400Hz ground power Cable: Unyielding Power for Airport GPU Reels

400Hz ground power Cable are among the most mechanically demanding applications in airport ground support. A cable that cannot handle continuous winding cycles, jet fuel splashes, and sub-zero winter mornings is a maintenance liability waiting to happen. The GP 400 TF DR TripleFlex Drum cable is engineered from the ground up for exactly this environment: motorized or spring-driven reels in Fixed Electrical Ground Power (FEGP) systems, where reliability is non-negotiable and downtime isn’t an option.

Key Engineering Advantages

Designed for Continuous Reel Cycling: The TripleFlex (TF) construction—with phase conductors stranded alongside tripled neutral cores and 24 control cores distributed in the interstices—gives this cable its hallmark resistance to torsional stress. Backed by an aramid fiber supporting screen, the cable maintains structural integrity through tens of thousands of winding and unwinding cycles.
Full-Spectrum Environmental Protection: The dual-layer design (a rape-yellow PUR inner sheath plus an orange PUR outer sheath) creates a robust barrier against chemical hazards common on airport aprons, including aviation hydraulic fluids, mineral oils, and de-icing agents. The cable remains pliable and safe at -40°C in flexible operation.
Halogen-Free for Enclosed Environments: Compliant with IEC 60754-1 safety standards, the halogen-free construction ensures that in the event of a fire, the cable does not release toxic halogen gases—a critical safety requirement for underground equipment rooms and passenger boarding bridges (PBBs).
High-Voltage Rated with Low-Capacity Insulation: With a nominal operating voltage of 0.6/1 kV (test voltage of 4,000 V AC), the low-capacity insulation design minimizes reactive power losses across the 400Hz frequency range, directly improving GPU energy efficiency.
Integrated Control Cores: Six groups of four 1.0 mm² control cores are integrated within the power structure, allowing the same cable assembly to handle both power delivery and precise monitoring/control signaling.

Technical Specifications

Parameter	Value
Product Type	400Hz Ground Power Supply Cable — TripleFlex Drum
Nominal Voltage (Uo/U)	0.6/1 kV
Test Voltage (core/core)	4,000 V AC
Power Core Construction	3×50 mm² + 3×10 mm² (bare copper strands)
Control Cores	6x(4×1.0) mm² (white, numbered 1–24)
Outer Diameter (approx.)	34.1 mm (for 3×50 mm² variant)
DC Resistance at 20°C	Max. 0.386 Ω/km (for 50 mm²)
Current Rating	168 A (per DIN VDE 0298)
Min. Bending Radius (Winding)	7.5 x OD (Repeated winding) / 10 x OD (Deflection pulleys)
Temperature Range (Flexible)	-40°C to +90°C
Outer Sheath	PUR (Orange) with Aramid fiber supporting screen
Safety Compliance	Halogen-Free (IEC 60754-1), Oil Resistant (EN 50363-10-2), RoHS

GP 400 TF DR 400Hz ground power supply cable TripleFlex Drum 3x50mm² rated 0.6/1kV for reeling application

(Engineering Note: Higher capacity variants such as 3×70+3×12+6x(4×1.0) mm² rated for 207 A are available. Contact our technical team for custom cross-sections and project-specific dimensions.)

Typical Installation Scenarios

Motorized Cable Reel Systems (PIT-in-Ground): The primary application. The cable is wound onto motorized drums recessed into the apron surface. The TripleFlex geometry handles the continuous load cycling without core fatigue.
Spring-Driven Overhead Reel Systems: Mounted on elevated structures at gates or hangars. The aramid support screen prevents core elongation under the tension loading of spring retraction.
Passenger Boarding Bridge (PBB) Power Reels: Serves as the dynamic reel cable between the fixed power source and the bridge-mounted connector, handling repeated extension cycles as each aircraft docks.
Scissor-Lift Cable Management: Highly compatible with scissor-lift cable carrier systems used in specific airport pier configurations.

Frequently Asked Questions (Technical & Procurement)

Q1: What is the difference between the TripleFlex Drum (TF DR) and the SymmetricalFlex Drum (SF DR)? Which should I specify?
A: Both are designed for 400Hz reeling applications and share the same dual-PUR sheath with aramid support. The SF DR uses a symmetrical arrangement for excellent electrical balance (ideal for strict EMC requirements). The TripleFlex Drum (TF DR) uses a triple-grouped layout, which results in a more compact outer diameter for a given current rating. If your reel manufacturer specifies strict core diameter constraints, the TF DR is typically the more space-efficient option.Q2: The cable will be used at an airport where winter temperatures reach -45°C. Is the GP 400 TF DR rated for this?
A: For flexible operation (active reeling and bending), the rated minimum temperature is -40°C. For static (fixed laying) conditions, the cable is rated to -50°C. In practice, many northern airports pre-warm their equipment rooms and reel pits, bringing the cable into the rated operating range before use. We recommend discussing your site’s thermal management with our engineers.Q3: Does this cable comply with halogen-free requirements for underground pit installations?
A: Yes. Both the inner and outer sheath compounds are halogen-free per IEC 60754-1 and VDE 0482-754-1. This is a hard requirement for PIT-in-ground installations and enclosed equipment rooms under most global airport authority standards.Q4: Can this cable be supplied pre-terminated with 400Hz connectors as a plug-and-play assembly?
A: Yes. As a direct manufacturer, TEBAOFLEX can supply the cable ready-to-install with pre-assembled 400Hz connectors (e.g., LPA Connection Systems or compatible connection sleeves). Each assembly is individually tested, eliminating field termination work and reducing installation risks for your EPC team.