Var (Volt-Ampere Reactive)

Volt-Ampere Reactive (VAR) measures the reactive power in an electrical system, which is essential for maintaining voltage levels necessary for equipment operation. Unlike real power (measured in watts) that performs useful work, reactive power supports the magnetic and electric fields in devices like transformers and motors. It oscillates between the source and these devices without doing actual work. Managing reactive power with VARs ensures a stable and efficient power supply, preventing issues like voltage drops or fluctuations. Utilities often charge for excessive reactive power to maintain grid stability.