THREE-PHASE CIRCUITS Basic AC PowerSummaryThree-phase circuits are summarized below.Three-Phase Circuits SummaryThree-phase power systems are used in the industry because:- Three-phase circuits weigh less than single-phase circuits of the samepower rating.- They have a wide range of voltages and can be used for single-phaseloads.- Three-phase equipment is smaller in size, weighs less, and is moreefficient than single-phase equipment.Unbalanced three-phase circuits are indicated by abnormally high currents in oneor more of the phases.ES-09 Page 26 Rev. 0
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