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Three-Phase Transformer Current Calculator
Enter apparent power and line-to-line voltage to estimate rated three-phase line current. Use the result as an RFQ input, not as a protection, cable, or transformer-sizing decision.
I = (kVA × 1,000) ÷ (√3 × V)
Estimated rated line current
The calculation assumes a balanced three-phase system and uses apparent power. Harmonics, overload duty, derating, impedance, protection coordination, cable ampacity, and local code requirements require project-specific engineering review.
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