FZN21-12DR/T125-31.5 indoor vacuum load switch fuse combination device

Overview

This type of high-voltage vacuum load switch and combination device is suitable for use in three-phase AC 10kV, 50Hz power systems, or in conjunction with complete distribution equipment and ring network switchgear, combination substations, etc. It is widely used in urban network construction and renovation projects, industrial and mining enterprises, high-rise buildings, and public facilities. It can be used as a ring network power supply or terminal, playing a role in the distribution, control, and protection of electrical energy. The technical performance of this product complies with the provisions of IEC publications 60265-1/FDIS "High voltage load switches, Part 1: High voltage load switches with rated voltage above 1kV and below 52kV", IEC60420 "High voltage AC load switches fuse combination devices", GB16926 "AC high voltage load switches fuse combination devices", and GB3804~63kV "AC high voltage load switches".

This product has the advantages of high breaking capacity, safety and reliability, long electrical life, frequent operation, compact structure, small size, light weight, and basically no need for maintenance. The switch has the ability to break rated current and overload current (FZN21-12DR/T125-31.5), which can break short-circuit current and prevent equipment from running out of phase. The switch has a visible isolation fracture, equipped with a grounding switch and an electric spring mechanism with closing ability, and can be remotely controlled.

Environmental conditions for use

Altitude: 2000m and below;

Environmental temperature: -25 ℃~+40 ℃;

Relative humidity: daily average not exceeding 95%, monthly average not exceeding 90%;

Places without conductive dust, corrosive gases, and water vapor;

Places without fire or explosion hazards;

A place without frequent and intense vibrations.

Model meaning

Main technical parameters

Main technical parameters

Structural characteristics, performance, and external installation dimensions

The FZN21-12 load switch and combination electrical device mainly consist of a framedisconnecting switchIt is composed of (or a fuse acting as an isolation switch), vacuum switch tube, grounding switch, operating mechanism, etc.

This product has a compact structure, small size, long service life, strong closing and breaking ability, and easy operation and maintenance. The vacuum switch is equipped with an electric operating mechanism and an energy storage spring, which can achieve fast opening and closing operations. Isolation switches, vacuum switches, and grounding switches are interlocked with each other to prevent misoperation.

1. Frame 2, isolation knife 3, fuse 4, insulation 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, insulation rod 13, main shaft 14, trip mechanism 15, auxiliary shaft 16, linkage rod 17, operating mechanism load switch without fuse (item 3) and trip mechanism (item 14)