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Transformer kVA Calculator — Single & Three-Phase Current

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Calculated result

90.211 A primary · 208.1792 A secondary

75 kVA · 75,000 VA rating basis

2.307692:1 primary:secondary voltage ratio

Balanced three-phase current using line-to-line voltage

Show the working
  1. 1. Primary I = 75,000 ÷ (√3 × 480) = 90.211 A.
  2. 2. Secondary I = 75,000 ÷ (√3 × 208) = 208.1792 A.

Ideal full-load current from kVA and voltage. Real nameplate values and installation requirements remain the controlling reference.

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