Rated Voltage 0.6/1kV Cross‑linked Polyethylene Insulated Halogen‑free Low‑smoke Flame‑retardant (or Fire‑resistant) Power Cable

Product Implementation Standards

Production primarily follows these national and industry standards:
- GB/T 12706.1-2020: Requirements for basic structure, dimensions, electrical, and mechanical properties of power cables.
- GB/T 19666-2019: General rules for flame retardant and fire resistant characteristics.
- GB/T 3956: Requirements for conductor DC resistance.
- GB/T 18380 (IEC 60332): Classification tests for flame retardant performance.
- GB/T 17650 (IEC 60754): Halogen-free performance (halogen acid gas evolution).
- GB/T 17651 (IEC 61034): Low-smoke performance (smoke density/light transmittance).

Meaning of Model Codes

Models are composed of the following code combinations:
- Characteristics: WDZ / WDZA / WDZB / WDZC / WDZN — LSZH Flame-retardant (Grades A/B/C) / LSZH Flame-retardant Fire-resistant.
- Conductor: T (omitted) / L — Copper / Aluminum.
- Insulation: YJ — Cross-linked polyethylene (XLPE).
- Sheath: Y — Polyolefin sheath (LSZH material).
- Armoring (Optional): 23 / 33 / 63 / 73 — Double steel tape / Fine steel wire / Double non-magnetic metal tape / Non-magnetic metal wire.

Product Cross-section and Specification Range

Utilizing Class 1 (solid) or Class 2 (stranded) copper conductors:
- 1-Core: 1.5 to 1000 mm²
- 2-Core: 1.5 to 400 mm²
- 3-Core: 1.5 to 400 mm² (including 3+1 or 3+2 configurations)
- 4-Core: 1.5 to 400 mm² (including 4+1 configurations)
- 5-Core: 1.5 to 400 mm²

Main Performance Parameters

1. Electrical: Rated voltage 0.6/1 kV, maximum system voltage 1.2 kV, AC voltage test 3.5 kV / 5 min without breakdown.
2. Temperature: Max long-term working temperature +90°C, short-circuit temperature (max 5s) +250°C.
3. Mechanical: Minimum bending radius is 20D for unarmored single-core and 15D for multi-core cables.
4. Fire Performance: Meets halogen-free (low acidity/conductivity) and low-smoke (high light transmittance) requirements. Fire resistance (WDZN) supports Grade A (950-1000°C) or Grade B (750-800°C) for 90 minutes.

Usage Conditions

Suitable for AC 50Hz, 1kV and below power lines. It supports various installation methods including pipe, trench, tunnel, overhead, or direct burial. Armored models are recommended for environments with high mechanical loads.

Application Scenarios

- High-rise buildings and malls: WDZA/WDZB-YJY or WDZN-YJY.
- Hospitals and schools: WDZB/WDZC-YJY.
- Subways and tunnels: WDZA-YJY or WDZN-YJY23.
- Fire and emergency systems: WDZN-YJY.

Inspection and Acceptance Rules

Cables undergo routine tests (R) for every manufactured length, sample tests (S) for structural and mechanical checks, and comprehensive type tests (T) to ensure all specified requirements are met before supply.

Environmental Protection and Safety Characteristics

- Halogen-Free: Releases no toxic corrosive gases like hydrogen chloride.
- Low-Smoke: High light transmittance facilitates emergency escape and rescue.
- Low-Toxicity: Complies with the low toxicity requirements of GB/T 19666.
- Flame-Retardant: Effectively inhibits the spread of fire and self-extinguishes once the fire source is removed.