CDA3000 Operation Manual
3-7
3 Electrical installation
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Mains filters
Note the following points:
• Only all-current sensitive fault current breakers suitable for inverter
operation may be used.
• Switching the mains power: Cyclic power switching is permitted
every 60 seconds; jog mode is not permitted.
− If switching is too frequent, the device protects itself by means
of high-resistance isolation from the system.
− After a rest phase of a few minutes the device is ready to start
once again.
• TN network and TT network: Permitted without restriction.
• IT network (insulated center point): Not permitted!
− In the event of a ground fault the voltage stress is around twice
as high, and creepages and clearances to EN50178 are no
longer maintained.
Size power stages Mains filters
BG1 ... 4 0.37 ... 7.5 kW Internal
BG5 ... 8
11 ... 90 kW External
1)
1) For supplementary components see CDA3000 Order Catalogue.
Note:
Compliance with the limit curves to attenuate the line-borne interference
voltage and the interference emitted from the inverter depends on
• use of a line choke (recommended)
• the length of the motor cable and
• the pre-set clock frequency (4, 8 or 16 kHz) of the inverter power
stage.
For further information please contact your project engineer.
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