1、BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06Conventions concerning electric circuitsBS EN IEC 60375:2018EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN IEC 60375 August 2018 ICS 01.060; 01.080.40 Supersedes EN 60375:2003 English Version Conventions concernin
2、g electric circuits (IEC 60375:2018) Conventions concernant les circuits lectriques (IEC 60375:2018) Vereinbarungen fr Stromkreise (IEC 60375:2018) This European Standard was approved by CENELEC on 2018-06-12. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipul
3、ate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CENELEC member. This Europea
4、n Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CENELEC membe
5、rs are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norw
6、ay, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung CEN-CENELEC Management Centre
7、: Rue de la Science 23, B-1040 Brussels 2018 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members. Ref. No. EN IEC 60375:2018 E National forewordThis British Standard is the UK implementation of EN IEC 60375:2018. It is identical to IEC 60375:2018. I
8、t supersedes BS EN 60375:2003, which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee SS/7, General metrology, quantities, units and symbols.A list of organizations represented on this committee can be obtained on request to its secretary.This publication doe
9、s not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2018 Published by BSI Standards Limited 2018ISBN 978 0 580 82758 7ICS 01.080.40; 01.060; 17.220.01Compliance with a British Standard cannot confer
10、 immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 August 2018.Amendments/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS EN IEC 60375:2018EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE N
11、ORM EN IEC 60375 August 2018 ICS 01.060; 01.080.40 Supersedes EN 60375:2003 English Version Conventions concerning electric circuits (IEC 60375:2018) Conventions concernant les circuits lectriques (IEC 60375:2018) Vereinbarungen fr Stromkreise (IEC 60375:2018) This European Standard was approved by
12、CENELEC on 2018-06-12. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national sta
13、ndards may be obtained on application to the CEN-CENELEC Management Centre or to any CENELEC member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CENELEC member into its own langu
14、age and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, Franc
15、e, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. European Committee for Electrotechnical Standardization Comit Europen
16、 de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels 2018 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members. Ref. No. EN IEC 60375:2018 E BS EN IEC
17、 60375:2018EN IEC 60375:2018 2 European foreword The text of document 25/620/FDIS, future edition 3 of IEC 60375, prepared by IEC/TC 25 “Quantities and units, and their letter symbols“ was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as EN IEC 60375:2018. The following dates ar
18、e fixed: latest date by which the document has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2019-03-12 latest date by which the national standards conflicting with the document have to be withdrawn (dow) 2021-06-12 This document superse
19、des EN 60375:2003. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights. Endorsement notice The text of the International Standard IEC 60375:2018 was a
20、pproved by CENELEC as a European Standard without any modification. BS EN IEC 60375:2018EN IEC 60375:2018 3 Annex ZA (normative) Normative references to international publications with their corresponding European publications The following documents are referred to in the text in such a way that so
21、me or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. NOTE 1 Where an International Publication has been modified by common
22、modifications, indicated by (mod), the relevant EN/HD applies. NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available here: www.cenelec.eu. Publication Year Title EN/HD Year IEC 60617-DB - Graphical symbols for diagrams - - BS EN IEC 60375:20
23、18This page deliberately left blank 2 IEC 60375:2018 IEC 2018 CONTENTS FOREWORD . 5 1 Scope 7 2 Normative references 7 3 Terms and definitions 7 4 Orientation of geometrical objects . 15 4.1 Orientation of a curve . 15 4.2 Orientation of a surface. 15 4.3 Arrows perpendicular to the plane of the fig
24、ure . 15 5 Conventions concerning currents . 15 5.1 Physical direction of current 15 5.2 Reference direction of current . 16 5.3 Indication of the reference direction for currents . 16 5.3.1 Indication of the reference direction for currents for a branch 16 5.3.2 Indication of the reference directio
25、n for mesh currents . 16 5.4 Kirchhoff law for nodes . 17 6 Conventions concerning voltages 17 6.1 Physical polarity of voltage . 17 6.2 Reference polarity for a pair of nodes . 18 6.3 Indication of the reference polarity 18 6.3.1 First method 18 6.3.2 Second method 18 6.3.3 Third method . 19 6.4 Ki
26、rchhoff law for meshes . 19 7 Conventions concerning power 20 7.1 Physical direction of power . 20 7.2 Reference direction of power 20 7.3 Indication of the reference direction of power 20 7.4 Combined conventions 20 7.4.1 General . 20 7.4.2 Motor convention . 21 7.4.3 Generator convention 21 8 Conv
27、entions concerning two-port networks 21 9 Conventions concerning sources . 22 9.1 Conventions concerning voltage sources 22 9.1.1 Independent voltage sources . 22 9.1.2 Controlled voltage sources 22 9.2 Conventions concerning current sources . 23 9.2.1 Independent current sources . 23 9.2.2 Controll
28、ed current sources . 23 10 Conventions concerning passive elements. 24 10.1 General conventions . 24 10.2 Resistive elements 24 10.2.1 Resistive two-terminal elements 24 10.2.2 Resistive n-terminal elements 25 10.3 Capacitive elements 26 10.3.1 Capacitive two-terminal elements 26 2 IEC 60375:2018 IE
29、C 2018 CONTENTS FOREWORD . 5 1 Scope 7 2 Normative references 7 3 Terms and definitions 7 4 Orientation of geometrical objects . 15 4.1 Orientation of a curve . 15 4.2 Orientation of a surface. 15 4.3 Arrows perpendicular to the plane of the figure . 15 5 Conventions concerning currents . 15 5.1 Phy
30、sical direction of current 15 5.2 Reference direction of current . 16 5.3 Indication of the reference direction for currents . 16 5.3.1 Indication of the reference direction for currents for a branch 16 5.3.2 Indication of the reference direction for mesh currents . 16 5.4 Kirchhoff law for nodes .
31、17 6 Conventions concerning voltages 17 6.1 Physical polarity of voltage . 17 6.2 Reference polarity for a pair of nodes . 18 6.3 Indication of the reference polarity 18 6.3.1 First method 18 6.3.2 Second method 18 6.3.3 Third method . 19 6.4 Kirchhoff law for meshes . 19 7 Conventions concerning po
32、wer 20 7.1 Physical direction of power . 20 7.2 Reference direction of power 20 7.3 Indication of the reference direction of power 20 7.4 Combined conventions 20 7.4.1 General . 20 7.4.2 Motor convention . 21 7.4.3 Generator convention 21 8 Conventions concerning two-port networks 21 9 Conventions c
33、oncerning sources . 22 9.1 Conventions concerning voltage sources 22 9.1.1 Independent voltage sources . 22 9.1.2 Controlled voltage sources 22 9.2 Conventions concerning current sources . 23 9.2.1 Independent current sources . 23 9.2.2 Controlled current sources . 23 10 Conventions concerning passi
34、ve elements. 24 10.1 General conventions . 24 10.2 Resistive elements 24 10.2.1 Resistive two-terminal elements 24 10.2.2 Resistive n-terminal elements 25 10.3 Capacitive elements 26 10.3.1 Capacitive two-terminal elements 26 BS EN IEC 60375:2018IEC 60375:2018 IEC 2018 3 10.3.2 Capacitive n-terminal
35、 elements 27 10.4 Inductive elements 29 10.4.1 Inductive two-terminal elements . 29 10.4.2 Inductive n-port elements . 30 11 Complex notation . 32 11.1 General . 32 11.2 Conventions concerning complex representation of sinusoidal quantities 32 11.3 Reference direction of a complex current 32 11.4 Re
36、ference polarity for a complex voltage 33 11.5 Complex representation of Ohms law . 34 11.6 Conventions concerning the graphical representation of phasors 35 11.7 Conventions concerning phase differences . 35 11.8 Conventions concerning power . 36 11.8.1 Time-dependent electric power 36 11.8.2 Compl
37、ex power 36 Bibliography 37 Figure 1 Orientation of a curve . 15 Figure 2 Orientation of a surface 15 Figure 3 Indication of the reference direction for a current by an arrow 16 Figure 4 Indication of the reference direction using the node names 16 Figure 5 Indication of the reference direction for
38、mesh currents . 17 Figure 6 Examples of the Kirchhoff law for nodes . 17 Figure 7 Indication of the reference polarity by means of plus and minus signs 18 Figure 8 Simplified indication of the reference polarity by means of plus signs . 18 Figure 9 Indication of the reference polarity by an arrow 18
39、 Figure 10 Indication of the reference polarity using the node names 19 Figure 11 Simplified indication of the reference polarity using the node names 19 Figure 12 Examples of the Kirchhoff law for meshes 20 Figure 13 Indication of the reference direction of power . 20 Figure 14 Examples of motor co
40、nventions 21 Figure 15 Examples of generator conventions 21 Figure 16 A reference convention for a two-port network 22 Figure 17 Graphical representation of an independent voltage source . 22 Figure 18 Graphical representation of a voltage source controlled by a voltage: csuu = 22 Figure 19 Graphica
41、l representation of a voltage source controlled by a current: csiu = . 23 Figure 20 Graphical representation of an independent current source 23 Figure 21 Graphical representation of a current source controlled by a voltage: csui = 24 Figure 22 Graphical representation of a current source controlled
42、 by a current: csii = . 24 Figure 23 Examples of graphical representations of a two-terminal resistive element . 25 BS EN IEC 60375:2018 4 IEC 60375:2018 IEC 2018 Figure 24 Examples of the graphical representation of a four-terminal resistive element. 25 Figure 25 Examples of the graphical represent
43、ation of a two-terminal capacitive element. 26 Figure 26 Examples of the graphical representation of a four-terminal capacitive element. 27 Figure 27 Examples of the graphical representation of a two-terminal inductive element. 29 Figure 28 Examples of the graphical representation of a three-port in
44、ductive element 30 Figure 29 Examples of the Kirchhoff law for nodes in complex notation 33 Figure 30 Examples of the Kirchhoff law for meshes in complex notation . 34 Figure 31 Examples of graphical representation of reference directions and polarities in Ohms law for a complex two-terminal element
45、 35 Figure 32 Graphical representation of a phasor in the complex plane . 35 Figure 33 Graphical representation of phase difference in the complex plane 35 Figure 34 Examples of the reference directions for time-dependent electric power . 36 Figure 35 Examples of the reference directions for the com
46、plex power 36 BS EN IEC 60375:2018IEC 60375:2018 IEC 2018 5 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ CONVENTIONS CONCERNING ELECTRIC CIRCUITS FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical co
47、mmittees (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 to other activities, IEC publishes International Standards, Technical Specifications, Techni
48、cal Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with may participate in this preparatory work. International, government
49、al and non-governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for Standardization (ISO) in accordance with conditions 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 te
