Step-down transformers convert high voltage power to a low voltage. This makes the power level suitable to the requirements of each device connected to the power systems at household or business locations. Power circuits for homes carry 230V -110V, but some features require as little as 16VA step-up transformer. beside the power station to step-up the voltage and consequently step-down the current reducing electricalTransformers are classified by their function, which is either step up or step down. Step-up transformers increase the voltage of the incoming current, while step-down transformers decrease the incoming current's voltage energy wasted as heat energy in the overhead cables.Step-down transformers convert high voltage power to a low voltage. This makes the power level suitable to the requirements of each device connected to the power systems at household or business locations. Power circuits for homes carry 230V -110V, but some features require as little as 16VA step-up transformer. beside the power station to step-up the voltage and consequently step-down the current reducing electricalTransformers are classified by their function, which is either step up or step down. Step-up transformers increase the voltage of the incoming current, while step-down transformers decrease the incoming current's voltage energy wasted as heat energy in the overhead cables.