Product Desciption Main Distribution Frame consists of frame, protection blocks, test blocks, protector modules, alarm system and other accessories. The double side Main Distribution Frame made by advance aluminum-alloy with safety grounding system Facilitate installation and enlarge capacity. The single side Main Distribution Frame improve the advantage of double side Main Distribution Frame, The termination of both external side and exchange side are on the front; The operation of jump wire, alarm system, protectors are also on the front. It completely realizes the front-operation which reduce the space requirement and laying wires regulary it is facilitate operation and maintenance. Main Distribution Frame is wholly module structure which make it ease of access for installers Effectively isolate equipment and maintenance personnel prevent from damage which cause by lighting or other matter.