IEC 62793:2016
(Main)Protection against lightning - Thunderstorm warning systems
Protection against lightning - Thunderstorm warning systems
IEC 62793:2016 describes the characteristics of thunderstorm warning systems and evaluation of the usefulness of lightning real time data and/or storm electrification data in order to implement lightning hazard preventive measures. This standard provides the basic requirements for sensors and networks collecting accurate data of the relevant parameters, giving real-time information of lightning tracks and range. It describes the application of the data collected by these sensors and networks in the form of warnings and historical data. This standard applies to the use of information from thunderstorm warning systems (systems or equipment providing real-time information) on atmospheric electric activity in order to monitor preventive measures.
This bilingual version (2018-11) corresponds to the monolingual English version, published in 2016-05.
The French version of this standard has not been voted upon.
Protection contre la foudre - Systèmes d'alerte aux orages
L'IEC 62793:2016 décrit les caractéristiques des systèmes d'alerte aux orages, ainsi que l'évaluation du degré d'utilité des données en temps réel relatives aux éclairs et/ou à l'électrisation des orages, afin de mettre en œuvre des mesures préventives contre les dangers de la foudre.
La présente norme indique les exigences fondamentales applicables aux capteurs et aux réseaux de collecte de données précises pour les paramètres pertinents, qui fournissent des informations en temps réel sur la trajectoire et l'amplitude d'un éclair. Elle décrit les applications des données collectées par ces capteurs et ces réseaux sous la forme d'alertes et de données historiques.
La présente norme s'applique à l'usage des informations recueillies par les systèmes d'alerte aux orages (systèmes ou équipements fournissant des informations en temps réel) sur l'activité électrique atmosphérique, à des fins de surveillance des mesures préventives.
La présente version bilingue (2018-11) correspond à la version anglaise monolingue publiée en 2016-05.
La version française de cette norme n'a pas été soumise au vote.
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IEC 62793 ®
Edition 1.0 2016-05
INTERNATIONAL
STANDARD
colour
inside
Protection against lightning – Thunderstorm warning systems
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
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About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.
About IEC publications
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IEC 62793 ®
Edition 1.0 2016-05
INTERNATIONAL
STANDARD
colour
inside
Protection against lightning – Thunderstorm warning systems
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 29.020; 91.120.40 ISBN 978-2-8322-3352-8
– 2 – IEC 62793:2016 © IEC 2016
CONTENTS
FOREWORD . 5
INTRODUCTION . 7
1 Scope . 8
2 Normative references. 9
3 Terms, definitions and abbreviations . 9
3.1 Terms and definitions . 9
3.2 Abbreviations . 12
4 Thunderstorm phases and detectable phenomena for alarming . 13
4.1 Introductory remark . 13
4.2 Phase 1 – Initial phase (cumulus stage) . 13
4.3 Phase 2 – Growth phase . 13
4.4 Phase 3 – Mature phase . 13
4.5 Phase 4 – Dissipation phase . 13
5 Classification of thunderstorm detection devices and their properties . 14
6 Alarm method . 15
6.1 General . 15
6.2 Areas . 16
6.2.1 Target area (TA) . 16
6.2.2 Surrounding area (SA) . 16
6.2.3 Monitoring area (MA) . 17
6.2.4 Coverage area (CA) . 17
6.3 Alarm triggering . 17
6.4 Alarm information delivery . 19
7 Installation and maintenance . 19
8 Alarm evaluation . 19
8.1 General . 19
8.2 Evaluation of TWS by using lightning location data . 21
8.3 Fine tuning of TWS by processing archived data . 21
9 Thunderstorms warning systems application guide . 21
9.1 General . 21
9.2 Procedure . 22
9.2.1 General . 22
9.2.2 Step 1 – Identification of hazardous situations . 22
9.2.3 Step 2 – Determination of type of loss . 22
9.2.4 Step 3 – Risk control . 23
Annex A (informative) Overview of the lightning phenomena . 25
A.1 Origin of thunderclouds and electrification . 25
A.2 Lightning phenomena . 25
A.3 Electric thunderstorm and lightning characteristics useful for prevention . 26
A.3.1 Electrostatic field . 26
A.3.2 Electromagnetic fields . 27
A.3.3 Other parameters useful in lightning detection . 27
Annex B (informative) Thunderstorm detection techniques . 28
B.1 Introductory remarks . 28
B.2 Detection techniques and parameters to qualify a sensor . 28
B.2.1 General . 28
B.2.2 Class A . 28
B.2.3 Class B . 29
B.2.4 Class C . 29
B.2.5 Class D . 29
B.3 Location techniques . 29
B.3.1 General . 29
B.3.2 Multi-sensor location techniques . 29
B.3.3 Single sensor techniques . 30
B.4 Thunderstorm detectors evaluation . 31
B.5 Choosing a thunderstorm detection system . 31
Annex C (informative) Examples of application of thunderstorm warning systems . 32
C.1 Example n° 1 – Telecommunication tower . 32
C.1.1 Step 1: Identification of hazardous situations . 32
C.1.2 Step 2: Determination of type of loss . 32
C.1.3 Step 3: Risk control . 33
C.2 Example n° 2 – Golf course . 33
C.2.1 Step 1: Identification of hazardous situations . 33
C.2.2 Step 2: Determination of type of loss . 34
C.2.3 Step 3: Risk control . 35
Annex D (informative) Catalogue of possible recommended preventive actions to be
taken . 36
Annex E (informative) Example of TWS evaluation on a wind turbine site . 38
Annex F (informative) How to test thunderstorm detectors . 40
F.1 General . 40
F.2 Laboratory tests . 40
F.2.1 General . 40
F.2.2 Resistance to UV radiation tests (for non-metallic sensor housing) . 40
F.2.3 Resistance tests to corrosion (for metallic parts of sensor) . 41
F.2.4 Mechanical tests . 41
F.2.5 Index of protection confirmation (IP Code) . 42
F.2.6 Electric tests . 42
F.2.7 Marking test . 43
F.2.8 Electromagnetic compatibility (EMC) . 43
F.3 Optional tests on an open air platform under natural lightning conditions . 43
Bibliography . 47
Figure 1 – Examples of different target area shapes . 16
Figure 2 – Example of the distribution of the coverage area (CA), the monitoring area
(MA), the target area (TA), and surrounding area (SA) . 17
Figure 3 – Example of an alarm . 18
Figure A.1 – Standard lightning classifications . 26
Figure D.1 – Procedure flow chart . 37
Figure E.1 – Lightning activity around the site for a period of eight years . 38
Figure F.1 – Difference in electric field measurement during one thunderstorm event . 45
Table 1 – Lightning detector properties . 15
– 4 – IEC 62793:2016 © IEC 2016
Table 2 – Contingency table . 20
Table 3 – Identification of hazardous situations . 22
Table 4 – Loss concerning people . 23
Table 5 – Loss concerning goods . 23
Table 6 – Loss concerning services .
...
IEC 62793 ®
Edition 1.0 2016-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Protection against lightning – Thunderstorm warning systems
Protection contre la foudre – Systèmes d'alerte aux orages
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
your local IEC member National Committee for further information.
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Switzerland
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.
About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigenda or an amendment might have been published.
IEC Catalogue - webstore.iec.ch/catalogue Electropedia - www.electropedia.org
The stand-alone application for consulting the entire The world's leading online dictionary of electronic and
bibliographical information on IEC International Standards, electrical terms containing 21 000 terms and definitions in
Technical Specifications, Technical Reports and other English and French, with equivalent terms in 16 additional
documents. Available for PC, Mac OS, Android Tablets and languages. Also known as the International Electrotechnical
iPad. Vocabulary (IEV) online.
IEC publications search - webstore.iec.ch/advsearchform IEC Glossary - std.iec.ch/glossary
The advanced search enables to find IEC publications by a 67 000 electrotechnical terminology entries in English and
variety of criteria (reference number, text, technical French extracted from the Terms and Definitions clause of
committee,…). It also gives information on projects, replaced IEC publications issued since 2002. Some entries have been
and withdrawn publications. collected from earlier publications of IEC TC 37, 77, 86 and
CISPR.
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IEC 62793 ®
Edition 1.0 2016-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Protection against lightning – Thunderstorm warning systems
Protection contre la foudre – Systèmes d'alerte aux orages
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.020; 91.120.40 ISBN 978-2-8322-6231-3
– 2 – IEC 62793:2016 © IEC 2016
CONTENTS
FOREWORD . 5
INTRODUCTION . 7
1 Scope . 8
2 Normative references . 9
3 Terms, definitions and abbreviations . 9
3.1 Terms and definitions . 9
3.2 Abbreviations . 12
4 Thunderstorm phases and detectable phenomena for alarming. 13
4.1 Introductory remark . 13
4.2 Phase 1 – Initial phase (cumulus stage) . 13
4.3 Phase 2 – Growth phase . 13
4.4 Phase 3 – Mature phase . 13
4.5 Phase 4 – Dissipation phase . 13
5 Classification of thunderstorm detection devices and their properties . 14
6 Alarm method . 15
6.1 General . 15
6.2 Areas . 16
6.2.1 Target area (TA) . 16
6.2.2 Surrounding area (SA) . 16
6.2.3 Monitoring area (MA) . 17
6.2.4 Coverage area (CA) . 17
6.3 Alarm triggering . 17
6.4 Alarm information delivery. 19
7 Installation and maintenance . 19
8 Alarm evaluation . 19
8.1 General . 19
8.2 Evaluation of TWS by using lightning location data . 21
8.3 Fine tuning of TWS by processing archived data . 21
9 Thunderstorms warning systems application guide . 21
9.1 General . 21
9.2 Procedure . 22
9.2.1 General . 22
9.2.2 Step 1 – Identification of hazardous situations . 22
9.2.3 Step 2 – Determination of type of loss . 22
9.2.4 Step 3 – Risk control . 23
Annex A (informative) Overview of the lightning phenomena . 25
A.1 Origin of thunderclouds and electrification . 25
A.2 Lightning phenomena . 25
A.3 Electric thunderstorm and lightning characteristics useful for prevention . 26
A.3.1 Electrostatic field . 26
A.3.2 Electromagnetic fields . 27
A.3.3 Other parameters useful in lightning detection . 27
Annex B (informative) Thunderstorm detection techniques . 28
B.1 Introductory remarks . 28
B.2 Detection techniques and parameters to qualify a sensor . 28
B.2.1 General . 28
B.2.2 Class A . 28
B.2.3 Class B . 29
B.2.4 Class C. 29
B.2.5 Class D. 29
B.3 Location techniques . 29
B.3.1 General . 29
B.3.2 Multi-sensor location techniques . 29
B.3.3 Single sensor techniques . 30
B.4 Thunderstorm detectors evaluation . 31
B.5 Choosing a thunderstorm detection system . 31
Annex C (informative) Examples of application of thunderstorm warning systems . 32
C.1 Example n° 1 – Telecommunication tower . 32
C.1.1 Step 1: Identification of hazardous situations . 32
C.1.2 Step 2: Determination of type of loss . 32
C.1.3 Step 3: Risk control . 33
C.2 Example n° 2 – Golf course. 33
C.2.1 Step 1: Identification of hazardous situations . 33
C.2.2 Step 2: Determination of type of loss . 34
C.2.3 Step 3: Risk control . 35
Annex D (informative) Catalogue of possible recommended preventive actions to be
taken . 36
Annex E (informative) Example of TWS evaluation on a wind turbine site . 38
Annex F (informative) How to test thunderstorm detectors . 40
F.1 General .
...
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