... PurposeThe mining explosion-proof(permanent magnet type)high-voltage vacuum power distribution equipment is suitable to coal ... not frequently. The product has four types a,b,c,d to meet the usage ... disjunction primary components are composed of spring high voltage vacuum circuit breaker; 3)with the protective ... DataTypeBGP9L- /3.3GBGP9L- /6GPBG- /10Rated Current(A)50,75,100,150,200,300,400,500,63050 ...