On modern airport aprons, after an aircraft lands and docks at the passenger boarding bridge (PBB), the pilot typically shuts down the main engines and Auxiliary Power Unit (APU) to conserve jet fuel and reduce carbon emissions. During this turn-around time, the electricity required by the aircraft is entirely transferred to the Ground Power Unit (GPU) or bridge-mounted power supply systems.
The critical component connecting the ground power source to the aircraft's power receptacle is the 400Hz Airport GPU Plum Blossom Cable.
Why Use a Special "Plum Blossom Structure" Cable for Airport Ground Power?
The tarmac environment is exceptionally harsh, where standard heavy-duty cables quickly wear out or fail. The GPU Plum Blossom Cable has become the industry standard for boarding bridges and mobile GPU carts due to its specialized structural and material design:
1. Unique "Plum Blossom Composite Structure" Built for Continuous Reel Dragging
GPU cables undergo high-frequency reeling, dragging across concrete aprons, and severe torsional flexing. Standard round multi-core cables are prone to internal stress concentration, leading to core breakage.
Plum Blossom Configuration: Power cores and control wires are twisted together in a distinctive cloverleaf/plum-blossom pattern. This allows uniform distribution of mechanical stress during pulling, bending, and twisting, dramatically increasing tensile strength and tear resistance.
2. Optimized for 400Hz Frequency Transmission & EPR Insulation
Aircraft electrical systems universally operate on 400Hz high-frequency AC power. High-frequency power transmission creates a skin effect and elevated operating temperatures.
EPR (Ethylene Propylene Rubber) Insulation: High-grade EPR insulation delivers superior dielectric performance, thermal resistance, and flexibility. It maintains stable electrical properties under heavy load and mid-frequency transmission while keeping the cable highly flexible even in extreme cold.
3. High Wear-Resistant & Waterproof "Yellow PUR" Outer Sheath
The airport ramp area exposes cables to hydraulic oils, fuel spills, intense UV radiation, standing water, and heavy mechanical friction.
Yellow PUR (Polyurethane) Outer Jacket: The tough PUR compound provides exceptional abrasion resistance, tear strength, oil resistance, and waterproofing. The bright yellow color provides high visual visibility to prevent night-time vehicle run-overs on the tarmac.
Technical Specifications & Selection Guide
In practical airport ground support equipment (GSE) installations, GPU power cables integrate main power conductors with control cores (used for interlock signals, temperature monitoring, and voltage sensing). The two most widely adopted configurations include:
|
Specification Structure |
Structural Design |
Typical Application |
|
4×(1×70+4×1mm²) |
4 main power cores of 70mm², each containing 4×1mm² control conductors in a plum blossom composite layout. |
Standard heavy-duty 400Hz GPU power supply for commercial narrow-body and wide-body aircraft at boarding bridges. |
|
2×(1×120+4×1mm²) |
2 main power cores of 120mm² with integrated 4×1mm² control cores for higher current capacity. |
High-ampere applications, long-distance power runs, or specific heavy aircraft power requirements. |