0102030405
China Suppliers Factory Paper Covered Copper Flat Wire for Oil-Immersed Transformers Winding
Product Information
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
Insulation Material
Kraft paper, 3M paper, telephone cable paper, MIKITOKU paper
Diameter
Round: 2.0–7.0 mm | Flat: a: 0.8–5.6 mm, b: 2.0–16 mm
Certification
UL
SGS
RoHS
ISO9001
OEM
Yes
Thermal Class
105℃
Insulation Paper
Cable paper / Telephone paper / Insulation paper / NOMEX
Standard
IEC
NEMA
GB
JIS
Main Application
Oil-immersed transformer windings
Bobbin
30 kg / 50 kg / 150 kg wooden spool or as per customer requirements
Supply Ability
1,500 Ton/Month — Telephone Paper Covered Aluminum/Copper Round Wires & Strips
Packaging & Delivery
📦 Inner Packing: 30 / 50 / 150 kg wooden spool, available in different wooden spools according to wire diameter.
🪵 Outer Packing: Wooden case, or as per customers' special requirements.
🚢 Port: Qingdao | Shanghai | Tianjin
⏱ Lead Time:
1 – 500 kg
Within 10 days
> 500 kg
Within 15 days
About Telephone Cable Paper Covered Wire:
Telephone cable paper covered aluminum wire, also known as plain paper covered insulated aluminum, is manufactured by winding three or more layers of cable paper or telephone paper around the aluminum conductor. Plain paper covered wire is the special material for oil-immersed transformer coils and similar electrical coils, with a temperature index of 105℃ after immersion. Types available include phone paper, cable paper, high voltage cable paper, and other winding insulation papers, as per customer requirements.
Telephone cable paper covered aluminum wire, also known as plain paper covered insulated aluminum, is manufactured by winding three or more layers of cable paper or telephone paper around the aluminum conductor. Plain paper covered wire is the special material for oil-immersed transformer coils and similar electrical coils, with a temperature index of 105℃ after immersion. Types available include phone paper, cable paper, high voltage cable paper, and other winding insulation papers, as per customer requirements.
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 cable paper, telephone paper, 3M paper, high-voltage cable paper, NOMEX paper, and MIKITOKU paper. Customers can specify the type based on their application requirements.
Q
What are the main applications of Paper Coated Flat Copper Wire?
This wire is primarily used for oil-immersed transformer windings, rectifiers, and reactor windings. Its paper insulation provides excellent dielectric properties and mechanical protection in high-voltage and high-temperature environments.
Q
What conductor materials and dimensions are available?
The wire is available in both copper and aluminum conductors. For round wire, the diameter ranges 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.
Q
What certifications does the Paper Coated Flat Copper Wire hold?
The product is certified to UL, SGS, RoHS, and ISO9001 standards, and complies with international standards including IEC, NEMA, GB, and JIS, ensuring reliable quality for global markets.
Q
What packaging options are available and what is the lead time?
The wire is packed on 30 kg, 50 kg, or 150 kg wooden spools, with outer wooden case packaging or customized packaging as required. Lead time is within 10 days for orders of 1–500 kg, and within 15 days for orders exceeding 500 kg.
Q
Is OEM production supported, and what is the supply capacity?
Yes, OEM production is fully supported. 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.