Molded case circuit breaker is one of the most advanced type breakers in the world, which adopt international advanced design and manufacture technology. The molded case circuit breakers are suitable for the circuit of ac 50/60hz, rated operating voltage up to ac 660v, dc 250v, rated operating current 10-800a. It is for distributing energy of electricity and infrequent switchover in normal conditions. They are provided the functions of the protection against overload, short circuit and under-voltage. The mccb complies with standard of iec60947-2. Carton package