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Recommended Renewal Parts and Replacement Procedures
IB-60201
e. Place the new anti-pump relay over
the lower screw and reinstall the upper
screw and tighten both screws.
f. 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.
g. Operate the circuit breaker several times
to ensure the relay functions properly.
h. Replace the front cover.
9) Latch Check Switch
The latch check switch is located on the left
side of the main mechanism frame, near the
bottom of the main closing spring
(Figure 2, q).
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
latch check switch assembly:
a. Remove front cover of the circuit
breaker.
b. Remove two screws holding switch to
mechanism. Do not lose the nut plate
into which these screws are threaded.
c. Disconnect wires from the switch.
d. Connect the wires to the new switch
and fasten switch in place with screws
and nut plate previously removed.
e. Adjust the switch. To adjust the switch
see
Ch 5 Maintenance,
B. M
echAnISM
A
reA
, 5) Mechanism Adjustments,
d. Latch Check Switch Adjustment.
f. Operate circuit breaker electrically
several times to ensure the switch
functions properly.
g. Replace the front cover.
10) Motor Cutoff Switch Assembly
The motor cutoff switch assembly is located
on the floor pan of the mechanism area just
right of the main mechanism (Figure 2, ag).
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
motor cutoff switch assembly:
a. Remove the front cover of the circuit
breaker.
b. Disconnect the wires from the motor
cutoff switch assembly, being careful to
note which wires go to which terminal.
c. Remove the two bolts holding the
assembly to the circuit breaker floor pan
and remove the assembly.
d. Install the new cutoff switch assembly
by bolting it to the floor pan. Reconnect
the wiring and no adjustments are
needed at this time.
e. Operate the circuit breaker electrically
several times to ensure the switch
functions properly.
f. Replace the front cover.
