Center Tap Transformer

The difference between a regular transformer and a center tap transformer is that a center tap transformer allows you to tap into half of the voltage. In our example both step-down transformers have a turns ratio of 10:1 which means that the output voltage will be 10 times smaller than the input voltage. 2nd Example: Input voltage = 240V Output voltage = 24V The center tap transformer allows us to tap into half of 24V which is 12V.