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In part 3 of ISO 10816, revised in 2009, the zone borders are specified for vibration
severity of machines with a power of 15 kW to 50 MW ( 2).
Machine type
Large machines with
300 kW to 50 MW
Medium sized ma-
chines with 15 to 300
kW
Electric motors with a
shaft height above 315
mm
Electric motors with a
shaft height between
160 and 315 mm
Foundation
flexible
rigid
flexible
rigid
v
ef
f
1
0
–
1
00
0
H
z
> 11 mm/s
D
D
D
D
> 7.1 mm/s
C
D
D
D
> 4.5 mm/s
B
C
C
D
> 3.5 mm/s
B
B
B
C
> 2.8 mm/s
A
B
B
C
> 2.3 mm/s
A
B
B
B
> 1.4 mm/s
A
A
A
B
< 1.4 mm/s
A
A
A
A
D Risk of machine damage
C Restricted operation
B Unrestricted long-term operation possible
A Newly commissioned
Table 2: Vibration Severity classification in accordance with ISO 10816-3
21
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