Electric motors Size 63 - 225 ATEX / IECEx
Faults
46
2021-05-31
Fault
Possible cause
Remedy
To be
remedied by
◼
Bearing noises
Scoring on inner bearing
ring, e.g. from motor
starting up with bearing
locked
Replace bearing, avoid
vibrations when at a
standstill
Manufacturer
◼
Motor is not running
smoothly
Imbalance due to belt
pulley or coupling
Balance exactly
Manufacturer
Machine fastening
insufficient
Check machine fastening
Qualified
specialist
◼
Motor does not start up
◼
Considerable drop in speed
Load moment too high
Check motor torque and
load moment
Qualified
electrician
Supply voltage too low
Check power supply
conditions
Qualified
electrician
◼
Motor does not start up
◼
Considerable drop in speed
◼
Safety device is triggered
Phase interrupted
Check the mains
connection
Qualified
electrician
◼
Motor does not start up
◼
Motor is too warm
◼
Considerable drop in speed
◼
Safety device is triggered
Incorrect circuit
Adhere to wiring diagram
and type plate
Qualified
electrician
◼
Motor is too warm
◼
Considerable drop in speed
◼
Safety device is triggered
Overload
Adhere to stipulations on
type plate
Qualified
electrician
◼
Motor is too warm
◼
Safety device is triggered
Too many switching
actuations
Observe rated operating
mode
Qualified
electrician
◼
Motor is too warm
Ventilation insufficient
Check cooling air routes,
check direction of rotation
Qualified
electrician
Ventilation ducts soiled
Clean the ventilation ducts Qualified
specialist
◼
Safety device is triggered
Coil or terminal short
circuit
Measure the insulation
resistance
Qualified
electrician
The start-up time has been
exceeded
Check the start-up
conditions
Qualified
electrician
Pos : 8.20 /KN 2006-SM /nL---------- Abschnitts ende ---------- @ 8\mod_1141997892953_0.doc @ 75471