Safety information
page 14
ELTROPLAN-REVCON
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A standard fault-current circuit breaker (sensitive on peak currents) is not
allowed to be used as the only protective measure when using controller
and power feedback unit Caused by a DC-component in the mains current
a controller with 3-phase input voltage may prevent a fault-current circuit
breaker from tripping in case of a earth fault. In accordance with VDE
0160 a fault-current circuit breaker is not allowed to be used as the only
protective measure. In dependence on the kind of network (TN, IT, TT)
further protective measures in accordance with VDE 0100 part 410 are
necessary. For a TN-network this may be an over current protection, for a
IT-network a insulation supervision with pulscode-measurment. For all
kind of networks protective insulation (-transformer) may be used, if re-
quired power and length of wires allow that. When selecting a fault current
circuit breaker the following measures have to be considered:
♦
The fault current circuit breaker has to be compliant with the VDE
0664 standard.
♦
The tripping current should be 300mA or more, to prevent a prema-
ture tripping caused by the leakage current of the controller. In de-
pendence on the load, the length of the motor cables and the usage of
a RFI-filter the leakage current may even be much higher.
Faults current circuit breaker, which are sensitive to all kinds of leakage
currents, grant a good protection and are suitable as the only protection
measurement for one ore three phase controllers. The connection instruc-
tions of the manufacturer has to be observed.
