This series of low-voltage withdrawable switchgear is a combination cabinet type assembled by the factory using standard modules (FBA). This series of low-voltage withdrawable switchgear is suitable for power plants, substations, petrochemicals, metallurgical steel rolling, transportation energy, light industry and textile enterprises, residential areas, high-rise buildings and other places. It is used for the conversion, distribution and control of electrical energy in power systems with AC frequency of 50-60Hz and rated working voltage of AC 660V and below. This device complies with the national professional standards GB72511 "Low voltage switchgear" and JB/T9961 "Low voltage withdrawable switchgear", as well as international professional standards such as IEC439-1 and VDE0660 Part 5.