Which transformer characteristic is essential to match both the system primary voltage and the desired secondary voltage?

• A. Impedance
• B. Tap changer
• C. Windings
• D. Bracket

Answer: (C)

Voltage transformation is determined by how many turns the primary and secondary windings have relative to each other. To match the system’s input voltage and deliver the desired output, the transformer must have windings with the correct turns ratio. The primary winding connects to the system voltage, and the secondary winding’s turns set the voltage it provides. By selecting windings with the proper turns, you configure the nominal secondary voltage for the given primary voltage. Other features like impedance, tap changers, or brackets influence regulation, adjust voltage within limits, or provide support structure, but they don’t define the basic voltage transformation. So, the windings are what establish the required voltage relationship.