p740 bb protection test report rev 1

1

Gulf Cooperation Council

Interconnection Authority

GCCIATRANSMISSION & DISTRIBUTION

Engineer

GCC Interconnection Project - Phase I

P740Site Acceptance Test Report

LOW IMPEDANCE BB PROETCTIONBay Ref:Substation:

SUMMARYREVISION

PAGE01

1PURPOSE OF TESTS2X

2REFERENCE DOCUMENT2X

3SCOPE2X

4RELAY TERMINLOGY 2X

5TEST EQUIPMENT3X

6PRE-REQUISTES3X

7PROCEDURES3X

8RECORD TEST SHEET6X

8.1 TOPOLOGY

8.2 BB PROTECTION DETAILS

8.3 RELAY ASSIGNMENTS

8.4 SYSTEM DATA

8.5 SETTINGS

8.6 CT PARAMETER

8.7 BB PROTECTION TEST

1 PURPOSE OF TESTSThe purpose of the tests is to check the full functionality of the protection relay and the complete scheme related.This procedure does not intend to check that all alarms and trips are correctly sent to the DCS or SCADA level. This part is already developed into dedicated DCS or SCADA Commissioning procedures.

2 REFERENCE DOCUMENTS

DOCUMENTDOCUMENT REFERENCEVERSION/ DATEREMARKS

Protection Line Diagram

Schematic Drawing

Service Manual

Operation Manual

3 SCOPE

Substation Name :-

Diameter:

Bay :

Panel Number :

Relay Denomination in Scheme

Scheme to be Checked

4 TERMINOLOGYCode ( ANSI) Terminology

87B1Low Impedance Busbar Protection

5 TEST EQUIPMENT USED

Sl NoDescriptionMakeEquipment

Sl No.Calibration dateCalibration due date

1.Secondary Injection Kit

2.Multimeter

3.LaptopNA

6. PRE - REQUISITES

PRE-REQUISITESREMARKS

All Safety Condition Are Ok

All Competent Personnel Available For The Test

AC & DC Supply Availability And Security

PPE Safety Available.

All Other Relevant Safety Instructions Been Followed

Coordination With Other Parties ( GIS, Transformer, Etc..)

7. TEST PROCEDURES

The following procedures are written for demonstrating the main protection functions of the P740 relay using an Omicron test set or similar. This document is to be referred to when performing commissioning tests in association with the commissioning section of the service manual.

7.1 ID>1 threshold (circuitry fault current) :

The ID>1 threshold is a CUs parameter, this setting is:

ID>1 = A

tID>1= s

For simplify the test put K ID>1 = 0%

For the search of the current threshold the ID>1 alarm timer is set at the minimum value (100ms).With the OMICRON CMC 156, applied a current on I1 of each PU and increase the current by step of 0,01 A until appear the circuitry fault alarm. (Output relay 3 of CU circuitry fault)

Repeat this sequence for the phase I2 and I3.

The ID>1 alarm timer is checked for each PU after the measurement of the current threshold, the setting of the ID>1 alarm timer is set at the original value. (5 Sec)

The time delay is measured for a differential current upper than ID>1,the start of the clock is when the current is applied and the stop of the clock is when the circuitry fault alarm appeared.

7.2 ID>2 threshold (tripping current):

The ID>2 threshold is a CUs parameter, this setting is:

ID>2 = IDCZ>2 =

K2 = KCZ =

The tripping time is less of one cycle ( on phase I1 of one PU

I2 => on phase I1 of another PU

1. Fixed a bias current > Ibias0

2. Increase the differential current until the busbar trip, by 2 opposite ramps of current on I1 and I2 with the same speed so that the bias current is always constant.The trip of the busbar differential protection appeared when the two conditions are respected:

1. Idiff > ( K2 * Ibias = KCZ * Ibais )

2. Idiff > ( ID>2 = IDCZ>2 )

3. Idiff > K x Ibias

4. Idiff > Id>2

I Bias = I1 + I 2

I Diff = I1 I 2

Slope K = I Diff operated / I Bias

7.4 Dead Zone threshold and Timing Test :

The I>DZ threshold is a PUs parameter, this setting is:

I> DZ =

DZ Time =

With the OMICRON CMC 156, applied a current on I1 of each PU and increase the current by step of 0,01 A until the trip of the PU (output relay N 1, 2 or 3). The CMC 156 is programmed to stop when the tripping relay switch on.Repeat this sequence for the phase I2 and I3.

The tDZ timer is checked for each PU after the measurement of the current threshold, the setting of the tDZ alarm timer is set at the original value. ( Sec)

The time delay is measured for a differential current upper than I>DZ,the start of the clock is when the current is applied and the stop of the clock is when the circuitry fault alarm appeared.

8.1- TOPOLOGY:-

8.2- BB Protection Details:

8.2.1- Central Unit:Quantity1

Model NumberSerial NumberAddressSoft issue

8.2.2 Peripheral Unit:

Quantity5

Model NumberSerial NumberAddressSoft issuefeeder

8.4 Relay Assignments :8.4.1 P741 logic I/O assignment

Opto N#P741

TERMINAL N#AssignmentTest

1K1-K2SPARE

2K3-K4SPARE

3K5-K6SPARE

4K7-K8SPARE

5K9-K10SPARE

6K11-K12SPARE

7K13-K14SPARE

8K15-K16SPARE

Relay N#P741

TERMINAL N#AssignmentTest

1J1-J2SPARE

2J3-J4SPARE

3J5-J6SPARE

4J7-J8SPARE

5J9-J10SPARE

6J11-J12SPARE

7J13-J15 (R)SPARE

J14-J15 (T)

8J16-J18 (R)SPARE

J17-J18 (T)

Led N#ColorAssignmentTest

1Red87BB Fault Phase A

YellowSPARE

GreenSPARE

2Red87BB Fault Phase B

YellowSPARE

GreenSPARE

3Red87BB Fault Phase C

YellowSPARE

GreenSPARE

4Red87BB Trip Zone 1

YellowSPARE

GreenSPARE

5RedCircuitry faulty Zone 1

YellowSPARE

GreenSPARE

6RedZone 1 Blocked

YellowZone 1 Checked

GreenZone 1 Protected

7RedFiber Comm. Error

YellowFiber Comm. Change

GreenFiber Comm. OK

8RedSPARE

YellowSPARE

GreenSPARE

8.3.2 P742 logic I/O assignment( P742@7,8,9,10,11)

Opto N#P742 terminal N#AssignmentTest

1C1-C2SPARE

2C3-C4SPARE

3C5-C650BF INT ( Ext 3 Ph Trip )

4C7-C8SPARE

5C-9C10SPARE

6C11-C12SPARE

7C13-C143 ph CB Open

8C15-C163 ph CB Closed

9A1-A2SPARE

10A3-A4SPARE

11A5-A6SPARE

12A7-A8SPARE

13A9-A10SPARE

14A11-A12SPARE

15A13-A14SPARE

16A15-A16SPARE

Relay N#P742 terminal N#AssignmentTest

1D1-D2BB PROTECTION TRIP

2D3-D4SPARE

3D5-D6SPARE

4D7-D8SPARE

5D9-D10SPARE

6D11-D12SPARE

7D13-D15 (R)SPARE

D14-D15 (T)

8D16-D18 (R)SPARE

D17-D18 (T)

WDE11-E12 (R)RELAY FAULTY (WATCHDOG CONTACT)

E12-E13(T)

Led N#AssignmentTest

1CB OPEN

2CB CLOSED

3CB STATUS ALARM

4DEAD ZONE FAULT

587BB TRIP

6FIBER COMM ERROR

7EXT CBF INITATION

8SPARE

8.4 System Data :

8.4.1 CT Data:-

feederTYPEMakeRatioClassKSCCVkImagBurden

8.4.2 Network Data:-

Network currentValue Feeder name

Independent bar

Icc min

Iload max

Iload min

I bias max (1Bar)

Biggest PW

8.5 Settings :8.5.1 CU setting:-

Differential phase fault: ActivedKCZ =%

IDCZ>2 =A

K2 =%

ID>2 =A

ID>1 =A

K1 =%

ID>1 Timer =Sec

Differential earth fault: not actived8.5.2. PUSetting:

Dead Zone Protection: Actived I>DZ =A

I>DZ Time = Sec

8.6 CT parameters:

Measurement of loop resistance:

The CT secondary are wired like following schematic:

PUsBURDEN RESISTANCECT SECONDARY RESISTANCE

RanRbnRcnRabRARBRC

PUsRatio Class RBph / RBNStandard inputRated burdenKSCC or VkRCTEff burden

Eff. burden: Its the highest of the 3 loop resistances Rba, RBb and RBc, multiplied by 1.25 for taking into account the high temperature.

RBph / RBn: Its the ratio between the highest of the 3 loop resistances Rba, RBb and RBc and the loop resistance Rab.

RCT: Its the highest of the 3 secondary resistances of the CT.

Relay Characteristics:

8.7. BB Protection Tests:

8.7.1 Measurements:

Injected secondary current = 1A

PUsCT ratioCurrent measured by the relay

IRIYIB

8.7.2 Checking of 87BB current threshold:

8.7.2.1. ID>1 threshold (circuitry fault current) :

PUsCT ratioCurrent measuredTime delay

Sec

I1I2I3

8.7.3 ID>2 threshold (tripping current):

PUsCT ratioID>2 , IDCZ>2 and tripping time measured

I1

In ATrip. Time

In (ms)I2

In ATrip. Time

In (ms)I3

In ATrip. Time

In (ms)

8.7.3 Slope Test :

PhasePU@7-Q01PU@8-Q02BAISDIFFERENTIALSLOPE

CT Ratio2000/12000/1

PH-R

PH-Y

PH-B


CT Ratio2000/12000/1

PH-R

PH-Y

PH-B


CT Ratio2000/12000/1

PH-R

PH-Y

PH-B


CT Ratio2000/12000/1

PH-R

PH-Y

PH-B


CT Ratio2000/12000/1

PH-R

PH-Y

PH-B

8.7.3 Topology Test :

Case 1:-

CircuitPU Add.CB StatusFault Loc.TRIPNO TRIP

Q017HERE

Q028

Q039

Q0410

Q0511

C = Close, O = Open, Y = Yes, N = No

Case 2:-


Q017

Q028HERE

Q039

Q0410

Q0511


Case 3:-


Q017

Q028

Q039HERE

Q0410

Q0511

C = Close, O = Open, Y = Yes, N = NoCase 4:-CircuitPU Add.CB StatusFault Loc.TRIPNO TRIP

Q017

Q028

Q039

Q0410HERE

Q0511


Case 5:-


Q017

Q028

Q039

Q0410

Q0511HERE


8.7.3 Dead Zone Fault :

PUsCT ratioCurrent measuredTime delay

Sec

I1I2I3

8.8 FINAL CHECKS

Item

Description Result

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

2Disturbed customer wiring re-checked?

3All commissioning tests disabled?

4Circuit breaker operations counter reset?

5Current counters reset?

6Event records reset?

7Fault records reset?

8Disturbance records reset?

9Alarms reset?

10LEDs reset?

11Secondary front cover replaced? (If applicable)

REMARKS

END OF REPORT

s> ID>1 than the current ).merPoint A

Idiff ID>1

Idiff K1*Ibais

s> ID>1 than the current ).merPoint B

Idiff KCZ*Ibais

Idiff IDCZ>2

Idiff K2*Ibais

Idiff ID>2

s> ID>1 than the current ).merPoint C

I Diff

K2 = KCZ

ID>2 = IDCZ>2

K1

ID>1

Ibias = A

I Bias

IDCZ>2

=

ID>2

Ibias =

KCZ

K2

AREVA T&DGCCIA / SNCL

SignatureSignature

NameName

DateDate

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p740 bb protection test report rev 1

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