Siemens 1PH813 - Bearing Replacement Intervals; Cleaning the Fan (Forced Ventilation)

Maintenance
9.1 Inspection and maintenance
Synchronous/induction motors 1PH813
Operating Instructions, 04/2009, 610.48000.22
67
9.1.7 Bearing replacement intervals
The bearings are subject to wear and must be replaced after a defined number of operating
hours. The recommended bearing replacement intervals t
LW
are listed in the following table.
The lifetime can be extended if the motor is operated under favorable conditions (e.g. low or
medium speeds, low radial forces (transverse forces), vibration load).
NOTICE
Harsh operating conditions
If the motor is subject to harsh operating conditions (e.g. continuous operation at n
max
, high
vibration/shock loads, frequent reversing duty etc.), the bearing replacement intervals t
LW
can decrease by up to 50%.
Table 9- 2 Recommended bearing change interval t
LW
Bearing version
Standard Advanced lifetime Performance High performance
Motor type
n
m
[1/min] n
max
[1/min] n
m
[1/min] n
max
[1/min] n
m
[1/min] n
max
[1/min] n
m
[1/min] n
max
[1/min]
1PH813□ < 6500 8000 < 2500 4500 < 8500 10000 < 10000 15000
t
LW
[h] 20000 12000 40000 30000 12000 8000 12000 8000
Q

W

Q

W

 Q
L
W
L

Q
P
1PH8 motors require special bearings, which can be obtained via the Siemens Service
Center.
9.1.8 Cleaning the fan (forced ventilation)
The fan in the forced ventilation unit is maintenance free due to the use of special bearing
grease. If the fan blades need to be cleaned, however, the following must be taken into
account:
DANGER
Danger of shearing
When carrying out maintenance work on the forced ventilation unit (e.g. cleaning the fan
blades), make sure that the fan is at a standstill, the power for the forced ventilation unit is
shut down, and that steps have been taken to ensure that it cannot be switched on again
during the course of maintenance work.
CAUTION
Avoid the effects of excessive force
If excessive forces are present, this can damage the fan blades.