INSTRUCTIONS AND MAINTENANCE MANUAL
MAC R MOTORS
PAGE:
16
CODE: CTT12 EDITION: 01 DATE: MAY 2013
Subject to technical changes without prior notice
3.3.5
Balancing and vibration level
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
Assembly
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
Rigid mount
21
1.3
2
29
1.8
2.8
B
Free
suspension
11
0.7
1.1
18
1.1
1.7
Rigid mount
14
0.9
1.4
Table 8: Vibration levels
If the machine does not specify the type to which it belongs, it must be considered as type ‘A’.
