Portuguese Distribution Box XM Type Configuration

The XM series distribution box is a versatile low-voltage distribution solution suitable for single-phase and three-phase systems, offering modular configurations, overload and short-circuit protection, and flexible installation options.

Overview

The X

M type distribution box is designed for safe and reliable power distribution in residential, commercial, and industrial environments. It supports single-phase two-wire, single-phase three-wire, three-phase four-wire, and three-phase five-wire systems with rated voltages of 230V or 400V and currents up to 400A. The box provides overload protection, short-circuit protection, leakage current protection, and circuit switching functionality, making it suitable for areas accessible to non-professionals.

Construction and Materials

Enclosure: Made of high-quality cold-rolled or electrolytic steel with epoxy resin electrostatic coating for corrosion resistance and durability. Structure: Detachable three-part design consisting of base, mounting bracket, and cover, allowing easy maintenance and installation. Terminals: Equipped with neutral (N) and grounding (PE) terminal blocks.

Knock-out holes on the top and bottom accommodate incoming cables up to 16 mm².

Modular Configuration

Miniature Circuit Breakers (MCBs): XM1~2 series can be fitted with various MCBs and 86-type sockets, each with a modular pitch of 18mm, forming complete distribution units. Transparent Cover Option: XM5 series features a transparent cover with an exposed switch handle for easy monitoring of circuit breaker status. Flexible Design: Can be configured as lighting distribution boxes, power control boxes, metering boxes, air conditioning control boxes, water pump control boxes, or fire control boxes depending on project requirements.

Installation MethodsSurface-mounted or concealed-mounted options are available, allowing adaptation to different building structures. The guide rail and switch can be adjusted horizontally and vertically to accommodate uneven wall surfaces during concealed installation.

Applications

The X

M distribution box is widely used in: Residential buildings, high-grade apartments, and office buildingsHotels, hospitals, warehouses, ports, railway stations, and airportsIndustrial and mining enterprises It is suitable for indoor lighting and small power control circuits, ensuring safe and reliable electricity supply for both professional and non-professional users.

Environmental and Operational Requirements

Ambient temperature: -5°C to +40°CHumidity: Up to 50% at +40°C; higher humidity acceptable at lower temperaturesAltitude: Up to 2000 meters above sea levelPollution grade: Third gradeStandards compliance: IEC60349-1, GB7251. 1-2005, GB7251. 3-2006 This configuration ensures that the XM distribution box is robust, flexible, and suitable for a wide range of low-voltage electrical distribution applications in Portugal or similar environments.