Rated Voltage 0.6/1kV PVC Insulated (Flame‑retardant, Fire‑resistant) Power Cable

Implementation Standards

The product is designed and manufactured according to the following standards:
- GB/T 12706.1-2020: Requirements for extruded insulated power cables up to 3kV.
- GB/T 19666-2019: General rules for flame-retardant and fire-resistant characteristics.
- GB/T 3956: Requirements for cable conductors (DC resistance).
- IEC 60502-1: International standard for power cables with extruded insulation.
- GB/T 18380 (IEC 60332): Tests on electric cables under fire conditions (Flame-retardancy).
- GB/T 19216 (IEC 60331): Tests for electric cables under fire conditions (Circuit integrity).

Common Models and Naming

- General Type: VV (Copper core), VLV (Aluminum core).
- Flame-retardant Type: ZR-VV, ZA-VV, ZB-VV, ZC-VV (Grades A, B, and C).
- Fire-resistant Type: NH-VV, NH-VV22.
- Armored Type: VV22 (Steel tape armored), VV32 (Fine steel wire armored).

Technical Parameters

1. Electrical Parameters:
   - Rated Voltage (U0/U): 0.6/1kV.
   - Highest System Voltage (Um): 1.2kV.
   - AC Voltage Test: 3.5kV / 5min without breakdown.
   - Insulation Resistance (20°C): >= 36.7 MOhm·km.
2. Temperature Ratings:
   - Max long-term operating temperature: <= 70°C.
   - Short-circuit temperature (<= 5s): 160°C (for section <= 300mm²) / 140°C (for section > 300mm²).
3. Minimum Bending Radius (D = Outer Diameter):
   - Single-core: 20D (Unarmored) / 15D (Armored).
   - Multi-core: 15D (Unarmored) / 12D (Armored).

Cable Structure

1. Conductor: Annealed copper or aluminum (Class 1 solid or Class 2 stranded).
2. Insulation: High-quality PVC compound.
3. Fire-resistant Layer (NH only): Multiple layers of mica tape wrapped over the conductor to maintain circuit integrity during fire.
4. Filling and Bedding: Non-hygroscopic materials to ensure a round cable shape.
5. Armoring: Double galvanized steel tape (22) or galvanized steel wire (32) for mechanical protection.
6. Outer Sheath: PVC or PE material.

Usage and Application

- VV / VLV: For indoor, tunnel, and pipe installations where mechanical force is not expected.
- VV22 / VLV22: For direct burial in the ground, capable of withstanding mechanical pressure.
- ZR-VV / ZA-VV: For public places with flame-retardant requirements.
- NH-VV: For fire emergency systems and high-safety environments.

Product Advantages

1. Cost-Effective: PVC provides high performance at a lower cost.
2. Easy Installation: Simple structure and lightweight design.
3. Chemical Resistance: Excellent resistance to oils, acids, and alkalis.
4. Safety: Reliable flame-retardant and fire-resistant performance ensures safety in emergencies.