Siemens SIMOTICS DP, Руководство по эксплуатации

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8.6.2 Electrical faults air-cooled machines
Note
When operating the machine with a converter, also refer to the operating instructions of the
frequency converter if electrical faults occur.
Table 8-1 Electrical faults
↓ Motor fails to start
↓ Motor accelerates sluggishly
↓ Humming noise when starting
↓ Humming noise in operation
↓ High temperature rise under load
↓ High temperature rise of individual winding sections
Possible causes of faults Remedial measures
X X Rotor (partially) demagnetized Contact the Service Center.
X X X X Overload Reduce the load.
X Interruption of a phase in the
feeder cable Check the frequency converters and feeder cables.
X X X X Interrupted phase in the feeder
cable after switching on Check the frequency converters and feeder cables.
X X X X Winding short circuit or inter-
phase short circuit in stator wind‐
ing
Determine the winding resistances and insulation resistan‐
ces. Contact the Service Center.
X Converter output voltage too
high, frequency too low Check the settings at the frequency converter and perform
the automatic motor identification.
X External fan is not running Check the external fan and its connections.
X Reduced air intake Check the air ducts; clean the machine.
8.6.3 Mechanical faults
Table 8-2 Mechanical faults
↓ Grinding noise
↓ Radial vibrations
↓ Axial vibrations
Possible causes of faults Remedial measures
X Rotating parts grind Establish the cause and realign the parts.
X Rotor or coupling not balanced. Disconnect the rotor or coupling and rebalance.
If the machine has two shaft ends, and a transmission element is only
fitted to one end, secure the fitted key at the other end to prevent it
from being thrown out. If the rotor has balance type "H" (standard
type), the fitted key must be cut back to roughly half of its length.
Operation
8.6 faults
1FZ shaft height 280
92
Operating Instructions, 02/2022, A5E51698698A