Fn12-12 series indoor high-voltage load switch and fn12-12r series indoor high-voltage load switch fuse combination appliance are applicable to 12kV and below three-phase distribution system as control and protection of transformers, cables, overhead lines and other power equipment; It is especially suitable for terminal substations and box substations of urban and rural power networks. It is also applicable to the control and protection of ring network and dual radiation power supply unit.

Fn12-12 series indoor high voltage load switch can open and close load current and overload current.

Fn12-12r series indoor high-voltage load switch fuse combination can open and close load current, overload current, open circuit short-circuit current.