The main switch of HXGN15-12 new switch cabinet uses the current advanced permanent magnet mechanism vacuum circuit breaker produced in Ukraine. This product meets the requirements of today's environmental protection and meets the development direction of the world's medium voltage switch. The switch cabinet retains the original advantages of the fixed box cabinet, due to the use of high performance maintenance-free permanent magnet vacuum circuit breaker, so that the structure is very compact, small size, flexible expansion, coupled with the sensor technology and the adoption of new protective relay, the product performance has reached a very high level. Therefore, the product is especially suitable for urban residential areas, small secondary substation, open and close substation, box substation, in residential areas, industrial and mining enterprises, airports, subway, railway and other occasions widely used.