dry type transformer temperature rise refers to how much the transformer winding or core temperature increases above ambient temperature during operation. It is closely related to load level, cooling method, insulation class, room ventilation, and transformer design quality. If temperature rise is too high, insulation aging may accelerate and service life may be reduced. A properly designed transformer controls heat through optimized winding structure, suitable core material, effective airflow, temperature sensors, and fan-assisted cooling when required. dry type transformer temperature rise should be checked during specification review and factory testing.