IEC 60255-11:2008

IEC 60255-11
Edition 2.0 2008-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Measuring relays and protection equipment –
Part 11: Voltage dips, short interruptions, variations and ripple on auxiliary
power supply port
Relais de mesure et dispositifs de protection –
Partie 11: Creux de tension, coupures brèves, variations et ondulation sur
l’accès alimentation auxiliaire

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IEC 60255-11
Edition 2.0 2008-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Measuring relays and protection equipment –
Part 11: Voltage dips, short interruptions, variations and ripple on auxiliary
power supply port
Relais de mesure et dispositifs de protection –
Partie 11: Creux de tension, coupures brèves, variations et ondulation sur
l’accès alimentation auxiliaire

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
L
CODE PRIX
ICS 29.120.70 ISBN 978-2-88910-075-0
– 2 – 60255-11 © IEC:2008
CONTENTS
FOREWORD.3
1 Scope and object.5
2 Normative references .5
3 Terms and definitions .6
4 Requirements .6
4.1 Test levels.6
4.2 Test requirements .6
5 Test equipment.8
6 Test set-up .8
6.1 General .8
6.2 Voltage dips .8
6.3 Voltage interruptions .8
6.4 Alternating component in d.c. (ripple) .8
6.5 Gradual shut-down/start-up test .8
6.6 Polarity inversion.9
7 Test procedure .9
8 Criteria for acceptance .9
9 Test report.10
Bibliography.11

Figure 1 – Gradual shut down/start up test.8

Table 1 – Type, levels and duration of tests .7
Table 2 – Criteria for acceptance .9

60255-11 © IEC:2008 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
MEASURING RELAYS AND PROTECTION EQUIPMENT –

Part 11: Voltage dips, short interruptions, variations
and ripple on auxiliary power supply port

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
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between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
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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.
International Standard IEC 60255-11 has been prepared by IEC technical committee 95:
Measuring relays and protection equipment.
This second edition cancels and replaces the first edition published in 1979. This edition
constitutes a technical revision. The main differences with respect to the previous edition
concern:
• addition of voltage dips and interruptions test in a.c.;
• addition of gradual shut-down/start-up test;
• addition of reversal of d.c. power supply polarity test.

– 4 – 60255-11 © IEC:2008
The text of this standard is based on the following documents:
FDIS Report on voting
95/239/FDIS 95/244/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 2.
A list of all parts of IEC 60255 series, published under the general title Measuring relays and
protection equipment, can be found on the IEC website.
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.
60255-11 © IEC:2008 – 5 –
MEASURING RELAYS AND PROTECTION EQUIPMENT –

Part 11: Voltage dips, short interruptions, variations
and ripple on auxiliary power supply port

1 Scope and object
This part of the IEC 60255 series specifies the general requirements for a.c. and d.c. power
supplies, for measuring relays and protection equipment for power system protection,
including the control, monitoring and process interface equipment used with those systems.
This part is based on:
• IEC 61000-4-11 for a.c. voltage dips, short interruptions and variations;
• IEC 61000-4-17 for voltage ripple;
• IEC 61000-4-29 for d.c. voltage dips, short interruptions and variations.
The objective of the tests is to confirm that the equipment under test will operate correctly
when energised and subjected to dips, interruptions and alternating components (ripple).
The requirements specified in this standard are applicable to measuring relays and protection
equipment in a new condition and all tests specified are type tests only.
The object of this standard is to state:
• definitions of terms used;
• test severity levels;
• test equipment;
• test set-up;
• test procedure;
• criteria for acceptance;
• test report.
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 60255-6, Electr
...