VB-12 Indoor high voltage vacuum circuit breaker independently developed by our company is the leading domestic level of a new generation of 12kV vacuum circuit breaker.
Its main feature is that the main circuit is installed in the full sealed three-phase insulating cylinder the operation mechanism and the main circuit was of before and after layout.
The operating mechanism is new- type spring one, which is independently researched and developed by my company, has the advantages of simple structure, reliable action, and manufacturing experience for launching tens of thousands of the products, used and referenced by a number of domestic high-end vacuum circuit breaker manufacturers.

Application Environment:
1. Air temperature: Maximum temperature: +40℃; Minimum temperature: -25℃.
2. Humidity: Monthly average humidity 95%; Daily average humidity 90%.
3. Altitude above sea level: ≤2500m
4. Ambient air not apparently polluted by corrosive and flammable gas, vapor etc.
5. No frequent violent shake.