ARG7H1R Cable

What is ARG7H1R Cable?

The ARG7H1R Cable is a single-core aluminium conductor medium-voltage power distribution cable manufactured according to Italian standards CEI 20-13, CEI 20-16, and international standard IEC 60502. Engineered for primary energy transmission across voltage classes of 1.8/3 (3.6)kV, 6/10 (12)kV, 12/20 (24)kV, and 18/30 (36)kV, it links transformer substations with industrial distribution grids and heavy power users.

The Italian CEI code defines each structural layer: A specifies a compact circular stranded aluminium conductor; R represents extruded semi-conductive conductor and insulation screens; G7 denotes lead-free Hard Grade Ethylene Propylene Rubber (HEPR) dielectric insulation; H1 indicates a metallic screen composed of plain copper wires with a helically wound copper tape; and R designates a protective red Polyvinyl Chloride (PVC) outer jacket of Rz quality. Designed to comply with article 4.3.11 of the CEI 11-17 standard, ARG7H1R can be installed in open air, inside conduit tubes, in cable channels, or directly buried underground without additional mechanical protection.

ARG7H1R Cable Construction

• Conductor: Class 2 compact stranded circular aluminium conductor.
• Conductor Screen: Extruded semi-conductive compound applied over the conductor (standard on cables ≥ 6/10kV).
• Insulation: Hard Grade Ethylene Propylene Rubber (HEPR) compound of G7 quality, lead-free (Pb free), with continuous operating temperature of +90°C.
• Insulation Screen: Extruded semi-conductive compound bonded directly to the HEPR dielectric layer (standard on cables ≥ 6/10kV).
• Metallic Screen: Plain copper wires bound with an equalizing helically wound copper tape to carry single-phase short-circuit fault currents.
• Outer Sheath: Heavy-duty Polyvinyl Chloride (PVC) compound of Rz quality delivering tear, abrasion, and flame resistance.
• Outer Sheath Colour: Red.

Applications

ARG7H1R medium-voltage cables are engineered for primary energy transmission and power distribution across diverse commercial, utility, and heavy industrial installations:

• Substation Transformer Interconnects: Primary medium-voltage feeders routing electrical energy between step-down transformer rooms and major power-consuming facilities.
• Direct Underground Burial: Underground installation in soil trenches without auxiliary mechanical protection, complying strictly with art. 4.3.11 of the CEI 11-17 standard.
• Conduit Tubes & Underground Duct Banks: Pulled through buried duct pipes, tunnels, and raceways withstanding tensile loads up to 30 N/mm².
• Open Air & Open Passes: Fixed routing across outdoor steel structures, masonry walls, elevated cable ladders, and ventilated channels.
• Heavy Industrial Complexes: Main feeder circuits for chemical facilities, manufacturing complexes, and steel mills requiring the thermal and dielectric resilience of G7 HEPR elastomer.

Specifications & Dimensions

Huadong Cable Group manufactures single-core ARG7H1R cables across rated voltage levels of 1.8/3 (3.6)kV, 6/10 (12)kV, 12/20 (24)kV, and 18/30 (36)kV. In the 1.8/3kV class, conductor sizes span 25mm² to 630mm² with a standardized 2.0mm nominal insulation thickness, overall outer diameters from 16.0mm to 44.0mm, and weights from 315 kg/km to 3,150 kg/km; in the 6/10kV class, cross-sections span 35mm² to 630mm² with 3.4mm nominal insulation thickness, outer diameters from 23.0mm to 48.0mm, and weights from 535 kg/km to 3,150 kg/km; in the 12/20kV class, sizes range from 35mm² to 630mm² with 5.5mm nominal insulation thickness, outer diameters from 27.7mm to 54.0mm, and weights from 750 kg/km to 3,805 kg/km; and in the 18/30kV class, cross-sections from 35mm² to 630mm² utilize an 8.0mm nominal insulation thickness, outer diameters from 33.5mm to 60.2mm, and weights from 1,045 kg/km to 4,195 kg/km. Operating within a temperature range of -15°C to +90°C (short-circuit maximum +250°C, minimum installation temperature 0°C), conductor DC resistance at 20°C ranges from 1.20 Ω/km (25mm²) down to 0.0283 Ω/km (630mm²), supporting ampacities up to 907A in air and 743A buried, with a minimum installation bending radius of 12 times the outer diameter and maximum tensile stress of 30 N/mm² strictly adhering to CEI 20-13 and IEC 60502 standards.

Standards

Design & Material Standards: CEI 20-13, IEC 60502, CEI 20-16, IEC 60885-3
Installation Standard: Installations complying with art. 4.3.11 of CEI 11-17 standard
Flame Retardancy & Halogen Standard: Flame retardant to EN 60332-1-2; Halogen acid gas tested to EN 60754-1
Voltage Ratings: Voltage Uo/U (Um): 1.8/3 (3.6)kV, 6/10 (12)kV, 12/20 (24)kV, 18/30 (36)kV
Thermal & Mechanical Performance: Temperature rating: -15°C to +90°C; Min installation temp: 0°C; Max short circuit temp: 250°C; Min bending radius: 12 × OD; Max tensile stress: 30 N/mm²
Regulatory Compliance: RoHS Directive 2015/65/EU, REACH Regulation EC 1907/2006, CE Marked

Frequently Asked Questions

Q: What is the primary construction difference between ARG7H1R and ARG7H1(O)R cables?
A: ARG7H1R is a single-core cable featuring plain copper wires bound with a helically wound copper tape as its metallic screen, whereas ARG7H1(O)R is a three-core assembly utilizing plain copper tape screens around each core and an extruded filler (O) penetrating between the cores.

Q: What installation advantage is granted by CEI 11-17 article 4.3.11 compliance?
A: Compliance with article 4.3.11 of the CEI 11-17 standard certifies that the cable possesses adequate physical robustness to be laid directly in underground trenches without additional mechanical protection such as concrete troughs or metal conduit.

Q: Why does the HEPR insulation of G7 quality use a lead-free formulation?
A: Hard Grade Ethylene Propylene Rubber (HEPR) compound of G7 quality is formulated lead-free (Pb free) to satisfy modern European environmental directives (RoHS and REACH) while maintaining high dielectric strength, low water absorption, and thermal performance up to 90°C.

Q: What commercial payment terms does Huadong Cable accept for international orders?
A: We accept standard international commercial payment terms, primarily Telegraphic Transfer (T/T, with 30% advance deposit and 70% against shipping documents) and 100% Irrevocable Letter of Credit (L/C) at sight.

ARG7H1R Cable – Why Choose Huadong Cable?

Huadong Cable Group manufactures ARG7H1R single-core medium-voltage power cables in strict compliance with CEI 20-13, IEC 60502, and CEI 20-16 specifications. Utilizing high-purity electrical-grade aluminium rod, our stranding machinery produces compact circular Class 2 conductors that deliver geometric roundness and minimal electrical resistance. In our continuous vulcanization extrusion lines, lead-free HEPR (G7) insulation and semi-conductive screening compounds are co-extruded under computerized monitoring, preventing microscopic voids, maintaining wall concentricity, and keeping partial discharge levels well below industry thresholds.

Backed by more than 20 years of precision cable engineering expertise, Huadong Cable Group operates testing laboratories accredited under ISO/IEC 17025 and quality management systems certified to ISO 9001 and CE frameworks. Direct factory manufacturing eliminates middleman trading markups, allowing us to provide competitive factory pricing, 100% routine electrical and spark testing verified by certified Mill Test Certificates (MTC), continuous drum cuts packaged on heavy-duty ISPM 15 heat-treated export wooden reels, and dependable logistics for international electric utilities, heavy industrial facilities, and EPC contractors worldwide.