WDZBN-YJY Medium Voltage Power Cable (8.7/15kV)

WDZBN-YJY is a halogen-free, low-smoke, flame-retardant, and fire-resistant medium-voltage power cable designed for safe and reliable power distribution in critical infrastructure. It maintains circuit integrity under fire conditions, making it ideal for high-rise buildings, data centers, hospitals, tunnels, and industrial facilities where safety requirements are extremely high.

• Conductor: Bare copper stranded conductor with excellent conductivity, flexibility, and mechanical strength.
• Insulation: Cross-linked polyethylene (XLPE) insulation with superior electrical properties, high heat resistance, and long-term reliability at continuous operating temperatures up to 90°C.
• Fireproof Layer: Specially designed fire barrier system to ensure circuit integrity during a fire.
• Metallic Shielding Layer: Copper tape shielding layer providing uniform electric field distribution and preventing electrical stress.
• Inner Sheath: Extruded halogen-free, low-smoke polymer compound.
• Outer Sheath: Black halogen-free, low-smoke, flame-retardant polyethylene (PE) sheath with excellent mechanical protection, chemical resistance, and UV stability.

• Rated Voltage: 8.7/15kV
• Fire Resistance: Class B flame retardant (IEC 60332-3), fire resistant (IEC 60331)
• Environmental Performance: Halogen-free, low-smoke, low-toxicity formula. Produces minimal smoke and no corrosive gases during combustion, ensuring visibility and safety for evacuation and firefighting personnel.
• Operating Temperature: Continuous conductor operating temperature 90°C; maximum short-circuit temperature 250°C (5 seconds)
• Certifications: Complies with relevant IEC and international standards; third-party certifications available upon request.

• Transportation Infrastructure: Subway tunnels, train stations, airport terminals, and port facilities—fire spread and smoke inhalation can have catastrophic consequences. The cable's 90-minute fire resistance ensures critical systems (signaling, emergency lighting, ventilation) remain operational during evacuation.
• High-Rise and Critical Buildings: Skyscrapers, hospitals, data centers, and government buildings—standards such as NFPA 70, IEC 60331, and GB 50217 require fire-safe power distribution systems. This cable is ideal for main feeders, emergency circuits, and life support systems.
• Industrial and Energy Facilities: Petrochemical plants, refineries, power plants, and renewable energy (wind/solar) power plants—these locations are exposed to high temperatures, chemicals, and mechanical stress. Low-smoke halogen-free sheathing and fire-resistant layers prevent the spread of fire and the release of toxic substances in hazardous areas.
• Underground and Enclosed Spaces: Subway tunnels, underground shopping malls, and utility corridors—smoke buildup in these locations limits visibility and endangers lives. The cable features a low-smoke, high-transmittance design to ensure safe evacuation and the visibility of firefighters.

• Size Selection and Coordination: Select conductor size according to IEC 60287 for current carrying capacity and short-circuit withstand capability (250°C, 5 seconds). For 8.7/15kV systems, typical sizes range from 25mm² to 630mm² (single core).
• Laying Conditions: Avoid installation at temperatures below 0°C (preheat cables if necessary). When directly buried, use sand padding and warning tape to prevent mechanical damage. In tunnels/ducts, maintain a clearance of ≥200mm between cables to facilitate heat dissipation.
• Termination and Connection: Use fire-resistant, halogen-free termination kits compatible with XLPE insulation. Ensure joints are sealed to prevent moisture ingress, which can degrade fire resistance and electrical performance.
• Testing and Commissioning: Perform partial discharge testing, insulation resistance testing, and withstand voltage testing after installation (IEC 60270, IEC 60502-2). Verify fire performance documentation (IEC 60331, IEC 61034) to ensure project compliance with relevant standards.
• Global standard conformity: International projects should comply with IEC 60502-2, IEC 60331, IEC 61034, and IEC 60754 standards. Regional projects may refer to NEC 70 (USA), BS 7671 (UK), and GB 31247 (China).