ZFN21-12D/T630-20 Indoor Vacuum Load Switch Fuse Combiner

ZFN21-12D/630-20, ZFN21-12DR/T125-31.5 high-voltage vacuum load switch and combination apparatus are used in three-phase AC 10KV, 50Hz power distribution system. It has the advantages of compact structure, small volume, light weight, long service life, strong making and breaking capacity, safety and reliability, etc. It can be used in combination with fuses (referred to as combination appliances) to replace circuit breakers with high cost, and its operation and maintenance are simple and convenient.

□ Operating environmental conditions

The altitude shall not exceed 1000m;

Ambient temperature: - 25 ℃~+40 ℃;

Relative humidity: daily average value is not more than 95%, and 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 violent vibration and inclination less than 3 degrees.

ZFN21-12 load switch and combination appliance are mainly composed of frame, disconnector (or fuse as disconnector), vacuum switch tube, grounding switch, operating mechanism, etc.

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

1. Frame 2, disconnector 3, fuse 4, insulating rod 5, upper bracket 6, arc extinguishing chamber

7. Grounding knife static contact 8, insulator 9, grounding knife 10, grounding spring 11, opening spring

12. Insulating pull rod 13, main shaft 14, tripping mechanism 15, auxiliary shaft 16, linkage pull rod

17. The load switch of the operating mechanism has no fuse (Item 3) and tripping mechanism (Item 14)