Composite enclosure for dry-type transformer coils

I. Product Introduction
The composite shroud for dry-type transformer coils is made of special insulating materials. The core consists of a polyester film (or PET film) coated with a special heat-resistant/high-temperature adhesive, laminated with multiple layers of polyester fiber non-woven fabric (or PET non-woven fabric), and then surface-treated with special resin and high-pressure pressed. The interlayer bonding is tight, eliminating the risk of delamination. Standard colors are red and brown, with some custom colors, such as yellow, available. Common widths are 1000mm, 1100mm, 1200mm, and 1300mm, with thicknesses typically 0.5mm, 0.83mm, and 0.9mm. All sizes can be customized to meet the production needs of different specifications of dry-type transformers.

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Description
Applications
Parameter

II. Performance Characteristics
1. Excellent Heat Resistance: Possesses reliable heat resistance, mostly F-grade heat resistance, with a long-term operating temperature up to 155℃. It can adapt to the temperature rise environment during dry-type transformer operation and is not prone to aging or deformation.
2. Strong insulation and withstand voltage: High dielectric strength, with a breakdown voltage exceeding 30kV in the unbent state, providing excellent high-voltage resistance and effectively isolating coil potential differences to prevent insulation failures such as short circuits.
3. Stable mechanical properties: High tensile strength, ≥350N/10mm in both longitudinal and transverse directions when unbent; strong tear resistance, able to withstand tensile forces and electrodynamic impacts during coil winding and installation, suitable for automated winding processes.
4. Good environmental adaptability: Extremely low shrinkage and moisture absorption, maintaining stable performance even in complex environments such as high humidity, reducing the probability of insulation failures caused by moisture, eliminating the need for additional moisture-proofing treatment.
5. Excellent composite properties: Formed using a high-voltage pressing process, the multi-layered structure is tightly bonded, with no delamination, resulting in a long service life and ensuring long-term stable transformer operation.

About

Zhejiang Yuanda Fiberglass Mesh Co.,ltd.

Zhejiang Yuanda Fiberglass Mesh Co., Ltd. was founded in 2000. It is a technology-oriented manufacturing enterprise focusing on the new materials field, specializing in the research and development and production of composite reinforcing materials, insulating materials, and related intelligent equipment. Committed to providing professional and reliable products and services to customers worldwide. The company is located in the Yangtze River Delta economic Circle of China, close to Ningbo Port and Shanghai Port. The unique geographical location has brought convenience to the company's import and export business. The company covers an area of nearly 33,000 square meters and has modern standard workshops.
The three core business segments
1. Composite material fiber bars and fiber bar mesh sheets (GFRP), as well as supporting production equipment.
2. Special interlayer insulating materials for power transformers and motors.
Iii. Alkali-resistant fiberglass mesh fabric and alkali-resistant emulsion for construction.

For the past 25 years, Zhejiang Yuanda Fiberglass Mesh Co., Ltd. has been deeply engaged in the field of new materials, deepening technological innovation and industrial collaboration, continuously expanding the application scope of its products, and has won wide recognition from customers. In the future, we will be committed to building a leading domestic supplier of composite new materials and injecting continuous impetus into the high-quality development of the industry.

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