RZ1-K (AS) Halogen-Free Flexible Power Cable 3G 4mm2 6mm2 LSOH 0.6/1kV Copper Conductor and XLPE Insulation

The RZ1-K (AS) Halogen-Free Flexible Power Cable stands out in the electrical engineering landscape due to its meticulously engineered specifications, which cater to both performance and safety-critical applications. At its core, the cable is designed as a 3-core (3G) system, a configuration optimized for three-phase power distribution—the standard in industrial, commercial, and large-scale residential settings. This 3G design ensures balanced current flow across phases, minimizing energy loss and reducing strain on connected equipment, from high-power motors in manufacturing plants to HVAC systems in commercial complexes.

The cable is available in two conductor cross-sectional areas: 4mm² and 6mm². These dimensions are strategically chosen to cover a broad range of current-carrying requirements. The 4mm² variant is ideal for applications such as powering lighting systems, small to medium-sized machinery, and sub-distribution panels in commercial buildings, where the maximum current demand typically ranges from 20A to 32A. The 6mm² option, with its larger conductor size, is better suited for higher-load scenarios, including heavy-duty industrial equipment, large air conditioning units, and main distribution lines in industrial facilities, supporting currents up to 45A under standard operating conditions. Both sizes utilize high-purity electrolytic Copper Conductors, selected for their exceptional electrical conductivity (≥100% IACS) and malleability. The Copper Strands are finely drawn and twisted to enhance Flexibility, allowing the cable to bend smoothly around corners, navigate tight conduits, and withstand repeated movement in semi-mobile applications—such as connecting portable industrial tools or temporary power setups—without compromising structural integrity.

Insulation is a critical component of the RZ1-K (AS) cable, and here, cross-linked polyethylene (XLPE) takes center stage. XLPE is produced through a chemical or radiation-induced cross-linking process that transforms the polymer structure into a three-dimensional network, significantly enhancing its thermal, mechanical, and electrical properties compared to standard polyethylene. This insulation can withstand continuous operating temperatures up to 90°C, with short-term overload capacities reaching 130°C, making it suitable for environments where ambient temperatures are elevated—such as near boilers, furnaces, or industrial ovens. Additionally, XLPE offers superior dielectric strength (≥20kV/mm), ensuring reliable insulation even under high voltage stress, and excellent resistance to moisture, oils, and most industrial chemicals. This robustness prevents insulation breakdown, a common cause of cable failure, and extends the cable’s service life in harsh conditions.

The cable’s voltage rating of 0.6/1kV is another key specification, indicating it is designed for low-voltage power distribution. The 0.6kV figure refers to the phase-to-earth voltage, while 1kV denotes the phase-to-phase voltage, aligning with international standards for low-voltage systems (IEC 60038). This rating makes the RZ1-K (AS) cable compatible with most building electrical systems, industrial machinery, and infrastructure projects, where power is distributed from utility grids or on-site generators at these voltage levels.

A defining characteristic of the RZ1-K (AS) cable is its halogen-free composition, a material innovation that addresses critical safety concerns in fire scenarios. Traditional PVC-Insulated Cables contain halogens (chlorine, bromine, etc.), which, when burned, release hydrogen chloride gas—highly corrosive to metals and toxic to humans, capable of causing severe respiratory damage even in low concentrations. In contrast, the RZ1-K (AS) cable’s insulation and sheath are formulated without halogens, ensuring that in the event of combustion, emissions are limited to non-toxic, non-corrosive gases. This feature is particularly valuable in enclosed spaces such as high-rise buildings, hospitals, and data centers, where rapid smoke spread and toxic fumes can hinder evacuation and cause irreversible damage to sensitive equipment.

Complementing its halogen-free nature is the Low Smoke Zero Halogen (LSOH) sheath. The LSOH material is engineered to minimize smoke production during a fire, maintaining visibility for emergency responders and occupants. Tests conducted in accordance with IEC 61034 (Smoke Density) show that the cable’s smoke density rating (SDR) is below 50, significantly lower than the 200 threshold for standard PVC Cables. This low smoke output, combined with zero halogen emissions, aligns the cable with stringent fire safety standards such as EN 50575 (Railway Applications) and BS 6724 (UK Building Regulations), making it a preferred choice for transportation hubs, healthcare facilities, and public infrastructure where fire safety is paramount.

The mechanical durability of the LSOH sheath further enhances the cable’s performance. It exhibits high resistance to abrasion, impact, and UV radiation, making it suitable for both indoor and outdoor installations—from cable trays exposed to sunlight to underground conduits prone to soil pressure. The sheath also maintains flexibility at low temperatures (down to -30°C), ensuring ease of installation in cold climates, and remains stable at high temperatures, preventing cracking or melting under thermal stress.

The manufacturing of the RZ1-K (AS) cable adheres to strict quality standards, involving advanced processes that ensure consistency and reliability. The production begins with the selection of raw materials: high-purity copper rods for conductors, XLPE granules with halogen-free additives, and LSOH compounds for the sheath. Each material undergoes rigorous testing for compliance with international standards—copper is checked for conductivity and impurity levels, while XLPE and LSOH materials are tested for halogen content, thermal stability, and mechanical strength.

The Copper Conductors are produced through a series of steps: rod breakdown (drawing the rod into smaller diameters), annealing (heating to reduce brittleness), and stranding. Stranding involves twisting multiple fine Copper Wires together, a process that enhances flexibility compared to solid conductors. The number of strands varies by conductor size—4mm² conductors typically consist of 19 strands of 0.56mm diameter, while 6mm² conductors use 37 strands of 0.49mm diameter—ensuring optimal flexibility without sacrificing current-carrying capacity.

Next, the Stranded Conductors undergo insulation extrusion. The XLPE material is melted and extruded over the conductors in a continuous process, forming a uniform insulation layer. The extrusion is followed by cross-linking, where the cable is exposed to high temperatures (using steam or dry heat) to activate the cross-linking agents in the XLPE. This step is critical, as it transforms the thermoplastic polyethylene into a thermoset material, 赋予 it the enhanced properties discussed earlier. Post-cross-linking, the Insulated Conductors are cooled and checked for insulation thickness, concentricity, and freedom from defects using automated laser systems.

The three insulated conductors are then twisted together in a cabling process, forming the 3-core structure. This twisting is done with a precise lay length (the distance over which a conductor completes one full twist) to ensure uniform stress distribution and flexibility. A filling material—often a non-hygroscopic, halogen-free compound—is applied between the cores to fill gaps, providing roundness to the cable and preventing moisture ingress.

Finally, the LSOH sheath is extruded over the cabled cores. This extrusion process is carefully controlled to ensure a consistent sheath thickness (typically 1.0mm to 1.4mm, depending on conductor size) and adhesion to the underlying structure. The finished cable is then subjected to a series of tests, including:

Only cables that pass all these tests proceed to packaging and distribution, ensuring that every RZ1-K (AS) cable meets the highest quality benchmarks.

The RZ1-K (AS) cable’s combination of flexibility, safety, and performance makes it suitable for a diverse range of applications across multiple industries. In industrial settings, it is widely used in manufacturing plants, where its 3G design efficiently powers three-phase machinery such as conveyor belts, pumps, and compressors. The XLPE insulation’s resistance to oils and chemicals ensures longevity in environments where exposure to lubricants or cleaning agents is common, while its flexibility allows for easy routing around machinery and through tight spaces. The halogen-free and low-smoke properties are particularly valuable in factories with large workforces, as they reduce fire risks and facilitate safe evacuation.

In commercial buildings, the cable is a staple for power distribution in offices, shopping malls, and hotels. It is often installed in ceiling voids, wall cavities, and underfloor raceways, where its flexibility simplifies installation in complex building layouts. The LSOH sheath’s low smoke emission is critical in these spaces, as fires in enclosed areas can quickly become life-threatening due to smoke inhalation. Additionally, the cable’s ability to handle 0.6/1kV voltages makes it suitable for connecting main distribution boards to sub-panels, lighting systems, and HVAC units.

Healthcare facilities such as hospitals and clinics benefit significantly from the RZ1-K (AS) cable’s safety features. In environments where patients may be immobile or rely on life-support equipment, the risk of toxic fumes from burning cables is unacceptable. The halogen-free, low-smoke design minimizes this risk, while the cable’s durability ensures reliable power for critical systems such as operating theaters, intensive care units, and medical imaging equipment.

Data centers represent another key application area. These facilities house thousands of servers and networking equipment, generating significant heat and requiring uninterrupted power. The RZ1-K (AS) cable’s XLPE insulation withstands the high ambient temperatures, while its LSOH sheath prevents smoke from obscuring visibility or damaging sensitive electronics in the event of a fire. The 3G configuration efficiently distributes three-phase power to server racks, ensuring stable operation of mission-critical IT infrastructure.

Transportation infrastructure also relies on the RZ1-K (AS) cable. Airports, railway stations, and metro systems use the cable for powering lighting, security systems, and passenger information displays. Its flexibility is advantageous in these settings, where cables must often be routed through confined spaces or around structural obstacles. The fire safety properties are particularly important in transportation hubs with high passenger volumes, where rapid evacuation is essential in emergencies.

To ensure the RZ1-K (AS) cable reaches customers in pristine condition, meticulous attention is paid to packaging. The cable is wound onto sturdy wooden or steel reels, with dimensions tailored to the cable length and diameter. For 4mm² and 6mm² cables, common reel sizes include 250m, 500m, and 1000m lengths, allowing customers to select quantities that match their project requirements and minimize waste. The reels are constructed to withstand the rigors of transportation, with reinforced flanges to prevent cable damage during handling.

Each reel is wrapped in a heavy-duty polyethylene film to protect the cable from moisture, dust, and UV radiation during storage and transit. Labels are affixed to the reels, providing essential information such as cable type (RZ1-K (AS)), conductor size (4mm² or 6mm²), length, voltage rating, batch number, and compliance certifications (e.g., CE, UL). This labeling ensures traceability and helps customers verify that they have received the correct product.

For smaller quantities, the cable may be supplied in coils of 50m or 100m, packaged in cardboard boxes lined with moisture-resistant material. These boxes are designed for easy handling and storage, with handles for convenient transportation on job sites. Regardless of the packaging type, all materials used are recyclable, aligning with the cable’s halogen-free, environmentally conscious design philosophy.

Handling guidelines are included with each shipment to ensure proper installation and prevent damage. The cable should be stored in a dry, ventilated area, away from direct sunlight and extreme temperatures. When unwinding, the reel should be placed on a suitable stand to rotate freely, avoiding kinks or twists that could damage the insulation or sheath. Bending radii must be observed—for fixed installations, the minimum bending radius is 6 times the cable diameter, while for dynamic applications (where the cable is moved), it is 10 times the diameter. These guidelines help maintain the cable’s performance and longevity.

The RZ1-K (AS) cable is distributed globally, with a logistics network designed to ensure timely delivery and minimize transit damage. For domestic shipments, road transport is preferred, using vehicles equipped with reel-holding racks to secure the cargo. The reels are strapped to the racks to prevent movement during transit, reducing the risk of impact damage. For international shipments, the cable is transported via sea or air, depending on customer urgency. Sea freight is cost-effective for large quantities, with reels loaded into shipping containers and secured with dunnage to prevent shifting. Air freight is available for urgent orders, with smaller reels or coils packaged in crates to meet airline size and weight restrictions.

All shipments are accompanied by detailed documentation, including commercial invoices, packing lists, and certificates of conformity. These documents confirm that the cable meets relevant standards and facilitate customs clearance. For customers requiring it, additional documentation such as test reports (from the batch testing process) or material safety data sheets (MSDS) for the LSOH and XLPE materials can be provided.

The logistics team monitors each shipment using tracking systems, providing customers with real-time updates on their order status. In the event of delays or unforeseen issues, proactive communication ensures customers are informed and alternative arrangements can be made if necessary. This commitment to reliable logistics helps minimize project downtime for customers, whether they are working on tight construction schedules or urgent maintenance tasks.

Recognizing that customers may wish to evaluate the cable before placing large orders, a comprehensive sample policy is in place for the RZ1-K (AS) cable. Samples of both 4mm² and 6mm² variants are available, typically in 10m lengths, allowing customers to conduct physical inspections, flexibility tests, and compatibility checks with their equipment. Samples can be requested through the company’s website, sales team, or authorized distributors, with processing times of 1–3 business days.

While samples are provided free of charge for qualified customers (e.g., registered contractors, industrial buyers), shipping costs may apply. For international customers, samples are shipped via express courier to ensure timely delivery, with tracking information provided. Upon receipt, customers are encouraged to test the samples in their specific applications, and the technical support team is available to assist with any questions or provide guidance on installation and performance.

Customer support extends beyond sample provision, with a dedicated team of technical experts available to address inquiries related to cable selection, installation, and maintenance. Whether customers need help determining the appropriate conductor size for their load requirements, understanding compliance with local standards, or troubleshooting installation issues, the team provides prompt, accurate advice. Support is available via phone, email, or video consultation, ensuring accessibility for customers worldwide.

The RZ1-K (AS) cable is backed by a comprehensive warranty, reflecting confidence in its quality and durability. The standard warranty period is 10 years from the date of delivery, covering defects in materials and workmanship. This warranty ensures that if the cable fails due to manufacturing issues—such as insulation breakdown or sheath damage under normal operating conditions—the manufacturer will replace the defective portion or provide a full refund, at the customer’s option.

To claim under the warranty, customers must provide proof of purchase, details of the issue, and, if possible, photographs or test reports documenting the defect. The technical team will assess the claim and determine the appropriate resolution, with most claims processed within 5–7 business days. It is important to note that the warranty does not cover damage caused by improper installation, misuse, or environmental conditions beyond the cable’s specified operating range (e.g., exposure to temperatures exceeding 90°C continuously).

In addition to the warranty, after-sales service includes assistance with installation audits. For large projects, the technical team can conduct on-site inspections to verify that the cable is installed correctly, ensuring compliance with recommended bending radii, termination procedures, and environmental requirements. This proactive service helps prevent premature failure and ensures the cable operates at peak performance throughout its service life.

The manufacturer also maintains a network of authorized service partners in key regions, providing local support for maintenance and repairs. These partners are trained to handle cable-related issues, from minor sheath repairs to complete cable replacement, ensuring customers have access to timely service wherever they are located.