Portuguese Explosion-proof Distribution Box Specifications and Dimensions

Explosion-proof distribution boxes in Portugal typically feature aluminum or stainless steel enclosures, IP54–IP66 protection, multiple circuit options, and compliance with GB3836 or IECEx/ATEX standards.

Key Specifications

Enclosure Material and Protection:

• BR-3 Series: Aluminum alloy with electrostatic powder coating, IP54, wall-mounted or floor-standing, suitable for Class I, Zone 1 and 2 hazardous areas, compliant with GB3836.2-2000 .
• HRMD92 Series: 316 stainless steel, flameproof (Ex d IIB+H2), IP66, with specialized hinge structure to protect flameproof joints .
• SBOX Series: Aluminum alloy with stainless steel fasteners, IP66, suitable for IIB+H2 and IIC gas groups, compliant with GB3836 and IECEx standards .

Dimensions and Installation:

• Dimensions vary by model and number of circuits. For example, SBOX series boxes have appearance dimensions ranging from 218×310×390 mm to 672×720 mm, with inner space dimensions adjusted for cable entry and component installation .
• Bottom power inlet is common for BR-3 and SBOX series, facilitating cable entry. Wall-mounted, floor-standing, or bracket-mounted options are available .
• HRMD92 boxes can be combined modularly to save space and meet system requirements .

Electrical Features:

• Input: Single-phase or three-phase, depending on site power conditions .
• Output Circuits: Options from 1 to 12 circuits, supporting both single-phase and three-phase loads .
• Protection Devices: Built-in multi-pole circuit breakers, ground leakage protection, overload and short-circuit protection, optional sound-light alarm devices .
• Control Integration: Can integrate digital temperature controllers or BJW-type thermostats for automatic start/stop and temperature management in heat tracing systems .

Standards and Compliance:

• Compliant with GB3836.1-2010, GB3836.2-2010, GB12476.1-2013, GB12476.5-2013, and IEC 60079 series for explosion-proof equipment .
• Suitable for hazardous areas in Zones 1 and 2 (gas) and Zones 21 and 22 (dust) .

Optional Features:

• Modular combination for space efficiency (HRMD92).
• Sound-light alarms for system failure notifications.
• Customizable cable entry points and internal component layout .

Summary

Portuguese explosion-proof distribution boxes are designed for hazardous industrial environments, offering robust enclosures, flexible circuit configurations, and compliance with international explosion-proof standards. Typical dimensions range from compact units (~218×310×390 mm) to larger enclosures (~672×720 mm), with IP54–IP66 protection, aluminum or stainless steel construction, and options for integrated control and alarm systems. These boxes are widely used in chemical, petroleum, natural gas, and pharmaceutical industries, particularly for heat tracing, freeze protection, and process temperature maintenance .