Our paper-wrapped aluminum flat wire combines low-resistance, lightweight aluminum conductors with tightly bonded Kraft/Nomex paper insulation to deliver excellent dielectric strength, compact winding profiles and long service life for oil-immersed and distribution transformers. Ideal when you need cost-effective conductivity with proven insulation performance.
Product Details
Paper-covered aluminum flat wire is a winding made of oxygen-free copper rod (extruded, drawn) or electrical round aluminum rod extruded by a standard die and then wrapped with insulating paper. Paper-covered wire is mainly used for winding wire of oil-immersed transformers.
Production Range
Product model:ZB(L)-0.30-1.25mm;
Thickness-a:0.80-5.60mm;
Width-b:2.00-16.00mm.
Standard:GB/T7673.3-2008/IEC60317-27:1998
If the selected specifications exceed the above range, please contact us. We can customize according to customer's technical requirements.Can be customized according to customer techical requirements
Technical Parameter
| Enameled wire category | Thermal level | Performance | Standard | Experimental basis |
| Polyvinylacetal/Selfadhes iveacetal | 120 | Good performance of resistance to transformer oil and scratch.Excellent flexibility&adhesion,and good hydrolysis resistance In addition to the properties of acetal wire,the product adhesive strength can be reinforced by heating | GBJ 7095.2-2008 IEC60317-18:2004 GBfF 6758.1-2007 IEC 60851-5 | GB/T4074 IEC 60851 GB/T4074 IEC 60851 |
| Polyester | 130 | High mechanical strength,good scratch resistance.Good electrical performance | GBAT 7095.7-2008 IEC60317-11:2005 | GB/T4074 IEC 60851 |
| Modifiedpolyester | 155 | Good shock resistance.High mechanical strength,good electrical&solvent resistance | GBfF 7095.3-2008 IEC60317-16:1990 | GB/T4074 IEC 60851 |
| Polyesterimide | 180 | High hear resistance, good chemical solvent resistance,and heat shock resistance | GBfT 7095.4-2008 IEC60317-28:1990 | GB/T4074 IEC 60851 |
| Polyesterimide/polyamide imidecompositelayer | 200 | Good comprehensive properties,such as refrigerant resistance,solvent resistance and radiation resistance | GB/T 7095.6-2008 IEC60317-29:1990 | GB/T4074 IEC 60851 |
| Polyamideimide | 220 | Good chemical solvent resistance | GB/T 7095.1 | GB/T4074 IEC 60851 |
If you have other customization requirements for Transformer Winding Wire, please contact us！
Paper-Wrapped Aluminum Flat Wire Characteristics
1. Green and environmentally friendly: Cunbang NOMEX paper is a new generation of insulation material used in transformers. It has high chemical stability, flame retardancy, smoldering, self extinguishing and other characteristics.
2. Moisture resistance and good temperature tolerance: After direct air pressure impregnation treatment, NOMEX thousand type transformers can be applied to environments and occasions with large humidity changes.
3. Strong overload resistance: NOMEX paper has stable electrical and physical properties at 220 degrees Celsius, therefore NOMEX dry-type transformers have good overload resistance and are suitable for crushing production enterprises and electric locomotives.
4. Small size, space saving, can be installed and used in small places.
5. High reliability and easy maintenance.
We focus on consistent quality, flexible customization and cost-efficient manufacturing. From precise dimensional control to selectable paper insulation systems, our paper-wrapped aluminum flat wire is engineered for smooth winding, strong dielectric performance and long-term operational reliability. Professional technical support and responsive OEM service help ensure your transformer production runs smoothly and efficiently.
· Specifically designed for primary and secondary windings in oil-immersed and distribution transformers, ensuring stable electrical and mechanical performance.
· Multi-layer Kraft or Nomex paper wrapping provides high dielectric strength while maintaining minimal insulation thickness, helping improve winding efficiency.
· The flat aluminum conductor geometry increases slot fill factor and reduces coil height compared with round wire, supporting more compact transformer designs.
· Available in a wide range of widths, thicknesses and insulation configurations, with multiple thermal class options to meet different operating requirements.
· Stable quality control, scalable production capacity and competitive pricing support both small trial orders and large-volume transformer projects.
Contact us today to request a customized quotation for your paper-wrapped aluminum flat wire requirements.
· Oil-immersed power transformers
· Distribution transformers
· Reactors, chokes and other electrical equipment requiring paper-insulated flat conductors
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