0102030405
China Suppliers Factory Paper Covered Copper Flat Wire for Oil-Immersed Transformers
Product Information
Jiangsu, China
UL · SGS · RoHS · ISO9001
Thermal Class: 105℃
IEC · NEMA · GB · JIS
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: 2.0–7.0mm | Flat a: 0.8–5.6mm, b: 2.0–16mm
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:
30kg / 50kg / 150kg wooden spool or per customer requirements
Supply Ability:
1,500 Tons per Month
Packaging & Delivery
Inner Packing:
30 / 50 / 150kg wooden spool, varies by wire diameter
Outer Packing:
Wooden case or per customers' special requirement
Port:
Qingdao, Shanghai, Tianjin
⏱ Lead Time
| Quantity (kilograms) | 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 manufactured by winding 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 for oil immersed transformer coils and similar electrical coils, operating at a temperature index of 105℃ after immersion. It can be classified into 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
| Parameter | 0.3 | 0.45 | 0.80 | 1.20 | 1.80 | 4.25 |
|---|---|---|---|---|---|---|
| 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
| Parameter | 0.45 | 0.6 | 0.95 | 1.35 | 1.60 | 1.95 | 2.45 | 2.95 |
|---|---|---|---|---|---|---|---|---|
| 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 (mm) | 0.57 | 0.74 | 1.14 | 1.56 | 1.84 | 2.23 | 2.77 | 3.32 |
| Minimum Insulation Thickness B-b (mm) | 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 paper coated flat copper wire is available with several insulation paper options, including cable paper, telephone paper (3M paper), high voltage cable paper, kraft paper, MIKITOKU paper, and NOMEX paper. The specific type can be selected based on your application and performance requirements.
Q
What is the thermal class rating of this paper covered wire?
The paper covered flat copper wire carries a thermal class rating of 105℃. This rating applies after immersion processing and makes the wire suitable for use in oil-immersed transformer windings and similar electrical coil applications.
Q
What conductor materials and dimensions are offered?
Both copper and aluminum conductors are available, in solid form. For round wire, the diameter range is 2.0–7.0mm. For flat wire, dimension "a" ranges from 0.8–5.6mm and dimension "b" ranges from 2.0–16mm, covering a wide range of transformer winding requirements.
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 IEC, NEMA, GB, and JIS international standards, ensuring it meets global quality and safety requirements for electrical and transformer applications.
Q
What are the packaging options and how is the product delivered?
The wire is wound on wooden spools of 30kg, 50kg, or 150kg depending on wire diameter, then packed in wooden cases for export. Customized packaging is available upon request. Shipments are dispatched from Qingdao, Shanghai, or Tianjin ports. Lead time is within 10 days for orders up to 500kg, and 15 days for larger quantities.
Q
Is OEM or custom specification manufacturing available?
Yes, OEM manufacturing is fully supported. Customers can specify conductor material (copper or aluminum), insulation paper type, wire dimensions, insulation thickness, and spool size. The factory's monthly supply capacity is up to 1,500 tons, ensuring reliable delivery for both small and large orders.