IEC 60947-6-1:2005
(Main)Low-voltage switchgear and controlgear - Part 6-1: Multiple function equipment - Transfer switching equipment
Low-voltage switchgear and controlgear - Part 6-1: Multiple function equipment - Transfer switching equipment
This part of IEC 60947applies to transfer switching equipment (TSE) to be used in power systems with interruption of the supply to the load during transfer, the rated voltage of which does not exceed 1 000 V a.c. or 1 500 V d.c.
Appareillage à basse tension - Partie 6-1: Matériels à fonctions multiples - Matériels de connexion de transfert
La présente partie de la CEI 60947 est applicable aux matériels de connexion de transfert (TSE) destinés à être utilisés dans des systèmes de puissance, avec interruption de l'alimentation de la charge pendant le transfert, dont la tension assignée ne dépasse pas 1 000 V en courant alternatif ou 1 500 V en courant continu.
General Information
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Standards Content (Sample)
NORME CEI
INTERNATIONALE
IEC
60947-6-1
INTERNATIONAL
Deuxième édition
STANDARD
Second edition
2005-08
Appareillage à basse tension–
Partie 6-1:
Matériels à fonctions multiples –
Matériels de connexion de transfert
Low-voltage switchgear and controlgear –
Part 6-1:
Multiple function equipment –
Transfer switching equipment
Numéro de référence
Reference number
CEI/IEC 60947-6-1:2005
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
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NORME CEI
INTERNATIONALE
IEC
60947-6-1
INTERNATIONAL
Deuxième édition
STANDARD
Second edition
2005-08
Appareillage à basse tension–
Partie 6-1:
Matériels à fonctions multiples –
Matériels de connexion de transfert
Low-voltage switchgear and controlgear –
Part 6-1:
Multiple function equipment –
Transfer switching equipment
IEC 2005 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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Telephone: +41 22 919 02 11 Telefax: +41 22 919 03 00 E-mail: inmail@iec.ch Web: www.iec.ch
CODE PRIX
X
PRICE CODE
Commission Electrotechnique Internationale
International Electrotechnical Commission
МеждународнаяЭлектротехническаяКомиссия
Pour prix, voir catalogue en vigueur
For price, see current catalogue
– 2 – 60947-6-1 CEI:2005
SOMMAIRE
AVANT-PROPOS.6
1 Domaine d’application et objet.12
2 Références normatives.14
3 Termes et définitions, symboles et abréviations.16
3.1 Appareils de connexion .16
3.2 Manœuvre des TSE.18
3.3 Positions des contacts principaux.20
3.4 Symboles et abréviations .20
4 Classification.22
5 Caractéristiques .22
5.1 Enumération des caractéristiques.22
5.2 Type du matériel .22
5.3 Valeurs assignées et valeurs limites pour le circuit principal.22
5.4 Catégorie d'emploi .28
5.5 Circuits de commande.28
5.6 Circuits auxiliaires .30
6 Informations sur le matériel .30
6.1 Nature des informations .30
6.2 Marquage.32
6.3 Instructions d'installation, de fonctionnement et d'entretien .32
7 Conditions normales de service, de montage et de transport .32
8 Dispositions relatives à la construction et au fonctionnement .32
8.1 Dispositions constructives .32
8.2 Dispositions relatives au fonctionnement.32
8.3 Compatibilité électromagnétique (CEM).42
9 Essais .44
9.1 Nature des essais .44
9.2 Conformité aux dispositions constructives .44
9.3 Fonctionnement.46
9.4 Essais individuels.70
9.5 Essais CEM.70
Annexe A (normative) – Attribution des catégories d'emploi en fonction des résultats
d'essais .80
Annexe B (informative) – Points faisant l'objet d'un accord entre le constructeur et
l'utilisateur .84
Figure 1 – Circuit d’essai pour le raccordement aux alimentations normale et de
remplacement .76
Figure 2 – Circuit d’essai pour la vérification des pouvoirs de fermeture et de coupure
sur trois pôles .78
Figure 3 – Circuit d’essai pour la vérification des pouvoirs de fermeture et de coupure
sur deux pôles .78
60947-6-1 IEC:2005 – 3 –
CONTENTS
FOREWORD.7
1 Scope and object.13
2 Normative references .15
3 Terms and definitions, symbols and abbreviations .17
3.1 Switching devices.17
3.2 Operation of TSE.19
3.3 Main contact positions.21
3.4 Symbols and abbreviations.21
4 Classification.23
5 Characteristics .23
5.1 Summary of characteristics .23
5.2 Type of equipment.23
5.3 Rated and limiting values for the main circuit.23
5.4 Utilization category.29
5.5 Control circuits .29
5.6 Auxiliary circuits .31
6 Product information .31
6.1 Nature of information.31
6.2 Marking .33
6.3 Instructions for installation, operation and maintenance .33
7 Normal service, mounting and transport conditions.33
8 Constructional and performance requirements.33
8.1 Constructional requirements.33
8.2 Performance requirements .33
8.3 Electromagnetic compatibility (EMC) .43
9 Tests .45
9.1 Kinds of tests .45
9.2 Compliance with constructional requirements .45
9.3 Performance.47
9.4 Routine tests .71
9.5 EMC tests .71
Annex A (normative) – Assignment of utilization categories based on the results of tests .81
Annex B (informative) – Items subject to agreement between manufacturer and user .85
Figure 1 – Test circuit for connection to normal and alternative supplies.77
Figure 2 – Test circuit for the verification of making and breaking capacities on three poles .79
Figure 3 – Test circuit for the verification of making and breaking capacities on two poles .79
– 4 – 60947-6-1 CEI:2005
Tableau 1 – Catégories d'emploi.28
Tableau 2 – Vérifications des pouvoirs de fermeture et de coupure – Conditions
d'établissement et de coupure suivant les catégories d'emploi.36
Tableau 3 – Vérification du fonctionnement en service – Conditions d'établissement et
de coupure suivant les catégories d'emploi .38
Tableau 4 – Valeur du courant d'essai pour la vérification de l'aptitude au
fonctionnement en condition de court-circuit .40
Tableau 5 – Critères d'acceptation.44
Tableau 6 – Liste des essais de type (plan général des séquences d’essais).48
Tableau 7 – Liste des essais de type (avec le numéro du paragraphe correspondant)
auxquels doit être soumis un TSE dérivé .50
Tableau 8 – Nombre et durée des cycles de manœuvres pour l'essai des pouvoirs de
fermeture et de coupure.58
Tableau 9 – Nombres et durées des cycles de manœuvres pour les essais de
fonctionnement électrique et mécanique en service pour les catégories d’emploi
d’application A .62
Tableau 10 – Nombres et durées des cycles de manœuvres pour les essais de
fonctionnement électrique et mécanique en service pour les catégories d’emploi
d’application B .62
Tableau A.1 – Equivalence entre les catégories d’emploi utilisées dans certaines
normes de produit de la CEI 60947.82
60947-6-1 IEC:2005 – 5 –
Table 1 – Utilization categories .29
Table 2 – Verification of making and breaking capacity – Conditions for making and
breaking corresponding to the utilization categories.37
Table 3 – Verification of operational performance – Conditions for making and breaking
corresponding to the utilization categories .39
Table 4 – Value of the test current for the verification of the ability to operate under
short-circuit conditions.41
Table 5 – Acceptance criteria.45
Table 6 – List of type tests (overall scheme of test sequences).49
Table 7 – List of type tests (referred to by their subclause numbers) to which a given
derived TSE shall be submitted.51
Table 8 – Number and duration of operating cycles for the making and breaking
capacity test .59
Table 9 – Number and duration of operating cycles for the electrical and mechanical
operational performance tests for operation A utilization categories.63
Table 10 – Number and duration of operating cycles for the electrical and mechanical
operational performance tests for operation B utilization categories.63
Table A.1 – Equivalence between utilization categories used in some IEC 60947
product standards .83
– 6 – 60947-6-1 CEI:2005
COMMISSION ÉLECTROTECHNIQUE INTERNATIONALE
___________
APPAREILLAGE À BASSE TENSION –
Partie 6-1: Matériels à fonctions multiples –
Matériels de connexion de transfert
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
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selon des conditions fixées par accord entre les deux organisations.
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responsable de ne pas avoir identifié de tels droits de propriété et de ne pas avoir signalé leur existence.
La Norme internationale CEI 60947-6-1 a été établie par le sous-comité 17B: Appareillage à
basse tension, du comité d'études 17 de la CEI: Appareillage.
Cette deuxième édition annule et remplace la première édition parue en 1989, l’amendement
1 (1994) et l’amendement 2 (1997). Cette édition inclut l’amendement 3 qui n’a pas été publié
séparément.
Le texte de cette norme est issu de la première édition, de l’amendement 1, de l’amendement 2
et des documents suivants:
FDIS Rapport de vote
17B/1418/FDIS 17B/1424/RVD
Le rapport de vote indiqué dans le tableau ci-dessus donne toute information sur le vote ayant
abouti à l'approbation de cette norme.
60947-6-1 IEC:2005 – 7 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
___________
LOW-VOLTAGE SWITCHGEAR AND CONTROLGEAR –
Part 6-1: Multiple function equipment –
Transfer switching equipment
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,
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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
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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 provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with an IEC Publication.
6) All users should ensure that they have the latest edition of this publication.
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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 60947-6-1 has been prepared by subcommittee 17B: Low-voltage
switchgear and controlgear, of IEC technical committee 17: Switchgear and controlgear.
This second edition cancels and replaces the first edition published in 1989, amendment 1
(1994), and amendment 2 (1997). This edition incorporates Amendment 3 which was not
published separately.
The text of this standard is based on first edition, amendment 1, amendment 2 and the
following documents:
FDIS Report on voting
17B/1418/FDIS 17B/1424/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
– 8 – 60947-6-1 CEI:2005
La présente partie de la CEI 60947 doit être utilisée conjointement avec la CEI 60947-1:
Règles générales.
Les dispositions des règles générales qui font l’objet de la CEI 60947-1 sont applicables à la
présente partie de la CEI 60947 lorsque celle-ci le précise. Les articles, paragraphes,
tableaux, figures et annexes des règles générales qui sont ainsi applicables sont identifiés
par référence à la CEI 60947-1 (par exemple: 1.2.3 de la CEI 60947-1, Tableau 4 de la
CEI 60947-1 ou Annexe A de la CEI 60947-1, etc.).
Cette publication a été rédigée selon les Directives ISO/CEI, Partie 2.
La CEI 60947 comprend les parties suivantes, sous le titre général Appareillage à basse
tension:
Partie 1: Règles générales
Partie 2: Disjoncteurs
Partie 3: Interrupteurs, sectionneurs, interrupteurs-sectionneurs et combinés-fusibles
Partie 4-1: Contacteurs et démarreurs de moteurs – Contacteurs et démarreurs
électromécaniques
Partie 4-2: Contacteurs et démarreurs de moteurs – Gradateurs et démarreurs à
semiconducteurs de moteurs à courant alternatif
Partie 4-3: Contacteurs et démarreurs de moteurs – Gradateurs et contacteurs à
semiconducteurs pour charges, autres que des moteurs, à courant alternatif
Partie 5-1: Appareils et éléments de commutation pour circuits de commande – Appareils
électromécaniques pour circuits de commande
Partie 5-2: Appareils et éléments de commutation pour circuits de commande – Détecteurs
de proximité
Partie 5-3: Appareils et éléments de commutation pour circuits de commande –
Prescriptions pour dispositifs de détection de proximité à comportement défini
dans des conditions de défaut (PDF)
Partie 5-4: Appareils et éléments de commutation pour circuits de commande – Méthode
d'évaluation des performances des contacts à basse énergie – Essais spéciaux
Partie 5-5: Appareils et éléments de commutation pour circuits de commande – Appareil
d'arrêt d'urgence électrique à accrochage mécanique
Partie 5-6: Appareils et éléments de commutation pour circuits de commande – Interface à
courant continu pour capteurs de proximité et amplificateurs de commutation
(NAMUR)
Partie 5-7: Appareils et éléments de commutation pour circuits de commande –
Prescriptions pour les détecteurs de proximité à sortie analogique
Partie 5-8: Appareils et éléments de commutation pour circuit de commande – Dispositifs de
commande de validation à trois positions1
Partie 5-9: Appareils et éléments de commutation pour circuits de commande – Détecteurs
de débit1
Partie 6-1: Matériels à fonctions multiples – Matériels de connexion de transfert
automatique
Partie 6-2: Matériels à fonctions multiples – Appareils (ou matériel) de connexion de
commande de protection (ACP)
—————————
A l’étude.
60947-6-1 IEC:2005 – 9 –
This part of IEC 60947shall be used in conjunction with IEC 60947-1: General rules.
The provisions of the general rules dealt with in IEC 60947-1 are applicable to this part of
IEC 60947, where specifically called for. Clauses and subclauses, tables, figures and
annexes of the general rules thus applicable are identified by reference to IEC 60947-1 (e.g.
1.2.3 of IEC 60947-1, Table 4 of IEC 60947-1 or Annex A of IEC 60947-1, etc.).
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
IEC 60947 consists of the following parts, under the general title Low-voltage switchgear and
controlgear:
Part 1: General rules
Part 2: Circuit-breakers
Part 3: Switches, disconnectors, switch-disconnectors and fuse-combination units
Part 4-1: Contactors and motor-starters – Electromechanical contactors and motor-starters
Part 4-2: Contactors and motor-starters – AC semiconductor motor controllers and starters
Part 4-3: Contactors and motor-starters – AC semiconductor controllers and contactors for
non-motor loads
Part 5-1: Control circuit devices and switching elements – Electromechanical control circuit
devices
Part 5-2: Control circuit devices and switching elements – Proximity switches
Part 5-3: Control circuit devices and switching elements – Requirements for proximity
devices with defined behaviour under fault conditions (PDF)
Part 5-4: Control circuit devices and switching elements – Method of assessing the
performance of low-energy contacts – Special tests
Part 5-5: Control circuit devices and switching elements – Electrical emergency stop device
with mechanical latching function
Part 5-6: Control circuit devices and switching elements – DC interface for proximity
sensors and switching amplifiers (NAMUR)
Part 5-7: Control circuit devices and switching elements – Requirements for proximity
devices with analogue output
Part 5-8: Control circuit devices and switching elements – Three-position enabling switches
Part 5-9: Control circuit devices and switching elements – Flow rate switches
Part 6-1: Multiple function equipment – Automatic transfer switching equipment
Part 6-2: Multiple function equipment – Control and protective switching devices (or
equipment) (CPS)
—————————
Under consideration.
– 10 – 60947-6-1 CEI:2005
Partie 7-1: Matériels accessoires – Blocs de jonction pour conducteurs en cuivre
Partie 7-2: Matériels accessoires – Blocs de jonction de conducteur de protection pour
conducteurs en cuivre
Partie 7-3: Matériels accessoires – Prescriptions de sécurité pour les blocs de jonction à
fusible
Partie 8: Unités de commande pour la protection thermique incorporée (CTP) aux
machines électriques tournantes
Le comité a décidé que le contenu de cette publication ne sera pas modifié avant la date de
maintenance indiquée sur le site web de la CEI sous "http://webstore.iec.ch" dans les
données relatives à la publication recherchée. A cette date, la publication sera
• reconduite,
• supprimée,
• remplacée par une édition révisée, ou
• amendée.
60947-6-1 IEC:2005 – 11 –
Part 7-1: Ancillary equipment – Terminal blocks for copper conductors
Part 7-2: Ancillary equipment – Protective conductor terminal blocks for copper conductors
Part 7-3: Ancillary equipment – Safety requirements for fuse terminal blocks
Part 7-3: Ancillary equipment – Safety requirements for fuse terminal blocks
Part 8: Control units for built-in thermal protection (PTC) for rotating electrical machines
The committee has decided that the contents of this publication will remain unchanged until
the maintenance result 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.
– 12 – 60947-6-1 CEI:2005
APPAREILLAGE À BASSE TENSION –
Partie 6-1: Matériels à fonctions multiples –
Matériels de connexion de transfert
1 Domaine d’application et objet
La présente partie de la CEI 60947 est applicable aux matériels de connexion de transfert
(TSE) destinés à être utilisés dans des systèmes de puissance, avec interruption de
l'alimentation de la charge pendant le transfert, dont la tension assignée ne dépasse pas
1 000 V en courant alternatif ou 1 500 V en courant continu.
Elle concerne:
– les matériels de connexion de transfert manœuvrés manuellement (MTSE);
– les matériels de connexion de transfert manœuvrés à distance (RTSE);
– les matériels de connexion de transfert automatique (ATSE).
Elle concerne les TSE fournis avec ou sans enveloppe.
Les appareils nécessaires à la commande (par exemple auxiliaires de commande, etc.) et à la
protection (par exemple disjoncteurs, etc.) d'un TSE sont couverts par les normes
appropriées de la CEI.
NOTE Les TSE utilisés uniquement pour l'éclairage de secours peuvent faire l'objet de règles spécifiques et/ou
d’exigences réglementaires et, de ce fait, ne sont pas concernés par la présente partie de la CEI 60947.
La présente partie de la CEI 60947 a pour objet de fixer:
1) Les caractéristiques du matériel:
a) matériel spécifique;
b) matériel dont la partie principale est constituée d’appareils couverts par d’autres
normes de produit de la CEI 60947.
2) Les conditions du matériel en ce qui concerne:
a) le fonctionnement auquel il est destiné;
b) le fonctionnement et le comportement en cas de conditions anormales spécifiées,
telles que le court-circuit;
c) les propriétés diélectriques.
3) Les essais destinés à confirmer que ces conditions sont satisfaites et les méthodes pour
réaliser ces essais.
4) Les informations à marquer sur le matériel et fournies par le constructeur.
60947-6-1 IEC:2005 – 13 –
LOW-VOLTAGE SWITCHGEAR AND CONTROLGEAR –
Part 6-1: Multiple function equipment –
Transfer switching equipment
1 Scope and object
This part of IEC 60947applies to transfer switching equipment (TSE) to be used in power
systems with interruption of the supply to the load during transfer, the rated voltage of which
does not exceed 1 000 V a.c. or 1 500 V d.c.
It covers:
– manually operated transfer switching equipment (MTSE);
– remote operated transfer switching equipment (RTSE);
– automatic transfer switching equipment (ATSE).
It covers TSE provided with or without an enclosure.
Devices necessary for the control (e.g. control switches, etc.) and the protection (e.g. circuit-
breakers, etc.) of a TSE are covered by the relevant IEC standards.
NOTE TSE used only for emergency lighting may be subject to specific rules and/or legal requirements and are
not, therefore, covered by this standard.
The object of this part of IEC 60947 is to state:
1) The characteristics of the equipment:
a) specific equipment;
b) equipment the main part of which being devices covered by other IEC 60947 product
standards.
2) The conditions of the equipment with respect to:
a) operation for which the equipment is intended;
b) operation and behaviour in case of specified abnormal conditions, for example, short-
circuit;
c) dielectric properties.
3) The tests intended to confirm that these conditions have been met and the methods for
performing these tests.
4) The data to be marked on the equipment and provided by the manufacturer.
– 14 – 60947-6-1 CEI:2005
2 Références normatives
Les documents de référence suivants sont indispensables pour l'application du présent
document. Pour les références datées, seule l'édition citée s'applique. Pour les références
non datées, la dernière édition du document de référence s'applique (y compris les éventuels
amendements).
CEI 60695-11-10:1999, Essais relatifs aux risques du feu – Partie 11-10: Flammes d'essai –
Méthodes d'essai horizontale et verticale à la flamme de 50 W
Amendement 1 (2003)
CEI 60947-1:2004, Appareillage à basse tension – Partie 1: Règles générales
CEI 60947-2:2003, Appareillage à basse tension – Partie 2: Disjoncteurs
CEI 60947-3:1999, Appareillage à basse tension – Partie 3: Interrupteurs, sectionneurs,
interrupteurs-sectionneurs et combinés-fusibles
Amendement 1 (2001)
CEI 60947-4-1:2000, Appareillage à basse tension – Partie 4-1: Contacteurs et démarreurs de
moteurs – Contacteurs et démarreurs électromécaniques
Amendement 1 (2002)
CEI 60947-4-2:1999, Appareillage à basse tension – Partie 4-2: Contacteurs et démarreurs de
moteurs – Gradateurs et démarreurs à semiconducteurs de moteurs à courant alternatif
Amendement 1 (2001)
CEI 60947-4-3:1999, Appareillage à basse tension – Partie 4-3: Contacteurs et démarreurs de
moteurs – Gradateurs et contacteurs à semiconducteurs pour charges, autres que des
moteurs, à courant alternatif
CEI 60947-6-2:2002, Appareillage à basse tension – Partie 6-2: Matériels à fonctions
multiples – Appareils (ou matériel) de connexion de commande de protection (ACP)
CEI 61000-4-2:1995, Compatibilité électromagnétique (CEM) – Partie 4-2: Techniques d’essai
et de mesure – Essais d’immunité aux décharges électrostatiques
Amendement 1 (1998)
Amendement 2 (2000)
CEI 61000-4-3:2002, Compatibilité électromagnétique (CEM) – Partie 4-3: Techniques d’essai
et de mesure – Essai d’immunité aux champs électromagnétiques rayonnés aux fréquences
radioélectriques
Amendement 1 (2002)
CEI 61000-4-4:1995, Compatibilité électromagnétique (CEM) – Partie 4-4: Techniques d’essai
et de mesure – Essais d’immunité aux transitoires électriques rapides en salves
Amendement 1 (2000)
Amendement 2 (2001)
CEI 61000-4-5:1995, Compatibilité électromagnétique (CEM) – Partie 4-5: Techniques d’essai
et de mesure – Essai d’immunité aux ondes de choc
Amendement 1 (2000)
CEI 61000-4-6:2003, Compatibilité électromagnétique (CEM) – Partie 4-6: Techniques d'essai
et de mesure – Immunité aux perturbations conduites, induites par les champs radio-
électriques
Amendement 1 (2004)
60947-6-1 IEC:2005 – 15 –
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 60695-11-10:1999, Fire hazard testing – Part 11-10: Test flames – 50 W horizontal and
vertical flame test methods
Amendment 1 (2003)
IEC 60947-1:2004, Low-voltage switchgear and controlgear – Part 1: General rules
IEC 60947-2:2003, Low-voltage switchgear and controlgear – Part 2: Circuit-breakers
IEC 60947-3:1999, Low-voltage switchgear and controlgear – Part 3: Switches, disconnectors,
switch-disconnectors and fuse-combination units
Amendment 1 (2001)
IEC 60947-4-1:2000, Low-voltage switchgear and controlgear – Part 4-1: Contactors and
motor-starters – Electromechanical contactors and motor-starters
Amendment 1 (2002)
IEC 60947-4-2:1999, Low-voltage switchgear and controlgear – Part 4-2: Contactors and
motor-starters – AC semiconductor motor controllers and starters
Amendment 1 (2001)
IEC 60947-4-3:1999, Low-voltage switchgear and controlgear – Part 4-3: Contactors and
motor-starters – AC semiconductor controllers and contactors for non-motor loads
IEC 60947-6-2:2002, Low-voltage switchgear and controlgear – Part 6-2: Multiple function
equipment – Control and protective switching devices (or equipment) (CPS)
IEC 61000-4-2:1995, Electromagnetic compatibility (EMC) – Part 4-2: Testing and
measurement techniques – Electrostatic discharge immunity test
Amendment 1 (1998)
Amendment 2 (2000)
IEC 61000-4-3:2002, Electromagnetic compatibility (EMC) – Part 4-3: Testing and
measurement techniques – Radiated, radio-frequency, electromagnetic field immunity test
Amendment 1 (2002)
IEC 61000-4-4:1995, Electromagnetic compatibility (EMC) – Part 4-4: Testing and
measurement techniques – Electrical fast transient/burst immunity test
Amendment 1 (2000)
Amendment 2 (2001)
IEC 61000-4-5:1995, Electromagnetic compatibility (EMC) – Part 4-5: Testing and
measurement techniques – Surge immunity test
Amendment 1 (2000)
IEC 61000-4-6:2003, Electromagnetic compatibility (EMC) – Part 4-6: Testing and
measurement techniques – Immunity to conducted disturbances, induced by radio-frequency
fields
Amendment 1 (2004)
– 16 – 60947-6-1 CEI:2005
CISPR 11:2003, Appareils industriels, scientifiques et médicaux (ISM) à fréquence radio-
électrique – Caractéristiques de perturbations électromagnétiques – Limites et méthodes de
mesure
Amendement 1 (2004)
3 Termes et définitions, symboles et abréviations
Pour la présente partie de la CEI 60947, les termes et définitions appropriées, données à
l'Article 2 de la CEI 60947-1, et les définitions complémentaires, ci-après, sont applicables:
Référence
D
Durée de manœuvre de transfert . 3.2.6
Durée de retour du transfert. 3.2.8
Durée de transfert des contacts . 3.2.5
Durée d’interruption . 3.2.9
Durée totale de manœuvre . 3.2.7
E
Ecart
...
IEC 60947-6-1 ®
Edition 2.1 2013-12
CONSOLIDATED
VERSION
VERSION
CONSOLIDÉE
colour
inside
Low-voltage switchgear and controlgear –
Part 6-1: Multiple function equipment – Transfer switching equipment
Appareillage à basse tension –
Partie 6-1: Matériels à fonctions multiples – Matériels de connexion de transfert
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IEC 60947-6-1 ®
Edition 2.1 2013-12
CONSOLIDATED
VERSION
VERSION
CONSOLIDÉE
colour
inside
Low-voltage switchgear and controlgear –
Part 6-1: Multiple function equipment – Transfer switching equipment
Appareillage à basse tension –
Partie 6-1: Matériels à fonctions multiples – Matériels de connexion de transfert
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.120.40, 29.130.20 ISBN 978-2-8322-1314-8
IEC 60947-6-1 ®
Edition 2.1 2013-12
REDLINE VERSION
VERSION REDLINE
colour
inside
Low-voltage switchgear and controlgear –
Part 6-1: Multiple function equipment – Transfer switching equipment
Appareillage à basse tension –
Partie 6-1: Matériels à fonctions multiples – Matériels de connexion de transfert
– 2 – 60947-6-1 IEC:2005+A1:2013
CONTENTS
FOREWORD . 4
INTRODUCTION TO THE AMENDMENT . 7
1 Scope and object . 8
2 Normative references . 8
3 Terms and definitions, symbols and abbreviations . 10
3.1 Switching devices . 11
3.2 Operation of TSE. 11
3.3 Main contact positions . 12
3.4 Symbols and abbreviations . 13
4 Classification . 13
5 Characteristics . 13
5.1 Summary of characteristics . 13
5.2 Type of equipment . 14
5.3 Rated and limiting values for the main circuit . 14
5.4 Utilization category . 16
5.5 Control circuits . 16
5.6 Auxiliary circuits . 17
6 Product information . 17
6.1 Nature of information . 17
6.2 Marking . 18
6.3 Instructions for installation, operation and maintenance . 18
7 Normal service, mounting and transport conditions . 18
8 Constructional and performance requirements . 18
8.1 Constructional requirements . 18
8.2 Performance requirements . 19
8.3 Electromagnetic compatibility (EMC) . 24
9 Tests . 25
9.1 Kinds of tests . 25
9.2 Compliance with constructional requirements . 26
9.3 Performance . 26
9.4 Routine tests . 37
9.5 EMC tests . 38
Annex A (normative) – Assignment of utilization categories based on the results of tests . 43
Annex B (informative) – Items subject to agreement between manufacturer and user . 45
Bibliography . 46
Figure 1 – Test circuit for connection to normal and alternative supplies . 41
Figure 2 – Test circuit for the verification of making and breaking capacities on three poles . 42
Figure 3 – Test circuit for the verification of making and breaking capacities on two poles . 42
60947-6-1 IEC:2005+A1:2013 – 3 –
Table 1 – Utilization categories . 16
Table 2 – Verification of making and breaking capacity – Conditions for making and
breaking corresponding to the utilization categories . 21
Table 3 – Verification of operational performance – Conditions for making and breaking
corresponding to the utilization categories . 22
Table 4 – Value of the test current for the verification of the ability to operate under
short-circuit conditions . 23
Table 5 – Acceptance criteria . 25
Table 6 – List of type tests (overall scheme of test sequences) . 27
Table 7 – List of type tests (referred to by their subclause numbers) to which a given
derived TSE shall be submitted . 28
Table 8 – Number and duration of operating cycles for the making and breaking
capacity test . 32
Table 9 – Number and duration of operating cycles for the electrical and mechanical
operational performance tests for operation A utilization categories . 33
Table 10 – Number and duration of operating cycles for the electrical and mechanical
operational performance tests for operation B utilization categories . 34
Table 11 – Value of the test current for the verification of the ability to operate under
short-circuit conditions (harmonized table) . 24
Table A.1 – Equivalence between utilization categories used in some IEC 60947
product standards . . 44
– 4 – 60947-6-1 IEC:2005+A1:2013
INTERNATIONAL ELECTROTECHNICAL COMMISSION
___________
LOW-VOLTAGE SWITCHGEAR AND CONTROLGEAR –
Part 6-1: Multiple function equipment –
Transfer switching equipment
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,
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agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
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3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
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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 provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with an IEC Publication.
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.
This Consolidated version of IEC 60947-6-1 bears the edition number 2.1. It consists of
the second edition (2005) [documents 17B/1418/FDIS and 17B/1424/RVD] and its
amendment 1 (2013) [documents 17B/1830/FDIS and 17B/1840/RVD]. The technical
content is identical to the base edition and its amendment.
In this Redline version, a vertical line in the margin shows where the technical content
is modified by amendment 1. Additions and deletions are displayed in red, with
deletions being struck through. A separate Final version with all changes accepted is
available in this publication.
This publication has been prepared for user convenience.
60947-6-1 IEC:2005+A1:2013 – 5 –
International Standard IEC 60947-6-1 has been prepared by subcommittee 17B: Low-voltage
switchgear and controlgear, of IEC technical committee 17: Switchgear and controlgear.
This part of IEC 60947shall be used in conjunction with IEC 60947-1: General rules.
The provisions of the general rules dealt with in IEC 60947-1 are applicable to this part of
IEC 60947, where specifically called for. Clauses and subclauses, tables, figures and
annexes of the general rules thus applicable are identified by reference to IEC 60947-1 (e.g.
1.2.3 of IEC 60947-1, Table 4 of IEC 60947-1 or Annex A of IEC 60947-1, etc.).
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
IEC 60947 consists of the following parts, under the general title Low-voltage switchgear and
controlgear:
Part 1: General rules
Part 2: Circuit-breakers
Part 3: Switches, disconnectors, switch-disconnectors and fuse-combination units
Part 4-1: Contactors and motor-starters – Electromechanical contactors and motor-starters
Part 4-2: Contactors and motor-starters – AC semiconductor motor controllers and starters
Part 4-3: Contactors and motor-starters – AC semiconductor controllers and contactors for
non-motor loads
Part 5-1: Control circuit devices and switching elements – Electromechanical control circuit
devices
Part 5-2: Control circuit devices and switching elements – Proximity switches
Part 5-3: Control circuit devices and switching elements – Requirements for proximity
devices with defined behaviour under fault conditions (PDF)
Part 5-4: Control circuit devices and switching elements – Method of assessing the
performance of low-energy contacts – Special tests
Part 5-5: Control circuit devices and switching elements – Electrical emergency stop device
with mechanical latching function
Part 5-6: Control circuit devices and switching elements – DC interface for proximity
sensors and switching amplifiers (NAMUR)
Part 5-7: Control circuit devices and switching elements – Requirements for proximity
devices with analogue output
Part 5-8: Control circuit devices and switching elements – Three-position enabling switches
Part 5-9: Control circuit devices and switching elements – Flow rate switches
Part 6-1: Multiple function equipment – Automatic transfer switching equipment
Part 6-2: Multiple function equipment – Control and protective switching devices (or
equipment) (CPS)
Part 7-1: Ancillary equipment – Terminal blocks for copper conductors
Part 7-2: Ancillary equipment – Protective conductor terminal blocks for copper conductors
Part 7-3: Ancillary equipment – Safety requirements for fuse terminal blocks
Part 7-3: Ancillary equipment – Safety requirements for fuse terminal blocks
Part 8: Control units for built-in thermal protection (PTC) for rotating electrical machines
—————————
Under consideration.
– 6 – 60947-6-1 IEC:2005+A1:2013
The committee has decided that the contents of the base publication and its amendment 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.
IMPORTANT – The “colour inside” logo on the cover page of this publication indicates
that it contains colours which are considered to be useful for the correct understanding
of its contents. Users should therefore print this publication using a colour printer.
60947-6-1 IEC:2005+A1:2013 – 7 –
INTRODUCTION TO THE AMENDMENT
This amendment includes the following significant technical changes with respect to the
second edition of IEC 60947-6-1 published in 2005:
• clarification of the scope and object;
• update of the normative references;
• clarification of the classification in Clause 4;
• new EMC test: voltage harmonics
• minimum test for derived TSE;
• alignments to the Amendment 1 (2010) of IEC 60947-1:2007:
– electrically or electronically controlled circuits;
– markings ("s", "sol", "r" or "f");
– constructional requirements including material requirements;
– requirement for screwless terminals;
– references to EMC test.
• alignments to the Amendment 1 (2012) of IEC 60947-4-1:2009:
– test at the rated conditional short-circuit current I of protected switching devices;
q
– short-circuit tests harmonisation.
• creation of bibliography.
– 8 – 60947-6-1 IEC:2005+A1:2013
LOW-VOLTAGE SWITCHGEAR AND CONTROLGEAR –
Part 6-1: Multiple function equipment –
Transfer switching equipment
1 Scope and object
This part of IEC 60947 applies to transfer switching equipment (TSE) to be used in power
systems for transferring a load supply between a normal and an alternate source with a
supply interruption of the supply to the load during transfer, the rated voltage of which does
not exceed 1 000 V a.c. or 1 500 V d.c.
It covers:
– manually operated transfer switching equipment (MTSE);
– remotely operated transfer switching equipment (RTSE);
– automatic transfer switching equipment (ATSE).
It covers TSE provided with or without an enclosure.
Devices necessary for the control (e.g. control switches, etc.) and the protection (e.g. circuit-
breakers, etc.) of a TSE are covered by the relevant IEC standards.
NOTE 1 TSE used only for emergency lighting may be subject to specific rules and/or legal requirements and are
not, therefore, covered by this standard.
The object of this part of IEC 60947 is to state:
1) The characteristics of the equipment:
a) specific equipment;
b) equipment the main part of which being devices covered by other IEC 60947 product
standards.
2) The conditions of the equipment with respect to:
a) operation for which the equipment is intended;
b) operation and behaviour in case of specified abnormal conditions, for example, short-
circuit;
c) dielectric properties.
3) The tests intended to confirm that these conditions have been met and the methods for
performing these tests.
4) The data to be marked on the equipment and provided by the manufacturer.
NOTE 2 This standard covers also ATSE or RTSE which can be used for safety services as defined in
IEC 60364-1 and for which the installation requirements are given by IEC 60364-5-56.
NOTE 3 Other ATSE requirements are under consideration such as closed transition TSE (make before break
transfer operation).
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.
60947-6-1 IEC:2005+A1:2013 – 9 –
IEC 60417-DB , Graphical symbols for use on equipment
IEC 60695-11-10:1999, Fire hazard testing – Part 11-10: Test flames – 50 W horizontal and
vertical flame test methods
Amendment 1 (2003)
IEC 60947-1:2004 2007, Low-voltage switchgear and controlgear – Part 1: General rules
Amendment 1 (2010)
IEC 60947-2:2003 2006, Low-voltage switchgear and controlgear – Part 2: Circuit-breakers
Amendment 1 (2009)
Amendment 2 (2013)
IEC 60947-3:1999 2008, Low-voltage switchgear and controlgear – Part 3: Switches,
disconnectors, switch-disconnectors and fuse-combination units
Amendment 1 (2001 2012)
IEC 60947-4-1:2000 2009, Low-voltage switchgear and controlgear – Part 4-1: Contactors and
motor-starters – Electromechanical contactors and motor-starters
Amendment 1 (2002 2012)
IEC 60947-4-2:1999, Low-voltage switchgear and controlgear – Part 4-2: Contactors and
motor-starters – AC semiconductor motor controllers and starters
Amendment 1 (2001)
IEC 60947-4-3:1999, Low-voltage switchgear and controlgear – Part 4-3: Contactors and
motor-starters – AC semiconductor controllers and contactors for non-motor loads
IEC 60947-6-2:2002, Low-voltage switchgear and controlgear – Part 6-2: Multiple function
equipment – Control and protective switching devices (or equipment) (CPS)
Amendment 1 (2007)
IEC 61000-4-2:1995, Electromagnetic compatibility (EMC) – Part 4-2: Testing and
measurement techniques – Electrostatic discharge immunity test
Amendment 1 (1998)
Amendment 2 (2000)
IEC 61000-4-3:2002, Electromagnetic compatibility (EMC) – Part 4-3: Testing and
measurement techniques – Radiated, radio-frequency, electromagnetic field immunity test
Amendment 1 (2002)
IEC 61000-4-4:1995, Electromagnetic compatibility (EMC) – Part 4-4: Testing and
measurement techniques – Electrical fast transient/burst immunity test
Amendment 1 (2000)
Amendment 2 (2001)
IEC 61000-4-5:1995, Electromagnetic compatibility (EMC) – Part 4-5: Testing and
measurement techniques – Surge immunity test
Amendment 1 (2000)
IEC 61000-4-6:2003, Electromagnetic compatibility (EMC) – Part 4-6: Testing and
measurement techniques – Immunity to conducted disturbances, induced by radio-frequency
fields
Amendment 1 (2004)
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Available at: http://www.graphical-symbols.info/equipment
– 10 – 60947-6-1 IEC:2005+A1:2013
IEC 61000-4-13:2002, Electromagnetic compatibility (EMC) – Part 4-13: Testing and
measurement techniques – Harmonics and interharmonics including mains signalling at a.c.
power port, low-frequency immunity tests
Amendment 1:2009
CISPR 11:2003, Industrial, scientific and medical (ISM) radio-frequency equipment –
Electromagnetic disturbance characteristics – Limits and methods of measurement
Amendment 1 (2004)
CISPR 11:2009, Industrial, scientific and medical equipment – Radio-frequency disturbance
characteristics – Limits and methods of measurement
Amendment 1:2010
3 Terms and definitions, symbols and abbreviations
For the purpose of this part of IEC 60947 the relevant terms and definitions given in Clause 2
of IEC 60947-1 and the following additional definitions shall apply:
Reference
A
Alternative position . 3.3.2
Automatic transfer switching equipment (ATSE) . 3.1.4
C
Contact transfer time . 3.2.5
D
Derived transfer switching equipment (derived TSE) . 3.1.5
F
Frequency supply deviation . 3.2.4
M
Manually operated transfer switching equipment (MTSE) . 3.1.2
Monitored supply deviation of ATSE . 3.2.2
N
Normal position . 3.3.1
O
Off position . 3.3.3
Off-time . 3.2.9
Operating sequence of ATSE . 3.2.1
Operating transfer time . 3.2.6
R
Remotely operated transfer switching equipment (RTSE) . 3.1.3
Return transfer time . 3.2.8
S
Switching position . 3.3.4
T
Total operating time . 3.2.7
Transfer switching equipment (TSE) . 3.1.1
V
Voltage supply deviation . 3.2.3
60947-6-1 IEC:2005+A1:2013 – 11 –
3.1 Switching devices
3.1.1
transfer switching equipment
TSE
equipment containing one or more switching devices for disconnecting load circuits from one
supply and connecting to another supply
3.1.2
manually operated transfer switching equipment
MTSE
transfer switching equipment operated manually
3.1.3
remotely operated transfer switching equipment
RTSE
transfer switching equipment operated remotely
NOTE RTSE may have an optional feature for local operation.
3.1.4
automatic transfer switching equipment
ATSE
self-acting transfer switching equipment
NOTE 1 ATSE normally includes all necessary devices for monitoring and transferring operations.
NOTE 2 ATSE may have an optional feature for manual operation.
3.1.5
derived transfer switching equipment
derived TSE
TSE in which the main part are device(s) fulfilling requirements of other IEC 60947 product
standards
NOTE 1 For convenience, derived TSE may be called derived ATSE, derived MTSE or derived RTSE.
NOTE 2 For convenience, parts other than main parts (e.g. those intended to control the TSE: control switches,
mechanical interlocking devices, …) are called other parts.
3.2 Operation of TSE
3.2.1
operating sequence of ATSE
automatic transfer of a load from the normal supply to an alternative supply in the event of a
monitored supply deviation with an automatic return of the load to the normal supply when
restored
NOTE 1 The transfer may be with or without a predetermined time delay and may include an off position.
NOTE 2 In the case of both the normal and the alternative supplies being present, the ATSE assumes the normal
supply position.
3.2.2
monitored supply deviation of ATSE
variation in the power supply characteristics which signals the ATSE to operate when a
deviation from the specified limits occurs
EXAMPLE Abnormal changes in voltage or frequency of the supply are supply deviations.
3.2.3
voltage supply deviation
change or loss of voltage of the normal power supply
– 12 – 60947-6-1 IEC:2005+A1:2013
3.2.4
frequency supply deviation
change in frequency from the normal operating frequency of the normal supply
3.2.5
contact transfer time
time measured from the parting of one set of main contacts from one power supply to the
closing of a second set of main contacts on an alternative power supply
3.2.6
operating transfer time
time measured from the instant of the monitored supply deviation to the closing of main
contacts on an available alternative supply source, exclusive of any purposely introduced time
delay
3.2.7
total operating time
sum of operating transfer time and any purposely introduced time delay
3.2.8
return transfer time
time from the instant when the normal supply is fully restored to the instant when the set of
main contacts is closed on the normal supply, plus any purposely introduced time delay
3.2.9
off-time
time measured during transfer from the instant of final arc extinction, under the conditions
producing the longest arcing time, in all poles to the closing of main contacts on another
supply
NOTE Any purposely introduced time delay would be included within the off-time.
3.3 Main contact positions
3.3.1
normal position
contact position of the equipment when there is no deviation of the normal supply
3.3.2
alternative position
contact position of the equipment when the load circuit is switched on the alternative
(emergency) supply in the event of a monitored supply deviation of the normal supply
3.3.3
off position
contact position of the equipment when the load circuit is not switched on any supply
NOTE This position results from either automatic tripping caused by a fault in the load circuit or intentional
interruption of the automatic transfer function.
3.3.4
switching position (of a TSE)
mechanical configuration of the main contacts of a TSE regarding the load connexion to a
source, which could be either connected to the normal source in the normal position, the
alternate source in the alternative position, or disconnected in the off position (if applicable)
60947-6-1 IEC:2005+A1:2013 – 13 –
3.4 Symbols and abbreviations
ATSE Automatic transfer switching equipment
EMC Electromagnetic compatibility
I Rated short-circuit making capacity (5.3.6.2)
cm
I Rated short-circuit breaking capacity (5.3.6.3)
cn
I Rated short-time withstand current (5.3.6.1)
cw
I Rated operational current (5.3.2)
e
Rated conditional short-circuit current
I
q
I Rated uninterrupted current (5.3.2)
u
MTSE Manually operated transfer switching equipment
"r" Minimum short-circuit test current
RTSE Remotely operated transfer switching equipment
SCPD Short-circuit protective device
TSE Transfer switching equipment
U Rated operational voltage (5.3.1.1)
e
Rated insulation voltage (5.3.1.2)
U
i
U Rated impulse withstand voltage (5.3.1.3)
imp
Power frequency or d.c. recovery voltage (Table 2)
U
r
4 Classification
Transfer switching equipment is classified according to:
a) their short-circuit capability:
− class PC: TSE that is capable of making and withstanding, but is not intended for
breaking short-circuit currents;
NOTE 1 Contactors can be used in class PC if they fulfil the test requirements of class PC.
− class CB: TSE provided with over-current releases and the main contacts of which are
that is capable of making, withstanding and are is intended for breaking short-circuit
currents and is provided with over-current releases;
− class CC: TSE that is capable of making and withstanding, but is not intended for
breaking short-circuit currents. TSE and is based on devices fulfilling the requirements
of IEC 60947-4-1;
NOTE 2 The mirror contact defined in IEC 60947-4-1 should be used to monitor the state of the contacts of a
class CC TSE.
NOTE 3 The appropriate ATSE classification for use for safety services in electrical supply systems is under
consideration.
b) the method of controlling the transfer:
− manually operated switching equipment (MTSE);
− remotely operated switching equipment (RTSE);
− automatic transfer switching equipment (ATSE).
5 Characteristics
5.1 Summary of characteristics
Wherever practicable the characteristics of the TSE shall be stated as follows:
– Type of equipment (5.2).
– 14 – 60947-6-1 IEC:2005+A1:2013
– Rated and limiting values for the main circuit (5.3).
– Utilization category (5.4).
– Control circuits (5.5).
– Auxiliary circuits (5.6).
Where the TSE uses IEC 60947 products, the relevant characteristics from those standards
may also be additionally used.
5.2 Type of equipment
The following shall be stated:
– class and transfer control method of the equipment (see Clause 4);
– number of poles;
– kind of current;
– operating sequence.
5.3 Rated and limiting values for the main circuit
Subclause 4.3 of IEC 60947-1 applies. However, minimum values for 5.3.6.1, 5.3.6.3 and
5.3.6.4 are given in Table 4 or in Table 11.
5.3.1 Rated voltages
5.3.1.1 Rated operational voltage (U )
e
Subclause 4.3.1.1 of IEC 60947-1 applies.
5.3.1.2 Rated insulation voltage (U )
i
Subclause 4.3.1.2 of IEC 60947-1 applies.
5.3.1.3 Rated impulse withstand voltage (U )
imp
Subclause 4.3.1.3 of IEC 60947-1 applies.
5.3.2 Rated operational current (I )
e
The rated operational current of TSE is the rated uninterrupted current (I ). See 4.3.2.4 of
u
IEC 60947-1.
5.3.3 Rated frequency
Subclause 4.3.3 of IEC 60947-1 applies.
5.3.4 Uninterrupted duty
Subclause 4.3.4.2 of IEC 60947-1 applies.
5.3.5 Rated making and breaking capacities
The rated making and breaking capacities are the values of current, stated by the
manufacturer, which the transfer equipment can satisfactorily make and break under specified
conditions. Unless stated otherwise, they are given in terms of a steady state current value.
During the making operation, the peak value of the current on contact closing may be higher
than the peak value of the steady state current depending on the characteristics of the test
circuit (load) and the instant of closing on the voltage wave.
60947-6-1 IEC:2005+A1:2013 – 15 –
The rated making and breaking capacities are stated with reference to the rated operational
voltage, the rated operational current and the utilization category according to Table 2.
For a.c., the rated making and breaking capacities are expressed by the r.m.s. value of the
a.c. component of the current.
5.3.6 Short-circuit characteristics
5.3.6.1 Rated short-time withstand current (I )
cw
The rated short-time withstand current is the value of short-time withstand current stated by
the manufacturer which the equipment can carry under the test conditions specified in 9.3.4.3.
For a.c., the value of the current is the r.m.s. value of the a.c. component and the highest
peak value in any one phase shall be not less than n times this r.m.s. value, the ratio n being
given in Table 16 of IEC 60947-1.
The minimum value of the short-time withstand current is given in column 2 of Table 4 or in
Table 11.
NOTE Additional lower values of short-time withstand current for longer durations may be stated by the
manufacturer.
The minimum durations are:
– 3 half-cycles of the rated frequency or 0,025 s for d.c. for rated operational currents up to
and including 400 A;
– 3 cycles of the rated frequency or 0,05 s for d.c. for rated operational currents higher than
400 A.
5.3.6.2 Rated short-circuit making capacity (I )
cm
The rated short-circuit making capacity is the value of short-circuit making capacity assigned
by the manufacturer for the rated operational voltage at rated frequency and at a specified
power-factor (or time-constant). It is expressed as the maximum prospective peak current.
For class CB TSE and for a.c., the rated short-circuit making capacity shall be not less than
highest value of short-circuit breaking capacity, multiplied by the ratio n of Table 16 of
IEC 60947-1. The manufacturer may assign a higher value of short-circuit making capacity.
For d.c., the rated short-circuit making capacity shall be not less than its rated short-circuit
breaking capacity, on the assumption that the steady-state short-circuit current is constant.
A rated short-circuit making capacity implies that the TSE shall be able to make the current
corresponding to that rated capacity at an applied voltage up to and including that
corresponding to 105 % of the rated operational voltage.
5.3.6.3 Rated short-circuit breaking capacity (I )
cn
The rated short-circuit breaking capacity is the value of short-circuit breaking capacity
assigned by the manufacturer for the rated operational voltage, at rated frequency and at a
specified power-factor (or time-constant).
It is expressed as the value of the prospective breaking current (r.m.s. value of the a.c.
component in the case of a.c.).
The minimum value of the rated short-circuit breaking capacity is given in column 2 of Table 4
or in Table 11. The manufacturer may assign a higher value of breaking capacity.
– 16 – 60947-6-1 IEC:2005+A1:2013
A rated short-circuit breaking capacity implies that a Class CB TSE shall be able to break any
current up to the rated capacity.
5.3.6.4 Rated conditional short-circuit current
The rated conditional short-circuit current is the value of prospective current, stated by the
manufacturer, which the TSE, protected by a specified short-circuit protective device (SCPD),
can satisfactorily withstand for the operating time of this device under the test conditions
specified in 9.3.4.4.
The minimum value of the prospective current is given in column 2 of Table 4 or in Table 11.
Details of the specified short-circuit protective device shall be indicated by the manufacturer.
They shall include the type, rating, characteristics and, for current limiting devices, the
maximum peak current and the I t corresponding to the value of the prospective current.
NOTE 1 For a.c., the rated conditional short-circuit current is expressed by the r.m.s. value of the a.c. component.
NOTE 2 The short-circuit protective device may either form an integral part of the equipment or be a separate unit.
5.4 Utilization category
TSE may be assigned to one or more of the standard utilization categories given in Table 1 at
one or more rated utilization operational voltages.
The designation of utilization categories is completed by the suffix A or B, according to the
number of operations (see Tables 8, 9 and 10) required by the application.
TSE assigned any utilization category shall comply with the rated making and breaking
capacity (Table 2) and the electrical and mechanical operational performance requirements
(Table 3) corresponding to the assigned utilization category.
Table 1 – Utilization categories
Nature Utilization category Typical applications
of current
Operation A Operation B
AC-31A AC-31B Non-inductive or slightly inductive loads
AC-32A AC-32B Switching of mixed resistive and inductive loads,
including moderate overloads
Alternating
AC-33A AC-33B Motor loads or mixed loads including motors, resistive
current
loads and up to 30 % incandescent lamp loads
AC-35A AC-35B Electric discharge lamp loads
AC-36A AC-36B Incandescent lamp loads
DC-31A DC-31B Resistive loads
Direct current DC-33A DC-33B Motor loads or mixed loads including motors
DC-36A DC-36B Incandescent lamp load
For TSE for which the main parts are covered by other IEC 60947 product standards,
utilization categories defined in these product standards may be used as equivalent as those
defined in Table 1, see Annex A.
5.5 Control circuits
Subclause 4.5 of IEC 60947-1 applies with the following additions for monitored supply (see
3.2.2).
60947-6-1 IEC:2005+A1:2013 – 17 –
5.5.1 Electro-mechanical devices controlling the main circuit
The minimum and maximum values of voltage or voltage and frequency operating limits shall
be stated by the manufacturer. These limits shall correspond to the limits for the transfer
control devices.
5.5.2 Transfer control devices
The manufacturer shall state the following:
a) the voltage and frequency deviations
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