IEC 60934:2000

NORME CEI
INTERNATIONALE
IEC
INTERNATIONAL
Edition 3.1
STANDARD
2007-03
Edition 3:2000 consolidée par l'amendement 1:2007
Edition 3:2000 consolidated with amendment 1:2007
Disjoncteurs pour équipement (DPE)

Circuit-breakers for equipment (CBE)

Numéro de référence
Reference number
CEI/IEC 60934:2000+A1:2007
Numérotation des publications Publication numbering

Depuis le 1er janvier 1997, les publications de la CEI As from 1 January 1997 all IEC publications are

sont numérotées à partir de 60000. Ainsi, la CEI 34-1 issued with a designation in the 60000 series. For
devient la CEI 60034-1. example, IEC 34-1 is now referred to as IEC 60034-1.

Editions consolidées Consolidated editions

Les versions consolidées de certaines publications de la The IEC is now publishing consolidated versions of its

CEI incorporant les amendements sont disponibles. Par publications. For example, edition numbers 1.0, 1.1
exemple, les numéros d’édition 1.0, 1.1 et 1.2 indiquent and 1.2 refer, respectively, to the base publication,
respectivement la publication de base, la publication de the base publication incorporating amendment 1 and

base incorporant l’amendement 1, et la publication de the base publication incorporating amendments 1
base incorporant les amendements 1 et 2. and 2.
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NORME CEI
INTERNATIONALE
IEC
INTERNATIONAL
Edition 3.1
STANDARD
2007-03
Edition 3:2000 consolidée par l'amendement 1:2007
Edition 3:2000 consolidated with amendment 1:2007
Disjoncteurs pour équipement (DPE)

Circuit-breakers for equipment (CBE)

© IEC 2007 Droits de reproduction réservés ⎯ Copyright - all rights reserved
Aucune partie de cette publication ne peut être reproduite ni No part of this publication may be reproduced or utilized in any
utilisée sous quelque forme que ce soit et par aucun procédé, form or by any means, electronic or mechanical, including
électronique ou mécanique, y compris la photocopie et les photocopying and microfilm, without permission in writing from
microfilms, sans l'accord écrit de l'éditeur. the publisher.
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CODE PRIX
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PRICE CODE
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МеждународнаяЭлектротехническаяКомиссия
Pour prix, voir catalogue en vigueur
For price, see current catalogue

– 2 – 60934 © CEI:2000+A1:2007

SOMMAIRE
AVANT-PROPOS . 10

1 Domaine d'application . 14

2 Références normatives . 14

3 Définitions . 18

3.1 Définitions relatives à la protection et aux appareils de connexion . 18

3.2 Termes généraux . 20

3.3 Définitions relatives aux courants . 22
3.4 Définitions relatives aux tensions . 24
3.5 Définitions relatives aux éléments constructifs d'un DPE . 26
3.6 Définitions relatives aux relais dans les DPE . 28
3.7 Définitions relatives à l'isolation et aux distances d'isolement dans un DPE . 30
3.8 Définitions relatives au fonctionnement des DPE . 34
3.9 Définitions relatives aux caractéristiques de fonctionnement des DPE . 38
3.10 Définitions relatives aux valeurs caractéristiques . 38
3.11 Définitions concernant la coordination des DPE et des DPCC associés
dans le même circuit . 40
3.12 Définitions relatives aux bornes et aux terminaisons . 42
3.13 Définitions relatives aux essais . 48
4 Classification . 48
4.1 Quantité de pôles . 48
4.2 Méthode de montage . 48
4.3 Mode de connexion . 48
4.4 Mode de fonctionnement . 50
4.5 Mode de déclenchement . 50
4.6 Influence de la température ambiante . 50
4.7 Comportement en déclenchement libre . 50
4.8 Influence de la position de montage . 52
4.9 Performances électriques . 52
5 Caractéristiques des DPE . 52
5.1 Liste des caractéristiques . 52
5.2 Grandeurs assignées . 52

5.3 Valeurs normales et valeurs préférentielles . 56
6 Marquage et autres informations sur le produit . 58
7 Conditions normales de fonctionnement en service . 60
7.1 Température ambiante de l'air . 60
7.2 Altitude . 60
7.3 Conditions atmosphériques . 62
8 Prescriptions de construction et de fonctionnement . 62
8.1 Conception mécanique . 62
8.2 Protection contre les chocs électriques . 86
8.3 Echauffement . 86
8.4 Propriétés diélectriques . 88
8.5 Conditions de fonctionnement automatique . 90

60934  IEC:2000+A1:2007 – 3 –

CONTENTS
FOREWORD . 11

1 Scope . 15

2 Normative references . 15

3 Definitions . 19

3.1 Definitions related to protection and switching devices . 19

3.2 General terms . 21

3.3 Definitions related to current . 23
3.4 Definitions related to voltage . 25
3.5 Definitions related to constructional elements of a CBE . 27
3.6 Definitions related to releases in CBEs . 29
3.7 Definitions related to insulation and clearances in a CBE . 31
3.8 Definitions related to operation of CBEs . 35
3.9 Definitions related to the operating characteristic of CBEs. 39
3.10 Definitions related to characteristic quantities . 39
3.11 Definitions concerning coordination of CBEs and SCPDs associated
in the same circuit . 41
3.12 Definitions related to terminals and terminations . 43
3.13 Definitions related to tests . 49
4 Classification . 49
4.1 Quantity of poles . 49
4.2 Method of mounting . 49
4.3 Method of connection . 49
4.4 Method of operation . 51
4.5 Mode of tripping . 51
4.6 Influence of the ambient temperature . 51
4.7 Trip-free behaviour . 51
4.8 Influence of the mounting position . 53
4.9 Electrical performance . 53
5 Characteristics of CBEs . 53
5.1 List of characteristics . 53
5.2 Rated quantities . 53

5.3 Standard and preferred values . 57
6 Marking and other product information. 59
7 Standard conditions for operation in service . 61
7.1 Ambient air temperature . 61
7.2 Altitude . 61
7.3 Atmospheric conditions . 63
8 Requirements for construction and operation . 63
8.1 Mechanical design . 63
8.2 Protection against electric shock . 87
8.3 Temperature-rise . 87
8.4 Dielectric properties . 89
8.5 Conditions for automatic operation . 91

– 4 – 60934 © CEI:2000+A1:2007

8.6 Performances électriques . 94

8.7 Performances dans les conditions de courant conditionnel de court-circuit . 94

8.8 Résistance aux secousses et aux chocs mécaniques . 94

8.9 Résistance à la chaleur. 94

8.10 Résistance à la chaleur anormale et au feu . 94

8.11 Résistance aux courants de cheminement . 94

8.12 Résistance à la rouille. 96

9 Essais . 98

9.1 Essais de type et séquences d'essai . 98

9.2 Conditions d'essai . 100
9.3 Essai de l'indélébilité du marquage . 102
9.4 Essai de sûreté des bornes, parties conduisant le courant et connexions . 102
9.5 Essai de la sûreté des bornes pour conducteurs externes (voir 3.12.15) . 108
9.6 Essai pour la protection contre les chocs électriques . 112
9.7 Essai des propriétés diélectriques . 112
9.8 Essai d'échauffement . 120
9.9 Essai de 28 jours . 122
9.10 Essai de la caractéristique de déclenchement . 122
9.11 Vérification des performances électriques . 124
9.12 Essais au courant conditionnel de court-circuit . 132
9.13 Essai de résistance aux secousses et aux chocs mécaniques . 138
9.14 Essai de résistance à la chaleur . 138
9.15 Résistance à la chaleur anormale et au feu . 140
9.16 Essai de résistance aux courants de cheminement . 140
9.17 Essai de résistance à la rouille . 142

Annexe A (normative) Zone temps-courant . 154
Annexe B (normative) Détermination des distances d'isolement dans l'air et
des lignes de fuite . 156
Annexe C (normative) Séquences d'essais et nombre d'échantillons à essayer en vue
de la certification . 160
Annexe D (normative) Correspondance entre les conducteurs cuivre ISO et AWG . 166
Annexe E (normative) Exemples de bornes . 168
Annexe F (informative) Coordination entre DPE et DPCC associés dans le même circuit . 186
Annexe G (normative) Comportement électromagnétique des DPE . 212

Annexe H (normative) Corrélation entre la tension nominale du système d'alimentation et
la tension phase-neutre correspondante pour déterminer la tension de choc assignée . 216
Annexe J (normative) Essais individuels ou statistiques . 218
Annexe K (normative) Prescriptions supplémentaires pour les performances électriques
des DPE de type E . 222
Annexe L (normative) Prescriptions supplémentaires pour les DPE
aptes au sectionnement . 224

Bibliographie . 232

60934  IEC:2000+A1:2007 – 5 –

8.6 Electrical performance . 95

8.7 Performance under conditional short-circuit current conditions . 95

8.8 Resistance to mechanical shock and impact . 95

8.9 Resistance to heat . 95

8.10 Resistance to abnormal heat and to fire . 95

8.11 Resistance to tracking . 95

8.12 Resistance to rusting . 97

9 Tests . 99

9.1 Type tests and sequences . 99

9.2 Test conditions . 101
9.3 Test of indelibility of marking . 103
9.4 Test of reliability of terminals, current-carrying parts and connections . 103
9.5 Test of reliability of terminals for external conductors (see 3.12.15) . 109
9.6 Test of protection against electric shock . 113
9.7 Test of dielectric properties . 113
9.8 Test of temperature-rise . 121
9.9 28-day test . 123
9.10 Test of tripping characteristics . 123
9.11 Verification of electrical operational capability . 125
9.12 Conditional short-circuit tests . 133
9.13 Test of resistance to mechanical shock and impact . 139
9.14 Tests of resistance to heat . 139
9.15 Test of resistance to abnormal heat and to fire . 141
9.16 Test of resistance to tracking. 141
9.17 Test of resistance to rusting . 143

Annex A (normative) Time-current zone . 155
Annex B (normative) Determination of clearances and creepage distances . 157
Annex C (normative) Test sequences and number of samples to be submitted
for certification purposes. 161
Annex D (normative) Correspondence between ISO and AWG copper conductors . 167
Annex E (normative) Examples of terminals . 169
Annex F (informative) Coordination between a CBE and a short-circuit protective
device (SCPD) associated in the same circuit . 187

Annex G (normative) Electromagnetic behaviour of CBEs . 213
Annex H (normative) Correlation between nominal voltage of the supply systems and
the line-to-neutral voltage relevant for determining the rated impulse voltage . 217
Annex J (normative) Routine or statistical tests . 219
Annex K (normative) Additional requirements for electrical performance
of E-type CBEs . 223
Annex L (normative) Additional requirements for CBEs suitable for isolation . 225

Bibliography . 233

– 6 – 60934 © CEI:2000+A1:2007

Figure 1 – Vis autotaraudeuse par déformation . 144

Figure 2 – Vis autotaraudeuse avec découpe. 144

Figures 3 à 6 – Circuits d'essai pour essais de surintensité . 146

Figure 7 – Doigt d'épreuve . 148

Figure 8 – Appareil pour l'essai à la bille . 150

Figure 9 – Dispositions et dimensions des électrodes pour l'essai de résistance

aux courants de cheminement . 150

Figures 10 à 13 – Circuits d'essai pour la vérification du courant conditionnel

en court-circuit . 152

Figures A.1 à A.4 . 154
Figures B.1 à B.10 . 158
Figure E.1 – Exemples de bornes à trou . 168
Figure E.2 – Exemples de bornes à serrage sous tête de vis et bornes à goujon fileté . 170
Figure E.3 – Exemples de bornes à plaquette . 172
Figure E.4 – Exemples de bornes pour cosses et barrettes . 172
Figure E.5 – Exemples de dispositifs de connexion sans vis . 174
Figure E.6 – Dimensions des languettes . 176
Figure E.7 – Dimensions de l'empreinte sphérique du dispositif de verrouillage
des languettes . 178
Figure E.8 – Dimensions de l'empreinte rectangulaire du dispositif de verrouillage
des languettes . 178
Figure E.9 – Dimensions du trou du dispositif de verrouillage des languettes . 178
Figure E.10 – Dimensions des languettes . 180
Figure E.11 – Dimensions des languettes . 180
Figure E.12 – Dimensions des languettes . 180
Figure E.13 – Dimension des languettes acceptant deux tailles différentes de clips. 182
Figure E.14 – Dimensions des clips pour languettes . 184
Figure F.1 – DPE thermique uniquement, accompagné d'un disjoncteur magnétothermique . 198
Figure F.2 – DPE thermique uniquement, accompagné d'un fusible . 200
Figure F.3 – DPE magnétothermique accompagné d'un disjoncteur magnétothermique . 202
Figure F.4 – DPE magnéto-hydraulique accompagné d'un disjoncteur magnéto-thermique . 204
Figure F.5 – DPE thermique accompagné d'un disjoncteur magnéto-hydraulique . 204

Figure F.6 – DPE limiteur, accompagné d'un disjoncteur magnétothermique . 206
Figure F.7 – DPE limiteur, accompagné d'un fusible . 208
Figure F.8 – Exemples illustrant des coordinations correctes et incorrectes . 210

Tableau 1 – Distances d'isolement minimales pour l'isolation principale et
l'isolation renforcée . 66
Tableau 2 – Lignes de fuite minimales . 70
Tableau 3 – Sections raccordables de conducteurs externes en cuivre pour les bornes
à vis et sans vis . 74
Tableau 4 – Distance minimale entre la vis de serrage et l'extrémité du conducteur
introduit à fond . 78
Tableau 5 – Dimensions des languettes en millimètres –
Dimensions A, B, C, D, E, F, J, M, N, P et Q . 82

60934  IEC:2000+A1:2007 – 7 –

Figure 1 – Thread-forming screw . 145

Figure 2 – Thread-cutting screw . 145

Figures 3 to 6 – Test circuits for overcurrent tests . 147

Figure 7 – Standard test finger. 149

Figure 8 – Ball pressure apparatus . 151

Figure 9 – Arrangements and dimensions of the electrodes for the tracking test . 151

Figures 10 to 13 – Test circuits for verification of the conditional short-circuit current . 153

Figures A.1 to A.4 . 155

Figures B.1 to B.10 . 159
Figure E.1 – Examples of pillar terminals . 169
Figure E.2 – Examples of screw terminals and stud terminals . 171
Figure E.3 – Examples of saddle terminals . 173
Figure E.4 – Examples of lug terminals . 173
Figure E.5 – Examples of screwless terminals with clamping means . 175
Figure E.6 – Dimensions of male tabs . 177
Figure E.7 – Dimensions of round dimple detents of male tabs (see figure E.6) . 179
Figure E.8 – Dimensions of rectangular dimple detents of male tabs . 179
Figure E.9 – Dimensions of hole detents of male tabs . 179
Figure E.10 – Dimensions of male tabs . 181
Figure E.11 – Dimensions of male tabs . 181
Figure E.12 – Dimensions of male tabs . 181
Figure E.13 – Dimensions of male tabs for two different sizes of female connectors . 183
Figure E.14 – Dimensions of female connectors for male tabs . 185
Figure F.1 – Thermal only CBE, backed up by thermal magnetic circuit-breaker . 199
Figure F.2 – Thermal only CBE, backed up by a fuse . 201
Figure F.3 – Thermal-magnetic CBE backed up by thermal-magnetic circuit-breaker . 203
Figure F.4 – Hydraulic-magnetic CBE backed up by thermal-magnetic circuit-breaker. 205
Figure F.5 – Thermal CBE backed up by a hydraulic-magnetic circuit-breaker . 205
Figure F.6 – Energy-limiting CBE, backed up by thermal-magnetic circuit-breaker . 207
Figure F.7 – Energy-limiting CBE, backed up by a fuse . 209
Figure F.8 – Examples illustrating proper and improper coordination . 211

Table 1 – Minimum clearances for basic and reinforced insulation . 67
Table 2 – Minimum creepage distances . 71
Table 3 – Connectable cross-sectional areas of external copper conductors
for screw type and screwless terminals . 75
Table 4 – Minimum distance between clamping screw and the end of conductor
when fully inserted . 79
Table 5 – Dimensions of tabs in millimetres –
Dimensions A, B, C, D, E, F, J, M, N, P and Q . 83

– 8 – 60934 © CEI:2000+A1:2007

Tableau 6 – Dimensions des languettes en millimètres –

Dimensions H, I, T, K, R, G, L, S et U . 84

Tableau 7 – Dimensions des languettes combinées acceptant deux tailles différentes

de clips . 84

Tableau 8 – Valeurs d'échauffement des DPE pour des températures ambiantes de l'air
de référence différentes (T) . 88

Tableau 9 – Caractéristiques de fonctionnement temps-courant . 90

Tableau 10 – Limites de fonctionnement des déclencheurs à manque de tension et

à tension zéro (pour courants alternatif et continu) . 92

Tableau 11 – Conditions d'essai pour les performances électriques des DPE destinés à

un usage général, circuits inductifs inclus . 96
Tableau 12 – Conditions d'essai pour les performances électriques des DPE utilisés
seulement dans des circuits essentiellement résistifs . 98
Tableau 13 – Liste des essais de type . 98
Tableau 14 – Sections normales de conducteurs en cuivre correspondant
aux courants assignés . 100
Tableau 15 – Diamètre des filetages et couples à appliquer . 104
Tableau 16 – Forces d'insertion et de retrait . 106
Tableau 17 – Forces de traction et de poussée . 108
Tableau 18 – Forces de traction . 110
Tableau 19 – Composition des conducteurs pour l'essai de 9.5.3 . 110
Tableau 20 – Tensions d'essai . 116
Tableau 21 – Ondes de tension pour la vérification de la coordination de l'isolement . 120
Tableau 22 – Facteur de puissance et constante de temps du circuit d'essai . 132
Tableau C.1 – Séquences d'essais . 160
Tableau C.2 – Nombre d'échantillons pour la procédure d'essai complète . 162
Tableau C.3 – Nombre réduit d'échantillons pour la procédure d'essai simplifiée . 164
Tableau D.1 – Correspondance entre sections des conducteurs ISO et AWG . 166
Tableau G.2.2 – Performances d'immunité minimales en CEM des DPE . 214

Tableau H.1 – Tensions nominales et tensions de choc assignées correspondantes . 216
Tableau L.1 – Distances d'isolement minimales pour les DPE aptes au sectionnement,
entre des parties actives séparées lorsque les contacts sont en position d'ouverture,
en fonction de la tension assignée de tenue aux chocs . 226
Tableau L.2 – Lignes de fuite minimales pour les DPE aptes au sectionnement, entre

des parties actives séparées lorsque les contacts sont en position d'ouverture . 226
Tableau L.3 – Tensions d'essai pour la vérification du sectionnement à travers
les contacts ouverts, en fonction de la tension de choc assignée et de l'altitude
à laquelle est effectué l'essai. 230

60934  IEC:2000+A1:2007 – 9 –

Table 6 – Dimensions of tabs in millimetres –

Dimensions H, I, T, K, R, G, L, S and U . 85

Table 7 – Dimensions in millimetres of combined male tabs for two different sizes

of female connectors . 85

Table 8 – Temperature-rise values for CBEs for different reference
ambient air temperatures (T) . 89

Table 9 – Time-current operating characteristics . 91

Table 10 – Operating limits of undervoltage and zero-voltage releases (for a.c. and d.c.) . 93

Table 11 – Test conditions for electrical performance for CBEs intended for general use,

including inductive circuits . 97

Table 12 – Test conditions for electrical performance of CBEs used in essentially
resistive circuits only . 99
Table 13 – List of type tests . 99
Table 14 – Standard cross-sections of copper conductors corresponding to
the rated currents . 101
Table 15 – Screw-thread diameter and applied torques . 105
Table 16 – Insertion and withdrawal forces . 107
Table 17 – Push/pull force . 109
Table 18 – Pulling forces . 111
Table 19 – Make-up of conductors for the test of 9.5.3 . 111
Table 20 – Test voltages . 117
Table 21 – Impulse withstand test voltages for verification of insulation coordination . 121
Table 22 – Power factor and time constant of test circuit . 133
Table C.1 – Test sequences . 161
Table C.2 – Number of samples for full test procedure . 163
Table C.3 – Reduction of samples for simplified test procedure . 165
Table D.1 – Correspondence between ISO and AWG conductor cross-sections . 167
Table G.2.2 – Minimum EMC immunity performances of CBEs . 215
Table H.1 – Nominal voltages and corresponding rated impulse voltages. 217
Table L.1 – Minimum clearances for CBEs suitable for isolation, between live parts
separated when the contacts are in the open position, as a function of the rated impulse
withstand voltage . 227
Table L.2 – Minimum creepage distances for CBEs suitable for isolation,
between live parts separated when the contacts are in the open position . 227

Table L.3 – Test voltages for verifying isolation across the open contacts,
as a function of the rated impulse withstand voltage and the altitude where
the test is carried out . 231

– 10 – 60934 © CEI:2000+A1:2007

COMMISSION ÉLECTROTECHNIQUE INTERNATIONALE

____________
DISJONCTEURS POUR ÉQUIPEMENT (DPE)

AVANT-PROPOS
1) La Commission Electrotechnique Internationale (CEI) est une organisation mondiale de normalisation composée
de l'ensemble des comités électrotechniques nationaux (Comités nationaux de la CEI). La CEI a pour objet de

favoriser la coopération internationale pour toutes les questions de normalisation dans les domaines de
l'électricité et de l'électronique. A cet effet, la CEI – entre autres activités – publie des Normes internationales,
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conditions fixées par accord entre les deux organisations.
2) Les décisions ou accords officiels de la CEI concernant les questions techniques représentent, dans la mesure
du possible, un accord international sur le
...

IEC 60934 ®
Edition 3.2 2013-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Circuit-breakers for equipment (CBE)

Disjoncteurs pour équipement (DPE)

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IEC 60934 ®
Edition 3.2 2013-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Circuit-breakers for equipment (CBE)

Disjoncteurs pour équipement (DPE)

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.120.40; 29.120.50 ISBN 978-2-8322-0571-6

– 2 – 60934  IEC:2000+A1:2007+A2:2013

CONTENTS
FOREWORD . 6

1 Scope . 8

2 Normative references . 9

3 Definitions . 10

3.1 Definitions related to protection and switching devices . 10

3.2 General terms . 11

3.3 Definitions related to current . 12
3.4 Definitions related to voltage . 13
3.5 Definitions related to constructional elements of a CBE . 13
3.6 Definitions related to releases in CBEs . 15
3.7 Definitions related to insulation and clearances in a CBE . 16
3.8 Definitions related to operation of CBEs . 18
3.9 Definitions related to the operating characteristic of CBEs. 19
3.10 Definitions related to characteristic quantities . 19
3.11 Definitions concerning coordination of CBEs and SCPDs associated
in the same circuit . 20
3.12 Definitions related to terminals and terminations . 21
3.13 Definitions related to tests . 23
4 Classification . 24
4.1 Quantity of poles . 24
4.2 Method of mounting . 24
4.3 Method of connection . 24
4.4 Method of operation . 24
4.5 Mode of tripping . 24
4.6 Influence of the ambient temperature . 25
4.7 Trip-free behaviour . 25
4.8 Influence of the mounting position . 25
4.9 Electrical performance . 25
5 Characteristics of CBEs . 25
5.1 List of characteristics . 25
5.2 Rated quantities . 26

5.3 Standard and preferred values . 27
6 Marking and other product information. 28
7 Standard conditions for operation in service . 29
7.1 Ambient air temperature . 29
7.2 Altitude . 29
7.3 Atmospheric conditions . 30
8 Requirements for construction and operation . 30
8.1 Mechanical design . 30
8.2 Protection against electric shock . 42
8.3 Temperature-rise . 42
8.4 Dielectric properties . 43
8.5 Conditions for automatic operation . 44

60934  IEC:2000+A1:2007+A2:2013 – 3 –

8.6 Electrical performance and behaviour at rated short-circuit capacity . 46

8.7 Performance under conditional short-circuit current conditions . 46

8.8 Resistance to mechanical shock and impact . 46

8.9 Resistance to heat . 46

8.10 Resistance to abnormal heat and to fire . 46

8.11 Resistance to tracking . 46

8.12 Resistance to rusting . 47

9 Tests . 48

9.1 Type tests and sequences . 48

9.2 Test conditions . 49
9.3 Test of indelibility of marking . 50
9.4 Test of reliability of terminals, current-carrying parts and connections . 50
9.5 Test of reliability of terminals for external conductors (see 3.12.15) . 53
9.6 Test of protection against electric shock . 54
9.7 Test of dielectric properties . 55
9.8 Test of temperature-rise . 58
9.9 28-day test . 59
9.10 Test of tripping characteristics . 59
9.11 Verification of electrical operational capability . 60
9.12 Conditional short-circuit tests . 64
9.13 Test of resistance to mechanical shock and impact . 67
9.14 Tests of resistance to heat . 67
9.15 Test of resistance to abnormal heat and to fire . 68
9.16 Test of resistance to tracking. 68
9.17 Test of resistance to rusting . 69

Annex A (normative) Time-current zone . 75
Annex B (normative) Determination of clearances and creepage distances . 76
Annex C (normative) Test sequences and number of samples to be submitted
for certification purposes. 78
Annex D (normative) Correspondence between ISO and AWG copper conductors . 81
Annex E (normative) Examples of terminals . 82
Annex F (informative) Coordination between a CBE and a short-circuit protective
device (SCPD) associated in the same circuit . 91

Annex G (normative) Electromagnetic behaviour of CBEs . 104
Annex H (normative) Correlation between nominal voltage of the supply systems and
the line-to-neutral voltage relevant for determining the rated impulse voltage . 106
Annex J (normative) Routine or statistical tests . 107
Annex K (normative) Additional requirements for electrical performance
of E-type CBEs . 109
Annex L (normative) Additional requirements for CBEs suitable for isolation . 110

Bibliography . 114

– 4 – 60934  IEC:2000+A1:2007+A2:2013

Figure 1 – Thread-forming screw . 70

Figure 2 – Thread-cutting screw . 70

Figures 3 to 6 – Test circuits for overcurrent tests . 71

Figure 7 – Standard test finger. 72

Figure 8 – Ball pressure apparatus . 73

Figure 9 – Arrangements and dimensions of the electrodes for the tracking test . 73

Figures 10 to 13 – Test circuits for verification of the conditional short-circuit current . 74

Figures A.1 to A.4 . 75

Figures B.1 to B.10 . 77
Figure E.1 – Examples of pillar terminals . 82
Figure E.2 – Examples of screw terminals and stud terminals . 83
Figure E.3 – Examples of saddle terminals . 84
Figure E.4 – Examples of lug terminals . 84
Figure E.5 – Examples of screwless terminals with clamping means . 85
Figure E.6 – Dimensions of male tabs . 86
Figure E.7 – Dimensions of round dimple detents of male tabs (see figure E.6) . 87
Figure E.8 – Dimensions of rectangular dimple detents of male tabs . 87
Figure E.9 – Dimensions of hole detents of male tabs . 87
Figure E.10 – Dimensions of male tabs . 88
Figure E.11 – Dimensions of male tabs . 88
Figure E.12 – Dimensions of male tabs . 88
Figure E.13 – Dimensions of male tabs for two different sizes of female connectors . 89
Figure E.14 – Dimensions of female connectors for male tabs . 90
Figure F.1 – Thermal only CBE, backed up by thermal magnetic circuit-breaker . 97
Figure F.2 – Thermal only CBE, backed up by a fuse . 98
Figure F.3 – Thermal-magnetic CBE backed up by thermal-magnetic circuit-breaker . 99
Figure F.4 – Hydraulic-magnetic CBE backed up by thermal-magnetic circuit-breaker. 100
Figure F.5 – Thermal CBE backed up by a hydraulic-magnetic circuit-breaker . 100
Figure F.6 – Energy-limiting CBE, backed up by thermal-magnetic circuit-breaker . 101
Figure F.7 – Energy-limiting CBE, backed up by a fuse . 102
Figure F.8 – Examples illustrating proper and improper coordination . 103

Table 1 – Minimum clearances for basic and reinforced insulation . 32
Table 2 – Minimum creepage distances . 34
Table 3 – Connectable cross-sectional areas of external copper conductors
for screw type and screwless terminals . 36
Table 4 – Minimum distance between clamping screw and the end of conductor
when fully inserted . 37
Table 5 – Dimensions of tabs in millimetres –
Dimensions A, B, C, D, E, F, J, M, N, P and Q . 40

60934  IEC:2000+A1:2007+A2:2013 – 5 –

Table 6 – Dimensions of tabs in millimetres –

Dimensions H, I, T, K, R, G, L, S and U . 41

Table 7 – Dimensions in millimetres of combined male tabs for two different sizes

of female connectors . 41

Table 8 – Temperature-rise values for CBEs for different reference
ambient air temperatures (T) . 43

Table 9 – Time-current operating characteristics . 44

Table 10 – Operating limits of undervoltage and zero-voltage releases (for a.c. and d.c.) . 45

Table 11 – Test conditions for electrical performance for CBEs intended for general use,

including inductive circuits . 47

Table 12 – Test conditions for electrical performance of CBEs used in essentially
resistive circuits only . 48
Table 13 – List of type tests . 49
Table 14 – Standard cross-sections of copper conductors corresponding to
the rated currents . 50
Table 15 – Screw-thread diameter and applied torques . 51
Table 16 – Insertion and withdrawal forces . 52
Table 17 – Push/pull force . 53
Table 18 – Pulling forces . 53
Table 19 – Make-up of conductors for the test of 9.5.3 . 54
Table 20 – Test voltages . 57
Table 21 – Impulse withstand test voltages for verification of insulation coordination . 58
Table 22 – Power factor and time constant of test circuit . 65
Table C.1 – Test sequences . 78
Table C.2 – Number of samples for full test procedure . 79
Table C.3 – Reduction of samples for simplified test procedure . 80
Table D.1 – Correspondence between ISO and AWG conductor cross-sections . 81
Table G.2.2 – Minimum EMC immunity performances of CBEs . 105
Table H.1 – Nominal voltages and corresponding rated impulse voltages. 106
Table L.1 – Minimum clearances for CBEs suitable for isolation, between live parts
separated when the contacts are in the open position, as a function of the rated impulse
withstand voltage . 111
Table L.2 – Minimum creepage distances for CBEs suitable for isolation,
between live parts separated when the contacts are in the open position . 111

Table L.3 – Test voltages for verifying isolation across the open contacts,
as a function of the rated impulse withstand voltage and the altitude where
the test is carried out . 113

– 6 – 60934  IEC:2000+A1:2007+A2:2013

INTERNATIONAL ELECTROTECHNICAL COMMISSION

___________
CIRCUIT-BREAKERS FOR EQUIPMENT (CBE)

FOREWORD
1) The International Electrotechnical Commission (IEC) 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 to other activities, IEC publishes International Standards, Technical Specifications,
Technical 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, governmental 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 technical committee has representation from all
interested IEC National 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 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 IEC 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. 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 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 other 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 the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 60934 has been prepared by subcommittee 23E: Circuit-breakers
and similar equipment for household use, of IEC technical committee 23: Electrical
accessories.
This consolidated version of IEC 60934 consists of the third edition (2000) [documents
23E/430/FDIS and 23E/441/RVD], its amendment 1 (2007) [documents 23E/624/FDIS and
23E/627/RVD] and its amendment 2 (2013) [documents 23E/767/FDIS and 23E/774/RVD].
The technical content is therefore identical to the base edition and its amendments and has
been prepared for user convenience.
It bears the edition number 3.2.
A vertical line in the margin shows where the base publication has been modified by
amendments 1 and 2.
Annexes A, B, C, D, E, G, H, J, K and L form an integral part of this standard.
Annex F is for information only.

60934  IEC:2000+A1:2007+A2:2013 – 7 –

In this standard, the following print types are used:

– Requirements proper: in roman type

– Test specifications: in italic type

– Explanatory matter: in smaller roman type.

The committee has decided that the contents of the base publication and its amendments will
remain unchanged until the stability date indicated on the IEC web site under

"http://webstore.iec.ch" in the data related to the specific publication. At this date, the

publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
– 8 – 60934  IEC:2000+A1:2007+A2:2013

CIRCUIT-BREAKERS FOR EQUIPMENT (CBE)

1 Scope
This International Standard is applicable to mechanical switching devices designed as "circuit-

breakers for equipment" (CBE) for household and similar applications. CBEs according to this

standard are intended to provide protection to circuits within electrical equipment including its

components (e.g. motors, transformers, internal wiring). This standard covers also CBEs

applicable for protection of electrical equipment in case of undervoltage and/or overvoltage.

This standard also covers CBEs which are suitable for isolation.
NOTE The term "equipment" includes appliances.
CBEs are not applicable for overcurrent protection of wiring installations of buildings.
CBEs according to this standard have:
– a rated voltage not exceeding 440 V a.c. (between phases) and/or d.c. not exceeding
250 V;
– a rated current not exceeding 125 A;
– a short-circuit capacity (I ) of at least 6xI (a.c types) and 4xI (d.c.-types) but not
cn n n
exceeding 3 000 A.
CBEs may have a conditional short-circuit current rating in association with a specified short-
circuit protective device (SCPD). A guide for coordination of a CBE associated in the same
circuit with a SCPD is given in Annex F.
For CBEs having a degree of protection higher than IP20 according to IEC 60529, for use in
locations where hazardous environmental conditions prevail (e.g. excessive humidity, heat or
cold or deposition of dust) and in hazardous locations (e.g. where explosions are liable to
occur), special constructions may be required.
This standard contains all the requirements necessary to ensure compliance with the
operational characteristics required for these devices by type tests. It also contains the details
relative to test requirements and methods of testing necessary to ensure reproducibility of test
results.
This standard states:
a) the characteristics of CBEs;

b) the conditions with which CBEs shall comply, with reference to:
1) their operation and behaviour in normal service;
2) their operation and behaviour in case of overload;
3) their operation and behaviour in case of short-circuits up to their rated short-circuit
capacity;
4) their dielectric properties;
c) the tests intended for confirming that these conditions have been met and the methods to
be adopted for the tests;
d) the data to be marked on the devices;
e) the test sequences to be carried out and the number of samples to be submitted for
certification purposes (see Annex C);
f) the routine tests to be carried out to reveal unacceptable variations in material or
manufacture, likely to affect safety (see Annex J).

60934  IEC:2000+A1:2007+A2:2013 – 9 –

2 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 60050(151):1978, International Electrotechnical Vocabulary (IEV) – Chapter 151:

Electrical and magnetic devices

IEC 60050(441):1984, International Electrotechnical Vocabulary (IEV) – Chapter 441:
Switchgear, controlgear and fuses
IEC 60050(604):1987, International Electrotechnical Vocabulary (IEV) – Chapter 604:
Generation, transmission and distribution of electricity – Operation
IEC 60050(826):1982, International Electrotechnical Vocabulary (IEV) – Chapter 826:
Electrical installations of buildings
Amendment 1 (1990)
Amendment 2 (1995)
Amendment 3 (1999)
IEC 60060-1:1989, High-voltage test techniques – Part 1: General definitions and test
requirements
IEC 60068-2-20:1979, Environmental testing – Part 2: Tests – Test T: Soldering
IEC 60099-1:1991, Surge arresters – Part 1: Non-linear resistor type gapped arresters for a.c.
1)
systems
IEC 60227 (all parts), Polyvinyl chloride insulated cables of rated voltages up to and including
450/750 V
IEC 60269 (all parts), Low-voltage fuses
IEC 60417-1:1998, Graphical symbols for use on equipment – Part 1: Overview and
application
IEC 60529:1989, Degrees of protection provided by enclosures (IP Code)
IEC 60664 (all parts), Insulation coordination for equipment within low-voltage systems
IEC 60664-1:1992, Insulation coordination for equipment within low-voltage systems – Part 1:
Principles, requirements and tests

IEC 60664-3:1992, Insulation coordination for equipment within low-voltage systems – Part 3:
Use of coatings to achieve insulation coordination of printed board assemblies
IEC 60695-2-1 (all sheets), Fire hazard testing – Part 2: Test methods – Section 1: Glow-wire
test methods
IEC 60898:1995, Electrical accessories – Circuit-breakers for overcurrent protection for
household and similar installations
IEC 60947-1:1999, Low-voltage switchgear and controlgear – Part 1: General rules
IEC 60950:1999, Safety of information technology equipment
IEC 61000-4-2:1995, Electromagnetic compatibility (EMC) – Part 4: Testing and measurement
2)
techniques – Section 2: Electrostatic discharge immunity test – Basic EMC Publication
———————
1)
There is a consolidated edition 3.1 (1999) that includes IEC 60099-1 (1991) and its amendment 1 (1999).
2)
There is a consolidated edition 1.1 (1999) that includes IEC 61000-4-2 (1995) and its amendment 1 (1998).

– 10 – 60934  IEC:2000+A1:2007+A2:2013

IEC 61000-4-3:1995, Electromagnetic compatibility (EMC) – Part 4: Testing and measurement

techniques – Section 3: Radiated, radio-frequency, electromagnetic field immunity test

IEC 61000-4-4:1995, Electromagnetic compatibility (EMC) – Part 4: Testing and measurement

techniques – Section 4: Electrical fast transient/burst immunity test – Basic EMC Publication

IEC 61000-4-5:1995, Electromagnetic compatibility (EMC) – Part 4: Testing and measurement

techniques – Section 5: Surge immunity test

CISPR 22:1997, Information technology equipment – Radio disturbance characteristics –
Limits and methods of measurement

3 Definitions
For the purposes if this International standard, the following definitions apply.
3.1 Definitions related to protection and switching devices
3.1.1
circuit-breaker
mechanical switching device, capable of making, carrying and breaking currents under normal
circuit conditions and also making, carrying for a specified time and breaking currents under
specified abnormal conditions such as those of short circuit [IEV 441-14-20]
3.1.2
circuit-breaker for equipment (CBE)
circuit-breaker specifically designed for the protection of equipment
NOTE These CBEs are intended for:
– automatic interruption and non-automatic or automatic resetting;
– automatic interruption and non-automatic or automatic resetting and manual switching operation.
3.1.3
E-type CBE
void
3.1.4
fuse
device that, by the fusing of one or more of its specially designed and proportioned
components, opens the circuit in which it is inserted by breaking the current when this
exceeds a given value for a sufficient time. The fuse comprises all of the parts that form the
complete device [IEV 441-18-01]

3.1.5
switching device
device designed to make or break the current in one or more electric circuits [IEV 441-14-01]
3.1.6
mechanical switching device
switching device designed to close and open one or more electric circuits by means of
separable contacts [IEV 441-14-02]
3.1.7
switch (mechanical)
mechanical switching device capable of making, carrying and breaking currents under normal
circuit conditions which may include specified operating overload conditions and also carrying
for a specified time currents under specified abnormal circuit conditions such as those of
short circuit [IEV 441-14-10]
60934  IEC:2000+A1:2007+A2:2013 – 11 –

3.1.8
disconnector
mechanical switching device which in the open position complies with the requirements

specified for the isolating function [IEV 441-14-05, modified]

3.1.9
disconnection
interruption of an electrical circuit in a pole so as to provide insulation between the supply and

those parts intended to be disconnected from the supply

3.1.10
full-disconnection
disconnection that provides the equivalent of basic insulation by contact separation
3.1.11
micro-disconnection
disconnection that provides compliance of performance by contact separation
3.1.12
isolation (isolating function)
function intended to cut off the supply from all or a discrete section of the installation by
separating the installation from every source of electrical energy for reasons of safety
3.2 General terms
3.2.1
ambient air temperature
temperature, determined under prescribed conditions, of the air surrounding the complete
CBE (for example, for an enclosed CBE, it is the air outside the enclosure) [IEV 441-11-13,
modified]
3.2.2
applied voltage
voltage which exists across the terminals of a pole of a CBE just before the making of the
current. In the case of a.c., it is the r.m.s. value [IEV 441-17-24, modified]
3.2.3
main circuit (of a CBE)
all the conductive parts of a CBE included in the circuit which it is designed to close and to
open [IEV 441-15-02, modified]
3.2.4
control circuit (of a CBE)
circuit (other than a path of the main circuit) intended for the closing operation or opening
operation, or both, of a CBE [IEV 441-15-03, modified]
3.2.5
auxiliary circuit (of a CBE)
all the conductive parts of a CBE intended to be included in a circuit other than the main
circuit and the control circuit of the CBE [IEV 441-15-04, modified]
3.2.6
pole (of a CBE)
that part of a CBE associated exclusively with one, electrically separated, conducting path of
its main circuit provided with contacts intended to connect and disconnect the main circuit
itself and excluding those portions which provide a means for mounting and operating the
poles together [IEV 441-15-01, modified]

– 12 – 60934  IEC:2000+A1:2007+A2:2013

3.2.7
protected pole
pole provided with an overcurrent release (see 3.6.2)

3.2.8
unprotected pole
pole without overcurrent release (see 3.6.2) but otherwise generally capable of the same

performance as a protected pole of the same CBE

3.2.9
neutral conductor (symbol N)
conductor connected to the neutral point of a system and capable of contributing to the
transmission of electrical energy [IEV 826-01-03]
3.2.10
closed position
position in which the predetermined continuity of the main circuit of a CBE is secured
[IEV 441-16-22, modified]
3.2.11
open position
position in which the predetermined clearance between open contacts in the main circuit of a
CBE is provided [IEV 441-16-23, modified]
3.2.12
incorporated mounting
method of mounting where the user provides in his equipment a cavity to fix the CBE in its
position
3.3 Definitions related to current
3.3.1
current
flow of electric charge through a conductor
3.3.2
rated current
current assigned by the manufacturer for a specified operating condition of the CBE
3.3.3
overcurrent
current exceeding the rated current [IEV 441-11-06]

3.3.4
overload current
overcurrent that occurs in an electrically undamaged circuit
3.3.5
short-circuit current
overcurrent resulting from a fault of negligible impedance between points intended to be at
different potentials in normal service [IEV 441-11-07, modified]
NOTE A short-circuit current may result from a fault or from an incorrect connection.
3.3.6
conventional tripping current I
t
specified value of current which causes a CBE to operate within a specified time
(conventional time)
60934  IEC:2000+A1:2007+A2:2013 – 13 –

3.3.7
conventional non-tripping current I
nt
specified value of current which a CBE is capable of carrying for a specified time (conventional

time) without tripping
3.3.8
instantaneous tripping current I
i
value of current for which a CBE will operate automatically (without intentional time delay)

within a time less than 0,1 s
3.3.9
instantaneous non-tripping current I
ni
value of current for which a CBE will not operate automatically without intentional time delay
within a time equal to or less than 0,1 s
3.4 Definitions related to voltage
3.4.1
rated voltage
value of voltage assigned by the manufacturer to a CBE or to its components and to which
operation and performance characteristics are referred
NOTE A CBE may have more than one rated voltage value or may have a rated voltage range.
3.4.2
working voltage
highest value of the a.c. or d.c. voltage across any particular insulation which can occur when
a CBE is supplied at rated voltage
NOTE 1 Transients are disregarded.
NOTE 2 Both open-circuit and normal operating conditions are taken into account.
3.4.3
overvoltage
any voltage having a peak value exceeding the corresponding peak value of maximum
steady-state voltage at normal operating conditions
3.4.4
temporary overvoltage
overvoltage at power frequency of relatively long duration
3.4.5
transient overvoltage
short-duration overvoltage of a few milliseconds or less, oscillatory or non-oscillatory, usually
highly damped [IEV 604-03-13]
3.4.6
temporary withstand voltage
highest value of a temporary overvoltage which does not cause breakdown of insulation under
specified conditions
3.5 Definitions related to constructional elements of a CBE
3.5.1
accessible part
part which can be touched in normal use
3.5.2
conductive part
part which is capable of conducting current although it may not necessarily be used for
carrying service current [IEV 441-11-09]

– 14 – 60934  IEC:2000+A1:2007+A2:2013

3.5.3
exposed conductive part
conductive part which can readily be touched and which is not normally alive, but which may

become alive under fault conditions [IEV 441-11-10]

NOTE Typical exposed conductive parts are walls of metal enclosures, metal operating handles, etc.

3.5.4
live part
conductor or conductive part intended to be energized in normal use, including a neutral

conductor, but, by convention, not a PEN conductor [IEV 826-03-01]

NOTE This term does not necessarily imply a risk of electric shock.

3.5.5
detachable part
part which can be removed without the aid of a general purpose tool
3.5.6
main contact
contact included in the main circuit of a CBE, intended to carry, in the closed position, the
current of the main circuit [IEV 441-15-07, modified]
3.5.7
auxiliary contact
contact included in an auxiliary circuit of a CBE and mechanically operated by the CBE
[IEV 441-15-10, modified]
3.5.8
control contact
contact included in a control circuit of a CBE and mechanically operated by the CBE
[IEV 441-15-09, modified]
3.5.9
form A contact (make contact)
control or auxiliary contact which is closed when the main contacts of a CBE are closed and
open when they are open [IEV 441-15-12, modified]
3.5.10
form B contact (break contact)
control or auxiliary contact which is open when the main contacts of a CBE are closed and
closed when they are open [IEV 441-15-13, modified]

3.5.11
form C contact (make-break contact)
control or auxil
...