Transformer insulation pressboard is a vital insulating material in transformers. The following is a detailed introduction to it:
Transformer insulation pressboard, usually referred to as insulation pressboard, is a general term for insulation pressboard for the electrical industry. It is mainly used to make insulating components in power equipment such as power transformers, reactors, mutual inductors, such as material cylinders, screens, pads, stays, end rings, etc. These components play the role of isolation, protection and support in the transformer to ensure that the transformer can operate normally and safely.
Insulation performance: Insulation pressboard has extremely high resistivity, which can effectively isolate high-voltage windings and low-voltage windings, prevent currents from interfering with each other, and ensure the normal operation of the transformer.
Mechanical strength: Insulation pressboard has high mechanical strength and can withstand certain pressure and tension to ensure that it will not be damaged by external forces during the operation of the transformer.
Heat resistance: Insulation pressboard has good heat resistance, can maintain stable insulation performance in high temperature environments, and will not reduce the insulation effect due to temperature increases.
Durability: Insulation pressboard has a long service life, can maintain stable performance during long-term use, and will not lose insulation effect due to aging.
The production process of insulating paperboard mainly includes the steps of raw material preparation, coating preparation, paper impregnation, pre-drying, drying, cutting and packaging. Among them, the raw materials are usually unbleached sulfate wood pulp or special paper impregnated with phenolic resin, which have high mechanical strength and electrical insulation properties. The coating is mainly composed of phenolic resin, solvent and other additives, which are used to improve the insulation performance and durability of insulating paperboard.
In transformers, insulating paperboard is often used in the following parts:
Isolation between high-voltage winding and low-voltage winding: The high-voltage winding and the low-voltage winding are completely isolated by insulating paperboard to prevent the current from crossing the isolation layer and ensure the normal operation of the transformer.
Protection of components inside the transformer: Insulating paperboard can protect the components inside the transformer from the influence of the external environment, such as moisture, dust, impurities, etc., and extend the service life of the transformer.
Heat dissipation function: Insulating paperboard can effectively dissipate the heat generated inside the transformer, ensure the stability of the internal temperature of the transformer, and prevent the accelerated aging of the insulating material and the weakening of the insulation capacity due to excessive temperature.
In summary, transformer insulation pressboard is an indispensable insulation material in transformers, with excellent insulation performance, mechanical strength, heat resistance and durability. In the manufacturing and operation of transformers, insulation pressboard plays a vital role.
