Initial Inspection; Main Inspection; Bearings And Lubrication - VEM W41 Series Installation, Operating And Maintenance Instructions

Installation, Operating and Maintenance Instructions (Translation)
listed terms represent a general advice for undisturbed operation. Individual local conditions (degree of pollution,
load, etc.) must be taken into account when adjusting these terms.
What to do?
First inspection
Control of air circulation
and surface of motor
Lubrication (as option)

Main inspection

Remove condensate water

12.1 Initial inspection

According to the requirements an initial inspection of the motor must be organised after approximately 500 hours of
operation, but not later than half a year after start of operation.
The following examinations will be done at standstill of the motor:
a) Check of the foundations. There must be no cracks or other damages like depressions.
The following examinations will be done when the motor is running:
a) Check of the electric characteristics.
b) Check of the bearing temperatures. It is examined if the permissible bearing temperatures will be exceeded
during operation of the motor (for standard grease and max. 120°C)
c) Check of the running noises. When the motor is running, it is checked if the quiet running has changed for
the worse.
If the examination results in differences from the values specified in the maintenance manual or if there are other
faults or damages detected, than these must be corrected immediately.
12.2 Main inspection
According to the requirements a main inspection of the motor must be organised annually after approximately
10,000 hours of operation.
The following examinations will be done at standstill of the motor:
a) Check of the foundations. There must be no cracks or other damages like depressions.
b) Check of the motor alignment. The motor alignment must be within the given tolerances.
c) Check of the fastening bolts. All bolts used for fixing mechanical and electrical connections must be tight
(see also the table for tightening torques for bolts in chapter 11. Commissioning).
b) Check of the cables and the insulation material. The examination must check if the cables and used insula-
tion materials are in good conditions. They must not be discoloured or even burnt and they must not be
broken, cracked or faulty in any other way.
c) Check of the insulation resistance. The insulation resistance of the winding must be measured. The re-
quirements in the maintenance manual (chapter 9) must be kept.
d) According to the grease quality and bearing type of the motor it can be necessary to change the grease af-
ter 10,000 working hours (see chapter 12.3 Bearings and Lubrication). Apart from that the necessary lubri-
cation periods for friction bearings must be observed, because they differ from the inspection periods.
The following examinations will be done when the motor is running:
a) Check of the electric characteristics.
b) Check of the bearing temperatures. It is examined if the permissible bearing temperatures will be exceeded
during operation of the motor.
c) Check of the running noises. When the motor is running, it is checked if the quiet running has changed for
the worse.
If the examination results in differences from the values specified in the maintenance manual or if there are other
faults or damages detected, than these must be corrected immediately.

12.3 Bearings and Lubrication

The anti-friction bearings of the motors in standard design are filled with anti-friction bearing grease in the factory
(or with sealed bearings by the bearing manufacturer) according to DIN 51825 in compliance with the table below:
.
VEM motors GmbH-2013
Time period
After about 500 operating hours
Depending on local environmental pollu-
tion
See name plate or lubrication sign
After about 10,000 operating hours
Depending on the local environmental
conditions
20
English
Terms
½ year at the latest
Once a year