Troubleshooting
8.1 Troubleshooting for circuit breaker
3WA1 air circuit breaker
542 Equipment Manual, 02/2023, 92310000002-06
Troubleshooting for fixed-mounted circuit breaker
Circuit breaker cannot be closed
electrically:
Circuit breaker is ready for operation.
The auxiliary supply connectors are
unplugged.
Plug in the auxiliary supply
connectors.
The control cabinet door cannot be
opened (door interlocking as
accessory).
Closing the circuit breaker locks the
control cabinet door.
Open the circuit breaker.
1)
1)
Safety device. The safety measure can only be removed after it has been checked that this is operationally
Troubleshooting for withdrawable circuit breaker
The circuit breaker cannot be
switched from the "ABS" (absent)
position to the disconnected position.
The racking mechanism is not in the
disconnected position.
Rack the racking mechanism to the
disconnected position (green position
The circuit breaker cannot be
inserted in the guide rails.
The factory coding of the circuit
breaker and the guide frame do not
match.
Use the circuit breaker as indicated
on the guide frame.
When you rack the circuit breaker
from the disconnected position to the
test position, the circuit breaker does
not move for the first six rotations
approximately.
Not a fault, function-related.
The racking handle cannot be pulled
out for racking.
The circuit breaker is closed.
Press the O / OPEN button and lift
the racking handle lock.
1)
The control cabinet door is not
completely closed (racking lock as
Close the control cabinet door.
The racking handle cannot be
reinserted.
The racking handle is locked.
Rack the circuit breaker to the
disconnected, test or connected
position. Unlock the racking handle
and insert it such that it is flush.
The control cabinet door cannot be
opened (door interlocking as
The circuit breaker is in the
connected position.
Rack the circuit breaker to the test or
disconnected position.
1)
1)
Only permissible if the main circuit may be interrupted.
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