Transformer phenolic resin paper tube

Transformer phenolic resin paper tube is an insulating material designed for electrical equipment such as transformers. The following is a detailed explanation and description of its material, use, and characteristics:

 

Transformer phenolic resin paper tube is mainly composed of two materials: insulating winding paper and phenolic resin. The insulating winding paper is used as the base material, impregnated in phenolic resin, and forms a tubular structure after heating, rolling, pressing, baking and curing. This combination gives the paper tube excellent insulation and heat resistance.

Transformer phenolic resin paper tube is mainly used for insulating structural parts of electrical equipment such as transformers. In transformers, it plays the role of isolating and protecting wires and cables, preventing current leakage and short circuit, and ensuring the normal operation of electrical equipment. In addition, it can also be used in transformer oil and has excellent oil resistance.

High dielectric properties: Transformer phenolic resin paper tube has a high dielectric constant and low dielectric loss, which enables it to provide stable insulation performance in electrical equipment.

Excellent heat resistance: Due to the addition of phenolic resin, the paper tube can maintain stable performance in high temperature environments and is not easy to deform or burn. This enables it to operate stably for a long time in high temperature working environments such as transformers.

Good mechanical strength: Transformer phenolic resin paper tube has high compression, bending and impact resistance, can withstand certain external forces, and protect internal wires or cables from damage.

Good oil resistance: Paper tubes can maintain good insulation performance in transformer oil, and their insulation performance will not be reduced by oil immersion.

Flat surface and smooth inner wall: The surface of the paper tube should be flat, and defects such as delamination, bubbles and edges are not allowed; the inner wall is allowed to have slight wrinkles, bubbles and core mold indentations that do not affect the vertical withstand voltage. This makes it more convenient and reliable during installation and use.

According to relevant standards (such as GB/T5132, JB/T3172, etc.), transformer phenolic resin paper tubes need to meet certain technical requirements during the manufacturing process, including density, water absorption, thermal stability, bending strength, compressive strength, dielectric loss factor, vertical layer withstand voltage and parallel layer withstand voltage. These technical requirements ensure the reliability and safety of paper tubes in electrical equipment.

 

In summary, transformer phenolic resin paper tube is an insulating material with excellent performance and wide application. It plays a vital role in the manufacturing and operation of electrical equipment.