Transformer insulation paper purchasing guide

Transformer Type and Size: Determine the specific type and size of the transformer you are dealing with. Different transformers (e.g., distribution, power, or specialty transformers) may require different types of insulation paper.
Operating Conditions: Consider the operating temperature, humidity levels, and environmental conditions where the transformer will be used. These factors will influence the type of insulation paper you need.

Paper-Based Insulation: Typically made from cellulose (e.g., kraft paper), it is widely used for its good insulation properties and cost-effectiveness. Suitable for most standard transformers.
Composite Insulation: Includes combinations of paper with other materials like polyester or resin. Offers enhanced properties such as better thermal stability or moisture resistance.
Pressboard: A thicker, rigid type of insulation paper used in high-voltage applications for added strength and protection.

Dielectric Strength: Indicates the paper's ability to resist electrical breakdown. Higher dielectric strength is crucial for high-voltage transformers.
Thermal Rating: Check the maximum temperature the insulation paper can withstand without degradation. Ensure it matches or exceeds the operating temperature of your transformer.
Moisture Resistance: Evaluate the paper’s resistance to moisture absorption, which can affect its insulation performance. Consider moisture-resistant or hydrophobic options for humid environments.
Thickness and Density: Ensure the paper’s thickness and density meet the requirements of your transformer design for adequate insulation and structural support.

Compliance with Standards: Ensure the insulation paper complies with relevant industry standards and certifications (e.g., IEC, ASTM). This guarantees quality and reliability.
Manufacturer Reputation: Purchase from reputable manufacturers known for producing high-quality insulation materials. Check reviews, certifications, and product guarantees.