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TeachMeFinance.com - explain Reactive power Reactive power The term 'Reactive power' as it applies to the area of energy can be defined as ' The portion of electricity that establishes and sustains the electric and magnetic fields of alternating-current equipment. Reactive power must be supplied to most types of magnetic equipment, such as motors and transformers. Reactive power is provided by generators, synchronous condensers, or electrostatic equipment such as capacitors and directly influences electric system voltage. It is a derived value equal to the vector difference between the apparent power and the real power. It is usually expressed as kilovolt-amperes reactive (kVAR) or megavolt-ampere reactive (MVAR). See Apparent Power, Power, Real Power'. The term 'Reactive power' as it applies to the area of reclamation can be defined as ' The portion of power that is produced by load inductances or capacitances. It is the time average of the instantaneous product of the voltage and current, with current phase shifted 90 degrees. It is expressed as volt-amperes reactive or VARS'. Previous 5 Terms: rDNA RDS reach Reactance Reaction Next 5 Terms: Reactive Power Reactivity Reactor coolant system Reactor core Reactor Oversight Process (ROP) About the author Mark McCracken Author: Mark McCracken is a corporate trainer and author living in Higashi Osaka, Japan. He is the author of thousands of online articles as well as the Business English textbook, "25 Business Skills in English". Copyright © 2005-2011 by Mark McCracken, All Rights Reserved. TeachMeFinance.com is an informational website, and should not be used as a substitute for professional medical, legal or financial advice. Information presented at TeachMeFinance.com is provided on an "AS-IS" basis. Please read the disclaimer for details.