FZN21-12 high voltage vacuum load switch and combinations, for three-phase AC 10kV, 50Hz power system, or in the distribution equipment and ring days switchgear, modular substation and other ancillary uses, can be used as ring network power supply unit or terminal equipment, the distribution of power plays, control and protection. FZN21-12 high voltage vacuum load switch technical performance in accordance with IEC Publication 60265-1 / FDIS "high voltage switches, Part 1: 52kV rated voltage less than 1kV voltage load switch", IEC60420 "high voltage AC load switch - fuse combinations "and CB16926" AC high voltage load switch - fuse combination electric group ", GB3804" 3-63kV AC high voltage load switch "requirement. FZN21-12 high voltage vacuum load switch with breaking capacity, safety and reliability, long life, frequent operation, compact structure, small size, light weight, basically without maintenance. Has a rated breaking current, overload current (FZRN21-12D / T125-31.5 can short-circuit breaking current) and the ability to prevent equipment missing running, the switch has visible isolation fracture, equipped with a closing capacity earthing switch and electric spring institutions can remote remote control.