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Overview of functions Harmonic measurements Quality indicators Micrologic H control units can quantify and evaluate the harmonic distortion of current and voltage waves using the quality indicators listed below: b measurement of the fundamental signal b phase displacement of the fundamental signals b harmonic distortion THD and thd b cos ϕ b power factor b K factor b distortion power b distortion factor b crest factor b amplitude spectrum of even and odd harmonics up to order 31 b displacement spectrum with respect to V1N of even and odd harmonics up to order 31. These indicators are the indispensable tools used to determine any required corrective action. Access to quality indicators The quality indicators may be accessed on the Micrologic H screen and/or via the communication module. Quality indicator Measurement of the fundamental Phase displacement of the fundamental Harmonic distortion THD and thd Cos ϕ Power factor K factor Distortion power Distortion factor Crest factor Amplitude spectrum of odd harmonics up to order 31 Amplitude spectrum of even harmonics up to order 31 Displacement spectrum ith respect to V1N of even and odd harmonics up to order 31 36 On the Micrologic H screen Via the communication module b b - b b b - b b b b b b b b b - b - b 04443728AA - 01/2009