VBST1A-12 Side Mount Type Indoor HV Vacuum Circuit

VBST1A-12 Side mount Indoor typeHV Vacuum Circuit Breaker is a kind of indoor high-voltage switchgear,which applies to the triphase electric system of rated pressure 12kV,rated frequency 50HZ,as a protecting and controlling machine.Because of the advantage of vacuum breaker,it applies specially to the situation of frequent operation under rated currrnt or the situation of frequent opening short current. VS1 Side mount Indoor HV Vacuum Circuit Breaker is mainly used in fixed switch cabinet.This breaker can be used alone and also can be used in network power supply and all kinds of non-standard powersupply system. Main technical parameterCodeItemUnitDate1Rated voltagekV122Rated currentA63012503Rated frequencyHz504Rated insulation level1 min power frequency withstand voltagekV42(interphase)48(gap)5rated lightning impulse withstand voltagekV75(interphase)85(gap)6Rated short –circuit breaking currentkA2531.574S rated short- time withstand currentkA2531.58Rated peak withstand currentkA63809Rated short-circuit making current(peak)kA638010Operating sequence of automatic reclosingO-0.3s-CO-180s-CO11Energy storage timems≤1512Rated short-circuit breaking current breaking timestime3013Mechanical lifetime2000014Clearance between open contactsmm10±1.515Overtravel of contactsmm3.5±0.516Contact closing bounce timems≤317Three phase opening asynchronyms≤218Opening speedm/s1.2±0.319Closing speedm/s0.7±0.220Opening timemm≤5021Closing timemm≤10022Resistance of main circuitRated current:630AμΩ≤5023Rated current:1250A≤4024Center distance apartmm210±2