12KV Indoor Vacuum Circuit Breaker

Type: ZW8
Vacuum circuit breaker(VCB) is high voltage outdoor switch gear with rated voltage 12kV, three-phase AC 50Hz, which is mainly used for making and breaking load current, over-current, short-current rural network, city network and miniature power system. The overall structure of this product is three-phase co-box type, three-phase vacuum explosion chamber in the metal box, the performance is reliable and insulation strength is higher by making use of SMC insulation material phase to phase insulation and to earthing.

Number	Item		Unit	Data
				6.3kA	12.5kA	20kA
1	Rated voltage		kV	12
2	Rated current		A	630
3	Rated short circuit breaking current		kA	6.3	12.5	20
5	Rated short circuit breaking current (peak value)		kA	16	31.5	50
6	Rated peak value withstand current		kA	16	31.5	50
7	Rated short time withstand current		kA	6.3	12.5	20
8	Rated insulation level	1min power frequency withstand voltage(dry type)	kV	42
		Lighting Impulse withstand voltage		75
9	Rated sequence of operations			O-0.3s-CO-180s-CO
10	Mechanical life		Time	10000
11	Breaking times for rated short circuit current		Time	30
12	Operating voltage		V	110,220(DC or AC)
13	Clearance between open contacts		mm	11±1