Pole transformers are installed at the top of utility poles and are designed to decrease high voltage to low voltage. Made to withstand high temperatures, they do not need a radiator. Salt-resistant transformers which use a polymer bushing can be used in salt-affected areas. When an amorphous metal is used as the core material, the no-load loss is 1/3 that of silicon steel sheet and can ensure great cost-effectiveness in areas with light loads or large load fluctuations.