IEC 60255-11:2008

Measuring relays and protection equipment - Part 11: Voltage dips, short interruptions, variations and ripple on auxiliary power supply port

IEC 60255-11:2008 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. 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 main differences with respect to the previous edition are as follows: 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.

Relais de mesure et dispositifs de protection - Partie 11: Creux de tension, coupures brèves, variations et ondulation sur l'accès alimentation auxiliaire

La CEI 60255-11:2008 spécifie les prescriptions générales pour les alimentations auxiliaires en courant continu et en courant alternatif, pour les relais de mesure et les dispositifs de protection des systèmes de protection, y compris les équipements de contrôle, de supervision et d'interface avec le processus utilisés avec ces systèmes. L'objectif de ces essais est de confirmer que le matériel sous test fonctionnera correctement lorsqu'il sera alimenté et soumis à des creux, des coupures et des composantes alternatives (ondulations) de tension. Les principales différences par rapport à l'édition précédente sont les suivantes: ajout essais creux et coupures en c.a.; ajout essais coupure rétablissement progressifs; ajout essais inversion de polarité en c.c.

General Information

• Status: Replaced
• Publication Date: 07-Oct-2008
• ICS: 29.120.70 - Relays
• Technical Committee: TC 95 - Measuring relays and protection equipment
• Drafting Committee: MT 2 - TC 95/MT 2
• Current Stage: DELPUB - Deleted Publication
• Completion Date: 24-May-2013

Relations

• Replaced By: IEC 60255-26:2013 - Measuring relays and protection equipment - Part 26: Electromagnetic compatibility requirements
• Effective Date: 05-Sep-2023

Standards Content (Sample)

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

IEC 60255-11:2008

---------------------- Page: 1 ----------------------
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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
® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale

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– 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

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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
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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
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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.

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– 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.

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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, Electrical relays – Part 6: Measuring relays and protection equipment
IEC 61000-4-11, Electromagnetic compatibility (EMC) – Part 4-11: Testing and measurement
techniques – Voltage dips, short interruptions and voltage variations immunity tests
IEC 61000-4-17, Electromagnetic compatibility (EMC) – Part 4-17: Testing and measurement
techniques – Ripple on d.c. input power port immunity test
IEC 61000-4-29, Electromagnetic compatibility (EMC) – Part 4-29: Testing and measurement
techniques – Voltage dips, short interruptions and voltage variations on d.c. input power port
immunity tests

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3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
type test
conformity test made on one or more items representative of the production
[IEV 151-16-16]
3.2
equipment under test
EUT
equipment which may be either a measuring relay or a protection equipment
3.3
auxiliary power supply port
AC or d.c. auxiliary energising input of the EUT
NOTE Ports connected to voltage transformer (VT) or current transformer (CT) are not covered by this standard.
3.4
alternating component

A
c
alternating component in d.c. is defined as:
U −U
max min
A = 100 , in %
c
U
0
where
U = maximum instantaneous voltage;
max
U = minimum instantaneous voltage;
min
U = d.c. component.
0
[IEV 161-02-26, modified]
4 Requirements
4.1 Test levels
It is important that the effects of the tests should be assessed at the maximum and minimum
values of the voltage according to the product technical documentation.
The voltages in this standard use the rated voltage for the equipment (U ) as a basis for
T
voltage test level specification. Where the equipment has a rated voltage range, the test
procedure shall be applied for both the lowest and highest voltages declared in the voltage
range.
EXAMPLE A product with a rated voltage range of 100 V to 200 V ± 20 % should be tested at 80 V and 240 V.
4.2 Test requirements
Products shall be tested as described in Table 1. For products intended to be powered by d.c.
power supply, only the corresponding tests shall be done. For products intended to be
powered by a.c. power supply, only the corresponding tests shall be done. For products
intended to be powered either by a.c. power supply or by d.c. power supply, both tests shall
be done.

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60255-11 © IEC:2008                 – 7 –

Table 1 – Type, levels and duration of tests

Row Type of phenomena Test specifications Units Basic standards Criterion for acceptance
1a Voltage dips 0 % residual voltage A
b
(for d.c. power supply) 10 to 1000 ms
IEC 61000-4-29
40 % residual voltage C
200 ms
70 % residual voltage C
500 ms
1b Voltage dips 0 % residual voltage A
a
(for a.c. power supply) 0,5 to 25 cycles
IEC 61000-4-11
40 % residual voltage C
10/12 at 50/60 Hz cycles
70 % residual voltage C
25/30 at 50/60 Hz cycles
2a Voltage interruptions 0 % residual voltage IEC 61000-4-29 C
(for d.c. power supply) 5 s
2b Voltage interruptions 0 % residual voltage IEC 61000-4-11 C
(for a.c. power supply) 250/300 at 50/60 Hz cycles
3 Alternating component in d.c. (ripple) 15 % of rated d.c. value V IEC 61000-4-17 A
c
(for d.c. power supply) 100/120 at 50/60 Hz  Hz, sinusoidal waveform
4 Gradual shut-down/start-up 60 s, shut-down ramp --- C
(for d.c. power supply) 5 min, power off
60 s, start-up ramp
5 1 min --- C
Reversal of d.c. power supply
polarity
a
Manufacturer shall declare the duration among the following values: 0,5 cycle, 1 cycle, 2,5 cycles, 5 cycles, 10 cycles, 25 cycles.
b
Manufacturer shall declare the duration among the following values: 10 ms, 20 ms, 30 ms, 50 ms, 100 ms, 200 ms, 300 ms, 500 ms or 1 000 ms.
c
Test shall be done at a frequency of twice the specified power system frequency(ies).

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5 Test equipment
For a.c. tests, test equipment shall comply with IEC 61000-4-11.
For alternating component in d.c., test equipment shall comply with IEC 61000-4-17. For other
d.c. tests, test equipment shall comply with IEC 61000-4-29.
6 Test set-up
6.1 General
IEC 60255-6 standard applies.
The protection relay shall be in a quiescent state.
Half of the binary inputs and half of the output relays shall be energised.
Communication modules, if any, shall be activated.
6.2 Voltage dips
See IEC 61000-4-11 for a.c. dips.
See IEC 61000-4-29 for d.c. dips.
6.3 Voltage interruptions
See IEC 61000-4-11 for a.c. interruptions.
See IEC 61000-4-29 for d.c. interruptions.
6.4 Alternating component in d.c. (ripple)
See IEC 61000-4-17.
6.5 Gradual shut-down/start-up test
Figure 1 below shows how to test products.

IEC  1731/08
Figure 1 – Gradual shut down/start up test

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60255-11 © IEC:2008 – 9 –
6.6 Polarity inversion
Reverse polarity for power supply inputs shall be applied for 1 min. The results shall be stated
and documented by the manufacturer.
7 Test procedure
The tests shall be carried out at the reference conditions given in IEC 61000-4-11,
IEC 61000-4-17, IEC 61000-4-29 and IEC 60255-6.
8 Criteria for acceptance
The criteria for acceptance are given in Table 2.
Table 2 – Criteria for acceptance
Criterion Function Criterion for acceptance
A Protection Normal performance within the specification limits, during and after
the test.
Command and control Normal performance within the specification limits, during and after
the test.
Measurement Temporary degradation during test, with self-recovery at the end of
the test. No loss of stored data.
Integral human-machine Temporary degradation or loss of function during test, with self-
interface and visual alarms recovery at the end of the test. No loss of stored data.
Data communication Possible bit error rate increase but no loss of transmitted data.
C Protection Normal performance within the specification limits, or a predefined
behaviour, e.g. temporary loss of function or switch-off, which is
clearly specified by the manufacturer until normal operation is
automatically resumed.
There shall be no unwanted operation.
Command and control Normal performance within the specification limits, or a predefined
behaviour, e.g. temporary loss of function or switch-off, which is
clearly specified by the manufacturer until normal operation is
automatically resumed.
There shall be no unwanted operation.
Measurement Temporary degradation during test, or a predefined behaviour, e.g.
temporary loss of function, w
...