Characteristics and advantages of dry type transformer

by changan electric

A dry type transformer is a type of electrical transformer that does not use liquid insulation, such as oil or gas, to cool and insulate the windings. Instead, it uses air as a cooling medium and solid insulation materials, such as epoxy resin, to insulate the windings. Dry type transformers are also known as cast resin transformers, because the coils are cast in a solid epoxy resin material.


Among the various types of transformers available, dry-type transformers are widely utilized due to their numerous advantages, including heightened safety and more. They are commonly used in buildings, industrial plants, and other applications where safety and environmental concerns are important. This article will give you an in-depth introduction to the characteristics and advantages of dry-type transformers.


11kV Three Phase Epoxy Resin Cast Dry Type Power Transformer



What are the main advantages of a dry type transformer?


Self-extinguishing and low fire hazard:

The insulation material used in a dry-type transformer is eco-friendly and designed to self-extinguish in case of a fire. It is also flame retardant, reducing the risk of fire accidents. This feature ensures a higher level of safety compared to other types of transformers. Additionally, dry-type transformers do not produce toxic gases even under the influence of arcing, further enhancing their safety profile. As a result, investing in a separate fire extinguisher is not necessary when using a dry-type transformer.


Zero oil usage:

Unlike other types of transformers, dry-type transformers do not require liquid cooling, eliminating the need for oil or any other liquid. This reduces maintenance costs and the risk of oil leaks, making them more environmentally friendly.


Eco-friendly and safe:

Dry-type transformers do not use oil or other liquids, which means there is no risk of oil leaks or environmental pollution. They are designed to withstand harsh weather conditions and are suitable for heavily polluted areas.


Cost-effective installation and lower load losses:

Dry-type transformers have fewer installation restrictions and do not require special precautions like groundwater protection. They have a long service life of over 20 years with minimal chances of failure, resulting in cost savings.


Low maintenance:

Dry-type transformers require minimal maintenance. As long as they have proper airflow for cooling, there is no need for regular cleaning or liquid testing. However, periodic expert inspections are recommended.



By using dry-type transformers, you contribute to conserving natural resources. They offer energy-efficient operation, utilize recyclable materials (up to 90%), and have a reliable service life of 20+ years.


In summary,

Dry type transformers offer several advantages, including enhanced safety, reduced maintenance, eco-friendliness, and cost-effectiveness. Their self-extinguishing properties, zero oil usage, and sustainable design make them a favorable choice for various applications. Contact a Chang'an dry type transformer manufacturers today to get the best solution for your energy needs!

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