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It's VAR-Y important: understand VAR compensation in a power system.(volt amperes reactive)
Reactive power is one of the most misunderstood concepts in electricity. By definition, real power is the electrical energy that does real work such as providing light in bulbs and turning motor shafts to provide horsepower. Reactive power is a mysterious component of electricity unique to an alternating current (ac) system. Volt amperes reactive (VAR) is the measure of amount of current that makes up the reactive component. The VAR component of an ac electric system flows out of phase with the real component and typically lags the real power flow. VARs are needed to maintain the magnetic fields in transformers and motor windings.
The VAR component of an ac ...
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