What is the difference between oil-immersed and dry-type transformers?

Transformers are electrical devices that we frequently use in our daily lives. They can convert high voltage into low voltage to meet the needs of our electrical appliances. Transformers can be classified into two types based on their insulation materials: oil-immersed and dry-type. So, what are the differences between them?

Transformers are electrical devices that we often use in our lives. They can convert high voltage into low voltage to meet our needs for using electrical appliances. Transformers can be divided into two types: oil-immersed and dry, depending on their insulation materials. So, what are the differences between them?

Firstly, oil-immersed transformers use liquid insulation, which means that the transformer coils and core are immersed in insulating oil. This improves insulation strength and prevents discharge accidents. In contrast, dry transformers use air insulation and special insulating materials to protect the coils and core. Compared to this, oil-immersed transformers have more stable and reliable insulation performance.

Secondly, oil-immersed transformers can dissipate heat better because insulating oil has excellent heat dissipation properties. Dry transformers, on the other hand, need to use cooling devices like fans for heat dissipation. This also makes oil-immersed transformers suitable for use in harsh environments with high loads and long operating times.

In addition, regarding maintenance and repair, oil-immersed transformers require regular replacement of insulating oil, while dry transformers do not require such operations. This also makes dry transformers more environmentally friendly.

In summary, oil-immersed and dry transformers each have their applicable scenarios. For equipment that requires stable operation under high load for a long time, oil-immersed transformers are more suitable; while for equipment with light loads and higher maintenance and environmental protection requirements, dry transformers can be chosen.

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