JXF enclosed control box is suitable for three-phase three-wire system, three-phase four-wire system and three-phase five-wire system with the load current of 50 Hz, 50 OV and below and no more than 630 A. It can control the distribution system, protect the leakage current, and protect the motor from overload, short circuit and lack of phase. the box has reasonable design, small volume and beautiful shape. Safe and reliable use is widely used in metallurgy, petrochemical, medical and health, aviation, residential communities, shopping malls, schools, urban transformation and other industries. The protection level is IP 20, IP 30, IP 43, IP 54, and IP 65, which can meet the needS of different sites.