What type of transformer is used to derive two 60 volt lines from a 240 volt source?

A center-tapped transformer is designed with a primary coil and a secondary coil that is split into two equal parts. When connected to a 240-volt source, it generates two equal voltage outputs from the center tap. In this case, the transformer takes the 240 volts on the full secondary coil and divides it into two 60-volt lines from the center tap to each end of the secondary coil. This setup allows for the creation of two lines that can be utilized in multiple applications, effectively providing the necessary voltage levels.

In contrast, a step-up transformer would increase voltage, which isn't suitable for deriving lower voltages from a higher source like in this scenario. A step-down transformer would typically convert a higher voltage to a lower one, but without the center tap, it wouldn’t achieve two distinct output voltages from a single secondary. An isolation transformer, on the other hand, is used primarily for safety by isolating the secondary from the primary, without necessarily altering the voltage. Therefore, the center-tapped transformer is the appropriate choice for obtaining two 60-volt lines from a 240-volt source.