The Arbiter Systems^®, Inc. Model 930A Three Phase Power Analyzer is an economical alternative to the Model 931A Power System Analyzer when the dc voltage measurement, transducer calibration and timer features are not required.

The Model 930A has the same ac accuracy as the Model 931A with PowerDSA^™ Digital Signal Analysis. Basic accuracy of 0.05 % of reading and 0.05° phase, harmonic analysis, and full three-phase capability are standard.

The Model 930A includes serial communication capability. Combined with the available application software and a laptop computer, is a valuable tool for use in power quality trend monitoring, as well as being a complete diagnostic tool for use in the substation and industrial power environment.

Model 930A measures all of the basic quantities: true-rms voltage and current, frequency and phase angle, as well as power quantities such as watts (W), watthours (Wh), volt-amperes (VA), volt-ampere hours (VAh), volt-amperes reactive (VAR), volt-amperes reactive hours (VARh), and power factor (PF), all with 0.11 % basic accuracy.

Measure harmonics and view the results graphically on the high contrast 240x64 graphic display. The two channels are normalized to Channel 1 fundamental phase, so you can see, for example, the relationship between current waveform distortions and voltage phase.