Outdoor HV Vacuum Circuit Breaker(ZW32-12)

ZW32-12 type outdoor high voltage vacuum circuit breaker is 3-phase AC, 50(60) Hz outdoor power distribution equipment with the rated voltage of 12kV. It is mainly used to break and close the load current, over load current, and short circuit current in the electric power system. It fits to be used to protect and control the circuit in substation, mining and industrial enterprises. It also can be used in the frequently operation places such as the rural power network. The product is accordance with GB1984-2003 standard. The ZW32-12G VCB-Isolating switch combination consists of Vacuum circuit breaker body and isolating switch. Main Technical Specification S.NNameUnitData1Rated voltage kV 122Rated frequency Hz50/603Rated current A6304Rated short circuit breaking current kA205Rated short circuit making current kA506Rated peak withstand current kA507Rated short time withstand current kA208Rated short-circuit duration S49Rated power frequency withstand voltage kV42/1min kV34/1min10Lighting impulse withstand voltage Between phases, phase to ground kV7585Between gaps kV11Rated operating sequence 0-0.3s-CO-180S-CO12Electrical endurance class ClassE2(50cycles)13Mechanical endurance CycleclassM11000014Operating mechanism type 15Clearance between open contacts mm9 1 16Contact stroke of contacts mm2 0.517Out of simultaneity of CO operations of three poles ms218Contact bouncing duration at closing operation ms219Closing time ms306020Opening time ms204021Average closing speed m/s0.40.822Average opening speed m/s1.01.423Main circuit resistance of each pole 80