概述    Outline

XL-21 型低压动力配电柜适用于发电厂及工矿企业中，在交流电压 500 伏及以下的三相四线或三相五线系统作动力配电之用。XL-21 型低压动力配电柜系户内装置靠墙安装，屏前检修。外壳用钢板弯制而成，刀开关操作手柄于箱前右柱上部，可以作为切换电源之用。可根据用户需要，选用不同型号，不同电流等级的断路器，满足不同用户的需求。

XL-21 Type low voltage power distribution cabinet is applicable to power station and industrial and mining enterprise, used for power distribution in three-phase four-wire or three-phase five-wire system with AC 500V and below. It is installed indoors and near the wall. Repair before shield. Shell is bent with steel plate. Knife switch operation handle is installed to the upside of right column of cabinet front, can be used for switching power. Choose different types and circuit breakers with different current grades to user's specific requirements.

型号及含义   Model and meaning

主要技术参数   The main technical parameters