Troubleshooting
3WJ Air Circuit breakers
208 Operating Instructions, 12/2022, L1V30828903001-01
Fixed-
mounted
Circuit
Withdraw-
able Circuit
Breakers
Fault Cause Remedy
The Circuit Breaker cannot be
switched from the maintenance
position to the disconnected posi-
tion.
The positioning mechanism
of the Circuit Breaker is not
in the disconnected posi-
tion (note the position
Rack the positioning mech-
anism to the disconnected
position.
insert the Circuit Breaker in
a guide frame with a differ-
Only use Circuit Breakers
with the same rated cur-
rent as the guide frame.
guide frame are encoded
When the Circuit Breaker is racked
from the disconnected position to
the test position, you encounter a
high level of resistance as soon as
you pass the disconnected position.
The Circuit Breaker was not
inserted as far as it will go
and the side latches are not
yet engaged (warning:
danger of destroying the
Push the Circuit Breaker to
the disconnected position
as far as it will go. The side
latches must engage.
When you rack the Circuit Breaker
from the disconnected position to
the test position, it does not move
for the first eight rotations.
No fault, due to the func-
tion
The racking handle cannot be in-
serted.
been pressed.
Press the OFF button and,
at the same time, move the
slide switch to the right.
The cabinet door is not
completely shut.
locked with padlock(s).
1
The cabinet door cannot be opened
(door interlock as accessory).
When the Circuit Breaker is
closed, this interlocks the
The Circuit Breaker is in the
operating position.
Rack the Circuit Breaker to
the test position or discon-
1
2
Effective when the cabinet door is open (accessory).
Note the following safety information:
Override only if permissible under normal operating conditions.
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