Transformer Winding Conductor

Paper Covered Copper Wires

Premium Insulated Copper Conductors for Transformer & Heavy Electrical Applications

Paper Covered Copper Wires are specially manufactured conductors designed for transformer windings and other electrical applications where superior insulation, excellent electrical conductivity, and long-term reliability are essential. These conductors are produced using high-conductivity electrolytic copper and wrapped with one or more layers of high-quality insulating paper, providing exceptional dielectric strength and compatibility with insulating oils used in transformers.

At Shreyas Wires, we supply high-quality Paper Covered Copper Wires for transformer manufacturers, electrical equipment manufacturers, repair industries, OEMs, and industrial customers. Our products are designed to deliver consistent electrical performance, mechanical strength, and dependable insulation for demanding applications.

Whether you require paper covered copper conductors for power transformers, distribution transformers, reactors, or specialised electrical equipment, our products provide reliable performance that meets the needs of modern electrical systems.

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Product Overview

What are Paper Covered Copper Wires?

Paper Covered Copper Wires are copper conductors insulated by wrapping one or more layers of electrical-grade insulating paper around the conductor. Unlike enamelled winding wires, paper-covered conductors are primarily used in oil-filled transformers where the paper insulation becomes impregnated with transformer oil, creating a highly reliable insulation system with excellent dielectric properties.

The paper covering also provides additional mechanical protection during winding and improves resistance to electrical stress, making these conductors suitable for medium and high-voltage transformer applications. Paper-covered conductors are widely used in transformer manufacturing because of their excellent compatibility with mineral oil and synthetic insulating fluids.

Paper insulated copper conductors for transformer windings

Product Highlights

Features of Paper Covered Copper Wires

Our Paper Covered Copper Wires are manufactured to provide dependable performance in demanding electrical applications.

Manufactured using high-conductivity electrolytic copper
Uniform paper insulation covering
Excellent electrical conductivity
High dielectric strength
Superior thermal performance
Excellent mechanical flexibility
Smooth conductor surface for efficient winding
Consistent insulation thickness
Compatible with transformer oils
High resistance to electrical stress
Long operational service life
Suitable for oil-filled transformer applications
Available in multiple paper insulation configurations

Product Range

Paper Insulation Options

The choice of insulation depends on transformer design, operating temperature, and voltage requirements.

Kraft Paper

Electrical-grade Kraft Paper is the most commonly used insulation material for transformer windings. It offers excellent dielectric strength, mechanical stability, and compatibility with transformer oil.

Thermally Upgraded Kraft Paper (TUK)

Thermally upgraded paper is designed for higher operating temperatures and extended insulation life in demanding transformer applications.

Crepe Paper

Crepe paper provides improved flexibility, allowing easier winding while maintaining excellent insulation performance.

Nomex® Paper

For specialised high-temperature applications, Nomex® paper insulation offers exceptional thermal endurance and electrical insulation characteristics. It is commonly used in dry-type transformers and high-performance electrical equipment.

Paper Covering Configurations

Paper Covered Copper Wires are available with different insulation builds depending on application requirements — Single Paper Covered (SPC), Double Paper Covered (DPC), Triple Paper Covered (TPC), and Multi-Layer Paper Covered. The insulation thickness is selected according to transformer voltage ratings, insulation coordination, and customer specifications.

Specifications

Technical Specifications

Conductor Material	High Conductivity Electrolytic Copper (EC Grade)
Conductor Types	Round Copper Wire Rectangular Copper Conductor
Insulation Materials	Electrical Grade Kraft Paper Thermally Upgraded Kraft Paper Crepe Paper Nomex® Paper (on request)
Covering Configurations	Single Paper Covered (SPC) Double Paper Covered (DPC) Triple Paper Covered (TPC) Multi-Layer Paper Covered
Surface Finish	Uniform paper covering with smooth conductor finish for efficient winding operations.
Applicable Standards	Commonly manufactured in accordance with recognised Indian and international standards, including IS 7404 for transformer winding conductors where applicable.

Where It’s Used

Applications

Paper Covered Copper Wires are widely used across the electrical power industry because of their excellent insulation properties and dependable electrical performance.

Transformer Manufacturing

Distribution Transformers
Power Transformers
Oil-Immersed Transformers
Furnace Transformers
Instrument Transformers

Heavy Electrical Equipment

Reactors
Voltage Regulators
Welding Transformers
Chokes
Industrial Coils

Power Generation & Distribution

Utility Transformers
Electrical Substations
Power Distribution Equipment
Renewable Energy Systems

Repair & Rewinding

Transformer Repair
Transformer Rewinding
Maintenance of Electrical Equipment

Why Paper Covered Copper

Advantages of Paper Covered Copper Wires

Paper-covered copper conductors remain the preferred choice for oil-immersed transformers because of their excellent dielectric strength, thermal performance, and compatibility with insulating oils.

Excellent Conductivity

Copper provides outstanding electrical conductivity, enabling efficient current flow with minimal energy loss.

Superior Insulation

The paper insulation system offers high dielectric strength and excellent electrical separation between winding turns.

Oil Compatibility

Paper insulation readily absorbs transformer oil, creating a highly effective insulation system that improves cooling and electrical performance.

High Mechanical Strength

Copper conductors withstand the mechanical forces generated during transformer operation and short-circuit conditions.

Long Service Life

When properly installed and maintained, paper-covered copper windings provide decades of dependable service in power transformers.

Our Commitment

Quality Assurance

At Shreyas Wires, we understand that transformer reliability begins with the quality of its conductors. Every product is supplied with a focus on delivering dependable performance for demanding transformer applications.

Our Paper Covered Copper Wires are selected to ensure:

High-purity copper conductors
Accurate conductor dimensions
Uniform paper insulation
Excellent dielectric strength
Consistent winding characteristics
Reliable mechanical performance
Long operational durability

Who We Serve

Industries We Serve

Our Paper Covered Copper Wires are supplied to a wide range of industries.

Transformer Manufacturers Electrical Equipment Manufacturers Power Utilities Transformer Repair Workshops OEM Manufacturers Industrial Machinery Manufacturers Renewable Energy Equipment Manufacturers Heavy Engineering Industries Electrical Contractors Infrastructure Projects

Paper covered copper wire manufacturing at Shreyas Magnametals

Our Advantage

Why Choose Shreyas Wires?

Established Industry Experience

Serving the electrical industry since 2007 with quality winding conductors and electrical products.

Comprehensive Product Portfolio

We offer enamelled copper wires, enamelled aluminium wires, paper-covered copper and aluminium conductors, bus bars, foils, and other electrical solutions.

Reliable Product Quality

Our products are selected to provide consistent performance, dimensional accuracy, and dependable insulation.

Technical Assistance

Our experienced team helps customers identify the appropriate conductor type, insulation build, and specification based on application requirements.

Customer-Focused Service

We are committed to providing responsive support, dependable supply, and long-term customer relationships.

Have Questions?

Frequently Asked Questions

Paper Covered Copper Wires are copper conductors wrapped with one or more layers of electrical insulating paper for use in transformer windings and heavy electrical equipment.

They are primarily used in oil-immersed transformers, power transformers, distribution transformers, reactors, and other electrical equipment requiring paper-insulated conductors.

Common insulation options include Kraft Paper, Thermally Upgraded Kraft Paper, Crepe Paper, and Nomex® paper for specialised applications.

Double Paper Covered (DPC) conductors have two layers of insulation paper, while Triple Paper Covered (TPC) conductors have three layers, providing additional insulation thickness and dielectric strength.

Copper offers excellent electrical conductivity, superior mechanical strength, and reliable thermal performance, making it the preferred conductor material for many transformer applications.

Yes. Paper Covered Copper Wires can be supplied in various diameters, insulation builds, and paper covering configurations based on customer specifications.

Yes. They are specifically designed for oil-immersed transformer windings, where the paper insulation works together with transformer oil to provide excellent electrical insulation and cooling performance.

The correct conductor depends on the transformer design, voltage class, current rating, insulation requirement, and winding configuration. Our technical team can assist in selecting the most suitable product.

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Paper Covered Copper Wires

Paper Covered Copper Wires

Premium Insulated Copper Conductors for Transformer & Heavy Electrical Applications

What are Paper Covered Copper Wires?

Features of Paper Covered Copper Wires