AUWiring

Power quality and backup charts

Voltage unbalance, harmonic distortion and generator relationship charts.

  • 2 charts
  • Australia

Power quality and backup charts project basis

Voltage unbalance, harmonic distortion and generator relationship charts. These charts help confirm formula relationships, variable meanings and input basis before a calculator run or technical review.

More

Confirm the nominal 230/400 V a.c. or project-specific voltage basis, 50 Hz context where applicable, phase arrangement, metric units, manufacturer information, DNSP or authority conditions and current project documents before applying a result.

Use the relationship beside the matching calculator input set, measurement record or worksheet. Do not treat a chart as equipment selection or installation approval.

Records covered

  • Voltage unbalance formulasMeasurement formula chart for average voltage, maximum deviation and percent voltage unbalance.Measurement chart · 2026-07-13
  • Harmonic THD formulasFormula chart for total harmonic distortion from fundamental and harmonic RMS magnitudes.Measurement chart · 2026-07-13

Review before applying

Power quality and backup charts explain formula and measurement relationships. Use them with the matching calculator, entered project values and current Australian review context before carrying a relationship into a record.

Recheck the selected chart whenever the supply arrangement, equipment data, route length, tariff basis, measurement method or project document set changes.