What does a dry-type transformer use for dissipating excess heat produced by the windings?

A dry-type transformer dissipates excess heat produced by the windings using air. The design of a dry-type transformer does not include any liquid cooling mechanisms, such as oil or water, which are typically used in oil-filled transformers. Instead, these transformers rely on natural or forced convection to remove heat generated during operation. The windings of the transformer are usually made of wire that is insulated, and they are designed to allow airflow around them, which helps in carrying away heat.

This reliance on air for cooling is one of the distinguishing features of dry-type transformers, making them suitable for installation in indoor environments and applications where safety and environmental considerations are paramount. Additionally, the absence of oil or other coolants reduces the risk of fire hazards and environmental contamination, reinforcing the advantages of using air as a cooling medium in certain installations.