Immediately perform an inspection after such faults.
Correct the cause of the fault as described in the respective remedial measures section. Repair
any damage to the machine.
8.9.2
Electrical faults
Note
If you are operating the motor with a converter, the operating instructions of the converter must
also be observed if electrical faults occur.
Table 8-1
Electrical faults
↓ Motor fails to start
↓ Motor accelerates sluggishly
↓ Rumbling noise during startup
↓ Rumbling noise during operation
↓ High temperature rise during no-load operation
↓ High temperature rise with load
↓ High temperature rise of individual winding sections
Possible causes of faults
Remedial measures
X
X
X
X
Overload
Reduce the load.
X
Interrupted phase in the supply cable
Check the switches and cables.
X
X
X
X
Interrupted phase in the feeder cable af‐
ter switching on
Check the switches and cables.
X
Mains voltage too low, frequency too high Check the power supply conditions.
X
Mains voltage too high, frequency too low Check the power supply conditions.
X
X
X
X
X Stator winding incorrectly connected
Check the winding connection in the terminal box.
X
X
X
X Winding short circuit or phase short cir‐
cuit in stator winding
Determine the winding resistances and insulation
resistances. Carry out repair work after consulta‐
tion with the manufacturer.
X
Incorrect direction of rotation
Check the connection.
Operation
8.9 Faults
SIMOTICS HV C 1NB1402-2AA84-4CA0-Z
Operating Instructions 06/2018
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Summary of Contents for 1NB1402-2AA84-4CA0-Z
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Page 84: ...Operation 8 9 Faults SIMOTICS HV C 1NB1402 2AA84 4CA0 Z 84 Operating Instructions 06 2018 ...
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Page 155: ...AF Einbauerklärung Loher LDX U157 AJ EC Declaration of Conformity U161 ...