BUS
R
SOURCE
FEEDER GROUP
SOU RCE
FEEDER GROUP
SOURCE
FEEDER GROUP
TO C. T. S
: =- =- .:I
CONNECT I ONS SAME AS PH . l
{--r-------
-
-
-
- - - - -
-,
� - - - - - - - - - - - - - - -�
--
I
TO C . T. S
: =
_
_
�
ONNE CT
�
N
�
SAME
_!
S
_!�
_
_ _
--'
DC TR I P BUS
DEV I CE NUMBER CHART
PH .
1
lp�.
PH .
3
87 - PERCENTAGE D t F FERENT I A L RELAY ,TYP E CA-6
ICS - I ND I CA T I N G CONTACTOR SWI TCH
OP - OPERA T I N G CO I L
R - PA I RED RESTRA I NT CO I L
(
TOP FRONT ELENENT
)
S - PA I RED RESTRA I N T CO I L
(
BOTTOM REAR ELEMENT
)
T - PA I RED R ESTRA I NT CO I L
(
BOTTOM FRONT ELEt£HT
)
I N
TYPE
CA-6
RELAY
86 - AUX I L I A RY TR I PP I NG RELAY , TYPE WL
1 83A l 90
Fig.
7.
External Schematic of One Set of Type CA-6 Relays for Protection of a Six Circuit B us With Three Feeder Groups.
6
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