IEC 61000-2-2:2002 pdf download

IEC 61000-2-2:2002 pdf download.Electromagnetic compatibility (EMC)-Part 2-2: Environment – Compatibility levels for low- frequency conducted disturbances and signallingin public low-voltage power supply systems.
3.1.3
electromagnetic compatibility EMC (abbreviation)
the ability of an equipment or system to function satisfactorily in its electromagnetic environment without introducing intolerable electromagnetic disturbances to anything in that environment
NOTE 1 Electromagnetic compatibility is a condition of the electromagnetic environment such that, for every phenomenon, the disturbance emission level is sufficiently low and immunity levels are sufficiently high so that all devices, equipment and systems operate as intended.
NOTE 2 Electromagnetic compatibility is achieved only if emission and immunity levels are controlled such that the immunity levels of the devices equipment and systems at any location are not exceeded by the disturbance level at that location resulting from the cumulative emissions of all sources and other factors such as circuit impedances. Conventionally, compatibility is said to exist if the probability of the departure from intended performance is sufficiently low. See 61000-2-1 clause 4.
NOTE 3 Where the context requires it, compatibility may be understood to refer to a single disturbance or class of disturbances.
NOTE 4 Electromagnetic compatibility is a term used also to describe the field of study of the adverse electromagnetic effects which devices, equipment and systems undergo from each other or from electromagnetic phenomena.
[1EV 161-01-07, modified]
(electromagnetic) compatibility level
the specified electromagnetic disturbance level used as a reference level in a specified environment for co-ordination in the setting of emission and immunity limits
NOTE By convention, the compatibility level is chosen so that there is only a small probability that it will be exceeded by the actual disturbance level.
[1EV 161-03-10, modified]
3.1.5
planning level
a level of a particular disturbance in a particular environment, adopted as a reference value for the limits to be set for the emissions from large loads and installations, in order to co-ordinate those limits with all the limits adopted for equipment intended to be connected to the power supply system
NOTE The planning level is locally specific, and is adopted by those responsible for planning and operating the power supply network in the relevant area. For further information, see Annex A.
3.1.6
point of common coupling PCC (abbreviation)
the point on a public power supply network, electrically nearest to a particular load, at which other loads are, or could be, connected
[1EV 161-07-15 modified]
3.2 Phenomena related definitions
The definitions below that relate to harmonics are based on the analysis of system voltages or currents by the discrete Fourier transform method (DFT). This is the practical application of the Fourier transform as defined in 1EV 101-13-09. See annex B.
NOTE The Fourier transform of a function of time, whether periodic or non-periodic, is a function in the frequency domain and is referred to as the frequency spectrum of the time function, or simply spectrum. If the time function is periodic, the spectrum is constituted of discrete lines (or components). If the time function is not periodic, the spectrum is a continuous function, indicating components at all frequencies.
Other definitions related to harmonics or interharmonics are given in the 1EV and other standards. Some of those other definitions, although not used in this standard, are discussed in annex B.
3.2.1
fundamental frequency
a frequency in the spectrum obtained from a Fourier transform of a time function, to which all the frequencies of the spectrum are referred. For the purpose of this standard, the fundamental frequency is the same as the power supply frequency
[1EV 101-14-50, modified]
NOTE 1 In the case of a periodic function, the fundamental frequency is generally equal to the frequency of the function itself. (See B.1).
NOTE 2 In case of any remaining risk of ambiguity, the power supply frequency should be referred to the polarity and speed of rotation of the synchronous generator(s) feeding the system.
3.2.2
fundamental component
the component whose frequency is the fundamental frequency
3.2.3
harmonic frequency
a frequency which is an integer multiple of the fundamental frequency. The ratio of the harmonic frequency to the fundamental frequency is the harmonic order (recommended notation: h)
3.2.4
harmonic component
any of the components having a harmonic frequency. Its value is normally expressed as an r.m.s. value
For brevity, such a component may be referred to simply as an harmonic.