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Maintenance
9.2 Inspection and maintenance
9.2.4
General inspection
Check that the installation conditions are observed. We recommend that the following checks
are performed after approx. 16 000 operating hours or at the latest after two years:
Table 9- 2
Checking
The electrical parameters are maintained
The permissible bearing temperatures are not exceeded
The smooth running characteristics and motor running noise
have not deteriorated
The foundation has no cracks or indentations. (*)
The motor is aligned within the permissible tolerance ranges
All the fixing bolts/screws for the mechanical and electrical con-
nections have been securely tightened
All the potential connections, grounding connections and shield
supports are correctly seated and properly bonded
The winding insulation resistances are sufficiently high
Any bearing insulation is fitted as shown on the plates and labels
The CABLES and insulating parts and components are in good
condition and there is no evidence of discoloring
(*) You can perform these checks while the motor is at standstill or, if required, while running.
NOTICE
Motor damage
When carrying out the inspection, if you detect any impermissible deviations from the
normal state, you must rectify them immediately. They may otherwise cause damage to the
motor.
9.2.5
Assessing the rolling bearings
To assess the rolling bearings, it is generally not necessary to dismantle the motors. The
motor only has to be dismantled if the bearings are to be replaced.
The state of a rolling bearing can be assessed by analyzing the bearing vibration. The
measured values provide an indication and can be assessed by specialists. In this case, please
contact the Service Center.
92
Checks that have to be performed during the general inspection
When the mo-
tor is running
X
X
X
X
1LE7 shaft heights 71 ... 315
Operating Instructions, 04/2022, A5E51689275A-AA
At standstill
X
X
X
X
X
X
X
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