Shaanxi Longxiang Electrical Co., Ltd.  

Product Name: Zn28-12k Fixed Type of Indoor High Voltage Vacuum Circuit Breaker Model NO.: ZN28-12K Certification: VDE, ISO9001-2000, CE, CB, CCC Function: Circuit-Breaker Failure Protection Type: Circuit Breaker Poles Number: 3 Structure: ACB Installation: Fixed Arc-extinguishing Medium: Vacuum Speed: High-Speed Circuit Breaker Operation: Electric Type Breaking Capacity: High Voltage Circuit Breakers Rated Voltage: 12kv Rated Current: 630/1250/1600/2000/2500/3150A Rated Frequency: 50/60Hz Trademark: Longxiang Electric Transport Package: Non-Solid Wooden Case for Export Shipment Specification: IEC: M2-E2-C2 Origin: China Baoji HS Code: 85389000 Product Description ZN28-12KFixedTypeofIndoorHighVoltageVacuumCircuitBreakerGeneralDescriptionZN28A-12fixedtypeindoorHVvacuumbreakerisusedformanykindsofswitchgearlikeXGN2-12(Z).Itiswidelyusedfor12kVvoltagesystemswhichisaccordancewithGB1984-2003standardsStructuralcharacteristics:1.Thisvacuumcircuitbreakeradoptsairinsulation,itcanmeetairdistanceandcreepageundernomalruncondition.2.TheoperatingmechanismcanuseCD17orCT19typemechanism,theoutletcurvehasgoodadaptationfortherequirementsofvacuuminterrupters.Ithashighreliablewithcharacteristicoflonglifeandeasymaintenance.3.Convenientformatchingwithswitchgear;convenientandreliableoperation:compulsivemechanicalinterlockwayisadopted:meetthe"FivePreventions"function. Applyingambientconditions1.Ambienttemperature:-15~+40ºC.2.Theheightabovesealevel:≤1000m(besidesthespecialrequirements).3.Relativehumidity:theaveragehumidityofadayshouldbenomorethan95%;theaveragehumidityofamonthshouldbenomorethan90%.4.Saturatedvaporpressure:theaveragepressureofadayshouldbenomorethan2.2kPa:the averagepressureofamonthshouldbenomorethan1.8kPa.5.Earthquakeintensity:notexceed8degrees.6.Itshouldbeinstalledintheplaceswithoutfire,explosion,seriousfilth,chemicalerosionandviolentvibration. Main Technical SpecificationS.NNameUnitData1Rated voltagekV122Rated frequencyHz50/603Rated currentA630630 1250 16001000100016002000125012502000250031504Rated short circuit breaking current kA 20 25 31.5 405Rated peak withstand current kA 50 63 80 1006Rated short-circuit duration s 47Rated power frequency withstand voltageBetween phases,phase to ground kV 42Between gaps kV 488Rated lightning impulse withstand voltageBetween phases,phase to ground kV 75Between gaps kV 859Rated operating sequenceO-0.3s-CO-180s-COO-180s-CO-180s-CO(40kA)10Rated source voltage of opening and closing circuit V~220/-110;-220/11011Rated breaking current of single capacitor bank A 63012Rated breaking current of bank to bankcapacitor bank A 40013Electrical endurance classCycle 3014Mechanical enduranceCycle 1000015Operating mechanism typeCD17ICD17IICD17IICD17IIICT19ICT19ICT19ICT19II16Clearance between open contactsmm11±117Contact stroke of contacts mm4±118Out simultaneity of CO operation of three poles ms≤219Contact bouncing duration at closing operation ms≤220Closing time ms50~10021Opening time ms20~6022Average closing speed m/s0.6±0.223Average opening speed m/s1.1±0.224Main circuit resistance of each pole μΩ≤40≤40 ≤40 ≤3025DC component 50%(Max.) Overall outline drawing