Testing a circuit breaker, Replacing a circuit breaker – Labconco Type C1 Biosafety Cabinet Models 30468 User Manual
Page 118

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Circuit Breaker Specifications, 230 VAC
Cabinet Width (feet)
4
6
Motor/Light Breaker Rating,
Amps
6
6
Motor/Light Breaker, Labconco
Part #
1327203
1327203
Motor/Light Breaker,
Mechanical Products Part #
1600-062-
060-007
1600-062-
060-007
Outlet Breaker Rating, Amps
3
3
Outlet Breaker, Labconco
Part #
1327200
1327200
Outlet Breaker, Mechanical
Products Part #
1600-062-
030-007
1600-062-
030-007
Testing a circuit breaker
Note: If the breaker is tripped (white button is extended), press the reset button
of the breaker. If it does not reset smoothly, the breaker has failed and must be
replaced.
1.
With the breaker reset, unplug the Axiom, either at the wall, or at the power
cord inlet at the back of the electronics module, as shown in Figure 7-2.
2.
Remove the three 7/16-inch nuts that secure the module.
3.
Tip the module on its side to access the breakers.
4.
Using a continuity meter, check the continuity (resistance) across the
terminals of the breaker being tested.
5.
The resistance across the breaker should not exceed the resistance noted
when the meter probes are connected to each other.
Replacing a circuit breaker
1.
Unplug the Axiom, either at the wall, or at the power cord inlet at the back of
the electronics module, as shown in Figure 7-2.
2.
Remove the three 7/16-inch nuts that secure the module.
3.
Tip the module on its side to access the breakers.
4.
Disconnect the wires connected to the breaker terminals.
5.
Using a pair of pliers, loosen the chrome ring nut outside of the reset button.
Remove the ring nut, and pull the breaker out of the electronics module.