1 Scope
This part of 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 fundamentalpower factor, which is due to the phase difference between the voltage
and current at the fundamental frequency, and the non-fundamentalpower factor, which is related to the distortion
of the voltage and/or current. This Technical Report is applicable only to single-phase
systems.
This Technical Report provides definitions for the three following cases:
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• the general case where the voltage and current are both distorted (Clause 5),
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• the case where the voltage is assumed to be sinusoidal and the current is only distorted with harmonic components (Clause 6),
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• the particular case where the voltage and current are both sinusoidal (Annex A).
Annex B gives information on the fundamentalactive factor, which is used to describe the
behaviour of a piece of equipment as a load or a generator.