12kv Alternator Used Vacuum Circuit Breaker

VIB-12F series indoor high voltage alternator vacuum circuit breakerGeneral DescriptionVIB-12F series indoor high voltage alternator vacuum circuit breaker(hereinafter referred to as alternator vacuum circuit breaker) is three-phase AC,50(60)Hz indoor power distribution equipment with 12kV rated voltage.VCB applied one-piece design of operating mechanism and vacuum circuit breaker which can be installed in both KYN28A-12 central alternator switchgear and fixed switchgear.Vacuum circuit breaker can control&protect alternator by used in exit of alternator. Alternator vacuum circuit breaker conforms to GB/T14824-2008 of,and it passed complete type test of standard required system source.Applying ambient conditions and width of matched switchgearAmbient temperature:max +40ºC,min -15ºCThe height above sea leval:≤1000mRelative humidity:daily average relative humidity≤95%,monthly average relative humidity≤90%Saturated vapour pressure:daily average value≤2.2kPa,monthly average value≤1.8kPaFor special applied conditions,please consult with manufacturerWidth of matched switchgear :1000mmMain technical  parameters No.NameUnitData1rated voltagekV122rated frequencyHz50/603rated insulation level1 min power frequency withstand voltagepole to ground,  between poleskV42between port50 rated lighting impluse withstand voltagepole to ground,  between poles75between port854rated currentA1250315040005rated short circuit breaking currentrated thermal stability current(virtual value)kA4040506rated short circuit closing current(peak value)rated dynamic stability current(peak value)kA1101101377rated short-time withstand current durations28DC component of rated short circuit breaking current%759rated out-of-step symmetry breaking currentkA20(DC%≤20%)10rated out-of-step dissymmetric breaking current kA20(DC%≤75%)11rated out-of-step symmetry breaking current(peak value)kA28.335.412rated loading current opening timecycle5013breaking operations of rated short circuit breaking currentcycle514system resource TRVexpected TRV rising ratekV/μs2peak voltagekV22coefficient of first opened phase 1.515rated operating sequence  CO-30min-CO16mechanical endurancecycle10000Mechanical Characteristic parameterNo.NameUnitData1contact clearancemm11±12contact strokemm3.5±0.53contact bouncing duration closing operationms≤24out of simultaneity of  CO operations of three polems≤25average opening speedm/s1.45±0.25(contact opened 6mm)6average closing speedm/s1±0.2(4mm before contact closing)7opening timems20~508closing timems35~709allowed wear thickness of moved and fixed contactmm≤310main circuit resistance of each phaseμΩ≤35(1250A)≤25(3150,,4000A)Overall outline drawing rated current(A)125012504000rated short circuit breaking current(kA)404050matched diameter size of fixed contactφ79φ109matched size of fixed&moving contact is 15~25mm Min,the primary distance between phases is 275mmrecommended matched size of switchgear room is1000mm                                                                            withdrawable type of 275mmOur FactoryOur  CertificatesWelcome for inquiry and factory visit!  /* January 22, 2024 19:08:37 */!function(){function s(e,r){var a,o={};try{e&&e.split(",").forEach(function(e,t){e&&(a=e.match(/(.*?):(.*)$/))&&1