Residual current circuit breaker

Servo drives with a built-in mains filter may exhibit a small leakage current due to the capacitors in the filter. This fault current may cause malfunctions of standard residual current circuit breakers. Therefore, use so-called AC/DC-sensitive residual current circuit breakers type B, in which DC current is also accounted for. Beckhoff recommends residual current circuit breakers with switch-on delay.