Burkina Faso Tunnel Power Distribution Box Specifications Table

Tunnel power distribution boxes for Burkina Faso should be designed as robust, IP-55 rated, outdoor-capable assemblies with copper busbars, MCCB protection, and heavy-duty cable entry points suitable for harsh tunnel environments.

General Construction

• Material: 2 mm galvanized steel sheet with reinforced channels for structural strength and durability in tunnel conditions (adapted from LT distribution box standards) .
• Roof Design: Slightly sloping with 50 mm overhang to prevent water ingress.
• Doors and Locks: Godrej-type 3-position locking system with concealed hinges; manual galvanized lock provision to prevent rusting .
• Earthing: Two solid earthing points on either side of the box.
• Protection Rating: IP-55 for dust and water ingress, verified by type test certificates from accredited labs .

Electrical Components

• Busbars: Copper flat bars, typically 25x4 mm for smaller LTDBs, with adequate clearance from the enclosure; insulated with color-coded tubing (Red, Yellow, Blue, Black) or phase-colored paint .
• MCCBs: 4-pole for main busbar, 3-pole for outgoing feeders; conforming to IS:13947 standards with magnetic trip release and manual reset .
• Neutral Protection: Unbalance current protection with test certification from approved labs .
• Cable Entry: Heavy-duty, double compression brass cable glands for incoming and outgoing cables; detachable plates for fixing .

Tunnel-Specific Features

• Voltage Levels: Step-down from 3300 V to 400 V / 230 V for machinery and 110 V for lighting, as required in long tunnels .
• Socket Outlets: Industrial BS EN 60309 rated 16A, 32A, 63A, 125A with RCD protection; pilot pins for Earth Continuity Monitoring at higher ratings .
• Transformers: Optional dual-output transformers for simultaneous 400 V and 110 V supply .
• Mobility: Plug-in or extendable assemblies to move forward with tunneling operations .
• Power Factor Correction: Optional PFC assemblies to offset reactive power from tunnel motors .

Dimensions and Identification

• Dimensions: Illustrative; tolerances ±10% over specified dimensions; internal lighting provision recommended .
• Identification: Purchaser's name, serial number, and non-detachable nameplate; marking for traceability .

Standards Compliance

• International Standards: BS6164 for tunnel electrical systems, IS:13947 for MCCBs, EN 60309 for industrial connectors .
• Testing: Type-test certificates from CPRI or government-approved laboratories for IP rating, MCCB performance, and insulation integrity . This specification framework ensures that tunnel power distribution boxes in Burkina Faso are robust, safe, and compliant with international tunnel electrical standards, while allowing customization for local voltage requirements and tunnel conditions.