ct vt calculation al ain rev.1

7/24/2019 CT VT Calculation Al AIN Rev.1

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LARSEN & TOUBRO LIMITED

ECC Division - EDRC (Electrical)

PROJECT : 33/11kV S/S IN AL AIN AREA Ref : G1409--RL7440J353 A

PREP CH! APPR! !ATETITLE : CT P"#"$e%e# C"&'(&"%)o*+

RAJIV SA / AS RJ

1 33kV Cable Feeder -Directional Over Current & Earth Fault Protection (67,67!

1"1 #he C# detail$

C(##e*% T#"*+fo#$e# , CT-1. CORE-1

R"%e P#)$"# C(##e*% I* , 00-400/1A

R"%e Se'o*"# C(##e*% I+* , 1 A

CT C&"++ , 5 P 20

Se'o*"# )*)* Re+)+%"*'e R'% , 2 O$+ "% 400 A %"

Se&e'%e T" , 400 A

1"% $$u'tion$ :

Te 6"83P8S8C C(##e*% of 33kV (+ , 31.5 kA

1"3 )ela*$ Proo$ed

" 6"ke , A

!)#e'%)o*"& O;e# C(##e*% Re&" , SPAS 34< C

' !)#e'%)o*"& E"#% "(&% Re&" , REJ 527

R"%e Re&" +e'o*"# '(##e*% I# , 1 A

1"+ Calculation o ead .urden )

C"&e 'o*+)e#e fo# CT 'o**e'%)o* , 4 +=8$$ C(

AC Re+)+%"*'e of %e '"&e > 70e C , 5852 O$+/k$

Le*% e%?ee* CT "* %e Re&" , 30 6%#+

S)*&e Le" Re+)+%"*'e f#o$ CT %o , 08030 5852

Re&" RL , 081 O$+

2RL , 0833 O$+VA (#e* of %e Le" , @11 0833 VA

, 0833 VA

1"/ .urden o )ela*

!)#e'%)o*"& O;e# C(##e*% Re&" @SPAS 34< C , 100 $o$

2580382004


3/41





RAJIV SA / AS RJ258038200

4

1"6 .urden Detail$

S8No8 !e;)'e (#e* 6"ke"8 !)#e'%)o*"& O;e# C(##e*% Re&" 0810 SPAS 34< C. A

8 !)#e'%)o*"& E"#% "(&% Re&" 0810 REJ 527. A

'8 Le" (#e* 0833

#otal .urden 0853

1"7 ccurac* i'it Factor o the C#

AB+ Re=()#e$e*% *B Ik$"/I*

Ik$" , H)e+% "(&% C(##e*%

I* , No$)*"& P#)$"# C(##e*% of %e CT , 400 A

He*'e "+ Pe# A @*B $(+% e #e"%e# %"* 31500 / 400

79

Re"& "''(#"' L)$)% "'%o# *B , *

* , CT #"%e A''(#"' L)$)% "'%o# , 20

, R"%e CT Po?e# , 15 VA Co+e* V"&(e

, , 2 "%%+

, (#e* "% R"%e C(##e*% , 0853

*B , 20 @1580 D 280 / @0853 D 280

, 134

*B , 134 79 . +o %e '(##e*% %#"*+fo#$e# +"%)+f)e+ %e #e=()#e$e*%8

1"0 Conclu$ion

CT R"%)o Se&e'%e , 6-+21

Se&e'%e T" , +

@PND P

E

@PD PE

PN

PE

CT I*%e#*"& Lo++e+ I*2 R'%

P


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RAJIV SA / AS RJ 2580382004

% 33kV Cable Feeder -Pilot 5ire Protection- (0/!

%"1 #he C# detail$

C(##e*% T#"*+fo#$e# , CT-1 Co#e-2

R"%e P#)$"# C(##e*% I* , 00-400/1A

R"%e Se'o*"# C(##e*% I+* , 1 A

CT A''(#"' C&"++ ,

Se'o*"# )*)* Re+)+%"*'e R'% , 2 O$+ "% 400 A %"

Se&e'%e T" , 400 A

%"% $$u'tion$ :Te 6"83P8S8C C(##e*% of 33kV (+ , 31.5 kA

%"3 )ela* Proo$ed

" 6"ke , 6/S V"%e' Re#o&&e L%8

Te , So&k"# Rf

R"%e Re&" +e'o*"# '(##e*% I# , 1 A

%"+ Calculation o ead .urden )

C"&e 'o*+)e#e fo# CT 'o**e'%)o* , 4 +=8$$ C(

AC Re+)+%"*'e of %e '"&e > 70e C , 5852 O$+/k$

Le*% e%?ee* CT "* %e Re&" , 30 6%#+

S)*&e Le" Re+)+%"*'e f#o$ CT %o , 08030 5852

Re&" RL , 081 O$+

2RL , 0833 O$+

%"/ nee Point Voltae )e8uire'ent

A+ e# 6"*(f"'%(#e#e+ Re=()#e$e*%Vk 9: (/2;n! < (;2! = ()ct


5/41






R"%e So#% T)$e Te#$"& C(##e*% , 31"/ k or 3 4ec


6/41






3 33kV Cable Feeder -?eterin

3"1 #he C# detail$

C(##e*% T#"*+fo#$e# , CT-1 Co#e-3

R"%e P#)$"# C(##e*% I* , 00-400/1A

R"%e Se'o*"# C(##e*% I+* , 1 A

CT C&"++ , 085 S

Se'o*"# )*)* Re+)+%"*'e R'% , 2 O$+ "% 400 A %"

Se&e'%e T" , 400 A

3"% $$u'tion$ :

Te 6"83P8S8C C(##e*% of 33kV (+ , 31.5 kA

3"3 Calculation o ead .urden )

C"&e 'o*+)e#e fo# CT 'o**e'%)o* , 4 +=8$$ C(

AC Re+)+%"*'e of %e '"&e > 70e C , 5852 O$+/k$

Le*% e%?ee* CT "* %e Re&" , 30 6%#+

S)*&e Le" Re+)+%"*'e f#o$ CT %o , 08030 5852Re&" RL , 081 O$+

2RL , 0833 O$+

VA (#e* of %e Le" , @11 0833 VA

, 0833 VA

3"+ .urden Detail$

S8No8 !e;)'e (#e* 6"ke

"8 " Co*%#o& *)% 0810 A. RE 542

8 6(&%)f(*'%)o* 6e%e# 080 CIRCTOR. CV6

'8 A$$e%e# T#"*+('e# 2820 CELSA. CRI

8 Le" (#e* 0833

#otal .urden 3823


7/41






No%e :

18 I*+%#($e*% +e'(#)% f"'%o# @IS +"&& e &e++ %"* 5 "% "&& %"+ "* +"&& e e*+(#e %e CT

$"*(f"'%(#e#828

+"&& e*+(#e %e 6e%e#)* "* 'o**e'%e I*+%#($e*%+ "#e *o% +%#e++e eo* )%+ So#% %)$e

?)%+%"* '""')% #o;))* $e"*+ &)ke !($$ Re+)+%o# e%'8

e*e;e# %e "'%("& (#e* )+ &e++ %"* %e *o%e (#e* of %e CT. #o%e'%)o* P"*e& Manufacturer


8/41





RAJIV SA / AS RJ

+ 33kV .u$ .ar Dierential Protection ine Feeder (07.!

+"1 #he C# detail$

C(##e*% T#"*+fo#$e# , CT-1 Co#e-4

R"%e P#)$"# C(##e*% fo# CT I* , 1200 / 1A

R"%e Se'o*"# C(##e*% I+* , 1 A

CT C&"++ , 5 P 20

Se'o*"# )*)* Re+)+%"*'e R'% , O$+ "% 1200 A %"

Se&e'%e T" , 1200 A

+"% $$u'tion$ :

Te 6"83P8S8C C(##e*% of 33kV (+ , 31.5 kA

S+%e$ /R R"%)o , 20

S+%e$ L/R #"%)o , 20 / (2x3.14x50)

, 0.064 +e'

, 4 $+e'

+"3 Calculation o ead .urden )C"&e 'o*+)e#e fo# CT 'o**e'%)o* , 4 +=8$$ C(

AC Re+)+%"*'e of %e '"&e > 70e C , 5852 O$+/k$

Le*% e%?ee* CT "* %e Re&" , 30 6%#+

S)*&e Le" Re+)+%"*'e f#o$ CT %o , 08030 5852

Re&" RL , 081 O$+

2RL , 0833 O$+

VA (#e* of %e Le" , @11 0833 VA

, 0833 VA

+"+ .urden Detail$

S8No8 !e;)'e (#e* 6"ke

"8 Re&" (#e* 0802 A. RE 500

8 Le" (#e* 0833

2580382004


9/41






4

b" Condition -% (#akin DC #i'e con$tant in to Con$ideration!

*B , 10

*B , 20

e#e

*B , Effe'%);e "''(#"' &)$)% "'%o#

, 6")$($ P#)$"# %#o( f"(&% '(##e*%, 3185 kA

, R"%e P#)$"# CT '(##e*%

, !C T)$e 'o*+%"*%

A+ e# Co*)%)o*-1*B , @131500 / @5 1200

, 5825

A+ e# Co*)%)o*-2

*B , 10 o# %e %)$e 'o*+%"*% of 4 $+e'

He*'e %e $")$($ ;"&(e of %e *B fo#$ %e 'o*)%)o* 1 "* 'o*)%)o* 2 )+ +e&e'%e fo# 'o$"#)+o*8

n@ 9: 1

R"%e "''(#"' L)$)% "'%o# *B , *

@%o e #o;)e %e CT $"*(f"'%(#e#

e#e

* , CT R"%e A''(#"' L)$)% "'%o# , 20

, R"%e VA , 10 VA Co+e* V"&(e

, , "%%+

, (#e* "% R"%e C(##e*% , 0835

*B , 20 @1080 D 80 / @0835 D 80

, 50

*B, 50 10 . +o %e '(##e*% %#"*+fo#$e# +"%)+f)e+ %e #e=()#e$e*%8

+"6 Conclu$ion

CT R"%)o Se&e'%e L)*e eee# , 1% 2 1

fo# TNF, 120$+. o#

fo# 120$+F,TNF, 300$+

Ik$"

I1N

TN

@PND P

E

@PD PE

PN

PE

CT I*%e#*"& Lo++e+ I*2 R'%

P


10/41





RAJIV SA / AS RJ

/ 33kV .u$ .ar Dierential Protection #ran$or'er Feeder (07.!

#he C# detail$

C(##e*% T#"*+fo#$e# , CT-T1-1 Co#e-1

R"%e P#)$"# C(##e*% fo# CT , 1200/1 A

R"%e Se'o*"# C(##e*% , 1 A

R"%e VA of %e CT , 10 VA

CT C&"++ , 5 P 20

Se'o*"# )*)* Re+)+%"*'e , O$+ "% 1200 A %"

R"%e Co*%)*(o(+ Te#$"& C(##e*% , 150 R"%e So#% T)$e Te#$"& C(##e*% , 3185 kA fo# 3 Se'

No%e : o# !e%")&e '"&'(&"%)o* #efe# '&"(+e 4 8

2580382004


11/41






4


12/41






6 33kV #ran$or'er Feeder -?eterin

6"1 #he C# detail$

C(##e*% T#"*+fo#$e# , CT-T1-1 Co#e-2

R"%e P#)$"# C(##e*% I* , 00-300/1 A

R"%e Se'o*"# C(##e*% I+* , 1 A

CT C&"++ , 085 S

Se'o*"# )*)* Re+)+%"*'e R'% , 185 O$+ "% 300 A %"

Se&e'%e T" , 300 A

6"% $$u'tion$ :

Te 6"83P8S8C C(##e*% of 33kV (+ , 3185 kA

T#"*+fo#$e# 6VA R"%)* , 15 6VA

T#"*+fo#$e# kV R"%)* , 33 / 11855 kV

Lo" C(##e*% o* 33kV S)e , 2284 A

Lo" C(##e*% o* 11855kV S)e , 7498< A

6"3 Calculation o ead .urden )C"&e 'o*+)e#e fo# CT 'o**e'%)o* , 4 +=8$$ C(

AC Re+)+%"*'e of %e '"&e > 70e C , 5852 O$+/k$

Le*% e%?ee* CT "* %e Re&" , 30 6%#+

S)*&e Le" Re+)+%"*'e f#o$ CT %o , 08030 5852

Re&" RL , 081 O$+

2RL , 0833 O$+

VA (#e* of %e Le" , @11 0833 VA

, 0833 VA

6"+ .urden Detail$

S8No8 !e;)'e (#e* 6"ke

"8 " Co*%#o& *)% 0810 A. RE 542


13/41








14/41






No%e :

18 I*+%#($e*% +e'(#)% f"'%o# @IS +"&& e &e++ %"* 5 "% "&& %"+ "* +"&& e "++(#e %e$"*(f"'%(#e#8

28

+"&& e*+(#e %e 6e%e#)* "* 'o**e'%e I*+%#($e*%+ "#e *o% +%#e++e eo* )%+ So#% %)$e

?)%+%"* '""')% #o;))* $e"*+ &)ke !($$ Re+)+%o# e%'8

e*e;e# %e "'%("& (#e* )+ &e++ %"* %e *o%e (#e* of %e CT. #o%e'%)o* P"*e& Manufacturer


15/41





RAJIV SA / AS RJ

7 33kV #ran$or'er Dierential Protection Calculation (07#!

7"1 #he C# detail$

C(##e*% T#"*+fo#$e# , CT-T1-1 Co#e-3 / CT-T1-2 CORE-1

R"%e P#)$"# C(##e*% fo# CT o* 33kV +)e , 00-300/1 A

R"%e P#)$"# C(##e*% fo# CT o* 11kV +)e , 1000-


16/41






4

kV R"%)* of %e T#"*+fo#$e# , 33 / 11855 kV

6VA R"%)* of %e T#"*+fo#$e# , 15 6VA

Pe# *)% I$e"*'e , 10 I$e"*'e of %e T#"*+fo#$e# o* 33 kV S)e , 0810@33 33 / 15

, 782 o$+

I$e"*'e of %e T#"*+fo#$e# o* 11855 kV S)e , 0810@11855 11855 / 15

, 08


17/41






4

o# Ik$"/I* '"&'(&"%e "o;e *B , 9 @f#o$ AB+ Re&" C"%"&o(e

@)(#e-1 P"e 3/3

*B , 30< 9 . +o %e '(##e*% %#"*+fo#$e# +"%)+f)e+ %e #e=()#e$e*%8

a 11kV 4ide

A+ e# Re&" $"*(f"'%(#e#+ C"%"&o(e

*B F, *

e#e

*B , Effe'%);e "''(#"' &)$)% "'%o#

, Nominal current Related to Protected Obect !

15000 / +=#%@3 / 11855 , 750 A

, Nominal current of "# !


18/41






4

7"7 Conclu$ion

CT R"%)o Se&e'%e fo# 33kV S)e , 6-321

CT R"%)o Se&e'%e fo# 11kV S)e , 1-021 R"%e VA of %e CT o* 33kV S)e , 1 V

R"%e VA of %e CT o* 11kV S)e , 1 V

Se&e'%e T" o* 33kV S)e , 3

Se&e'%e T" o* 11kV S)e , 0

CT Se'o*"# Re+)+%"*'e o* 33kV +)e , 1"/ Oh'$

CT Se'o*"# Re+)+%"*'e o* 11kV +)e , + Oh'$

A''(#"' C&"++ , >

I $"*e%)+)* , 3 ' A Vk2%*ee o)*% Vo&%"e o* 33kV S)e , +

*ee o)*% Vo&%"e o* 11kV S)e , +

R"%e Co*%)*(o(+ Te#$"& C(##e*% , 1/



19/41





RAJIV SA / AS RJ

0 33kV #ran$or'er Feeder -Directional Over Current Protection (/1-/1!

0"1 #he C# detail$

C(##e*% T#"*+fo#$e# , CT-T1-1.CORE-4

R"%e P#)$"# C(##e*% I* , 00-300/1A

R"%e Se'o*"# C(##e*% I+* , 1 A

CT C&"++ , 5 P 20

Se'o*"# )*)* Re+)+%"*'e R'% , 185 O$+ "% 300 A %"

Se&e'%e T" , 300 A

0"% $$u'tion$ :

Te 6"83P8S8C C(##e*% of 33kV (+ , 31.5 kA

T#"*+fo#$e# 6VA R"%)* , 15 6VA

T#"*+fo#$e# kV R"%)* , 33 / 11855 kV

Lo" C(##e*% o* 33kV S)e , 2284 A

Lo" C(##e*% o* 11855kV S)e , 7498< A

0"3 )ela*$ Proo$ed

" 6"ke , A

!)#e'%)o*"& O;e# C(##e*% "* E"#% f"(&% Re&" , SPAJ 140C

' R"%e Re&" +e'o*"# '(##e*% I# , 1 A


C"&e 'o*+)e#e fo# CT 'o**e'%)o* , 4 +=8$$ C(

AC Re+)+%"*'e of %e '"&e > 70e C , 5852 O$+/k$

Le*% e%?ee* CT "* %e Re&" , 30 6%#+

S)*&e Le" Re+)+%"*'e f#o$ CT %o , 08030 5852

Re&" RL , 0817 O$+

2RL , 0833 O$+

VA (#e* of %e Le" , @11 0833 VA

, 0833 VA

2580382004


20/41






4

o# %e S+%e$ (*e# Co*+)e#"%)o*

Re"& "''(#"' L)$)% "'%o# *B , *

e#e

* , CT #"%e A''(#"' L)$)% "'%o# , 20

, R"%e CT Po?e# , 10 VA @Se&e'%e V"&(e

, , 185 "%%+, (#e* "% R"%e C(##e*% , 0843

*B , 20 @10 D 185 / @0843 D 185

, 119

*B , 119 105 . +o %e '(##e*% %#"*+fo#$e# +"%)+f)e+ %e #e=()#e$e*%8

0"7 Conclu$ion

CT R"%)o Se&e'%e , 6-321Se&e'%e T" , 3

CT Se'o*"# Re+)+%"*'e , 1"/ Oh'$

R"%e VA of %e CT 'o#e , 1 V

A''(#"' C&"++ , / P %

R"%e Co*%)*(o(+ Te#$"& C(##e*% , 1/


@PND P

E

@PD P

E

PN

PE CT I*%e#*"& Lo++e+ I*2

R'%P


21/41





RAJIV SA / AS RJ

B 33kV #ran$or'er Feeder -)e$tricted Earth Fault Protection- (6+)!

B"1 #he C# detail$

C(##e*% T#"*+fo#$e# , CT-T1-N CORE-1

R"%e P#)$"# C(##e*% I* , 1000- 70e C , 5852 O$+/k$

Le*% e%?ee* CT "* %e Re&" , 30 6%#+

S)*&e Le" Re+)+%"*'e f#o$ CT %o , 08030 5852

Re&" RL , 0817 O$+

2RL , 0833 O$+

B"/ #hrouh ault current calculation

V R"%)* of %e T#"*+fo#$e# , 33 / 11855 kV

6VA #"%)* of %e %#"*+fo#$e# , 15 6VA

T#"*+fo#$e# Pe# (*)% )$e"*'e , 10 8(

2580382004


22/41






4

Ik$" , 6")$($ %#o( f"(&% '(##e*% fo# ?)' #e&"

$(+% *o% oe#"%e* , C(##e*% T#"*+fo#$e# %(#*+ #"%)o

R'% , Se'o*"# Re+)%"*'e @ O$+

RL , To%"& #e+)+%"*'e of %e &o*e+% $e"+(#)* ')#'()%

+ , 749


23/41






4

Te )*(% I$e"*'e of %e SPAJ115C #e&" , 081 O$+

S)*'e %e )*(% )$e"*'e of %e #e&" )+ *e&))&e )* 'o$"#)+o* %o %e ;"&(e of +%")&)+)* #e+)+%o#.%e +"$e )+ *o% +(+%#"'%e f#o$ %e '"&'(&"%e ;"&(e of R+ "o;e8

B"B Conclu$ion

CT R"%)o Se&e'%e , 1-021

Se&e'%e T" , 0

CT Se'o*"# Re+)+%"*'e , + Oh'$

R"%e VA of %e CT 'o#e Se&e'%e fo# Re+%#)'%e, 1 V

E"#% f"(&% #o%e'%)o*6)*)$($ *ee o)*% Vo&%"e Re=()#e$e*% , + V

A''(#"' C&"++ , >

I $"*e%)+)* , 3 ' A Vk2%

R"%e Co*%)*(o(+ Te#$"& C(##e*% , 1/



24/41






1 33kV #ran$or'er Feeder -4tand .* Earth Fault Protection (4.EF!

1"1 #he C# detail$

C(##e*% T#"*+fo#$e# , CT-T1-N CORE-2

R"%e P#)$"# C(##e*% I* , 1000-


25/41






, (#e* "% R"%e C(##e*% , 0843P


26/41






*B , 20 @1580 D 480 / @0843 D 480

,


27/41





RAJIV SA / AS RJ

11 11kV Cable Feeder -Directional Over Current Protection (/1-/1!

11"1 #he C# detail$

C(##e*% T#"*+fo#$e# , CT-3 CORE-1

R"%e P#)$"# C(##e*% I* , 00-300/1A

R"%e Se'o*"# C(##e*% I+* , 1 A

CT C&"++ , 5 P 20

Se'o*"# )*)* Re+)+%"*'e R'% , 185 O$+ "% 300 A %"

Se&e'%e T" , 300 A

11"% $$u'tion$ :

Te 6"83P8S8C C(##e*% of 33kV (+ , 31.5 kA > 33 kV

11"3 )ela*$ Proo$ed

" 6"ke , A

!)#e'%)o*"& O;e# C(##e*% Re&" , RE 542 P&(+

' !)#e'%)o*"& E"#% "(&% Re&" , RE 542 P&(+

R"%e Re&" +e'o*"# '(##e*% I# , 1 A


C"&e 'o*+)e#e fo# CT 'o**e'%)o* , 4 +=8$$ C(

AC Re+)+%"*'e of %e '"&e > 70e C , 5852 O$+/k$

Le*% e%?ee* CT "* %e Re&" , 30 6%#+

S)*&e Le" Re+)+%"*'e f#o$ CT %o , 08030 5852

Re&" RL , 0817 O$+

2RL , 0833 O$+

VA (#e* of %e Le" , @11 0833 VA, 0833 VA

11"/ .urden Detail$

S8No8 !e;)'e (#e* 6"ke

"8 !)#e'%)o*"& O;e# C(##e*% Re&" 0810 RE 542 P&(+

2580382004


28/41






4

o# %e S+%e$ (*e# Co*+)e#"%)o*

Re"& "''(#"' L)$)% "'%o# *B , *

e#e

* , CT #"%e A''(#"' L)$)% "'%o# , 20


, , 185 "%%+, (#e* "% R"%e C(##e*% , 0843

*B , 20 @1080 D 185 / @0843 D 185

, 119

*B , 119 105 . +o %e '(##e*% %#"*+fo#$e# +"%)+f)e+ %e #e=()#e$e*%8

11"7 Conclu$ion

CT R"%)o Se&e'%e , 6-321Se&e'%e T" , 3

CT Se'o*"# Re+)+%"*'e , 1"/ Oh'$

R"%e VA of %e CT 'o#e Se&e'%e fo# !)#e'%)o*"&, 1 V

O;e#'(##e*% E"#% f"(&% #o%e'%)o*

A''(#"' C&"++ , / P %


@PND P

E

@PD P

E

PN

PE

CT I*%e#*"& Lo++e+ I*

2 R'%

P


29/41





RAJIV SA / AS RJ

1% 11kV #ran$or'er Feeder -Directional Over Current Protection (/1-/1!

1%"1 #he C# detail$

C(##e*% T#"*+fo#$e# , CT-T1-2. CORE-4

R"%e P#)$"# C(##e*% I* , 1000- 33 kV

T#"*+fo#$e# 6VA R"%)* , 15 6VA

T#"*+fo#$e# kV R"%)* , 33 / 11855 kV

Lo" C(##e*% o* 33kV S)e , 2284 A

Lo" C(##e*% o* 11855kV S)e , 7498< A

1%"3 )ela*$ Proo$ed

" 6"ke , A

!)#e'%)o*"& O;e# C(##e*% "* E"#% f"(&% Re&" , SPAJ 140C

' R"%e Re&" +e'o*"# '(##e*% I# , 1 A

1%"+ Calculation o ead .urden )

C"&e 'o*+)e#e fo# CT 'o**e'%)o* , 4 +=8$$ C(

AC Re+)+%"*'e of %e '"&e > 70e C , 5852 O$+/k$

Le*% e%?ee* CT "* %e Re&" , 10 6%#+

S)*&e Le" Re+)+%"*'e f#o$ CT %o , 08010 5852Re&" RL , 080 O$+

2RL , 0811 O$+

VA (#e* of %e Le" , @11 0811 VA

, 0811 VA

2580382004


30/41






4

o# %e S+%e$ (*e# Co*+)e#"%)o*

Re"& "''(#"' L)$)% "'%o# *B , *

e#e

* , CT #"%e A''(#"' L)$)% "'%o# , 20


, , 4 "%%+, (#e* "% R"%e C(##e*% , 0821

*B , 20 @10 D 480 / @0821 D 480

, 7

*B , 7 39 . +o %e '(##e*% %#"*+fo#$e# +"%)+f)e+ %e #e=()#e$e*%8

1%"7 Conclu$ion

CT R"%)o Se&e'%e , 1-021Se&e'%e T" , 0

CT Se'o*"# Re+)+%"*'e , + Oh'$

R"%e VA of %e CT 'o#e Se&e'%e fo# !)#e'%)o*"&, 1 V

O;e#'(##e*% E"#% f"(&% #o%e'%)o*

A''(#"' C&"++ , / P %

R"%e Co*%)*(o(+ Te#$"& C(##e*% , 1/


@PND P

E

@PD P

E

PN

PE

CT I*%e#*"& Lo++e+ I*

2 R'%

P


31/41




PREP CH! APPR! !ATETITLE : VT P"#"$e%e# C"&'(&"%)o*+


1 33kV ;E V#

1"1 V# Detail$

VT : PT-1. CORE-1

Vo&%"e R"%)* : 33/3 / 110/3

VA R"%)* : 100 VA

Co#e-1 : C& :1

1"% V# .urden Calculation

.urden on Core-1

Vo&%"e R"%)* of %e VT , 110 V

VA R"%)* of %e VT , 100 VA

C(##e*% S(&)e VT "% $")$($ VA R"%)* , @100 +=#%@3 / @110

18575 A

@" Le" (#e* o* Co#e-1

C"&e

#o$ To

1 VT S*'#o*)+)* C)#'()% 4C 285


32/41






1"3 Conclu$ion

A'%("& (#e* of %e L)*e-1 VT Co#e-1 : 1B"B7 V

Se&e'%e P"#"$e%e#+VA #"%)* Se&e'%e : 1" V

A''(#"' C&"++ of Co#e-1 : Cl 1


33/41






% 33kV ;E V#

%"1 V# Detail$

VT : PT-1. CORE-2

Vo&%"e R"%)* : 33/3 / 110/3

VA R"%)* : 50 VA

Co#e-2 : C& :3P

%"% V# .urden Calculation

.urden on Core-%

Vo&%"e R"%)* of Te VT , 110 V

VA R"%)* of %e VT , 50 VA

C(##e*% S(&)e VT "% $")$($ VA R"%)* , @50 +=#%@3 / @110

087


34/41






%"3 Conclu$ion

A'%("& (#e* of %e L)*e-1 VT Co#e-2 : "03 V

Se&e'%e P"#"$e%e#+VA #"%)* Se&e'%e : /" V

A''(#"' C&"++ of Co#e-2 : Cl 3P


35/41






3 33kV .4 V#

3"1 V# Detail$

VT : PT-S-1. CORE-1

Vo&%"e R"%)* : 33/3 / 110/3

VA R"%)* : 100 VA

Co#e-1 : C& :1

3"% V# .urden Calculation

.urden on Core-1

Vo&%"e R"%)* of Te VT , 110 V

VA R"%)* of %e VT , 100 VA

C(##e*% S(&)e VT "% $")$($ VA R"%)* , @100 +=#%@3 / @110

18575 A

@" Le" (#e* o* Co#e-1

C"&e

#o$ To

1 VT S*'#o*)+)* C)#'()% 4C 285


36/41






3"3 Conclu$ion

A'%("& (#e* of %e L)*e-1 VT Co#e-1 : 1+"B7 V

Se&e'%e P"#"$e%e#+VA #"%)* Se&e'%e : 1" V

A''(#"' C&"++ of Co#e-1 : Cl 1


37/41






+ 11kV V#

+"1 V# Detail$

Vo&%"e R"%)* : 11/3 / 110/3

VA R"%)* : 100 VA

Co#e-1 : C& :1

+"% V# .urden Calculation

.urden on Core-1

Vo&%"e R"%)* of Te VT , 110 V

VA R"%)* of %e VT , 100 VA

C(##e*% S(&)e VT "% $")$($ VA R"%)* , @100 +=#%@3 / @110

18575 A

@" Le" (#e* o* Co#e-1

C"&e

#o$ To

1 VT S*'#o*)+)* C)#'()% 4C 285


38/41






+"3 Conclu$ion

A'%("& (#e* of %e 11kV eee# VT Co#e-1 : 1B"B7 V

Se&e'%e P"#"$e%e#+VA #"%)* Se&e'%e : 1" V

A''(#"' C&"++ of Co#e-1 : Cl 1


39/41

)evi$ion Date 1%"+"%+

De$crition C# o" Cla$$ .urden k )ct )ela*

(2! (V! (V! (Oh'!

CT-1. CORE-1 00-400/1A 5 P 20 15 - 2 SPAS 34< C

CT-1 Co#e-2 00-400/1A - 400 2 So&k"# Rf

33kV C"&e eee# -6e%e#)* CT-1 Co#e-3 00-400/1A 085 S 10 - 2 -

CT-1 Co#e-4 1200 / 1A 5 P 20 10 - A. RE 500

CT-T1-1 Co#e-1 1200/1 A 5 P 20 10 -

CT-T1-1 Co#e-2 00-300/1 A 085 S 10 -

00-300/1 A

10 -

1000-


40/41

#echnical Data

R"%e Vo&%"e 3 kV

Se#;)'e Vo&%"e 33 kV

#e=(e*' 50 H

So#% %)$e C(##e*% @1 +e'8 31.5 kA6"k)* C(##e*%


41/41

)evi$ion Date 1%"+"%+

De$crition Function Cla$$ .urden k )ct )ela*

(2! (V! (V! (Oh'!

V# Data )atio .urden Cla$$

(V2V! (V!

#echnical Data dditional C#$ re8uire'ent$

R"%e Vo&%"e 12 kVSe#;)'e Vo&%"e 11 kV

#e=(e*' 50 H

So#% %)$e C(##e*% @1 +e'8 25 kA

6"k)* C(##e*% 3 kA

)%+%"* Vo&%"e @1 $)* 2< kV

IL @kV 75 kV

A$)e*% Te$e#"%(#e -7C8888D50C

S%"*"# IEC

Po&"#)% P1 %o C

)atio

ct vt calculation al ain rev.1

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