... 2,Instantaneous resetting; 3,selectalbel current P-QM hydraulic magnetic circuit breaker is used in AC 230/400V or DC 80V ... of 0.5-50A,provide protection from overload,short-circuit,also could be used to make and break the ... breaker could be widely used for equipments provide protection of circuit,power equipment,communication equipment,railway transportation system,telecommunications systems,medical ...