Vacuum Circuit Breaker
The AB-3S-40.5 series outdoor pole-mounted permanent magnet vacuum circuit breaker is a new generation of pole-mounted intelligent vacuum circuit breaker developed by our company by integrating advanced technologies from home and abroad, drawing on the strengths of various sources, adopting a brand-new design concept, and utilizing high-tech methods. This product can be used as a switch for the main transformer outgoing line of a 35kV substation, or as a pole-mounted switch for the distribution network. Combined with various control units manufactured by our company, it can easily achieve control, protection, satellite monitoring, and communication, making it the preferred equipment for achieving distribution network automation and miniaturization.
Manufacturer data — model designation, technical parameters, dimensions and installation details.
Operating ambient temperature: not exceeding 40℃; daily average temperature not exceeding 35℃; minimum ambient air temperature -25℃;
Relative humidity: daily average not exceeding 95%, monthly average not exceeding 90%; water vapor pressure: daily average not exceeding 2.2 kPa; monthly average not exceeding 1.8 kPa;
Altitude: Not exceeding 2000m;
The surrounding area was not significantly contaminated by dust, smoke, corrosive and/or flammable gases, vapors, or salt spray.
Vibrations or ground motions from outside the switching and control equipment are negligible;
The amplitude of induced electromagnetic interference in the secondary system does not exceed 1.6kV.
Main technical parameters of circuit breaker
| Project | Unit | Parameter |
|---|---|---|
| Rated voltage | kV | 40.5 |
| Rated current | A | 1250/1600 |
| Rated frequency | HZ | 50 or 60 |
| Power frequency withstand voltage test for 1 minute (wet) (dry) | kV | 80/95 |
| Lightning impulse withstand voltage (peak value) | kV | 185 |
| Rated short-circuit breaking current | kA | 31.5 |
| Rated short-circuit making current (peak value) | kA | 80 |
| Rated peak withstand current | kA | 80 |
| 4S Short-Time Withstand Current | kA | 31.5 |
| Rated operating cycle | Score - 0.1s - Score - 3s - Score - 6s - Score - 60s Recover | |
| Rated short-circuit current breaking times | 次 | 30 |
| Mechanical life | 次 | 20000 |
| Permanent magnet mechanism control voltage | V | DC220 |
| Secondary circuit 1min power frequency withstand voltage | kV | 2 |
