... : IEC/EN 60898Function:protection of circuits against short-circuit currents,protection of circuits against overload currents, switch, ... considered: the earthing systems(TNS,TNC),short-circuit current at the circuit-breaker installation point, which must always be ... supply loads with high inrush current at the circuit closing(lv/lv transformers,breakdown lamps). Miniature circuit breaker NB1-D10 3P ...