When compared to single-phase electrical current, three-phase power

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Three-phase power permits shorter exposures because it provides a smoother and more constant power supply than a single-phase power supply. It also produces 360 pulses per second (60 Hz in the US) which is more frequent than a single-phase power supply. Finally, three-phase power produces less voltage ripple because the power is distributed over three phases, rather than one, resulting in a more stable power supply.

When Compared to Single-Phase Electrical Current, Three-Phase Power