What are the Advantages and Disadvantages to Using a Fan-Cooled Transformer?


  • Smaller size; fans may add some height but may reduce width and depth
  • Lower costs for larger units (generally above 1000kVA) to add fans instead of conductor and core
  • Potentially better low-load efficiencies



  • Increased complexity and maintenance
  • Increased cost as fan packages may cost more than just adding material in smaller units
  • Additional energy losses and noise when fan motors are operated in higher loads