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