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Electrical Faults - Siemens SIMOTICS DP 1PC136 Operating Instructions Manual

Low-voltage motors
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Operation
8.6 faults
8.6.2

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
 
X
X
 
X
 
X
X
 
 
 
 
 
 
X
X
X
 
X
 
X
 
 
 
 
 
 
 
 
X
 
X
X
X
X
 
 
 
X
X
X
 
 
 
 
 
 
 
X
80
↓ High temperature rise of individual winding sections
 
Possible causes of faults
 
Overload
 
Interrupted phase in the supply cable
 
Interrupted phase in the feeder cable af‐
ter switching on
 
Mains voltage too low, frequency too
high
 
Mains voltage too high, frequency too
low
X
Stator winding incorrectly connected
X
Winding short circuit or phase short cir‐
cuit in stator winding
 
Incorrect direction of rotation
Remedial measures
Reduce the load.
Check the switches and cables.
Check the switches and cables.
Check the power supply conditions.
Check the power supply conditions.
Check the winding connection in the terminal
box.
Determine the winding resistances and insulation
resistances. Carry out repair work after consulta‐
tion with the manufacturer.
Check the connection.
1PC134, 1PC136 crane motors SH 132 ... 315
Operating Instructions, 12/2023, A5E43212221A

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