International Standards and Conformity Assessment for all electrical, electronic and related technologies

SC 77A

EMC - Low frequency phenomena

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WG 9 Convenor & Members


Mr Alex McEachern
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Mr Arun AggarwalIN
Mrs Mihaela AlbuRO
Mr Julio Barros GuadalupeES
Mr Roger BergeronCA
Mr Jean-Pierre BraunCH
Jonny CarlssonSE
Mrs Irina CiorneiRO
Mr Luigi D'OrazioIT
Mr Emmanuel De JaegerBE
Mr Stéphane DoBE
Mr Olivier DucarmeBE
Mr Jérôme DucaudFR
Mr Lothar FickertAT
Mr Walter GebhartAT
Mr Franck GruffazFR
Mr Philippe JuhelFR
Mr Sang-ik LeeKR
Mr Francois LevesqueCA
Mr Ian McMichaelAU
Mr Markus MeinkeDE
Mr Julio J. MeleroES
Mr Antonio Moreno MuñozES
Mr Christian NoceIT
Mr Ivo NovakovicHR
Mr Thomas O'ConnellIE
Mr Michael O'DwyerIE
Mr Francisco José PazosES
Mr B Subba RaoIN
Mr Daniel ReimhultSE
Paulo F. RibeiroUS
Mr Daniel SabinUS
Mr Karsten SchröderDE
Mr Michael SchwenkeDE
Mr Helge SeljesethNO
Mr David SweetingAU
Mr Patrick TochonFR
Mr Max UlrichCH
Mr Giovanni ValtortaIT
Mr Wouter VancoetsemBE

Title & Task

WG 9

Power Quality measurement methods


Define measurement parameters of Power Quality and provide standard measurement methods for characterizing these parameters. Provide guidance on safe application and reliable interpretation of these measurements.

The definition of measurement methods is necessary in order to obtain reproducible and comparable results of measurements conducted by different organisations using different instruments.

These measurements are generally performed with field instruments for two principal purposes:

a) obtain statistical information on Power Quality at selected points of the networks,

b) resolve perceived or observed incompatibility at the point of use between equipment power needs and available power of the system.

The standard measurement methods are specified in normative body, while the guidance on application and interpretation are provided in informative annexes.