RDG-12 solid-state fully insulated closed ring network switchgear is a new generation of environmentally friendly composite insulated ring network cabinet developed by our company. It is mainly composed of three components, namely V unit (circuit breaker unit), C unit (load switch unit), F unit (combined electrical unit), each unit can be used alone or can be freely expanded. Its structure is divided into intelligent control instrument room, operation mechanism and primary part. The instrument room can be equipped with microcomputer protection (controller). The mechanism is a special elastic operation mechanism. The primary part adopts APG automatic gel process. The isolation switch and the arc interrupter are completely sealed in epoxy resin, and there are special connectors and busbars connected. The arc interrupter designed for the switch uses special copper-chromium contact materials, R-type longitudinal magnetic field contacts, and a complete…