1、 IEC 60027-7Edition 1.0 2010-05INTERNATIONAL STANDARD NORME INTERNATIONALELetter symbols to be used in electrical technology Part 7: Power generation, transmission, and distribution Symboles littraux utiliser en lectrotechnique Partie 7: Production, transport et distribution de lnergie lectrique IEC
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16、 Service clients ou contactez-nous: Email: csciec.ch Tl.: +41 22 919 02 11 Fax: +41 22 919 03 00 IEC 60027-7Edition 1.0 2010-05INTERNATIONAL STANDARD NORME INTERNATIONALELetter symbols to be used in electrical technology Part 7: Power generation, transmission, and distribution Symboles littraux util
17、iser en lectrotechnique Partie 7: Production, transport et distribution de lnergie lectrique INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE UICS 01.060 PRICE CODECODE PRIXISBN 978-2-88910-921-0 Registered trademark of the International Electrotechnical Commissio
18、n Marque dpose de la Commission Electrotechnique Internationale 2 60027-7 IEC:2010 CONTENTS FOREWORD.3 1 Scope.5 2 Normative references .5 3 Letter symbols for AC, three-phase AC, and other network quantities.7 4 Letter symbols for space and time 17 5 Letter symbols for numerical values and ratios o
19、f quantities .20 6 Subscripts and superscripts24 6.1 Subscripts for natural quantities and components in three-phase AC systems.24 6.2 Subscripts for operating conditions25 6.3 Subscripts for electrical equipment25 6.4 Subscripts for locations, reference points, and fault locations27 6.5 Superscript
20、s 28 6.6 Multiple subscripts and their succession28 Bibliography29 60027-7 IEC:2010 3 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ LETTER SYMBOLS TO BE USED IN ELECTRICAL TECHNOLOGY Part 7: Power generation, transmission, and distribution FOREWORD 1) The International Electrotechnical Commission (IEC
21、) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and in addition
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24、ditions determined by agreement between the two organizations. 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international consensus of opinion on the relevant subjects since each technical committee has representation from all interested IEC Na
25、tional Committees. 3) IEC Publications have the form of recommendations for international use and are accepted by IEC National Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC Publications is accurate, IEC cannot be held responsible for the
26、way in which they are used or for any misinterpretation by any end user. 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications transparently to the maximum extent possible in their national and regional publications. Any divergence between any I
27、EC Publication and the corresponding national or regional publication shall be clearly indicated in the latter. 5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity assessment services and, in some areas, access to IEC marks of conformity.
28、 IEC is not responsible for any services carried out by independent certification bodies. 6) All users should ensure that they have the latest edition of this publication. 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and members of
29、its technical committees and IEC National Committees for any personal injury, property damage or other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any o
30、ther IEC Publications. 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is indispensable for the correct application of this publication. 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be t
31、he subject of patent rights. IEC shall not be held responsible for identifying any or all such patent rights. International Standard IEC 60027-7 has been prepared by IEC technical committee 25: Quantities and units. The text of this standard is based on the following documents: CDV Report on voting
32、25/391/CDV 25/406/RVC Full information on the voting for the approval of this standard can be found in the report on voting indicated in the above table. This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. 4 60027-7 IEC:2010 A list of all parts of the IEC 60027 serie
33、s, under the general title Letter symbols to be used in electrical technology can be found on the IEC website. The committee has decided that the contents of this publication will remain unchanged until the stability date indicated on the IEC web site under “http:/webstore.iec.ch“ in the data relate
34、d to the specific publication. At this date, the publication will be reconfirmed, withdrawn, replaced by a revised edition, or amended. 60027-7 IEC:2010 5 LETTER SYMBOLS TO BE USED IN ELECTRICAL TECHNOLOGY Part 7: Power generation, transmission, and distribution 1 Scope This part of IEC 60027 is app
35、licable to generation, transmission, and distribution of electric energy. It gives names and letter symbols for quantities and units. In addition, rules for multiple subscripts and their succession are given. This part of IEC 60027 is an addition to IEC 60027-1. Therefore letter symbols already give
36、n in IEC 60027-1 are repeated only if they have a special meaning in the field of power generation, transmission, and distribution or if they are used in this field with special subscripts. Guidance on the use of capital and lower case letters, is given in IEC 60027-1, 2.1, and guidance on the repre
37、sentation of complex quantities,is given in IEC 60027-1, 1.6. Therefore in many cases only U is given instead of U, UU = or u. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For u
38、ndated references, the latest edition of the referenced document (including any amendments) applies. IEC 60027-1:1992, Letter symbols to be used in electrical technology Part 1: General Amendment 1:1997 Amendment 2:2005 IEC 60027-2:2005, Letter symbols to be used in electrical technology Part 2: Tel
39、ecom-munications and electronics IEC 60038:2009, IEC standard voltages IEC 60050-121:1998, International Electrotechnical Vocabulary Part 121: Electromagne-tism Amendment 1 (2002) IEC 60050-131:2002, International Electrotechnical Vocabulary Part 131: Circuit theory Amendment 1 (2008) IEC 60050-141:
40、2004, International Electrotechnical Vocabulary Part 141: Polyphase systems and circuits IEC 60050-151:2001, International Electrotechnical Vocabulary Part 151: Electrical and magnetic devices IEC 60050-195:1998, International Electrotechnical Vocabulary Part 195: Earthing and protection against ele
41、ctric shock Amendment 1 (1998) 6 60027-7 IEC:2010 IEC 60050-411:1996, International Electrotechnical Vocabulary Chapter 411: Rotating machines Amendment 1 (2007) IEC 60050-421:1990, International Electrotechnical Vocabulary Chapter 421: Power trans-formers and reactors IEC 60050-441:1984, Internatio
42、nal Electrotechnical Vocabulary Chapter 441: Switchgear, controlgear and fuses Amendment 1 (2000) IEC 60050-442:1998, International Electrotechnical Vocabulary Part 442: Electrical accessories IEC 60050-448:1995, International Electrotechnical Vocabulary Chapter 448: Power system protection IEC 6005
43、0-466:1990, International Electrotechnical Vocabulary Chapter 466: Overhead lines IEC 60050-601:1985, International Electrotechnical Vocabulary Chapter 601: Generation, transmission and distribution of electricity General Amendment 1 (1998) IEC 60050-603:1986, International Electrotechnical Vocabula
44、ry Chapter 603: Generation, transmission and distribution of electricity Power system planning and management Amendment 1 (1998) IEC 60050-604:1987, International Electrotechnical Vocabulary Chapter 604: Generation, transmission and distribution of electricity Operation Amendment 1 (1998) IEC 60050-
45、811:1991, International Electrotechnical Vocabulary Chapter 811: Electric traction IEC 60909-0:2001, Short-circuit currents in three-phase AC systems Part 0: Calculation of currents IEC/TR 60909-1:2002, Short-circuit currents in three-phase AC systems Part 1: Factors for the calculation of short-cir
46、cuit currents according to IEC 60909-0 IEC/TR 60909-2:2008, Short-circuit currents in three-phase AC systems Part 2: Data of electrical equipment for short-circuit current calculations IEC 60909-3:2003, Short-circuit currents in three-phase AC systems Part 3:Currents during two separate simultaneous
47、 line-to-earth short circuits and partial short-circuit currents flowing through earth IEC 62428:2008, Electric power engineering Modal components in three-phase a.c. systems Quantities and transformations IEC 80000-6:2008, Quantities and units Part 6: Electromagnetism 60027-7 IEC:2010 7 3 Letter sy
48、mbols for AC,three-phase AC,and other network quantities Quantities Units Unit, coherentwiththe SIItemnumber IEV and/or IECnumber NameofquantityChief symbolReserve symbolRemarks NameSymbolRemarks 101 line-to-earth capacitance ofa line CLiCLiEi= 1,2,3 in three-phase ACnetworksfaradF 102 line-to-line
49、capacitance ofa line CLiLkCLiki, k= 1,2,3 withi kin three-phase ACnetworksfaradF 103 131-14-29 60027-2 hybridmatrixH Namesand symbolsfor the elementsare given in IEC 60027-2.one,ohm,siemens1,S,104 electriccurrentI The generalsymbolIisused in case ofthree-phase ACnetworksifthe threecurrentsare equalornearlyequal.ampere A105 441-17-06 441-17-07 60
