ZN23-40.5 Indoor-Hochspannungs-Vakuum Pause

General ZN23-40.5 indoor high voltage vacuum circuit breaker is used in three-phase AC 50Hz 40.5kV power system to open/close load current, overload current and fault currentfor the electric control equipment in industrial and mining enterprises, power plants and substations. It is also suitable for the places of frequent operation, like arc furnace transformer, high voltage motor and switching capacitor bank, it is not suitable for inflammable and explosive places. The circuit breaker is equipped with electromagnetic operating mechanism and spring operating mechanism. Main technical data No.NameUnitData1Rated voltage kV40.52Rated insulation level 1min power frequency withstand voltage kV95Lightning impulse withstand voltage (peak) 1853Rated current A1250, 1600, 20004Rated short-circuit breaking current kA25, 31.55Breaking times at rated short-circuit breaking current time206Rated short-circuit making current kA63, 807Rated short time withstand current kA25, 31.58Rated operating sequence O-0.3s-CO-180s-CO9Closing time ms≤20010Opening time ms≤6011Rated breaking/making capacitor bank current A40012Mechanical life time600013Operating voltage of DC electromagnetic operating mechanism VDC110, 22014Operating voltage of spring operating mechanism VAC 110, 220; DC 110, 220