What does the hypotenuse of a power triangle represent?

The hypotenuse of a power triangle represents KVA, which stands for kilovolt-amperes. In the context of electrical systems, particularly in alternating current (AC) circuits, the power triangle visually illustrates the relationship between real power (KW), reactive power (KVAR), and apparent power (KVA). The hypotenuse, or the longest side of the triangle, signifies the total or apparent power, which is the vector sum of both the real power and the reactive power.

Real power (measured in KW) is the actual power that performs work in the circuit, while reactive power (measured in KVAR) represents power that oscillates between the source and the load, not performing any useful work but necessary for magnetic fields in inductive loads. Thus, the hypotenuse (KVA) combines the effects of both types of power, showcasing the total power in the system. This understanding is crucial for linemen, as it helps in calculating load requirements and system efficiency.