HXGT10 (XGN65)-40.5(F)/(F.R) Indoor HV SF6 Ring Main Unit is a 50Hz three-phase AC indoor HV power distribution equipment. It is suitable for ring network power supply and double radiation power supply in 40.5kV power supply circuit. It can change original single radiation type power supply mode. It can recover transformer circuit feeder promptly when the circuit breaks down and increase the reliability and utilization ratio. It especially is suitable for industry and business zone or villages and towns used cable feeder network with large load density of power supply. It has advantages of safety in use, without influencing by weather, easy installation, maintenance-free and small volume. It is suitable for being installed in box type substation very much, load switch or load switch- fuse combination unit can be installed in RMU or made into a separate cabinet to use.