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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


Product Detail

Product Tags

Product Overview

   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

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
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

 

Appearance And Installation Dimensions


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