0102030405
China Suppliers Factory Paper Covered Copper Flat Wire for Oil-Immersed Transformers
Product Information
Place of OriginJiangsu, China
Brand Namehengte Electric Wire
Model NumberPaper Coated Flat Copper Wire
TypeInsulated
ApplicationOil-immersed transformer, rectifier, reactors winding
Conductor MaterialCopper or Aluminum
Conductor TypeSolid
Insulation MaterialKraft paper, 3M paper, Telephone cable paper, MIKITOKU paper
DiameterRound: 2.0–7.0mm | Flat: a: 0.8–5.6mm, b: 2.0–16mm
Thermal Class105℃
Insulation PaperCable paper / Telephone paper / Insulation paper / NOMEX
StandardIEC, NEMA, GB, JIS
Main ApplicationOil-immersed transformer windings
OEMYes
Bobbin30kg / 50kg / 150kg wooden spool or per customer requirements
Supply Ability1,500 Ton/Month
✔ UL
✔ SGS
✔ RoHS
✔ ISO9001
Packaging & Delivery
- Product: Paper Coated Flat Copper Wire
- Inner Packing: 30 / 50 / 150kg wooden spool, in different wooden spools 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 / 3M paper / MIKITOKU covered wire — oil immersed transformer winding 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 per 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. Available types include: phone paper, cable paper, high voltage cable paper, and other winding insulation papers.
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 per 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. Available types include: phone paper, cable paper, high voltage cable paper, and other winding insulation papers.
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
QWhat is Paper Coated Flat Copper Wire used for?
Paper Coated Flat Copper Wire is primarily used for oil-immersed transformer windings, rectifiers, and reactor coils. The paper insulation provides excellent dielectric strength and thermal stability, making it ideal for high-voltage electrical applications.
QWhat types of insulation paper are available for this wire?
The wire can be insulated with various paper types including telephone cable paper, cable paper, high voltage cable paper, kraft paper, 3M paper, MIKITOKU paper, and NOMEX paper. The specific paper type can be selected based on application requirements and customer specifications.
QWhat conductor materials and sizes are available?
Both copper and aluminum conductors are available. For round wire, diameters range from 2.0mm to 7.0mm. For flat wire, dimension "a" ranges from 0.8mm to 5.6mm and dimension "b" ranges from 2.0mm to 16mm. Custom sizes can also be produced per customer requirements.
QWhat certifications does this product hold?
The Paper Coated Flat Copper Wire is certified to UL, SGS, RoHS, and ISO9001 standards. It also complies with international standards including IEC, NEMA, GB, and JIS, ensuring reliable quality for global markets.
QWhat is the thermal class rating and what does it mean?
The product has a Thermal Class of 105℃. This means that after oil immersion, the insulation system is rated to operate continuously at temperatures up to 105℃ without significant degradation, which is suitable for oil-immersed transformer applications.
QWhat are the packaging options and lead times?
The wire is packed on 30kg, 50kg, or 150kg wooden spools as inner packing, with wooden cases as outer packing. Custom packaging is available upon request. For orders of 1–500kg, the lead time is less than 10 days. For orders exceeding 500kg, the lead time is approximately 15 days. Shipment ports include Qingdao, Shanghai, and Tianjin.