Maintenance
9.2 Inspection and maintenance
1LE7 shaft heights 71 ... 315
Operating Instructions, 04/2022, A5E51689275A-AA
91
Damage from foreign bodies in the motor
Foreign bodies such as dirt, tools or loose components can be left by accident inside the
motor after maintenance is performed. These can cause short circuits, reduce the
performance of the cooling system or increase noise in operation. They can also damage the
motor.
•
Ensure that no foreign bodies are left in or on the motor.
•
Securely attach all loose parts once you have completed the work.
•
Carefully remove any dirt.
9.2.2
Inspections in the event of faults
Natural disasters or unusual operating conditions, such as overloading or short circuit, are
faults that overload the motor electrically or mechanically.
Immediately perform an inspection after such faults.
Note
Inspection specifications
•
Carefully comply with the relubrication intervals for rolling bearings that deviate from the
inspection intervals.
•
When servicing a three-phase motor, it is generally not necessary to dismantle it. The
motor only has to be dismantled if the bearings are to be replaced.
9.2.3
First inspection after installation or repair
Perform the following checks after approximately 500 operating hours or at the latest six
months after commissioning:
Table 9- 1
Checks after assembly or repair
Check
When the motor is running At standstill
The electrical parameters are maintained.
X
The permissible bearing and winding temperatures are
not exceeded (Page 76).
X
The smooth running characteristics and motor running
noise have not deteriorated.
X
The foundation has no cracks or indentations. (*)
X
X
(*) You can perform these checks while the motor is running or at a standstill.
Additional tests may also be required according to the system-specific conditions.
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.
