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IEC 61000, which is a Technical Report, provides definitions of various electrical power quantities and the relationship between them under non-sinusoidal conditions, in order to give clear information on both components in the power factor: the fundamental power factor, which is due to the phase difference between the voltage and current at the fundamental frequency, and the non-fundamental power factor, which is related to the distortion of the voltage and/or current. This Technical Report is applicable only to singlephase systems. This Technical Report provides definitions for the three following cases: - the general case where the voltage and current are both distorted (Clause 5), - the case where the voltage is assumed to be sinusoidal and the current is only distorted with harmonic components (Clause 6), - the particular case where the voltage and current are both sinusoidal (Annex A). Annex B gives information on the fundamental active factor, which is used to describe the behaviour of a piece of equipment as a load or a generator.
||Electromagnetic compatibility (EMC) - Part 1-7: General - Power factor in single-phase systems under non-sinusoidal conditions