p 632 cvpl transformer setting

EXCEL POWER SWITCHGEAR

NO.39, ACHUTHAN FIRSTCROSS, EKKADUTHANGAL

CHENNAI - 600 032. Date: 22/01/2011

11KV / 6.9KV, 10MVA TRANSFORMER DIFFERENTIAL PROTECTION

:0.2

: 0.2Iref

RECOMMENDED SETTINGS FOR DIFFERENTIAL PROTECTION:

m1

TRANSFORMER DETAILS

LV SIDE CT RATIO

% IMPEDANCE

VECTOR GROUP

TAP CHANGER

POWER

HV SIDE VOLTAGE

HV SIDE CT RATIO

LV SIDE VOLTAGE

: 11KV

: 10MVA

: DYN11

: +5% T0 -5%

: 1000/1A

TRANSFOMER DIFFERENTIAL PROTECTION

AREVA MICOM P632

: 8.35%

: 6.9KV

: 600/1A

Idiff >

THE TRANSFORMER DIFFERENTIAL PROTECTION RELAY MICOM P632 HAS THE

FOLLOWING PARAMETER FOR SETTING

1. PICK UP VALUE OF DIFFERENTIAL CURRENT Idiff > ( OPERATE VALUE OF THE

DIFFERENTIAL PROTECTION FUNCTION AS REFERRED TO THE REFERENCE CURRENT OF

THE RELEVANCE TRANSFORMER END )

2. SLOPE 1 OF TRIPPING CHARACTERISTICS, m1 ( GRADIENT OF THE TRIPPING

CHARACTERISTICS OF DIFFERENTIAL PROTECTION IN THE RANGE )

3. SLOPE 2 OF TRIPPING CHARACTERISTICS, m2 ( GRADIENT OF THE TRIPPING

CHARACTERISTICS OF DIFFERENTIAL PROTECTION IN THE RANGE )

4. BASE POINT FOR SLOPE 2 CHARACTERISTICS, IR, m2 ( THIS SETTING DEFINES THE

SECOND KNEEOF THE TRIPPING CHARACTERISTICS ABOVE THE KNEE, THIS GRADIENT IS

m2 )

5. THRESHOLD VALUE OF THE DIFFERENTIAL CURRENT FOR THE DEACTIVATION OF THE

INRUSH STABILIZATION FUNCTION ( HARMONIC RESTRAINT ) AND OF THE OVER FLUXING

RESTRAINT, Idiff>>. ( IF THE THRESHOLD IS SET TOO HIGH, IT IS POSSIBLE FOR THE P632

6. THRESHOLD VALUE OF THE DIFFERENTIAL CURRENT FOR TRIPPING BY THE

DIFFERENTIAL CURRENT FOR TRIPPING BY THE DIFFERENTIAL PROTECTION FUNCTION

INDEPENDENT OF RESTRAINING VARIABLES, HARMONIC RESTRAINT, OVER FLUXING

m2

Idiff>>

Idiff>>> :10.0Iref

:8.0Iref

:1.5IrefIR, m2

:0.8

WEBSITE : www.excelpower.in

E-Mail - [email protected] [email protected]

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CHENNAI - 600 032. Date: 22/01/2011

= 1.0488-1

=0.0488AHENCE THE DIFFERENTIAL CURRENT

BIAS CURRENT=(I1 + I2)/2

=(1.0488+1)/2

=1.0244A

=0.920

=0.920*1.14

=1.0488A

WITH THE RATIO CORRECTION THE CURRENT AT THE

RELAY BIAS TERMINAL

= 10MVA/(1.732*10.45KV)

= 552.5AFULL LOAD PRIMARY CURRENT

(WILL BE CALCULATED BY THE RELAY)

AT -5% TAP CONDITION CURRENT IN HV BIAS CIRCUIT (WINDING a )

-5% OF 11KV = 10.45KV

= 0.83676AEQUIVALENT CURRENT IN CT SECONDARY

(WILL BE CALCULATED BY THE RELAY)

REQUIRED RATIO COMPENSATION =1.195

=1/ 0.83676A

FULL LOAD PRIMARY CURRENT = 10MVA/ (1.732 * 6.9KV)

= 836.76A

= 836.76A*1/1000

AT NORMAL CONDITION CURRENT IN LV BIAS CIRCUIT ( WINDING b )

(1.14 WILL BE CALCULATED BY THE RELAY)

EQUIVALENT CURRENT IN CT SECONDARY (600/1A)

( 0.874A WILL BE CALCULATED BY THE RELAY)

REQUIRED RATIO COMPENSATION

= 524.88/600=0.874A

= 1/0.874=1.14

AT NORMAL CONDITION CURRENT IN HV BIAS CIRCUIT ( WINDING a )

FULL LOAD PRIMARY CURRENT = 10MVA/ (1.732 * 11KV)

= 524.88A

CALCULATION TO VERIFY THE BIAS SETTINGS:

OPERATING CURRENT OF THE RELAY WILL BE

= 0.2+(0.2*1.0244)

=0.4048A( BIAS SETTING m1=0.2)

=Is+(BIAS SETTING m1 * BIAS

CURRENT)

EQUIVALENT CURRENT IN CT SECONDARY



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CHENNAI - 600 032. Date: 22/01/2011

=0.2+(0.2*0.9748)

=0.39496A

OPERATING CURRENT OF THE RELAY WIL BE

=0.9748A

= 0.833AEQUIVALENT CURRENT IN CT SECONDARY

=0.833*1.14

= 0.9496A

HENCE BIAS SETTING OF m1 =20%

BIAS SETTING OF m2

DIFFERENTIAL CURRENTAT WORST TAP CONDITION =0.0504A

THIS IS LESS THAN 12% OF OPERATING CURRENT

HENCE BIAS SETTINGS OF

(5% OF 11KV = 11.55KV) = 499.88A

= 10MVA/(1.732*11.55KV)

m1 = 20% (TILL 1.5 TIMES OF FULL LOAD CURRENT)

m2 = 80% (FOR THROUGH FAULT STABILITY)

AT 5% TAP CONDITION CURRENT IN HV BIAS CIRCUIT (WINDING a)

FULL LOAD PRIMARY CURRENT

WITH RATIO CORRECTION THE CURENT AT THE RELAY BIAS

TERMNAL(I1)

=Is+(BIAS SETTING m1 * BIAS

CURRENT)

DIFFERENTIAL CURRENT AT WORST TAP SET =0.0488A

=0.4048AOPERATING CURRENT AT WORST TAP SET

DIFFERENTIAL CURRENT AT WORST TAP CONDITION SHOULD NOT BE MORE THAN 90% OF

OPERATING CURRENT FOR BETTER STABILITY

=80% FOR THROUGH FAULT

STABILITY

=0.39496AOPERATING CURRENT AT WORST TAP

THIS IS LESS THAN 7% OF OPERATING CURRENT

DIFFERENTIAL CURRENT AT WORST TAP CONDITION SHOULD NOT BE MORE THAN 90% OF

THE OPERATING CURRENT FOR BETTER STABILITY

= 1-0.9496

= 0.0504AHENCE THE DIFFERENTIAL CURRENT

BIAS CURRENT=(I1+I2)/2

=(0.9496+1)/2



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CHENNAI - 600 032. Date: 22/01/2011

GROUP

MAIN

MAIN

MAIN

MAIN

MAIN

MAIN

MAIN

MAIN

MAIN

GROUP

MAIN

MAIN

MAIN

GROUP

MAIN

MAIN

GROUP

DIFF

GROUP

DIFF

DIFF

GROUP

DIFF

DIFF

DIFF

DIFF

DIFF

DIFF

DIFF

DIFF

DIFF

DIFF

DIFF

DIFF

DIFF

DIFF

GROUP

REF_1

CONFIGURATION IN P632 RELAY

ADDRESS DESCRIPTION ACTIVE VALUE

/PARAMETER/FUNCTION PARAMETERS/GLOBAL/MAIN

OO3.O3O YES(=ON)DEVICE ONLINE

O72.158 O -SEQ FILT.b en YES

O10.O3O 50HZNOMINAL FREQUENCY fnom

O72.156 O -SEQ FILT.a en YES

O10.O49 A-B-CPHASE SEQUENCE

O72.155 RUSH I (2fo/IfO) 20%

O19.O2O 600AInom CT PRIM, END a

O72.159 OP.MODE RUSH RST NOT PHASE SELECTIVE

O19.O21 1000AInom CT PRIM, END b

O72.148 IR, m2 4.0Iref

Vnom VT PRIM

O72.147 m2 0.7

O1O.O24 1.0AInom DEVICE, END a

O72.146 m1 0.3

O1O.O25 1.0AInom DEVICE, END b

O72.145 Idiff>(CTS) 0.20Iref

O1O.OO9 110V

O72.144 Idiff>>> 30.0Iref

O72.143 Idiff>> 15.0Iref

0.2Iref

O19.O1O VEC GR ENDS a-b PS1 11

O72.142 Idiff>

O72.152 ENABLE PS1 YES

O16.O96 CALCULATEDEVALUATION In, END a


O16.O97 EVALUATION In, END b CALCULATED

O18.OO9 HOLD TIME DYN, PARA CALCULATED

/PARAMETER/FUNCTION PARAMETERS/PARAMETER SUBSET/MAIN

ADDRESS

/PARAMETER/CONFIGURATION PARAMETER/DIFF

DESCRIPTION ACTIVE VALUE

O19.O17 Vnom PRIM END a PS1 11.0KV


O56.O27 FUNCTION GOUP DIFF WITH

/PARAMETER/FUNCTION PARAMETER/GENERAL FUNCTION/DIFF


GENERAL ENABLE USER YES

O19.O16 REFERENCE POWER Sref 10.0MVA

/PARAMETER/CONFIGURATION PARAMETER/REF_1


O56.O37 FUNCTION GOUP REF_1 WITH

ACTIVE VALUEDESCRIPTION

Vnom VT SEC

/PARAMETER/FUNCTION PARAMETERS/GENERAL FUNCTION/MAIN

O1O.OO2 11KV

O19.O8O

O19.O18 Vnom PRIM END b PS1 6.9KV

ADDRESS

/PARAMETER/FUNCTION PARAMETER/PARAMETER SUBSET/DIFF

O72.160 OV. I (5fo/Ifo) 20%



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CHENNAI - 600 032. Date: 22/01/2011

GROUP

REF_1

REF_1

GROUP

REF_1

REF_1

REF_1

REF_1

REF_1

REF_1

REF_1

GROUP

REF_2

GROUP

REF_2

REF_2

GROUP

REF_2

REF_2

REF_2

REF_2

REF_2

REF_2

REF_2

GROUP

IDMT1

GROUP

IDMT1

IDMT1

GROUP

IDMT1

IDMT1

IDMT1

IDMT1

GROUP

IDMT2

O72.141 ENABLE YES


O19.O5O YES

O19.O31 REFERENCE POWER Sref

O72.149 LOW IMPEDANCE

O72.150 Idiff> 0.2Iref

OPERATING MODE


O72.162 m1 O.2

O72.163 m2 1.5

O72.164 IR, m2 1.00Iref

ACTIVE VALUE

/PARAMETER/FUNCTION PARAMETER/GENERAL FUNCTION/REF_1

GENERAL ENABLE USER

/PARAMETER/FUNCTION PARAMETER/PARAMETER SUBSET/REF_1


O72.172 m1 O.2

O8O.OO7 OPERATING MODE LOW IMPEDANCE

O72.17O Idiff> 0.2Iref


ENABLE YES

/PARAMETER/FUNCTION PARAMETER/PARAMETER SUBSET/REF_2

ADDRESS DESCRIPTION

O72.161

/PARAMETER/CONFIGURATION PARAMETER/REF_2


O56.O38 FUNCTION GOUP DIFF WITH

/PARAMETER/FUNCTION PARAMETER/GENERAL FUNCTION/DIFF


O19.O5O GENERAL ENABLE USER YES

O19.O32 REFERENCE POWER Sref 10.0MVA

/PARAMETER/CONFIGURATION PARAMETER/IDMT 1

O72.165 m2 1.5

O72.166 IR, m2 1.00Iref

/PARAMETER/FUNCTION PARAMETER/GENERAL FUNCTION/IDMT 1


O31.141 GENERAL ENABLE USER YES

O19.1O6 SELECT MEASURED INPUT END a

/PARAMETER/FUNCTION PARAMETER/PARAMETER SUBSET/IDMT 1


O81.O5O ENABLE YES

O81.O59 GENERAL STARTING MODE WITH START In/Ineg

O81.O51 Iref, P 1.OOInom

O81.O52 Iref, P DYNAMIC 4.OOInom

/PARAMETER/CONFIGURATION PARAMETER/IDMT 2


O56.O61 FUNCTION GOUP IDMT 2 WITH

10.0MVA


O56.O51 FUNCTION GOUP IDMT 1 WITH



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CHENNAI - 600 032. Date: 22/01/2011

GROUP

IDMT2

IDMT2

GROUP

IDMT2

IDMT2

IDMT2

IDMT2

GROUP

V<>

GROUP

V<>

GROUP

V<>

V<>

V<>

V<>

V<>

V<>

V<>

V<>

V<>

V<>

tV<<O76.OO10

O76.O46 Vmin>

V<

V<<

tV<

O76.OO7

O76.OO8

O76.OO9

/PARAMETER/FUNCTION PARAMETER/GENERAL FUNCTION/IDMT 2


O31.142 GENERAL ENABLE USER YES

O19.116 SELECT MEASURED INPUT END b

/PARAMETER/FUNCTION PARAMETER/PARAMETER SUBSET/IDMT 2


O81.17O ENABLE YES

O81.179 GENERAL STARTING MODE WITH START In/Ineg

O81.171 Iref, P 1.OOInom

O81.172 Iref, P DYNAMIC 4.OOInom

/PARAMETER/CONFIGURATION PARAMETER/V<>

/PARAMETER/FUNCTION PARAMETER/GENERAL FUNCTION/V<>

/PARAMETER/FUNCTION PARAMETER/PARAMETER SUBSET/V<>


O23.O3O GENERAL ENABLE USER YES


O76.OOO ENABLE YES

O76.OO3 V> 1.1OVnom

O76.OO4 V>> 1.2OVnom

O76.OO5 tV> 5.OOS

tV>>O76.OO6

O.25Vnom

1.OOS

O.9Vnom

O.8Vnom

5.OOS

1.OOS


O56.O1O FUNCTION GOUP V<> WITH



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p 632 cvpl transformer setting

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