THREE-PHASE CIRCUITS
Basic AC Power
Summary
Three-phase circuits are summarized below.
Three-Phase Circuits Summary
Three-phase power systems are used in the industry because:
-
Three-phase circuits weigh less than single-phase circuits of the same
power rating.
-
They have a wide range of voltages and can be used for single-phase
loads.
-
Three-phase equipment is smaller in size, weighs less, and is more
efficient than single-phase equipment.
Unbalanced three-phase circuits are indicated by abnormally high currents in one
or more of the phases.
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