AUWiring

Power quality calculators

Summarise voltage events, voltage unbalance, harmonic distortion, resonance screens and measurement logs from recorded site values.

  • 7 calculators
  • Australian workflow
  • 230/400 V a.c. context

Power quality calculators project basis

Summarise voltage events, voltage unbalance, harmonic distortion, resonance screens and measurement logs from recorded site values. These calculators support Australian design, estimating, installation and verification preparation. Keep the circuit, equipment, route, supply arrangement and source data with the result before it is used in a project record.

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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.

Check entered values, supply arrangement, cable or equipment data, product limits, DNSP or authority conditions and review limits before using the result.

Records covered

  • Voltage unbalanceCalculate average-deviation voltage unbalance from one measured three-voltage set. Inputs: Record reference, measurement set, three voltages, nominal voltage and entered review threshold. Output: Measurement worksheet requiring instrument, DNSP, equipment and project review before formal conclusions.
  • Voltage sagCalculate event voltage sag from entered pre-event and event voltage values. Inputs: Event reference, pre-event voltage, event voltage, duration and entered review threshold. Output: Event worksheet requiring measurement, equipment and project context before wider interpretation.
  • Harmonic current TDDCalculate total demand distortion from harmonic current RMS values and demand current. Inputs: Record reference, demand current, harmonic current rows and entered review threshold. Output: Current-harmonic worksheet that keeps the demand-current basis visible.
  • Capacitor resonance screenScreen entered capacitance and inductance for resonant frequency and harmonic order. Inputs: Record reference, capacitance, inductance, system frequency, review harmonic and band. Output: Screening worksheet requiring supplier, engineering or study review before product decisions.
  • Neutral harmonic currentEstimate neutral triplen harmonic current from entered phase harmonic current rows. Inputs: Record reference, triplen harmonic order, three phase harmonic currents and entered review threshold. Output: Triplen harmonic worksheet that stays separate from ordinary load-imbalance neutral current.
  • Measurement logSummarise entered voltage, current or harmonic measurement rows. Inputs: Log reference, timestamped measurement rows, units and entered review threshold. Output: Record-summary worksheet for min, max, average and rows above the user-entered threshold.

Review before applying

Power quality calculator results are preparation records. Keep entered values beside current Australian requirements, DNSP or authority conditions, manufacturer information and project documents before applying a result.

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