By Keyes F.G., Sears F.W.
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Additional resources for Recent Measurements of the Joule Effect for CO 2
Use these buttons to hide/show the voltages and the phasors related to the phase and the line voltages. This graph shows the three-phase Phase and/or Line voltage waveforms in a star connected system This graph shows the threephase Phase and/or Line voltage phasors in a star connected system These equations represent the threephase Phase and Line Voltages. The values are updated depending upon the input values. The format of the equations is v = Vm sin (ωt ± φ) = Vm sin (2πf t ± φ). This figure illustrates the circuit diagram of the three-phase system under investigation.
Com Lab 2 Definitions and Measurement Technques in AC Circuits 12 1 30o 31 12 120o Line voltage 30o 30o 3 23 Phase voltage 23 2 31 Figure 2-10. The three-phase phasor representation. © National Instruments Corporation 2-27 Electrical Circuits and Machines Laboratory with LabVIEW Lab 2 Definitions and Measurement Technques in AC Circuits These knobs and controls can be used to set the amplitude of the phase voltages, the frequency and the phase angle of the threephase AC supply. Use these buttons to hide/show the voltages and the phasors related to the phase and the line voltages.
Phase current, such as i1p , i2p , i3p , i12p , i23p , i31p in Figure 2-8. • Line current, such as i1L , i2L , i3L in Figure 2-8. A three-phase load is called "balanced" when the line voltages are equal and the line currents are equal. In a balanced three-phase system, there is a very simple relationship between the line and phase quantities, which can be obtained from the phasor quantities or the time varying expressions of the voltage and the current. The voltage and current relationships in three-phase AC circuits can be simplified by using the rms values (I and V) of the quantities.