Millivolt-Ampere Reactive (mVAR) is a lesser-known unit often used in electrical engineering to measure reactive power in smaller-scale applications. Unlike active power, which does the actual work, reactive power is essential for maintaining voltage stability and transferring energy in AC circuits. Reactive power exists due to the phase difference between current and voltage in inductive or capacitive loads, causing energy to oscillate between source and load rather than being consumed.
The “milli” prefix denotes one-thousandth, making 1 mVAR equal to 0.001 VARs. Understanding and managing reactive power at this scale is crucial in sensitive electronics or communication systems, where even minor fluctuations can affect performance. It highlights the delicate balance within power systems that engineers must maintain for efficiency and reliability.
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