Summary

ZFN21-12D/T630-20, ZFN21-12DR/T125-31.5 high voltage vacuum load switch and electric distribution system for three-phase AC 12KV, 50Hz, has the advantages of compact structure, small volume, light weight, long service life, has shut off ability, safe and reliable, and with the use of fuses (referred to as the combination of electrical appliances), circuit breaker can replace high cost the operation and maintenance is simple and convenient.

Model meaning

Use of environmental conditions

Altitude is less than 1000m:

The ambient temperature is -25 C ~+40 C;

Relative humidity: the average daily value is not more than 95%, and the monthly mean value is not more than 90%.

A place without conductive dust, corrosive gas and water vapor;

Places without fire and explosion hazards;

A place where there is no violent vibration and the inclination is less than 3 degrees.

Technical parameters of load switch

Structural features, performance (and configuration size, figure)

FZN21-12 type load switches and combination appliances are mainly composed of frames, isolating switches (or fuses as isolating switches), vacuum interrupters, grounding switches and operation mechanisms.

This product is compact in structure, small in size, long in life, strong in closing and breaking, and easy to operate and maintain. The vacuum switch is equipped with an electric operating mechanism and a energy storage spring. The isolation switch, the vacuum switch and the grounding switch are interlocked with each other to prevent misoperation.