KYNÿ?7.2/31.5-40(F-C) metal armored removable switchgear

Introduction
The F-C circuit of the switchgear is composed of current-limiting circuit breaker with HV high breaking capacity, HV vacuum breaker and protective equipment. It is used as short circuit protection equipment in high short circuit capacity system. And it is especially suitable for controlling HV motor operated frequently and other transformers. Long lifespan of HV vacuum breaker, and short time of HV limited circuit fuse breaking time makes the equipment is of high protection feature.

Service condition
1. Altitude: ÿ?000m
2. Temperature of the environment¡º-10ÿæ~+40ÿæ¡?
3. Relative humidity indoors: daily average value: ÿ?5%; monthly average value: ÿ?0%
4. The switchgear shall be installed where there is no violent shake, no impact, no fire, no explosion and no corrosive danger and not gas that will destroy the insulation to the electric unit.
5. Earthquake intensity: ÿ?.


Main parameters
Main parameters of switchgear

Name unit quantity
Rated insulation level power frequency withstand voltage kV 36
Lighting impulse withstand voltage (peak) kV 70
Rated voltage kV 7.2
Rated current of main bus A 630~3150
Rated short-time withstand current of main bus(4s) kA 40
Rated peak withstand current of main bus(4s) kA 100
Rated current of F-C circuit A 315
Rated short circuit withstand current of F-C circuit(4s) Ka 4
Rated short circuit breaking current kA 40(expected value)
Motor of Max. load capacity of F-C circuit kW 1200
Transformer of Max. load capacity of F-C circuit kVa 1600