Voltage Drop Calculator from Transformer kVA
When load current is not known directly, derive current from transformer or load kVA, then apply the normal voltage-drop formula.
voltage drop calculator transformer kva transformer kva voltage drop calculator voltage drop by transformer kva
Three-phase current from kVA
I = kVA * 1000 / (sqrt(3) * V_LL)
Single-phase current from kVA
I = kVA * 1000 / V
Voltage drop shortcut
VD = M * K * I * L / CM
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