0102030405
China Suppliers Factory Paper Covered Copper Flat Wire for Oil-Immersed Transformers
Product Information
UL
SGS
RoHS
ISO9001
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
CertificationUL, SGS, RoHS, ISO9001
OEMYes
Thermal Class105℃
Insulation PaperCable paper / Telephone paper / Insulation paper / NOMEX
StandardIEC, NEMA, GB, JIS
Main ApplicationOil-immersed transformer windings
Bobbin30kg / 50kg / 150kg wooden spool or as per customer requirements
Supply Ability1,500 Ton/Month – Telephone Paper Covered Aluminum/Copper Round Wires & Strips
Packaging & Delivery
- Product: Paper Coated Flat Copper Wire
- Inner Packing: 30 / 50 / 150kg wooden spool, various sizes according to wire diameter
- Outer Packing: Wooden case or as per customers' special requirements
- Port: Qingdao, Shanghai, Tianjin
📦 Lead Time
1 – 500 kg
⏱ < 10 Days
> 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 wound with 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 for oil immersed transformer coils and similar electrical coils, with a temperature index of 105℃ after immersion. Available in phone paper, cable paper, high voltage cable paper, and other winding insulation types per customer requirements.
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 per customer requirements. Plain paper covered wire is a special material for oil immersed transformer coils and similar electrical coils, with a temperature index of 105℃ after immersion. Available in phone paper, cable paper, high voltage cable paper, and other winding insulation types 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) | 0.3 | 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 | 0.6 | 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, cable paper, telephone cable paper, 3M paper, NOMEX, MIKITOKU paper, and high voltage cable paper. The specific type can be selected based on your application requirements.
Q What conductor materials and types are available?
Both copper and aluminum conductors are available, supplied as solid conductor types. The round wire diameter ranges from 2.0–7.0mm, while flat wire dimensions are: a: 0.8–5.6mm and b: 2.0–16mm.
Q What is the thermal class rating of this paper coated wire?
The paper coated flat copper wire has a thermal class of 105℃, which applies after oil immersion treatment. This makes it well-suited for oil-immersed transformer windings and similar electrical coil applications.
Q What certifications does the product hold, and which international standards does it comply with?
The product is certified under UL, SGS, RoHS, and ISO9001. It complies with major international standards including IEC, NEMA, GB, and JIS, ensuring quality and safety for global markets.
Q What packaging options and lead times are offered?
The wire is packed on 30kg, 50kg, or 150kg wooden spools as inner packing, with outer packaging in wooden cases or customized as per customer requirements. Lead time is less than 10 days for orders of 1–500kg and approximately 15 days for orders exceeding 500kg. Shipments are dispatched from Qingdao, Shanghai, or Tianjin ports.
Q Is OEM manufacturing available, and what is the monthly supply capacity?
Yes, OEM manufacturing is supported. The monthly supply capacity is up to 1,500 tons of Telephone Paper Covered Aluminum/Copper Round Wires and Strips, making it suitable for large-scale procurement and custom order requirements.