Paper-Insulated Stranded Copper Wire

Product Description

Paper-Insulated Stranded Copper Wire is manufactured from high-conductivity copper strands covered with high-quality electrical insulating paper. The stranded construction provides improved flexibility and bending performance compared with solid conductors, while the paper insulation provides reliable dielectric protection and thermal stability.

Different conductor configurations, strand arrangements, paper types, wrapping methods, insulation thicknesses, and finished dimensions can be customized according to transformer winding design and equipment requirements.

The product is designed for demanding electrical applications and is widely used in power transformers, oil-immersed transformers, distribution transformers, reactors, furnace transformers, traction transformers, rectifier transformers, and other high-voltage electrical equipment.

Applications

• Power Transformers

• Oil-Immersed Transformers

• Distribution Transformers

• Furnace Transformers

• Traction Transformers

• Rectifier Transformers

• Reactors and Chokes

• High-Voltage Electrical Equipment

• Transformer Windings

• Industrial Power Equipment

Standards

• IEC Standards, where applicable

• ASTM Standards, where applicable

• Transformer Industry Specifications

• Customer Technical Specifications

The applicable standard can be confirmed according to the final product design and intended application.

Construction

Technical Data

Stranding Configuration

The stranded copper conductor can be manufactured with different strand arrangements to meet specific electrical, mechanical, and winding requirements.

Typical configurations include:

• Concentric Stranding

• Compact Stranding

• Flexible Stranding

• Multi-Layer Stranding

• Customized Strand Arrangement

The strand structure can be optimized according to conductor cross-section, current-carrying requirements, bending radius, winding dimensions, and thermal conditions.

Paper Insulation Options

The product can be supplied with different electrical insulating paper systems according to the required dielectric and mechanical performance.

Available options include:

• Electrical Kraft Paper

• Crepe Paper

• Diamond Dotted Paper

• Multi-Layer Paper Insulation

• Composite Paper Insulation

• Customized Insulation Systems

For oil-immersed transformer applications, the selected paper insulation system should be confirmed for compatibility with the specified insulating fluid and operating conditions.

Key Features

• High electrical conductivity

• High-purity copper conductor

• Flexible stranded construction

• Reliable paper insulation

• Excellent winding performance

• Good mechanical strength

• High dielectric performance

• Stable thermal performance

• Multiple strand configurations

• Multiple paper insulation options

• Suitable for transformer winding applications

• Customized conductor dimensions

• Customized strand count and diameter

• Customized paper thickness and coverage

• Suitable for continuous and intermittent operation

Quality Control

Each production stage is subject to controlled inspection and testing to ensure stable product quality.

Typical inspection items include:

• Conductor Diameter

• Conductor Cross-Section

• Strand Diameter

• Strand Count

• Surface Quality

• DC Resistance

• Paper Thickness

• Insulation Dimensions

• Insulation Appearance

• Wrapping Quality

• Dimensional Accuracy

• Final Product Inspection

Additional electrical and mechanical tests can be performed according to customer requirements.

Customization

PI-SC can be manufactured according to customer drawings, transformer winding specifications, and technical requirements.

Customization options include:

• Conductor Cross-Section

• Strand Diameter

• Number of Strands

• Conductor Shape

• Strand Arrangement

• Paper Type

• Paper Thickness

• Number of Paper Layers

• Wrapping Direction

• Overlap Ratio

• Finished Dimensions

• Manufacturing Length

• Packaging Method

Technical drawings and detailed specifications can be reviewed before production.

Packaging

The product can be supplied in:

• Wooden Drums

• Plywood Drums

• Reels

• Coils

• Customized Packaging

Packaging is designed to protect the conductor and paper insulation from mechanical damage, moisture, contamination, and deformation during transportation and storage.

Typical Applications by Equipment

FAQ

1. What is Paper-Insulated Stranded Copper Wire?

It is a stranded copper conductor wrapped with electrical insulating paper, primarily designed for transformer and electrical equipment winding applications.

2. What equipment is it used in?

It is commonly used in power transformers, oil-immersed transformers, distribution transformers, furnace transformers, traction transformers, rectifier transformers, reactors, and other electrical equipment.

3. Can the conductor size be customized?

Yes. Strand diameter, strand count, conductor cross-section, conductor shape, and finished dimensions can be manufactured according to customer requirements.

4. What types of paper insulation are available?

Common options include electrical Kraft paper, crepe paper, diamond dotted paper, multi-layer paper insulation, and customized insulation systems.

5. Can it be used in oil-immersed transformers?

Yes. The product can be designed for oil-immersed transformer applications. Compatibility between the selected paper insulation system and the specified transformer insulating fluid should be confirmed.

6. Can rectangular stranded conductors be supplied?

Yes. Round, rectangular, and specially configured stranded copper conductors can be manufactured according to specific winding designs.

7. Can the strand configuration be customized?

Yes. Strand diameter, strand count, arrangement, and conductor construction can be customized according to electrical and mechanical requirements.

8. How is the product packaged?

Depending on conductor size and customer requirements, the product can be supplied on reels, coils, wooden drums, or plywood drums.

9. Can you manufacture according to customer drawings?

Yes. PI-SC can be manufactured according to technical drawings, conductor dimensions, strand arrangements, insulation requirements, winding specifications, and packaging requirements.