Notes on project planning
Operation at earth−leakage circuit breaker (e.l.c.b.)
5.2
5.2.3

5.2−2
EDSVF9383V EN 7.1−04/2012
5.2.3 Operation at earth−leakage circuit breaker (e.l.c.b.)
 Danger!
The controllers are internally fitted with a mains rectifier. In case
of a short circuit to frame a pulsating DC residual current can
prevent the AC sensitive or pulse current sensitive earth−leakage
circuit breakers from being activated, thus cancelling the
protective function for the entire equipment being operated on
this earth−leakage circuit breaker.
Æ’ For the protection of persons and farm animals (DIN VDE 0100), we
recommend
– pulse current sensitive earth−leakage circuit breakers for plants
including controllers with a single−phase mains connection (L1/N).
– universal−current sensitive earth−leakage circuit breakers for plants
including controllers with a three−phase mains connection (L1/L2/L3).
ƒ Only install the earth−leakage circuit breaker between supplying mains
and drive controller.
ƒ Earth−leakage circuit breakers may trigger a false alarm due to
– capacitive compensation currents flowing in the cable shields during
operation (particularly with long, shielded motor cables),
– simultaneous connection of several inverters to the mains
– the use of additional interference filters.
5.2.4 Interaction with compensation equipment
Æ’ Controllers only consume very little reactive power of the fundamental
wave from the AC supply mains. Therefore, a compensation is not
required.
Æ’ If the controllers are connected to a supply system with compensation
equipment, this equipment must comprise chokes.
– For this, contact the supplier of the compensation equipment.
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