FL (R) N36-12/24 (D) type sulfur hexafluoride load switch is suitable for three-phase AC 50Hz, rated voltage 12kV/24kV ring network power supply or double radiation power supply systems. It is used to close and open load current and overload current. It can also be used to close and open no-load long lines, no-load transformers and capacitor banks, etc. The series combination of load switch and current-limiting fuse can replace the function of circuit breaker. That is, the load switch is responsible for closing and opening various load currents, while the current-limiting fuse is responsible for opening large overload currents and circuit-breaking currents. The FLN36-12/24D sulfur hexafluoride load switch and the FLRN36-12/24D sulfur hexafluoride load switch with fuse combination electrical apparatus possess control and protection functions. They can be used for the protection and control of power supply and transformation equipment, and are particularly suitable for ring main units, cable branch boxes and distribution substations.