MGA series environmental protection gas-insulated ac metal-enclosed switchgear and control equipment (hereinafter referred to as MGA series switchgear) is environmental protection gas-insulated medium-voltage switchgear independently developed by Mohor company. It has the characteristics of green environmental protection, reliable operation, safety guarantee, compact structure design, small space occupation, maintenance-free, long life, and strong environmental adaptability. MGA series switchgear is a completely sealed system, all of its primary components live parts and switches are enclosed in a stainless steel shell, not affected by the environment; The product adopts modular design, it can be arranged arbitrarily according to different design schemes to realize the combination of common box and extended units to meet the needs of compact switchgear for various secondary transmission and distribution substations. MGA series switchgear has passed the type test of the national high-voltage electrical apparatus test center, and can be widely used in small secondary power distribution stations, box-type switching stations, industrial and mining enterprises, airports, railways, commercial districts, high-rise buildings, highways, subways, tunnels and places with harsh natural conditions.