Engineered to operate at high current densities with low eddy current losses, our paper-insulated rectangular conductors ensure maximum thermal efficiency in critical power systems.
Features premium Kraft paper insulation wrapped over EC-grade flat aluminum core, tailored for light-weight distribution transformers.
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Utilizes ultra-high purity oxygen-free copper (OFC) with multiple layers of Dennison crepe paper wrap, ideal for UK substation equipment.
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Optimized dimension tolerances with high dielectric strength wrapper. Highly stable performance under sudden short-circuit thermal stresses.
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Precision calibrated copper conductor wrapped in thermally upgraded insulation paper, designed to meet rigorous BS EN 60317 thermal classes.
View SpecificationAs the United Kingdom accelerates its path toward Net Zero by 2050, the demand for robust, high-efficiency electrical infrastructure has surged to historic highs. The transition from fossil-fuel baseline power generation to offshore wind, utility-scale solar farms, and widespread electric vehicle (EV) charging stations requires massive updates to the national grid. Central to this modernization are extra-high-voltage (EHV) and high-voltage (HV) power transformers.
Our flat winding wires, covered in high-quality insulating paper (such as Tele-paper, crepe paper, and Nomex®), represent the key technological link. They offer exceptional mechanical stability and thermal limits capable of withstanding the demanding cycles of renewable feed-ins. Under British Standards (BS) and EN directives, these wires minimize dielectric losses and prevent partial discharge, guaranteeing a service life of over 40 years under heavy load dynamics.
Understanding the dielectric limitations and mechanical characteristics of winding paper insulation is vital for transformer life-cycle engineering. Explore our typical materials index below:
| Insulation Type | Base Material Composition | Thermal Class | Dielectric Strength (kV/mm) | Primary Application Areas |
|---|---|---|---|---|
| Kraft Paper (Standard) | Unbleached Sulfate Cellulose | Class A (105°C) | ≥ 8.0 | Standard distribution transformers, oil-immersed medium voltage reactors. |
| Thermally Upgraded Paper | Nitrogen/Amine-modified Cellulose | Class E (120°C) | ≥ 10.0 | Heavy-duty substation step-down transformers, localized traction engines. |
| Dennison Crepe Paper | High-stretch textured Kraft Paper | Class A (105°C) | ≥ 7.0 | Lead wire connections, transition windings, and flexible junction insulation. |
| Nomex® Aramid Paper | Synthetic Meta-Aramid Polymer | Class H (180°C - 220°C) | ≥ 20.0 | Dry-type wind turbine nacelle transformers, electric high-speed trains, traction power. |
Offering a complete portfolio of high-precision conductor profiles, enameled films, and transposed structural designs to match various electrical engineering requirements.
Lightweight winding conductor designed with heat-resistant polyurethane or polyesterimide coatings, ideal for automotive electrical systems and domestic electronics.
High-conductivity OFC wire with uniform enamel paint layers. Perfect for high-efficiency industrial motors, magnetic solenoids, and high-frequency coils.
A cost-effective alternative combining the electrical properties of copper with the light weight of aluminum, suitable for communication equipment and high-frequency voice coils.
Continuously transposed conductors configured for large grid-scale transformers, drastically lowering load losses from parasitic eddy currents.
Suzhou Daiming Electrical Materials Co., Ltd., is a leading manufacturer of high-quality enameled wires: enameled aluminum wires, enameled copper wires, and enameled copper-clad aluminum wires. Situated on a sprawling 258,333.33 ft² site, our advanced production facility houses 30 state-of-the-art production lines.
This robust infrastructure enables us to maintain a stable and high-volume output, ensuring consistent supply to meet global market demands. With strict quality control at every stage, from raw material inspection to final product testing, we uphold the highest industry standards, guaranteeing the durability and performance of our enameled wires.
International procurement requires perfect synchronization of quality, output capacity, and logistics. At Daiming Electrical, our Factory 4.0 strategy leverages automated rectangular extrusion and precision wrapping heads. By utilizing laser control systems, we measure the width, thickness, and wrapping pitch of our paper covered wires in real time, correcting variances down to 0.01 mm.
For UK procurement departments managing complex projects, we offer customized logistics coordination. We operate near deep-water ports like Shanghai and Ningbo, offering optimized shipping directly to major UK ports (e.g., London Gateway, Felixstowe, Southampton). Every consignment is packed in moisture-barrier vacuum packaging inside reinforced wooden drums, protecting the paper insulation from saline atmospheric corrosion during transport.
Our commitment to material integrity and quality control ensures that our wires exceed international performance expectations.
Every single batch of enameled wire undergoes strict testing to verify uniform film thickness, ensuring superior dielectric strength and insulation safety.
The dense enamel film provides excellent adhesion, scratch resistance, and physical flexibility, ensuring performance under thermal stresses.
Get precise dimensional engineering. We match physical parameters, thermal classes, and insulation layers specifically to your design schematics.
A comprehensive supply chain and optimized production capacity assure on-time delivery even for complex, large-scale utility projects.
Specifically engineered for use in high-efficiency, energy-saving electric motors, HVDC networks, and clean renewable wind power systems.
Our structural conductors are integrated into systems that keep national networks running efficiently.
Stay updated on material technology trends, export operations, and raw copper/aluminum market shifts.
With the rapid development of new energy and high-end manufacturing in 2026, cost control and quality assurance have become critical criteria...
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Faced with operational challenges caused by raw material price fluctuations, copper-clad aluminum wire continues to serve as an excellent cost-mitigating solution...
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Our high-quality Continuously Transposed Conductors (CTC) have successfully shipped to Turkey, highlighting our support for Eurasian infrastructure projects...
Read More →Clear answers to help electrical designers and procurement managers make informed decisions.
In the United Kingdom, paper covered rectangular copper and aluminum wires must comply with the BS EN 60317 series (specifically part 27 for paper covered rectangular copper wire). Standard tests are conducted in accordance with BS EN 60851, which measures dimensional precision, elongation limits, spring-back angles, and electrical breakdown voltages. These tests confirm the conductors can withstand the mechanical stress of transformer assembly and decades of field use.
While enameled flat wires have thin insulation coatings that save space, paper covered flat wires are preferred for high-voltage, oil-immersed transformers. The cellulose fibers in insulation paper absorb dielectric transformer oil, creating a highly reliable composite liquid-solid insulation system. This system offers excellent cooling properties, high resistance to thermal aging, and handles voltage surges and short circuits better than synthetic enamel films.
To provide an accurate quote and ensure proper engineering, please specify: 1) Conductor material (Oxygen-free copper or EC-grade aluminum), 2) Conductor dimensions (width "a" and thickness "b"), 3) Insulation type (Kraft paper, Dennison Crepe, or Nomex®), 4) Number of paper layers or desired insulation thickness, and 5) Winding application environment (oil-immersed or dry-type).
Moisture control is essential for paper insulation. We dry our finished windings inside thermal ovens before wrapping them in protective plastic film. The reels are then packed with active silica gel desiccant inside a heavy-duty, heat-sealed aluminum foil vacuum bag. This bag is secured inside reinforced wooden crates, protecting the paper from moisture and humidity during transit to UK ports.
Select from our complete range of specialized copper and aluminum magnet wires to find the exact specifications for your high-voltage equipment.
Specifically engineered to minimize eddy current losses in major UK power grid step-up transformers.
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Ideal for winding high-frequency induction coils and traction motors requiring tight tolerances.
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Offers high thermal resistance for heavy-duty electric vehicle drivetrains and wind power generators.
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A cost-effective, lightweight wire choice for distribution transformer assemblies.
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Designed for high-temperature electrical systems. Features a premium film coating that prevents cracking under mechanical stress.
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Provides excellent solderability and chemical resistance, suitable for industrial relays and solenoid valves.
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High thermal stability magnet wire engineered for generator systems and heavy industrial machinery.
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Excellent chemical, solvent, and thermal overload resistance, ideal for severe industrial environments.
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