DFW-12 cable distribution box
DFW-12 cable distribution box is an outdoor power distribution enclosure designed for underground cable branching, connection, and distribution in medium voltage power networks up to 12kV. The housing is entirely constructed of stainless steel or cold-rolled steel plate, with a powder-coated surface thickness of 2mm, providing strong corrosion resistance and mechanical strength suitable for long-term outdoor installation in harsh environmental conditions.
The top cover features a double-layered air-jacketed structure with concealed ventilation holes — the air inlet is located at the bottom of the housing, and the air outlet is located at the top, hidden under the eaves, creating a natural top-down convection airflow that effectively dissipates internal heat without compromising weather protection. A removable partition with cable entry/exit openings is located at the bottom of the housing to prevent small animals and vermin from entering while maintaining good thermal insulation and ventilation performance.
Technical Specifications
| Item | Specification |
|---|---|
| Rated Voltage | 12kV |
| Rated Frequency | 50Hz / 60Hz |
| Rated Current | 630A (main circuit) |
| Rated Short-time Withstand Current (Icw) | 20kA / 25kA (4s) |
| Rated Peak Withstand Current (Ipk) | 50kA / 63kA |
| Housing Material | Stainless steel (304/316) or Cold-rolled steel plate (optional) |
| Surface Treatment | Epoxy powder coating, thickness ≥ 2mm |
| Coating Weathering Resistance | ≥ 10 years outdoor exposure without significant degradation |
| Degree of Protection | IP33 / IP44 / IP54 (optional) |
| Cable Entry | Bottom-entry, removable partition with multiple cable openings |
| Cable Termination Type | Dry-type plug-in connectors (EN 50180/50181 bushing interface) or conventional cable lugs |
| Max. Number of Cable Circuits | 2–4 incoming + 4–8 outgoing (configurable) |
| Enclosure Dimensions (W×D×H) | Customizable per project requirements |
| Standards | GB/T 7251, IEC 61439 |
Key Features
- Durable Steel Enclosure: Housing constructed from stainless steel (304/316 grade for coastal or corrosive environments) or heavy-duty cold-rolled steel plate with minimum 2mm epoxy powder coating — providing exceptional mechanical impact resistance, UV stability, and corrosion protection for reliable outdoor service exceeding 10 years without maintenance
- Double-Layered Ventilation System: The patented double-layered air-jacketed roof structure with concealed intake and exhaust vents creates natural convection airflow — internal heat generated by cable connections and busbars rises and exits through the top vents, while cool air enters from the bottom, maintaining safe internal operating temperatures without fans or active cooling
- Anti-Animal Entry Protection: A removable sealed partition at the cable entry point prevents small animals, rodents, snakes, and insects from entering the enclosure while maintaining ventilation performance — critical for underground cable installations in rural and suburban environments where vermin intrusion is a common cause of distribution network faults
- Concealed Vent Design: All ventilation openings are positioned under the roof eaves, preventing direct ingress of rain, snow, or wind-blown water while maintaining full airflow — enabling IP44 protection level without compromising thermal performance
- Modular Cable Compartment: Flexible internal configuration supports multiple cable circuit arrangements (2–4 incoming + 4–8 outgoing) using either dry-type separable connectors for quick tool-free connection or conventional lug-type termination for traditional cable installations
- Corrosion-Resistant Hardware: All external bolts, hinges, door handles, and locking mechanisms are manufactured from stainless steel to prevent rust and seizing over extended outdoor service life
- Compact and Aesthetic Design: Low-profile appearance suitable for installation in urban environments including sidewalks, green spaces, roadside verges, and public areas without visual obstruction
Applications
- Underground cable branching and distribution in urban power networks
- Residential community and commercial complex cable distribution
- Industrial park cable transition and connection points
- Street lighting and public infrastructure power distribution
- Wind farm and solar farm cable collection and distribution
- Temporary construction site power distribution