XL-21 Power Distribution Cabinet-Jiangsu Laibao Electric Power Co., Ltd.

XL-21 Power Distribution Cabinet

Product Overview:

The XL-21 power distribution cabinet is designed for use in power plants, substations, civil buildings, and industrial or mining enterprises. It is suitable for three-phase AC systems with a rated frequency of 50Hz, a rated voltage of 380V, and a rated current of up to 600A. The unit facilitates power conversion and distribution, as well as local operational control of on-site loads. Compliant with the GB/T7251.12-2013 national standard, it features an enclosed sheet-steel cabinet structure that supports standalone or combined installation, meeting requirements for incoming lines, outgoing feeders, and motor control.

Performance Features

①　Simple and Practical Structure: The cabinet is constructed from formed and welded sheet steel and features a single-leaf door on the front that opens to the left; instruments and control components can be mounted on the door. Designed for wall-mounted installation with top or bottom cable entry/exit, it suits standard power distribution applications.

②　Flexible Functional Adaptability: Supports various functions such as incoming lines, outgoing feeders, and motor control. Electrical components (circuit breakers, fuse-switch disconnectors, contactors) are available in various current ratings to meet diverse load requirements.

③　Safe and Convenient Operation: Designed for front-side operation; maintenance requires qualified personnel. An interlocking mechanism between the disconnector and the air circuit breaker prevents operational errors.

Technical Parameters

Serial number	Project		Unit	Parameters
1	Rated operational voltage	Main circuit	V	220、380
1	Rated operational voltage	Auxiliary circuit	V	AC：220、380；DC：110、220
2	Rated insulation voltage of the main circuit		V	690
3	Rated current of the main circuit		A	10~400、630
4	Current ratings of major electrical equipment	Circuit breakers	A	63、100、200、400、630
		Fuse‑switch disconnectors		200、400、600
		Contactors		10、16、25、63、100、150、250
5	Enclosure protection rating		-	IP3X
6	Overall dimensions	Width	mm	600
		Depth		370、470
		Height		1600、1700
Note: The current ratings mentioned above refer to the rated current of the electrical equipment. As this distribution box features an enclosed design, appropriate consideration should be given to factors such as the capacity, quantity, and duty cycle of the circuits when selecting the equipment.

Environmental Conditions

①　Ø Indoor use; altitude not exceeding 1,000 meters;

②　Ambient air temperature range: -5°C to +40°C; the 24-hour average temperature must not exceed +35°C; if this limit is exceeded, derated operation is required based on actual conditions;