40.5KV Indoor Vacuum Circuit Breaker

Type: ZN23
Vacuum circuit breaker(VCB) is rated voltage 40.5KV, three-phase AC 50HZ indoor high voltage electric appliance equipment. It is suitable for using industry and mining enterprise, transformer substation and so on for controlling and protecting switch gear ,especially for the metallurgy, the electric arc steel-making and so on where needs the frequently operation for control and protection device.

Number	Item	Unit	Data
1	Rated voltage	kV	40.5/35
2	1min power frequency withstand voltage	kV	95
3	Lighting impulse withstand voltage	kV	185
4	Rated frequency	Hz	50
5	Rated current	A	1250,1600,2000
6	Rated short-time withstand current	kA	25,31.5
	Rated short-circuit withstand current	kA	25,31.5
7	Rated peak value withstand current	kA	63,80
8	Rated short-circuit duration	s	4
9	Rated short-circuit time	ms	≤90
10	Rated short-circuit making current	kA	63,80
11	Rated operation sequence		O-0.3s-CO-180s-CO