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Fault Df:,e['!or Relay Type' CHC
(,E£74f)?r;
PHASE S[QUENCE
1-2-3
OR
3-2-1
1
------.--
. __________ <' _
1
CIRCUIT
BREAKER
3
50
3
4
50
5 6
50
---=/'rs-
2
3
(+>
10I~
PFD
9
50
A
5..Q.
HC
I
50
I
1 11
50
13
T
50
21
~
12fA 1)
A
TO PROTECTIVE
RELAYS
- - ' - - - - - - - - _ . _ - - -
( -)
NOTE:
A SHORT I NG BAR EX I STS BETWEEN STUDS 11
&
12 SO THAT WHEN
RELAYS REMOVED FROM CASE POSITIVE POTENTIAL IS BROUGHT DIRECTLY
TO THE PROTECTIVE RELAYS.
IF THIS
IS
NOT DESIRED, MAKE NO
CONNECTION TO STUD
.11.
.LfGEND
~O
-
CHC13A
PFD -
PHASE FAULT DETECTER
A - AUXILIARY UNIT
T - TARGET
H.C.-HOLDING COIL
(~jE~ USE~J
F'ig.
7'
(0178A7089-1)
8xtl""D.l C,)IUlt'ctions
F,",
'l'lw
CaCl 'A
}~'.'.l;~:,
'7
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