DFW-12 European-Style Cable Branch Box
Overview
The European-style cable branch box is a widely used component in modern underground power distribution systems. Its key features include double-door access, the use of wall-through bushings as busbar connections, a compact length, clear cable arrangement, and no need for wide-span crossing of three-core cables. The cable connectors used comply with DIN 47636 standards, typically employing 630A bolted fixed cable connectors for reliable performance.
Model Designation
Operating Conditions
Ambient temperature: Maximum +40°C, Minimum -30°C
Relative humidity:
Daily average ≤ 95%
Monthly average ≤ 95%
Wind speed: Equivalent to 34 m/s (≤ 700 Pa)
Anti-seismic performance:
Horizontal acceleration ≤ 0.4 m/s²
Vertical acceleration ≤ 0.15 m/s²
Installation tilt: ≤ 3°
Installation environment: Free from corrosive or flammable gases, water vapor, and heavy pollution. The site should be free from severe vibration.
Note: For use beyond these conditions, please consult the manufacturer.
Main Technical Parameters
Rated voltage: 12kV
Rated current: 630A
Dynamic withstand current: 50kA / 0.3s
Thermal withstand current: 20kA / 3s
Power frequency withstand voltage (1 min): 42kV
DC withstand voltage (15 min): 52kV
Lightning impulse withstand voltage: 105kV
Enclosure protection rating: IP33
