Line voltage · line current · power factor
Three-phase power
Inputs
User-entered RMS line-to-line voltage; voltage drop, supply quality, and system configuration are not derived.
User-entered RMS line current; load balance, conductor sizing, and protection are not derived.
User-entered scalar power factor from zero through one; harmonics and power-quality effects are not modeled.
Results
Literal three-phase apparent power
24.942
kVALiteral three-phase real power
21.2
Declared line-to-line voltage
480
Declared line current
30
S = √3·VLL·I; P = S·PF
A first-pass number, not a code check, certification, or approval. Read the method and its limits below. What this is and is not.
Nearby: Ohm's law
Method
Formula, when it applies, and when it does not
Apply line-to-line voltage, line current, and power factor to three-phase apparent and real power arithmetic without electrical-system design decisions.
S = √3·VLL·I; P = S·PF
When
- Balanced three-phase scalar relation
- Declared line current and power factor
- No harmonic or phase-balance model
Don’t
- This applies only the balanced scalar three-phase relation to user-declared line voltage, line current, and power factor. It does not determine phase balance, harmonics, conductor or breaker size, protection, voltage drop, grounding, available fault current, power-quality compliance, capacity, safety, suitability, or approval.