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molded case circuit breaker 1.Application NS series mouled case circuit breaker is suitable for short circuit and overload protection for circuit of AC 690V 50/60Hz,rated current from 12.5A to 630A. It takes protect effect when mouse cage motors non-frequent start,breaking off working and protecting overload,short circuit and lacking voltage. 2.Main technical specifications NS mouled case circuit breakers Number of poles 3,4 Rated current(A) In 40 630 65 630 Rated insulation voltage (V) Ui 750 Rated impluse withstand voltage(Kv) Uimp 8 Rated operational voltage(V) Ue AC 50/60Hz 690 DC 500 Type of circuit breaker N H L Ultimate breaking capacity(ka rms) Icu AC 50/60Hz 220/240v 85 100 125 380/415V 36 70 125 440V 35 65 125 500V 30 50 90 525V 22 35 90 660/690V 8 10 50 Service breaking capacity(ka rms) Ics Icu 100 Utilisation category A Durability(C-O cycles) Mechanical 4000 electrical 400V In 1000