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Vacuum epoxy cast transformers are widely used in power systems due to their excellent electrical insulation and mechanical strength. Insulation design is a crucial factor for the performance and reliability of these transformers.

The insulation system of a vacuum epoxy cast transformer includes solid insulation and liquid insulation. Solid insulation includes insulating materials such as mica, glass fiber, and epoxy resin. These materials are used to insulate the conductor, core, and winding of the transformer. Liquid insulation includes transformer oil, which is used to insulate and cool the transformer.

The insulation design of a vacuum epoxy cast transformer must consider the electrical, thermal, and mechanical stresses that the transformer will experience during operation. The insulation system should be able to withstand these stresses without degrading or failing.

One of the most important factors in insulation design is the selection of insulating materials. The materials should have high dielectric strength, good thermal stability, and low moisture absorption. Mica and glass fiber are commonly used in vacuum epoxy cast transformers due to their excellent dielectric properties and mechanical strength. Epoxy resin is used to bond the insulating materials together and to provide additional mechanical strength.

Another important factor in insulation design is the arrangement of the insulation materials. The insulation system should be designed to provide adequate clearance and creepage distances between the conductors and other parts of the transformer. This is important to prevent electrical breakdown and arcing. In addition to solid insulation, the liquid insulation system must also be designed to provide adequate insulation and cooling. Transformer oil is used to insulate and cool the transformer. The oil must be carefully selected and tested to ensure that it has the required dielectric strength, thermal stability, and low moisture content.

In conclusion, the insulation design of a vacuum epoxy cast transformer is a complex process that requires careful consideration of electrical, thermal, and mechanical stresses. The selection and arrangement of insulating materials are critical factors in the performance and reliability of these transformers. Adequate testing and maintenance are also essential to ensure that the insulation system remains effective over the life of the transformer.

LuShan, est. 1975,  is a Chinese professional manufacturer specializing in power transformers and reactors for 48 years. Leading products are single-phase transformer, three-phase transformers, DC inductors, AC reactors, filtering reactor, expoxy resin high-voltage transformer and intermediate, high-frequency products. Our transformers and reactors are widely used in 10 application areas: rapid transit, construction machinery, renewable energy, intelligent manufacturing, medical equipment, coal mine explosion prevention , excitation system, vacuum sintering, central air conditioning.

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