Dry Transformer

Henan GNEE Electric Co., Ltd. is one of the most reliable manufacturers and suppliers of dry transformer in China. If you're going to buy customized dry transformer made in China, welcome to get quotation from our factory. Quality products and reasonable price are available.

A dry transformer is an electrical transformer that uses air or gas as an insulation medium instead of liquid. It is also sometimes referred to as an air-core transformer. Dry transformers are very different from their liquid or oil-filled counterparts.

For one, dry transformers are more efficient and durable than oil-filled transformers because there is no liquid to leak or catch fire. Additionally, dry transformers are easier and cheaper to maintain because there is no need to check or change the oil periodically.

Table of dry-type transformer normal impedance ranges

Dry-type transformers are static devices that use air as a cooling medium. As the device heats up during the conversion from high voltage to low voltage, the air and DuPont Nomex insulation used in the transformer construction work together to dissipate the heat.

Dry-type transformers are typically used in indoor applications where the device is not exposed to water or other liquids. However, they are also used in locations where there is a higher risk of fire, such as chemical plants or refineries.

Better Overload Capacity
Dry type transformers can handle overloads better than oil type transformers. This is because the windings in dry type transformers are cooled by the surrounding air, which prevents overheating.

Low Partial Discharge
Partial discharge is a phenomenon that causes the insulation of transformers to degrade. There are tiny gaps or voids in the insulation, which allow a small amount of current to discharge.

This eventually leads to transformer failure. On the other hand, partial discharge is less likely to occur in dry type transformers because the windings are surrounded by solid material without any gaps or voids.

Can be Installed Outdoors
Another advantage of dry type transformers is that they can be installed outdoors. This is because they do not rely on a liquid insulating medium, so there is no risk of leakage. Therefore, you can install a dry type transformer outdoors in an IP-45 enclosure without any problems.

Zero Fire Risk
Dry type transformers do not pose a fire hazard due to the use of non-flammable air as winding insulation. On the contrary, oil type transformers pose a fire hazard because the oil used for insulation is flammable.

Non-Hygroscopic
Dry type transformers are also not hygroscopic. This means that they do not absorb moisture from the air, which can lead to corrosion. This is why dry-type transformers are ideal for outdoor applications, as they can withstand harsh weather conditions better than oil-based transformers.

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