MLS can be applied in power plants, substations, transportation industries and other industries in power system, as controlling and protection equipment for distribution, motor, energy transfer, power factor compensator, etc. The key features of MLS switchgear are compact structure, economic circuit arrangement scheme, convenient for maintenance, safety service. The cabinets need no maintenance after assembled with the flexible structure frame, could install different standard elements to satisfy customers different requirements. Thanks for the system design and reliable materials, this switchgear can prevent the internal arc fault occur maximum.