7 Servicing/Maintenance
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KSB IE3-Motor
–
If mechanical operation does not improve after the motor is switched off, it
can be assumed that the cause is mechanical, e.g. unbalance of the electric
motor or the driven machine, poor alignment between the motor and the
driven machine or operation of the motor at system resonance (system =
motor + base frame + foundation, etc.)
–
If mechanical operation of the motor is OK, switch on the cooling
equipment, if any, and continue to observe the motor for a while as it runs
under no-load conditions.
–
If the motor continues to operate satisfactorily, restore the motor load.
Check running characteristics and read and log values for voltage, current
and output. Also read and log relevant values of the driven machine if
possible.
▪
Monitor and log temperatures of the bearings, windings, etc. until the steady
state has been reached by using whatever measuring devices are available.
▪
Check the effectiveness of the cooling system for frequent starting or braking, or
if the operating speed continually changes below the nominal speed.
7.2.2 Inspection
Initial inspection
Inspection interval
After about 500 operating hours, or 6 months at the latest
Procedure
Check the following during operation:
▪
The specified electrical characteristics are complied with.
▪
Permissible temperatures at the rolling element bearings are not exceeded.
▪
The smooth running characteristics and running noise of the drive have not
deteriorated.
When the drive is at a standstill, check:
▪
If the foundation is free from depressions or cracks.
Immediately correct impermissible deviations that are detected during inspection
work.
NOTE
Further inspections/tests may be required in accordance with the additional
operating manuals or in accordance with the particular system-specific conditions.
General inspection
Inspection interval
Once annually
Procedure
Check the following during operation:
▪
The specified electrical characteristics are complied with.
▪
Permissible temperatures at the rolling element bearings are not exceeded.
Check the following when the drive is at a standstill:
▪
The foundation is free from depressions or cracks.
▪
The drive alignment is within the specified tolerance.
▪
All the fastening bolts/screws for the mechanical and electrical connections have
been securely tightened.
▪
The insulation resistances of the windings are sufficient.
▪
Cables and insulating parts are in good condition and there is no evidence of
discolouring.
Immediately correct impermissible deviations that are detected during inspection
work.