Download - CT VT Calculation Al AIN Rev.1
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7/24/2019 CT VT Calculation Al AIN Rev.1
1/41
1
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7/24/2019 CT VT Calculation Al AIN Rev.1
2/41
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
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7/24/2019 CT VT Calculation Al AIN Rev.1
3/41
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"#"$e%e# C"&'(&"%)o*+
RAJIV SA / AS RJ258038200
4
1"6 .urden Detail$
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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7/24/2019 CT VT Calculation Al AIN Rev.1
4/41
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"#"$e%e# C"&'(&"%)o*+
RAJIV SA / AS RJ 2580382004
% 33kV Cable Feeder -Pilot 5ire Protection- (0/!
%"1 #he C# detail$
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$e*%Vk 9: (/2;n! < (;2! = ()ct
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7/24/2019 CT VT Calculation Al AIN Rev.1
5/41
LARSEN & TOUBRO LIMITED
ECC Division - EDRC (Electrical)
PROJECT : 33/11kV S/S IN AL AIN AREA Ref : G1409--RL7440J353 A
PREP CH! APPR! !ATETITLE : CT P"#"$e%e# C"&'(&"%)o*+
RAJIV SA / AS RJ 2580382004
R"%e So#% T)$e Te#$"& C(##e*% , 31"/ k or 3 4ec
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7/24/2019 CT VT Calculation Al AIN Rev.1
6/41
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"#"$e%e# C"&'(&"%)o*+
RAJIV SA / AS RJ 2580382004
3 33kV Cable Feeder -?eterin
3"1 #he C# detail$
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$$e%e# T#"*+('e# 2820 CELSA. CRI
8 Le" (#e* 0833
#otal .urden 3823
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7/24/2019 CT VT Calculation Al AIN Rev.1
7/41
LARSEN & TOUBRO LIMITED
ECC Division - EDRC (Electrical)
PROJECT : 33/11kV S/S IN AL AIN AREA Ref : G1409--RL7440J353 A
PREP CH! APPR! !ATETITLE : CT P"#"$e%e# C"&'(&"%)o*+
RAJIV SA / AS RJ 2580382004
No%e :
18 I*+%#($e*% +e'(#)% f"'%o# @IS +"&& e &e++ %"* 5 "% "&& %"+ "* +"&& e e*+(#e %e CT
$"*(f"'%(#e#828
+"&& e*+(#e %e 6e%e#)* "* 'o**e'%e I*+%#($e*%+ "#e *o% +%#e++e eo* )%+ So#% %)$e
?)%+%"* '""')% #o;))* $e"*+ &)ke !($$ Re+)+%o# e%'8
e*e;e# %e "'%("& (#e* )+ &e++ %"* %e *o%e (#e* of %e CT. #o%e'%)o* P"*e& Manufacturer
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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"#"$e%e# C"&'(&"%)o*+
RAJIV SA / AS RJ
+ 33kV .u$ .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
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7/24/2019 CT VT Calculation Al AIN Rev.1
9/41
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"#"$e%e# C"&'(&"%)o*+
RAJIV SA / AS RJ258038200
4
b" Condition -% (#akin DC #i'e con$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$"
I1N
TN
@PND P
E
@PD PE
PN
PE
CT I*%e#*"& Lo++e+ I*2 R'%
P
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7/24/2019 CT VT Calculation Al AIN Rev.1
10/41
LARSEN & TOUBRO LIMITED
ECC Division - EDRC (Electrical)
PROJECT : 33/11kV S/S IN AL AIN AREA Ref : G1409--RL7440J353 A
PREP CH! APPR! !ATETITLE : CT P"#"$e%e# C"&'(&"%)o*+
RAJIV SA / AS RJ
/ 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
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7/24/2019 CT VT Calculation Al AIN Rev.1
11/41
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"#"$e%e# C"&'(&"%)o*+
RAJIV SA / AS RJ258038200
4
-
7/24/2019 CT VT Calculation Al AIN Rev.1
12/41
LARSEN & TOUBRO LIMITED
ECC Division - EDRC (Electrical)
PROJECT : 33/11kV S/S IN AL AIN AREA Ref : G1409--RL7440J353 A
PREP CH! APPR! !ATETITLE : CT P"#"$e%e# C"&'(&"%)o*+
RAJIV SA / AS RJ 2580382004
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
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7/24/2019 CT VT Calculation Al AIN Rev.1
13/41
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"#"$e%e# C"&'(&"%)o*+
RAJIV SA / AS RJ 2580382004
R"%e So#% T)$e Te#$"& C(##e*% , 31"/ k or 3 4ec
-
7/24/2019 CT VT Calculation Al AIN Rev.1
14/41
LARSEN & TOUBRO LIMITED
ECC Division - EDRC (Electrical)
PROJECT : 33/11kV S/S IN AL AIN AREA Ref : G1409--RL7440J353 A
PREP CH! APPR! !ATETITLE : CT P"#"$e%e# C"&'(&"%)o*+
RAJIV SA / AS RJ 2580382004
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
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7/24/2019 CT VT Calculation Al AIN Rev.1
15/41
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
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-
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7/24/2019 CT VT Calculation Al AIN Rev.1
16/41
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 RJ258038200
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
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7/24/2019 CT VT Calculation Al AIN Rev.1
17/41
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 RJ258038200
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 "# !
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18/41
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 RJ258038200
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/
R"%e So#% T)$e Te#$"& C(##e*% , 31"/ k or 3 4ec
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19/41
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
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
0"+ 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 , 0817 O$+
2RL , 0833 O$+
VA (#e* of %e Le" , @11 0833 VA
, 0833 VA
2580382004
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7/24/2019 CT VT Calculation Al AIN Rev.1
20/41
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 RJ258038200
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/
R"%e So#% T)$e Te#$"& C(##e*% , 31"/ k or 3 4ec
@PND P
E
@PD P
E
PN
PE CT I*%e#*"& Lo++e+ I*2
R'%P
-
7/24/2019 CT VT Calculation Al AIN Rev.1
21/41
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
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
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7/24/2019 CT VT Calculation Al AIN Rev.1
22/41
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 RJ258038200
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
-
7/24/2019 CT VT Calculation Al AIN Rev.1
23/41
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 RJ258038200
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/
R"%e So#% T)$e Te#$"& C(##e*% , 31"/ k or 3 4ec
-
7/24/2019 CT VT Calculation Al AIN Rev.1
24/41
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 2580382004
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-
-
7/24/2019 CT VT Calculation Al AIN Rev.1
25/41
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 2580382004
, (#e* "% R"%e C(##e*% , 0843P
-
7/24/2019 CT VT Calculation Al AIN Rev.1
26/41
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 2580382004
*B , 20 @1580 D 480 / @0843 D 480
,
-
7/24/2019 CT VT Calculation Al AIN Rev.1
27/41
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
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
11"+ Calculation o ead .urden )
C"&e 'o*+)e#e fo# CT 'o**e'%)o* , 4 +=8$$ C(
AC Re+)+%"*'e of %e '"&e > 70e C , 5852 O$+/k$
Le*% e%?ee* CT "* %e Re&" , 30 6%#+
S)*&e Le" Re+)+%"*'e f#o$ CT %o , 08030 5852
Re&" RL , 0817 O$+
2RL , 0833 O$+
VA (#e* of %e Le" , @11 0833 VA, 0833 VA
11"/ .urden Detail$
S8No8 !e;)'e (#e* 6"ke
"8 !)#e'%)o*"& O;e# C(##e*% Re&" 0810 RE 542 P&(+
2580382004
-
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28/41
LARSEN & TOUBRO LIMITED
ECC Division - EDRC (Electrical)
PROJECT : 33/11kV S/S IN AL AIN AREA Ref : G1409--RL7440J353 A
PREP CH! APPR! !ATETITLE : CT P"#"$e%e# C"&'(&"%)o*+
RAJIV SA / AS RJ258038200
4
o# %e S+%e$ (*e# Co*+)e#"%)o*
Re"& "''(#"' L)$)% "'%o# *B , *
e#e
* , CT #"%e A''(#"' L)$)% "'%o# , 20
, R"%e CT Po?e# , 10 VA @Se&e'%e V"&(e
, , 185 "%%+, (#e* "% R"%e C(##e*% , 0843
*B , 20 @1080 D 185 / @0843 D 185
, 119
*B , 119 105 . +o %e '(##e*% %#"*+fo#$e# +"%)+f)e+ %e #e=()#e$e*%8
11"7 Conclu$ion
CT R"%)o Se&e'%e , 6-321Se&e'%e T" , 3
CT Se'o*"# Re+)+%"*'e , 1"/ Oh'$
R"%e VA of %e CT 'o#e Se&e'%e fo# !)#e'%)o*"&, 1 V
O;e#'(##e*% E"#% f"(&% #o%e'%)o*
A''(#"' C&"++ , / P %
R"%e So#% T)$e Te#$"& C(##e*% , 31"/ k or 3 4ec
@PND P
E
@PD P
E
PN
PE
CT I*%e#*"& Lo++e+ I*
2 R'%
P
-
7/24/2019 CT VT Calculation Al AIN Rev.1
29/41
LARSEN & TOUBRO LIMITED
ECC Division - EDRC (Electrical)
PROJECT : 33/11kV S/S IN AL AIN AREA Ref : G1409--RL7440J353 A
PREP CH! APPR! !ATETITLE : CT P"#"$e%e# C"&'(&"%)o*+
RAJIV SA / AS RJ
1% 11kV #ran$or'er Feeder -Directional Over Current Protection (/1-/1!
1%"1 #he C# detail$
C(##e*% T#"*+fo#$e# , CT-T1-2. CORE-4
R"%e P#)$"# C(##e*% I* , 1000- 33 kV
T#"*+fo#$e# 6VA R"%)* , 15 6VA
T#"*+fo#$e# kV R"%)* , 33 / 11855 kV
Lo" C(##e*% o* 33kV S)e , 2284 A
Lo" C(##e*% o* 11855kV S)e , 7498< A
1%"3 )ela*$ Proo$ed
" 6"ke , A
!)#e'%)o*"& O;e# C(##e*% "* E"#% f"(&% Re&" , SPAJ 140C
' R"%e Re&" +e'o*"# '(##e*% I# , 1 A
1%"+ Calculation o ead .urden )
C"&e 'o*+)e#e fo# CT 'o**e'%)o* , 4 +=8$$ 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
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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"#"$e%e# C"&'(&"%)o*+
RAJIV SA / AS RJ258038200
4
o# %e S+%e$ (*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
, , 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#$"& C(##e*% , 1/
R"%e So#% T)$e Te#$"& C(##e*% , 31"/ k or 3 4ec
@PND P
E
@PD P
E
PN
PE
CT I*%e#*"& Lo++e+ I*
2 R'%
P
-
7/24/2019 CT VT Calculation Al AIN Rev.1
31/41
LARSEN & TOUBRO LIMITED
ECC Division - EDRC (Electrical)
PROJECT : 33/11kV S/S IN AL AIN AREA Ref : G1409--RL7440J353 A
PREP CH! APPR! !ATETITLE : VT P"#"$e%e# C"&'(&"%)o*+
RAJIV SA / AS RJ 2580382004
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
-
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32/41
LARSEN & TOUBRO LIMITED
ECC Division - EDRC (Electrical)
PROJECT : 33/11kV S/S IN AL AIN AREA Ref : G1409--RL7440J353 A
PREP CH! APPR! !ATETITLE : VT P"#"$e%e# C"&'(&"%)o*+
RAJIV SA / AS RJ 2580382004
1"3 Conclu$ion
A'%("& (#e* of %e L)*e-1 VT Co#e-1 : 1B"B7 V
Se&e'%e P"#"$e%e#+VA #"%)* Se&e'%e : 1" V
A''(#"' C&"++ of Co#e-1 : Cl 1
-
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33/41
LARSEN & TOUBRO LIMITED
ECC Division - EDRC (Electrical)
PROJECT : 33/11kV S/S IN AL AIN AREA Ref : G1409--RL7440J353 A
PREP CH! APPR! !ATETITLE : VT P"#"$e%e# C"&'(&"%)o*+
RAJIV SA / AS RJ 2580382004
% 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
-
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34/41
LARSEN & TOUBRO LIMITED
ECC Division - EDRC (Electrical)
PROJECT : 33/11kV S/S IN AL AIN AREA Ref : G1409--RL7440J353 A
PREP CH! APPR! !ATETITLE : VT P"#"$e%e# C"&'(&"%)o*+
RAJIV SA / AS RJ 2580382004
%"3 Conclu$ion
A'%("& (#e* of %e L)*e-1 VT Co#e-2 : "03 V
Se&e'%e P"#"$e%e#+VA #"%)* Se&e'%e : /" V
A''(#"' C&"++ of Co#e-2 : Cl 3P
-
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35/41
LARSEN & TOUBRO LIMITED
ECC Division - EDRC (Electrical)
PROJECT : 33/11kV S/S IN AL AIN AREA Ref : G1409--RL7440J353 A
PREP CH! APPR! !ATETITLE : VT P"#"$e%e# C"&'(&"%)o*+
RAJIV SA / AS RJ 2580382004
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
-
7/24/2019 CT VT Calculation Al AIN Rev.1
36/41
LARSEN & TOUBRO LIMITED
ECC Division - EDRC (Electrical)
PROJECT : 33/11kV S/S IN AL AIN AREA Ref : G1409--RL7440J353 A
PREP CH! APPR! !ATETITLE : VT P"#"$e%e# C"&'(&"%)o*+
RAJIV SA / AS RJ 2580382004
3"3 Conclu$ion
A'%("& (#e* of %e L)*e-1 VT Co#e-1 : 1+"B7 V
Se&e'%e P"#"$e%e#+VA #"%)* Se&e'%e : 1" V
A''(#"' C&"++ of Co#e-1 : Cl 1
-
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37/41
LARSEN & TOUBRO LIMITED
ECC Division - EDRC (Electrical)
PROJECT : 33/11kV S/S IN AL AIN AREA Ref : G1409--RL7440J353 A
PREP CH! APPR! !ATETITLE : VT P"#"$e%e# C"&'(&"%)o*+
RAJIV SA / AS RJ 2580382004
+ 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
-
7/24/2019 CT VT Calculation Al AIN Rev.1
38/41
LARSEN & TOUBRO LIMITED
ECC Division - EDRC (Electrical)
PROJECT : 33/11kV S/S IN AL AIN AREA Ref : G1409--RL7440J353 A
PREP CH! APPR! !ATETITLE : VT P"#"$e%e# C"&'(&"%)o*+
RAJIV SA / AS RJ 2580382004
+"3 Conclu$ion
A'%("& (#e* of %e 11kV eee# VT Co#e-1 : 1B"B7 V
Se&e'%e P"#"$e%e#+VA #"%)* Se&e'%e : 1" V
A''(#"' C&"++ of Co#e-1 : Cl 1
-
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)evi$ion Date 1%"+"%+
De$crition C# o" Cla$$ .urden k )ct )ela*
(2! (V! (V! (Oh'!
CT-1. CORE-1 00-400/1A 5 P 20 15 - 2 SPAS 34< C
CT-1 Co#e-2 00-400/1A - 400 2 So&k"# Rf
33kV C"&e eee# -6e%e#)* CT-1 Co#e-3 00-400/1A 085 S 10 - 2 -
CT-1 Co#e-4 1200 / 1A 5 P 20 10 - A. RE 500
CT-T1-1 Co#e-1 1200/1 A 5 P 20 10 -
CT-T1-1 Co#e-2 00-300/1 A 085 S 10 -
00-300/1 A
10 -
1000-
-
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#echnical Data
R"%e Vo&%"e 3 kV
Se#;)'e Vo&%"e 33 kV
#e=(e*' 50 H
So#% %)$e C(##e*% @1 +e'8 31.5 kA6"k)* C(##e*%
-
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)evi$ion Date 1%"+"%+
De$crition Function Cla$$ .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