FN12-12 Series AC HV Load Switch is a kind of three phase high voltage switch apparatus, suitable for 12kV rated voltage, 50Hz rated frequency alternative current.

It is mainly used in downtown power distribution station and industrial electric equipment of three phase ring main unit electricity circle or terminal power supply, for breaking olading current, overload current, and short-circuit current, and as a combination electric apparatus for breaking and closing short circuit current. This switch shall be fitted with special operative mechanism. (manual or electrical operation).