Eberry ZW7 33kv 40.5kv vs1 vcb outdoor high voltage vacuum circuit breaker
Overview:
ZW7-40.5 outdoor high voltage vacuum circuit breaker is used for AC three-phase power system with 50Hz and voltage of 40.5KV, which is used for breaking, closing load current, overload current and short circuit current.
The main function:
1. Vacuum arc extinguishing, strong breaking capacity, long electrical life and 10,000 mechanical life;
2. Simple structure, maintenance-free, long maintenance period;
3. Good insulation performance and strong anti-pollution ability;
4. It can be equipped with spring or electromagnetic operating mechanism, with reliable mechanical performance and frequent operation; no fire and explosion hazard;
5. Built-in current transformer, the lecturer's precision reaches 0.2, which can realize three-phase interactive protection;
6. With condensation controller, it can keep the circuit breaker running reliably under certain temperature and humidity.
Environmental conditions:
1. Ambient air temperature: upper limit +50°C, lower limit -30°C;
2. Altitude: ≤3000m (If the altitude is to be increased, the rated insulation level will increase accordingly);
3. Wind pressure: no more than 700Pa (equivalent to a wind speed of 34m/s);
4. Amplitude: seismic intensity of 8 degrees;
5. Pollution level: Level III;
6. Large daily temperature difference: no more than 35°C.
The main technical parameters:
| NO | Item | Unit | Value |
| 1 | Rated voltage | KV | 40.5 |
| 2 | Rated insulation level | Power frequency withstand voltage | Dry test | 95 |
| Wet test | 80 |
| Lightning impulse 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 | | 0-0.3s-combination-180s-combination |
| 6 | Rated short circuit current breaking times | times | 12 |
| 7 | Rated short circuit closing current (peak) | KA | 50,63,80 |
| 8 | Rated peak withstand current |
| 9 | Rated short-time withstand current | KA | 20,25,31.5 |
| 10 | Rated short circuit continuous current | S | 4 |
| 11 | Average opening speed | m/s | 1.5±0.2 |
| 12 | Average closing speed | 0.7±0.2 |
| 13 | Contact closing bounce time | s | ≤2 |
| 14 | Three-phase combined (minute) gate synchronous time difference | ≤2 |
| 15 | Closing time | ≤150 |
| 16 | Opening time | ≤60 |
| 17 | Mechanical life | times | 10000 |
| 18 | Rated operating voltage and auxiliary circuit rated voltage | V | DC220,110,24 |
| AC220,110,24 |
| 19 | DC resistance per phase circuit (without transformer) | μΩ | ≤100 |
| 20 | Dynamic and static contacts allow wear thickness | mm | 3 |
| 21 | weight | kg | 800 |
