0102030405
China Suppliers Factory: Paper Covered Copper Flat Wire for Oil-Immersed Transformers
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
Diameter (Flat)
a: 0.8 – 5.6 mm | b: 2.0 – 16 mm
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 per customer requirements
OEM
Yes
Supply Ability
1,500 Ton per Month
Certifications:
UL
SGS
RoHS
ISO 9001
Packaging & Delivery
📦 Packaging Details — Paper Coated Flat Copper Wire
Inner Packing
30 / 50 / 150 kg wooden spool (varies by wire diameter)
Outer Packing
Wooden case or per customer's special requirement
Port
Qingdao, Shanghai, Tianjin
Lead Time Notice: Orders under 500 kg ship within 10 days. Orders over 500 kg ship within 15 days.
| Quantity (kg) | Lead Time |
|---|---|
| 1 – 500 kg | < 10 days |
| > 500 kg | 15 days |
Telephone cable paper / 3M paper / MIKITOKU covered wire is designed for oil-immersed transformer winding applications. Telephone cable paper covered aluminum wire, also known as plain paper covered insulated aluminum, is wound with three or more layers of cable paper or telephone paper around the aluminum conductor, according to customer requirements. Plain paper covered wire is a special material used for oil-immersed transformer coils and similar electrical coils, with a temperature index of 105 ℃ after immersion. Depending on customer requirements, it can be divided into phone paper, cable paper, high-voltage cable paper, and other winding insulation types.
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
| Specification | 0.30 mm | 0.45 mm | 0.80 mm | 1.20 mm | 1.80 mm | 4.25 mm |
|---|---|---|---|---|---|---|
| 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
| Specification | 0.45 | 0.6 | 0.95 | 1.35 | 1.60 | 1.95 | 2.45 | 2.95 |
|---|---|---|---|---|---|---|---|---|
| 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 multiple insulation paper options including kraft paper, 3M paper, telephone cable paper, MIKITOKU paper, high-voltage cable paper, and NOMEX. The choice depends on the specific application and customer requirements.
Q
What is the thermal class rating of this paper coated wire?
The paper coated flat copper wire has a thermal class rating of 105 ℃, which applies after the oil-immersion treatment used in transformer winding applications.
Q
What conductor materials and dimensions are available?
Both copper and aluminum conductors are available. 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 under UL, SGS, RoHS, and ISO 9001, ensuring compliance with international quality and safety standards. It also conforms to IEC, NEMA, GB, and JIS standards.
Q
What is the typical lead time and packaging for orders?
Orders of 1–500 kg are delivered within 10 days. Orders exceeding 500 kg require approximately 15 days. Products are packed on 30 kg, 50 kg, or 150 kg wooden spools, with outer wooden cases, and shipped from Qingdao, Shanghai, or Tianjin ports.
Q
Is OEM / custom production available for this wire?
Yes, OEM production is fully supported. Customers can specify conductor material, wire dimensions, insulation paper type, spool size, and other parameters. The factory has a supply capacity of up to 1,500 tons per month.