Description

ZW7-40.5 outdoor high-voltage vacuum circuit breaker is used for three-phase power system with ac 50Hz and voltage of 40.5kv, for breaking and closing load current, overload current and short circuit current.

Working conditions

1.the ambient air temperature: cap+ 40℃, the minimum - 30℃;

2.Altitude: 2000m(if elevation is needed, the rated insulation level shall be increased accordingly);

3.Wind pressure: not exceeding 700Pa(equivalent to 34m/s wind speed);

4.amplitude: seismic intensity 8 degrees;

5.Pollution level: level III;

6.the maximum daily temperature difference: no more than 25℃.

Model and meanings

Features and advantages

1.Vacuum arc extinguishing, strong breaking ability, long electrical life and 10,000 mechanical life;

2.simple structure, no maintenance, no long maintenance cycle; 3, good insulation performance, anti-pollution ability;

4.can be equipped with spring or electromagnetic operating mechanism, mechanical performance is reliable, frequent operation; No fire and explosion hazard;

5.Built-in current transformer with accuracy up to 0.2 level can realize three-phase interactive protection;

6.The built-in condensation controller can keep the circuit breaker running reliably under certain temperature and humidity .

Main technical parameters

No	Item			Unit	Data
1	Rated voltage			KV	40.5
2	Rated insulation level	Power frequency withstand voltage	dry		95
			wet		80
		Lightning withstand voltage (peak)			185
3	Rated current			A	125016002000
4	Rated short circuit breaking current			KA	202531.5
5	Ra1ed operating sequence				0-0.3s-CO- l 80s-CO
6	Operations of breaking rated short circuit breaking current			Times	12
7	Rated short circuit making current (peak)			KA	506380
8	Rated peak withstand current
9	Rated short time withstand current			KA	202531.5
10	Rated breaking continuous current			S	4
11	Average opening speed			MS	1.5±0.2
12	Average closing speed				0.7±0.2
13	Asynchrony of three-phase closing, opening			S	≤2
14	Jumping time during contact closed				≤2
15	Closing time				≤150
16	Divide production and time				≤60
17	Mechanical life			Times	10000
18	Rated operating voltage and auxiliary circuit voltage			V	DC22011024
					AC22011024
19	DC rt1is1anceof eacbphaserircui1doesn01indudemurnal inductor			UΩ	≤100
20	total permissible abrasion 1hickness of moving and s1a1ic con1ac1s			mm	3
21	Weight			kg	800