Product Details

ZW8-12 (G)-series outdoor high voltage vacuum circuit breaker

ZW8-12 (G)-series outdoor high voltage vacuum circuit breaker is rated voltage 12KV, three-phase AC 50Hz outdoor high voltage switchgear is mainly used to breaking Closing Rural power network , city network and small power system load current, overload current, short-circuit current . The product of the overall structure is box-type three-phase, three-phase vacuum interrupter placed in metal boxes, using SMC insulation material and inter-phase insulation and ground insulation, reliable performance, high dielectric strength.

ZW8-12G is ZW8-12 a composite by circuit breaker and isolating switch, called the combination of circuit breakers, use for disconnect switches

This series of operating mechanism for the CT23-type spring operating mechanism energy storage can be divided into two kinds of electric and manual.

Mainly Technical parameters

No	Item		Unit	Data
				6.3kA	12.5kA	20kA
1	Rated voltage		kA	6.3	12	20
2	Rated current		A	16	630(1250)	50
3	Rated short-circuit breaking current		kA	16	12.5	50
4	Rated short circuit closed current (peak)		kA	6.3	31.5	20
5	Rated peak withstand current		kA		31.5
6	Rated short-circuit withstand current		kA		12.5
7	Rated insulation level	power frequency withstand voltages (dry)		42
		Lightning impulse withstand voltage (peak)		75
8	Rated operating sequence			O-0.3s-CO-180s-CO
9	Mechanical life		times	1000
10	Rated short-circuit breaking current breaking times		times	20
11	Rated closing voltage of operation mechanism		V	110,220
12	Rated opening voltage of operation mechanism		V	110,220
13	Contact distance		mm	11±1
14	Over stroke (compression length of contact spring)		mm	3 (+1,-0.3)
15	Three phase closing and opening non-synchronism		ms	≤2
16	Contact closing bounce duration		ms	≤2
17	Average opening speed		m/s	1.0±0.2
18	Average closing speed		m/s	0.7±0.15
19	Opening time		m/s	15-50
20	Closing time		m/s	25-50
21	Resistance of main loop for each phase		µΩ	≤0.06
22	Permitted accumulate wear-thickness of dynamic and static contact		mm	≤200