Owning Palette: Power Quality VIs

Requires: Electrical Power Toolkit. This topic might not match its corresponding palette in LabVIEW depending on your operating system, licensed product(s), and target.

Use the Utility VIs to perform connection conversion between Delta and Wye, perform AC/DC coupling, and set triggers on input data.

Palette ObjectDescription
AC DC CouplingEliminates the DC component of voltage waveforms, current waveforms, or waveforms that contain both voltage and current. This VI supports measuring single-line and multiple-line systems.
D to Y ConversionConverts line voltages to phase voltages. This VI calculates an approximate value for the phase voltage in an unbalanced system because the neutral point is placed at the center of the gravity of the line voltages triangle. When calculating phase voltage values, this VI places the neutral point at the center of gravity of the line voltage triangle, which are the characteristics of a balanced three-phase electrical power system. Thus the phase voltage values this VI returns are approximate values for unbalanced system. You must use this VI before performing power measurement, one-cycle power measurement, and signaling measurement, if the input wiring is line voltage. This VI supports measuring single-line and multiple-line systems.
Trigger DetectorDetects crossing of limits for the measurement that you specify and returns triggers if occur. This VI supports measuring single-line and multiple-line systems except the DBL instance. Use the DBL instance to measure one channel on one line at one time.
Y to D ConversionConverts phase voltages to line voltages. You must manually select the polymorphic instance you want to use. This VI supports measuring single-line and multiple-line systems.
Zero CrossingCalculates the zero crossing indexes for voltage waveforms, current waveforms, or waveforms that contain both voltage and current. Zero crossing is the instantaneous point at which the voltage or current turns from positive to negative or from negative to positive. This VI supports measuring single-line and multiple-line systems.