Cvv/ Cvv-S/ Cvv-Swa 12 Core 18 22 24 20 AWG Shield Amoured Control Cable

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2025-09-11 07:39:34

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Comprehensive Guide to CVV/ CVV-S/ CVV-SWA 12 Core Shielded Armored Control cables

1. Product Specifications and Core Attributes

The CVV, CVV-S, and CVV-SWA 12 Core Control Cables form a family of high-reliability Electrical Cables engineered for precision signal transmission in industrial control systems. Designed to meet the stringent demands of automation, manufacturing, and infrastructure projects, these cables combine multi-conductor versatility, advanced shielding, and optional armoring to ensure uninterrupted performance in harsh environments. Available in 18, 20, 22, and 24 AWG, they cater to diverse signal and low-power transmission needs, from sensor data to motor control commands.

Electrical and Mechanical Specifications

Conductor Configuration: 12 individually insulated Copper Conductors, with gauge sizes (AWG) and cross-sectional areas as follows:

18 AWG: 0.823mm²

20 AWG: 0.518mm²

22 AWG: 0.324mm²

24 AWG: 0.205mm²

Current-Carrying Capacity:

18 AWG: 10A (free air) / 7A (conduit)

20 AWG: 7A (free air) / 5A (conduit)

22 AWG: 5A (free air) / 3A (conduit)

24 AWG: 3A (free air) / 2A (conduit)

Note: Ratings based on 30°C ambient temperature; derate by 10% for every 5°C increase above 30°C.

Voltage Rating: 300V to 600V, compliant with IEC 60227 and UL 2556 for low-voltage control circuits.

Temperature Range:

Standard PVC: -20°C to 70°C (continuous operation)

High-temperature PVC: -40°C to 90°C (for extreme environments)

Shielding (CVV-S and CVV-SWA):

Tinned copper braid: 85–95% coverage, 0.1mm–0.2mm wire diameter

Optional foil + drain wire: 100% coverage, aluminum-polyester foil with 24 AWG tinned copper drain wire

Armoring (CVV-SWA):

Galvanized steel wire braid: 0.3mm–0.5mm wire diameter, 70–80% coverage

Tensile strength: ≥15kN/m

Impact resistance: Withstands 50J impact (per IEC 60811-1-2)

Mechanical Flexibility:

Minimum bend radius: 6× cable diameter (static) / 10× (dynamic)

Weight: 0.3kg/m (24 AWG CVV) to 1.2kg/m (18 AWG CVV-SWA)

Electrical Performance:

Conductor resistance: ≤21.2Ω/km (18 AWG) to ≤84.5Ω/km (24 AWG) at 20°C

Insulation resistance: ≥100MΩ at 500V DC

Dielectric strength: 3kV AC for 1 minute (no breakdown)

2. Material Composition and Design

The performance of CVV/ CVV-S/ CVV-Swa Cables stems from their layered construction, with each material selected to optimize conductivity, protection, and signal integrity:

Conductors: High-Purity Stranded Copper

Each of the 12 Cores features high-purity electrolytic copper (99.9% purity) with fine stranding:

Strand Count: 19 strands (24 AWG) to 41 strands (18 AWG), each 0.1mm–0.2mm in diameter. This design enhances flexibility, allowing the cable to bend around machinery and tight corners without conductor fatigue.

Tin Plating: Optional tin coating (5–10μm thick) on strands prevents oxidation, critical for humid environments (e.g., food processing plants, marine settings) where corrosion could degrade conductivity.

Conductivity: ≥97% IACS ensures minimal signal loss, even over long runs (up to 100m) in industrial facilities.

Insulation: PVC Compounds

Individual conductors are insulated with PVC (polyvinyl chloride) formulated for electrical and mechanical performance:

Standard PVC: Offers good resistance to moisture, oils, and abrasion. Suitable for general industrial environments with temperatures up to 70°C.

High-Temperature PVC: Contains heat stabilizers (e.g., calcium-zinc compounds) to withstand up to 90°C, ideal for proximity to motors or furnaces.

Insulation Thickness: 0.2mm (24 AWG) to 0.4mm (18 AWG), ensuring dielectric strength while maintaining flexibility.

Shielding (CVV-S and CVV-SWA)

Shielding is a critical feature for noise-sensitive applications:

Copper Braid: Tinned Copper Wires (0.1mm–0.2mm) braided around the Insulated Cores. The 85–95% coverage balances EMI/RFI attenuation (≥40dB at 1GHz) with flexibility, making it suitable for dynamic installations (e.g., robotic arms).

Foil + Drain Wire: Aluminum-polyester foil wrapped around the cores, with a 24 AWG tinned copper drain wire for grounding. Provides 100% coverage and superior attenuation (≥60dB at 1GHz) for precision systems like CNC machines.

Armoring (CVV-SWA)

A galvanized steel wire braid adds mechanical protection:

Steel Wire Properties: High-tensile galvanized steel (0.3mm–0.5mm diameter) resists corrosion and impact. The braided design maintains flexibility while withstanding crushing forces (≥5kN) from heavy equipment.

Bonding: The armor is bonded to the outer sheath to prevent movement, reducing abrasion and ensuring consistent grounding.

Outer Sheath: PVC

The outer sheath encases the cores (and shielding/armor in advanced variants):

Formulation: UV-stabilized PVC with flame retardants (e.g., antimony trioxide) to meet UL 94 V-0 standards. Resists oils, chemicals, and UV radiation for outdoor or industrial use.

Color: Typically black or gray for easy identification; custom colors (e.g., blue for safety zones) available for bulk orders.

Thickness: 0.6mm–1.0mm, providing additional abrasion resistance.

3. Specialized Applications

These control cables are tailored to industries where reliable signal transmission is critical for operational safety and efficiency:

Industrial Automation

Automotive Manufacturing: CVV-S cables connect PLCs to robotic welders, paint booth sensors, and conveyor controls. The 12-core design consolidates signals for multiple axes, reducing cable clutter on assembly lines. 20–22 AWG variants are preferred for sensor data (e.g., position encoders), while 18 AWG handles motor control signals.

Packaging Machinery: CVV cables transmit speed and pressure signals in filling machines and labelers. Their flexibility allows routing through moving parts without signal degradation.

Food and Beverage Processing: Tin-plated CVV-SWA cables resist washdowns with caustic cleaners, making them ideal for grounding and signal transmission in dairy or meat processing lines.

Infrastructure and Utilities

Water Treatment Plants: CVV-SWA cables with steel armor protect against rodent damage in underground trenches, connecting pump controls to SCADA systems. 18 AWG cores handle valve actuation signals, while 24 AWG transmits pH sensor data.

Power Substations: Shielded CVV-S cables prevent EMI from transformers from disrupting relay controls and metering systems. Their flame retardancy adds safety in high-voltage zones.

Railway Systems: CVV-SWA cables withstand vibration in train control rooms, linking signaling equipment (e.g., track circuits) to central dispatch systems. The steel armor resists damage from maintenance vehicles.

Building Automation

Commercial Buildings: CVV cables integrate HVAC controls, lighting dimmers, and security systems. 22–24 AWG cores transmit temperature and motion sensor data, while 18 AWG powers small actuators.

Data Centers: Shielded CVV-S cables prevent EMI from server racks from interfering with cooling system controls, ensuring stable airflow and temperature regulation.

Marine and Offshore

Shipyards: CVV-SWA cables with tinned conductors resist saltwater corrosion, connecting navigation systems to engine controls. The armor protects against mechanical stress from hull vibrations.

Offshore Platforms: UV-stabilized sheaths and steel armor make CVV-SWA suitable for outdoor signal transmission (e.g., between drilling equipment and control rooms), withstanding harsh weather and chemical exposure.

4. Manufacturing Process

Production of CVV/ CVV-S/ CVV-SWA cables involves precision techniques to ensure consistency and compliance with standards:

Conductor Preparation

Copper Drawing: Raw copper rods (99.99% pure) are drawn through diamond dies to form 0.1mm–0.2mm wires, then annealed at 400°C to soften the metal for flexibility.

Stranding: Wires are twisted into conductors using high-speed stranding machines, with lay lengths (twist spacing) of 10–15× the wire diameter to balance flexibility and conductivity.

Tin Plating (Optional): Conductors are electroplated in a tin sulfate bath, ensuring uniform coverage to prevent oxidation.

Insulation Extrusion

PVC Compounding: PVC resin is mixed with plasticizers, stabilizers, and flame retardants in a twin-screw extruder to form a molten compound.

Extrusion: Conductors are fed through a crosshead extruder, where molten PVC is applied at 160–180°C to form insulation layers. Precision dies ensure uniform thickness (±0.02mm).

Cooling: Insulated Conductors are cooled in a water bath to solidify the PVC, then dried to remove moisture.

Cabling and Shielding (CVV-S and CVV-SWA)

Core Assembly: 12 insulated conductors are twisted into a bundle with filler (polypropylene rope) to maintain a round profile. The twist direction alternates to reduce crosstalk between cores.

Shielding Application:

Copper Braid: A braiding machine wraps tinned copper wires around the bundle at a 45° angle, ensuring 85–95% coverage.

Foil + Drain Wire: Aluminum-polyester foil is helically wrapped around the bundle, with a drain wire laid parallel for grounding.

Armoring (CVV-SWA)

Steel Braid Application: Galvanized steel wires are braided over the shielded bundle using a heavy-duty braiding machine, with 70–80% coverage to balance protection and flexibility.

Bonding: The steel braid is bonded to the underlying sheath via heat treatment to prevent movement during bending.

Outer Sheath Extrusion

Sheath Extrusion: The bundled cores (with shielding/armor) are fed through a final extruder, where UV-stabilized PVC is applied at 170–190°C to form the outer sheath.

Printing: Permanent markings (gauge, type, standards) are printed on the sheath using inkjet technology, ensuring legibility for decades.

Curing and Testing: Cables are cured at 60°C for 24 hours to stabilize the PVC, then tested for electrical and mechanical performance.

5. Quality Testing and Compliance

All cables undergo rigorous testing to meet international standards:

Electrical Tests:

Dielectric strength: 3kV AC applied between conductors and shield/armor for 1 minute.

Insulation resistance: Measured at 500V DC using a megohmmeter (≥100MΩ).

Conductor resistance: Verified using a four-point probe to ensure compliance with IEC 60228.

Mechanical Tests:

Flex testing: 10,000 cycles at 90° bends to simulate dynamic installation.

Abrasion resistance: A weighted sandpaper drum rubs the sheath until breakthrough (≥10,000 cycles).

Impact testing: A 5kg weight dropped from 1m onto the cable to check for insulation/armor damage.

Environmental Tests:

Temperature cycling: -40°C to 90°C (50 cycles) to test material stability.

Chemical Resistance: Immersion in oil, water, and dilute acids for 168 hours (no visible damage).

Certifications:

IEC 60227: Compliance for PVC-Insulated Cables.

UL 2556: Certification for control and instrumentation cables.

CE Marking: Conforms to EU low-voltage and EMC directives.

RoHS: Free of lead, mercury, and other hazardous substances.

6. 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 (CVV/ CVV-S/ CVV-SWA)

Gauge (AWG)

Length (50m, 100m, 500m)

Batch number and manufacturing date

Compliance marks (UL, CE, etc.)

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

Documentation: Each reel includes a certificate of conformity (CoC) with test results, installation guidelines, and material safety data sheets (MSDS).

Transportation and Handling

Shipping Modes:

Road: Trucks with reel lifts for domestic deliveries.

Sea: Container shipping (FCL/LCL) for international orders, with reels secured to prevent movement.

Air: For urgent orders (≤500m), shipped as air freight.

Handling Guidelines:

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

Cables should be stored horizontally in a dry, ventilated area (10°C–30°C) to avoid moisture absorption.

Unused cable must be rewound tightly to prevent kinking, which can damage conductors or shielding.

Storage Conditions:

Shelf life: 5 years from manufacture when stored in original packaging.

Avoid exposure to direct sunlight, ozone, or chemicals (e.g., solvents, acids).

Sample Provision

Sample Availability: Free 1m samples are available for standard variants (CVV, CVV-S, CVV-SWA) in all gauges, shipped within 2–3 business days.

Custom Samples: Specialized variants (e.g., high-temperature PVC, foil shielding) incur a fee and require 5–7 days for production.

Sample Testing: Samples include a test report with electrical and mechanical data to validate performance for specific applications.

Ordering and Delivery

Minimum Order Quantity (MOQ): 50m for standard variants; 100m for custom options.

Lead Times:

Standard orders: 3–5 business days.

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

Custom configurations: 10–15 business days.

Pricing: Varies by gauge, shielding, and armor:

CVV (unshielded): \(0.50–\)2.00/m (24–18 AWG)

CVV-S (shielded): \(0.80–\)3.00/m

CVV-SWA (shielded + armored): \(1.50–\)5.00/m

Volume discounts apply for orders over 1,000m.

Payment Terms: T/T, L/C, or credit card for international orders; net-30 for established clients.

After-Sales Support

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

Technical Assistance: A team of engineers provides:

Installation guidance (e.g., proper grounding of shields/armor).

Signal integrity testing for critical applications.

Customization advice (e.g., selecting shielding for high-EMI environments).

Returns and Replacements: Defective cables can be returned within 30 days for a full refund or replacement, pending verification with photos and the CoC.