IEC_60034-1Rotating_electrical_machines_part1Rating_and_performance3.pdf

Rotating electrical machines Part 1:Rating and performance Reference number IEC 60034-1:2004(E)INTERNATIONAL STANDARD IEC60034-1 Eleventh edition2004-04 This English-language version is derived from the original bilingual publication by leaving out all French-language pages.Missing page numbers correspond to the French-language pages.Publication numberingAs from 1 January 1997 all IEC publications are issued with a designation in the60000 series.For example,IEC 34-1 is now referred to as IEC 60034-1.Consolidated editionsThe IEC is now publishing consolidated versions of its publications.For example,edition numbers 1.0,1.1 and 1.2 refer,respectively,to the base publication,thebase publication incorporating amendment 1 and the base publication incorporatingamendments 1 and 2.Further information on IEC publicationsThe technical content of IEC publications is kept under constant review by the IEC,thus ensuring that the content reflects current technology.Information relating tothis publication,including its validity,is available in the IEC Catalogue ofpublications(see below)in addition to new editions,amendments and corrigenda.Information on the subjects under consideration and work in progress undertakenby the technical committee which has prepared this publication,as well as the listof publications issued,is also available from the following:IEC Web Site(www.iec.ch)Catalogue of IEC publicationsThe on-line catalogue on the IEC web site(http:/www.iec.ch/searchpub/cur_fut.htm)enables you to search by a variety of criteria including text searches,technicalcommittees and date of publication.On-line information is also available onrecently issued publications,withdrawn and replaced publications,as well ascorrigenda.IEC Just Published This summary of recently issued publications(http:/www.iec.ch/online_news/justpub/jp_entry.htm)is also available by email.Please contact the CustomerService Centre(see below)for further information.Customer Service CentreIf you have any questions regarding this publication or need further assistance,please contact the Customer Service Centre:Email:custserviec.chTel:+41 22 919 02 11Fax:+41 22 919 03 00 Rotating electrical machines Part 1:Rating and performance For price,see current catalogue IEC 2004 Copyright-all rights reserved No part of this publication may be reproduced or utilized in any form or by any means,electronic or mechanical,including photocopying and microfilm,without permission in writing from the publisher.International Electrotechnical Commission,3,rue de Varemb,PO Box 131,CH-1211 Geneva 20,SwitzerlandTelephone:+41 22 919 02 11 Telefax:+41 22 919 03 00 E-mail:inmailiec.ch Web:www.iec.ch INTERNATIONAL STANDARD IEC60034-1 Eleventh edition2004-04 XB Commission Electrotechnique InternationaleInternational Electrotechnical Commission PRICE CODE 60034-1 IEC:2004 3 CONTENTS FOREWORD.9 1 Scope.13 2 Normative references.13 3 Terms and definitions.17 4 Duty.25 4.1 Declaration of duty.25 4.2 Duty types.27 5 Rating.51 5.1 Assignment of rating.51 5.2 Classes of rating.51 5.3 Selection of a class of rating.53 5.4 Allocation of outputs to class of rating.55 5.5 Rated output.55 5.6 Rated voltage.55 5.7 Co-ordination of voltages and outputs.55 5.8 Machines with more than one rating.57 6 Site operating conditions.57 6.1 General.57 6.2 Altitude.57 6.3 Maximum ambient air temperature.57 6.4 Minimum ambient air temperature.57 6.5 Water coolant temperature.59 6.6 Storage and transport.59 6.7 Purity of hydrogen coolant.59 7 Electrical operating conditions.59 7.1 Electrical supply.59 7.2 Form and symmetry of voltages and currents.59 7.3 Voltage and frequency variations during operation.65 7.4 Three-phase a.c.machines operating on unearthed systems.69 7.5 Voltage(peak and gradient)withstand levels.71 8 Thermal performance and tests.71 8.1 Thermal class.71 8.2 Reference coolant.71 8.3 Conditions for thermal tests.73 8.4 Temperature rise of a part of a machine.75 8.5 Methods of measurement of temperature.75 8.6 Determination of winding temperature.77 8.7 Duration of thermal tests.83 8.8 Determination of the thermal equivalent time constant for machines of duty type S9.85 8.9 Measurement of bearing temperature.85 8.10 Limits of temperature and of temperature rise.85 60034-1 IEC:2004 5 9 Other performance and tests.103 9.1 Routine tests.103 9.2 Withstand voltage test.105 9.3 Occasional excess current.109 9.4 Momentary excess torque for motors.111 9.5 Pull-up torque.113 9.6 Safe operating speed of cage induction motors.113 9.7 Overspeed.115 9.8 Short-circuit current for synchronous machines.117 9.9 Short-circuit withstand test for synchronous machines.117 9.10 Commutation test for commutator machines.117 9.11 Total Harmonic Distortion(THD)for synchronous machines.117 10 Rating plates.119 10.1 General.119 10.2 Marking.119 11 Miscellaneous requirements.123 11.1 Protective earthing of machines.123 11.2 Shaft-end key(s).125 12 Tolerances.127 12.1 General.127 13 Electromagnetic compatibility(EMC).131 1