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Self-adhesive Transposed Conductor(3).jpg
Self-adhesive Transposed Conductor(2).jpg
Self-adhesive Transposed Conductor(1).jpg

Continuously Transposed Conductor CTC- Self-adhesive

It is mainly made of copper core, with a thermosetting self-adhesive coating added to the enameled layer, and is manufactured by transposition stranding and paper insulation wrapping. After the winding is wound and dried at high temperature, the self-adhesive layers are bonded and shaped with each other, and the conductor bundle forms an integral rigid structure, which greatly improves the short-circuit impact resistance and mechanical stability, without additional binding and the coil structure is more compact.

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    MATERIAL & STRUCTURE

    •Conductor: Oxygen-free copper (Cu ≥ 99.99%)

    •Base insulation: Polyvinyl acetal / Polyester-imide enamel

    •Top layer: Self-bonding resin coating (thermosetting or heat-activated)

    •Transposition: Continuous regular transposition, factory preformed

    •No paper insulation (self-bonding type, for dry-type / non-oil applications)

    Self-adhesive Transposed Conductor

    DIMENSIONAL DATA

    1. Single Strand
    • Thickness (a): 0.80 – 3.00 mm
    • Width (b): 2.50 – 12.00 mm
    • Aspect ratio: 2b/a ≤ 5
    • Tolerance: ±0.03 mm

    2. Number of Strands
    • Range: 4 to 60 strands (single / double row)

    3. Enamel + Self-bonding Coating Thickness
    • Total insulation thickness: 0.10 – 0.25 mm (per side)
    • Self-bonding layer: 0.03 – 0.08 mm

    Electrical & Mechanical Data 

    Item Specification
    DC Resistivity (20°C) ≤ 0.017241 Ω·mm²/m
    Breakdown Voltage (strand) ≥ 2500 V
    Thermal Class Class F (155°C) / Class H (180°C)
    Bonding Activation Temperature 120 – 160 °C (30–60 min)
    Bonding Shear Strength ≥ 3.0 MPa
    Elongation ≥ 30%
    Yield Strength 100 – 240 N/mm²
    Continuous Length (no joint) ≥ 3000 m
    Heat Shock Resistance Pass 2h × 155°C / 180°C, no cracking
    Transposition Stability No displacement, no damage to insulation

    Key Performance Advantages

    Item Performance
    Self-bonding Integrity Forms rigid integral winding after heating, no dipping needed
    Eddy & Circulating Loss Reduction 40% – 60% vs conventional parallel wires
    Slot Fill Factor 0.78 – 0.88
    Winding Volume Reduction 10% – 25%
    Short-circuit Withstand Improved by 25% – 40%
    Heat Dissipation Excellent for dry-type transformers
    Vibration & Noise Reduction High rigidity → low noise in operation

    QUALITY & COMPLIANCE

    • RoHS & REACH compliant

    • Complete factory test report

    • Batch COC available

    • Third-party inspection: SGS, BV accepted

    factory

    Product Structure Diagram

    示意图

    • （B） → Single Enameled Flat Wire Width 

    • （b） → Single Bare Copper Wire Width 

    • （Ｃ） → Center Liner Paper Width

    • （a） → Single Bare Copper Flat Wire Thickness 

    • （A） → Single Enameled Flat Wire Thickness 

    • （H） → Overall Height of Transposed Conductor 

    • （W） → Overall Width of Transposed Conductor 

    Cross-section of Transposed Conductor

    Application

    Large power transformers, special grid-connected transformers such as wind power/photovoltaic, and oil-immersed transformers of high voltage class, suitable for working conditions with high requirements for winding mechanical strength and short-circuit resistance such as the main power grid and new energy power generation supporting facilities.

    Typical Application Data

    Application Typical Conductor Performance
    Dry-type Distribution Transformer 6 strands × 1.8 × 6.0 mm Bonding strength ≥ 3.0 MPa, noise ↓ 5–8 dB
    Traction Transformer 8 strands × 2.0 × 7.0 mm Short-circuit performance ↑ 30%
    High-speed Rail Motor 5 strands × 1.5 × 5.0 mm High thermal class H (180°C)
    Compact Reactor 10 strands × 2.0 × 6.5 mm Winding volume ↓ 20%

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