XL-21系列动力配电箱适用于发电厂、变电站、石油、化工、冶金、机械等厂矿企业和高层建筑的低压 配电系统，作为动力、配电、电动机、控制中心等电能转换、分配与控制。XL-21动力配电箱分为两种型式， 箱体高度1700mm和1800mm的为普通型(P型)，箱体独立安装，根据要求顶部可开进出线孔；箱体高度 1900mm的为带顶母线型(M型)，箱顶装有可拆卸的盖板,方便母线安装和拆卸。

XL-21 series power distribution box is suitable for low-voltage power distribution systems in power plants, substations, petroleum, chemical, metallurgy, machinery and other factories and high-rise buildings, as power, power distribution, electric motors, control centers and other power conversion, distribution and control. XL-21 power distribution box is divided into two types, the box height of 1700mm and 1800mm are ordinary type (P type), the box body is installed independently, and the top of the box can be opened according to requirements. Busbar type (M type), the top of the box is equipped with a removable cover plate, which is convenient for busbar installation and removal.