Engineering calculator
Harmonic distortion (THD) check
Voltage THD from individual harmonic levels, compared with a planning limit.
Inputs
Results
- Voltage THD
- 4.11%
- Result
- Within entered limit
THD = √(Σ Vh²) / V1 × 100
Assumptions
- Only the five listed orders are summed
- The limit is set by you — e.g. from the DNSP connection agreement or AS/NZS 61000.3.6 planning levels
Limitations
- Steady-state screening only; does not assess individual-order limits or customer allocation
References: AS/NZS 61000.3.6 · IEEE 519
Provided for general information. Gridlinks Solutions accepts no liability for decisions made using this calculator without independent engineering verification.
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