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I E 34 8 72 4844893 0637989 869

NORME

CEI

INTERNATIONALE IEC

INTERNATIONAL

STANDARD

AMENDEMENT

AMENDMENT

Amendement

Machines electriques tournantes

Partie 8:

Marques d extremites et sens de rotation

des machines tournantes

Amendment

Rotating electrical m achines

Part

8:

Terminal marking and direction of rotation

of rotating machines

O

CEI 1996

Droits de reproduction reserves -Co pyright all rights reserved

Bureau central de la Commission Electrotechnique lnternation ale

3

rue de Varemb e Genev e Suisse

Commission Electrotechnique lnternationale CODE PRlX

International Electrotechnical Commission PRICE CODE

M e m n y ~ a p o a ~ a un e n ~ p o r e r ~ u r e c n a uOMWCCHU

L

Pour prix voir catalogue en vigueur

For price see current catalogue

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I E C 3 4 8 7 2 4 8 4 4 8 9 1 O b 3 7 9 7 1 4 1 7

34-8 Amend. 2

O

IEC:1996

- 3 -

FOREWORD

This amendment has been prepared by IEC technical committee 2: Rotating machinery.

The text of this amendment is based on the following documents:

Full information on the voting for the approval of this amendment can be found in the report on

voting indicated in the above table.

FDlS

21946lFDIS

Page 3

CONTENTS

Add:

Annex A Further examples of terminal markings

Report on voting

21974lRVD

Page 7

Explanatory note

Add at the end of

the

last paragraph:

Further examples are given in annex A.

Page 20

Add the following new annex A:

nnex

normative)

Further examples

of

terminal markings

A l General

Terminal markings alone do not allow the operation mode of the machine to be deduced.

It should be noted that the figures below are illustrations only. They do not replace the rules

and the arrangement of terminals in the figures is not mandatory.

As in IEC 34-1, the rules below deal with external terminals, i.e. terminals at the disposal of the

user see explanatory note on page 7) and give further details for a clear understanding of the

marking itself. In the figures, markings of winding end-points which are not external terminals

are indicated in brackets, for information purposes.

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3 4 - 8 7 2 4 8 4 4 8 9 3 0 6 3 7 9 7 3 2 9 T rn

34-8 Amend.

2

O IEC:1996

5

A 2 Additional rules

A.2.1

All terminals shall be identified by a marking.

A.2.2 The terminals to be connected to the supply are those having internal connections to

the winding ends identified by the lowest suffix, i.e. suffix 1 with untapped single-section

windings; see figures A.l and A.2.

A.2.3

In any electrical machine there shall be not more than one terminal with a given

marking, unless each terminal is capable of performing the full electrical function appropriate to

that marking, so that any terminal may be used for the connection; see figure A.1.

A.2.4 If more than one terminal is provided to share the current, additional numerical

markings are necessary, separated by a hyphen from the suffix of the marking; see figure A.2.

A.2.5 For windings with intermediate points, if more than two intermediate points per section

are provided, the terminals corresponding to the tappings shall be marked with the following

suffixes:

etc.; see figure A.5.

NOTE

The rules given in IEC 445, subclause 5.2.2, for tappings in a single element cannot be applied stric tly

to rotating machines with more than two intermediate points per section; see figure 2.

A .2.6 Multi section windings

A.2.6.1 The terminals corresponding to the ends of the sections shall be marked with the

following suffixes see figures 3 and A.3):

first section: 1, 2;

second section: 5 6;

third section: 9, 10;

fourth section: 13, 14

In any section, the end-point closer to the supply shall be marked with the lower numerical

suffix. This applies to all multi-section windings, whatever arrangements they may be meant

for; see figures A.7, A.8, A.9 and A.lO.

A.2.6.2 If two or more sections of a winding are connected to a common terminal, it shall take

the lowest of the suffixes of the ends connected; see figure A.4.

A. 2.7 eparate

windings

A.2.7.1 Separate windings are such that, whatever purposes they may be intended to serve,

they are only used one at a time whether fully or partially, i.e. they are not intended for any

arrangement combining two or more windings or sections of them.

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34-8 Amend. 2 O IEC:1996

- 7 -

A.2.7.2 For machines with separate windings, the requirements of A.2.5 and A.2.6 shall apply

for each separate winding. In addition, all terminals shall be marked with numerical prefixes

corresponding to the separate winding to which they belong, namely:

first winding: 1;

second winding: 2;

third winding: 3;

fourth winding: 4;

etc.; see figures 4 and A.6.

Moreover, in the case of multi-speed machines, the marking of terminals for connection to the

supply shall be in accordance with A.2.8.2 and A.2.8.3.

A. 2.8 Multi speed machines

A.2.8.1 If a machine has only one winding, for example a Dahlander or a pole-modulation

winding, the section end-points which are connected to the supply, when the sections are

connected for the lowest speed, shall be identified by the lowest suffix.

For each speed, the terminals to be connected to the supply shall be marked with a numerical

prefix. The sequence of prefixes corresponds with the increasing speed sequence.

The suffix is omitted if the marking of a terminal has a prefix; see figures A.7 and A.8.

A.2.8.2 If a machine has separate single-section windings for example see figure 4 for the

illustration of two separate windings) the

rules of A.2.7 shall apply with the sequence of

prefixes corresponding to an increasing speed sequence.

The terminals to be connected to the supply are those having internal connections to the

winding ends identified by the lower suffix.

For each speed, the suffixes of the terminals to be connected to the supply are omitted.

A.2.8.3 If a machine has separate windings including multi-section windings, for example

Dahlander or pole-modulation windings, the rules of A.2.8.1 and A.2.8.2 apply in combination;

see figures A.9 and A.lO.

A.2.8.4 The relation between direction of rotation and alphabetical sequence of the terminal

letters given in 5.1 is valid for all speeds. If, in a winding, two phases have to be switched over

to achieve this, then the switch shall be applied to terminal markings and and shall be

applied to the arrangement for the lowest speed; see figures A.7, A.8 and A.9.

A.2.9 When an end of a main winding and an end of an auxiliary winding are connected to the

same terminal, that terminal shall be identified according to the rule for the main winding;

see figures A . l l and A.12.

NOTE

This rule cannot be applied to certain types of small power motors. A specific terminal coding system

for such motors is under consideration.

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I E 34-8 72 844891 0b37997 935

34-8

Amend

O

IEC:1996

9

v w

U V W

LTd

 u2) v2) w2

A

B

IEC 915196

Figure A. l Machines with two terminal boxes for alternative connections

to the supply either A or connected to supply)

A

IEC 91 96

Figure A.2

-

Machine with parallel connected cables A and connected to supply)

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I E 34 8 72 484489L 0637999 708

34-8 Amend. 2 O

IEC: 996

IE

9 7 M

Figure

A.3

Four-section winding

24

terminals

E 9181

Figure

A.4

Two-section winding connected to nine terminals

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34-8 Amend. O IEC:1996

-13 -

Figure A.5 Two-section winding with four tappings 36 terminals)

1U6

1

V6 1W6 2U6 2V6 2W6

IE 9 W

Figure A.6 Two separate two-section windings

24

terminals)

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3 4 0 7 2 4 0 4 4 0 9 3 0 6 3 0 0 0 3

8 3 7

34 8 mend. 2 O IEC:1996 15-

2U 2v 2W

0

0

(U2) (U5) (V2) (V5) (W2) (W5)

1

Low speed: 1W,

1

V

1

U

connected to supply

Winding connection: series star

(U1) (U6) (V1) (V6) ' (W1) W6)

0

0

0

1W 1

v

1U

1

Line

Line

2U 2v 2W

U5) (V2) (V5) W2)

W5)

High speed:

ZU 2V,

2W connected to supply

1

W connected to

1V

and

1

U

Winding connection: parallel star

'

(U1) (U6) (V1)

V6)

(W1)

'

we)

A

1U

External common point

IE 9 Q M

NOTE

Terminals

1U

and 1W have been switched over for the lower speed

in

order to have the same direction

of rotation for both speeds.

Figure

A.7

Three-phase two-speed winding with six terminals,

for Dahlander or sum-modulated series star and

parallel star arrangements

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34 8 Amend. 2

O IEC:1996

17-

2U 2v 2W

Q

U2)

b

U5) V2)

V5)

w2)

Winding connection: series delta

4t

U1) U6)

1W 1v

U

T

Line

Line

I

2U 2v 2W

Q

U2)

Us)

V2) V5) W2) W5)

High speed: 2U 2V 2W connected to supply

I

1U

connected to

1

V and W

Winding connection: parallel star

1U

External common point

IEC 922 96

NOTE

Terminals 1U and 1W have been switched over for the lower speed in order to have the same direction

of rotation for both speeds.

Figure A.8

-

Same winding as in figure A.7 but with series delta

and parallel star arrangements

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34 8 72 844893 0638007 482

34-8

Amend.

2 O

IEC:1996

19

External common point

IE

9 3M

The sequence of the numerical prefixes of terminals corresponds with the speed sequence:

Lowest speed:

1U 1V

1W connected to the supply

Intermediate speed: 2U 2V 2W

connected to the supply

Highest speed:

3U 3V 3W

connected to the supply

The relation between direction of rotation and alphabetical sequence of the terminal letters

given in A.2.8.4 is valid for all speeds.

NOTE Terminals 1U and 1W have been switched over for the lower speed in order to have the same direction

of rotation for the three speeds

Figure

A 9

Three-phase three-speed induction motor with two separate

windings one being a winding like in figure

A 8

for bottom

and top speeds with Dahlander or sum-modulated arrangements

the other a single star-connected winding for the intermediate

speed nine terminals

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4 8 4 4 8 9 2 0 6 3 8 0 0 9 255

W

34-8 Amend. 2

O

IEC:1996

-21

W

IE

9 4M

The sequence of the numerical prefixes of terminals corresponds with the speed sequence:

First winding (realizing the lowest speed and speed number 3):

48 poles:

1U, 1V,

1

W connected to supply

12 poles:

3U 3V, 3 ~ onnected to supply

Second winding (realizing speed number 2 and the highest speed):

16 poles:

2U, 2V, 2 ~ onnected to supply

4 poles: 4U, 4V, 4 ~ onnected to supply

The relation between direction of rotation and alphabetical sequence of the terminal letters

given in A.2.8.4 is valid for all four speeds.

')The linking of other terminals to achieve the selected speed will depend upon the details of the windings.

Figure A.10 - Three-phase four-speed induction motor with two separate

windings each being a two-speed difference-modulated

arrangement for example a motor with 48/12 and 1614 poles

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I E 34 8

72

844893 0638OlL 903

34-8 Amend. 2 O IEC:1996

23

Supply to terminals U1 and U2

Clockwise rotation as shown. To reverse rotation interchange

Z1) and 22) .

Figure

A . l l -

Split-phase or capacitor-start reversible motor with two terminals

a Clockwise rotation

Supply to terminals U1 and

U2

b) Counter-clockwise rotation

Figure A.12 Reversible capacitor-start motor with three terminals

and externally connected capacitor

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I E C 3 4 - 8 7 2 I 8 4 48 9 L O b 3 8 0 1 3 7 8 b

Publications de la CEI prCparCes

par le ComitC d Etudes no 2 suite)

34-17 (1992) Partie 17: Guide application des moteurs h

induction a cage aliment par convertisseurs.

34-18: valuations fonctionnelles des systkmes d'isolation.

34-18-1 (1992) Section 1 Rincipes directeurs gBneraux.

Amendement 1 (1996).

34-18-21 (1992) Section 21: ProcAures d'essai pour enroulements a

fils Evaluation thermique et classification.

Amendement 1 (1994).

Amendement 2 (1996).

34-18-22 (1996) Section 22: Proctdures d'essai pour enroulements

fils Classification des modifications et des substi-

tutions de composants d'isolation.

34-18-3 1 (1992) Section 3 1 ProcBdures d'essai pour enroulements

pr6formBs Evaluation thermique et classification

des systkmes d'isolation utilisBs dans les machines

jusqu'i et y compris 50 MVA et 15 kV.

Amendement 1 (1996).

34-18-32 (1995) Section 32: Prockdures d'essai pour enroulements

priformks Evaluation Qectrique des systkmes

d'isolation ut il il s dans les machines jusqu'8 et y

compris 50 MVA et 15 kV.

34-18-33 (1995)

Section

33:

Pnx6dure s d essai

pour mdements

pn5f-

 

Evaluation fonctionnellea plusiem

factem

Endurance

sous contr ink

thermique et dlechique

combink des s p t h m d'isolation u tili k dans les

machines jusquP t y compris 50 MVA et 15 kV.

34-19 (1995) Partie 19: MBthodes sp6cifiques d'essai pour

machines a courant continu h alimentation conven-

tionnelle ou redress .

34-22 (1996) Partie 22: enkratr ices courant alternatif pour

moteurs a combustion interne et

ti

pistons.

72: imensions et skries de puissances des machmes dlectriques

tournantes.

72-1 (1991)

Partie 1: Msignation des carcasses entre 56 et 400 et

des brides entre 55 et 1 080.

72-2(1990) Partie 2: Msignat ion des carcasses entre 355 et

1 000 et de.s brides entre 1 180 et 2 360.

72-3 (1994)

Partie 3: Petits moteurs incorpon5s Msignation s

brides BFlO BF50.

136 (1986)

Dimensions des balais et porte-balais pour machines

Blectriques.

Amendement 1 (1995).

276 (1968)

NfiNtions et nomenclature des balais de charbon,

des porte-balais, des collecteurs et des bagues.

Modification no 1 (1987).

279 (1969) Mesure de la r6sistance des enroulements d'une

machine courant altematif en fonctionnement sous

tension alternative.

356 (1971)

Dimensions des collecteurs et des bagues.

413 (1972) Mdthodes d'essai pour la mesure des proprides

physiques des m a t i k de balais pour machines Qec-

niques.

560 (1977) Wfinitions et terminoiogie des porte-balais de

machines dlectriques.

681: imensions des mo tem de faible puissance pour applications

particuli res.

681 1 (1980)

F remike partie: Moteurs pour bd eu rs mazout.

773 (1983)

MBthodes d'essai et appareils pour la mesure des

propriBt6s ogrationnelles des balais.

778 (1984)

Porte-balais pour bagues, groupe R -execution RA

IEC publications prepared

by Technical Committee No.

2

(continued)

34-17 (1992)

Part 17: Guide for application of cage induction

motors when fed from converters.

34-18: unctional evaluation of insulation systems.

34-18-1 (1992) Section 1 General guidelines.

Amendment 1 (1996).

34-18-21 (1992) Section 21: Test procedures for wire-wound

windings -Thermal evaluation and classification

Amendment 1 (1994).

Amendment 2 (1996).

34- 18-22 (1996) Section 22: Test procedures for wire-wound

windings Classification of changes and insulation

component substitutions.

34-18-31 (1992) Section 31

:

Test procedures for form-wound

windings Thermal evaluation and classification of

insulation systems used in machines up to and

including 50 M V A and 15 kV.

Amendment 1 (1996).

34-18-32 (1995) Section 32: Test procedures for form-wound

windings Electrical evaluation of insulation

systems used in machines up to and including

50 MVA and 15kV

34-18-33 (1995) Section 33: Test procedures for form-wound

windings Multifactor functional evaluation

Endurance under combined thermal and electrical

stresses of insulation systems used in machines up to

and including 50 MVA and 15 kV

34-19 (1995)

Part 19: Specific test methods for d.c. machines on

conventional and rectifier-fed supplies.

34-22 (1996) Part 22: AC generators for reciprocating internal

combustion (RIC) engine driven generating sets.

72: imensions and output series for rotating electrical machines.

72- 1 (199 1)

Part 1 Frame numbers 56 to 400 and flange numbers

55 to 1 080.

72-2 (1990)

Part 2: Frame numbers 355 to 1 000 and flange

numbers 1 180 to 2 360.

72-3 (1994)

Part 3: Small built-in motors Flange numbers BFlO

to BF50.

136 (1986)

Dimensions of brushes and brush-holdm for elec-

trical machinery.

Amendment 1 (1995).

276 (1968)

Definitions and nomenclature for carbon brushes,

brush-holders, commutators and slip-rings.

Amendment No. 1 (1987).

279 (1969)

Measurement of the winding resistance of an a.c.

machine during operation at alternating voltage.

356 (1971)

Dimensions for commutators and slip-rings.

413 (1972)

Test procedures for determining physical properties

of brush materials for electrical machines.

560 (1977)

Definitions and terminology of brush-holders for

electrical machines.

681: Dimensions of small power motors for definite

purpose

application.

681-1 (1980)

Part 1: il burner motors.

773 (1983)

Test methods and apparatus for the measurement of

the operational characteristics of brushes.

778 (1984)

Brush-holders for slip-rings, Group R -type RA.

suite)

continued)

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I E 34 P T B 72 4844871 0303756 2

2 . 34-8 amend. 1 @ CEI

PREFACE

Le p resen t amendement a 6tQ Qtabli pa r le Comitb dqEt udes no

2

de la

CEI Machines tou rna nte s.

Le texte de cet amendement est issu des documents suivants:

Les ra ppo rts de vote indiques dans le tableau ci-dessus donne nt toute

informat ion sur le vote ayant about i 2 I 'approbation de cet amendement.

Page

19

Rapport de vote

2CBCI564

5.

Relat ion en tr e marquage dqextr6mit8s e t sens de rotat i on

Proc dure

des Deux

M o i s

Z BC1562

Resle

des S X Mois

Z BC1540

Remplacer le titre de cet article par le suivant:

Rapport de vote

Z BC1560

5

Relat ion en tr e le marquage des extr8mitks e t le sens d e rotat ion

Remplacer le paragraphe existant

5 1

par le suivant:

5 .1

Machines triphase es courant alternatif (sans col lecteur)

5.1

I Les connexions internes de toute machine

5

ses extrGmit6s doivent

Btre

tel les que le sens de rotat ion soit dans le sens des aiguil les d'une

montr e qua nd I 'or dre de succession dans le temps des tensions d e

phase du syst rne est le m me que I 'o rdr e alphabbtiq ue des marquages

des extr6mit6s auxquelles les phases du systeme sont connect6es. Cette

disposit ion des connexions internes doit s 'appliquer meme si certaines

carac t6ris tique s de conception r end ent impraticables la rota tio n I-6elle

dans le sens des aiguilles d'une montre.

5.1 .2

Si une machine doit tourner dans le sens contraire des aiguil les

d'une montre sur un systeme dont la succession de phases est nor-

malisbe (ou tourner dans le sens des aiguilles d'une montre avec une

succession

non normalisQe des phases du systkme), un e pai re de csbles

du

systeme doi t Btre inte rv er t i e ent re les extr6mitks auxquelles ces

cables auraient dir Qt re connectes conformbment au pa rag rap he 5.1.1.

Les connexions internes de la machine

5

ses extrbmit6s doivent

demeurer inchangees.

1;

5.1.3 Si un seul sens de rotat ion est exig6 ou peut 6t r e ut i l isb, e sens

doit Btr e ind iqu b p ar une flbche, sous laquel le les let t re s de marquage

des extremites doiv ent k t re rGp6t6es, en l is ant de la gauche vers la +

droite, dans I 'o rdr e dans lequel les extrdmites doi ven t kt r e connect6es

pour suivre I 'ordre de succession des tensions de phase

du

systitrne.

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33L 7

-

C.D.U.1U.D.C.: 621.313.1:621.315.683.777:531.15

-

O M M I S S I O N E L E C T R O T E C H N I Q U E N T E R N A T I O N A L E

(a ffil iie JOrganisation nternationale de Normalisation SO)

R E C O M M A N D A T I O N D E

L A

C E I

I N T E R N A T I O N A L E L E C T R O T E C H N I C A L C O M M I S S I O N

(affiliated to the International Organization for Standardization SO)

I E C R E C O M M E N D A T I O N

Publication 34 8

Premiere Bdition irst edition

1 9 7 2

Machines electriques lournantes

Huitieme partie: Marques d extremites et sens de rotation des machines tournantes

Rotating electrical machines

Part 8: Terminal markings and direction of rotation of rotating machines

Droits de reproduction rBserv is opyright - all r ights reserved

Aucune parlie de cette publication ne peut Btre reproduite ni utilisl e sous No part of this publication may be reproduced or utilized in any

suelque forme que ce soit et par aucun prochdh, Blectronique ou mhca- form or

by

an.r means, electroni c or mechanical, in cluding photocopying

nique y compris l a photocopie et les microfilms, sans I accord lc ri t de I lditeur ,

and microfilm, without permissbn in wiling from the publisher.

Bureau Central de la Comm ission Electrotechnique lnternationale

1, rue de VarembB

19 .56

rix Fr. s.

-------

Price

S.

Fr.

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CONTENTS

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~ ~

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3 4 P T 8 7 2 1 ~ 4 8 4 4 8 9 3

333 2 2

--

 

Page

FOREWOR

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

PREFACE . . . . . . . . . . . .. . . . . . . . . . . . .. . . . . . . . . . . . .. . . . . . . . . . . . .. . . . . . . . . . . . .. . . . . . . . . . . .. .

Clause

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

xplanatory note 7

1

Scope . . . . . . . . . . . .. . . . . . . . . . . . . .. . . . . . . . . . . . .. . . . . . . . . . . . . .. . . . . . . . . . . . .. . . . . . . . . . . . 7

2. Terminal markings of a. c. machines excluding a.c. commutator machines)

. . . . . . . . . . . . . . . . . . 8

.

Terminal markings of d. c. commutator machines

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

13

4

Direction of rotation

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

19

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Relation between terminal markings and direction of rotation

19

-

 .

- -

=

=

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5

INTERNATIONAL ELECTROTECHNICAL COMMISSION

ROTATING ELECTRICAL MACHJNES

Part 8: Terminal markings and direction of rotation of rotating machines

r 7

\

/ >

FOREWOR

1)

Th e formal decisions or agreements of th e I E C on technical matters prepared by Technical Committees on which all the

Nationa l Com mittees having a special interest therein ar e represented express a s nearly as possible an internationa l

consensus of opinion o n the subjects dealt with.

2

They have the formofrecommendationsfor internationaluse and they areaccepted by theNa tional Comm itteesin that sense.

3 In o rder to promo te this international unification the IEC expresse s the wish that all National Committees having as yet no

nationalrules whenpreparingsuchrules shouldu se theIEC recom mend ations as thefundamental basis for theserules in so

far as na tional conditions will permit.

4) The desirability is recognized of extending international agreement on these matters through an endeavour to harmonize

national standardization rules with these recommendations in so far as national conditions will permit. The National

Committees pledge their influence owards th at end.

PREFACE

This Recommendation has been prepared by Sub-committee 16A, Terminal markings for rotating

machines, of IE C Technical Committee No. 16, Terminal markings and other identifications.

Drafts were discussed at the meeting held in London in 1968. As a result of this meeting, a draft was sub-

mitted to the National Committees for approval under the Six Months Rule in March 1969. Amendments

were submitted to the National Committees for approval under the Two Months Procedure in October

1970.

The following countries voted explicitly in favour of publication:

Australia

Austria

Belgium

Czechoslovakia

Denmark

Finland

France

Germany

Hungary

Israel

Japan

Netherlands

Norway

Poland

South Africa

Sweden

Switzerland

Turkey

Union of Soviet Socialist Republics

Yugoslavia

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I E C 3 4 P T 8 7 2 4 8 4 4 8 7 3 0 0 3 3 3 O b T

TERMINAL MARKINGS

AND DIRECTION OF ROTATION

OF ROTATING N I A C m S

Explanatory Note

This Recommendation, as far as it deals with terminal markings, is based on the following marking

principles

a)

Windings are distinguished by a (capital) letter (e. g. U,

V,

W .

b End points and intermediate points of a winding are distinguished by a numerical suffix to the winding

letter (e.g. U1 U2, U3).

c

Similar windings of

a

group having the same winding letters are distinguished by a numerical prefix to

the winding letter (e. g. lU, 2U).

d Winding letters for d. c. windings are chosen from the f is t part of the alphabet and winding letters for

a. c. windings from the second part of the alphabet.

This Recommendation deals with external terminals, i.e. terminals at the disposal of the user for

connection of the machine with the supply and with other apparatus and for other use. I t can be applied

to internal terminals also, the more so as the inherent logic of the system makes extension to almost any

case possible.

If no confusion is possible, the p r e k or the suffix or both may be omitted.

I t is obvious that this Recommendation does not cover all cases in detail; i t makes it possible however to

deal with cases not spec5cally mentioned in the text.

1 . Scope

This Recommendation concerns a.c. machines without commutator and d.c. commutator

machines and deals with

a)

terminal markings;

b direction of rotation;

c) relation between terminal markings and direction of rotation.

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I E C

3 q P T 8 7 2 L lBqLt871 0033108 3

p p p

9

t l l

2 v 2 W2

6

i

6 W6

Note 'ordre interrompu 1 2,

5

6 est choisi pour distin-

Note

he interrupted sequence 1 2, 5, 6 is chosen to dis-

guer cet enroulement de l'enroulement prises

tinguish this winding from the tapped winding

(figure 2). (figure 2).

FIG.

3. nroulement en deux moitiks pour couplage en serie ou en parallble avec 12 extrimilks sorties.

Split winding intended for series-parallel arrangement with 12 terminals.

I

 

;

U2 v2 W2 2U2 2v 2 2W2

Note

-

an s le cas de moteurs pBles commutables avec Note hen used in change-pole motors with two

deux enroulements skparb, correspondant deux

separate w indings for two speeds, the lower (higher)

vitesses, le prkiixe numkrique le plus bas (le plus

numerical prefix shall indicate the lower (higher)

lev ) oit indiquer la vitesse la plus basse (la plus

speed.

klevke).

FIG.

4 -

eux enroulements skparks qui ne se prstent pas un couplage skrie parallble avec six extrk-

mites sorties.

Pair of separate windings not intended for series-parallel arrangement each with six terminals.

---- J

.

1

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Petite vitesse:

Alimentation en lW, lV, 1U.

Couplage en triangle serie.

Low speed:

lW, lV, 1U connected with supply.

Winding connection: series delta.

Ligne

Line

Ligne

Line

Grande vitesse:

Alimentation en 2U, 2V, 2W; les extr6mitk

lW, lV, 1U sont rkunies en un point neutre.

Couplage en ktoile parallkle.

IEC 34

P T B

72

4 8 4 4 8 7 1

33IIO I

1

otes I

e

pr6fixe num6rique le plus bas (le plus Bev6) Notes I he lower (higher) numerical prefix shall indi-

doit indiquer la plus petite (la plus grande)

cafe the supply ferminals for the lower (higher)

vitesse. speed.

2.

a relation entre le sens de rotation et l ordre

2. he relation between direction of rotation and

alphas tiqu e des lettres du paragraphe 5.1 est

alphabeticalsequence of the termha1 letters giv-

applicable aux d ew vitesses. en

in

Sub-clause 5.1

is

valid for both speeds.

FIG.

8.

nrou Ieme nt deux vitesses avec six extrkmitks sorties

Two speed winding with six terminals

Point commu n extdrieur

xternal common point

High speed

:

2U, 2V, 2W connected with supply, 1U

connected to 1V and 1W.

Winding connection: parallel star.

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I E 3 4 P T 8 7 2 4 8 4 4 8 7 3

FIG. 10. nroulement principal

d'un moteur monophas6.

FIG. 11. nroulement auxiliaire

d'un moteur monophas6.

Main winding of Auxiliary winding

a single-phase motor.

a single-phase motor.

2.5 Les marques des extrCmit6s sorties d'un enroule-

2.5 The terminal markings of d. c. excitation wind-

ment d'excitation en courant continu d'une

ings of synchronous machines (Figure 12) shall

machine synchrone (figure 12) seront conformes

be in accordance with the terminal markings of

celles des extrimit des enroulements d'exci-

the d. c. separately excited field windings (Figure

tation s6parCe en courant continu (figure 21,

21, page 15).

page

15 .

F

F

FIG. 12. nroulement d'excitation en courant continn d'une machine synchrone avec deux extrernites

sorties.

D.C. excitation winding of a synchronous machine with two terminals.

3. Marquage des extrCmit6s d enroulement sorties 3 . Terminal markings of

d.

c. commutator ma-

des machines avec collecteur

B

courant continu

chines

3 . 1 Les marques des extrbmite's sorties des enroule-.

3.1 The terminals of the windings of d.c. commuta-

ments des machines courant continu avec col-

tor machines shall bemarked as follows:

lecteur doivent dtre comme indiqu6 ci-aprbs

FIG. 13. nroulement induit avec deux extr6mit6s sorties.

Armature winding with two terminals.

FIG. 14. nroulement de commutation avec deux extrCmit6s sorties.

Comrnutating winding with two terminals.

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I E C 3 4 P T 8

7 2

8 4 4 8 7 1 0 0 3 3 1 1 4

7

FIG

1. nroulement d'excitation skparCe avec deux extrkmitbs sorties.

Separately excited excitation winding with two terminals.

FIG

2. nroulement d'excitation s6parCe en deux moitik pour couplage en sCrie ou en parallkle avec

quatre extrCmit6s sorties.

Separately excited excitation winding for series-paralleI arrangement with four terminals.

FIG

3. nroulement auxiliaire situC sur l'axe direct avec deux extr6mitCs sorties.

Direct axis auxiliary winding with two terminals.

FIG

4. nroulement auxiliaire situC sur l'axe transversal avec deux extrCmitts sorties.

Quadrature axis auxiliary winding with two terminals.

3.2 Les flux produits par deux enroulements d'exci-

3.2 Two excitation windings shall have cumulative

tation doivent avoir le mCme sens si, dans les

magnetic effects i in both windings current

deux enroulements, le courant pCnktre par l'ex- passes fromthe terminal with the lower (higher)

trCmitC avec le suffixe numirique le plus bas (le

numerical s u f h to the terminal with the higher

plus Clevk) et sort par l'extrCmit6 avec le sufExe

(lower) suEx.

numdrique e plus tlev6 (le plus bas).

3.3 Les champs magnetiques des enroulements de

3.3 The magnetic fields of commutating and corn-

commutation et de compensation doivent Ctre pensating windings shall be of correct polarity

de polarit6 correcte l'un par rapport

i

I'autre et with respect to each other and to the magnetic

par rapport au champ magnetique de I'enroule- field of the armature winding if in all these wind-

ment d'induit, si, dans tous ces enroulements le ings current passes from the terminal with the

courant p6nhtre par I'extrtmitC avec le sufEixe lower (higher) numerical suffix to the terminal

numhrique le plus bas (le plus 6levC) et sort par

with the higher (lower) suffix.

l'extrCmit6 avec le sufExe numerique le plus lev6

(le plus bas).

3. 4 La connexion en sCrie de l'enroulement d'in- 3.4 The series connection of armature, commu-

duit, de l'enroulement de commutation et de tating and compensating windings with two

l'enroulement de compensation avec deux ex tr 6

terminals shall be marked as follows

:

mitQ sorties doit Ctre marquee comme suit:

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I E

34 PT * 7 q844B9L

33336

ppp

7

3 . 5 Quand deux ou plus de deux enroulements sont

3 5

When two or more windings are connected to

connect une mSme borne, son marquage doit

the same terminal, its marking shall be derived

Stre derive du marquage d'un ou de plusieurs

from the terminal markings of one or more of

enroulement(s)connectt(s), c o m e llustr6 dans

the winding(s) connected, as illustrated in Fig-

les figures

29 32.

ures

29

to

32.

Note e sens de rotation montr6 dans les figures 29 ti 32

Note he direction of rotation shown in F igures 29 to 32

st conform e au paragraphe 5 . 3 .

s according to Sub clause

5 . 3 .

A E l

oulor

AE

oulor

A

oulor

A

C2E2

oulor

CE

oulor

C

oulor

C2

FIG.

29.

Moteur ou generatrice cornpens6 avec enroulements de compensation et de commutation

imbriquks avec deux extr6mitCs sorties; sens de rotation droite.

Compensated motor or generator with interlaced compensating and commutating windings,

with two terminals; direction of rotation clockwise.

A E2

oulor

AE

oulor

A

oulor

A

C2E

oulor

CE

oulor

olilor

FIG.

30.

Moteur ou g6nCratrice cornpens6 avec enroulements de compensation et de commutation

interconnect6s, avec deux extr6mitBs sorties; sens de rotation gauche.

Compensated motor or generator with interconnected compensating and commutating wind-

ings, with two terminals; direction of rotation: anticlockwise.

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I E C

3 4 P T * B

7 2

g 0 4 4 B 9 3 0 0 3 3 3 3 8

b

4.

Sens de rotation

4.

Direction of rotation

4.1 Si la machine ne posdde qu un seul bout d arbre

4.1 If the machine has only one shaft end (or two

(ou posdde deux bouts d arbre de diamgtres dif-

shaft ends of different diameters), the directionof

ferents), le sens de rotation est celui quevoitun rotation is the one observed when facing the sin-

observateur place face au bout d arbre unique

gle shaft end (or facing the shaft end with the

(ou face au bout d arbre le plus gros). Si la

largest diameter). If the machine has two shaft

machine possbde deux bouts d arbre de mgme

ends of the same diameter or has no shaft ends,

diambtre ou n en possbde pas, l observateur est

the position of the observer is:

place

a ) du bout oppos6 au collecteur ou aux a ) on the end opposite the comnlutator or the

bagues, s il n existe un collecteur et/ou des

collector-rings, if the commutator and/or

bagues que d un seul c6tC de la machine;

collector-rings exist at one end of the ma-

chine only;

6 du bout des bagues si la machine poslde

b ) on the collector-ring end, if the machine

un collecteur d un c6t6 et des bagues de has a commutator at one end and collec-

I autre; tor-rings at the other;

c ) selon entente particulibre, dans le cas oc es

c) in accordance with special agreement, in

conventions precidentes prdtent confu- the case where a) and b) lead to misunder-

sion. standing.

4.2 Le sens de rotation

< A

droite)) (ou marche

4.2 Clockwise rotation (or clockwise running) cor-

droite) correspond une rotation de la machine

responds to a rotation of the machine in the

dans le sens des aiguilles d une montre.

direction of the hands of a clock.

5.

Relation entre marquage d extrk mitb e t sens de 5 . Relation between terminal markings and direc-

rotation tion of rotation

5 . 1 Maclzines polyphasies sans collecteur h courant

5.1 A C. poly-phase mach ines witlzout comm uta-

alterriatif tor)

Le sens de rotation doit Ctre dans le sens des The direction of rotation shall be clockwise

aiguilles d une montre quand l ordre alphab6-

when the alphabetical sequence of the terminal

tique des lettres correspond l ordre de suc- letters of a phase group corresponds with the

cession des differentes phases dans le temps.

time sequence of the terminal voltages.

5.2

Moteurs monophasb saris collecteur h courant

5.2 A C. single-phase motors witttout comm utator)

alternatif

Le sens de rotation doit Ctre dans le sens des

The direction of rotation shall be clockwise

aiguilles d une montre quand les connexions

if connections are made according to Figure

sont faites comme indiqui lafignre 33, page20.

33, page 20.