Siemens SINAMICS S120 Configuration Manual page 44

Mechanical properties of the motors
3.3 Bearing design and service life
Bearing change interval (t
The values specified in the following table are valid for:
● Single and duplex bearings
● Cooling water temperature +30 °C
● Horizontal mounting position
Table 3- 6 Bearing change interval
SH Duplex bearing (standard)
100 n < 2500
m
132 n < 2000
m
160 n < 1500
m
t [h] 16000
LW
n = average operating speed [rpm]
m
t = bearing change interval; grease change interval = 0.8 • t
LW
Maximum speed n
max
The motor must not exceed the maximum speed n
continuously. The speed must be reduced in accordance with the following duty cycle:
If the speed n
rings, press fits etc. It should be ensured that higher speeds are not possible by
appropriately designing the control or by activating the speed monitoring in the drive
system.
The motor may operate at the maximum permissible continuous speed n
without speed duty cycles. This speed depends on the bearings and shaft height.
Table 3- 7 Maximum permissible speed and maximum permissible continuous speed
SH Duplex bearing
[rpm]
n
max
100 7500
132 6700
160 5300
44
) and grease change interval
LW
2500 < n < 6000 n
m m
2000 < n < 5500 n
m m
1500 < n < 4500 n
m m
8000
and maximum continuous speed n
Duty cycle for a 10-minute cycle
3 min n
max
6 min 2/3 n
max
1 min Standstill
CAUTION
is exceeded, this can result in damage to the bearings, short-circuit end
max
Single bearing (option K00)
[rpm]
n n
s1 max
5600 9000
5200 8000
4000 6500
Single bearing (option K00)
< 4000 4000 < n < 7000
m
< 3500 3500 < n < 6500
m
< 3000 3000 < n < 5000
m
20000 10000
LW
s1
max
Bearing for increased speeds (option L37)
n
s1
6500
6000
4500
Configuration Manual, (APH4S), 08/2008, 6SN1197-0AD64-0BP1
Bearing for increased speed
(option L37)
n ≤ 8000 8000 < n
m
n ≤ 6000 6000 < n
m
n ≤ 5000 5000 < n
m
16000
, nor may it operate at n
continuously
S1
[rpm]
n
max
12000
10000
8000
1PH4 Induction Motors
< 12000
m
< 10000
m
< 8000
m
8000
max
n
s1
10000
9250
7000