Nomex-Wrapped Rectangular Copper Conductor
ISO-CU-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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Power Transmission Facilities
In switchgear and busbar connections; with busbar, rod and braided conductors.
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ALSO Dry-type transformers
High thermal-class motor windings
Generator excitation windings
Marine and offshore applications
Product Description
This product, combining aramid paper insulation with a copper conductor, is developed for designs where the winding window is limited but a high thermal class is mandatory. Copper's higher conductivity allows the same current to be carried with a section about one third smaller than its aluminium counterpart.
Aramid paper largely retaining its dielectric properties when it takes up moisture is a decisive advantage where dry-type machines run in humid or marine climates. The insulation also withstands sudden temperature rises and short-term overloads without charring.
The paper is assessed to IEC 60819 requirements; the conductor is produced from EN 13601 referenced electrolytic copper. When saturated with impregnating resin, the winding becomes a monolithic block and mechanical strength against short-circuit forces rises.
Applications
Dry-type transformers, high thermal-class motor windings, generator excitation windings, marine and offshore applications.
Related Products
Technical Documentation
| Conductor Material | Electrolytic Copper (Cu-ETP, 99.9%) |
| Standard | IEC 60819 |
| Conductor Size | 2 – 16 mm |
| Thickness / Grade | 0.80 – 5.60 mm |
| Surface | Annealed |
| Product Code | ISO-CU-NMX-F220 |
| Thermal Class | Class 220 (R) |
| Build Increase | 0.80 – 5.60 mm |
| Conductor Section | 1.50 – 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 |
Conductor Dimension and Weight Table (uninsulated section)
| Width b (mm) | Thickness a (mm) | Corner Radius r (mm) | Section (mm²) | Approx. Weight (kg/km) |
|---|---|---|---|---|
| 3.15 | 1.25 | 0.40 | 3.80 | 33.8 |
| 4.00 | 1.60 | 0.50 | 6.19 | 55.0 |
| 5.00 | 2.00 | 0.65 | 9.64 | 85.7 |
| 6.30 | 2.24 | 0.65 | 13.75 | 122.2 |
| 8.00 | 2.50 | 0.80 | 19.45 | 172.9 |
| 10.00 | 3.15 | 0.80 | 30.95 | 275.1 |
| 12.50 | 4.00 | 1.00 | 49.14 | 436.9 |
| 16.00 | 5.00 | 1.25 | 78.66 | 699.3 |
Our Nomex-Wrapped Rectangular Copper 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: Electrolytic Copper (Cu-ETP, 99.9%)
- Thermal class: Class 220 (R)
- Wall thickness: 0.80 – 5.60 mm
- Diameter range: 2 – 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.