Advantages of Phasor and Vector Oriented Testing

Auditorium

In the past few years, the industry has evolved towards more test equipment options for grounding applications which can measure the magnitudes and angles between injected currents and split network currents, and between injected currents and network resulting voltages. Also, the quality of the injected signals and the precision and level of filtering of the measured signals has increased greatly. This is a moment in which the traditional testing methods used over the past century can be improved and ground grids and soils can be tested in a state that represents better their real performance. This paper compares scalar vs phasor and vector oriented testing for ground grid analysis. Benefits and disadvantages are listed for both approaches for the following tests: four pin for soil resistivity, three pin for ground grid resistance (impedance), and measurement of current split.

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