The ZW20-12 type outdoor high-voltage vacuum circuit breaker is an outdoor distribution equipment with a rated voltage of 12kV and a three-phase alternating current of 50Hz. It employs vacuum arc extinguishing and SF6 gas as the insulating medium. Primarily used for switching and closing load currents, overload currents, and short-circuit currents in rural, urban networks, and small power systems. The product features a three-phase common tank design, with the three-phase vacuum arc-extinguishing chambers housed within a metal tank, ensuring reliable transformation performance and high insulation strength. This product can store energy electrically and operate the opening and closing electrically, as well as store energy manually and operate the opening and closing manually, and it can be remotely controlled either locally or from a distance. Additionally, the product boasts superior breaking performance, low operating power, high reliability, flexible installation options, and maintenance-free characteristics. It is suitable for protection and control in substations and industrial power distribution systems, and is particularly well-suited for rural power grids and locations requiring frequent operation, especially for urban and rural grid renovation needs.