Single Phase Outdoor Vacuum Circuit Breaker
The HZW20-12 outdoor vacuum circuit breaker is ideal equipment to avoid widespread power cuts when a single user failure happens. The outlet side of this device is equipped with a current transformer which works together with the controller. Installed on the T point of 10kV overhead distribution lines or user terminals, this vacuum circuit breaker can realize the automatic switching off of single-phase grounding line faults and automatically isolate short-circuit faults, ensuring the electrical safety of non-faulty users. For this reason, it is designed for use in areas such as substations, industrial and mining enterprises, rural power grids and distribution systems.
The outdoor vacuum circuit breaker is suitable in areas such as substations, industrial and mining enterprises, rural power grids and distribution systems which play roles in protection and control during operation.
The overall structure of the outdoor vacuum circuit breaker is a superior box-type seal structure with full enclosure, and the material of shell is made of stainless steel so that the device is maintenance-free.
| Commodity | Unit | Parameters |
| Rated Voltage | kV | 12 |
| Rated Current | A | 630/1250 |
| Rated Frequency | Hz | 50 |
| Rated short-circuit breaking current | kA | 25 |
| Breaking times of Rated short-circuit breaking current | Times | 30 |
| Rated peak with stand current | kA | 63 |
| Rated short-time withstand current(4S) | kA | 25 |
| Rated short-circuit current | kA | 63 |
| 1 min power-frequency withstand voltage & 1min | kV | 42/48 |
| lightning impulse withstand voltage | kV | 75/85 |
| Mechanical service life | Times | 10000(Spring) 30000(Permanent Magnetic) |
| Rated operation order opening-0.3s-closing and opening -180s- closing and opening | ||
| Switch weight | Kg | 150 |
- Altitude: Within 2000 meters;
- Gradation for Surface Pollution: IV
- Temperature: -40 ℃- 40 ℃
- Wind Speed: Within 35m/s
- Earthquake Intensity: Within 8 magnitudes
- Using condition requests no flammable, explosive danger, chemical corrosion
