Rated Voltage 6~35kV Cross-linked Polyethylene Insulated (Flame-retardant, Anti-termite) Power Cable

Implementation Standards

Core standard: GB/T 12706 (equivalent to IEC 60502) for design and manufacture.
- GB/T 12706.2: For rated voltages 6kV to 30kV
- GB/T 12706.3: For rated voltage 35kV
- GB/T 19666: Flame-retardant grade standard
- GB/T 18380 (equivalent to IEC 60332): Flame-retardant test
- IEC 60754: Combustion gas corrosivity test
- JB/T 10696.9-2011: Anti-termite test methods

Product Structure

1. Conductor: High-purity oxygen-free copper (T) or aluminum (L); compact round stranded; single-core 25 to 2000 mm², three-core 25 to 400 mm²

2. Conductor shield: Semiconductive layer extruded on conductor surface (3.6/6kV and above)

3. Insulation: XLPE; chemical or irradiation cross-linking; high strength, low dielectric loss

4. Insulation shield: Semiconductive material; capacitive shielding with metal shield

5. Metal shield (optional): Copper tape or copper wire

6. Filling and cabling: Non-hygroscopic filling ropes

7. Armoring (model-dependent):
   - Code 22: Double steel tape — for direct burial
   - Code 32: Fine steel wire — for vertical installation
   - Code 42: Thick steel wire — for underwater/large tensile force
   - Code 23/33/43: With polyethylene outer sheath for improved waterproofing

8. Sheath and anti-termite design (three-layer protection):
   - Outer sheath chemical repellent: Eco-friendly repellent (e.g., capsaicin, camphor) in sheath material
   - Armoring physical barrier: Steel tape/wire blocks termite penetration
   - Inner sheath protection: Anti-termite components as final barrier

Technical Parameters

Rated voltage range:
- 3.6/6 kV, 6/6 kV, 6/10 kV, 8.7/10 kV, 8.7/15 kV, 12/20 kV, 18/30 kV, 21/35 kV, 26/35 kV

Electrical performance:
- Conductor DC resistance (20°C): per GB/T 3956
- Insulation resistance constant (90°C): >= 3.67 MOhm·km
- Partial discharge: <= 5pC at 1.73U0
- Max long-term conductor temperature: 90°C
- Short-circuit temperature (<=5s): 250°C
- Overload temperature: 130°C

Bending radius: Single-core unarmored 20D; armored 15D; three-core unarmored 15D; armored 12~13D.

Flame-retardant and Anti-termite Models

Anti-termite test per JB/T 10696.9-2011: test temperature 27±2°C, duration over 3 months; Grade I protection achieved.

Application Areas

- Direct burial in termite-prone areas (recommended armored type)
- Fire alarm, firefighting, and emergency evacuation distribution systems
- Electric power, construction, mining, metallurgy, petroleum, and chemical sectors
- Underground facilities, tunnels, high-rise buildings, nuclear power plants (LSZH type)

Service life: >= 30 years under normal installation conditions.