Home » News » Product Characteristics of Diamond Dotted Paper

Insulation paper, commonly known as diamond dotted paper, diamond paper, abbreviated as DDP in English, is an insulating material made of cable paper as a substrate and a special modified epoxy resin coated on a cable paper in a diamond shape. .

Product characteristics: The coil has a very good ability to resist axial short-circuit stress; improving the resistance of the coil to heat and force is beneficial to the life and reliability of the transformer;

Product use: Suitable for the inter-turn insulation of oil-immersed power transformers and the interlayer insulation of distribution voltage coils.

Dispensing paper is widely used in interlayer insulation and inter-turn insulation of oil-immersed power transformers. When used, the coating begins to melt at a certain temperature during the drying process of the coil, resulting in adhesion. The curing begins again as the temperature rises, so that adjacent layers of the winding are reliably bonded to a fixed unit. The adhesive strength of the epoxy resin is sufficient to prevent displacement of the layers of the winding during short circuit, thereby ensuring long-term mechanical and electrical properties of the insulation structure.

Since the resin coating of the diamond dotted paper is punctiform, the immersion of the oil and the discharge of gas in the insulating material are ensured, and corona and partial discharge are effectively avoided, thereby ensuring the safety and reliability of the insulating structure. It can also be used as anti-corona material for cable shielding and high-voltage tapping and electrical appliances.

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