Vacuum Interrupter (ZKBD-630/12-20TYPE) ZKBD type vacuum switch pipe adopts high oxidize glass make insulation shell and pipe make medium with high vacuum, so, its volume little, endure high voltage and minute break ability the strong length of service life , Chu head need not repair , especially because of its electric arc not outside dew, safe reliable advantage, is coal, power, chemical engineering, metallurgy, weaving and high-rise building etc. profession place extensive adopting. this product match with suitable hold motivation Gou, may assemble close the business flow out the circuit breaker of high voltage , happen as three-phase exchange , power supply system in distribution and motor concentration control equipment. Technical parameter Specified voltage 12KV The specified withstand current of peak value 80KA Specified Chu the contact resistance under first pressure ≤30μΩ Specified working current 1250, 1600A Is specified Work frequency withstand voltage 42KV Chu the first thickness of permissible wear 3mm The specified switched current of short circuit 25,31.5KA Specified is short withstand current 31.5KA The 20 years of storage life Specified current Break open Frequency 30Frequency Specified is short endure by time 4S Match to use circuit breaker ZN28-12type Specified impact withstand voltage 75KV Chu head from close force 190+_40N The specified barrier of short circuit joins current 80KA Specified open rules take off Chu head turn over force 240+_40N