OPERATION AND MAINTENANCE MANUAL
ID MOTORS
PAGE: 17
CODE: CTT52 EDITION: 03 RELEASE: APRIL 2019
Subject to technical changes without prior notice
Balancing and vibration level
3.3.5
The EN 60034-14 standard specifies the test procedures for the acceptance of vibration at factory and the vibration limits for
certain electrical machines in specific conditions when they are disconnected from a power machine or charge
The standard defines two possible vibration levels for the shaft: type ‘A’ (machines with no special vibration requirements); and
type ‘B’ (machines with special vibration requirements).
The following table shows the maximum admissible limits for displacement, speed and acceleration (in effective value) for a
specific shaft height (H):
Vibration
level
Shaft
height
(mm)
56 ≤ H ≤ 132
132
˂
H ≤ 280
H
˃
280
Assembly
Displacement
µm
Speed
mm/s
Accel.
m/s
2
Displacement
µm
Speed
mm/s
Accel.
m/s
2
Displacement
µm
Speed
mm/s
Accel.
m/s
2
A
Free
suspension
25
1.6
2.5
35
2.2
3.5
45
2.8
4.4
Rigid mount
21
1.3
2
29
1.8
2.8
37
2.3
3.6
B
Free
suspension
11
0.7
1.1
18
1.1
1.7
29
1.8
2.8
Rigid mount
14
0.9
1.4
24
1.5
2.4
Table 8:
Vibration levels
If the machine does not specify the type to which it belongs, it must be considered as type ‘A’.
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