What does the calculation of power factor involve in a three-phase system?

The calculation of power factor in a three-phase system involves the measurement of power, voltage, and current. Power factor is defined as the ratio of real power (measured in watts) to apparent power (measured in volt-amperes).

In a three-phase system, real power reflects the actual work being done, while apparent power is the product of the total voltage and current in the system. To accurately compute the power factor, one must have information about both the voltage applied across the system and the current flowing through the conductors. This enables the calculation of both the real and apparent power, allowing for the determination of the power factor.

Power factor is essential for understanding system efficiency and helps in identifying how well electrical power is being converted into useful work output.

The other options do not encompass the full requirements for calculating power factor in a three-phase system. Voltage alone, current alone, or power and time are not sufficient without considering the interrelationship between power, voltage, and current.