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 Michael Schwenke
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Mrs Mihaela Marilena AlbuRO
Mr Muhammad AliUS
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 Philippe JUHELFR
Mrs Mi Sung KimKR
Mr Francois LevesqueCA
Mr Ian McMichaelAU
Mr Markus MeinkeDE
Mr Julio J. MeleroES
Mr Christian MesterCH
Mr Antonio Moreno MuñozES
Mr Thomas NaefCH
Mr Christian NoceIT
Mr Ivo NovakovicHR
Mr Michael O'DwyerIE
Mr Francisco José PazosES
Mr B Subba RaoIN
Paulo F. RibeiroUS
Mr Daniel SabinUS
Mr Karsten SchröderDE
Mr Helge SeljesethNO
Mr David SweetingAU
Mr Henk Ter HarmselNL
Mr Mathieu TessierCA
Mr Patrick TochonFR
Mr David TuckeyCA
Mr Max Josef UlrichCH
Mr Giovanni ValtortaIT
Mr Wouter VancoetsemBE
Mr Firuz ZareAU

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.