1 Overview 1.1 Product use DFW1G-12 cable distribution box for 7.2-12kV three-phase AC 50Hz power distribution system, connecting cables, as the acceptance and distribution of electricity purposes. No conductive parts exposed, all conductive parts are high-strength epoxy resin or silicone rubber insulation for closed, safe and reliable, the appearance can be touched, there is no risk of electric shock. Cable through the elbow plug into the line, through the SF6 switch, insulated bus closed, and then through the load switch, the energy distribution out. Cable distribution box into the line to meet the cross-section of 50 ~ 400mm2 the use of power cables, this product can provide a single cable into the outlet, two-cable access to a variety of installation methods, with more than 100 kinds of wiring options available to users. Busbar side can be installed surge arresters, installation and maintenance is simple, there is no fire hazard, especially for urban residential and high-rise buildings as the distribution of energy use. Is a new type of power distribution equipment suitable for cable power supply. 1.2 Features and use of the product 1.2.1 All energized parts of the incoming and outgoing wires are completely enclosed by high insulation strength gel epoxy or silicon rubber. The insulation layer can withstand all test voltages and can be touched to meet the requirements of long-term operation. 1.2.2 The incoming line can be a solid insulation circuit breaker or a SF6 load switch. When the line for the SF6 switch, SF6 switch spring operating mechanism by the manual operation, outlet solid insulation circuit breaker with a dedicated division of the operating handle. As long as the operating force of the operating handle is greater than 300N (about 30kg), the closing speed of the movable contact is guaranteed to be a certain value, no longer with the operating force, thus ensuring the reliability of closing. 1.2.3 There is a mandatory function to prevent misuse. When the switch is in the closing state, can not be grounded operation, when the switch is grounded, can not be closed operation.