1.The breaker is suitble to serve in the power distribution system for lighting and motor. 2. It mainly functions as overload and short-circuit protection in the line of single-pole of 230v and two-pole , three-pole, four-pole of 400v with rated frequency of 50Hz or 60Hz,rated current up to 63A, 3.Also for unfrequent making and breaking electrical apparatus and lighting circuit under notmal condition.