Reactive power is measured in what unit?

Reactive power is measured in volt-amps reactive (VAR). This unit is specifically used to describe the power that alternates between supplying and absorbing energy in inductive and capacitive loads, which do not necessarily convert all consumed power into useful work.

In the context of alternating current (AC) circuits, reactive power is generated by inductors and capacitors. While real power, measured in watts, represents actual power used to perform work, reactive power reflects the energy that is temporarily stored in the electrical field of a capacitor or magnetic field of an inductor. This stored energy is critical for maintaining voltage levels in the power system and supports the oscillation of electric and magnetic fields, but does not perform net work.

Understanding reactive power and its measurement in volt-amps reactive is essential for analyzing power systems, especially when considering the efficiency and stability of electrical services. This concept is important for electrical professionals to ensure proper system design and load management.