Crepe paper is a specialized material widely used in the insulation of transformers, particularly in applications involving oil-cooled and dry-type transformers.
Characteristics of Transformer Crepe Paper
- Material Composition: Transformer crepe paper is typically made from high-purity cellulose, which contributes to its excellent electrical insulation properties.
- Thickness and Flexibility: Crepe paper is available in various thicknesses, ranging from 0.05 mm to 0.125 mm, allowing it to conform to irregular shapes and surfaces within transformers
- The elongation properties can vary significantly, with some products stretching up to 150%
- Electrical Properties: It is designed to withstand high voltages and has low ash content, which helps maintain performance under extreme conditions
Applications
- Transformer Insulation: Used as primary and secondary insulation in oil-filled distribution transformers, power transformers, and instrument transformers
- Lead Wrapping: Suitable for wrapping leads in liquid-immersed transformers due to its conformability and elasticity
- Current Transformers: Employed as insulation in the manufacturing of various types of current transformers
Benefits
- High Compatibility: Many crepe papers are compatible with transformer oils, ensuring longevity and reliability in oil-immersed environments.