Product Overview

The new XL-21 power boxes are widely used in power plants and industrial and mining enterprises in the following three-phase AC 500V three-phase three-wire, three-phase four-wire, three-phase five-wire distribution systems, such as for power or lighting distribution purposes, the Department of indoor wall installation, front panel operation, maintenance front panel; cabinet is fully enclosed structure, assembled by C profile or profiles from 8MF. Box using the new rotary load isolation switch, with a load operation, equipped with a voltage, current, indicating instruments and lights, buttons, switches, etc. on the front of the main door to make components. The distribution box using the new self-designed components, compact, elegant design, easy maintenance, a variety of wiring schemes to choose from, is an alternative to the old-type XL-21 power box ideal product.

Model Description

Use of the environment

◆ Ambient temperature: -5 ℃ ~ + 40 ℃, and the average temperature within 24h not exceed + 35 ℃.

◆ Altitude: not exceed 2000m.

◆ Relative humidity: in the ambient air temperature is + 40 ℃ does not exceed 50%; at lower temperatures can have a high relative humidity (eg: + 20 ℃ at 90%), taking into account the temperature

◆ change allows the generation of moderate condensation.

◆ equipment installation and the vertical gradient should not exceed 5 °.

◆ equipment should be installed in the absence of severe vibration, shock-free and corrosion-free place.

Note: More than the above conditions can be negotiated with the company.

Technical parameters

Product Features

◆ GB7251.1 and electrical performance in full compliance with the relevant provisions of IEC 60439-1.

◆ feeding the switch using small, high breaking arcing short (or no flying fox) and duplex MCCB new release, with overload, short circuit protection and user requirements to install leakage protection.

◆ motor circuit with overload, short circuit, undervoltage, phase protection.

◆ auxiliary circuit has a place, remote control functions and local, remote automatic switching function.

Installation, inspection and precautions before operation

After the arrival of the product, first check the packaging is intact, identify problems and shall promptly notify the authorities find out the reasons for the product should not be installed immediately under the normal conditions of use, as the place to adapt.

◆ product installed base and bolt channel owned by the user, with the cabinet base channel connecting hole (see Figure 1)

Conduct such inspection and test the product before ◆ After installation, put into operation

◆ Check the cladding layer paint cabinet without loss, cabinet meat is dry and clean;

◆ off major appliances and auxiliary contacts are reliable, accurate;

◆ Selection of the main components, wiring principle is consistent with the principle of pattern;

◆ with 500V megger insulation value of not less than 1MΩ. Note that not withstand voltage disconnect wiring and electronic components measured.

◆ Use Caution

Low-voltage air circuit breakers, etc. After several minutes after the close, will make the main contact local burns and carbon-based material to produce the contact resistance increases, should be regularly universal low-voltage air circuit breaker according to their requirements for manual maintenance and repair.

Box shape and installation dimensions

Ordering Information

◆ All types of products (including the main circuit and auxiliary circuit scheme number sign).

◆ main circuit system diagram, Pareto Cabinet plane.

◆ auxiliary circuit electrical schematics.

◆ cabinet components list (main bus specification).

◆ cabinet colors (such as No, press the gray light camel supplier) box size.

◆ other special requirements and the product under normal conditions of use does not match.