Detailed Product Description

vacuum circuit breaker(VCB) is high voltage outdoor switch gear with rated voltage 12kV, three-phase AC50Hz, 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.

ZW8-12G is formed with ZW8-12 circuit breaker and isolation knife, called combined circuit breaker, may use for breaking switch.

The operating device of this series product is CT23 spring loaded operation mechanism, divides into two kinds of motor operation and manual operation.

 

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	50
12	Operating voltage		V	110,220(DC or AC)
13	Clearance between open contacts		mm	11±1