Meba isolator circuit breaker MB324C, adopts advanced design technology, it has protective function as shortage as overload, and are used in lighting distribution system industry, commerce and dwelling, and protecting fractional electric motors, and they also have many merits of high protective grade(up to IP20), high breaking capacity, reliable sensitive action, convenient, multiple assembling, long life etc. They are mainly adapted to the circuit of AC 50Hz, 230V in single pole; 400V in double, three, four poles for protecting overload and short circuit, meanwhile they are also used in turning on or off the electric apparatus and lighting circuit under the normal condition.