BRITISH STANDARD Rotating electrical machines — Part 8: Terminal markings and direction of rotation ICS 29.160.01 BS EN 60034-8:2007 +A1:2014 BS EN 60034-8:2007+A1:2014 National foreword This British Standard is the UK implementation of EN 60034-8:2007+A1:2014 It is identical to IEC 60034-8:2007, incorporating amendment 1:2014 It supersedes BS EN 60034-8:2007 which will be withdrawn on 24 April 2017 The UK participation in its preparation was entrusted to Technical Committee PEL/2, Rotating electrical machinery A list of organizations represented on this committee can be obtained on request to its secretary This publication does not purport to include all the necessary provisions of a contract Users are responsible for its correct application Compliance with a British Standard cannot confer immunity from legal obligations This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 August 2007 © The British Standards Institution 2014 Published by BSI Standards Limited 2014 ISBN 978 580 83421 Amendments/corrigenda issued since publication Date Comments 31 July 2014 Implementation of IEC amendment 1:2014 with CENELEC endorsement A1:2014: Clause 6.5 amended EUROPEAN STANDARD EN 60034- $ NORME EUROPÉENNE EUROPÄISCHE NORM May 2014 ICS 29.160 English version Rotating electrical machines Part 8: Terminal markings and direction of rotation (IEC 60034-8:2007) Machines électriques tournantes Partie 8: Marques d'extrémité et sens de rotation (CEI 60034-8:2007) Drehende elektrische Maschinen Teil 8: Anschlussbezeichnungen und Drehsinn (IEC 60034-8:2007) This European Standard was approved by CENELEC on 2007-07-01 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 standards may be obtained on application to the Central Secretariat 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 language and notified to the Central Secretariat has the same status as the official versions CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom CENELEC European Committee for Electrotechnical Standardization Comité Européen de Normalisation Electrotechnique Europäisches Komitee für Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels © 2007 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members Ref No EN 60034-8:2007 E BS EN 60034-8:2007+A1:2014 EN 60034-8:2007+A1:2014 (E) –2– Foreword The text of document 2/1434/FDIS, future edition of IEC 60034-8, prepared by IEC TC 2, Rotating machinery, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 60034-8 on 2007-07-01 This European Standard supersedes EN 60034-8:2002 The main change with respect to EN 60034-8:2002 is listed below: – changed terminal markings for d.c machines in Clause A.4 The following dates were fixed: – latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2008-04-01 – latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2010-07-01 Annex ZA has been added by CENELEC Endorsement notice The text of the International Standard IEC 60034-8:2007 was approved by CENELEC as a European Standard without any modification Foreword to amendment A1 The text of document 2/1732/FDIS, future edition of IEC 60034-8:2007/A1, prepared by IEC/TC "Rotating machinery" was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as EN 60034-8:2007/A1:2014 The following dates are 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) 2015-01-24 • latest date by which the national standards conflicting with the document have to be withdrawn (dow) 2017-04-24 Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights CENELEC [and/or CEN] shall not be held responsible for identifying any or all such patent rights Endorsement notice The text of the International Standard IEC 60034-8:2007/A1:2014 was approved by CENELEC as a European Standard without any modification –3– BS EN 60034-8:2007+A1:2014 EN 60034-8:2007+A1:2014 (E) CONTENTS INTRODUCTION Scope Normative references .7 Terms and definitions .7 Symbols 4.1 General 4.2 DC and single-phase commutator machines 4.3 AC machines without commutator 4.4 Auxiliary devices 10 Direction of rotation 10 Rules for terminal markings 10 6.1 General .10 6.2 Suffixes .11 6.3 Prefixes .12 6.4 Winding identification for categories of machines 12 6.5 Field winding of synchronous machines 13 6.6 DC machines 13 6.7 Relation between terminal markings and direction of rotation 13 6.8 Terminal marking figures .14 Auxiliary terminal marking rules 19 7.1 General .19 7.2 Marking .19 Annex A (normative) Connection diagrams for common applications 22 A.1 General .22 A.2 Three-phase machines 22 A.3 Single-phase asynchronous machines 30 A.4 DC machines .31 Annex ZA (normative) Normative references to international publications with their corresponding European publications 33 Figure – Single three-phase winding, three elements, open connection, six terminals .14 Figure – Single three-phase winding, delta connection, three terminals .15 Figure – Single three-phase winding, internal star connection with neutral conductor, four terminals .15 Figure – Single three-phase winding, two elements per phase, open connection, twelve terminals 15 Figure – Single three-phase winding, four elements per phase, open connection, twenty-four terminals 15 Figure – Single three-phase winding, two elements per phase with four tapping points per element, open connection, thirty-six terminals .16 Figure – Two separate three-phase windings with two independent functions, two elements per phase, open connection, twenty-four terminals 16 Figure – Two elements, internal connection, three terminals .16 Figure – Single three-phase winding, star connection, duplicate terminals for alternate connection, six terminals 16 BS EN 60034-8:2007+A1:2014 EN 60034-8:2007+A1:2014 (E) –4– Figure 10 – Single three-phase winding, star connection, parallel terminals for shared current, six terminals 17 Figure 11 – Three-phase wound-rotor, star connections with neutral conductors, eight terminals 17 Figure 12 – Main and auxiliary winding, two elements 17 Figure 13 – Single-phase auxiliary winding, integrally connected capacitor, one element 17 Figure 14 – Single-phase main winding, integrally connected thermal protector, one element 17 Figure 15 – Six-phase winding, open connection, six elements 17 Figure 16 – Armature winding, one element 18 Figure 17 – Commutating winding, one and two elements 18 Figure 18 – Compensating winding, one and two elements 18 Figure 19 – Series winding, one element, two tappings 18 Figure 20 – Shunt excitation winding, one element 18 Figure 21 – Separately excited excitation winding, one and two elements 18 Figure 22 – Direct-axis auxiliary winding, one element 18 Figure 23 – Quadrature-axis auxiliary winding, one element .18 Figure 24 – Armature winding with commutating and compensating windings, one element 18 Figure 25 – Single-phase, single voltage .19 Figure 26 – Single-phase, dual voltage 19 Figure 27 – Three-phase, single voltage 20 Figure 28 – Three-phase, dual voltage 20 Figure 29 – Two-lead devices (except type R) .20 Figure 30 – Two-lead devices of type R .20 Figure 31 – Three-lead devices of type R 21 Figure 32 – Four-lead devices of type R 21 Figure 33 – Switch connections 21 Figure A.1 – Delta connection .22 Figure A.2 – Star connection – with or without neutral 22 Figure A.3 – Dual voltage, six terminals (1:√3) 22 Figure A.4 – Star-connected, dual voltage, nine terminals (1:2) 23 Figure A.5 – Delta-connected, dual voltage, nine terminals (1:2) 23 Figure A.6 – Star-delta, single voltage, six terminals 23 Figure A.7 – Star-delta, dual voltage, twelve terminals (1:2) .24 Figure A.8 – Part-winding, single voltage, six terminals .24 Figure A.9 – Part-winding, dual voltage, nine terminals (1:2) 25 Figure A.10 – Variable-torque, six terminals 25 Figure A.11 – Variable-torque, dual-voltage (1:√3), nine terminals .26 Figure A.12 – Constant-torque, six terminals .27 Figure A.13 – Constant power, six terminals 27 Figure A.14 – Variable-torque, six terminals 28 Figure A.15 – Constant-torque, seven terminals 28 –5– BS EN 60034-8:2007+A1:2014 EN 60034-8:2007+A1:2014 (E) Figure A.16 – Constant-power, seven terminals 28 Figure A.17 – Example of three-speed, constant torque motor using two separate windings, ten terminals .29 Figure A.18 – Example of three-speed motor using three separate windings, ten terminals 29 Figure A.19 – Example of four-speed, variable-torque motor using two separate windings, twelve terminals 30 Figure A.20 – Split-phase or capacitor-start reversible motor .30 Figure A.21 – Reversible capacitor-start motor with four terminals with externally connected capacitor 31 Figure A.22 – Shunt motor or generator, four terminals 31 Figure A.23 – Compound-motor or generator with compensating and commutating windings, six terminals 31 Figure A.24 – Series-wound motor, two terminals 32 BS EN 60034-8:2007+A1:2014 EN 60034-8:2007+A1:2014 (E) –6– INTRODUCTION The revision of this part of IEC 60034 provides worldwide uniformity in the electrical connections for rotating electrical machines and applies the recommendations of the basic safety publication IEC 60445 in specifying marking requirements These standardized connections will then permit the safe interchange of electric machines with their control and protective devices using standardized terminal markings –7– BS EN 60034-8:2007+A1:2014 EN 60034-8:2007+A1:2014 (E) ROTATING ELECTRICAL MACHINES – Part 8: Terminal markings and direction of rotation Scope This part of IEC 60034 applies to a.c and d.c machines and specifies a) rules for the identification of winding connection points; b) marking of winding terminals; c) direction of rotation; d) relationship between terminal markings and direction of rotation; e) terminal marking of auxiliary devices; f) connection diagrams of machines for common applications Turbine-type synchronous machines are excluded from this standard Normative references The following referenced documents are indispensable for the application 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 IEC 60034-1, Rotating electrical machines – Part 1: Rating and performance IEC 60417-1,Graphical symbols for use on equipment – Part 1: Overview and application IEC 60445, Basic and safety principles for man-machine interface, marking and identification – Identification of equipment terminals and conductor terminations Terms and definitions For the purposes of this document, the terms and definitions given in IEC 60034-1 and the following apply 3.1 terminal marking permanent identification of the external termination of winding leads or auxiliary leads at the disposal of the user for connection of the machine to the supply or apparatus that indicates the function of the termination 3.2 connecting points all current transfer points that are used to permanently interconnect winding or winding element ends internally BS EN 60034-8:2007+A1:2014 EN 60034-8:2007+A1:2014 (E) –8– 3.3 tapping points intermediate connections to a portion of a winding element 3.4 winding leads insulated conductors that make the electrical connection between a winding and its termination 3.5 winding assembly of turns or coils having a defined function in an electrical rotating machine [IEV 411-37-01] 3.6 winding phase one or more winding elements associated with a particular phase 3.7 winding element part of a winding, all the turns or coils in that part being permanently connected together 3.8 separate windings two or more windings, each having a separate function, and not interconnected, used only separately, whether fully or in part 3.9 multi-speed motor motor, which can be operated at any one of two or more definite speeds 3.10 constant power when a multi-speed motor provides approximately constant power over the speed range 3.11 constant torque when a multi-speed motor provides approximately constant torque over the speed range 3.12 variable torque when output torque of a multi-speed motor is proportional to approximately the square of the speeds 3.13 phase sequence order in which the voltages successively reach their maximum positive values between supply conductors BS EN 60034-8:2007+A1:2014 EN 60034-8:2007+A1:2014 (E) 7.2.1.3 – 20 – Three-phase, single voltage ∗∗U ∗∗U ∗∗W ∗∗V ∗∗W ∗∗V L1 L2 L3 Connection L1 L2 L3 Connection ∗∗U ∗∗V ∗∗W Delta ∗∗U ∗∗V ∗∗W Star Figure 27 – Three-phase, single voltage 7.2.1.4 Three-phase, dual voltage ∗∗U1 ∗∗W2 ∗∗U2 ∗∗W2 ∗∗U1 ∗∗V2 ∗∗U2 ∗∗W1 ∗∗W1 ∗∗V1 ∗∗V1 ∗∗V2 Voltage L1 L2 L3 Join together Connection Low ∗∗U1 ∗∗V1 ∗∗W1 [∗∗U1, ∗∗W2]; [∗∗V1, ∗∗U2]; [∗∗W1, ∗∗V2] Delta High ∗∗U1 ∗∗V1 ∗∗W1 [∗∗U2, ∗∗V2, ∗∗W2] Star Figure 28 – Three-phase dual voltage 7.2.2 Thermal and measurement devices Devices CT, PT, R, TB, TC, TN, TM and TP shall be marked and connected in accordance with 7.2.2.1 to 7.2.2.4 where: represents the device ∗∗ indicates the device coding and NOTE For TC devices, the leads are colour coded by the manufacturer to denote polarity NOTE For resistance thermometers, the last character indicates the circuit number NOTE This symbol should be changed according to IEC 60617 for schematic diagrams 7.2.2.1 Two-lead devices of types TB, TC, TM, TN and TP 1∗∗1 1∗∗2 2∗∗1 2∗∗2 Figure 29 – Two-lead devices (except type R) L1 and L2 should be connected according to written instructions or lead colour identification 7.2.2.2 Two-lead devices of type R 1∗∗1 1∗∗2 2∗∗1 2∗∗2 Figure 30 – Two-lead devices of type R BS EN 60034-8:2007+A1:2014 EN 60034-8:2007+A1:2014 (E) – 21 – 7.2.2.3 Three-lead devices of type R 1∗∗1 1∗∗2 2∗∗1 2∗∗2 1∗∗2 2∗∗2 Figure 31 – Three-lead devices of type R 7.2.2.4 Four-lead devices of type R 1∗∗1 1∗∗2 2∗∗1 2∗∗2 1∗∗1 1∗∗2 2∗∗1 2∗∗2 Figure 32 – Four-lead devices of type R 7.2.3 Switches Switches shall be marked and connected as shown in Figure 33 where ∗ denotes the switch number ∗S3 ∗S1 ∗S2 Figure 33 – Switch connections BS EN 60034-8:2007+A1:2014 EN 60034-8:2007+A1:2014 (E) – 22 – Annex A (normative) Connection diagrams for common applications A.1 General Annex A provides connections for terminal markings that shall be used for common applications The layout of figures is for information and may take other forms Applications not shown shall be derived from the rules of Clause NOTE Additions of other common applications may be made to this annex upon request A.2 Three-phase machines A.2.1 Single-speed stator windings A.2.1.1 Single voltage U U N W V W V L1 L2 L3 Connection L1 L2 L3 Connection U V W Delta U V W Star Figure A.1 – Delta connection A.2.1.2 Figure A.2 – Star connection – with or without neutral Dual voltage U1 W2 U1 U2 W1 U2 V2 V1 W2 V2 W1 V1 Voltage L1 L2 L3 Join together Winding connection Low U1 V1 W1 [U1, W2]; [U2, V1]; [V2, W1] Delta High U1 V1 W1 [U2, V2, W2] Star Figure A.3 – Dual voltage, six terminals (1:√ √ 3) BS EN 60034-8:2007+A1:2014 EN 60034-8:2007+A1:2014 (E) – 23 – U1 U3 U2 U3 U1 W2 U2 W1 V2 W3 W3 V3 V3 W2 V1 V2 W1 V1 Voltage L1 L2 L3 Join together Winding connection Low U1 V1 W1 [U1, U3]; [V1, V3]; [W1, W3]; [U2, V2, W2] Parallel star High U1 V1 W1 [U2, U3]; [V2, V3]; [W2, W3] Series star Figure A.4 – Star-connected, dual voltage, nine terminals (1:2) U1 U1 W2 U3 W3 W2 W3 U2 U3 U2 V3 W1 V2 V1 W1 V3 V2 V1 Voltage L1 L2 L3 Join together Winding connection Low U1 V1 W1 [U1, U3, W2]; [V1, V3, U2]; [W1, W3, V2] Parallel delta High U1 V1 W1 [U2, U3]; [V2, V3]; [W2, W3] Series delta Figure A.5 – Delta-connected, dual voltage, nine terminals (1:2) A.2.1.3 Starting windings U1 U2 W2 W1 W2 V2 U1 W1 V1 U2 V2 V1 L1 L2 L3 Join together Winding connection Start U1 V1 W1 [U2, V2, W2] Star Run U1 V1 W1 [U1, W2]; [V1, U2]; [W1, V2] Delta Figure A.6 – Star-delta, single voltage, six terminals BS EN 60034-8:2007+A1:2014 EN 60034-8:2007+A1:2014 (E) – 24 – U3 U1 W4 U4 U2 W4 W3 W1 V2 W2 U3 V4 U1 V2 W2 V4 U2 V3 U4 V1 V1 V3 W3 W1 U1 W4 U2 U3 U1 W3 U2 U3 W2 U4 W4 V4 W3 V4 V3 V3 V2 V1 V2 W2 W1 U4 W1 V1 Voltage L1 L2 L3 Join together Winding connection Low Start U1 V1 W1 [U1, U3]; [V1, V3]; [W1, W3]; [U2, V2, W2]; [U4, V4, W4] Parallel star Low Run U1 V1 W1 [U1, W2, U3, W4]; [V1, U2, V3, U4]; [W1, V2, W3, V4] Parallel delta High Start U1 V1 W1 [U2, U3]; [V2, V3]; [W2, W3]; [U4, V4, W4] Series star High Run U1 V1 W1 [U1, W4]; [V1, U4]; [W1, V4]; [U2, U3]; [V2, V3]; [W2, W3] Series delta Figure A.7 – Star-delta, dual voltage, twelve terminals (1:2) U1 U3 W1 V1 W3 L1 L2 L3 Isolate separately Start U1 V1 W1 U3; V3; W3 Run U1 V1 W1 Join together V3 Winding connection Star [U1, U3]; [V1, V3]; [W1, W3] Parallel star Figure A.8 – Part-winding, single voltage, six terminals BS EN 60034-8:2007+A1:2014 EN 60034-8:2007+A1:2014 (E) – 25 – U1 U1 U3 U2 U3 V2 U2 W3 W2 V3 V1 W1 W3 V3 V2 W2 V1 W1 Voltage L1 L2 L3 Isolate separately Join together Winding connection U3; V3; W3 [U2, V2, W2] Star Low Start U1 V1 W1 Low Run U1 V1 W1 High Run U1 V1 W1 [U1, U3]; [V1, V3]; [W1, W3]; [U2, V2, W2] Parallel star [U2, U3]; [V2, V3]; [W2, W3] Series star Figure A.9 – Part-winding, dual voltage, nine terminals (1:2) A.2.2 Multi-speed stator windings A.2.2.1 Two-speed (1:2), single-winding 1W 2U 2U 1V 1W 1U 2W 2V 2V 2W 1V 1U Speed L1 L2 L3 Isolate separately Low 1U 1V 1W 2U; 2V; 2W High 2U 2V 2W Join together Winding connection Series star [1U, 1V, 1W] Figure A.10 – Variable-torque, six terminals Parallel star BS EN 60034-8:2007+A1:2014 EN 60034-8:2007+A1:2014 (E) 1W2 – 26 – 1U1 1U1 2W 2W 2U 1W2 1W1 1V2 1V1 2V 2V 1V2 2U 1U2 1U2 2V 1V1 1W1 2U 2U 1U1 1U2 1W1 1U1 1V1 2V 1V2 1U2 1V2 1W2 1W1 2W 1W2 1V1 2V 2W Speed L1 L2 L3 Isolate separately Join together Winding connection Low 1U1 1V1 1W1 2U; 2V; 2W [1U1, 1W2]; [1V1, 1U2]; [1W1, 1V2] Series delta Low 1U1 1V1 1W1 2U; 2V; 2W [1U2, 1V2, 1W2] Series star High 2U 2V 2W [2U, 1U1, 1U2]; [2V, 1W1, 1W2]; [2W, 1V1, 1V2] Parallel delta High 2U 2V 2W [1U1, 1V1, 1W1, 1U2, 1V2, 1W2] Parallel star Figure A.11 – Variable-torque, dual-voltage (1 : √3), nine terminals This connection diagram is also applicable for star-delta starting on the low speed by omitting the high-speed, parallel-delta connection BS EN 60034-8:2007+A1:2014 EN 60034-8:2007+A1:2014 (E) – 27 – 1W 2U 2W 2U 1W 2W 1V 1U 1V 1U 2V 2V Speed L1 L2 L3 Isolate separately Low 1U 1V 1W 2U; 2V; 2W High 2U 2V 2W Join together Winding connection Series delta [1U, 1V, 1W] Parallel star Figure A.12 – Constant-torque, six terminals 2U 1W 1U 2V 1V 1W 2U 2W 1V 2V 2W 1U Speed L1 L2 L3 Low 1U 1V 1W High 2U 2V 2W Isolate separately Join together Winding connection [2U, 2V, 2W] Parallel star 1U; 1V; 1W Series delta Figure A.13 – Constant power, six terminals A.2.2.2 Multi-speed, with two or more independent windings Figures A.10, A.11, A.12 and A.13 are generally utilized as one of the windings in a three or four speed motor Many motor designs not produce circulating currents In these cases, the motor manufacturer will permanently join terminals (1W-1, 1W-2) and (2W-1, 2W-2) in Figures A.15 and A.16, respectively, and delete the -1 and -2 suffixes BS EN 60034-8:2007+A1:2014 EN 60034-8:2007+A1:2014 (E) – 28 – 1U 2U 1W 1V 2W 2V Isolate separately Winding connection 1W 2U; 2V; 2W Star 2W 1U; 1V; 1W Star Speed L1 L2 L3 Low 1U 1V High 2U 2V Figure A.14 – Variable-torque, six terminals 2U 1U 1W-1 1V 2W 2V 1W-2 Speed L1 L2 L3 Isolate separately Winding connection Low 1U 1V [1W-1, 1W-2] 2U; 2V; 2W Open delta High 2U 2V 2W 1U; 1V; 1W-1; 1W-2 Star Figure A.15 – Constant-torque,seven terminals 1U 2U 2W-1 1W 1V 2V 2W-2 Speed L1 L2 L3 Isolate separately Winding connection Low 1U 1V 1W 2U; 2V; 2W-1; 2W-2 Star High 2U 2V [2W-1, 2W-2] 1U; 1V; 1W Open delta Figure A.16 – Constant-power, seven terminals BS EN 60034-8:2007+A1:2014 EN 60034-8:2007+A1:2014 (E) – 29 – A.2.2.3 Three-speed Combinations of windings shall be selected from Figures A.1, A.2, A.10, A.11, A.12 and A.13 and the prefixes then adjusted 3U 3U 2U 1V 1W-1 1W-1 1V 1W-2 1W-2 3V 3W 2V 2W 3W 1U 1U 3V Speed L1 L2 L3 Isolate separately Join together Winding connection Low 1U 1V 1W-1 2U; 2V; 2W; 3U; 3V; 3W [1W-1, 1W-2] Open series delta Middle 2U 2V 2W 1W-1; 1W-2; 1V; 1U; 3U; 3V; 3W High 3U 3V 3W 2U; 2V; 2W Star [1W-1, 1W-2, 1V, 1U] Open parallel star Figure A.17 – Example of three-speed, constant torque motor using two separate windings, ten terminals 1U 3U 2U 2W-1 1W 1V 2V 2W-2 3W 3V Speed L1 L2 L3 Isolate separately Join together Winding connection Low 1U 1V 1W 2U; 2V; 2W-1; 2W-2; 3U; 3V; 3W - Star Middle 2U 2V 2W-1 1U; 1V; 1W; 3U; 3V; 3W [2W-1, 2W-2] Open delta High 3U 3V 3W 1U; 1V; 1W; 2U; 2V; 2W-1; 2W-2 - Star Figure A.18 – Example of three-speed motor using three separate windings, ten terminals BS EN 60034-8:2007+A1:2014 EN 60034-8:2007+A1:2014 (E) A.2.2.4 – 30 – Four-speed Combinations of windings shall be selected from Figures A.1, A.2, A.10, A.11, A.12 and A.13 and the prefixes adjusted 2W 3U 4U 1V 1W 1U 3W 3V 4V 4W 2V 2U Speed L1 L2 L3 Isolate separately Join together Winding connection Low 1U 1V 1W 2U; 2V; 2W; 3U; 3V; 3W; 4U; 4V; 4W - Series star Second 2U 2V 2W 1U; 1V; 1W; 3U; 3V; 3W; 4U; 4V; 4W - Series star Third 3U 3V 3W 2U; 2V; 2W; 4U; 4V; 4W [1U, 1V, 1W] Parallel star High 4U 4V 4W 1U; 1V; 1W; 3U; 3V; 3W [2U, 2V, 2W] Parallel star Figure A.19 – Example of four-speed, variable-torque motor using two separate windings, twelve terminals A.3 Single-phase asynchronous machines The terminal markings of single-phase, single voltage motor windings shall be as follows U1 U2 Direction of Rotation Z1 Z2 L1 L2 Join together Clockwise U1 U2 [U1, Z1]; [U2, Z2] Counter-clockwise U1 U2 [U1, Z2]; [U2, Z1] Figure A.20 – Split-phase or capacitor-start reversible motor BS EN 60034-8:2007+A1:2014 EN 60034-8:2007+A1:2014 (E) – 31 – Z1 U1 U2 CA1 Direction of Rotation Z2 CA2 L1 L2 Join together Clockwise U1 U2 [U1, Z1]; [U2, CA1]; [CA2, Z2] Counter-clockwise U1 U2 [U2, Z1]; [U1, CA1]; [CA2, Z2] Figure A.21 – Reversible capacitor-start motor with four terminals with externally connected capacitor A.4 DC machines (B1) (B2) (C1) (C2) A2 A1 E1 Direction of Rotation E2 L+ L– Clockwise [E1, A1] [E2, A2] Counter-clockwise [E1, A2] [E2, A1] Figure A.22 – Shunt motor or generator, four terminals (B1) E1 (B2) (C1) (C2) A1 A2 D1 D2 E2 L+ L– Join together Clockwise [E1, A1] [E2, D2] [A2, D1] Counter-clockwise [E1, A2] [E2, D2] [A1, D1] Direction of rotation Figure A.23 – Compound-motor or generator with compensating and commutating windings, six terminals NOTE The proposed connection results in a compounding condition which will strengthen the magnetic field during motor operation and will weaken it during generator operation If the opposite effect is desired, the connection of terminals D1 and D2 should change their positions BS EN 60034-8:2007+A1:2014 EN 60034-8:2007+A1:2014 (E) (C1) (C2) (B1) – 32 – ( D1) (B2) ( A2 ) A1 Direction of rotation (D2) A2 L+ L– Clockwise A1 A2 Clockwise A2 A1 Figure A.24 – Series-wound motor, two terminals In Figure A.24, the direction of rotation is independent of the polarity of A1 and A2 An arrow on the enclosure shall always be used to indicate the direction of rotation NOTE Clockwise rotation is shown in Figure A.24 Counter-clockwise rotation can only be achieved by the motor manufacturer changing the internal connection (that is, by reversing the series-winding connecting points (D1) and (D2) and then marking (D1) as A2) _ – 33 – BS EN 60034-8:2007+A1:2014 EN 60034-8:2007+A1:2014 (E) Annex ZA (normative) Normative references to international publications with their corresponding European publications The following referenced documents are indispensable for the application 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 When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies Publication IEC 60034-1 Year - 1) Title Rotating electrical machines Part 1: Rating and performance EN/HD EN 60034-1 Year 2004 IEC 60417 Data base Graphical symbols for use on equipment - - IEC 60445 (mod) - 1) Basic and safety principles for man-machine EN 60445 interface, marking and identification Identification of equipment terminals and conductor terminations 1) 2) Undated reference Valid edition at date of issue 2) 2007 2) NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW British Standards Institution (BSI) BSI is the national body responsible for preparing British Standards and other standards-related publications, information and services BSI is incorporated by Royal Charter British Standards and other standardization products are published by BSI Standards Limited About us Revisions We bring together business, industry, government, consumers, innovators and others to shape their combined 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