IEC 60255-22-2:2008

IEC 60255-22-2
Edition 3.0 2008-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Measuring relays and protection equipment –
Part 22-2: Electrical disturbance tests – Electrostatic discharge tests

Relais de mesure et dispositifs de protection –
Partie 22-2: Essais d’influence électrique – Essais de décharge électrostatique

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IEC 60255-22-2
Edition 3.0 2008-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Measuring relays and protection equipment –
Part 22-2: Electrical disturbance tests – Electrostatic discharge tests

Relais de mesure et dispositifs de protection –
Partie 22-2: Essais d’influence électrique – Essais de décharge électrostatique

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
M
CODE PRIX
ICS 29.120.70 ISBN 2-8318-9709-2

– 2 – 60255-22-2 © IEC:2008
CONTENTS
FOREWORD.3
1 Scope and object.5
2 Normative references .5
3 Terms and definitions.6
4 Test severity level .6
5 Test equipment.7
6 Test set-up .7
7 Test procedures .9
8 Criteria for acceptance .11
9 Test report.11
Annex A (informative) .12

Figure 1 – Example of test set-up with EUT .9

Table 1 – Test severity classes.7
Table 2 – Criteria for acceptance .11

60255-22-2 © IEC:2008 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
___________
MEASURING RELAYS AND PROTECTION EQUIPMENT –

Part 22-2: Electrical disturbance tests –
Electrostatic discharge tests
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
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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 60255-22-2 has been prepared by IEC technical committee 95:
Measuring relays and protection equipment.
This third edition cancels and replaces the second edition published in 1996. It constitutes a
technical revision.
The main changes with respect to the previous edition are listed below:
• the improvement of the scope and object,
• the improvement of the test severity level, test set-up and test report.

– 4 – 60255-22-2 © IEC:2008
The text of this part is based on the following documents:
FDIS Report on voting
95/227/FDIS 95/232/RVD
Full information on the voting for the approval of this standard can be found in the voting on
report 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.
60255-22-2 © IEC:2008 – 5 –
MEASURING RELAYS AND PROTECTION EQUIPMENT –

Part 22-2: Electrical disturbance tests –
Electrostatic discharge tests
1 Scope and object
This part of IEC 60255-22 is based on IEC 61000-4-2, referring to that publication where
applicable, and specifies the general requirements for electrostatic discharge tests for
measuring relays and protection equipment for power system protection, including the control,
monitoring and process interface equipment used with those systems.
The object of the tests is to confirm that the equipment being tested will not maloperate when
energized and subjected to an electrostatic discharge.
The requirements are applicable only to relays and protection equipment in new condition,
and all tests specified are type tests only.
The object of this standard is to state:
• definitions of terms used;
• test severity level;
• test equipment;
• test set-up;
• test procedures;
• criteria for acceptance;
• test report requirements.
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 60050-161, International Electrotechnical Vocabulary – Chapter 161: Electromagnetic
compatibility
IEC 60050-446, International Electrotechnical Vocabulary – Chapter 446: Electrical relays
IEC 60050-448, International Electrotechnical Vocabulary – Chapter 448: Power system
protection
IEC 60255-6:1988, Electrical relays – Part 6: Measuring relays and protection equipment
IEC 61000-4-2:1995, Electromagnetic compatibility (EMC) – Part 4-2: Testing and
measurement techniques – Electrostatic discharge immunity test
Amendment 1 (1998)
Amendment 2 (2000)
– 6 – 60255-22-2 © IEC:2008
3 Terms and definitions
For the purposes of this document, the terms and definitions in IEC 60050-161, IEC 60050-
446 and IEC 60050-448 apply and, for special terms, IEC 61000-4-2 applies.
3.1
equipment under test
EUT
equipment which may be either a measuring relay or a protection equipment
3.2
contact discharge method
method of testing, in which the electrode of the test generator is held in contact with the EUT,
and the discharge to the EUT actuated by the discharge switch within the generator
3.3
air discharge method
method of testing, in which the charged electrode of the test generator is approached to the
EUT, and the discharge actuated by a spark to the EUT
3.4
direct application
application of the test directly to the EUT
3.5
indirect application
application of the test to a coupling plane in the vicinity of the EUT, and simulation of personal
discharge
...