SOUTH AFRICAN NATIONAL STANDARD

Transcription

1 ISBN SOUTH AFRICAN NATIONAL STANDARD Electromagnetic compatibility (EMC) Part 4-30: Testing and measurement techniques Power quality measurement methods This national standard is the identical implementation of, and is adopted with the permission of the International Electrotechnical Commission. Published by SABS Standards Division 1 Dr Lategan Road Groenkloof Private Bag X191 Pretoria 0001 Tel: Fax: SABS

2 Table of changes Change No. Date Scope National foreword This South African standard was approved by National Committee SABS/TC 073, Electromagnetic compatibility, in accordance with procedures of the SABS Standards Division, in compliance with annex 3 of the WTO/TBT agreement. This SANS document was published in March This SANS document IEC corr. 1:2006). supersedes SANS :2003 (edition 1 as modified by This document is referenced in the Regulations of the Independent Communications Authority of South Africa Act, 2000 (Act No. 13 of 2000). Reaffirmed and reprinted in October This document will be reviewed every five years and be reaffirmed, amended, revised or withdrawn. SABS

3 IEC INTERNATIONAL STANDARD NORME INTERNATIONALE BASIC EMC PUBLICATION PUBLICATION FONDAMENTALE EN CEM Electromagnetic compatibility (EMC) Part 4-30: Testing and measurement techniques Power quality measurement methods Compatibilité électromagnétique (CEM) Partie 4-30: Techniques d essai et de mesure Méthodes de mesure de la qualité de l alimentation

4 IEC:2008 CONTENTS FOREWORD...4 INTRODUCTION Scope Normative references Terms and definitions General Classes of measurement methods Organization of the measurements Electrical values to be measured Measurement aggregation over time intervals Measurement aggregation algorithm Requirements /180 cycle aggregation min aggregation hour aggregation Real time clock (RTC) uncertainty Flagging concept Power quality parameters Power frequency Measurement method Measurement uncertainty and measuring range Measurement evaluation Aggregation Magnitude of the supply voltage Measurement method Measurement uncertainty and measuring range Measurement evaluation Aggregation Flicker Measurement method Measurement uncertainty and measuring range Measurement evaluation Aggregation Supply voltage dips and swells Measurement method Detection and evaluation of a voltage dip Detection and evaluation of a voltage swell Calculation of a sliding reference voltage Measurement uncertainty and measuring range Aggregation Voltage interruptions Measurement method Evaluation of a voltage interruption Measurement uncertainty and measuring range Aggregation Transient voltages... 25

5 IEC: Supply voltage unbalance Measurement method Measurement uncertainty and measuring range Measurement evaluation Aggregation Voltage harmonics Measurement method Measurement uncertainty and measuring range Measurement evaluation Aggregation Voltage interharmonics Measurement method Measurement uncertainty and measuring range Measurement evaluation Aggregation Mains signalling voltage on the supply voltage Measurement method Measurement uncertainty and measuring range Measurement evaluation Aggregation Rapid Voltage Changes (RVC) Measurement of underdeviation and overdeviation parameters Measurement method Measurement uncertainty and measuring range Aggregation Range of influence quantities and steady-state verification Range of influence quantities Steady-state performance verification Annex A (informative) Power quality measurements Issues and guidelines Annex B (informative) Power quality measurement Guidance for applications Annex C (informative) Guidance on instruments Bibliography Figure 1 Measurement chain Figure 2 Synchronization of aggregation intervals for Class A Figure 3 Synchronization of aggregation intervals for class S: parameters for which gaps are not permitted Figure 4 Synchronization of aggregation intervals for class S: parameters for which gaps are permitted (see 4.5.2) Figure 5 Example of supply voltage unbalance uncertainty Figure A.1 Frequency spectrum of typical representative transient test waveforms Table 1 Influence quantity range Table 2 Uncertainty steady-state verification for class A and class S Table C.1 Summary of requirements... 60