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D.1 TRIP CIRCUIT SUPERVISION FOR MII-FAMILY RELAYS
For monitoring the trip circuit while the breaker is open and when it is closed, a resistor must be added in parallel to the
52a contact, as shown below:
D
D-2
+Vdc
TRIP
Breaker
Auxiliary
Contact (52a)
R
TRIP COIL
VALUE OF RESISTOR R
Supply
48 Vdc
125 Vdc
250 Vdc
MIFII Digital Feeder Relay
A5
TRIP
A6
A8
INP#1
A9
INP#2
A10
COM
Ohms
Watts
10 K
2
25 K
5
50 K
5
APPENDIX D
GEK-106237P
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