Siemens SIMOTICS XP 1LG6 - Page 59

Operation
Explosion-protected machines
56100000002002, 01/2016
131
Table 8-1 Electrical influences
Electrical fault characteristics
↓
Machine will not start up
↓
Machine starts up reluctantly
↓
Rumbling noise during startup
↓
Rumbling noise during operation
↓
Overheating during no-load operation
↓
Overheating when under load
↓
Overheating of individual winding sections
Possible causes of faults
Remedial measures
1)
X
X
X
X
Overload Reduce load
X
Interruption of a phase in
the supply line
Check switches and supply lines
X
X
X
X
X
Interruption of a phase in
the supply line after switch-
ing on
Check switches and supply lines
X
X
Supply voltage too low,
frequency too high
Check power supply conditions
X
Supply voltage too high,
frequency too low
Check power supply conditions
X
X
X
X
X
Stator winding incorrectly
connected
Check winding connections
X
X
X
X
Winding short circuit or
phase short circuit in stator
winding
Measure the winding resistanc-
es and insulation resistances,
repair after consultation with
manufacturer
X
Incorrect direction of rota-
tion of axial fan
Check connections
(1) As well as eliminating the cause of the fault (as described under "Remedial
measures"), you must also rectify any damage the machine may have suffered.