Nomex-Wrapped Rectangular Aluminium Conductor
ISO-AL-NMX-F220
CROSS-SECTION & LAYERS
Aramid Paper (Nomex®) Insulated Wires
The core and insulation layers are shown to scale as a representation; refer to the datasheet for exact thickness and tolerance values.
APPLICATIONS
Where Is This Product Used?
The gold area in the scenes shows where the conductor sits in the machine.
Distribution Transformer Manufacturers
In distribution and dry-type transformer coils; with enamel, Nomex and film insulated wires.
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Wind Turbine Generators
In nacelle generator windings; with high thermal-class insulated wires.
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ALSO Dry-type transformers
Indoor distribution transformers
Metro and tunnel supply transformers
Hospital and mall installations
Wind turbine nacelle transformers
Product Description
Unlike cellulose, aramid paper is produced from synthetic aromatic polyamide fibre. It withstands high temperature without charring, does not support flame propagation and largely retains its dielectric properties when it takes up moisture. These three properties form the technical basis for dry-type transformers being able to run oil-free.
Combined with an aluminium conductor, the resulting winding is both light and high in thermal class. Class 220 (R) insulation widens the overload window by allowing a higher temperature rise in a machine of the same physical size; in facilities with a variable load profile this turns directly into operational flexibility.
The aramid papers used are assessed to the non-cellulosic electrical paper requirements under IEC 60819; the thermal-class definition is based on IEC 60085. The paper is wound with half-overlap onto the conductor and saturated with impregnating resin on request.
Applications
Dry-type transformers, indoor distribution transformers, metro and tunnel supply transformers, hospital and mall installations, wind turbine nacelle transformers.
Related Products
Technical Documentation
| Conductor Material | EN AW-1370 Aluminium (99.7%) |
| Standard | IEC 60819 |
| Conductor Size | 3 – 16 mm |
| Thickness / Grade | 1.00 – 5.60 mm |
| Surface | Soft annealed |
| Product Code | ISO-AL-NMX-F220 |
| Thermal Class | Class 220 (R) |
| Build Increase | 1.00 – 5.60 mm |
| Conductor Section | 3.00 – 90.00 mm² |
| Insulation Type | Nomex type aramid paper, half-overlap |
| Winding Type | Helical paper winding |
| Test Certificate | EN 10204 3.1 + paper declaration of conformity |
| Impregnation Compatibility | Suitable for VPI and cast-resin systems |
Aramid Paper Insulation Structure
| Winding Layer | Tape Width (mm) | Overlap Ratio (%) | Total Build Increase (mm) | Thermal Class |
|---|---|---|---|---|
| 1 layers aramid paper | 15 | 50 | 0.10 | Class 220 (R) |
| 2 layers aramid paper | 20 | 50 | 0.20 | Class 220 (R) |
| 3 layers aramid paper | 20 | 50 | 0.30 | Class 220 (R) |
| 4 layers aramid paper | 25 | 50 | 0.40 | Class 220 (R) |
| 6 layers aramid paper | 25 | 50 | 0.60 | Class 220 (R) |
Conductor Dimension and Weight Table (uninsulated section)
| Width b (mm) | Thickness a (mm) | Corner Radius r (mm) | Section (mm²) | Approx. Weight (kg/km) |
|---|---|---|---|---|
| 4.00 | 1.60 | 0.50 | 6.19 | 16.7 |
| 5.00 | 2.00 | 0.65 | 9.64 | 26.0 |
| 6.30 | 2.24 | 0.65 | 13.75 | 37.1 |
| 8.00 | 2.50 | 0.80 | 19.45 | 52.5 |
| 10.00 | 3.15 | 0.80 | 30.95 | 83.6 |
| 12.50 | 4.00 | 1.00 | 49.14 | 132.7 |
| 16.00 | 5.00 | 1.25 | 78.66 | 212.4 |
Our Nomex-Wrapped Rectangular Aluminium Conductor product is supplied in accordance with internationally accepted manufacturing and inspection standards. Dimensional tolerances, material chemical analysis and mechanical values meet the requirements of the relevant standard.
- Manufacturing standard: IEC 60819
- Conductor material: EN AW-1370 Aluminium (99.7%)
- Thermal class: Class 220 (R)
- Wall thickness: 1.00 – 5.60 mm
- Diameter range: 3 – 16 mm
- Visual inspection and dimensional control are carried out before shipment.
If your project requires a different standard, you can consult our technical team for alternative products.
On request, the products we supply are shipped together with an EN 10204 3.1 material certificate. Our quality management system and product documents are updated regularly; batch-based traceability is provided.
Communicating your certificate request at the quotation stage speeds up the shipment process.
ISO 9001:2015 Quality Management System
ISO 14001 Environmental Management System
ISO 45001 Occupational Health and Safety Management System
EN 10204 3.1 Material Certificate
IEC 60317 Declaration of Conformity
IATF 16949 Automotive Quality Management System
REACH Declaration of Conformity
RoHS Declaration of Conformity
Note: The values in the datasheet are nominal. For requests outside the standards and dimensions above, reach us through the quote form; non-catalogue dimensions are planned according to the production schedule.