Transformer rating or capacity depend on the limited of insulation temperature can stand for maximum load.The ratings can be up or down when we reducing a core and copper losses.
To reduce core and cooper losses,we can improved the rate of heat exchange with proper cooling system or by improving quality transformer insulation that can stand for high temperature.
For larger transformer types,we can remove more heat with increased area for efficient cooling and increased volume of oil to absorb more heat to reduce the temperature. read more
