Wiring according to EM C
Accessories
23
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EDBEMV82EV EN 3.0
3.6 Accessories
3.6.1 Mains choke
A mains choke is an inductor which can be connected into the mains cable of the frequency inverter.
Mains chokes can be used together with RFI filter and / or motor filters.
The mains choke has the following functions:
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Reducing system perturbations
– The curved shape of the mains current is approached to the sinusoidal shape.
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Reducing the mains current
– Reducing the effective mains current (i.e. reducing the mains, cable, and fuse load).
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Improving the service life of the 8200 vector
– Reducing the AC current load on the electrolytic capacitors in the DC bus serves to prolong
their service life.
Note!
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Some 8200 vector frequency inverters must always be operated with a mains
choke, independent of EMC measures.
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When operating with a mains choke the maximum motor voltage does not reach
the value of the mains voltage - typical voltage drop at rated frequency and rated
device current: 6 %.
3.6.1.1 Basic rules for wiring
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Themainschokeiswiredviasinglecorestothemains.
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The cable cross-section must be rated for the assigned fuse protection (EN 50178).
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