FRITSCH PULVERISETTE 5/4 classic line - Manual (Page 18)

2.8.4 Imbalance detection
The device switches off if there is excessive imbalance. (See
Ä Chapter 10 ‘Repairs’ on page 55)
2.8.5 Operation on GFCI (Ground-Fault Circuit Interrupters)
It is possible that the leakage currents will become marginal during oper-
ation. This may trigger the earth leakage circuit breaker. These values
can quickly be reached when all devices are added to the circuit.
Solution: Circuit without an earth leakage circuit breaker or, if possible,
increase the earth leakage circuit breaker threshold.
Safety information and use
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