Question 15Electricity & Electronics - Assistant Engineer

The correct answer is B) step-down transformer with dual voltage secondary. The transformer diagram shown in figure "B" of the illustration EL-0082 represents a step-down transformer with a dual voltage secondary. This type of transformer steps down the primary voltage to two different secondary voltages, which is commonly used to provide power at different voltage levels within the same system. The other answer choices are incorrect because: A) an open delta transformer has a different configuration, C) a Scott-connected transformer is used to create a three-phase system from a single-phase source, and D) an autotransformer has a different winding arrangement compared to the diagram shown.