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XL-21系列動力配電箱適用于發電廠、變電站、石油、化工、冶金、機械等廠礦企業和高層建筑的低壓配電系統，作為動力、配電、電動機、控制中心等電能轉換 、分配與控制。XL-21動力配電箱分為兩種型式，箱體高度1700mm和1800mm的為普通型( P型 )，箱體獨立安裝，根據要求頂部可開進出線孔；箱體高度1900mm的為帶頂母線型(M型)，箱頂裝有可拆卸的蓋板， 方便母線安裝和拆卸。
The XL-21 Series Power Distribution Cabinet is suitable for the low-votage power distribution system of power plants, substations, petrochemical, metallurgical and mechanical factories and mines and high-rise buildings for power conversion of the power, power distribution, motors and the contol centers. There are two types of power distribution cabinets with heights of 1700mm and 1800mm (P type). The cabinets are installed independently. According to the requirements, at the top of the cabinets, the holes for incoming and outcoming cables can be opened. The cabinet with the height of 1900mm is of buses type (M Type). There is removable cap on top of the cabinet for the convenience of buses assembling and disassembling.
Structural Characteristics and Functions
The cabinet is composed of disassembling frameworks, door panels, side and rear panels. The panels and side beams can be adjusted. The installation and maintenance are flexible and convenient. The fine casting door hinges are used. The door can be opened more than an angle of 1350. The mounting brackets can be adjusted after the electrical components are installed. The cabinet can be installed with incoming and outcoming cables according to different working environments with strong popularity. The cabinets could be combined for operation.
Standards: IEC439, GB7251.1, JB/T9661
Rated Voltage: AC400V
Rated Insulation Voltage: 660V
Rated Current: 630A
Rated Short-Term Withstand Current: 30kA
Protection Level of Shell: IP30