PF = cos φ
= Power Factor
P = 3 1/2 U I cos φ
= 1.732 U I PF (3b)
P = U I (3c)
Reactive power is the imaginary or complex power in a capacitive or inductive load. Reactive power represents an energy exchange between the power source and the reactive loads where no net power is gained or lost. The net average reactive power is zero. Reactive power is stored in and discharged by inductive motors, transformers, solenoids and capacitors. A pure inductor and a pure capacitor do not consume any power since in a half cycle whatever power is received from the source by these components, the same power is returned to the source.
Reactive power should be minimized because it increases the overall current flowing in an electric circuit without providing any work to the load. Increased reactive currents only provides unrecoverable power loss due to power line resistance.
Increased reactive and apparent power will devrease the power factor - PF .
Reactive inductive power is measured in volt-amperes reactive (VAR).
Q = U I sin φ (4a)
φ = phase angle
Q = 3 1/2 U I sin φ
= 1.732 UI sin φ (4b)
Electrical units, amps and electrical wiring, wire gauge and AWG, electrical formulas and motors.
The alternating current In an AC circuit is generated by a sinusoidal voltage source.
Characteristics of all-aluminum conductors (AAC).
Complex numbers are used in alternating current theory and mechanical vector analysis.
Online shareable electric circuit diagram.
Calculate amps, hp and kVA for electrical motors.
One side of a triangle when the opposite angle and two sides are known.
Convert between single phase (120, 240 and 480 Voltage) and three phase (240 and 480 Voltage).
Power equations for single phased electrical systems.
Inductive loads and power factors with electrical three-phase motors.
Electrical 3-phase equations.
Add standard and customized parametric components - like flange beams, lumbers, piping, stairs and more - to your Sketchup model with the Engineering ToolBox - SketchUp Extension - enabled for use with the amazing, fun and free SketchUp Make and SketchUp Pro . Add the Engineering ToolBox extension to your SketchUp from the Sketchup Extension Warehouse!
We don't collect information from our users. Only emails and answers are saved in our archive. Cookies are only used in the browser to improve user experience.
Some of our calculators and applications let you save application data to your local computer. These applications will - due to browser restrictions - send data between your browser and our server. We don't save this data.