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High-Temperature Resistant Nomex Paper Insulated Wire from China Suppliers - Quality Factory Manufacturing
Technical Parameter
📋 NOMEX Covered Wire Technical Standards
NOMEX which our company use is made by DuPont USA T410 NOMEX. The thickness is 2mils.
| Product | Wrapping Process | The number of wraps | Insulation Thickness/mm | Breakdown Voltage ≥ |
| Nomex | 1.5-2mm self locking Lapping 1.5-2mm | 1 | 0.12±0.05 | 600V |
| 1.5-2mm self locking Lapping 1.5-2mm | 2 | 0.24±0.05 | 1500V | |
| 50% lapping 50% | 1 | 0.22±0.05 | 1200V | |
| 50% lapping 50% | 2 | 0.4±0.05 | 1300V | |
| 1.5mm Reverse lapping | 3 | 0.33±0.05 | 2500V |
Product Information
⚡ Advantages of NOMEX Wrapped Wire
NOMEX's electrical, chemical and mechanical properties are extremely high, and its elasticity, flexibility, anti-tearing, moisture resistance and wear resistance are very good. Moreover, it has acid and alkali corrosion resistance. It is not easily destroyed by insects, molds and fungi. It has compatibility with all kinds of varnish, adhesive, transformer liquid, lubricant and coolant.
- Strong thermal resistance — even if the temperature reaches 220℃, the insulation property remains the same.
- Transformers with Nomex wrapped wire deliver significant economic, environmental and security benefits.
- Compatible with all kinds of varnish, adhesive, transformer liquid, lubricant and coolant.
- Not easily destroyed by insects, molds and fungi.
💡 Lower Cost, Smaller Size, Lighter Weight
The temperature of a transformer with Nomex insulation can rise up to 180℃ because the transformer needs fewer wires and ferrite cores, resulting in smaller size and lighter weight. This reduces capital construction expense and makes installation easier. A smaller ferrite core also means smaller no-load loss.
Product Description
🔧 Reliability Improvement
With Nomex wrapped wire, the electrical specification and mechanical property are outstanding throughout the transformer's entire service life. Nomex wrapping magnet wire is not easy to age and has strong contraction and elasticity, ensuring the transformer winding maintains close contact with no cracks. Nomex insulation paper is not sensitive to temperature or dust, thus improving the reliability of transformers.
📈 Increase of Reserve Capacity
Nomex's thermal resistance is high — even at 220℃, the insulation property remains the same. Rank C of 220℃ replaces Rank H of 180℃ during transformer design, allowing it to handle urgent load situations and unexpected expansion, greatly reducing the need for backup plans.
🌿 Good Environmental Performance
NOMEX is chemically stable, safety flame retardant, and anti-radiation. Even in the event of a fire, it will not release toxic gases. It does not react with solvents and is resistant to acid and alkali corrosion. After the end of its service life, it is conveniently recyclable, the waste can be degraded, and it will not cause environmental pollution. Nomex is an environmentally friendly high-tech product.
- Chemically stable and safety flame retardant.
- Does not release toxic gases even in fire conditions.
- Resistant to acid, alkali, and solvent reactions.
- Recyclable and biodegradable — no environmental pollution.
- Classified as an environmentally friendly high-tech product.
Frequently Asked Questions
What is NOMEX covered wire and who manufactures the NOMEX material used?
NOMEX covered wire is a type of magnet wire wrapped with NOMEX insulation paper for enhanced electrical and thermal protection. The NOMEX material used is made by DuPont USA, specifically the T410 NOMEX grade with a thickness of 2mils, ensuring consistent quality and performance.
What breakdown voltage can NOMEX covered wire achieve?
The breakdown voltage varies depending on the wrapping process and number of wraps. It ranges from 600V for a single self-locking lapping wrap up to 2500V for a 3-layer reverse lapping configuration, making it suitable for a wide range of transformer applications.
What is the maximum operating temperature for transformers using NOMEX wrapped wire?
Transformers using NOMEX wrapped wire can operate at temperatures up to 220℃ while maintaining the same insulation properties. This is classified as Rank C insulation (220℃), which outperforms the traditional Rank H (180℃) standard and provides greater thermal headroom.
How does NOMEX wrapped wire contribute to a smaller and lighter transformer design?
Because NOMEX insulation allows higher operating temperatures (up to 180–220℃), transformers require fewer wires and smaller ferrite cores to achieve the same output. This results in a more compact and lightweight design, reducing material costs, installation difficulty, and no-load losses.
Is NOMEX covered wire environmentally safe?
Yes. NOMEX is chemically stable, flame retardant, and anti-radiation. It does not release toxic gases even in fire conditions, does not react with solvents, and is resistant to acid and alkali. At the end of its service life, it can be recycled and the waste is biodegradable, causing no environmental pollution.
What wrapping processes are available for NOMEX covered wire?
NOMEX covered wire is available in multiple wrapping configurations including 1.5–2mm self-locking lapping (1 or 2 wraps), 50% lapping (1 or 2 wraps), and 1.5mm reverse lapping (3 wraps). Each configuration offers a different insulation thickness and breakdown voltage to meet specific application requirements.