NORD Drivesystems BU0750 - Manual (Page 150)

NORDAC SK 750E Manual
150 Subject to technical amendments BU 0750 GB-3311
10.6 Maintenance and servicing information
10.6.1 Maintenance Instructions
In normal use, NORDAC SK 750E frequency inverters are maintenance free. Please note the "general data" in
Section 9.1.
Dusty environments
If the frequency converter is being used in a dusty environment, the cooling surfaces should be regularly
cleaned with compressed air. If air intake filters have been built into the control cabinet, then these should also
be regularly cleaned or replaced.
Long-term storage
The frequency inverter must be connected to the supply network for at least 60 min at regular intervals.
If this is not done, there is a danger that the device may be destroyed.
If a device is to be stored for longer than one year, it must be recomissioned with the aid of an adjustable
transformer before normal connection to the mains.
Long-term storage for 1 - 3 years
30 min with 25% mains voltage
30 min with 50% mains voltage
30 min with 75% mains voltage
30 min with 100% mains voltage
Long-term storage for >3 years or if the storage period is not known:
120 min with 25% mains voltage
120 min with 50% mains voltage
120 min with 75% mains voltage
120 min with 100% mains voltage
The device must not be subject to load during the regeneration process.
After the regeneration process, the regulations described above apply again (at least 60 min on the mains
1x per year).