ZN28-12C Series of Withdrawable HV Indoor Vacuum C

ZN28-12(C) withdrawable type indoor HV vacuum circuit breaker can be matched with switchgear JYN2-12 (Z). It is widely used for 12kV voltage systems which is accordance with GB1984-2003 standards. Products include: Vacuum circuit breaker truck, isolation truck, PT truck, Measurement truck and truck for substation. Structural characteristics: 1. This vacuum circuit breaker adopts air insulation; it can meet air distance and creepage under normal run condition. 2.The operating mechanism can use CD17 or CT17 type mechanism, the outlet line has good adaptation for the requirements of vacuum interrupters. It has high reliable with characteristics of long life and easy maintenance.Main Technical SpecificationS.NNameUnitData1Rated voltage kV122Rated frequency Hz50/603Rated current A630100012506301000125012051600200016002000250031504Rated short circuit breaking current kA202531.5405Rated peak withstand current kA5063801006Rated short-circuit duration S47Rated power frequency withstand voltage Between phases, phase to ground kV42/1minBetween gaps kV48/1min8Rated lightning impulse withstand voltage Between phases, phase to ground kV75Between gaps kV859Rated operating sequence 0-0.3s-CO-180s-CO0-180s-CO-180s-CO(40kA)10Power source voltage of opening and closing circuit V220/110;-220/11011Rated breaking current of single capacitor bank A63012Rated breaking current of back to back capacitor bank A40013Electrical endurance class ClassE130cycles14Mechanical endurance CycleclassM11000015Operating mechanism type CD17 ICD17 IICD17 IICD17 IIICT17 IICT17 IICT17 IICT17 III16Clearance between open contacts mm11 117Contact stroke of contacts mm4 118Out of simultaneity of CO operations of three poles ms219Contact bouncing duration at closing operation ms220Closing time ms5010021Opening time ms206022Average closing speed m/s1.1 0.223Average opening speed m/s0.6 0.224Main circuit resistance of each pole 40404030