7/21/2019 Transformer Differential Calculations and Slope Characteristics v 1.1

http://slidepdf.com/reader/full/transformer-differential-calculations-and-slope-characteristics-v-11 1/9

 Transformer Dierential Pr

PARAMETERS DATA TO BE ENTERED HERE

Enter HV Side Voltage 66000

Enter LV Side Voltage 11000

Enter The Rated Power of the Transformer 31500000Enter CT Primary on HV Side 400

Enter CT Secondary on HV Side 1

Enter CT Primary on LV Side 2000

Enter CT Secondary on LV Side 1

RESULTS OBTAINED

ull Load Current on HV Side !" prim# 275.5616208272

ull Load Current on LV Side !" sec# 1653.3697249633

$mplitude %ultiplication factor on HV side 1.4515809524$mplitude %ultiplication factor on LV side 1.2096507937

RESPECTIVE CT SECONDARY VALUES OBTAINED

CT secondary current in HV side !"a# 0.6889040521

CT secondary current in LV side!"&# 0.8266848625

SLOPE TESTING

LOAD

NORMAL CONDITION

IN!ECTED VALUEI" I#

HV SIDE CURRENT LV SIDE CURRENT

'( ()(*++,(-(./ ()(+/**+-+*/ ()' ()'

/( ()'011+(+'(- ()'*.00*,1/. ()/ ()/

0( ()/(**1'/'.* ()/-+((.-.+1 ()0 ()0

-( ()/1..*'*/(+ ()00(*10,-. ()- ()-

.( ()0---./(/* ()-'00-/-0'/ (). ().

*( ()-'00-/-0'/ ()-,*('(,'1. ()* ()*

1( ()-+//0/+0*- ().1+*1,-(01 ()1 ()1+( ()..''/0/-'1 ()**'0-1+, ()+ ()+

,( ()*/(('0*-*, ()1--('*01*/ (), (),

'(( ()*++,(-(./' ()+/**+-+*/. ' '

''( ()1.11,--.10 (),(,0.00-+1 ')' ')'

'/( ()+/**+-+*/. (),,/(/'+0. ')/ ')/

'0( ()+,..1./*11 ')(1-*,(0/'/ ')0 ')0

'-( (),*--*.*1/, ')'.10.++(1. ')- ')-

'.( ')(000.*(1+' ')/-((/1/,01 '). ').

7/21/2019 Transformer Differential Calculations and Slope Characteristics v 1.1

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'*( ')'(//-*-+00 ')0//*,.1+ ')* ')*

'1( ')'1''0*+++. ')-(.0*-/**/ ')1 ')1

'+( ')/-((/1/,01 ')-++(0/1./. ')+ ')+

',( ')0(+,'1*,+, ').1(1('/0+1 '), '),

/(( ')011+(+'(-' ')*.00*,1/. / /

//( ').'..++,'-. ')+'+1(**,1. /)/ /)/

/-( ')*.00*,1/. '),+-(-0*1 /)- /)-/*( ')1,''.(.0.- /)'-,0+(*-/. /)* /)*

/+( '),/+,0'0-.+ /)0'-1'1*'-, /)+ /)+

0(( /)(**1'/'.*/ /)-+((.-.+1- 0 0

00( /)/100+001'+ /)1/+(*((-*/ 0)0 0)0

0*( /)-+((.-.+1- /),1*(*..(-, 0)* 0)*

0,( /)*+*1/.+(0' 0)//-(1(,*01 0), 0),

-0( /),*//+1-/0, 0)..-1--,(+1 -)0 -)0

-1( 0)/01+-,(--1 0)++.-'++.01 -)1 -)1

.'( 0).'0-'(**.. -)/'*(,/1,+1 .)' .)'

7/21/2019 Transformer Differential Calculations and Slope Characteristics v 1.1

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7/21/2019 Transformer Differential Calculations and Slope Characteristics v 1.1

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  otection Calculations and Slope Characteristics

UNIT

V

V

VAA

A

A

A

A

A

A

A

$AULT CONDITION

I %I& I #'"(OPERATED VALUE

I" I#HV SIDE CURRENT LV SIDE CURRENT

0   ()' ()(*++,(-(./ ( ()' (

0   ()/ ()'011+(+'(- ()/ (

0   ()0 ()/(**1'/'.* ()0 (

0   ()- ()/1..*'*/(+ ()- (

0   (). ()0---./(/* (). (

0   ()* ()-'00-/-0'/ ()* (

0   ()1 ()-+//0/+0*- ()1 (0   ()+ ()..''/0/-'1 ()+ (

0   (), ()*/(('0*-*, (), (

0   ' ()*++,(-(./' ' (

0   ')' ()1.11,--.10 ')' (

0   ')/ ()+/**+-+*/. ')/ (

0   ')0 ()+,..1./*11 ')0 (

0   ')- (),*--*.*1/, ')- (

0   '). ')(000.*(1+' '). (

( ' / 0(

().

'

').

/

/).

0

S)*+, C-""/,'('/(

7/21/2019 Transformer Differential Calculations and Slope Characteristics v 1.1

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0   ')* ')'(//-*-+00 ')* (

0   ')1 ')'1''0*+++. ')1 (

0   ')+ ')/-((/1/,01 ')+ (

0   '), ')0(+,'1*,+, '), (

0   / ')011+(+'(-' / (

0   /)/ ').'..++,'-. /)/ (

0   /)- ')*.00*,1/. /)- (0   /)* ')1,''.(.0.- /)* (

0   /)+ '),/+,0'0-.+ /)+ (

0   0 /)(**1'/'.*/ 0 (

0   0)0 /)/100+001'+ 0)0 (

0   0)* /)-+((.-.+1- 0)* (

0   0), /)*+*1/.+(0' 0), (

0   -)0 /),*//+1-/0, -)0 (

0   -)1 0)/01+-,(--1 -)1 (

0   .)' 0).'0-'(**.. .)' (

7/21/2019 Transformer Differential Calculations and Slope Characteristics v 1.1

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7/21/2019 Transformer Differential Calculations and Slope Characteristics v 1.1

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I %'& I #'"(

()' ()(.

()/ ()'

()0 ()'.

()- ()/

(). ()/.

()* ()0

()1 ()0.()+ ()-

(), ()-.

' ().

')' ()..

')/ ()*

')0 ()*.

')- ()1

'). ()1.

- . *

7/21/2019 Transformer Differential Calculations and Slope Characteristics v 1.1

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')* ()+

')1 ()+.

')+ (),

'), (),.

/ '

/)/ ')'

/)- ')//)* ')0

/)+ ')-

0 ').

0)0 ')*.

0)* ')+

0), '),.

-)0 /)'.

-)1 /)0.

.)' /)..

7/21/2019 Transformer Differential Calculations and Slope Characteristics v 1.1

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