FieldengElectrical & Power
Single-Phase AC Power
Real, apparent, and reactive power for a single-phase AC load.
Electrical & PowerMechanical & Motion
Real, apparent, and reactive power for a single-phase AC load.
App id: ELEC-08. 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 = Vrms × Irms, P = S × PFInputs
| Name | Unit |
|---|---|
| RMS voltage (camera) | V |
| RMS current (camera) | A |
| Power factor | 1 |
Outputs
| Name | Unit |
|---|---|
| Real power (hero result) | W |
| Apparent power | VA |
| Reactive power | var |
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
- PF represents displacement/distortion well enough for a field estimate.
Provenance
- Sinusoidal steady-state AC. PF is a fraction between 0 and 1.