a transformer of which the magnetic circuit and windings are not immersed in an insulating liquid
synonyms: air-cooled transformer; cast-resin transformer; open ventilated transformer; silicon-rubber-insulated dry-type transformer
see also: power transformers
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note: Dry-type transformers are commonly used in indoor installations, renewable energy systems, industrial facilities, and buildings where fire safety, environmental risk, or maintenance access is a concern. They typically range from small distribution transformers to medium power units (up to ~20–30 MVA). They represent a growing share of power and distribution transformers, and are usually produced with copper windings and foils.
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source: https://www.electropedia.org/iev/iev.nsf/display?openform&ievref=421-01-16
standards: IEC 60076-11, UL 1562 or IEEE C57.12.01