New Materials for Green Transformers

Green transformers are cost-effective and environmentally responsible, ideal for transmitting and distributing electricity. They boast enhanced performance and improved longevity while requiring minimal maintenance and are key to minimizing fire risks, lowering CO2 emissions, and limiting pollution in energy applications.

As the scope of renewable energy projects expands and there is an increased focus on limiting energy loss during power transmission and distribution, design engineers continually search for ways to improve green transformers’ longevity and performance.

Key features like mechanical and thermal resistance and high chemical compatibility should be considered when selecting materials.

Saint-Gobain’s adhesive tape products meet the chemical requirements and demands of green transformers’ base materials, bio-based ester oils.

The adhesive formulations of the company’s CHR® 6202 and CHR 6602 tape products have been developed to be compatible with bio-based transformer oils.

Overcoming Common Challenges and Optimizing Performance

Ester oils are more aggressive against plastic materials. Plastics are more likely to degrade upon exposure to ester oils, potentially contaminating the oil. Contaminated oil has reduced electrical insulation capabilities, increasing the likelihood of transformer failure.

Products demonstrating superior compatibility with bio-based oils are vital for green transformer longevity and durability. Preventing premature failure caused by air bubbles is also challenging.

Tape Solutions

Saint-Gobain’s CHR 6202 and CHR 6602 tape products have been specifically engineered to assist customers in mitigating these challenges.

New Materials for Green Transformers

Image Credit: Saint-Gobain Tape Solutions

Benefits and Features of CHR 6602

CHR 6602 is a white paper filament electrical insulating tape comprised of a high-quality acrylic adhesive system and a glass fiber-reinforced paper backing.

It boasts superior tensile strength, adhesion, and dielectric values, ideally suited to the heavy banding and holding applications commonplace within motors, transformers, generators, and motors. It is versatile and compatible with numerous oils, including aggressive natural ester oils.

CHR 6602’s paper backing affords it good impregnability and is useful for absorbing oil. Its porosity also helps to minimize unwanted air voids in transformer winding, improving dielectric performance.

CHR 6602 demonstrates excellent resistance with no visible damage or swell when soaked in ester oils such as Cargill FR3 and synthetic and natural esters. It also performs well in various traditional mineral oils, including naphthenic and paraffinic grades.

Benefits and Features of CHR 6202

CHR 6202 is a clear, glass filament electrical insulation tape of reinforced polyester coated on one side with a high-quality acrylic adhesive system.

Like its 6602 counterparts, this product is ideally suited for applications like electrical transformers’ outer wrapping, coils, and in-ester oil-filled transformers. It is especially suited to applications where prolonged oil exposure necessitates using materials with superior resistance.

Ensuring Transformer Integrity and Longevity

CHR 6602 and CHR 6602 products have been specifically designed for ester oil-filled transformer applications. They offer high tensile strength and excellent adhesion, which is key for holding and securing the insulation layer during coil winding.

Each tape offers good thermal resistance alongside excellent resistance to chemicals, solvents, and natural and synthetic oils. It is formulated with acrylic adhesive, which is widely recognized for its superior adhesion, chemical stability, and long-term thermal capabilities.

Transformers use minimal tape, but tape quality remains central to the transformer’s reliability during its entire working life, often over 20 years.

Ester oil is extremely chemically aggressive, a key factor in the limited development of oil transformers designed to work with more sustainable oils.

Novel adhesives from Saint-Gobain can resist the more commonly used types of ester oils, helping to facilitate the safer, more sustainable operation of oil transformers.

The company’s team can help customers choose the most suitable product for a specific application and provide detailed information on its high-performance electrical insulation tape portfolio.

Acknowledgments

Produced from materials originally authored by Maggie Bieniek from Saint-Gobain Tape Solutions.

This information has been sourced, reviewed and adapted from materials provided by Saint-Gobain Tape Solutions.

For more information on this source, please visit Saint-Gobain Tape Solutions.

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