FORMULAE

 DC Equations   Voltage = Current x Resistance (V=IR)   Power Real = Voltage x Current (P=VI)     Single Phase Equations   Power Apparent =        Power Real 2 + Power Reactive 2     Power Factor = Power Real / Power Apparent     Three Phase Equations   Power Apparent = Voltage x Current x 1.732   Power Real = Voltage x Current x Power Factor x 1.732   Horsepower = Power Real x Efficiency                                    746   AC Speed Equations   AC Synchronous Speed = Frequency x 120                                        Number of Poles   Percent Slip = Synchronous Speed – Full Load Speed x 100                                     Synchronous Speed   Motor Application   Horsepower = Torque x Speed                               5250   Acceleration Torque = Inertia x ΔSpeed                                    308 x ΔTime Units for equations on this page:   Voltage: Volts (V) Current: Amperes (A) Resistance: Ohms (Ω) Frequency: Hertz (hz) Rotational Speed: RPM Power Real: Watts (W) Power Apparent: VA Power Reactive: VARS Power Mech: Horsepower (hp) Torque: Foot-pounds (lb-ft) Inertia: (Foot-pounds)2 (lb-ft)2 Time: Seconds (s)

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