What formula is used to find the Apparent Power of a 3 Phase system?

In a three-phase system, the formula used to find the Apparent Power is S = V * I, where V is the line voltage and I is the line current. This formula is crucial because it takes into account the total amount of power flowing in a three-phase circuit, which is represented as apparent power (S). Apparent power encompasses both the real power (active power) and the reactive power in the system, providing a complete view of the power utilized.

The use of line voltage (Vl) and line current (Il) is important in three-phase systems because it allows for the correct calculation of power in the system when all three phases are considered. Apparent power is typically measured in volt-amperes (VA) and is essential for understanding the capacity of electrical systems.

The other formulas presented do not specifically represent the correct approach for calculating apparent power in a three-phase context. For instance, finding apparent power using phase voltage and current applies to single-phase calculations rather than three-phase specific calculations. Meanwhile, formulas involving real power (P) and reactive power (Q) focus more on the components of power rather than providing a direct measure of apparent power.