Non-Linear Load & Alternator Derating
Harmonic currents heat alternator windings. Turn a non-linear load share into the kVA a set really has to carry.
Result
Formula
Calculation logicWhat to check
- Measured current THD at the generator terminals
- Manufacturer alternator derating curve for the harmonic spectrum
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Map the application and hours to the ISO 8528 rating to specify and the NEC article that governs the installation.
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Altitude and ambient temperature reduce every rating. Convert your site conditions into usable kW and the nameplate you must order.
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Generator Load Factor Check
See how loaded a set will actually run, and whether a light load puts it into wet-stacking territory.
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Keep the assumptions with the result.
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