Dry-type transformers are electrical equipment where the core and windings are cooled by air rather than insulating oil. They are particularly suitable for applications with stringent fire safety requirements and limited space, such as high-rise buildings, subways, or industrial facilities. Utilizing epoxy resin or Nomex paper insulation, they offer safety and reliability while maintaining stable operation in high-temperature environments (e.g., 55°C) and demonstrating strong resistance to electromagnetic interference.