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Can Total Demand Distortion (TDD) be manually calculated?

Total Demand Distortion (TDD) can be calculated by the following two methods.
*Note you will need the Peak Demand Current.

1) If the per phase THD and Fundamental currents are known, the attached calculation can be used.

CM4 THD_TDD calculation.doc


2) If the per phase thd and “true” RMS currents are known, the attached calculation can be used.

CM4 little thd_TDD calculation.doc

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