The FL(R)N36-12D indoor high-voltage SF6 load switch is an indoor switching device with a rated voltage of 12 kV. It uses SF6 gas as the arc-extinguishing and insulating medium and includes three working positions: closing, opening, and grounding. It features a compact size, easy installation and use, and strong adaptability to various environments.

The FL(R)N36-12D indoor high-voltage SF6 load switch can be combined with other electrical components to achieve control and protection functions. It is suitable for controlling and protecting electrical equipment in industrial and mining enterprises, civil power supply systems, and secondary substations. Among its configurations, the load switch-fuse combination device is particularly compatible with the protection characteristics of Transformers, making it especially suitable for ring main unit power supply systems.

The FLN36-12D/630-20 indoor high-voltage SF6 load switch (hereinafter referred to as the "load switch") and the FL(R)N36-12D/100-50 combination device (hereinafter referred to as the "combination device") comply with the Chinese national standards GB3804 *"AC High-Voltage Load Switches for 3–63 kV"* (equivalent to IEC 60265-1) and GB16926 "AC High-Voltage Load Switch-Fuse Combination Devices" (equivalent to IEC 420).