1. An interface insulation structure is adopted to achieve the plug-in of high-voltage components and the expansion of the cabinet.

2. An effective interlock is set between the circuit breaker and the isolating switch to prevent misoperation.

3. High-voltage components are composed of several standard modules, connected in a plug-in manner, which is convenient for application.

4. The cabinets are connected by solid insulation busbars, and there is no gas operation involved during the assembly of the switchgear.

5. Laser welding and helium leak detection technology are adopted, with high reliability.