35kV Concentric Neutral Underground Power Cable
The 35 kV Concentric Neutral Power Cable is a high-performance medium-voltage underground cable designed for primary distribution systems. It features a stranded conductor, semi-conducting shields, tree-retardant TR-XLPE or EPR insulation, helically applied bare copper concentric neutral wires, and a sunlight-resistant LLDPE jacket. This construction provides excellent electrical performance, superior resistance to water treeing, and robust mechanical protection suitable for direct burial or duct installations. Available in various conductor sizes and insulation levels, the cable ensures safe and efficient power delivery. Manufactured to the latest ICEA S-94-649 and AEIC CS8 standards, the 35 kV Concentric Neutral Power Cable undergoes extensive quality testing to deliver consistent low dielectric loss and long service life in demanding underground environments.
- Standards ICEA S-94-649, AEIC CS8
- Voltage Rating 35 kV (100% or 133% insulation level)
- Insulation TR-XLPE or EPR (345/420 mils typical)
- Configuration Single conductor with concentric neutral
- Jacket Black LLDPE (sunlight resistant)
- Partial Discharge ≤5 pC at 200 V/mil
Construction
Technical Specifications
Quality Control
Application
Construction
35kV Concentric Neutral Underground Power Cable
Key Product Features
Concentric neutral for effective shielding and grounding
Tree-retardant insulation (TR-XLPE or EPR) for enhanced longevity
Robust LLDPE jacket for mechanical and sunlight protection
Excellent moisture and corrosion resistance
Optimized for direct burial and underground duct systems
Tree-retardant insulation (TR-XLPE or EPR) for enhanced longevity
Robust LLDPE jacket for mechanical and sunlight protection
Excellent moisture and corrosion resistance
Optimized for direct burial and underground duct systems
Conductor
Stranded copper or aluminum
Concentric Neutra
Bare copper wires (full or reduced)
Operating Temperature
90°C continuous, 130°C emergency, 250°C short-circuit
Insulation Shield
Semi-conducting XLPE/EPR
Technical Specifications
35kV Concentric Neutral Underground Power Cable
Circular Type Concentric Cables
Flat Type Concentric Cables
| Size | Phase Conductor | XLPE Insulation | Neutral Conductor | XLPE Sheath | Approx.Weight | |||||
| Structure | O.D | Thickness | O.D | Structure | O.D | Thickness | O.D | CU | AL | |
| AWG | No./mm | mm | mm | mm | No./mm | mm | mm | mm | kg/km | kg/km |
| 2x8 | 7/1.23 | 3.69 | 1.14 | 5.97 | 25/0.65 | 7.27 | 1.14 | 9.84 | 202 | 97 |
| 2x10 | 7/0.98 | 2.94 | 1.14 | 5.22 | 25/0.52 | 6.26 | 1.14 | 8.83 | 141 | 74 |
| Size | Phase Conductor | XLPE Insulation | Inner Sheath |
Neutral Conductor |
XLPE Sheath | Approx.Weight | ||||
| Structure | O.D | Thickness | O.D | Thickness | Structure | Thickness | O.D | CU | AL | |
| AWG | No./mm | mm | mm | mm | mm | No./mm | mm | mm | kg/km | kg/km |
| 3x8 | 7/1.23 | 3.69 | 1.14 | 5.97 | 0.7 | 65/0.41 | 1.14 | 16.59x10.62 | 396 | 227 |
| 3x6 | 7/1.55 | 4.65 | 1.14 | 6.93 | 0.7 | 65/0.52 | 1.14 | 18.73x11.80 | 551 | 297 |
| 3x4 | 7/1.96 | 4.98 | 1.14 | 8.16 | 0.7 | 65/0.65 | 1.52 | 22.21x14.05 | 830 | 427 |
| 3x2 | 7/2.47 | 7.41 | 1.14 | 9.69 | 0.7 | 65/0.83 | 1.52 | 25.63x15.94 | 1233 | 587 |
Quality Control
35kV Concentric Neutral Underground Power Cable
Raw Material Test
Raw Material Test for the 35 kV Concentric Neutral Power Cable involves rigorous evaluation of conductor materials and insulation compounds. Chemical analysis confirms copper or aluminum purity and alloy composition. Mechanical properties such as tensile strength, elongation, and hardness are tested to meet required specifications. TR-XLPE or EPR insulation compounds undergo thermal stability, dielectric strength, and tree-retardant performance testing. Semi-conducting materials and jacket compounds are evaluated for compatibility and UV resistance. Detailed surface and dimensional inspections identify any potential defects before processing. Only fully compliant raw materials are released for stranding and extrusion in the production of the 35 kV Concentric Neutral Power Cable. This comprehensive raw material validation establishes the foundation for superior electrical performance, mechanical strength, and long-term reliability in medium-voltage underground applications.
Process inspection
Process Inspection throughout manufacturing of the 35 kV Concentric Neutral Power Cable focuses on precision and consistency. Conductor stranding is monitored to achieve exact dimensions with continuous quality checks. Triple tandem extrusion of conductor shield, insulation, and insulation shield ensures clean interfaces and uniform thickness. Concentric neutral wire application uses automated tension control for even helical winding. Jacket extrusion parameters are strictly controlled for proper thickness and adhesion. Frequent in-line diameter measurements and visual inspections catch anomalies immediately. Environmental and process variables are logged to prevent contamination. Intermediate samples undergo partial discharge and electrical spot testing. Any non-conformance prompts swift corrective measures. These detailed process controls protect the integrity and performance characteristics of the 35 kV Concentric Neutral Power Cable, resulting in a uniform, high-quality medium-voltage underground cable.
Finished Product
Every completed reel of 35 kV Concentric Neutral Power Cable passes comprehensive Finished Product testing. Dimensional inspections verify overall diameter, insulation thickness, and concentric neutral coverage. DC resistance, high-voltage AC, and partial discharge tests confirm compliance with ICEA and AEIC standards. Mechanical testing validates tensile strength and elongation properties. Full visual examination ensures a smooth, defect-free surface with uniform jacket. All tests adhere strictly to applicable standards, with complete documentation and batch traceability maintained. Packaging and labeling are inspected for accuracy. Only the 35 kV Concentric Neutral Power Cable that meets every quality criterion receives final approval. This final assurance stage guarantees customers a premium concentric neutral cable with proven dielectric strength, moisture resistance, and durability for reliable medium-voltage underground distribution.
Application
The 35 kV Concentric Neutral Power Cable is widely used in underground primary distribution networks, URD systems, feeder circuits, substation connections, and municipal power grids requiring reliable medium-voltage underground cable with effective neutral grounding.
Technical Advantages
● 30+ years of manufacturing experience
● ISO and UL certified production
● Customized cable and transformer solutions
Product Packaging
Wires and Cables packaging (1)
Wires and Cables packaging (2)
Wires and Cables packaging (3)
Wires and Cables packaging (4)
Wires and Cables packaging (5)
Wires and Cables packaging (6)
Wires and Cables packaging (7)
Wires and Cables packaging (8)
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What are the advantages of power cables and overhead lines?(1) Reliable operation, because it is installed in a hidden place such as underground, it is less damaged by external forces, has less chance of failure, and the power supply is safe, and it will not cause harm to people; (2) The maintenance workload is small and frequent inspections are not required; (3) No need to erect towers; (4) Help improve power factor.
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Which aspects should be considered when choosing the cross section of a power cable?(1) The long-term allowable working current of the cable; (2) Thermal stability once short circuited; (3) The voltage drop on the line cannot exceed the allowable working range.
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What are the measures for cable fire prevention?(1) Use flame-retardant cables; (2) Use fireproof cable tray; (3) Use fireproof paint; (4) Fire partition walls and fire baffles are installed at cable tunnels, mezzanine exits, etc.; (5) Overhead cables should avoid oil pipelines and explosion-proof doors, otherwise local pipes or heat insulation and fire prevention measures should be taken.
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What should be paid attention to during the transportation and handling of cables?(1) During transportation, loading and unloading, cables and cable reels should not be damaged. It is strictly forbidden to push the cable reels directly from the vehicle. Generally, cables should not be transported and stored flat. (2) Before transporting or rolling the cable reel, ensure that the cable reel is firm, the cable is wound tightly, the oil pipe between the oil-filled cable and the pressure oil tank should be fixed without damage, the pressure oil tank should be firm, and the pressure indication should meet the requirements.
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What inspections should be carried out for the acceptance of cable lines?(1) The cable specifications should meet the regulations, the arrangement should be neat, no damage, and the signs should be complete, correct and clear; (2) The fixed bending radius of the cable, the related distance and the wiring of the metal sheath of the single-core power cable should meet the requirements; (3) The cable terminal and the middle head should not leak oil, and the installation should be firm. The oil pressure of the oil-filled cable and the meter setting should meet the requirements; (4) Good grounding; (5) The color of the cable terminal is correct, and the metal parts such as the bracket are completely painted; (6) There should be no debris in the cable trench, tunnel, and bridge, and the cover should be complete.
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