HXGT8 series RMU are new product in order to upgrade the projects of for the urban and rural power grids by virtue of benefiting from the advantages of other RMU and overcome its disadvantage. The bus room is jointed in FT8-12 vacuum load switch h +fuse composite electric apparatus. The load switch room and bus room is separated by metal boards. This structure has the advantage of being free of insulating plates and the interlock devices over other RMU. The fixed RMU, which is fitted in VT2A type vacuum breaker is used to protect the circuit, it is a supplement of primary wiring scheme of RMU.