Electric ratings: a. AC: up to 63A, AC230/400V, AC50/60Hz; b. DC: up to 63A, DC110V/1P, ... the circuit-breaker installation point, which must always be less than the breaking capacity of this device, network normal voltage.tripping curves ... the circuit closing(lv/lv transformers,breakdown lamps). Miniature circuit breaker NB1-D10 3P UL certificated