![oil-immersed transformer](https://www.kunji-electric.com/wp-content/uploads/2023/11/柱上油浸式变压器-scaled.jpg)
Why can oil-immersed transformers be installed outdoors while dry-type transformers are generally only suitable for indoor installation?
This is because oil-immersed transformers contain transformer oil, which serves as both the insulation material for the transformer core and coils and as the heat