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High-Temperature Resistant Nomex Paper Insulated Wire - China Suppliers and Factory for Quality Winding Solutions
Technical Parameter
NOMEX Material Standard: NOMEX covered wire technical standards — the NOMEX used by our company is made by DuPont USA T410 NOMEX. The thickness is 2 mils.
| Product | Wrapping Process | Number of Wraps | Insulation Thickness (mm) | Breakdown Voltage ≥ |
|---|---|---|---|---|
| Nomex | 1.5–2mm self locking Lapping | 1 | 0.12 ± 0.05 | 600V |
| 1.5–2mm self locking Lapping | 2 | 0.24 ± 0.05 | 1500V | |
| 50% lapping | 1 | 0.22 ± 0.05 | 1200V | |
| 50% lapping | 2 | 0.4 ± 0.05 | 1300V | |
| 1.5mm Reverse lapping | 3 | 0.33 ± 0.05 | 2500V |
Product Information
- NOMEX's electrical, chemical and mechanical properties are extremely high. Its elasticity, flexibility, anti-tearing, moisture resistance and wear resistance are very good. It has acid and alkali corrosion resistance, and is not easily destroyed by insects, molds or fungi.
- NOMEX is compatible with all kinds of varnish, adhesive, transformer liquid, lubricant and coolant. It has strong thermal resistance — even when the temperature reaches 220℃, the insulation property remains the same.
- Transformers using Nomex wrapped wire can bring clients significant economic, environmental and security benefits.
- Lower cost, smaller size, lighter weight: The operating temperature of transformers with Nomex insulation can rise up to 180℃. Fewer wires and ferrite cores are needed, resulting in smaller size, lighter weight, and reduced capital construction expenses. Smaller ferrite cores also mean smaller no-load loss.
Product Description
- Reliability Improvement: With Nomex wrapped wire, both the electrical specification and mechanical property remain outstanding throughout the transformer's entire service life. Nomex wrapping magnet wire is resistant to aging and maintains strong contraction and elasticity, ensuring transformer windings stay tight without cracking. Nomex insulation paper is not sensitive to temperature or dust, which greatly improves transformer reliability.
- Increased Reserve Capacity: Nomex's high thermal resistance ensures the insulation property is maintained even at 220℃. Rank C (220℃) replaces Rank H (180℃) in transformer design, allowing it to handle unexpected urgent loads and expansions while greatly reducing backup plan requirements.
- Good Environmental Performance: NOMEX is chemically stable, safely flame retardant, and anti-radiation. Even in a fire, it will not release toxic gases. It does not react with solvents and is resistant to acid and alkali corrosion. At the end of its service life, it is conveniently recyclable, the waste can be degraded, and it will not cause environmental pollution. Nomex is a truly environmentally friendly high-tech product.
Frequently Asked Questions
Q
What material is used for NOMEX covered wire and what are its thickness specifications?
Our NOMEX covered wire uses DuPont USA T410 NOMEX with a thickness of 2 mils. This high-quality material ensures excellent insulation performance and long-term reliability in transformer applications.
Q
What breakdown voltage levels can NOMEX wrapped wire achieve?
Depending on the wrapping process and number of wraps, NOMEX wrapped wire can achieve breakdown voltages ranging from 600V (1 layer, self-locking lapping) up to 2500V (3 layers, 1.5mm reverse lapping). Multiple wrapping configurations are available to meet different insulation requirements.
Q
What is the maximum operating temperature for transformers using NOMEX wrapped wire?
Transformers using NOMEX insulation can operate at temperatures up to 220℃ while maintaining the same insulation properties. This allows Rank C (220℃) to replace the traditional Rank H (180℃) design standard, providing significantly higher thermal reserve capacity.
Q
How does NOMEX wire help reduce the cost and size of transformers?
Because NOMEX supports higher operating temperatures (up to 180℃ for standard designs), transformers require fewer wires and smaller ferrite cores. This results in reduced size, lighter weight, lower capital construction costs, easier installation, and smaller no-load losses — all contributing to significant cost savings over the product lifecycle.
Q
Is NOMEX wrapped wire environmentally safe?
Yes. NOMEX is chemically stable, flame retardant, and anti-radiation. It does not release toxic gases even in fire conditions, is resistant to acid and alkali corrosion, and does not react with common solvents. At end-of-life, NOMEX insulation is conveniently recyclable and biodegradable, posing no environmental pollution risk.
Q
What makes NOMEX wrapped wire more reliable than conventional insulation materials?
NOMEX wrapped magnet wire is highly resistant to aging and maintains strong contraction and elasticity throughout the transformer's service life. It keeps windings tightly wound without cracking, is insensitive to temperature fluctuations and dust, and is compatible with a wide range of varnishes, adhesives, transformer liquids, lubricants, and coolants — ensuring consistent performance and long-term reliability.