What is the difference between dry-type transformers and oil-immersed transformers?
05-20 2025 | By:
Transformers are vital equipment in power systems, mainly used for voltage conversion and power transmission. In power equipment, dry-type transformers and oil-immersed transformers are two common types, and there are some significant differences between them in design and application. Understanding these differences is essential to choosing the right type of transformer.
First, there is a clear difference between Epoxy Resin Transformer and Oil Immersed Type Transformer in insulation materials. Dry-type transformers use solid insulation materials such as epoxy resin or other plastics, which can effectively prevent electrical short circuits and breakdown. Because their insulation materials do not contain liquids, dry-type transformers have better fire resistance and low maintenance requirements. In addition, dry type epoxy resin transformer can be used in indoor environments and are more adaptable to the environment because they are not easily affected by external climate changes.
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In contrast, Oil Filled Transformer use mineral oil as the insulating medium and coolant. The design of oil-immersed transformers allows it to work at higher loads because the oil has a better cooling effect. Oil-immersed transformers usually need to be installed in a dedicated transformer room to prevent oil leakage from polluting the environment, and the quality and level of the oil need to be checked regularly. Although oil-immersed transformers are better than Epoxy Resin Cast Dry-type Transformer in cooling effect, their installation and maintenance are relatively complicated.
In addition, dry-type transformers and oil-immersed transformers also differ in durability and safety. Due to the characteristics of their solid insulation materials, dry-type transformers are relatively less likely to have fire and explosion accidents, and their maintenance costs are low. Oil-immersed distribution transformer, on the other hand, need to pay special attention to fire prevention and oil leakage during operation. Although their cooling effect is good, oil leakage will have a certain impact on the environment.
In terms of application scenarios, dry-type transformers are suitable for places with high requirements for environmental conditions, such as commercial buildings, hospitals, schools, etc. Due to their oil-free design, they are more advantageous in places with small spaces or where fire risks need to be avoided. Oil-immersed transformers are suitable for places with high cooling requirements, such as industrial areas, large power transmission stations, etc.
In general, choosing a dry-type transformer or an oil-immersed transformer depends on the specific use requirements and environmental conditions. Understanding the difference between these two transformers can help make more reasonable choices in different application scenarios. Whether it is a dry-type or oil-immersed transformer, reasonable maintenance and operation can ensure its long-term stable operation and meet the needs of the power system.
1600kVA dry-type transformer
ZTELEC Electric Technology (Zhengzhou) Co., Ltd. focuses on the field of power transmission and distribution equipment
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Covering dry-type transformers, oil-immersed transformers, box-type substations and high and low voltage switchgear and other products, serving power transmission and industrial distribution scenarios.
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Including photovoltaic equipment, distribution switch control equipment
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ZTELEC Electric Technology (Zhengzhou) Co., Ltd. has deep technical accumulation in the field of power transmission and distribution equipment, and can provide high-reliability products and customized services. It is recommended to give priority to the transformer series and ODM capabilities, and match its fast delivery advantages with project requirements. You can contact directly through the official website https://www.hnztelec.com/
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