RUNRACE : Service & Maintenance Manual - rev. 2.0
Page 11.14
WARNING: The above modifications do not significantly influence the tripping of the
automatic circuit breakers, as these are normally calibrated for residual currents of 30
mA, well above the leakage current of the machine under normal conditions. In this case
it may be useful to check that:
• the automatic circuit breaker is connected to only one machine, rather than
protecting the general circuit of the entire machine line. In fact, even though the
leakage currents of the individual machines are low, when many machines are
connected to the same circuit the sum of their leakage currents may exceed the
capacity of the circuit breaker;
• the automatic circuit breaker is in perfect working order, and in particular that the
50 Hz lowpass filter, installed to eliminate high frequency disturbances caused by the
inverter, is operating correctly.
