A transformer is an electrical device that increases or decreases ac voltage, and has characteristics such as transformation ratio, capacity, and insulation. according to the purpose, it can be divided into power transformers, distribution transformers, special-purpose transformers, etc.; according to the structure, it can be divided into oil-immersed transformers, dry-type transformers, and closed-type transformers. it has a wide range of applications and can be used in power systems, industria

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