12 kv vacuum circuit breaker

SummaryVMDseriesvacuum circuitbreaker is of indoor high voltage switchgear suitable for 12kV.24kv,36kv,40.5kv,three-phase power system with 50Hz frequency in order to protect and control electrical appliances, and especially suitable for frequent operation at rated current or incessant open circuit due to unique advantages of vacuum circuit breaker. VMD3vacuum breaker can be used independently, and also can be applied in central switch cabinet, fixed switch cabinet, and oilless reconstruction, as well as realize complete interchangeability with foreign like products. Technical Parameters The VMD3 is our new generation12 kv embedded pole(assembly pole)kind vacuuum circuit breaker ,We independent developed it as per international standards. All the technical parameters of breaker completely satisfy the Standards Of GB1984 AC Highvoltage Breaker, GB/T 11022 -1999 Common Specifications For High-Voltage Switchgear And Controlgear Standards, China Power Sector Standards DL403. Also meet the requirements of IEC62271-100, IEC56 and other main industrialized countrys similar standardsNOItemUnitTechnical Date1Rated voltagekV122Rated insulating levelRated short time power frequency withstand voltage(1min)42Rated lighting inpulse withstand voltage (peak value)753Rated FrequencyHz504Rated currentA630630125012501250125016001600200020002500250031503150400040005Rated short circuit breaking currentkA202531.5406Rated short time withstand current202531.5407Rated peak withstand current5063801008Rated short-circuit closing current (peak value)50638010094S rated short-time withstand current202531.54010Rated shock steady current50638010011Rated making surge current of capacitor bank12.5(The frequency is less than 1000Hz)12Rated breaking current of single/symmetrical capacitor bankA630/400 (The value shoule be 800/400 while the current is 40kA)13Duration of rated short-circuit currentS414Power frequency withstand voltage of secondary circuitV200015Rated operationl voltageMaking coilAC110/220 DC110/220Breaking coilAC110/220 DC110/220Energy-storage motorAC110/220 DC110/22016Making time (under Rated voltage)ms35-7017Brealing time(under Rated voltage)20-4518Permitted abrasion thickness of moving and fixed contactsmm319Energy storage timesS≤1520Contactor spacemm9± 121Contacting travel3---422Bounce time of Contactor during makingms≤223Different time of breaking / making of 3 phases≤224Average breaking speed 10.9-1.325Average making speed 20.4-0.826Rebound amplitude of contact breakingmm≤327Conductance circuit resistanceμΩ≤50 (630A)≤45(1250A)≤35(1600A-2000A)≤25(More than 2500A)28The contacting pressure of of contactor during makingN2000±200(20kA)2400±200(35kA)3100±200(31.5kA)4750±250(40kA)29Rated operating orderO- 180s -CO-180s-CO/O- 0.3s -CO-180s-CO