What is the output voltage if the secondary windings of a transformer rated 120/240 are connected in series?

When the secondary windings of a transformer rated 120/240 are connected in series, the output voltage is determined by the voltages of each winding. In this case, one winding provides 120 volts and the other provides 240 volts. When these two windings are connected in series, their voltages add together.

Therefore, if you connect the 120-volt winding end-to-end with the 240-volt winding, the total output voltage will be the sum of both: 120 volts + 240 volts, resulting in a total output of 360 volts. However, if you consider just the configuration of the transformer when referring to the combined output, it is usually simpler to refer to the highest available voltage from the secondary, which can be treated simply as 240 volts in the context where they work in standard configurations for certain loads.

While connecting them in series allows for higher voltages to be achieved, the configuration in a standard setup would typically indicate that one could utilize the available 240 volts directly. Therefore, while logically one should consider these connections, the context and typical wiring practices lead to an understanding that it might still commonly reference the higher transformer output as 240 volts for simplicity in this scenario.

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