Troubleshooting Table - Allen-Bradley 140G-R Installation Instructions Manual

9

Troubleshooting Table

The circuit breaker fails to open when the opening pushbutton is pressed
The circuit breaker fails to open because opening coil has tripped
The circuit breaker fails to open. Tripped on Undervoltage Release.
The circuit breaker fails to open when the protection relay release test is performed
The circuit breaker fails to close when the closing pushbutton is pressed
The circuit breaker fails to close because closing coil has tripped
The closing springs cannot be loaded with the manual loading lever
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WARNING: If the fault or failure of the circuit breaker in your application could cause injuries, material damage
!
or is highly critical, the circuit breaker itself must be immediately removed so that it can be inspected or repaired.
DIR 1000682R0002 Version 03
The closing springs cannot be loaded with the spring-charging motor
The circuit breaker cannot be locked in the open position
Possible causes
The opening solenoid of the relay is not
connected properly
Relay tripping signal not reset
Supply votage of the auxiliary circuits too
low
Supply voltage different from the value indi-
cated on the nameplate of these releases
Faulty switching circuit
Loose clamping screws of the wires and
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auxiliary circuits
Incorrect electrical connections in the
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power supply circuit
Coil damaged
Operating mechanism locked
Open position key lock activated
Undervoltage release not energized
Shunt trip remains permanently energized
Operating mechanism locked
The fuse that protects the spring loading
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motor protection has tripped
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Faulty spring charging motor
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Circuit breaker closed
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Lock in open position defective
Make sure that the opening solenoid is con-
nected correctly
Press the mechanical pushbutton to reset the
relay tripping signal
Measure the voltage: it must not be less than
85% of the rated voltage of the coil
Check the voltage indicated on the nameplate of
the releases
Check the connections, fuses, interlocks, protec-
tion switches
Make sure that the wire clamping screws are
tight
Check the connections with the relative func-
tional diagram
Replace the coil
Operate in the manual mode. Contact Rockwell
Automation if the fault persists
Unlock by inserting the key
Check the relative supply circuit and the supply
voltage
Check the supply circuit
Call Rocwell Automation Technical Support
Replace the fuse
Replace the spring charging motor
Press the opening pushbutton and activate the
lock
Call Rockwell Automation Technical Support
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Checks and solutions