180°C Polyester-imide Enameled Wire: The High-Temperature Core Power for Dry-Type Transformers

In the stable operation of dry-type transformers, the high-temperature resistance and insulation properties of the magnet wire directly determine equipment lifespan and power transmission safety. The 180°C Polyester-imide Enameled Wire launched by Flait Aluminum, with its precise specifications and compatible performance, becomes the core choice for dry-type transformer windings, safeguarding power systems.

I. Precise Specification Parameters for Dry-Type Transformers

This enameled wire comprehensively meets the requirements of dry-type transformers in terms of material and dimensions, with specific specifications as follows:

• Conductor Material: Includes aluminum conductor and copper conductor, allowing flexible choice based on transformer cost budget and lightweight requirements.
• Dimensions: Round wire diameter 0.5mm-5.0mm, rectangular wire cross-section width 2.0mm-12.0mm, thickness 1.0mm-5.0mm, suitable for winding designs of dry-type transformers with different power ratings.
• Standard & Thermal Class: Stable thermal class of 180°C, compliant with GB/T 6109.10 (Chinese National Standard) and IEC 60317-21 (International Standard), ensuring no performance degradation under high-temperature operating conditions.

II. Core Advantages Tailored to Dry-Type Transformer Needs

Addressing the three core demands of “high temperature, high-frequency winding, high-voltage insulation” in dry-type transformer operation, this enameled wire possesses three prominent advantages:

• Excellent High-Temperature Resistance: The 180°C thermal class can withstand the temperature rise during full-load operation of dry-type transformers (typically ≤100K), effectively delaying insulation layer aging and extending transformer service life by over 30%.
• High Insulation Reliability: Utilizes a multi-layer polyester-imide enamel coating process with film uniformity error ≤0.02mm, capable of withstanding breakdown voltages above 15kV, avoiding winding short-circuit risks.
• Superior Mechanical Flexibility: Treated through continuous wire drawing and annealing, conductor elongation ≥15%. The bending radius during winding can be as low as 3 times the conductor diameter, making it suitable for automated high-speed winding processes in dry-type transformers, increasing production efficiency by 20%.

III. Practical Application Value in Dry-Type Transformers

Whether for high-power dry-type transformers in industrial settings (such as factory power distribution, wind power transformation) or building distribution transformers in civilian applications, this enameled wire plays a key role:

• Reduced Losses: Copper conductor resistivity ≤0.017241 Ω·mm²/m, aluminum conductor resistivity ≤0.028264 Ω·mm²/m, reducing copper/aluminum losses during transformer operation, meeting energy efficiency requirements.
• Resistance to Environmental Interference: The enamel film is resistant to chemical corrosion, transformer oil, and insulating varnish solvents, adapting to the long-term enclosed operating environment of dry-type transformers, reducing the failure rate to below 0.1%.
• Easy Installation: Surface smoothness reaches Ra 0.8μm, with a low friction coefficient during winding, ensuring tight winding arrangement and reducing core losses.

IV. Supporting Services for Dry-Type Transformer Manufacturers

Flait Aluminum provides comprehensive support for dry-type transformer customers:

• Customized Production: Can produce non-standard sized round or rectangular enameled wires based on customer transformer design drawings.
• Technical & After-Sales Support: A professional team is available to provide winding design advice. The product warranty period is up to 2 years, with a 48-hour response time for quality issues.
• Cost Advantage: Large-scale production reduces unit cost, offering prices 15%-20% lower than comparable imported specifications, helping customers control procurement costs.

Original Source:Magnet Wires for Power Industry