IEC 61558-2-14:2012

Safety of transformers, reactors, power supply units and combinations thereof - Part 2-14: Particular requirements and tests for variable transformers and power supply units incorporating variable transformers

IEC 61558-2-14:2012 deals with safety of variable transformers for general applications and power supply units incorporating variable transformers for general applications. Transformers incorporating electronic circuits are also covered by this standard. This first edition cancels and replaces the chapter IV of the IEC 60989 published in 1991. It is a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
a) update of the existing text;
b) complete editorial review.
This part has the status of a group safety publication in accordance with IEC Guide 104:2010. The preparation of safety publications and the use of basic safety publications and group safety publications. The attention of National Committees is drawn to the fact that equipment manufacturers and testing organizations may need a transitional period following publication of a new, amended or revised IEC publication in which to make products in accordance with the new requirements and to equip themselves for conducting new or revised tests. It is the recommendation of the committee that the content of this publication be adopted for implementation nationally not earlier than 12 months from the date of publication.
This publication is to be read in conjunction with IEC 61558-1:2005.

Sécurité des transformateurs, bobines d'inductance, blocs d'alimentation et des combinaisons de ces éléments - Partie 2-14: Exigences particulières et essais pour les transformateurs variables et les blocs d'alimentation incorporant des transformateurs variables

La CEI 61558-2-14:2012 traite de la sécurité des transformateurs variables pour applications générales et des blocs d'alimentation incorporant des transformateurs variables pour applications générales. Les transformateurs incorporant des circuits électroniques sont également couverts par la présente norme. Cette première édition annule et remplace le chapitre IV de la CEI 60989 parue en 1991. Elle constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
a) mise à jour du texte existant;
b) revue éditoriale complète.
La présente partie a le statut de publication groupée de sécurité conformément au guide CEI 104:2010. The preparation of safety publications and the use of basic safety publications and group safety publications (disponible en anglais seulement). L'attention des Comités Nationaux est attirée sur le fait que les fabricants d'appareils et les organismes d'essai peuvent avoir besoin d'une période transitoire après la publication d'une nouvelle publication CEI, ou d'une publication amendée ou révisée, pour fabriquer des produits conformes aux nouvelles exigences et pour adapter leurs équipements aux nouveaux essais ou aux essais révisés. Le comité recommande que le contenu de cette publication soit entériné au niveau national au plus tôt 12 mois après la date de publication.
Cette publication doit être lue conjointement avec la CEI 61558-1:2005.

General Information

• Status: Published
• Publication Date: 21-Nov-2012
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 29.180 - Transformers. Reactors
• Technical Committee: TC 96 - Transformers, reactors, power supply units, and combinations thereof
• Current Stage: DELPUB - Deleted Publication
• Start Date: 31-Mar-2021
• Completion Date: 02-May-2022

Relations

• Revised: IEC 61558-2-14:2022 - Safety of transformers, reactors, power supply units and combinations thereof - Part 2-14: Particular requirements and tests for variable transformers and power supply units incorporating variable transformers for general applications
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 61558-2-14 ®
Edition 1.0 2012-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
GROUP SAFETY PUBLICATION
PUBLICATION GROUPÉE DE SÉCURITÉ
Safety of transformers, reactors, power supply units and combination thereof –
Part 2-14: Particular requirements and tests for variable transformers and power
supply units incorporating variable transformers

Sécurité des transformateurs, bobines d’inductance, blocs d’alimentation et des
combinaisons de ces éléments –
Partie 2-14: Exigences particulières et essais pour les transformateurs variables
et les blocs d’alimentation incorporant des transformateurs variables

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IEC 61558-2-14 ®
Edition 1.0 2012-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
GROUP SAFETY PUBLICATION
PUBLICATION GROUPÉE DE SÉCURITÉ

Safety of transformers, reactors, power supply units and combination thereof –

Part 2-14: Particular requirements and tests for variable transformers and power

supply units incorporating variable transformers

Sécurité des transformateurs, bobines d’inductance, blocs d’alimentation et des

combinaisons de ces éléments –

Partie 2-14: Exigences particulières et essais pour les transformateurs variables

et les blocs d’alimentation incorporant des transformateurs variables

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX T
ICS 29.180 ISBN 978-2-83220-499-3

– 2 – 61558-2-14 © IEC:2012
CONTENTS
FOREWORD . 3
1 Scope . 6
2 Normative references . 8
3 Terms and definitions . 8
4 General requirements . 9
5 General notes on tests . 9
6 Ratings . 10
7 Classification . 10
8 Marking and other information . 10
9 Protection against electric shock . 12
10 Change of input voltage setting . 12
11 Output voltage and output current under load . 12
12 No-load output voltage . 12
13 Short-circuit voltage . 14
14 Heating . 15
15 Short circuit and overload protection . 15
16 Mechanical strength . 15
17 Protection against harmful ingress of dust, solid objects and moisture . 16
18 Insulation resistance, dielectric strength and leakage current . 16
19 Construction . 16
20 Components . 20
21 Internal wirings . 20
22 Supply connection and other external flexible cables or cords . 20
23 Terminals for external conductors . 20
24 Provision for protective earthing . 20
25 Screws and connections . 21
26 Creepage distances, clearances and distances through insulation . 21
27 Resistance to heat, fire and tracking . 21
28 Resistance to rusting . 21
Annexes . 22
Bibliography . 23

Table 101 – Output voltages difference for auto transformers, separating and safety
isolating transformers . 14
Table 102 – Output voltages difference for isolating transformers . 14
Table 103 – Maximum permitted temperatures of the winding . 15

61558-2-14 © IEC:2012 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
SAFETY OF TRANSFORMERS, REACTORS,
POWER SUPPLY UNITS AND COMBINATION THEREOF –

Part 2-14: Particular requirements and tests for variable transformers
and power supply units incorporating variable transformers

FOREWORD
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International standard IEC 61558-2-14 has been prepared by technical committee 96:
Transformers, reactors, power supply units and combination thereof.
This first edition cancels and replaces the chapter IV of the IEC 60989 published in 1991. It is a
technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) update of the existing text;
b) complete editorial review.
– 4 – 61558-2-14 © IEC:2012
The text of this standard is based on the followi
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