Sri Lanka Explosion-proof Distribution Box Standards

Explosion-proof distribution boxes in Sri Lanka are available in multiple models, materials, and installation types, suitable for industrial and hazardous environments, with voltage ratings typically at 220V or 380V. Common Models and TypesExplosion-proof distribution boxes are categorized based on function, installation, and voltage: Low-voltage withdrawable switchgear cabinets: GCK, GCS, MNSLow-voltage fixed switchgear cabinets: GGD, GDH, PGLComprehensive distribution boxes: XZWBox-type substations: ZBWLow-voltage distribution cabinets and construction site boxes: XL, GXLElectrical control boxes: XFTerminal lighting distribution boxes: PZ20, PZ30 seriesElectric metering boxes: PZ40, XDD (R)Surface-mounted and concealed distribution boxes: PXT (R)K-X/X-X/X-X/X-IPX series, with specifications for rated current, short-time withstand current, inlet style, outlet circuits, and main switch type/protection level.

Materials and Construction

Metal and flame-retardant plastic are commonly used for durability and fire resistance.

AB

S resin or PC materials provide impact resistance, heat resistance, UV protection, and corrosion resistance. Silicon rubber seals ensure waterproofing, non-toxicity, and high-temperature stability.

Installation Methods

Vertical, hanging, concealed, or exposed installations are available depending on site requirements. Surface-mounted boxes are marked with PXT, while concealed installations are indicated with (R) in the model code.

Electrical Specifications

Voltage levels: 220V or 380V, suitable for low-voltage industrial applications. Rated current and short-time withstand current: e.g., 250A/10kA, adjustable per customer requirements. Inlet and outlet configurations: single-phase, three-phase, or mixed input; multiple circuit options for outlets.

Protection levels: IP30 or higher, depending on model and application.

Certifications and Compliance

Many models are IECEx and ATEX certified, suitable for Zone 1 and Zone 2 hazardous areas. Offshore and industrial-grade boxes may comply with DNV 2. 7-1, BS EN 12079: 2006, and ISO 10855: 2018 standards.

Applications

Industrial plants, oil and gas facilities, chemical processing units, and construction sites where explosive atmospheres may occur. Suitable for lighting, power distribution, metering, and control systems in hazardous environments. For sourcing in Sri Lanka, suppliers like General Power Electric and Hexlonex provide a range of explosion-proof distribution boxes with customizable specifications, including IP ratings, material types, and installation options.