In this video we learn how three phase electricity works from the basics. We explain how three phase electricity is generated, how the voltages vary, how to calculate the voltages and vrms, what frequency, hertz and cycle mean and how we get two different voltages from a three phase supply. We look at wye and delta, transformers and generators. We start with a simple single phase AC generator and then add in a second and third phase to under stand its working principle.
Three-phase power provides three alternating currents, with three separate electric services. Each leg of alternating current reaches a maximum voltage, only separated by 1/3 of the time in a full cycle. In other words, the power output of a three-phase power remains to be constant, and it never drops into zero.
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