AOLR series residual current action circuit breaker (without over current protection) suitable for use in line AC 50/60Hz,rated current up to 100A. When the person is lectrocuted or the grid leakage current exceeds the specified value, the circuit breaker with the remaining current can quickly cut off the faulty power supply in a very short time to protect the safety of the person and electrical equipment .It can also be started as an infrequent conversion of the line. AOLR series is suitable for industrial, commercial, high-rise and residential applications.