A plastic composite current transformer

Abstract

The invention discloses a plastic compound type current transformer. The plastic compound type current transformer comprises a transformer coil used for penetrating and sleeving a primary circuit, wherein the coil is poured in a transformer main body formed by silicon rubber; a plastic framework used for supporting the coil and capable of satisfying the structural strength of the main body is also arranged in the main body; and a secondary wiring terminal group of the coil is positioned on the outer surface of the main body. According to the plastic compound type current transformer, the transformer is formed by pouring the transformer coil and the plastic framework with the silicon rubber in an integrated manner; the insulativity requirement of the transformer can be satisfied based on the high insulation performance of the silicon rubber, and meanwhile, a better environment protection effect is achieved; compared with plastic and nylon, the silicon rubber is lower in melting point, so that damage to the coil can be avoided; in addition, the plastic framework can support the main body and the coil, so that the problem of high probability of deformation of the silicon rubber is avoided, and the structural strength of the transformer is satisfied; and furthermore, the plastic compound type current transformer is safer and more durable.

Description

technical field [0001] The invention relates to a current transformer, in particular to a plastic composite current transformer. Background technique [0002] Since the invention of epoxy resin in 1904, epoxy resin has been widely used in power electrical products, such as transformers, in my country. However, because epoxy resin is carcinogenic, difficult to degrade, and seriously pollutes the environment, scientists from various countries are actively looking for alternatives. [0003] Since 2010 in our country, many universities and scientific research institutions are looking for products that can replace epoxy resin, such as silicone rubber and plastic current transformers. However, it is limited by the physical properties of plastic and silicone rubber: silicone rubber is soft, and the silicone rubber current transformer will be deformed after being heated or stressed, thus destroying the insulation performance of silicone rubber and causing quality accidents; the ins...

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Problems solved by technology

However, it is limited by the physical properties of plastic and silicone rubber: silicone rubber is soft, and the silicone rubber current transformer will be deformed after being heated or stressed, thus destroying the insulation performance of silicone rubber and causing quality accidents; the insulation performance of plastic is better than that of silicon rubber. The rubber is poor, and its melting point is higher than that of enameled wire, which will directly damage the coil of the transformer. Therefore, it is very difficult to make current transformers above 5kV with plastic.

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