP-Relay Display Sec.F87Z1 BBP 7SJ611