Measures prior to commissioning
Operating_Manual_Fan_KXE_04_en.docx
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Limit values for “pre-alarm” and “disconnection”:
Machinery class
Rated motor
power
Substructure or type
of assembly
Measure
Limit values for
effective velocity v
eff
[kW]
[mm/s]
2 *)
> 15 ≤ 300
Rigid
Pre-alarm
> 2.8
Disconnection
> 4.5
Flexible
Pre-alarm
> 4.5
Disconnection
> 7.1
1
> 300
Rigid
Pre-alarm
> 4.5
Disconnection
> 7.1
Flexible
Pre-alarm
> 7.1
Disconnection
> 11
*) Motors smaller than 15 kW are not listed separately in DIN ISO 10816-3.
They are therefore allocated to machine group 2.
Explanation of terms “rigid” and “flexible”
- Rigid substructure signifies a fan mounted without
vibration damper (e.g. anti-vibration mounts, spring
phonolators)
- Flexible substructure signifies a fan mounted with
vibration damper
Example:
Rated motor power: 90 kW
Assembly:
Anti-vibration mount
Type of assembly:
Flexible
Limit values for vibrations in accordance with Table 8-5 are:
Pre-alarm at
v
eff
> 4.5 mm/s
Disconnection at
v
eff
> 7.1 mm/s
8.9.1 Vibrations
Table 8-5
Vibration limit values in accordance with DIN ISO 10816-3
