Rated Voltage 0.6/1 kV and Below XLPE Insulated Polyolefin Sheathed Low-Smoke Zero-Halogen Flame Retardant (Fire-Resistant) Control Cable

Executive Standards
Production and inspection of the product strictly comply with relevant technical specifications and enterprise-specific standards:
- Q/320481SS008-2023: Core product execution standard.
- GB/T 19666: General rules for flame retardant and fire-resistant wires and cables.
- GB/T 17651 (IEC 61034): Measurement of smoke density.
- GB/T 17650 (IEC 60754): Test for halogen-free and corrosive gases.

Model Code Definitions
Model codes use specific designations to reflect the cable's construction and performance characteristics:
- WDZ: Halogen-free, low-smoke, flame retardant property code.
- ZA/ZB/ZC: Flame retardant class code (Class A is the highest).
- N: Fire-resistant property code (maintains circuit integrity under flame exposure).
- K: Control cable series.
- YJ: Cross-linked polyethylene (XLPE) insulation.
- Y: Polyolefin sheath.
- P / P2 / P3: Shielding structure (e.g., P-copper wire braid, P2-copper tape wrap).
- 23 / 33: Armoring structure (23-double steel tape armor, 33-fine steel wire armor, with polyolefin sheath).

Product Specification Range
The conductor uses high-quality annealed copper wire, with specification designs accurately covering various precision signal and power control requirements:
- (2–61) cores × (0.5–2.5) mm²
- (2–37) cores × (4, 6) mm²
- (2–7) cores × 10 mm²

Core Technical Parameters
1. Rated voltage (U₀/U): 600/1000 V.
2. Temperature characteristics:
   - Maximum continuous permissible conductor operating temperature: 90°C.
   - Maximum conductor temperature during short circuit (max. 5 s): 250°C.
3. Environmental indicators (LSZH indicators):
   - Halogen-free performance: pH value of gas released during combustion ≥ 4.3; conductivity ≤ 10 μS/mm.
   - Low-smoke performance: Minimum light transmittance for smoke density ≥ 60%.
4. Bending radius:
   - Non-armored and flexible cables: not less than 6 times the cable outer diameter.
   - Armored or shielded cables: not less than 12 times the cable outer diameter.

Product Structural Characteristics
- High-performance insulation layer: XLPE insulation offers outstanding electrical insulation resistance and mechanical and physical properties, with current-carrying capacity superior to that of ordinary PVC insulated cables.
- Anti-interference shielding system: The P series types use a high-coverage metallic shielding structure to effectively resist external electromagnetic field interference and ensure accurate transmission of control signals.
- Fire-resistant safety barrier (for N type): High-performance mica tape is wrapped over the conductor, ensuring signal integrity is maintained for at least 90 minutes under high-temperature fire conditions (not lower than 750°C–800°C).
- Environmentally friendly sheath: The outer sheath is made of a specialized polyolefin material, which is halogen-free and produces thin, non-toxic, and non-corrosive smoke during combustion.

Applicable Scenarios
- Densely populated and high-safety locations: Secondary circuit systems in subways, tunnels, airports, hospitals, large shopping malls, and super high-rise buildings.
- Fire protection and emergency interlock systems: Critical circuits such as fire control centers, smoke exhaust fans, emergency lighting, and fire alarm systems.
- Precision industrial facilities: Control networks in data centers, non-containment areas of nuclear power plants, cleanrooms, and petrochemical parks.

Installation and Maintenance Recommendations
- Installation temperature control: The ambient temperature during installation should not be lower than 0°C. When working in low-temperature environments, preheat the cable to prevent damage to the sheath and internal fire-resistant layer.
- Grounding continuity: For cables with shielding structures, ensure good grounding of the shield at terminations and joints during installation to maintain the electromagnetic compatibility of the system.
- Matching accessory selection: Cable accessories and sealing materials that match the low-smoke zero-halogen characteristics should be selected to maintain the overall fire safety level of the power supply system.