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3-Phase AC Power —
Interactive Educational Tool
☾ Theme
Explore rotating phasors, time-domain waveforms, and the balance of three-phase systems
Phasor Diagram
rotating vectors
Phase A (Va)
Phase B (Vb)
Phase C (Vc)
Sum (Va+Vb+Vc)
Waveform Display
time domain
Va(t)
Vb(t)
Vc(t)
Sum
Va
(t) = Vm · sin(ωt)
= 0.0 V
Vb
(t) = Vm · sin(ωt − 120°)
= 0.0 V
Vc
(t) = Vm · sin(ωt − 240°)
= 0.0 V
Sum
= 0.00 V
θ = 0° (0.00 rad)
Phase A (Va)
0.0 V
Phase B (Vb)
0.0 V
Phase C (Vc)
0.0 V
Sum (Va+Vb+Vc)
0.00 V
Neutral current = 0 A
❚❚
Pause
▶
Step
↻
Reset
Speed:
1.0x
Position:
0°
Angle:
0°
Phase A amplitude:
100%
Phase B shift:
0°
Reset imbalance
Educational Insight
Balanced System
Three phasors separated by 120° form a balanced system. The vectors rotate counterclockwise; their sum is always zero.