Three-Phase AC Power

Balanced three-phase power from line-to-line voltage and line current.

App id: ELEC-09. Reference version 1.0.

How to fill it

Fill the inputs. The tool shows the outputs.

On the tool screen, Calc is the working sheet. Presets stores values you reuse. Reference is the formula, assumptions, and provenance below.

Formula

S = √3 × VLL × I,  P = S × PF

Inputs

Name	Unit
Line-to-line voltage (optional, camera)	`V`
Line-to-neutral voltage (optional)	`V`
Line current (camera)	`A`
Power factor	`1`

Outputs

Name	Unit
Real power (hero result)	`W`
Apparent power	`VA`
Reactive power	`var`
Line-to-line voltage	`V`

Diagnose

Observations are context. They do not pass or fail a structure. See Diagnose.

Screening bands in the app: < 0.80 · 0.80–0.95 · ≥ 0.95.

When	Observation	Severity
`power factor ≥ 0.95`	High power factor	info
`power factor ≥ 0.8`	Moderate power factor	caution
`power factor < 0.8`	Low power factor	warning

Assumptions

Sinusoidal steady-state. Same PF bands as single-phase AC power.

Provenance

Balanced three-phase. Voltage input is line-to-line unless only line-to-neutral is entered.