Our factory since the beginning of the 1985s has produced vacuum interrupters.The VI production line has more than 160 workers .We have 12 advanced brazing furnace,and vacuum degree tester,power frequency withstand voltage tester,lightning impulse withstand voltage tester,machinery parameter tester (closing force due to bellow and atmosphere,force required to hold contacts open at full stroke,line loop resistance).All produces have passed the ISO9001-2000 international quality certification.The annual production capacity of VI comes up to 320,000 units.Last year we have producted 160,000 units VI and sale over 17,000,000USD.