BS EN IEC 62793:2018
$198.66
Protection against lightning. Thunderstorm warning systems
| Published By | Publication Date | Number of Pages |
| BSI | 2018 | 54 |
This International Standard 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 standard includes:
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a general description of available lightning and storm electrification hazard warning systems;
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a classification of thunderstorm detection devices and properties;
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guidelines for alarming methods;
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a procedure to determine the usefulness of thunderstorm information;
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some informative examples of possible preventive actions.
The following aspects are outside the scope of this standard:
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lightning protection systems; such systems are covered by the IEC 62305 series;
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other thunderstorm related phenomena such as rain, hail, wind;
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satellite and radar thunderstorm detection techniques.
A non-exhaustive list of situations to which this standard could be applicable is given below:
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people in open areas involved in activities such as maintenance, labour, sports, competitions, agriculture and fisheries or situations where large crowds gather;
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wind farms, large solar power systems, power lines;
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occupational health and safety prevention;
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sensitive equipment such as computer systems, emergency systems, alarms and safety equipment;
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operational and industrial processes;
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storage, processing and transportation of hazardous substances (e.g. flammable, radioactive, toxic and explosive substances);
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determined environments or activities with special danger of electrostatic discharges (e.g. space and flight vehicle operations);
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operations in which the continuity of the basic services is very important (e.g. telecommunications, the generation, transport and distribution of energy, sanitary services and emergency services);
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infrastructures: ports, airports, railroads, motorways and cableways;
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civil defense of the environment: forest fires, land slide and floods;
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wide networks (e.g. power lines, telecommunication lines) may also benefit from having early detection of thunderstorms.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 2 | undefined |
| 7 | CONTENTS |
| 10 | FOREWORD |
| 12 | INTRODUCTION |
| 13 | 1 Scope |
| 14 | 2 Normative references 3 Terms, definitions and abbreviations 3.1 Terms and definitions |
| 17 | 3.2 Abbreviations |
| 18 | 4 Thunderstorm phases and detectable phenomena for alarming 4.1 Introductory remark 4.2 Phase 1 – Initial phase (cumulus stage) 4.3 Phase 2 – Growth phase 4.4 Phase 3 – Mature phase 4.5 Phase 4 – Dissipation phase |
| 19 | 5 Classification of thunderstorm detection devices and their properties |
| 20 | 6 Alarm method 6.1 General Tables Table 1 – Lightning detector properties |
| 21 | 6.2 Areas 6.2.1 Target area (TA) 6.2.2 Surrounding area (SA) Figures Figure 1 – Examples of different target area shapes |
| 22 | 6.2.3 Monitoring area (MA) 6.2.4 Coverage area (CA) 6.3 Alarm triggering Figure 2 – Example of the distribution of the coverage area (CA), the monitoring area (MA), the target area (TA), and surrounding area (SA) |
| 23 | Figure 3 – Example of an alarm |
| 24 | 6.4 Alarm information delivery 7 Installation and maintenance 8 Alarm evaluation 8.1 General |
| 25 | Table 2 – Contingency table |
| 26 | 8.2 Evaluation of TWS by using lightning location data 8.3 Fine tuning of TWS by processing archived data 9 Thunderstorms warning systems application guide 9.1 General |
| 27 | 9.2 Procedure 9.2.1 General 9.2.2 Step 1 – Identification of hazardous situations 9.2.3 Step 2 – Determination of type of loss Table 3 – Identification of hazardous situations |
| 28 | 9.2.4 Step 3 – Risk control Table 4 – Loss concerning people Table 5 – Loss concerning goods Table 6 – Loss concerning services Table 7 – Loss concerning environment |
| 29 | Table 8 – Risk control |
| 30 | Annexes Annex A (informative) Overview of the lightning phenomena A.1 Origin of thunderclouds and electrification A.2 Lightning phenomena |
| 31 | A.3 Electric thunderstorm and lightning characteristics useful for prevention A.3.1 Electrostatic field Figure A.1 – Standard lightning classifications |
| 32 | A.3.2 Electromagnetic fields A.3.3 Other parameters useful in lightning detection |
| 33 | Annex B (informative) Thunderstorm detection techniques B.1 Introductory remarks B.2 Detection techniques and parameters to qualify a sensor B.2.1 General B.2.2 Class A |
| 34 | B.2.3 Class B B.2.4 Class C B.2.5 Class D B.3 Location techniques B.3.1 General B.3.2 Multi-sensor location techniques |
| 35 | B.3.3 Single sensor techniques |
| 36 | B.4 Thunderstorm detectors evaluation B.5 Choosing a thunderstorm detection system |
| 37 | Annex C (informative) Examples of application of thunderstorm warning systems C.1 Example n 1 – Telecommunication tower C.1.1 Step 1: Identification of hazardous situations C.1.2 Step 2: Determination of type of loss Table C.1 – Identification of hazardous situations Table C.2 – Loss concerning goods |
| 38 | C.1.3 Step 3: Risk control C.2 Example n 2 – Golf course C.2.1 Step 1: Identification of hazardous situations Table C.3 – Loss concerning services Table C.4 – Loss concerning environment Table C.5 – Risk control |
| 39 | C.2.2 Step 2: Determination of type of loss Table C.6 – Identification of hazardous situations Table C.7 – Loss concerning people Table C.8 – Loss concerning goods Table C.9 – Loss concerning services |
| 40 | C.2.3 Step 3: Risk control Table C.10 – Loss concerning environment Table C.11 – Risk control |
| 41 | Annex D (informative) Catalogue of possible recommended preventive actions to be taken |
| 42 | Figure D.1 – Procedure flow chart |
| 43 | Annex E (informative) Example of TWS evaluation on a wind turbine site Figure E.1 – Lightning activity around the site for a period of eight years |
| 44 | Table E.1 – Results of TWS evaluation based on archived lightning data foran 8-year period (2000 to 2007), when some of the key parameters (size of MA, trigger parameters and dwell time) were varied |
| 45 | Annex F (informative) How to test thunderstorm detectors F.1 General F.2 Laboratory tests F.2.1 General F.2.2 Resistance to UV radiation tests (for non-metallic sensor housing) |
| 46 | F.2.3 Resistance tests to corrosion (for metallic parts of sensor) F.2.4 Mechanical tests |
| 47 | F.2.5 Index of protection confirmation (IP Code) F.2.6 Electric tests |
| 48 | F.2.7 Marking test F.2.8 Electromagnetic compatibility (EMC) F.3 Optional tests on an open air platform under natural lightning conditions |
| 50 | Figure F.1 – Difference in electric field measurement during one thunderstorm event |
| 52 | Bibliography |
