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Cuban Industrial Distribution Box Specifications

Fiber and communications infrastructure knowledge brief Published 01 Aug 2023

Prepared for preliminary research by the ROGER FIBRE knowledge desk. Confirm optical interfaces, port or core capacity, electrical input and output, enclosure protection, thermal design and installation limits against current standards and product documentation.

Cuban industrial distribution boxes, such as the XL-21 low-voltage cabinet, are designed for indoor industrial and commercial use, supporting voltages up to 500V, currents below 630A, and compliant with IEC 60439-1 and GB7251. 1 standards.

General Description

Cuban industrial distribution boxes, including the XL-21 type, are low-voltage power distribution cabinets made from bent steel plates and welded angle steel, offering a compact, durable, and maintainable structure. They are suitable for single-phase and three-phase systems with frequencies of 50Hz to 60Hz, and can operate in IT, TN-C, and TT systems for power and lighting distribution. These boxes are widely used in industrial plants, mining enterprises, schools, government institutions, and civil buildings.

Technical Parameters

Voltage Rating: Up to 500VLoad Current: Below 630AFrequency: 50Hz–60HzProtection Level: Compliant with IEC 60439-1 and GB7251. 1 standardsAmbient Temperature: -5°C to +40°C, with a 24-hour average not exceeding +36°CAltitude: Maximum 2000 metersRelative Humidity: Up to 50% at +40°C; higher humidity allowed at lower temperatures (e.g., 90% at +20°C)Installation Tilt: Should not exceed 5° from verticalEnvironmental Requirements: Free from severe vibration, impact, and corrosive conditions Structural FeaturesEnclosure: Bent steel plates with welded angle steelFront Door: Single-sided, front-opening, can be fitted with operation buttons, indicator lights, and display instrumentsInternal Components: Air circuit breakers, fuses, contactors, thermal relays, and optional knife switches for power disconnectionGrounding: Both door and enclosure equipped with grounding screws for reliable connectionMaintenance: Front door allows full exposure of internal equipment for easy maintenance Components and Safety FeaturesCircuit Protection: Air circuit breakers and fuses protect against short circuits and overloadsContactor and Thermal Relays: Control and protect motors and other equipmentIndicator Lights and Buttons: Provide operational status and controlOptional Modules: Some distribution boxes may include energy monitoring units or communication modules for smart monitoring and remote control Installation and UsageMounting: Indoor wall-mounted installationSystem Compatibility: Single-phase or three-phase systems, suitable for power and lighting distributionMaintenance Access: Front-opening design ensures easy access to all internal componentsOperational Safety: Knife switch handles and isolators allow safe disconnection during maintenance Cuban industrial distribution boxes are engineered to provide safe, reliable, and flexible power distribution in industrial and commercial environments, with compliance to international and domestic standards, robust construction, and optional smart features for monitoring and control.

Cuban Industrial Distribution Box Specifications - ROGER FIBRE ATELIER [PDF]

Cuban Industrial Distribution Box Specifications

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Technical note

This reference is intended for preliminary fiber and communications infrastructure research. Optical interface, fiber type, port or core capacity, electrical input and output, enclosure protection, cooling, installation limits and applicable standards must be verified for the specific project.

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