KNEE POINT VOLTAGE CALCULATION FOR PS CLASS (BUSBAR DIFFERNTIAL & TRANSFORMER DIFFERNTIAL) A - PARAMETER & DESIGN INPUT FOR BUSBAR
A-1 A-2 A- A-% A-$ A-/ A-" A-# A-4
Name ame of sub substaon aon Make of relay Ty!e of relay Total =A , 'b. Ma)*mum *nternal symmetr*+al fault +urrent - kA , I*nt ma) . Transformer 'ate0 urrent -I*ntr Transformer *m!e0en+e- Ma)*mum e)ternal symmetr*+al fault +urrent - A , Ie)tma) . 5a+tor of symmetr*+al fault +urrent -6ss+
BANG ANGWE SUB SUBSTA STATIO TION SIEMENS "UT#$ $ 2$ 2/2% # 2#3"$ %1/////////"
A&&'O(
B - PARAMETER & DESIGN INPUT FOR CURRENT TRANSFORMER
B-1 B-2 B-
T se se+on0ary ary +o +ore 0eta*l - &S +l +lass
Prima Primary ry Curre Current nt - Amp( Amp(Ipr Ipr))
Second Secondary ary Curr Current ent - Amp(I Amp(Isr) sr)
/33 33
1 1
C - PARAMETER & DESIGN INPUT FOR CONTROL CABLE
-1 -2 -
able s*7e for T 9en:t; of +able - 6M 'es*stan+e 'es*stan+e of +able >6M at "3?
% ( % s8mm 33" %/1
D - PARAMETER & DESIGN INPUT FOR RELAY
<-1
TOTA9 9EA< 'ESISTANE , 'l@. ,'ESISTANE>6M. 'l@. ,'ESISTANE>6M.9ENGTC 9ENGTC O5 AB9E
322"
E - CT ADEQUACY CALCULATION - Vk REQUIRED= (If X 1 ! P"#$%" C'""* ) X ( R+* , R , . R/0 ) E-1
E-. E-.
E-
MINIMUM = . .XI"X(R+*,R/0,R) .XI"=
.
R/0,R=
234525
M##$'$ R6'#"$* =
.(R+*,1)
I*" I*"%/ %/ F%'/ F%'/*7 *7 Vk Vk REQUI REQUIRED RED= = 358( 358(I# I#** $%8 $%8 X 1 1 ! P"#$ P"#$%" %" C'"" C'""* * ) X ( R+* R+* , R , . R/0 R/0 ) R,.R/0=
234525
358(If X 1 ! P"#$%" C'""* )=
1434444444449
/+*: k ;<#* =
. (RCT , 1)
I*"%/ F%'/*7 Vk REQUIRED=1348(I8* REQUIRED=1348(I8* $%8 X 1 ! P"#$%" C'""* ) X ( R+* , R , . R/0 ) R,.R/0= 1348I8*$%8 ! P"#$%" C'""* )=
234525 ?39594444449
/+*: k ;<#* =
1 (RCT , 1)
@%/ /+<7 * $%8#$'$ "6'#"$*
. (RCT , 1)
BURDEN CALCULATION FOR METERING & PROTECTION CORE A - PARAMETER & DESIGN INPUT FOR TRANSMISSION LINE A-1 A-2 A- A-% A-$
Name of substaon Make of meter Ty!e of meter Bur0en of meter - =A ,'m. BU'
BANGWE SUBSTATION DDDD DDDD $ $
A&&'O( A&&'O(
Primary Current - Amp
Secondary Current - Amp
CLASS
VA
/33 /33
1 1
32s $&23
23 23
B - PARAMETER & DESIGN INPUT FOR CURRENT TRANSFORMER B-1 B-2 B-
T se+on0ary +ore 0eta*l METE'ING &'OTETION
C - PARAMETER & DESIGN INPUT FOR CONTROL CABLE -1
able s*7e for T
% ( % s8mm
-2 -
9en:t; of +able - 6M 'es*stan+e of +able >6M at "3?
33" %/1
D - PARAMETER & DESIGN INPUT FOR RELAY <-1
9EA< 'ESISTANE , 'l@. ,'ESISTANE>6M.9ENGTC O5 AB9E
322"
E - CT ADEQUACY CALCULATION - VA REQUIRED = M*" B'": , L%: B'": = M*" B'": , (. R/0) = Rm + ( 2 X Rl) E-1
E - CT ADEQUACY CALCULATION - VA REQUIRED = RELAY B'": , L%: B'": = RELAY B'": , (. R/0) E-1 = Rr + ( 2 X Rl)
REMARKST "6'#": '": # #*# .2 *< 1
AFa*lable 'e8u*re0 VA
VA
23
!"#$!$
AFa*lable 'e8u*re0 VA
VA
23
!"#$!$