Vvg Vvgng Avvg Avvg-M 660V 1000V Power Cable GOST 31565 3X2.5mm2

1. Product Specifications and Core Attributes

Electrical and Mechanical Specifications

• Conductor Configuration: 3 insulated Copper Conductors, each with a cross-sectional area of 2.5mm², encased in material-specific sheaths (PVC or aluminum-PVC combinations). Overall cable diameter varies by type:

• VVG/VVGng: 10mm–12mm

• AVVG/AVVG-M: 11mm–13mm (due to aluminum sheath)

• Current-Carrying Capacity:

• 25A in free air (30°C ambient temperature)

• 20A in conduit (reduced heat dissipation)

• 16A in thermal insulation (e.g., wall cavities), ensuring safe operation in enclosed spaces.

• Voltage Rating: 660V–1000V, compatible with three-phase 380V industrial grids, 660V mining systems, and 1000V medium-voltage infrastructure.
• Temperature Range:

• Continuous operation: -5°C to 70°C (suitable for cold storage, heated industrial zones, and outdoor use).

• Short-term overload: Up to 105°C for 5 seconds (withstands transient spikes from motor startups).

• Mechanical Properties:

• Tensile strength: ≥200N/mm² (solid conductors) or ≥150N/mm² (Stranded Conductors).

• Minimum bend radius: 6× cable diameter (static) / 10× (dynamic) for VVG/VVGng; 8× (static) / 12× (dynamic) for AVVG/AVVG-M (due to aluminum sheath).

• Impact resistance: 50J (per GOST 31565), protecting against accidental damage during installation.

• Crush resistance: 15kN/m (VVG/VVGng) and 20kN/m (AVVG/AVVG-M), suitable for direct burial under light traffic.

• Electrical Performance:

• Conductor resistance: ≤7.41Ω/km (solid) or ≤7.68Ω/km (stranded) at 20°C, minimizing voltage drop over 100m runs.

• Insulation resistance: ≥100MΩ at 500V DC, ensuring reliable isolation between phases.

• Dielectric strength: ≥10kV AC for 1 minute (no breakdown), preventing arcing in humid or dusty conditions.

2. Material Composition and Design

Conductors: High-Purity Copper

• Solid Conductors (VVG, VVGng): A single, rigid copper rod (1.78mm diameter) for permanent installations (e.g., conduit runs in commercial buildings). Offers stable conductivity and easy termination in junction boxes.

• Stranded Conductors (AVVG, AVVG-M): 19 fine strands (0.4mm diameter each) twisted concentrically, enhancing Flexibility for dynamic applications (e.g., machinery wiring or temporary construction setups).

• Conductivity: ≥97% IACS, ensuring efficient power transmission with minimal energy loss.

• Corrosion Resistance: Optional tin plating (5–10μm thick) for humid environments (e.g., food processing plants, tunnels).

Insulation: PVC Compounds

• Base PVC (VVG, AVVG): Blended with plasticizers (dioctyl phthalate) for flexibility and heat stabilizers (calcium-zinc) to resist degradation. Suitable for dry to moderately humid environments.

• Flame-Retardant PVC (VVGng): Contains antimony trioxide and aluminum hydroxide to meet GOST 12.1.044 fire safety standards, self-extinguishing within 10 seconds of ignition. Ideal for public spaces (schools, hospitals).

• Phase 1: Brown

• Phase 2: Black

• Phase 3: Grey

Sheathing: Tailored Protection

• VVG: PVC outer sheath (1.2mm thick) for basic protection against moisture, abrasion, and dust. Cost-effective for indoor dry environments (e.g., office buildings, retail stores).

• VVGng: Non-flammable (ng) PVC Sheath (1.2mm thick) with enhanced flame retardants, resisting fire spread and low smoke emission. Critical for high-occupancy spaces.

• AVVG: PVC-Insulated Conductors wrapped in an aluminum sheath (0.2mm–0.3mm thick) and covered with an outer PVC layer (1.0mm thick). The aluminum provides mechanical strength and corrosion resistance, making it suitable for industrial zones with dust, oils, or light impact.

• AVVG-M: Modified aluminum sheath (0.15mm thick) with increased flexibility, paired with a pliable PVC outer layer. Designed for frequent bending (e.g., robotic arm wiring or portable power setups).

Additional Design Features

• UV Stabilization: AVVG and AVVG-M sheaths include carbon black additives to resist sunlight degradation, enabling outdoor use (e.g., railway infrastructure).

• Oil Resistance: AVVG/AVVG-M PVC formulations withstand mineral oils and coolants, ideal for factory floors.

• Printing: Permanent markings on sheaths include cable type, size (3X2.5mm²), voltage rating, GOST 31565 compliance, and batch numbers for traceability.

3. Specialized Applications

Industrial Facilities

• Manufacturing Plants: AVVG and AVVG-M power conveyors, pumps, and assembly lines. Their aluminum sheaths resist damage from machinery, while stranded conductors accommodate vibration.

• Food Processing: Tin-plated AVVG cables withstand washdowns with caustic cleaners, linking mixers and packaging machines to distribution panels.

• Automotive Factories: VVGng’s flame resistance protects against welding sparks, powering robotic welders and paint booth systems.

Commercial and Public Buildings

• Offices and Retail: VVG cables wire lighting, HVAC, and power outlets, balancing cost and performance. Their rigid conductors simplify installation in ceiling cavities.

• Schools and Hospitals: VVGng ensures fire safety in classrooms and patient rooms, connecting emergency lighting, medical equipment, and HVAC controls.

• High-Rises: AVVG’s aluminum sheath protects against rodent damage in wall cavities, distributing power to floor panels and elevator systems.

Infrastructure and Utilities

• Railways: AVVG-M’s flexibility aids wiring in train stations and tunnels, powering signaling systems and platform lighting. UV stabilization resists outdoor exposure.

• Water Treatment Plants: Tin-plated AVVG cables withstand moisture and chlorine, connecting pumps, filtration systems, and chemical dosing equipment.

• Construction Sites: AVVG-M serves as temporary power links for cranes and tools, with Flexible Conductors adapting to frequent repositioning.

Mining and Heavy Industry

• Underground Mines: 660V-rated AVVG cables power extraction equipment, with aluminum sheaths resisting dust and mechanical impact. Flame retardancy reduces fire risks in confined spaces.

• Steel Mills: VVGng withstands high ambient temperatures near furnaces, distributing power to rolling mills and cooling systems.

4. Manufacturing Process

Conductor Production

1. Copper Drawing: Raw copper rods (99.99% pure) are drawn through diamond dies to form solid rods (1.78mm) or fine strands (0.4mm).

2. Annealing: Strands are heated to 400°C to soften copper, enhancing flexibility for stranding.

3. Stranding (AVVG/AVVG-M): 19 strands are twisted in concentric layers using high-speed machines, with lay lengths of 15×–20× strand diameter to balance flexibility and conductivity.

Insulation Extrusion

1. PVC Compounding: Resins are mixed with additives (flame retardants for VVGng) in a twin-screw extruder to form molten compounds.

2. Extrusion: Conductors are fed through crosshead extruders, where PVC is applied at 160°C–180°C to form uniform insulation layers.

3. Cooling: Insulated conductors are cooled in water baths and dried to prevent moisture absorption.

Sheathing and Armor Application

1. Cabling: Three insulated conductors are twisted into a bundle with filler (polypropylene rope) to maintain roundness.

2. Sheath Extrusion (VVG/VVGng): Bundles are fed through extruders to apply outer PVC sheaths, which are cooled and printed with markings.

3. Aluminum Sheath (AVVG/AVVG-M): Bundles pass through a forming machine where Aluminum Tape is wrapped helically (AVVG) or longitudinally (AVVG-M) and sealed with adhesive.

4. Outer PVC Layer (AVVG/AVVG-M): A final PVC sheath is extruded over the aluminum, providing additional protection and UV resistance.

Quality Testing

• Electrical Tests: Dielectric strength, insulation resistance, and conductor resistance measurements.

• Mechanical Tests: Impact, crush, and bend testing to validate durability.

• Environmental Tests: Exposure to -5°C (cold) and 70°C (heat) for 1000 hours to check material stability.

5. General Product Information

Packaging

• Reels: Cables are wound onto wooden or steel reels (30cm–1m diameter) with flanges to prevent unwinding. Reels are labeled with:

• Cable type (VVG, VVGng, etc.)

• Configuration (3X2.5mm²)

• Length (50m, 100m, 500m)

• GOST 31565 compliance

• Batch number and production date.

• Protection: Reels are wrapped in moisture-resistant plastic and secured with steel straps. Smaller lengths (10m–30m) are coiled in cardboard boxes with foam inserts.

• Documentation: Each reel includes a certificate of conformity (CoC) with test results and installation guidelines.

Transportation and Handling

• Shipping Modes:

• Road: Trucks with reel lifts for domestic deliveries in Russia and neighboring countries.

• Rail: Containerized rail transport for bulk orders across Eurasia.

• Sea: FCL/LCL container shipping for international markets (e.g., CIS countries, Eastern Europe).

• Handling Guidelines:

• Reels must be moved with forklifts or cranes using reel hooks—never dragged.

• Storage in dry, ventilated facilities (10°C–30°C) to avoid moisture damage.

• Unused cable must be rewound tightly to prevent kinking, which can degrade conductors or insulation.

Sample Provision

• Sample Availability: Free 1m samples of standard variants (VVG, VVGng) are available within 2–3 business days.

• Custom Samples: AVVG and AVVG-M samples incur a fee and require 5–7 days for production.

• Sample Testing: Each sample includes a test report with conductivity, insulation resistance, and flame retardancy data (for VVGng).

Ordering and Delivery

• Minimum Order Quantity (MOQ): 50m for standard variants; 100m for AVVG/AVVG-M.
• Lead Times:

• Standard orders: 3–5 business days.

• Bulk orders (≥10,000m): 7–10 business days.

• Pricing: Varies by type (prices in USD per meter):

• VVG: $1.20–$1.50

• VVGng: $1.40–$1.70 (premium for flame retardancy)

• AVVG: $1.80–$2.10

• AVVG-M: $2.00–$2.30 (modified aluminum sheath)
  Volume discounts apply for orders over 1,000m.

• Payment Terms: T/T (30% deposit, 70% upon delivery), L/C, or credit card for international orders.

After-Sales Support

• Warranty: 5-year warranty against manufacturing defects (e.g., insulation breakdown, conductor corrosion under normal use). Excludes damage from improper installation or chemical exposure beyond specifications.

• Technical Assistance: Engineers provide guidance on:

• Installation (e.g., proper bending techniques for AVVG-M).

• Derating factors for high-temperature environments.

• Compliance with local electrical codes (e.g., Russian PUE standards).

• Returns and Replacements: Defective cables can be returned within 30 days for refund or replacement, verified via photos and CoC.

• Maintenance Tips: Annual inspections for sheath damage; cleaning with a damp cloth (avoid solvents); avoiding prolonged exposure to temperatures above 70°C.