Electrical Grade Insulation Crepe Paper For Transformer

Insulation Crepe paper is made from electrical kraft paper through a creping process. The paper surface is wrinkled and stretchable, so it can wrap closely around conductors, leads and curved insulation points without breaking as easily as flat kraft paper.

For oil-immersed transformers, crepe paper is a practical insulation material because it combines flexibility, oil absorption and electrical insulation in one product.

What Is Electrical Grade Insulation Crepe Paper?

Electrical grade insulation crepe paper is a flexible cellulose insulation paper used mainly in transformer insulation systems.

Compared with ordinary kraft insulation paper, crepe paper has a wrinkled structure. This structure gives the paper better elongation and allows it to follow the shape of winding leads and conductors more easily.

In simple terms:

Kraft paper is better for flat wrapping and layer insulation.

Crepe paper is better for bending areas, lead insulation and irregular shapes.

This is why transformer workshops often keep crepe paper as a regular insulation material, especially for conductor wrapping, lead insulation and repair work.

Why Transformers Need Crepe Paper

Transformer insulation is not only about dielectric strength. The material must also be easy to install in real winding conditions.

Inside an oil-immersed transformer, crepe paper is useful because it can:

• wrap tightly around copper or aluminum conductors

• cover bent leads without cracking

• absorb transformer oil after drying and impregnation

• stay compatible with the oil-paper insulation system

• provide local insulation where rigid materials are not suitable

A flat paper may work well on a straight surface, but it can wrinkle badly or tear when wrapped around a sharp bend. Crepe paper solves this problem because its structure already has stretch and flexibility.

Where Crepe Paper Is Used in Transformers

Lead Insulation

Transformer leads are rarely perfectly straight. They often pass through tight spaces and bend around other insulation structures. Crepe paper can be wrapped around these leads to provide flexible electrical insulation.

Conductor Wrapping

Crepe paper is used to wrap copper or aluminum conductors where a flexible cellulose insulation layer is needed.

Coil Connection Areas

Connection points and transition areas are often difficult to insulate with rigid paper or pressboard. Crepe paper can fit these irregular positions more easily.

Transformer Repair and Rewinding

In repair work, the original geometry is not always clean or standard. Crepe paper is useful because it can adapt to existing lead paths and winding shapes.

Crepe Paper Tubes and Tapes

Crepe paper can also be converted into tubes or tapes for lead covering, conductor protection and local insulation work.

Main Features

1. Flexible Wrapping Performance: The creped structure allows the paper to stretch and follow curved surfaces.

2. Good Oil Absorption: After drying and oil impregnation, the paper works as part of the transformer oil-paper insulation system.

3. Practical Electrical Insulation: Suitable for local insulation, conductor wrapping and lead insulation in oil-filled transformers.

4. Easy Workshop Handling: It can be wrapped by hand or processed into slit rolls, tapes and tubes according to production needs.

Heat-resistance: Class A 105℃

Thickness(mm): 0.05-0.13

Width(mm): 15-900(or customized)

Color: brown, black, green

Supply Form: Rolls, Slit Rolls, Tapes, Tubes

Video of Insulation Crepe Paper:

Available Supply Forms

Chengrui Insulation can supply crepe paper in different forms according to the customer's process.

Crepe Paper Rolls: Used for general transformer insulation and wrapping work.

Slit Crepe Paper Rolls: Slit to the required width for conductor wrapping or workshop production.

Crepe Paper Tape: Used for narrow wrapping areas and local insulation.

Crepe Paper Tubes: Used for transformer lead insulation and conductor protection.

What Chengrui Can Support

Chengrui Insulation supplies electrical grade insulation crepe paper for transformer manufacturers, transformer repair workshops, conductor manufacturers and insulation material distributors.

We can help customers confirm the crepe paper thickness, width, tube size, tape width, packing method and export delivery requirements

For transformer projects, the right crepe paper is not selected only by price. It should match the conductor size, lead shape, wrapping method and oil-filled insulation system.

FAQ

Q1: What is transformer crepe paper used for?

A: It is mainly used for lead insulation, conductor wrapping, local insulation and transformer repair work.

Q2: Why use crepe paper instead of flat kraft paper?

A: Crepe paper is more flexible and can wrap around bends, leads and irregular shapes more easily.

Q3: Is crepe paper suitable for oil-immersed transformers?

A: Yes. It is commonly used in oil-filled transformer insulation systems.

Electrical grade insulation crepe paper is a practical flexible insulation material for oil-immersed transformers. It is especially useful in positions where flat insulation paper is difficult to apply, such as leads, conductor bends, coil connection areas and repair work.

Chengrui Insulation supplies crepe paper rolls, slit rolls, tapes and tubes for transformer manufacturers and repair workshops. If you need flexible transformer insulation paper for winding, lead covering or conductor protection, we can help confirm the right supply form and specification for your project.