IEC 61558-1:2017
(Main)Safety of transformers, reactors, power supply units and combinations thereof - Part 1: General requirements and tests
Safety of transformers, reactors, power supply units and combinations thereof - Part 1: General requirements and tests
IEC 61558-1:2017 deals with safety aspects of transformers, reactors, power supply units and combinations thereof such as electrical, thermal and mechanical safety. This document covers the following independent or associated stationary or portable types of dry-type transformers, power supply units, including switch mode power supply units, reactors and combinations thereof in the field of safety. The windings can be encapsulated or non-encapsulated. They are not forming a part of the distribution network. This third edition cancels and replaces the second edition published in 2005 and Amendment 1:2009. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
a. fully insulated winding wires (FIW), new tables and aging tests for FIW constructions,
b. overvoltage categories 1, 2, 3 and 4 for clearances and dielectric strength tests (new tables) are included,
c. development of new symbols for the different overvoltage categories,
d. symbol for maximum altitudes, if higher than 2 000 m,
e. symbol for plug in power supply units, if the pins are damaged (tumbling barrel test),
f. symbol for minimum temperature (even during the transportation),
g. alternative temperature measurement, simulated load and back to back method according to IEC 60076-11,
h. short circuit and overload protection, simulated load and back to back method according to IEC 60076-11,
i. adjustment of temperatures in Table 2 according to CENELEC Guide 29,
j. establishing partial discharge test above 750 V for FIW constructions,
k. requirements for toroidal core constructions, division for basic and for supplementary isolation,
l. modification of protection indexes for enclosures (IP-code),
m. dimensioning of rectangular cross section connectors for transformers,
n. repetition test, 80% of required dielectric strength test voltage of Table 14,a.
o. vibration test for vehicles and railway applications,
p. two Y1 Capacitors for working voltages above 250 V and not exceeding 500 V with overvoltage category 3.
It has the status of a group safety publication in accordance with IEC Guide 104.
Sécurité des transformateurs, bobines d'inductance, blocs d'alimentation et des combinaisons de ces éléments - Partie 1: Exigences générales et essais
L'IEC 61558-1:2017 traite des aspects relatifs à la sécurité des transformateurs, bobines d’inductance, blocs d’alimentation et des combinaisons de ces éléments, tels que la sécurité électrique, la sécurité thermique et la sécurité mécanique. Le présent document couvre les transformateurs de type sec, les blocs d’alimentation, y compris les blocs d’alimentation à découpage, les bobines d’inductance et les combinaisons de ces éléments, de type indépendant ou associé, fixe ou mobile, dans le domaine de la sécurité. Les enroulements peuvent être enrobés ou non enrobés. Ils ne constituent pas une partie du réseau de distribution. Cette troisième édition annule et remplace la deuxième édition parue en 2005 et l’Amendement 1:2009. Cette édition constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l’édition précédente:
a. fils de bobinage totalement isolés (FIW), nouveaux tableaux et essais de vieillissement pour les constructions avec fils FIW,
b. les catégories de surtensions 1, 2, 3 et 4 pour les distances d’isolement et les essais de rigidité diélectrique (nouveaux tableaux) sont incluses,
c. développement de nouveaux symboles pour les différentes catégories de surtensions,
d. symbole pour les altitudes maximales, si elles sont supérieures à 2 000 m,
e. symbole pour les blocs d’alimentation enfichables, si les broches sont endommagées (essai au tambour tournant),
f. symbole pour la température minimale (même durant le transport),
g. variante de mesure de la température, méthode de charge simulée et d’essai en opposition conformément à l’IEC 60076-11,
h. protection contre les courts-circuits et les surcharges, méthode de charge simulée et d’essai en opposition conformément à l’IEC 60076-11,
i. ajustement des températures dans le Tableau 2 conformément au Guide CENELEC 29,
j. établissement de l’essai de décharge partielle au-dessus de 750 V pour les constructions avec fils FIW,
k. exigences pour noyaux toroïdaux, division pour l’isolation principale et pour l’isolation supplémentaire,
l. modification des indices de protection pour les enveloppes (code IP),
m. dimensionnement des connecteurs de section rectangulaire pour transformateurs,
n. essai de répétition, 80 % de la tension d’essai de rigidité diélectrique requise dans le Tableau 14,
o. essai de vibrations pour les véhicules et les applications ferroviaires,
p. deux condensateurs Y1 pour des tensions locales supérieures à 250 V et ne dépassant pas 500 V avec la catégorie de surtension 3.
Elle a le statut d'une publication groupée de sécurité conformément au Guide IEC 104.
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IEC 61558-1 ®
Edition 3.0 2017-09
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
GROUP SAFETY PUBLICATION
Safety of power transformers, power supplies, reactors, power supply units and
similar products combinations thereof –
Part 1: General requirements and tests
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
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About the IEC
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International Standards for all electrical, electronic and related technologies.
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IEC 61558-1 ®
Edition 3.0 2017-09
REDLINE VERSION
INTERNATIONAL
STANDARD
colourcolour
insinsiidede
GROUP SAFETY PUBLICATION
Safety of power transformers, power supplies, reactors, power supply units and
similar products combinations thereof –
Part 1: General requirements and tests
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 29.180 ISBN 978-2-8322-4887-4
– 2 – IEC 61558-1:2017 RLV © IEC 2017
CONTENTS
FOREWORD . 9
INTRODUCTION . 12
1 Scope . 15
2 Normative references . 17
3 Terms and definitions . 21
3.1 Transformers . 21
3.2 General terms . 25
3.3 Operations and protections . 26
3.4 Circuits and windings . 28
3.5 Ratings . 29
3.6 No-load values . 31
3.7 Insulation . 31
3.8 Touch current and protective earthing conductor current . 35
4 General requirements . 35
5 General notes on tests . 36
6 Ratings . 38
7 Classification . 39
8 Marking and other information . 40
9 Protection against electric shock . 47
9.1 General . 47
9.2 Protection against contact with hazardous-live-parts . 47
9.2.1 Determination of hazardous-live-parts . 47
9.2.2 Accessibility to hazardous-live-parts . 47
9.2.3 Accessibility to non hazardous-live-part . 51
9.3 Protection against hazardous electrical discharge . 51
10 Change of input voltage setting . 52
11 Output voltage and output current under load . 52
12 No-load output voltage . 53
13 Short-circuit voltage. 53
14 Heating . 53
14.1 General requirements . 53
14.1.1 Temperature-rise test . 53
14.1.2 Alternative temperature-rise test . 55
14.1.3 Determination of steady-state conditions . 58
14.2 Application of 14.1 or 14.3 according to the insulation system . 60
14.3 Accelerated ageing test for undeclared class of insulation system . 60
14.3.1 General . 60
14.3.2 Heat run . 61
14.3.3 Vibration . 61
14.3.4 Moisture treatment . 61
14.3.5 Measurements . 62
15 Short circuit and overload protection . 62
15.1 General requirements . 62
15.1.1 Short circuit and overload test method . 62
15.1.2 Alternative short circuit and overload test method . 64
15.2 Inherently short-circuit proof transformers . 64
15.3 Non-inherently short-circuit proof transformers . 64
15.4 Non-short-circuit proof transformers . 65
15.5 Fail-safe transformers . 65
16 Mechanical strength . 66
16.1 General . 66
16.2 Stationary transformers . 66
16.3 Portable transformers (except portable transformers with integral pins for
introduction in socket-outlet in the fixed wiring) . 67
16.4 Portable transformers provided with integral pins for introduction in socket-
outlets of the fixed wiring . 67
16.4.1 General requirements . 67
16.4.2 Portable transformers provided with integral pins according to EN
50075 (IEC plug type C) for introduction in socket-outlets of the fixed
wiring . 68
16.5 Additional requirements for transformers to be used in vehicles and railway
applications . 69
16.5.1 Transformers to be used in vehicles and railway applications . 69
16.5.2 Test requirements for the transportation of transformers . 70
17 Protection against harmful ingress of dust, solid objects and moisture . 71
17.1 Degrees of protection provided by enclosures (IP code) . 71
17.1.1 General requirements . 71
17.1.2 Tests on transformers with enclosure . 72
17.2 Humidity treatment . 75
18 Insulation resistance, dielectric strength and leakage current . 75
18.1 General . 75
18.2 Insulation resistance . 76
18.3 Dielectric strength test . 76
18.4 Insulation between and within windings . 79
18.5 Touch current and protective earthing conductor current . 79
18.5.1 General . 79
18.5.2 Touch current . 80
18.5.3 Protective earthing conductor current . 81
19 Construction . 82
19.1 General construction . 82
19.1.1 General . 82
19.1.2 Auto-transformers . 82
19.1.3 Separating transformers . 83
19.1.4 Isolating transformers and safety isolating transformers . 84
19.2 Flammability of materials . 86
19.3 Short-circuit characteristics of portable transformers . 86
19.4 Class II transformer contact prevention of accessible conductive parts . 86
19.5 Class II transformer insulation reassembling after service . 86
19.6 Loosening of wires, screws or similar parts . 87
19.7 Resistor or capacitor connection with accessible conductive parts . 87
19.8 Bridging of separated conductive parts by resistors or capacitors . 87
19.9 Insulating material separating input and output windings . 88
19.10 Accidental contact protection against hazardous-live-parts provided by
isolating coating . 88
-------------------
...
IEC 61558-1 ®
Edition 3.0 2017-09
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
GROUP SAFETY PUBLICATION
PUBLICATION GROUPÉE DE SÉCURITÉ
Safety of transformers, reactors, power supply units and combinations thereof –
Part 1: General requirements and tests
Sécurité des transformateurs, bobines d’inductance, blocs d’alimentation et
des combinaisons de ces éléments –
Partie 1: Exigences générales et essais
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
your local IEC member National Committee for further information.
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Switzerland www.iec.ch
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.
About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigenda or an amendment might have been published.
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Technical Specifications, Technical Reports and other English and French, with equivalent terms in 16 additional
documents. Available for PC, Mac OS, Android Tablets and languages. Also known as the International Electrotechnical
iPad. Vocabulary (IEV) online.
IEC publications search - www.iec.ch/searchpub IEC Glossary - std.iec.ch/glossary
The advanced search enables to find IEC publications by a 65 000 electrotechnical terminology entries in English and
variety of criteria (reference number, text, technical French extracted from the Terms and Definitions clause of
committee,…). It also gives information on projects, replaced IEC publications issued since 2002. Some entries have been
and withdrawn publications. collected from earlier publications of IEC TC 37, 77, 86 and
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IEC 61558-1 ®
Edition 3.0 2017-09
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
GROUP SAFETY PUBLICATION
PUBLICATION GROUPÉE DE SÉCURITÉ
Safety of transformers, reactors, power supply units and combinations thereof –
Part 1: General requirements and tests
Sécurité des transformateurs, bobines d’inductance, blocs d’alimentation et
des combinaisons de ces éléments –
Partie 1: Exigences générales et essais
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.180 ISBN 978-2-8322-4750-1
– 2 – IEC 61558-1:2017 © IEC 2017
CONTENTS
FOREWORD . 9
INTRODUCTION . 11
1 Scope . 14
2 Normative references . 16
3 Terms and definitions . 19
3.1 Transformers . 20
3.2 General terms . 23
3.3 Operations and protections . 24
3.4 Circuits and windings . 26
3.5 Ratings . 27
3.6 No-load values . 29
3.7 Insulation . 29
3.8 Touch current and protective earthing conductor current . 33
4 General requirements . 33
5 General notes on tests . 34
6 Ratings . 36
7 Classification . 36
8 Marking and other information . 37
9 Protection against electric shock . 43
9.1 General . 43
9.2 Protection against contact with hazardous-live-parts . 44
9.2.1 Determination of hazardous-live-parts . 44
9.2.2 Accessibility to hazardous-live-parts . 44
9.2.3 Accessibility to non hazardous-live-part . 47
9.3 Protection against hazardous electrical discharge . 47
10 Change of input voltage setting . 47
11 Output voltage and output current under load . 48
12 No-load output voltage . 49
13 Short-circuit voltage . 49
14 Heating . 49
14.1 General requirements . 49
14.1.1 Temperature-rise test . 49
14.1.2 Alternative temperature-rise test . 51
14.1.3 Determination of steady-state conditions . 54
14.2 Application of 14.1 or 14.3 according to the insulation system. 55
14.3 Accelerated ageing test for undeclared class of insulation system . 56
14.3.1 General . 56
14.3.2 Heat run . 56
14.3.3 Vibration . 57
14.3.4 Moisture treatment . 57
14.3.5 Measurements . 57
15 Short circuit and overload protection. 57
15.1 General requirements . 57
15.1.1 Short circuit and overload test method . 57
15.1.2 Alternative short circuit and overload test method . 60
15.2 Inherently short-circuit proof transformers . 60
15.3 Non-inherently short-circuit proof transformers. 60
15.4 Non-short-circuit proof transformers . 61
15.5 Fail-safe transformers . 61
16 Mechanical strength . 62
16.1 General . 62
16.2 Stationary transformers . 62
16.3 Portable transformers (except portable transformers with integral pins for
introduction in socket-outlet in the fixed wiring) . 63
16.4 Portable transformers provided with integral pins for introduction in socket-
outlets of the fixed wiring . 63
16.4.1 General requirements . 63
16.4.2 Portable transformers provided with integral pins according to EN
50075 (IEC plug type C) for introduction in socket-outlets of the fixed
wiring . 64
16.5 Additional requirements for transformers to be used in vehicles and railway
applications . 65
16.5.1 Transformers to be used in vehicles and railway applications . 65
16.5.2 Test requirements for the transportation of transformers . 66
17 Protection against harmful ingress of dust, solid objects and moisture . 67
17.1 Degrees of protection provided by enclosures (IP code) . 67
17.1.1 General requirements . 67
17.1.
...
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