ZN85-40.5/(3AV3)Series Indoor AC HV Vacuum Circuit

General ZN85-40.5 (3AV3) series indoor AC high voltage vacuum circuit breakers are suitable for three-phase 50Hz 40.5kV system to open/close load current, overload current and fault current in industrial and mining enterprises, power plants and substations, and the places of frequent operation. Main technical data No. NameUnitData1Rated voltage kV40.521min power frequency withstand voltage (rms) kV953Lightning impulse withstand voltage (peak) kV1854Rated frequency Hz505Rated current A1250, 1600, 20006Rated short time withstand current (4s) kA25, 31.57Rated peak withstand current (peak) kA 63, 808Rated short-circuit duration s49Rated short-circuit breaking current kA25, 31.510Rated short-circuit making current kA63, 8011Rated operating sequence O-0.3s-CO-180s-CO12Breaking time ms<8013Breaking times at rated short-circuit breaking current time2014Rated capacitor bank breaking current A63015Rated operating voltage VAC/DC 110, 22016Mechanical life time10000