0102030405
China Suppliers Factory Paper Covered Copper Flat Wire for Oil-Immersed Transformers
Product Information
✔ UL Certified
✔ SGS Certified
✔ RoHS Compliant
✔ ISO 9001
✔ OEM Available
Place of Origin
Jiangsu, China
Brand Name
Hengte Electric Wire
Model Number
Paper Coated Flat Copper Wire
Type
Insulated
Application
Oil-immersed transformer, rectifier, reactors winding
Conductor Material
Copper or Aluminum
Conductor Type
Solid
Thermal Class
105℃
Diameter (Round)
2.0 – 7.0 mm
Diameter (Flat)
a: 0.8–5.6 mm | b: 2.0–16 mm
Standard
IEC, NEMA, GB, JIS
Main Application
Oil-immersed transformer windings
Insulation Material
Kraft paper, 3M paper, Telephone cable paper, MIKITOKU paper, NOMEX
Bobbin
30kg / 50kg / 150kg wooden spool or per customer requirement
Supply Ability
1,500 Ton/Month — Telephone Paper Covered Aluminum / Copper Round Wires & Strips
Packaging & Delivery
📦 Packaging Details — Paper Coated Flat Copper Wire
Inner Packing: 30 / 50 / 150 kg wooden spool — different spools available according to wire diameter
Outer Packing: Wooden case or per customer's special requirement
Port: Qingdao | Shanghai | Tianjin
Lead Time
Quantity: 1 – 500 kg
＜ 10 Days
Quantity: ＞ 500 kg
15 Days
Telephone cable paper covered aluminum wire, also known as plain paper covered insulated aluminum, is manufactured according to customer requirements — winding three or more layers of cable paper or telephone paper around the aluminum conductor. Plain paper covered wire is a special material used for oil-immersed transformer coils and similar electrical coils, rated at a temperature index of 105℃ after immersion. Available types include: phone paper, cable paper, high voltage cable paper, and other winding insulation grades.
Product Tech Information
| Project Name | Standard | Test Tool |
| Conductor Size and R Corner Radius | Follow standard of GB/T7673.1-87 | Micrometer and R type |
| Bend | The specimen is not cracked, no crack, no obvious sticking out of the paper according to the standard curve. | Experimental round rod and flat wire bending apparatus |
Paper Covered Round Wire Insulation Thickness
| Standard Insulation Thickness (mm) | 0.30 | 0.45 | 0.80 | 1.20 | 1.80 | 4.25 |
| Tolerance (mm) | ±0.05 | ±0.05 | ±0.10 | ±0.12 | ±0.15 | ±0.30 |
Paper Covered Flat Wire Insulation Thickness
| Standard Insulation Thickness (mm) | 0.45 | 0.60 | 0.95 | 1.35 | 1.60 | 1.95 | 2.45 | 2.95 |
| Maximum Insulation Thickness (A-a) | 0.57 | 0.74 | 1.14 | 1.56 | 1.84 | 2.23 | 2.77 | 3.32 |
| Minimum Insulation Thickness (B-b) | 0.40 | 0.53 | 0.85 | 1.20 | 1.45 | 1.80 | 2.30 | 2.75 |
❓ Frequently Asked Questions
Q
What types of insulation paper are available for the paper coated flat copper wire?
The wire is available with several insulation paper options, including kraft paper, telephone cable paper, 3M paper, MIKITOKU paper, high voltage cable paper, and NOMEX. Customers can specify their preferred insulation type based on application requirements.
Q
What is the thermal class rating of this paper covered wire?
The paper coated flat copper wire has a thermal class rating of 105℃, which applies after oil immersion treatment. This makes it suitable for use in oil-immersed transformer windings and similar electrical coil applications.
Q
What conductor materials and dimensions are available?
Both copper and aluminum conductors are available. For round wire, diameters range from 2.0 to 7.0 mm. For flat wire, dimension "a" ranges from 0.8 to 5.6 mm and dimension "b" ranges from 2.0 to 16 mm. Custom dimensions can be arranged per customer requirements.
Q
What certifications does this product hold?
The paper coated flat copper wire is certified under UL, SGS, RoHS, and ISO 9001 standards. It also conforms to international standards including IEC, NEMA, GB, and JIS, ensuring quality and compliance for global markets.
Q
What are the packaging options and lead times?
The wire is packed on 30 kg, 50 kg, or 150 kg wooden spools as inner packaging, with wooden cases as outer packaging. Custom packaging is available upon request. Lead time is less than 10 days for orders of 1–500 kg, and 15 days for orders exceeding 500 kg. Shipment is available from Qingdao, Shanghai, and Tianjin ports.
Q
Is OEM manufacturing supported, and what is the monthly supply capacity?
Yes, OEM orders are fully supported. The factory can produce custom specifications according to customer drawings or samples. The monthly supply capacity is up to 1,500 tons of telephone paper covered aluminum/copper round wires and strips, ensuring reliable delivery for large-scale procurement needs.