Question 252Electricity & Electronics - Assistant Engineer

The correct answer is C) 480 volts. The reason is that a three-phase step-down transformer with a turns ratio of 5:1 will transform the 4160 volt three-phase supply down to 480 volts across the secondary terminals A2-B2-C2. This is calculated by taking the primary voltage of 4160 volts and dividing it by the turns ratio of 5, which results in 480 volts on the secondary side. The other answer choices are incorrect because 240 volts is too low, 415 volts is a common European voltage but not used in the US, and 832 volts is too high for a 5:1 step-down transformer.