ZW7-40.5 (ZW□-12/3150)OUTDOOR HIGH VOLTAGE VACUUM CIRCUIT BREAKER

Short Description:

ZW7-40.5 outdoor high-voltage AC vacuum circuit breaker is a three-phase AC current transformer with a rated voltage of 40.5kV, 50Hz, and an external outdoor power distribution device. It is mainly used to open and close the load current, overload current and short circuit current in the power system of the distribution network. It is suitable for protectionand control in substations and power distribution systems of industrial and mining enterprises, suitable for rural power grids and frequently operated places, and especially suitable for the needs of urban and rural power grid transformation

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Product Overview

Working Environment

1.Ambient air temperature: upper limit +40℃ , lower limit -30℃ (general）、-40℃（area), -40℃ (alpine area);
2. Altitude: ≤ 1000m (if the altitude increases, the rated insulation level will increase accordingly);
3. Wind pressure: no more than 700Pa (equivalent to wind speed 34m/s);
4. Earthquake intensity: no more than 8 degrees;
5. Pollution level: Grade IV;
6. Maximum daily temperature difference: no more than 25℃

Main Technical Parameters

No.	Item			Unit	Data
1	Rated voltage			kV	40.5
2	Rated insulation level	1 min Power frequency withstand voltage	Dry		95
		1 min Power frequency withstand voltage	Wet		80
		Lightning shock withstand voltage (peak)			185
3	Rated current			A	1250、1600、2000
4	Rated short-circuit breaking current			KA	20、25、31.5
5	Rated operation sequence				open-0.3s-close open-180s-close open
6	Rated short-circuit current breaking time			Times	12
7	Rated short-circuit closing current (peak)			KA	50、63、80
8	Rated peak withstand current			KA
9	Rated short-time withstand current			KA	20、25、31.5
10	Rated short circuit duration			s	4
11	Contact opening distance			mm	22±2
12	Contact overstroke			mm	4±1
13	Average opening speed			m/s	1.5±0.2
14	Average closing speed			m/s	0.7±0.2
15	ontact closing bounce time			ms	≤2
16	Three-phase closing（opening） synchronous time difference			ms	≤2
17	losing time			ms	≤ 150
18	Opening time			ms	≤ 60
19	Mechanical life			Times	10000
20	Auxiliary circuit rated voltage under rated operating voltage			V	DC110/220、AC110/220
21	DC resistance per phase circuit (excluding transformers)			μΩ	≤ 100
22	Weight			kg	800