WITM1E Series intelligent moulded case circuit breaker(MCCB) is one of new product which draw lessons from international advanced technology. It is fit for ac 50 hz, rated voltage 400 v, rated current in the circuit to 800 A. It is used as a frequent conversion and motor not frequent starting. The product has overload long time delay inverse time, short circuit, short time delay inverse time, short circuit the short time delay time instantaneous and owe voltage, short circuit protection function, it can protect circuit and power equipment from being damaged. Products comply with IEC60947-2 and GB14048.2 standards.