The XL-21 type power cabinet is suitable for power distribution in power plants and industrial and mining enterprises, in three-phase four-wire or three-phase five-wire systems with an AC voltage of 500 volts or below. The XL-21 type power cabinet is an indoor device mounted against the wall, with maintenance performed from the front of the panel. The enclosure is made of bent steel plates, and the operating handle for the knife switch is located on the upper part of the right front pillar of the cabinet, which can be used for switching power sources. Different models and circuit breakers of various current ratings can be selected according to user requirements to meet the needs of different users.

The XL-21 low-voltage power distribution cabinet is of a closed type, with the enclosure made of bent steel plates. The knife switch operating handle is mounted on the upper part of the right front column of the cabinet and can be used to switch power sources. A voltmeter is installed on the front of the distribution cabinet to indicate the voltage of the bus. The front of the distribution cabinet has a door, and when the door is opened, all equipment inside the cabinet is exposed, making it convenient for inspection and maintenance. This distribution cabinet uses domestically designed components, featuring a compact structure, ease of maintenance, and flexible circuit layout combinations. In addition to being equipped with air circuit breakers and fuses for short-circuit protection, the distribution cabinet also includes contactors and thermal relays. The front door of the cabinet can be fitted with operation buttons and indicator lights.