如何计算Three Phase
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Analyzes three-phase AC power systems used in industrial applications. Calculates power, current, and relationships between phases.
公式
Line voltage = phase voltage × √3
分步指南
- 1Three sinusoidal voltages 120° apart
- 2Line voltage = phase voltage × √3
- 3Line current = phase current (Y-connection) or √3 × phase current (delta)
- 4Power = √3 × V × I × PF
例题解析
输入
Line voltage 480V
结果
Phase 277V
常见错误注意事项
- ✕Confusing line voltage with phase voltage
- ✕Applying single-phase formulas to three-phase
常见问题
Why is three-phase used in industry?
More efficient power distribution, smaller cables, smoother motors, better line utilization.
What's Y vs. delta connection?
Y (star): common on supply side, neutral available; delta: high voltage, no neutral.
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