FLN36-12D type indoor high-voltage AC load switch is the medium voltage switch equipment consulting international new technologies and in accordance with the relevant standard of the power system. Its performance index completely meets IEC420, 694, 129 and national standard of GB3804-2004 3.6KV-0.5KV High-voltage AC Load Switch, GB1985-2004 High-voltage AC Isolating switch and Grounding Switch, GB/T11022-1999 Common Technological Requirements for High-voltage Switchgear and Control Equipment Standards and it is the main switch component of ring main unit.
This load switch is multi-functional medium voltage switch equipment combining integration brake, breaking brake and the grounding.
Fill 0.05MPa gas of SF6 in a fully-enclosed epoxy shell with strengthening structure. The minimal parts are being used to realized the above three functions to guarantee product quality, improve reliability, avoid maintenance and make sure it operated safely for above 20 years under normal conditions.
Basic function and features of indoor high voltage AC load break switch FLN36-12D
1.The load switch applies double fracture and rotary contact structure. It has three operational statuses: switch on, switch out and ground connection.
2.It applies SF6 gas as the arc extinguishing and insulating media. The main circuit is sealed on the upper and lower shell of the epoxy and its conductivity is not subject to the influence of external environment.
3.Its safety performance is good. If arching occurs in the interior part, the weak spot within the interior part of the shell will burst through. And then the ARC discharging open is burst through and directs the gas out of the cabinet to guarantee the safe check of the safety cabinet.
4.Load switch combines circuit breaker, opening and grounding switch to epoxy shell filled with SF6 gas. The three locations are locked together with compact structure to ensure high security.
Main technical parameters of indoor high voltage AC load break switch FLN36-12D
Rated peak withstand current
4s Rated short-time withstand current
Rated making current
Rated brake current
Active load break current
Closed-loop break current
Cable charging break current
Power frequency withstand voltage 1min phase-to-phase, over the
Lightning impulse withstand voltage phase-to-phase, over the
SF6 gas relative pressure(20℃gage pressure)
Rated operating voltage(power-driven)
Rated voltage of shunt tripper
Average opening speed
Average closing speed
Three-phase closing synchronism
Main circuit resistance
Maximum torque during manual operation
Inter-phase center distance