Product Name: Zn28 Vs1 Vacuum Interrupter for Td 1250/12-20 Model NO.: 208D Certification: ISO9001-2000, CQC Function: Vacuum Type: Vacuum Poles Number: 3 Structure: Vacuum Installation: Fixed Arc-extinguishing Medium: Vacuum Speed: High-Speed Circuit Breaker Operation: Energy-storage Type Breaking Capacity: High Voltage Circuit Breakers Warranty: 12 Month Rated Voltatge: 12kv Rated Current: 630 Rated Short-Circuit Breaking Current: 20ka Mechanical Life: 20000 Times Shelf Life: 20 Years Trademark: ZGVE Transport Package: Standard Export Packing. Specification: Vacuum Origin: Wenzhou HS Code: 8538900000 Product Description ZN28 VS1 Vauum Interrupter For TD630/12-20Main Technical DataMainTechnicalDataRatedVoltage12kVRatedCurrent1250ARatedFrequency50HzRatedShort-timepowerfrequencywithstandvoltage(1min)42kVRatedLightingimpulsewithstandvoltage75kvRatedshort-circuitbreakingcurrent25kARatedshort-circuitmakingcurrent(peak)63kABreakingoperationsofratedshortcircuitbreakingcurrent30timiesRatedsiglecapacitorbankbreakingcurrent400ARatedshort-timewithstandcurrent25kARatedpeakwithstandcurrent50/63kARateddurationofshort-circuit4sMechanicalife20000timesContactclosingforceduetobellowsandatmosphere80±40NCounterforceatratedcontactstroke120±50NCircuitresistanceatratedcontactforce≤25μΩShelflife20yearsContacterosionlimit3mmWeightofmovingparts≤1.3kgMechanicalDataRequiredformatchedvacuumswitchgearRatedcontactstroke10±1mmAverageopeningspeed1.0±0.25m/sAverageclosingspeed0.65±0.15m/sAddedcontactforce2000±100NContactbouncingdurationatclosingoperation≤2msContactbouncingbankamplitudeofopeningoperation≤2mmThree-polesimultaneity≤1msDimensional Drawing