load switches 12kv 24kv 36kv FZN21-12(R)-31.5 indoor load switches

Product Description

   FZN21-12(R)D/T125-31.5 indoor AC high voltage load switches-Fuse combination units   FZN21-12/T630-20 and FZN21-12(R)D/T125-31.5 type Indoor AC high voltage load switch- fuse combination units appliances for three-phase AC 10kV, 50Hz power system, or with the complete power distribution equipment and loop-network switch cabinet , combined substation and other ancillary uses, is widely used in urban network construction and transformation engineering, industrial and mining enterprises, high-rise buildings and public facilities ,can be used as ring power supply unit or terminal equipment, play power distribution, control and protection. Technical performance of the products meet the IEC publication 60265-1/FDIS  < voltage switches, Part 1: Rated voltages below 1kV over 52kV high voltage load switch> IEC60420< Voltage AC load switch – fuse combination units> and CB16926 GB3804<-63kV AC high voltage switches>requirement.    This product has a breaking capacity, safety and reliability, long life, can operate frequent, compact structure, small size, light weight, the basic no need to maintain. Breaking with rated current, overload current (FZRN21-12D/T125-31.5 can short-circuit breaking current) and to prevent equipment missing running ability to switch a visible fracture of isolation, with combined installed capacity of the ground with the relevant switches and electrical spring agencies, to remote control. 

Environment condition

1. The altitude: under 1000M.

2. The ambient temperature: -25℃-+40℃.

3. The relative humidity of air: monthly≤90%, daily≤95%.

4. Amplitude: Earthquake degree 8.

5. Application occasions should free from fire, inflammables, explosives, corrosives and severe vibration.

Structural features

1. load switch, grounding switch, fuse and instructions in a framework that can be flexibly combined, compact, convenient and easy to install a small volume.

2. the fracture is direct acting arrangement. dynamic and thermal stability current parameters is high, time to complete the operation. 

3. with static contact insulation cover, so RMU in the structure to achieve the isolation, eliminating the phase insulating spacer, fracture insulation boards that can prevent internal arc short circuit accident.

4. has a unique valve structure, load switch after opening the shutter automatically fracture isolation, good protective properties. 

5. load switch and grounding switch, a reliable mechanical locking device between the fuse. to meet the "Five Anti requirements.

Two forms of electric operations 6, with manual operation and AC and DC operating power supply, easy to implement power system, "three remote' requirements.

Technical parameter