What is the primary coil rating for transformers with nameplate voltages of 4800/8320?

The primary coil rating for transformers with nameplate voltages of 4800/8320 indicates the voltage levels at which the transformer operates. The first number, 4800 volts, represents the primary side voltage when connected to a specific system, while the second number, 8320 volts, indicates the higher voltage option or the maximum voltage rating of the transformer.

Transformers are designed to step voltages up or down based on the primary and secondary windings. In this case, the lower voltage rating (4800 volts) is generally the operating voltage for the primary side, making it the correct answer as it primarily denotes the transformer’s function in practical applications.

The other choices either denote incorrect voltage levels or do not correspond with the given nameplate ratings, which means they do not accurately represent the primary coil rating of the transformers in question. Understanding voltage ratings is crucial when working with transformers, as it ensures proper operation within specified electrical systems.