IEC_61000-3-3.PDF

INTERNATIONALSTANDARDIEC61000-3-3First edition1994-12 IEC 1994Copyright-all rights reservedNo part of this publication may be reproduced or utilized in any form or by any means,electronic ormechanical,including photocopying and microfilm,without permission in writing from the publisher.International Electrotechnical Commission 3,rue de Varemb Geneva,SwitzerlandTelefax:+41 22 919 0300Electromagnetic compatibility(EMC)Part 3:Limits Section 3:Limitation of voltage fluctuationsand flicker in low-voltage supply systemsfor equipment with rated current 16 ACompatibilit lectromagntique(CEM)Partie 3:Limites Section 3:Limitation des fluctuations de tension et du flickerdans les rseaux basse tension pour les quipementsayant un courant appel 16 AReference numberIEC 61000-3-3:1994(E)IEC web site http:/www.iec.che-mail:inmailiec.chNumberingAs from the 1st January 1997 all IEC publications are issued with a designation inthe 60000 series.Consolidated publicationsConsolidated versions of some IEC publications including amendments areavailable.For example,edition numbers 1.0,1.1 and 1.2 refer,respectively,to thebase publication,the base publication incorporating amendment 1 and the basepublication incorporating amendments 1 and 2.Validity of this publicationThe technical content of IEC publications is kept under constant review by the IEC,thus ensuring that the content reflects current technology.Information relating to the date of the reconfirmation of the publication is availablein the IEC catalogue.Information on the revision work,the issue of revised editions and amendments maybe obtained from IEC National Committees and from the following IEC sources:IEC BulletinIEC YearbookOn-line access*Catalogue of IEC publicationsPublished yearly with regular updates(On-line access)*Terminology,graphical and letter symbolsFor general terminology,readers are referred to IEC 60050:InternationalElectrotechnical Vocabulary(IEV).For graphical symbols,and letter symbols and signs approved by the IEC forgeneral use,readers are referred to publications IEC 60027:Letter symbols to beused in electrical technology,IEC 60417:Graphical symbols for use on equipment.Index,survey and compilation of the single sheets and IEC 60617:Graphicalsymbols for diagrams.*See web site address on title page.1000-3-3 IEC:1994(E)3 CONTENTSPageFOREWORD.5INTRODUCTION.6Clause1 Scope.72 Normative references.73 Definitions.83.1R.M.S.voltage shape,U(t).83.2Voltage change characteristic,U(t).83.3Maximum voltage change,Umax.83.4Steady-state voltage change,Uc.83.5Voltage fluctuation.83.6Flicker.83.7Short-term flicker indicator,Pst.83.8Long-term flicker indicator,Plt.93.9Flickermeter.93.10 Flicker impression time,tf.94 Assessment of voltage fluctuations and flicker.94.1Assessment of a relative voltage change,d.94.2Assessment of the short-term flicker value,Pst.94.2.1 Flickermeter.104.2.2 Simulation method.104.2.3 Analytical method.104.2.3.1 Description of the analytical method.104.2.3.2 Shape factor.114.2.4 Use of Pst=1 curve.114.3Assessment of long-term flicker value,Plt.115 Limits.116 Test conditions.126.1 General.126.2 Measurement accuracy.126.3 Test supply voltage.136.4 Reference impedance.136.5 Observation period.136.6 General test conditions.141000-3-3 IEC:1994(E)4 FiguresPage1Reference network for single-phase and three-phase supplies derived froma three-phase,four-wire supply.152Histogram evaluation of U(t).163Relative voltage change characteristic.164Curve for Pst=1 for rectangular equidistant voltage changes.175Shape factors F for double-step and ramp-voltage characteristics.176Shape factors F for rectangular and triangular voltage characteristics.187Shape factors F for motor-start voltage characteristics havingvarious front times.18AnnexAApplication of limits and type test conditions for specific equipment.191000-3-3 IEC:1994(E)5 INTERNATIONAL ELECTROTECHNICAL COMMISSION_ELECTROMAGNETIC COMPATIBILITY(EMC)Part 3:Limits Section 3:Limitation of voltage fluctuations andflicker in low-voltage supply systems for equipmentwith rated current 16 AFOREWORD1)The IEC(International Electrotechnical Commission)is a worldwide organization for standardizationcomprising all national electrotechnical committees(IEC National Committees).The object of the IEC is topromote international cooperation on all questions concerning standardization in the electrical andelectronic fields.To this end and in addition to other activities,the IEC publishes International Standards.Their preparation is entrusted to technical committees;any IEC National Committee interested inthe subject dealt with may participate in this preparatory work.International,governmental andnon-governmental organizations liaising with the IEC also participate in this preparation.The IECcollaborates closely with the International Organization for Standardization(ISO)in accordance withconditions determined by agreement between the two organizations.2)The formal decisions or agreements of the IEC on technical matters,prep