SIST EN 60549:2013

SLOVENSKI STANDARD
SIST EN 60549:2013
01-september-2013
9LVRNRQDSHWRVWQHYDURYDONH]D]XQDQMR]DãþLWRY]SRUHGQLKNRQGHQ]DWRUMHY,(&

High-voltage fuses for the external protection of shunt capacitors (IEC 60549:2013)
Hochspannungssicherungen für den externen Schutz von Parallelkondensatoren (IEC
60549:2013)
Coupe-circuit à fusibles haute tension destinés à la protection externe des
condensateurs des condensateurs shunt (CEI 60549:2013)
Ta slovenski standard je istoveten z: EN 60549:2013
ICS:
29.120.50 9DURYDONHLQGUXJD Fuses and other overcurrent
PHGWRNRYQD]DãþLWD protection devices
31.060.01 Kondenzatorji na splošno Capacitors in general
SIST EN 60549:2013 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 60549:2013

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SIST EN 60549:2013

EUROPEAN STANDARD
EN 60549

NORME EUROPÉENNE
June 2013
EUROPÄISCHE NORM

ICS 29.120.50


English version


High-voltage fuses for the external protection of shunt capacitors
(IEC 60549:2013)


Coupe-circuit à fusibles haute tension Hochspannungssicherungen für den
destinés à la protection externe des externen Schutz von
condensateurs shunt Parallelkondensatoren
(CEI 60549:2013) (IEC 60549:2013)





This European Standard was approved by CENELEC on 2013-05-28. CENELEC members are bound to comply
with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard
the status of a national standard without any alteration.

Up-to-date lists and bibliographical references concerning such national standards may be obtained on
application to the CEN-CENELEC Management Centre or to any CENELEC member.

This European Standard exists in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CENELEC member into its own language and notified
to the CEN-CENELEC Management Centre has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus,
the Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany,
Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland,
Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Management Centre: Avenue Marnix 17, B - 1000 Brussels


© 2013 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 60549:2013 E

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SIST EN 60549:2013
EN 60549:2013 - 2 -

Foreword
The text of document 32A/294/CDV, future edition 2 of IEC 60549, prepared by SC 32A, "High voltage
fuses", of IEC/TC 32, "Fuses" was submitted to the IEC-CENELEC parallel vote and approved by
CENELEC as EN 60549:2013.
The following dates are fixed:
• latest date by which the document has (dop) 2014-02-28
to be implemented at national level by
publication of an identical national
standard or by endorsement
(dow) 2016-05-28
• latest date by which the national
standards conflicting with the

document have to be withdrawn

Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such patent
rights.
Endorsement notice
The text of the International Standard IEC 60549:2013 was approved by CENELEC as a European
Standard without any modification.

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SIST EN 60549:2013
- 3 - EN 60549:2013
Annex ZA
(normative)

Normative references to international publications
with their corresponding European publications

The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.

NOTE  When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD
applies.

Publication Year Title EN/HD Year

IEC 60282-1 2009 High-voltage fuses - EN 60282-1 2009
Part 1: Current-limiting fuses


IEC 60282-2 - High-voltage fuses - - -
Part 2: Expulsion fuses


IEC 60871-1 - Shunt capacitors for a.c. power systems EN 60871-1 -
having a rated voltage above 1 000 V -
Part 1: General

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SIST EN 60549:2013

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SIST EN 60549:2013



IEC 60549

®


Edition 2.0 2013-04




INTERNATIONAL



STANDARD




NORME



INTERNATIONALE











High-voltage fuses for the external protection of shunt capacitors



Coupe-circuit à fusibles haute tension destinés à la protection externe des


condensateurs shunt

















INTERNATIONAL

ELECTROTECHNICAL

COMMISSION


COMMISSION

ELECTROTECHNIQUE

PRICE CODE
INTERNATIONALE

CODE PRIX P


ICS 29.120.50 ISBN 978-2-83220-743-7



Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale

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SIST EN 60549:2013
– 2 – 60549 © IEC:2013
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Performance requirements . 7
4.1 General . 7
4.2 Breaking requirements . 7
4.2.1 Rated maximum capacitive breaking current . 7
4.2.2 Rated capacitor discharge energy. 7
5 Type tests . 8
5.1 General . 8
5.2 Test practices . 8
5.3 Power frequency inductive current tests . 8
5.4 Capacitive breaking current tests . 9
5.4.1 Description of tests to be made . 9
5.4.2 Test circuits . 9
5.4.3 Arrangement of the equipment . 10
5.4.4 Test procedure . 11
5.4.5 Parameters to be used for tests . 12
5.4.6 Test I for fuse-links that exhibit take-over current(s) . 12
t
5.5 Capacitor Discharge breaking tests . 13
5.5.1 General . 13
5.5.2 Test circuit. 13
5.5.3 Test procedure . 14
5.6 Standard conditions of behaviour with respect to breaking tests . 14
6 Information to be given to the user . 14
7 Application information . 14
7.1 Operating voltages . 14
7.2 Rated voltage . 15
7.3 Rated current . 15
Bibliography . 16

Figure 1 – Test circuit for test duty A . 11
Figure 2 – Test circuit for test duty B . 11

Table 1 – Type tests required . 8
Table 2 – Capacitive current breaking tests . 12

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SIST EN 60549:2013
60549 © IEC:2013 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________

HIGH-VOLTAGE FUSES FOR THE EXTERNAL
PROTECTION OF SHUNT CAPACITORS


FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 60549 has been prepared by subcommittee 32A: High voltage
fuses, of IEC technical committee 32: Fuses.
This second edition cancels and replaces the first edition published in 1976. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) alignment of the document with current IEC document structure requirements;
b) clarification of certain test requirements.

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SIST EN 60549:2013
– 4 – 60549 © IEC:2013
The text of this standard is based on the following documents:
CDV Report on voting
32A/294/CDV 32A/298/RVC

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 2.
The committee has decided that the contents of this publication 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.

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SIST EN 60549:2013
60549 © IEC:2013 – 5 –
HIGH-VOLTAGE FUSES FOR THE EXTERNAL
PROTECTION OF SHUNT CAPACITORS



1 Scope
This standard applies to external fuses used with high-voltage capacitors according to
IEC 60871-1, Shunt capacitors for a.c. power systems having a rated voltage above 1 000 V –
Part 1: General. IEC 60871-1 is applicable to both capacitor units and capacitor banks
intended to be used, particularly, for power-factor correction of a.c. power systems, and also
to capacitors intended for use in power filter circuits.
Fuses according to this standard are intended to clear either faults inside a capacitor unit to
permit continued operation of the remaining parts of the bank in which the unit is connected
(unit fuses) or faults on the whole capacitor bank to isolate the bank from the system (line
fuses).
In this standard the terms “capacitive current” and “inductive current” are used to indicate test
currents that have a leading or lagging power factor, respectively, and in which the circuit
contains predominantly capacitive or inductive components. The word "capacitor" is used
when it is not necessary to lay particular stress upon the different meanings of the word
"capacitor unit" or "capacitor bank".
In some cases, fuses tested only to IEC 60282-1 or IEC 60282-2 may be suitable for use with
capacitors if they are not required to interrupt capacitive currents (e.g. if capacitive currents
cannot flow, or if they are acting as a “back-up”, to provide high inductive current breaking, to
other devices that will clear capacitive currents).
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and
are indispensable for its application. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any
amendments) applies.
IEC 60282-1:2009, High-voltage fuses – Part 1: Current-limiting fuses
IEC 60282-2, High-voltage Fuses – Part 2: Expulsion Fuses
IEC 60871-1, Shunt capacitors for ac power systems having a rated voltage above 1 000 V –
Part 1: General
3 Terms and definitions
For the purposes of this document, the following definitions apply.
3.1
(capacitor) element
a device consisting essentially of two electrodes separated by a dielectric
[SOURCE: IEC 60050-436:1990, 436-01-03]

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SIST EN 60549:2013
– 6 – 60549 © IEC:2013
3.2
(capacitor) unit
an assembly of one or more capacitor elements in the same container with terminals brought
out
[SOURCE: IEC 60050-436:1990, 436-01-04]
3.3
(capacitor) bank
a number of capacitor units connected so as to act together
[SOURCE: IEC 60050-436:1990, 436-01-06]
3.4
unit fuse
fuse intended to be used for the protection of a capacitor unit which forms a part of a
capacitor bank
3.5
line fuse
fuse intended to be used for the overall protection of a capacitor connected to a given point of
a system
3.6
rated voltage of a capacitor
U
r
the r.m.s. value of the alternating voltage for which the capacitor has been designed
Note 1 to entry: In the case of capacitors consisting of one or more separate circuits (for example single phase
units intended for use in polyphase connection, or polyphase units with separate circuits), U refers to the rated
r
voltage of each circuit.
Note 2 to entry: For polyphase capacitors with internal electrical connections between phases, and for polyphase
capacitor banks, U refers to the phase-to-phase voltage.
r
[SOURCE: IEC 60050-436:1990, 436-01-15, modified by addition of symbol and notes to
entry]
3.7
refill unit
a set of replacement parts sufficient to restore a fuse-link to its original condition after an
operation
[SOURCE: IEC 60050-441:2007, 441-18-15]
3.8
capacitive breaking current
current for which the specified conditions of use and behaviour include the opening of the
circuit that includes capacitor elements and/or capacitor units in series with the fuse
3.9
rated maximum capacitive breaking current
maximum capacitive breaking current that the fuse shall be capable of breaking under the
conditions of use and behaviour prescribed in this standard

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SIST EN 60549:2013
60549 © IEC:2013 – 7 –
3.10
rated capacitor discharge energy
Joule rating
stored energy in a capacitor that a fuse has been shown to be capable of withstanding during
a capacitor discharge breaking test
4 Performance requirements
4.1 General
These fuses are not a substitute for a mechanical switching device, but when forming a part of
a mechanical switching device such as a fused switch or a fused disconnector, they shall
comply with this standard.
When fuses are used for the external protection of a capacitor unit or a capacitor bank (line
fuses), their voltages and breaking ratings shall be adequate for the system.
Fuses according to this standard shall comply with the requirements of IEC 60282-1 or
IEC 60282-2, except those which are specifically excluded in this standard.
The fuse is connected in series with the unit(s) that the fuse is intended to isolate if the unit(s)
become(s) faulty. The range in currents and voltages for the fuse is therefore dependent on
the characteristics of the capacitor and the bank in which the fuse is connected as well as the
parameters of the supply circuit.
The operation of an external fuse is, in general, determined by the following two factors:
a) the power-frequency fault current resulting from either a partial or complete capacitor
failure;
b) the discharge energy from any units in parallel with the fault.
However, this standard gives a method of separate checking of these factors.
These requirements are valid for capacitors switched by a switching device with a very low
probability of restrike during interruption. If this is not the case, other requirements are to be
agreed upon.
As used in this standard, U is the rated voltage of the capacitor unit and U is the rated
r rf
voltage of the capacitor fuse.
4.2 Breaking requirements
4.2.1 Rated maximum capacitive breaking current
The preferred rated maximum capacitive breaking currents for capacitor fuses are 1 kA r.m.s.,
2,5 kA r.m.s., 3,15 kA r.m.s., 4 kA r.m.s., and 5 kA r.m.s. Other values shall be the subject of
an agreement between manufacturer and user.
4.2.2 Rated capacitor discharge energy
A rated capacitor discharge energy (joule rating) is assigned to a fuse based on the energy
stored in a capacitor test bank prior to the time it is discharged through the fuse in the
capacitor discharge breaking tests (5.5). Values should be selected from R10 series with a
minimum of 10 kJ. The preferred value for current-limiting fuses is 40 kJ. To assign an
“unlimited
...