FKN12A-12D pneumatic load switch, FKRN12A-12D series pneumatic load switch-fuse combination electrical appliance, suitable for 12kV and below three-phase distribution system, as transformers, cables, overhead lines and other power equipment control and protection; It is especially suitable for terminal substations and box-type substations of urban and rural networks. It is also suitable for the control and protection of ring network and double radiation power supply unit.

FZN25-12/FZ(R)N25-12D type indoor high voltage vacuum load switch and FZRN25-12D/T200-31.5 type indoor high voltage vacuum load switch-fuse combination electrical appliances are three-phase AC 50Hz, 12kV power distribution system control and protection devices, products without oil, non-toxic, no fire and explosion risk. Widely used in industrial and mining enterprises and urban buildings distribution power stations and other places. The latter has a more reliable protective effect on electrical equipment such as transformers than circuit breakers, and is especially suitable for ring networks, double auxiliary injection power supply units and box-type substations.