According to the exterior design, the product is composed of stainless steel shell (SMC) and various functional units. Electrical parts are fully sealed and insulated, and the enclosure is fully enclosed with interlocks. Equipped with unified key, anti - pry and anti - plug hole door lock. Easy and reliable installation, operation, monitoring and maintenance. Reliable performance, no maintenance, stable arc extinguishing performance; The switch itself is equipped with a tricompatibility sensor, which can be directly equipped with an electric display and a short-circuit fault indicator. The operation mechanism is simple and reliable.