DC 1500V Cross‑linked Polyethylene Insulated Halogen‑free Low‑smoke Flame‑retardant (or Fire‑resistant) Power Cable

Implementation Standards

Product Models and Specifications

Representative models and component meanings:
- WDZA-TZYJY: Copper core XLPE insulated LSZH polyolefin sheathed Grade A flame-retardant DC 1500V power cable (non-armored).
- FS/FZ-WDZA-TZYJY: Copper core XLPE insulated waterproof/UV-resistant LSZH Grade A flame-retardant DC rail transit power cable.
- GD-YJY33: Urban rail transit copper core XLPE insulated copper tape armored polyolefin sheathed DC traction power cable (armored).
- WDZN-YJY: LSZH fire-resistant XLPE insulated polyolefin sheathed power cable.

Main Specifications:
- Rated Voltage: DC 1500V (max working voltage DC 1800V).
- Core Count: Single-core.
- Cross-section Range: 50 to 500 mm².

Product Structure

From inside to outside (using waterproof/UV-resistant armored type as example):

1. Conductor: Copper core compact stranded structure; low resistivity, excellent conductivity, reliable mechanical performance.
2. Conductor Shield (some designs): Semiconductor shielding for uniform electric field, preventing partial discharge.
3. Insulation: XLPE (chemical or irradiation cross-linking), excellent electrical insulation and heat resistance.
4. Insulation Shield (some designs): Closely bonded with insulation for uniform electric field distribution.
5. Waterproof Layer (optional): Composite waterproof structure — water-blocking tape + longitudinal aluminum/plastic composite tape + extruded PE inner sheath; excellent radial waterproofing and longitudinal water blocking.
6. Armoring (optional): High flame-retardant tape, copper tape, or steel tape; enhanced mechanical protection and rodent/ant resistance.
7. Outer Sheath: Weather-resistant LSZH polyolefin with UV resistance, flame retardancy, non-toxicity, low smoke, waterproofing, corrosion resistance, and termite resistance.

Core Performance and Technical Parameters

Electrical Performance:

Conductor DC Resistance (20°C, selected values):

Flame-retardant Performance:
- Grade A, B, or C bundled flame retardancy (customizable; Grade A highest).
- Char length <= 2.5m (bundled burning test per GB/T 18380 series).

Halogen-free Low-smoke Performance:

Fire-resistant Performance (fire-resistant type only):
- Grade A: 950°C to 1000°C for 90 min; circuit integrity maintained during rated voltage.
- Grade B: 750°C to 800°C for 90 min; circuit integrity maintained.

Waterproof / UV-resistant / Rodent and Termite Resistant:
- Waterproof: No water trace outside insulation after radial water resistance test (72h, 15°C to 30°C).
- UV-resistant: Passes weathering test (xenon lamp, 1008h).
- Rodent/Termite Resistant: Armoring and special sheath effectively resist rodents and ants.

Usage Conditions and Installation Requirements

Application Scenarios

- Urban rail transit systems (metro, light rail DC traction power supply).
- High-safety DC power distribution areas (tunnels, underground utility corridors).
- Critical power circuits in densely populated areas (ventilation/lighting, emergency systems).
- Industrial facilities with high environmental and fire protection requirements (power plants, chemical plants).

Product Advantage Summary

1. High-grade fire safety: Grade A flame retardancy; Grade A fire resistance (950°C / 90min); effectively delays flame spread and ensures power continuity during fire.
2. Eco-friendly and non-toxic: Sheath transmittance >= 60%; HCI release <= 5mg/g; no halogen; non-toxic and non-corrosive combustion gas; pH >= 4.3.
3. Outstanding weather and environmental adaptability: Waterproof, UV-resistant, rodent and ant resistant, corrosion-resistant; suitable for tunnels, elevated, and underground harsh environments.
4. Superior electrical and mechanical performance: Copper conductor with low resistivity; XLPE insulation with stable electrical and mechanical properties; long service life; low post-installation maintenance.
5. Strict standardized production: Designed per GB/T 28429-2012; tested and certified by national cable quality inspection centers.