What is the coil voltage in a 120/208-volt, 3Ø, 4-W supply system?

In a 120/208-volt, three-phase, four-wire supply system, the coil voltage refers to the voltage across a coil in a transformer or similar device. The system is typically configured with three phases, and the voltages can vary depending on the connections.

The phase voltage in a three-phase system can be calculated by taking the line voltage and dividing it by the square root of three (approximately 1.732). For a 208-volt line voltage, this means the phase voltage would be calculated as follows:

Coil Voltage (Phase Voltage) = Line Voltage ÷ √3

In this case, since the line voltage is 208 volts, the calculation yields:

Coil Voltage = 208 volts ÷ 1.732 ≈ 120 Volts.

Thus, the formula provided is relevant because it accurately reflects how to derive coil or phase voltage from the line voltage in a three-phase system. This systematic approach helps in correctly determining the operational parameters for electrical systems, ensuring they operate effectively and efficiently in various applications.

Recognizing the importance of the {B} choice allows for a deeper understanding of how voltages relate in three-phase systems, which is essential knowledge for working with such configurations in electrical installations and systems