Rockwill SF6‑free ring main unit adopts advanced solid epoxy insulation technology without sulfur hexafluoride gas. It features environmental‑friendly design, high safety, IP67 protection grade and 30‑year service life. Compact and modular‑structured, it adapts to various harsh environments, widely used in urban power grids, new energy power stations, industrial parks and municipal infrastructure, complying with international IEC standards.