Mathematics · Electrical Phase Calculations
In a balanced 3-phase system, the sum of the instantaneous voltages is zero (VR + VY + VB = 0). If at a particular instant, the voltages of the R and B phases are +30 V and -90 V, respectively, what is the instantaneous voltage of the Y phase?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1+120 V
- 2-120 V
- 3-60 V
- 4+60 V✓
Correct answer
+60 V
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