1.8/3kV RZ1-K (AS) Cable

What is RZ1-K (AS) 1.8/3kV Cable?

The RZ1-K (AS) 1.8/3kV cable is a low-voltage, unarmoured, flexible single-core power distribution cable rated at AC 1.8/3 (3.6)kV, manufactured with a Class 5 flexible stranded copper conductor, thermosetting XLPE core insulation, and a thermoplastic Low Smoke Zero Halogen (LSZH) outer protective sheath complying with IEC 60502-1, EN 60228, and Spanish standard UNE 21123-4. The “(AS)” designation indicates enhanced fire safety (Alta Seguridad), certifying advanced flame retardancy and non-propagation under severe fire conditions.

Engineered for high-traffic public installations and critical industrial power runs, the cable utilizes high-flexibility stranded copper to ensure effortless routing through tight conduit bends and cable trays. Its XLPE insulation delivers superior dielectric performance and thermal stability up to 90°C, while the dual-certified ST8/DMZ-E LSZH jacket prevents the release of corrosive halogen acid gases and suppresses dark smoke emissions, maintaining visibility along emergency evacuation corridors and protecting delicate electronics from acidic damage.

RZ1-K (AS) 1.8/3kV Cable Construction

• Conductor: Class 5 flexible plain annealed copper conductor conforming to EN 60228, providing high electrical conductivity and excellent mechanical flexibility.
• Insulation: Cross-Linked Polyethylene (XLPE) delivering high dielectric strength, low electrical losses, continuous 90°C thermal endurance, and 250°C short-circuit withstand capability.
• Bedding / Assembly: Direct extruded single-core layout offering a streamlined outer profile for rapid pulling and effortless glanding.
• Screen / Armour: Unarmoured, lightweight profile engineered for flexible handling, reduced structural tray load, and non-magnetic operation in high-amperage AC networks.
• Outer Sheath: Thermoplastic Low Smoke Zero Halogen (LSZH) compound meeting Type ST8 per IEC 60502-1 and Type DMZ-E per UNE 21123-4.
• Environmental Protection: Formulated for UV resistance (EN 50618 & UNE 211605), AD2 abrasion resistance, acceptable oil and chemical resistance, and AD7 immersion water resistance (up to 2 months).
• Sheath Colour: Green or Black.

Applications

RZ1-K (AS) 1.8/3 (3.6)kV flexible single-core power cables are specifically engineered for fixed power distribution circuits in public facilities, high-density transport infrastructures, and heavy industrial facilities where enhanced fire reaction and low-smoke zero-halogen performance are required.

• Public Infrastructure & Transport Hubs: Primary electrical feeds in passenger airport terminals, underground metro stations, railway concourses, hospitals, and educational institutions.
• Commercial Buildings & High-Rises: Main electrical risers, switchboard interconnects, and distribution corridors in shopping malls and high-density office towers.
• Industrial Processing Facilities: Variable speed drive feeds, generator connections, and factory sub-stations requiring high flexibility for routing through complex cable tray networks.
• Outdoor & Moist Environments: Cable runs installed in open air, raceways, or damp service corridors requiring UV resistance and AD7 temporary immersion resistance.

Specifications & Dimensions

The RZ1-K (AS) 1.8/3kV cable range encompasses 7 single-core cross-sectional sizes from 95mm² up to 400mm². Nominal outer diameters span from 19.0mm (95mm²) to 34.8mm (400mm²), with nominal cable weights ranging between 993 kg/km and 3,643 kg/km. Operating at an AC rating of 1.8/3 (3.6)kV, the cable supports service temperatures from -30°C to +60°C (down to -40°C for fixed installations) and a maximum conductor operating temperature of 90°C. Minimum bending radii range from 190mm down to 152mm after installation for 95mm², and up to 348mm during installation for 400mm². Maximum conductor DC resistance values at 20°C range from 0.206 Ω/km (95mm²) down to 0.0486 Ω/km (400mm²), with AC resistance at 90°C spanning 0.263 Ω/km to 0.0620 Ω/km. Current-carrying capacity ratings reach up to 558A in air (30°C, IEC 60364-5-52 Method F) and 823A buried in ground (20°C, Method D2), adhering strictly to IEC 60502-1 and UNE 21123-4 manufacturing standards.

Standards

Design & Testing Standards: IEC 60502-1, EN 60228, UNE 21123-4
Flame Non-Propagation: IEC/EN 60332-1, IEC/EN 60332-3 (Bunched vertical flame propagation)
Halogen-Free Emission: IEC/EN 60754-1/2 (Zero halogen acid gas release)
Smoke Density: IEC/EN 61034 (Low optical smoke, light transmittance >60%)
Environmental & Mechanical Ratings: UV resistant (EN 50618 & UNE 211605), AD7 water immersion (limited to 2 months), AD2 abrasion resistance, chemical and oil resistant
Voltage & Thermal Limits: Uo/U (Um): 1.8/3 (3.6)kV; Test Voltage: 6.5kV AC / 15kV DC; Conductor Operating Temp: 90°C; Short-Circuit Temp: 250°C (t ≤ 5s)
Regulatory Compliance: European Regulation EN 50575 (CPR Compliant), Low Voltage Directive 2014/35/EU, CE Marked, RoHS Directive 2015/65/EU, REACH EC 1907/2006

Frequently Asked Questions

Q: What does the “(AS)” designation mean in RZ1-K (AS) cables?
A: The “(AS)” marking stands for “Alta Seguridad” (High Safety), certifying that the cable complies with stringent vertical bunched flame retardancy tests (IEC/EN 60332-3) and releases zero halogen acid gases with minimal smoke during a fire.

Q: What is the primary difference between Class 2 stranded and Class 5 flexible conductors?
A: Class 5 conductors consist of numerous fine copper strands, providing superior bending flexibility and ease of handling compared to standard Class 2 rigid stranded conductors, significantly simplifying installation inside tight enclosures and cable trays.

Q: Can RZ1-K (AS) cable be installed in wet locations or submerged in water?
A: The cable possesses AD7 water immersion resistance, permitting installation in damp areas or temporary submersion in water limited to a continuous duration of up to 2 months.

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

RZ1-K – Why Choose Huadong Cable?

Huadong Cable Group manufactures RZ1-K (AS) 1.8/3 (3.6)kV flexible LSZH power cables in strict conformity with IEC 60502-1 and UNE 21123-4 specifications, validated through rigorous type and routine testing in ISO/IEC 17025 accredited facilities. Utilizing 99.99% high-purity electrolytic copper drawn into Class 5 flexible conductors, our extrusion lines apply dry-cured XLPE insulation to guarantee exceptional dielectric performance, low dielectric loss, and continuous thermal stability up to 90°C. Encapsulated in a dual-certified ST8 / DMZ-E halogen-free outer sheath, our cables ensure superior fire non-propagation, optical smoke clarity, and resistance to environmental UV radiation.

With more than 20 years of dedicated cable manufacturing expertise, Huadong Cable Group operates high-speed multi-wire bunching lines, continuous extrusion machinery, and polymer compounding workshops certified to ISO 9001, CE, CPR (EN 50575), RoHS, and REACH protocols. By supplying directly from our manufacturing base, we offer competitive factory pricing, 100% Mill Test Certificates (MTC) tested in accredited testing facilities, customized continuous drum lengths packaged on ISPM 15 heat-treated export wooden reels, and seamless door-to-port logistics for EPC contractors and infrastructure builders worldwide.