Faults In Operation - Siemens SIMOTICS DC 1GH7 Operating Instructions Manual

Operation
8.9 Faults
8.9.2

Faults in operation

Table 8-2 Faults in operation
Symptoms of fault
↓
↓
↓
↓
X
X X
X X X
X
X
X
X
X
X X
X
X
72
General uneven running of machine
Vibrating brushes
High temperature rise (general)
Severe brush sparking
Possible causes of faults
Plant fault
Coupled motor out of balance
Poor alignment
Resonance in system
Operating mode or operating error
Continuous light-load duty (partial load)
Temporary overload
Continuous overload
Cooling fault
Cooling air-flow rate too low (commutator temper‐
ature too high)
Component defect
Interturn fault
Out-of-round commutator
Rotor imbalance
Bearing damage
Remedial measures
Check coupling, rebalance system
Align motor set
Improve installation conditions or reduce exci‐
tation of vibration
Change number of brushes and/or material
Correct current limit on converter
Correct current limit on converter/reduce down
periods of rest
Improve ventilation circuit
Repair winding
Rework commutator
Balance rotor
Repair or replace bearing
Operating Instructions 02/2016
SIMOTICS DC 1GH7