GE GEK-106465A Instruction Manual page 25

There is a possibility to monitor the trip circuit and trip coil continuity. This can be done by monitoring Vdc through the
output contact when this is open.
As shown on FIGURE 3-10, when the relay is not tripped, trip contact 35-36 remains open. If the breaker is closed, its
auxiliary contact 52a is closed. Therefore, a little current is flowing, about 2 mA, through terminals 15 and 16 through
the voltage detector circuit, which flows through 52/a and the tripping coil 52TC (TC = tripping coil). Current will only
circulate when there is continuity in the whole circuit, so the complete circuit is monitored, and not only the trip coil.
This circuit includes auxiliary 52/a as well as the whole wiring between the battery and the relay tripping terminals,
and between these and the breaker tripping circuit.
This is the first case shown on the table. With closed breaker, voltage is detected by V 52/a sensor, and this means
that there is continuity in the supervised circuit.
In this table, ON means that the voltage detector V52/a is active, detecting voltage presence.
Status of Involved Elements
CIRCUIT
STATUS
Healthy
Healthy
Healthy
Healthy
Faulty
Faulty
Faulty
Faulty
24
INTERNAL STATE
52 open
52 closed
TRIP
TRIP with 52 open
OUTPUT BREAKER
STATUS STATUS
(F35-F36)
Open 52 closed
Open 52 open
Closed 52 closed
Closed 52 open
Open 52 closed
Open 52 open
Closed 52 closed
Closed 52 open
CIO Remote CAN Digital I/O Module
HARDWARE
V 52/a SUPERVISION
ON Ok
ON Ok
OFF Ok if t < 0.5 s
OFF Ok if t < 0.5 s
Input to F650
OPERAND
CONTACT
INPUT_00_10
(Va_COIL2)
V 52/a (F15-F16)
ON
ON
OFF
OFF
OFF
OFF
OFF
OFF
Decision
OPERAND
CONTACT
INPUT_00_15
(SUP_COIL2)
ON
ON
ON (if t < 500 ms)
OFF (if t > 500 ms)
ON (if t < 500 ms)
OFF (if t > 500 ms)
OFF (500 ms delay)
OFF (500 ms delay)
OFF (500 ms delay)
OFF (500 ms delay)
GEK-106465A