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59
IB-65100
Recommended Renewal Parts and Replacement Procedures
7) Anti-Pump Relay Assembly
This assembly is located near the top of the
mechanism, to the right of the opening
springs (Figure 6, b).
CAUTION
CAUTION
!
Ensure that the control circuits are
deenergized and the circuit breaker is
deenergized, disconnected by means of a
visible break, and securely grounded. Do NOT
start to work on a closed circuit breaker or a
circuit breaker with the main closing spring
charged.
Perform the following steps to replace the
anti-pump relay assembly:
a. Remove the front cover of the circuit
breaker.
b. Disconnect the wires from the
anti-pump relay assembly, being
careful to note which wires go to which
terminal.
c. Remove the mounting screws of the
mounting bracket of the assembly and
remove the assembly from the circuit
breaker.
d. Remove the anti-pump relay from the
mounting bracket by removing the
retaining clip from the anti-pump relay.
e. Insert the new anti-pump relay back
into the mounting bracket and fasten
the retaining clip to the anti-pump relay.
f. Reconnect all wires to the proper
terminals of the relay.
g. Relays in 250VDC closing circuits are
provided with dropping resistors to
apply the proper voltage to the relay
coil. The resistor is mounted adjacent
to the relay. It may be replaced by
disconnecting if from the relay and
unscrewing the mounting feet from
the circuit breaker frame, replacing the
resistor and reassembling.
h. Operate the circuit breaker several times
to ensure the relay functions properly.
i. Replace the front cover.
