XGN15-12 (F) / T630-25 and XGN15-12 (FR) / T100-31.5 box fixed AC metal closed switch equipment mainly used for three-phase AC 50 Hz, rated at 10 KV power supply system for ring network or two radiation, can also be used at terminal supply as a power control and electrical equipment protection devices.It also applies to load box substation, in particular the compact box substation .