... authentication situationThe design of the circuit breaker accord with IEC60934 circuit breaker for equipment,GB17701 circuit breaker for equipment and so ... grade 2;Installation category 3.4.Main technical parametersThe circuit breaker type:Number of poles:1P,2P,3P;Current ... /415V;Rated impulse withstand voltage:4KV;rated limit short circuit capacity(see table 2);use classes:A;Overcurrent tripping ...