FKN12A-12D gas production load switch, FKRN12A-12D series gas production load switch-fuse combination electric appliance, is a new series of switches and equipment developed by our company. It is suitable for 12KV and below three-phase power distribution system, as transformer, cable and overhead. It is used for the control and protection of power equipment such as lines; it is especially suitable for terminal substations and box-type substations in urban and rural networks. It is also suitable for the control and protection of ring networks and dual radiant power supply units.