Diamond Dotted Paper Widely Used in Transformers

The rhombic dispensing paper is an insulating material which is coated with special modified epoxy resin on the electrical insulating paper. Widely used in interlayer insulation and tantalum insulation of oil-immersed power transformers. In use, the coating layer begins to melt at a certain temperature during the drying of the coil, resulting in adhesion. Curing begins again as the temperature rises, allowing adjacent layers of the winding to be reliably bonded into a fixed unit. The adhesive strength of the epoxy resin is sufficient to prevent the displacement of the layers of the winding during the short circuit, thereby ensuring the long-term mechanical and electrical properties of the insulation structure.

Since the resin coating of the rhombic dispensing 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.