Outdoor high-voltage vacuum circuit breaker are suitable for 35kV three-phase alternating current 50 Hz (60 Hz) power systems, used to switch load current, overload current and short-circuit current.
In vacuum circuit breaker, the vacuum is used as the arc quenching medium. The technology is suitable for mainly medium voltage application, rated operation voltage from 10KV-40.5KV.
- Installation way: foundation installation;
- Operating mechanism: spring operating mechanism and electromagnetic operating mechanism;
- Pole material: rubber silicone, ceramic;
- Application: outdoor 10-40.5kV substation, power plant.
- Current transformer: internal installation/ external installation.
- Ambient temperature: -40℃~+40℃;
- Altitude: ≤1000m;
- Maximum wind speed is 10km/h, minimum wind speed for the rated level (132/230kv) is 3.2km/h;
- Earthquake intensity: ≤8 level;
- Minimum nominal creepage distance: 31mm/kV;
- Air pollution degree: Class IV.
|1min power frequency
|Lightning impulse withstand voltage (peak)||185|
|4||Rated short-circuit breaking current||kA||20、25、31.5|
|5||Rated operating sequence||O－0.3s -CO- 180s-CO|
|6||Rated short-circuit breaking current breaki ng times||Times||12|
|7||Rated short- circu it closed current (peak)||kA||50、63、80|
|8||Rated peak withstand curren t|
|9||Rated short-time withstand current||kA||20、25、31.5|
|10||Rated short-circuit duration||S||4|
|11||Average opening speed||m/s||1.5 ± 0.2|
|12||Average closing speed||0.7 ±0.2|
|13||Contact closing bounce duration||s||≤2|
|14||Three phase closing and opening synchronism||≤2|
|18||Rated operating voltage and aux ilia ry loop rated voltage||V||DC220 、1 10 、24|
|AC220 、110 、24|
|19||Phase loop DC resistance (without current transformer）||uΩ||100|
|20||Permitted accumulate wear－thickness of dynamic and static contact||mm||3|