Specifications of Explosion-proof Distribution Boxes for Smart Buildings

Explosion-proof distribution boxes are specialized enclosures designed for safe electrical distribution in hazardous areas, available in multiple models, materials, and configurations to meet IECEx, ATEX, and UL standards.

Key Models and Types

• CEAG GHG60 Series: Offers IEC Ex e protection, available in fiberglass-reinforced polyester and electropolished stainless steel, with multiple enclosure sizes and optional cable entries, bus bars, or extensions for flexible installation .
• HRMD91 Series: Flameproof (Ex d IIB+H2) enclosures made from copper-free aluminum alloy, powder-coated, suitable for distribution boxes, switch boxes, control boxes, and motor starting boxes. Features specialized hinges to protect flameproof joints and supports modular installation .
• Pepperl+Fuchs EJB/EJBX Series: Terminal and junction boxes in aluminum (EJB) or stainless steel (EJBX), certified for Zones 1, 2, 21, 22, and Class I/II Division 1. Offers IP66/IP67 protection, wide operating temperature ranges (-60°C to high ambient), and customizable terminals, cable entries, and viewing windows .
• Shenhai Series: Includes GCK, GCS, MNS (low-voltage withdrawable switchgear), GGD, GDH, PGL (fixed switchgear), XZW (comprehensive distribution), ZBW (box-type substation), XL/GXL (low-voltage distribution), XF (electrical control), and PZ/PXT series for terminal lighting and metering boxes. Supports 220V/380V, single-phase or three-phase input, and configurable main switch types and protection levels .
• Atex Delvalle Series: Custom stainless steel (AISI 304L/316L), aluminum, and GRP enclosures, ATEX and IECEx certified, suitable for Zones 1, 2, 21, 22. Includes wall-mounted, desk, and large XXL enclosures with IP66/NEMA 4X protection, pressurization options, and rapid delivery for industrial applications .

Materials and Construction

• Stainless Steel (304L/316L): High corrosion resistance, suitable for offshore, marine, and chemical environments .
• Aluminum Alloy: Lightweight, corrosion-resistant, often powder-coated for durability .
• Fiberglass-Reinforced Polyester (GRP): Non-conductive, flame-retardant, suitable for harsh environments .

Installation and Configuration

• Mounting Options: Wall-mounted, floor-standing, hanging, concealed, or exposed installations .
• Modularity: Many series allow combination of boxes, flexible cable entry directions, and modular internal components like PLCs, fuses, soft starters, frequency converters, and bus bars .
• Cable Entries: Standard M ☐ x 1.5 plugs, NPT plugs on request, with optional cable glands (DQM-II or DQM-III recommended), .

Electrical and Protection Specifications

• Voltage Levels: Typically 220V or 380V, single-phase or three-phase .
• Protection Types: Ex d (flameproof), Ex e (increased safety), Ex tb (dust protection), suitable for gas groups IIB+H2 .
• IP/NEMA Ratings: IP66/IP67, NEMA 4, 4X, 7, 9 for water, dust, and impact resistance .
• Temperature Range: Wide operating ranges, often down to -60°C, with consideration for component temperature rise .

Applications in Smart Buildings

Explosion-proof distribution boxes are used for safe power and signal distribution in smart buildings, integrating with lighting controllers, fire monitoring systems, motor protection switches, UPS, and industrial PCs. Their modularity and certification ensure compliance with safety standards while supporting automation and energy management systems . These enclosures provide reliable, long-term performance in hazardous or harsh environments, ensuring both employee safety and equipment protection in smart building electrical networks.