S series Moulded Case Circuit Breaker is suitable for short circuit & overload protection in the circuit of 690VAC 50/60Hz, rated current from 12.5 to 630A. Its rated insulation voltage is 690V. It can make & break non-frequentiy the circuit in the normal conditions. It takes protective effect when mouse cage motors non-frequent start, breaking off working and protecting overload, short circuit and lacking voltage. It conforms to IEC60947-2.