Meter Information (Info); Power Analysis Values; Total Harmonic Distortion Measurement - Delta DPM-C501L Operating Manual

4.2.10 Meter Information (INFO)

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Model: C501L
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Firmware version: 1XXXX
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Firmware release date: XXXXYYZZ (XXXX: year, YY: month, ZZ: day)

4.3 Power Analysis Values

4.3.1 Total Harmonic Distortion Measurement

The total harmonic distortion (THD) is a measurement of the harmonic distortion and is defined as the ratio
between the power of the harmonic frequencies above the base frequency and the power of the base frequency.
The total harmonic distortions for current and voltage are calculated using the following formulas.
Total Harmonic
Distortion for Current
Total Harmonic
Distortion for Voltage
C h a p t e r 4 O p e r a t i o n
4 - 9
4_