VIB -12 series of indoor high voltage vacuum circu

VIB series vacuum circuit breaker has taken into consideration of reliable interlock function which can be frequently operated at the rated current and with the capability of many times operations of breaking short-circuit current and fault current. This series of vacuum circuit breaker is an integrated unit by adopting the front and rear arrangement between operating mechanism and vacuum interrupters. It can be used for fixed installation unit and also can be used for independent track by equipped with Chassis. MainTechnicalSpecification S.N Name Unit Data 1 Ratedvoltage kV 12 2 Ratedcurrent A 630 10001250 1600200025003150 3 Ratedshortcircuitbreakingcurrent kA 20 25 20 25 31.5 31.5 40 4 Ratedpeakwithstandcurrent kA 50 63 50 63 80 80 100 5 Ratedshorttimewithstandcurrent kA 20 25 20 25 31.5 31.5 40 6 Ratedshortcircuitmakingcurrent kA 25 63 25 63 80 80 100 7 Switchingoperationofshortcircuitswitchingcurrent Cycle 50 30 8 Ratedoperatingsequence 0-0.3s-CO-180s-CO,0-180s-CO-180s-CO(40kA) 9 Mechanicalendurance Cycle 10000 10 Ratedbreakingoperationsoftheratedcurrent Cycle 20000 11 Ratedlightningimpulsewithstandvoltage(fullwave) kV 75 12 Ratedpowerfrequencywithstandvoltage kV/min 42 13 Contactstroke mm 111 14 Overtravelofcontacts mm 40.5 15 Closingspeed m/s 0.60.2 16 Openingspeed m/s 1.00.2 17 Contactbouncingdurationatclosingoperation ms 2 18 Simultaneityofthreephaseclosingandopening ms 2 19 Closingtime ms 75 20 Openingtime ms 65 21 Distancebetweenphases mm 150,210,275(40kA)