Comparison of True Versus Reactive Power

 Comparison of True Versus Reactive Power

When a  resistive load is connected, no phase shift is occurs between the voltage and current.

The Power that is the  result of the resistive load  performs work in the circuit. This is      known as “true” power, and is measured in watts.

By  comparison, an inductive load causes a 90-degree phase shift between voltage and current.

To calculate the power that results from an inductive load, multiply voltage by current. When either voltage or current is zero, the power is zero. This type of power is known as  “reactive” power. It counteracts the true power in an electrical circuit. It is measured in reactive volt-amperes.
© 2013 Craig Miles, all rights reserved

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