FZN21-12 Indoor high-voltage vacuum load switch|Hongtuo Transformer Co., Ltd

summary:

FZN21-12 high-voltage vacuum load switch and combination appliance are used in three-phase AC 12kV, 50Hz power distribution system. They have the advantages of compact structure, small size, light weight, long life, strong closing and breaking capacity, safety and reliability. They can be used together with fuse (referred to as combination appliance) to replace the circuit breaker with high cost, and their operation and maintenance are simple and convenient.

Normal use environment:

◇ Sea level ≤ 1000m;

◇ Ambient temperature - 25 ° C~+40 ° C;

◇ Relative humidity: the daily average value of a is not more than 95%, and the monthly average value is not more than 90%; ◇ Places without conductive dust, corrosive gas and water vapor;

◇ Places without fire and explosion hazards;

◇ Places without severe vibration and inclination less than 30.

Structural features:

FZN21-12 load switch and combination appliance are mainly composed of frame, disconnector (or fuse acts as disconnector), vacuum arc extinguishing chamber, grounding switch, operating mechanism, etc.

The product has compact structure, small volume, long service life, strong closing and breaking capacity, and simple operation and maintenance. The vacuum switch is equipped with electric operating mechanism and energy storage spring, which can realize fast closing and opening operation. Isolating switch, vacuum switch and grounding switch are interlocked to prevent misoperation.