circuit breaker ( 24kV, vacuum ,IEC standard )

SummaryVMD series vacuum 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. VMD series vacuum 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 VMD4 series is our new generation 24 kv embedded pole kind vacuuum circuit breaker ,We independent developed it as perinternational standars. 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 voltagekV242Rated insulating levelRated short time power frequency withstand voltage(1min)65Rated lighting inpulse withstand voltage (peak value)1253Rated FrequencyHz504Rated currentA6306301250125012501600200025005Rated short circuit breaking currentkA202531.56Rated short time withstand current202531.57Rated peak withstand current50638084S rated short-time withstand current202531.59Rated shock steady current50638010Rated short-circuit closing current (peak value)50638011Duration of rated short-circuit currentS412Mechanical lifeTimes20000(M2)13Rated making surge current of capacitor bankkA12.5(The frequency is less than 1000Hz)14Rated breaking current of single/symmetrical capacitor bankA630/40015Breaking times at rated short-circuit currentTimes274 times (E2)16Power frequency withstand voltage of secondary circuitV200017Rated operating voltageAC110/220DC110/22018Rated operating orderO-0.3s-CO-180s-CO19Energy storage timesS≤1520Contactor spacemm13± 121Contacting travel4 ± 122Pole distance210 ± 1.5/275±1.523Bounce time of Contactor during makingms≤224Different time of breaking / making of 3 phases≤225Average breaking speedm/s1.1-1.726Average making speed0.6-1.127Making timems≤6028Brealing time≤4529Rebound amplitude of contact breakingmm≤330Permitted abrasion thickness of moving and fixed contacts331Conductance circuit resistanceμΩHandcart wayRated current≤45630-1250A≤351600-2000A≤25more than 2500A