AHXCMK 12/20 (24)kV Cable

What is AHXCMK 12/20 (24)kV Cable?

The AHXCMK 12/20 (24)kV Cable is a specialized aluminium conductor medium-voltage power distribution cable manufactured in accordance with European standard HD 620 S2: 2010 Part 10 Section F/M. It is designed for 20kV electrical utility networks, primary sub-transmission circuits, industrial plant sub-distribution, and substation transformer connections requiring dependable operation in both indoor and outdoor environments.

The Nordic and European designation details each structural element: A specifies a circular stranded aluminium conductor; HX denotes Cross-Linked Polyethylene (XLPE) insulation with extruded semi-conductive field screens; C represents an anti-shock metallic screen consisting of concentric copper wires and equalizing copper tape; and MK signifies a heavy-duty waterproof Polyethylene (PE) outer protective sheath. Featuring longitudinal conductor waterblocking and an installation bending radius of 10 times the overall diameter, the cable facilitates routing through tight curves, electrical shafts, and outdoor duct runs.

AHXCMK 12/20 (24)kV Cable Construction

• Conductor: Waterproof, round stranded aluminium conductor (aluminium rope) engineered to prevent longitudinal water migration.
• Conductor Screen: Extruded semi-conductive plastic layer bonded directly over the conductor to eliminate electrical stress concentrations.
• Insulation: High-grade Cross-Linked Polyethylene (XLPE) compound providing dielectric strength and continuous thermal endurance up to +90°C.
• Insulation Screen: Extruded semi-conductive plastic bonded to the XLPE insulation layer for uniform radial electrostatic field distribution.
• Anti-Shock Protection (Screen): Layer of concentric copper wires bound with an equalizing copper strip to provide earth-fault protection and touch-safety.
• Outer Sheath: Heavy-duty waterproof Polyethylene (PE) jacket offering resistance against moisture ingress, abrasion, and environmental tearing.
• Sheath Colour: Industrial Black.

Applications

AHXCMK 12/20 (24)kV cables provide power transmission across indoor and outdoor medium-voltage installations:

• Public & Private Utility Grids: Primary 20kV municipal distribution circuits connecting distribution substations, ring main units (RMUs), and step-down transformers.
• Indoor Industrial & Commercial Complexes: Power distribution through cable trays, riser shafts, and concrete service ducts inside manufacturing facilities and commercial structures.
• Outdoor Distribution Ducts & Cable Trenches: Installation in external duct banks, open trenches, and raceways subject to humidity and moisture exposure.
• Renewable Generation Collector Networks: MV collector circuits routing power from wind farm turbine base units and central solar photovoltaic inverter substations.

Specifications & Dimensions

Huadong Cable Group manufactures AHXCMK 12/20 (24)kV cables across single-core configurations from 400/35mm² up to 1200/35mm² and three-core assemblies from 50/16mm² up to 300/35mm². Rated for 12/20 (24)kV within an operating temperature range of -20°C to +90°C (short-circuit limit of +250°C for 5 seconds), single-core cables feature nominal overall outer diameters from 46mm to 66mm and unit weights from 2,240 kg/km to 5,170 kg/km with a maximum pulling force of 20 kN, while three-core cables feature overall outer diameters from 53mm to 81mm and unit weights spanning 1,780 kg/km to 5,530 kg/km with permissible pulling forces from 7.50 kN to 20 kN. Conductor DC resistance values at 20°C strictly conform to international standards (from 0.641 Ω/km for 50mm² down to 0.0247 Ω/km for 1200mm²), maintaining an installation bending radius of 10 times the overall diameter in strict accordance with HD 620 S2: 2010 Part 10 Section F/M specifications.

Standards

Design & Material Standards: HD 620 S2: 2010 Part 10 Section F/M
Electrical & Voltage Ratings: Voltage Rating Uo/U (Um): 12/20 (24)kV; Conductor Max Operating Temp: +90°C; Short Circuit Limit (5s): +250°C
Thermal & Mechanical Performance: Operating Temperature: -20°C to +90°C; Minimum Bending Radius: 10 × OD; Maximum Pulling Force: up to 20 kN
Protection Systems: Waterproof round aluminium conductor; Anti-shock protection layer (copper wires and copper strip); Waterproof PE outer sheath
Regulatory Compliance: European Regulation EN 50575 (CPR Compliant), Low Voltage Directive 2014/35/EU, RoHS Directive 2015/65/EU, REACH EC 1907/2006, CE Marked

Frequently Asked Questions

Q: What is the function of the anti-shock protection layer in AHXCMK cables?
A: The anti-shock protection layer consists of concentric copper wires bound by an equalizing copper strip; it provides a low-impedance path to earth during electrical faults, preventing lethal touch-voltages and shielding the core against external electromagnetic interference.

Q: What advantage does the 10 x OD bending radius provide during installation?
A: A minimum bending radius of 10 times the overall diameter allows for tighter turns compared to conventional 15 x OD medium-voltage cables, simplifying routing inside switchgear cubicles, cable risers, and compact underground utility vaults.

Q: How does the waterproof aluminium conductor protect the cable core?
A: The stranded aluminium conductor incorporates waterblocking fillers to prevent longitudinal moisture migration along the strand interstices, ensuring electrical stability even if the outer sheath suffers localized damage.

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.

AHXCMK 12/20 (24)kV Cable – Why Choose Huadong Cable?

Huadong Cable Group manufactures AHXCMK 12/20 (24)kV medium-voltage cables in strict compliance with HD 620 S2: 2010 Part 10 Section F/M standards. Utilizing high-purity electrical aluminium rod, our stranding machinery produces compacted circular conductors integrated with waterblocking agents to prevent longitudinal moisture propagation. In our catenary continuous vulcanization (CCV) triple-extrusion lines, the semi-conductive conductor screen, high-cleanliness XLPE insulation, and semi-conductive insulation screen are applied simultaneously under pressurized dry nitrogen curing, ensuring void-free interfaces and minimal partial discharge levels.

Backed by more than 20 years of precision cable engineering expertise, Huadong Cable Group operates testing facilities accredited under ISO/IEC 17025 and certified to ISO 9001 and CE quality frameworks. Direct factory supply eliminates intermediary agent 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 and EPC contractors worldwide.