Electrical Exam Term
Three-Phase Power
An AC power supply system using three conductors, each carrying current 120 degrees out of phase with each other, commonly used for commercial and industrial applications.
Detailed Explanation
Three-phase power provides more efficient power delivery for large motors and heavy electrical loads. Common configurations include wye (star) and delta. A wye system provides both line-to-line voltage (e.g., 208V or 480V) and line-to-neutral voltage (120V or 277V). Three-phase motors are smaller, lighter, and more efficient than equivalent single-phase motors.
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Practice QuestionEasy
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