Specifications for Mozambique Class IIB Explosion-Proof Distribution Boxes

Class IIB explosion-proof distribution boxes are designed for hazardous areas, offering Ex d IIB+H2 certification, corrosion-resistant enclosures, modular configurations, and customizable components.

Certification and Safety Standards

These distribution boxes are certified Ex d IIB+H2, suitable for gas group IIB environments with hydrogen presence, and comply with ATEX, IECEx, and UL standards for hazardous areas, including Zone 1, Zone 2, Zone 21, Zone 22, or Class I and Class II, Division 1 applications . They also meet Ex tb standards for dust protection, ensuring safe operation in mixed hazardous atmospheres .

Enclosure Material and Durability

• Materials: Copper-free aluminum or 316 stainless steel, providing high corrosion resistance and long-term durability .
• Surface Finish: Powder-coated for aluminum enclosures to enhance protection against environmental factors .
• Impact Resistance: Designed to withstand mechanical stress and harsh industrial conditions.
• Hinged Structure: Specialized hinges prevent damage to flameproof joints during opening and closing, prolonging service life .

Protection Ratings and Environmental Range

• Ingress Protection: IP66 (IP66/67 with O-ring) and NEMA Types 4, 4X, 7, 9 .
• Operating Temperature: Extended range down to -60 °C, suitable for extreme environments .
• Optional Windows: Heat-resistant tempered glass for monitoring internal components without opening the enclosure .

Electrical and Modular Features

• Rated Voltage: Up to AC 690V 50/60Hz, DC 500V.
• Rated Current: Up to 250A .
• Components: Can integrate MCBs, MCCBs, AC contactors, thermal relays, photo switches, and other electrical devices .
• Modularity: Combination of Ex d (flameproof) and Ex e (increased safety) compartments for flexible configuration .
• Cable Entries: Customizable number, size, and side placement of cable entries; compatible with various cable glands .
• Mounting Options: Wall-mounted, free-standing, or combined installation to save space and meet system requirements .
• Client Customization: Electrical schematics, component selection, and rainproof canopies can be specified upon request .

Applications

These boxes are suitable for offshore, marine, oil and gas, chemical processing, and hygiene-critical environments, providing reliable power and signal distribution in hazardous areas . Their robust construction ensures safe operation under extreme conditions while simplifying installation and maintenance. In summary, Mozambique Class IIB explosion-proof distribution boxes offer highly durable, corrosion-resistant enclosures with flexible modular configurations, certified for IIB+H2 hazardous areas, and customizable to meet specific industrial requirements .