FRITSCH PULVERISETTE 7 premium line - Manual (Page 23)

NOTICE!
Fritsch mills are speed controlled. The devices are equipped
for this with frequency converters. In order to comply with
the EMC directive, many measures must be taken to pre-
vent operational transient emissions.
The possible leakage currents resulting from filtering meas-
ures can trigger a conventional residual current circuit
breaker in the mains line. This is no defect!
To prevent this, special residual current circuit breakers,
which are adapted for operation with frequency converters,
are commercially available.
Operation without a residual current switch is possible, but
must be done in accordance with the relevant regulations.
Installation
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