EN 61558-2-13:2000
(Main)Safety of power transformers, power supply units and similar devices - Part 2-13: Particular requirements for auto-transformers for general use
Safety of power transformers, power supply units and similar devices - Part 2-13: Particular requirements for auto-transformers for general use
Deals with all aspects of safety such as electrical, thermal and mechanical. This part 2-13 of EN 61558 applies to stationary or portable, single-phase or polyphase, air-cooled (natural or forced), independent or associated auto-transformers, having a rated supply voltage not exceeding 1000 V a.c., a rated frequency not exceeding 500 Hz. This part 2-13 is intended to be used in conjunction with EN 61558-1. This standard replaces Chapter III of IEC 60989. It has the status of a group safety publication in accordance with IEC Guide 104.
Sicherheit von Transformatoren, Netzgeräten und dergleichen - Teil 2-13: Besondere Anforderungen an Spartransformatoren für allgemeine Anwendungen
Sécurité des transformateurs, blocs d'alimentation et analogues - Partie 2-13: Règles particulières pour les autotransformateurs pour usage général
Traite de tous les aspects de la sécurité tels qu'électrique, thermique et mécanique. La présente partie 2-13 de la EN 61558 est applicable aux autotransformateurs indépendants ou associés, à refroidissement par air (naturel ou forcé), monophasés ou polyphasés, fixes ou mobiles, ayant une tension primaire assignée ne dépassant pas 1000 V courant alternatif, une fréquence assignée ne dépassant pas 500 Hz. La présente partie 2-13 est destinée à être utilisée avec la EN 61558-1. La présente norme remplace le chapitre III de la CEI 60989. Elle a le statut de publication groupée de sécurité conformément au Guide CEI 104.
Safety of power transformers, power supply units and similar devices - Part 2-13: Particular requirements for auto-transformers for general use
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Standards Content (Sample)
SLOVENSKI STANDARD
01-junij-2000
Safety of power transformers, power supply units and similar devices - Part 2-13:
Particular requirements for auto-transformers for general use
Safety of power transformers, power supply units and similar devices -- Part 2-13:
Particular requirements for auto-transformers for general use
Sicherheit von Transformatoren, Netzgeräten und dergleichen -- Teil 2-13: Besondere
Anforderungen an Spartransformatoren für allgemeine Anwendungen
Sécurité des transformateurs, blocs d'alimentation et analogues -- Partie 2-13: Règles
particulières pour les autotransformateurs pour usage général
Ta slovenski standard je istoveten z: EN 61558-2-13:2000
ICS:
29.180 Transformatorji. Dušilke Transformers. Reactors
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
NORME CEI
INTERNATIONALE IEC
61558-2-13
INTERNATIONAL
Première édition
STANDARD
First edition
1999-10
PUBLICATION GROUPÉE DE SÉCURITÉ
GROUP SAFETY PUBLICATION
Sécurité des transformateurs, blocs d'alimentation
et dispositifs analogues –
Partie 2-13:
Règles particulières pour les autotransformateurs
pour usage général
Safety of power transformers, power supply units
and similar devices –
Part 2-13:
Particular requirements for auto-transformers
for general use
IEC 1999 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
utilisée sous quelque forme que ce soit et par aucun procédé, any form or by any means, electronic or mechanical,
électronique ou mécanique, y compris la photo-copie et les including photocopying and microfilm, without permission in
microfilms, sans l'accord écrit de l'éditeur. writing from the publisher.
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Telefax: +41 22 919 0300 e-mail: inmail@iec.ch IEC web site http://www.iec.ch
CODE PRIX
Commission Electrotechnique Internationale
M
PRICE CODE
International Electrotechnical Commission
Pour prix, voir catalogue en vigueur
For price, see current catalogue
– –
61558-2-13 © IEC:1999 3
CONTENTS
Page
FOREWORD . 5
Clause
1 Scope . 9
2 Normative references . 11
3 Definitions. 11
4 General requirements. 11
5 General notes on tests . 13
6 Ratings . 13
7 Classification . 13
8 Marking and other information . 15
9 Protection against accessibility to hazardous live parts . 15
10 Change of input voltage setting . 15
11 Output voltage and output current under load . 15
12 No-load output voltage . 17
13 Short-circuit voltage . 17
14 Heating . 19
15 Short-circuit and overload protection . 19
16 Mechanical strength . 19
17 Protection against harmful ingress of dust, solid objects and moisture . 19
18 Insulation resistance and electric strength . 19
19 Construction. 19
20 Components. 21
21 Internal wiring . 21
22 Supply connection and other external flexible cables or cords . 21
23 Terminals for external conductors. 21
24 Provision for protective earthing . 21
25 Screws and connections. 23
26 Creepage distances, clearances and distances through insulation . 23
27 Resistance to heat, abnormal heat, fire and tracking. 23
28 Resistance to rusting. 23
Annexes . 25
– –
61558-2-13 © IEC:1999 5
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
SAFETY OF POWER TRANSFORMERS, POWER SUPPLY UNITS
AND SIMILAR DEVICES –
Part 2-13: Particular requirements for auto-transformers
for general use
FOREWORD
1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of the 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, the IEC publishes International Standards. 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. The 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 the 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 National Committees.
3) The documents produced have the form of recommendations for international use and are published in the form
of standards, technical specifications, technical reports or guides and they are accepted by the National
Committees in that sense.
4) In order to promote international unification, IEC National Committees undertake to apply IEC International
Standards transparently to the maximum extent possible in their national and regional standards. Any
divergence between the IEC Standard and the corresponding national or regional standard shall be clearly
indicated in the latter.
5) The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with one of its standards.
6) Attention is drawn to the possibility that some of the elements of this International Standard may be the subject
of patent rights. The IEC shall not be held responsible for identifying any or all such patent rights.
International standard IEC 61558-2-13 has been prepared by IEC technical committee 96:
Small power transformers, reactors and power supply units: Safety requirements.
Future standards in this series will carry the new general title as cited above. Titles of existing
standards in this series will be updated at the time of the next revision.
It has the status of a group safety publication in accordance with IEC Guide 104: The
preparation of safety publications and the use of basic safety publications and group safety
publications (1997).
The text of this standard is based on the following documents:
FDIS Report on voting
96/131/FDIS 96/137/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.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 3.
– –
61558-2-13 © IEC:1999 7
The committee has decided that this publication remains valid until 2005-06.
At this date, in accordance with the committee’s decision, the publication will be
• reconfirmed;
• withdrawn;
• replaced by a revised edition, or
• amended.
This part 2-13 is intended to be used in conjunction with IEC 61558-1. It was established on the
basis of the first edition (1997) of that standard.
This part 2-13 supplements or modifies the corresponding clauses in IEC 61558-1, so as to
convert that publication into the IEC standard: Particular requirements for auto-transformers.
This standard replaces Chapter III of IEC 60989.
When a particular subclause of part 1 is not mentioned in this part 2-13, that subclause applies
as far as is reasonable. Where this standard states "addition", "modification" or "replacement",
the relevant text of part 1 is to be adapted accordingly.
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.
In the text of the standard the words in bold are defined in clause 3.
Subclauses which are additional to those in part 1 are numbered starting from 101;
supplementary annexes are entitled AA, BB, etc.
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61558-2-13 © IEC:1999 9
SAFETY OF POWER TRANSFORMERS, POWER SUPPLY UNITS
AND SIMILAR DEVICES –
Part 2-13: Particular requirements for auto-transformers
for general use
1 Scope
Replacement:
This International Standard deals with all aspects of safety such as electrical, thermal and
mechanical.
This part 2-13 of IEC 61558 applies to stationary or portable, single-phase or polyphase, air-
cooled (natural or forced), independent or associated auto-transformers, having a rated
supply voltage not exceeding 1 000 V a.c., a rated frequency not exceeding 500 Hz.
The core power does not exceed:
– 1 kVA for single-phase auto-transformers;
– 5 kVA for polyphase auto-transformers.
The rated output does not exceed:
– 20 kVA for single-phase auto-transformers;
– 100 kVA for polyphase auto-transformers.
This standard is also applicable to auto-transformers having a core power up to 40 kVA,
however such transformers are considered as special transformers and are subjected to an
agreement between the purchaser and the supplier. Such special auto-transformers have no
limitation for the rated output.
The no-load output voltage and the rated output voltage do not exceed 1 000 V a.c.
or 1 415 V ripple-free d.c.
For independent auto-transformers, the no-load output voltage and the rated output
voltage are not less than 50 V a.c. or 120 V ripple free d.c.
This standard is applicable to transformers where no insulation between circuits is required by
the installation rules or by the equipment specifications.
NOTE 1 – Normally, the transformers are intended to be associated with equipment to provide voltages different
from the supply voltage for the functional requirements of the equipment. The safety insulation may be provided by
other features of the equipment, such as the body.
This standard is applicable to dry-type transformers. The windings may be encapsulated or
non-encapsulated.
NOTE 2 – For transformers filled with liquid dielectric or pulverised material, such as sand, requirements are under
consideration.
NOTE 3 – Attention is drawn to the fact that:
– for transformers intended to be used in vehicles or on board ships or aircraft, additional requirements
may be necessary;
– for transformers intended to be used in tropical countries, special requirements may be necessary;
– in locations where special environmental conditions prevail, particular requirements may be necessary.
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61558-2-13 © IEC:1999 11
This standard also applies to transformers incorporating electronic circuits. This standard does
not apply to external circuits and their components intended to be connected to the input and
output terminals or socket-outlets of the transformer.
This standard does not apply to variable auto-transformers described in the IEC 60989.
2 Normative references
This clause of part 1 is applicable.
3 Definitions
This clause of part 1 is applicable except as follows:
Addition:
3.1.101
auto-transformer
A transformer in which input and output voltages derive from a common winding.
NOTE 1 – An auto-transformer may have tappings or supplementary windings for adjustment purposes (see
Figures 101 and 102).
NOTE 2 – For the purpose of this standard, transformers with windings separated at least by functional insulation
and electrically connected, will be treated as auto-transformers (see Figure 103).
IEC 1174/98 IEC 1175/98 IEC 1176/98
Figure 101 Figure 102 Figure 103
3.5.101
core power
The power which the core would transform if this core was used in a transformer with separate
windings at the same supply voltage, output voltage and frequency.
4 General requirements
This clause of part 1 is applicable.
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61558-2-13 © IEC:1999 13
5 General notes on tests
This clause of part 1 is applicable.
6 Ratings
This clause of part 1 is applicable except as follows:
Addition:
6.101 The rated output voltage shall not exceed 1 000 V a.c. or 1 415 V ripple-free d.c.
For independent auto-transformers the rated output voltage shall exceed 50 V a.c. or 120 V
ripple
...
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