SIST EN 62305-4:2006
(Main)Protection against lightning -- Part 4: Electrical and electronic systems within structures
Protection against lightning -- Part 4: Electrical and electronic systems within structures
This part of IEC 62305 provides information for the design, installation, inspection, maintenance and testing of a LEMP protection measures system (LPMS) for electrical and electronic systems within a structure, able to reduce the risk of permanent failures due to lightning electromagnetic impulse. This standard does not cover protection against electromagnetic interference due to lightning, which may cause malfunctioning of electronic systems. However, the information reported in Annex A can also be used to evaluate such disturbances. Protection measures against electromagnetic interference are covered in IEC 60364-4-44 and in the IEC 61000 series [1]2. This standard provides guidelines for cooperation between the designer of the electrical and electronic system, and the designer of the protection measures, in an attempt to achieve optimum protection effectiveness. This standard does not deal with detailed design of the electrical and electronic systems themselves.
Blitzschutz -- Teil 4: Elektrische und elektronische Systeme in baulichen Anlagen
Protection contre la foudre -- Partie 4: Réseaux de puissance et de communication dans les structures
Fournit des informations relatives à la conception, à l'installation, à l'inspection, à la maintenance et aux essais d'une installation de protection contre l'impulsion électromagnétique de foudre (IEMF). Ces installations seront adoptées dans une structure pour réduire le risque permanent de défaillances des réseaux de puissance et de communication dû aux impulsions électromagnétiques de foudre. Cette norme ne traite pas de la protection contre les perturbations électromagnétiques dues à la foudre et susceptibles d'entraîner des dysfonctionnements des réseaux de communication. Toutefois, les informations de l'Annexe A peuvent être utilisées pour évaluer ces perturbations. Les mesures de protection contre les interférences électromagnétiques sont traitées dans la CEI 60364-4-44 et dans la série CEI 61000 [1] . La présente norme donne des lignes directrices pour la coopération entre le concepteur des réseaux de puissance et de communication et le concepteur des mesures de protection pour essayer d'obtenir la protection la plus efficace. Cette norme ne traite pas de la conception détaillée des réseaux de puissance et de communication eux-mêmes.
Zaščita pred delovanjem strele - 4. del: Električni in elektronski sistemi v zgradbah (IEC 62305-4:2006)
Ta del standarda IEC 62305 se uporablja za načrtovanje, izvedbo, nadzor, vzdrževanje in preskušanje zaščitnih ukrepov pred LEMP za električne in elektronske sisteme v zgradbah, s pomočjo katerih je mogoče zmanjšati riziko trajnih okvar zaradi vpliva elektromagnetnega udara strele. Ta del standarda IEC 62305 se ne uporablja za zaščito pred elektromagnetnimi vplivi, ki bi lahko povzročili napačno delovanje elektronskih sistemov. Kljub temu pa se lahko vsebina, prikazana v dodatku A, uporabi za ovrednotenje teh motenj. Zaščitni ukrepi pred elektromagnetnimi vplivi so obravnavani v standardu IEC 60364-4-44 in v skupini standardov IEC 61000. Ta del standarda IEC 62305 daje smernice za sodelovanje med načrtovalcem električnih in elektronskih sistemov in načrtovalcem sistema zaščite pred učinki elektromagnetnega udara strele, da bi bila zaščita optimalno učinkovita. Ta standard ne obravnava podrobnosti samih električnih in elektronskih sistemov.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 62305-4:2006
01-junij-2006
1DGRPHãþD
SIST IEC 61312-1:1998
SIST IEC TR 61312-4:2000
SIST IEC TS 61312-2:2000
SIST-TS IEC/TS 61312-3:2004
=DãþLWDSUHGGHORYDQMHPVWUHOHGHO (OHNWULþQLLQHOHNWURQVNLVLVWHPLY]JUDGEDK
,(&
Protection against lightning -- Part 4: Electrical and electronic systems within structures
Blitzschutz -- Teil 4: Elektrische und elektronische Systeme in baulichen Anlagen
Protection contre la foudre -- Partie 4: Réseaux de puissance et de communication dans
les structures
Ta slovenski standard je istoveten z: EN 62305-4:2006
ICS:
91.120.40 =DãþLWDSUHGVWUHOR Lightning protection
SIST EN 62305-4:2006 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
---------------------- Page: 1 ----------------------
EUROPEAN STANDARD
EN 62305-4
NORME EUROPÉENNE
February 2006
EUROPÄISCHE NORM
ICS 29.020; 91.120.40
English version
Protection against lightning
Part 4: Electrical and electronic systems within structures
(IEC 62305-4:2006)
Protection contre la foudre Blitzschutz
Partie 4: Réseaux de puissance et de Teil 4: Elektrische und elektronische
communication dans les structures Systeme in baulichen Anlagen
(CEI 62305-4:2006) (IEC 62305-4:2006)
This European Standard was approved by CENELEC on 2006-02-01. CENELEC members are bound to comply
with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard
the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on
application to the Central Secretariat or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CENELEC member into its own language and notified
to the Central Secretariat has the same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Cyprus, the Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Rumania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.
CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
Central Secretariat: rue de Stassart 35, B - 1050 Brussels
© 2006 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 62305-4:2006 E
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EN 62305-4:2006 - 2 -
Foreword
The text of document 81/265/FDIS, future edition 1 of IEC 62305-4, prepared by IEC TC 81, Lightning
protection, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as
EN 62305-4 on 2006-02-01.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2006-11-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2009-02-01
This European Standard makes reference to International Standards. Where the International Standard
referred to has been endorsed as a European Standard or a home-grown European Standard exists, this
European Standard shall be applied instead. Pertinent information can be found on the CENELEC web
site.
__________
Endorsement notice
The text of the International Standard IEC 62305-4:2006 was approved by CENELEC as a European
Standard without any modification.
__________
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IEC 62305-4
Edition 1.0 2006-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Protection against lightning –
Part 4: Electrical and electronic systems within structures
Protection contre la foudre –
Partie 4: Réseaux de puissance et de communication dans les structures
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
XD
CODE PRIX
ICS 29.020; 91.120.40 ISBN 2-8318-8367-9
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62305-4 IEC:2006 – 3 –
CONTENTS
FOREWORD.5
INTRODUCTION.7
1 Scope.9
2 Normative references .9
3 Terms and definitions .10
4 Design and installation of a LEMP protection measures system (LPMS) .23
4.1 Design of an LPMS.16
4.2 Lightning protection zones (LPZ) .16
4.3 Basic protection measures in an LPMS .20
5 Earthing and bonding .20
5.1 Earth termination system.21
5.2 Bonding network.23
5.3 Bonding bars .28
5.4 Bonding at the boundary of an LPZ .28
5.5 Material and dimensions of bonding components.28
6 Magnetic shielding and line routing.29
6.1 Spatial shielding.29
6.2 Shielding of internal lines .29
6.3 Routing of internal lines.29
6.4 Shielding of external lines .30
6.5 Material and dimensions of magnetic shields.30
7 Coordinated SPD protection .30
8 Management of an LPMS .31
8.1 LPMS management plan .31
8.2 Inspection of an LPMS .33
8.3 Maintenance.34
Annex A (informative) Basics for evaluation of electromagnetic environment in a LPZ .35
Annex B (informative) Implementation of LEMP protection measures for electronic
systems in existing structures .61
Annex C (informative) SPD coordination .78
Annex D (informative) Selection and installation of a coordinated SPD protection.96
Bibliography.101
Figure 1 – General principle for the division into different LPZ .13
Figure 2 – Protection against LEMP – Examples of possible LEMP protection
measures systems (LPMS) .15
Figure 3 – Examples for interconnected LPZ.18
Figure 4 – Examples for extended lightning protection zones .19
Figure 5 – Example of a three-dimensional earthing system consisting of the bonding
network interconnected with the earth termination system.21
Figure 6 – Meshed earth termination system of a plant .22
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62305-4 © IEC:2006 – 3 –
62305-4 IEC:2006 – 5 –
Figure 7 – Utilization of reinforcing rods of a structure for equipotential bonding.24
Figure 8 – Equipotential bonding in a structure with steel reinforcement .25
Figure 9 – Integration of electronic systems into the bonding network.26
Figure 10 – Combinations of integration methods of electronic systems into the
bonding network .27
Figure A.1 – LEMP situation due to lightning flash .37
Figure A.2 – Simulation of the rise of magnetic field by damped oscillations .39
Figure A.3 – Large volume shield built by metal reinforcement and metal frames.40
Figure A.4 – Volume for electrical and electronic systems inside an inner LPZ n.41
Figure A.5 – Reducing induction effects by line routing and shielding measures .43
Figure A.6 – Example of an LPMS for an office building.44
Figure A.7 – Evaluation of the magnetic field values in case of a direct lightning flash .46
Figure A.8 – Evaluation of the magnetic field values in case of a nearby lightning flash .48
Figure A.9 – Distance s depending on rolling sphere radius and structure dimensions .51
a
Figure A.10 – Types of grid-like large volume shields .53
Figure A.11 – Magnetic field strength H inside a grid-like shield Type 1.54
1/max
Figure A.12 – Magnetic field strength H inside a grid-like shield Type 1.54
1/max
Figure A.13 – Low-level test to evaluate the magnetic field inside a shielded structure .56
Figure A.14 – Voltages and currents induced into a loop built by lines .57
Figure B.1 – Upgrading of LEMP protection measures and electromagnetic
compatibility in existing structures .63
Figure B.2 – Possibilities to establish LPZs in existing structures.69
Figure B.3 – Reduction of loop area using shielded cables close to a metal plate .71
Figure B.4 – Example of a metal plate for additional shielding .72
Figure B.5 – Protection of aerials and other external equipment .74
Figure B.6 – Inherent shielding provided by bonded ladders and pipes .75
Figure B.7 – Ideal positions for lines on a mast (cross-section of steel lattice mast).76
Figure C.1 – Example for the application of SPD in power distribution systems.79
Figure C.2 – Basic model for energy coordination of SPD .81
Figure C.3 – Combination of two voltage-limiting type SPDs .82
Figure C.4 – Example with two voltage-limiting type MOV 1 and MOV 2.84
Figure C.5 – Combination of voltage-switching type spark gap and voltage-limiting type
MOV .85
Figure C.6 – Example with voltage-switching type spark gap and voltage-limiting type MOV.86
Figure C.7 – Determination of decoupling inductance for 10/350 µs and 0,1kA/µs surges .87
Figure C.8 – Example with spark gap and MOV for a 10/350 µs surge .89
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62305-4 IEC:2006 – 7 –
Figure C.9 – Example with spark gap and MOV for 0,1kA/µs surge.91
Figure C.10 – Coordination variant I – Voltage-limiting type SPD .92
Figure C.11 – Coordination variant II – Voltage-limiting type SPD .93
Figure C.12 – Coordination variant III – Voltage-switching type SPD and voltage-
limiting type SPD .93
Figure C.13 – Coordination variant IV – Several SPDs in one element.94
Figure C.14 – Coordination according to the “let through energy” method .94
Figure D.1 – Surge voltage between live conductor and bonding bar .97
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INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
PROTECTION AGAINST LIGHTNING –
Part 4: Electrical and electronic systems within structures
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
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
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 62305-4 has been prepared by IEC technical committee 81:
Lightning protection.
The IEC 62305 series (Parts 1 to 5), is produced in accordance with the New Publications
Plan, approved by National Committees (81/171/RQ (2001-06-29)), which restructures in a
more simple and rational form and updates the publications of the IEC 61024 series,
IEC 61312 series and the IEC 61663 series.
The text of this first edition of IEC 62305-4 is compiled from and replaces
– IEC 61312-1, first edition (1995);
– IEC 61312-2, first edition (1998);
– IEC 61312-3, first edition (2000);
– IEC 61312-4, first edition (1998).
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62305-4 IEC:2006 – 11 –
The text of this standard is based on the following documents:
FDIS Report on voting
81/265/FDIS 81/270/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, as close as possible, in accordance with the ISO/IEC
Directives, Part 2.
IEC 62305 consists of the following parts, under the general title Protection against lightning:
Part 1: General principles
Part 2: Risk management
Part 3: Physical damage to structures and life hazard
Part 4: Electrical and electronic systems within structures
1
Part 5: Services
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.
———————
1
To be published.
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62305-4 © IEC:2006 – 7 –
62305-4 IEC:2006 – 13 –
INTRODUCTION
Lightning as a source of harm is a very high-energy phenomenon. Lightning flashes release
many hundreds of mega-joules of energy. When compared with the milli-joules of energy that
may be sufficient to cause damage to sensitive electronic equipment in electrical and
electronic systems within a structure, it is clear that additional protection measures will be
necessary to protect some of this equipment.
The need for this International Standard has arisen due to the increasing cost of failures of
electrical and electronic systems, caused by electromagnetic effects of lightning. Of particular
importance are electronic systems used in data processing and storage as well as process
control and safety for plants of considerable capital cost, size and complexity (for which plant
outages are very undesirable for cost and safety reasons).
Lightning can cause different types of damage in a structure, as defined in IEC 62305-2:
D1 injuries to living beings due to touch and step voltages;
D2 physical damage due to mechanical, thermal, chemical and explosive effects;
D3 failures of electrical and electronic systems due to electromagnetic effects.
IEC 62305-3 deals with the protection measures to reduce the risk of physical damage and
life hazard, but does not cover the protection of electrical and electronic systems.
This Part 4 of IEC 62305 therefore provides information on protection measures to reduce the
risk of permanent failures of electrical and electronic systems within structures.
Permanent failure of electrical and electronic systems can be caused by the lightning
electromagnetic impulse (LEMP) via:
a) conducted and induced surges transmitted to apparatus via connecting wiring;
b) the effects of radiated electromagnetic fields directly into apparatus itself.
Surges to the structure can be generated externally or internally:
– surges external to the structure are created by lightning flashes striking incoming lines or
the nearby ground, and are transmitted to electrical and electronic systems via these lines;
– surges internal to the structure are created by lightning flashes striking the structure or the
nearby ground.
The coupling can arise from different mechanisms:
– resistive coupling (e.g. the earth impedance of the earth termination system or the cable
shield resistance);
– magnetic field coupling (e.g. caused by wiring loops in the electrical and electronic system
or by inductance of bonding conductors);
– electric field coupling (e.g. caused by rod antenna reception).
NOTE The effects of electric field coupling are generally very small when compared to the magnetic field coupling
and can be disregarded.
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62305-4 IEC:2006 – 15 –
Radiated electromagnetic fields can be generated via
– the direct lightning current flowing in the lightning channel,
– the partial lightning current flowing in conductors (e.g. in the down conductors of an
external LPS according to IEC 62305-3 or in an external spatial shield according to this
standard).
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62305-4 © IEC:2006 – 9 –
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PROTECTION AGAINST LIGHTNING –
Part 4: Electrical and electronic systems within structures
1 Scope
This part of IEC 62305 provides information for the design, installation, inspection,
maintenance and testing of a LEMP protection measures system (LPMS) for electrical and
electronic systems within a structure, able to reduce the risk of permanent failures due to
lightning electromagnetic impulse.
This standard does not cover protection against electromagnetic interference due to lightning,
which may cause malfunctioning of electronic systems. However, the information reported in
Annex A can also be used to evaluate such disturbances. Protection measures against
2
electromagnetic interference are covered in IEC 60364-4-44 and in the IEC 61000 series [1] .
This standard provides guidelines for cooperation between the designer of the electrical and
electronic system, and the designer of the protection measures, in an attempt to achieve
optimum protection effectiveness.
This standard does not deal with detailed design of the electrical and electronic systems
themselves.
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 60364-4-44:2001, Electrical installations of buildings – Part 4-44: Protection for safety –
Protection against voltage disturbances and electromagnetic disturbances
IEC 60364-5-53:2001, Electrical installations of building – Part 5-53: Selection and erection of
electrical equipment– Isolation, switching and control
IEC 60664-1:2002, Insulation coordination for equipment within low-voltage systems – Part 1:
Principles, requirements and tests
IEC 61000-4-5:1995, Electromagnetic compatibility (EMC) – Part 4-5: Testing and measure-
ment techniques – Surge immunity test
IEC 61000-4-9:1993, Electromagnetic compatibility (EMC) – Part 4-9: Testing and measure-
ment techniques – Pulse magnetic field immunity test
IEC 61000-4-10:1993, Electromagnetic compatibility (EMC) – Part 4-10: Testing and measure-
ment techniques – Damped oscillatory magnetic field immunity test
———————
2
Figures in square brackets refer to the biblography.
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62305-4 IEC:2006 – 19 –
IEC 61000-5-2:1997, Electromagnetic compatibility (EMC) – Part 5: Installation and mitigation
guidelines – Section 2: Earthing and cabling
IEC 61643-1:1998, Surge protective devices connected to low-voltage power distribution
systems – Part 1: Performance requirements and testing methods
IEC 61643-12:2002, Low-voltage surge protective devices – Part 12: Surge protective devices
connected to low-voltage power distribution systems – Selection and application principles
IEC 61643-21:2000, Low voltage surge protective devices – Part 21: Surge protective devices
connected to telecommunications and signalling networks – Performance requirements and
testing methods
IEC 61643-22:2004, Low voltage surge protective devices – Part 22: Surge protective devices
connected to telecommunications and signalling networks – Part 22: Selection and application
principles
IEC 62305-1, Protection against lightning. Part 1: General principles
IEC 62305-2, Protection against lightning. Part 2: Risk management
IEC 62305-3, Protection against lightning. Part 3: Physical damage to structures and life
hazard
ITU-T Recommendation K.20:2003, Resistibility of telecommunication equipment installed in a
telecommunications centre to overvoltages and overcurrents
ITU-T Recommendation K.21:2003, Resistibility of telecommunication equipment installed in
customer premises to overvoltages and overcurrent
3 Terms and definitions
For the purposes of this document, the following terms and definitions, as well as those given
in other parts of IEC 62305, apply.
3.1
electrical system
system incorporating low voltage power supply components
3.2
electronic system
system incorporating sensitive electronic components such as communication equipment,
computer, control and instrumentation systems, radio systems, power electronic installations
3.3
internal systems
electrical and electronic systems within a structure
3.4
lightning electromagnetic impulse
LEMP
electromagnetic effects of lightning current
NOTE It includes conducted surges as well as radiated impulse electromagnetic field effects.
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62305-4 IEC:2006 – 21 –
3.5
surge
transient wave appearing as overvoltage and/or overcurrent caused by LEMP
NOTE Surges caused by LEMP can arise from (partial) lightning currents, from induction effects in installation
loops and as a remaining threat downstream of SPD.
3.6
rated impulse withstand voltage level
U
w
impulse withstand voltage assigned by the manufacturer to the equipment or to a part of it,
characterizing the specified withstand capability of its insulation against overvoltages
NOTE For the purposes of this standard, only withstand voltage between live conductors and earth is considered.
3.7
lightning protection level
LPL
number related to a set of lightning current parameters values relevant to the probability that
the associated maximum and minimum design values will not be exceeded in naturally
occurring lightning
NOTE Lightning protection level is used to design protection measures according to the relevant set of lightning
current parameters.
3.8
lightning protection zone
LPZ
zone where the lightning electromagnetic environment is defined
NOTE The zone boundaries of an LPZ are not necessarily physical boundaries (e.g. walls, floor and ceiling).
3.9
LEMP protection measures system
LPMS
complete system of protection measures for internal systems against LEMP
3.10
grid-like spatial shield
magnetic shield characterized by openings
NOTE For a building or a room, it is preferably built by interconnected natural metal components of the structure
(e.g. rods of reinforcement in concrete, metal frames and metal supports).
3.11
earth-termination system
part of an external LPS which is intended to conduct and disperse lightning current into the
earth
3.12
bonding network
interconnecting network of all conductive parts of the structure and of internal systems (live
conductors excluded) to the earth-termination system
3.13
earthing system
complete system combining the earth-termination system and the bonding network
3.14
surge protective device
SPD
device intended to limit transient overvoltages and divert surge currents. It contains at least
one non linear component
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62305-4 IEC:2006 – 23 –
3.15
SPD tested with I
imp
SPDs which withstand the partial lightning current with a typical waveform 10/350 µs require a
corresponding impulse test current I
imp
NOTE For power lines, a suitable test current I is defined in the Class I test procedure of IEC 61643-1.
imp
3.16
SPD tested with I
n
SPDs which withstand induced surge currents with a typical waveform 8/20 µs require a
corresponding impulse test current I
n
NOTE
...
SLOVENSKI SIST EN 62305-4
STANDARD
junij 2006
Zaščita pred delovanjem strele – 4. del: Električni in elektronski sistemi v
zgradbah (IEC 62305-4:2006)
Protection against lightning – Part 4: Electrical and electronic systems within
structures (IEC 62305-4:2006)
Protection contre la foudre – Partie 4: Réseaux de puissance et de
communication dans les structures (CEI 62305-4:2006)
Blitzschutz – Teil 4: Elektrische und elektronische Systeme in baulichen Anlagen
(IEC 62305-2:2006)
Referenčna oznaka
ICS 91.120.40 SIST EN 62305-4:2006 (sl)
Nadaljevanje na straneh II in III in od 1 do 91
© 2010-05. Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov ni dovoljeno.
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SIST EN 62305-4 : 2006
NACIONALNI UVOD
Standard SIST EN 62305-4 (sl), Zaščita pred delovanjem strele – 4. del: Električni in elektronski
sistemi v zgradbah (IEC 62305-4:2006), 2006, ima status slovenskega standarda in je istoveten
evropskemu standardu EN 62305-4 (en), Protection against lightning – Part 4: Electrical and electronic
systems within structures, 2006.
NACIONALNI PREDGOVOR
Evropski standard EN 62305-4:2006 je pripravil tehnični odbor Evropske organizacije za
standardizacijo na področju elektrotehnike CLC/TC 81X Strelovodna zaščita. Evropski standard je
istoveten mednarodnemu standardu IEC 62305-4:2006, ki ga je pripravil tehnični odbor Mednarodne
elektrotehniške komisije IEC/TC 81 Strelovodna zaščita.
Slovenski standard SIST EN 62305-4:2006 je prevod evropskega standarda EN 62305-4:2006. V
primeru spora glede besedila slovenskega prevoda v tem standardu je odločilen izvirni evropski
standard v angleškem jeziku. Slovensko izdajo standarda je pripravil tehnični odbor SIST/TC STZ
Zaščita pred delovanjem strele.
Odločitev za privzem tega standarda po metodi ponatisa je dne 24. oktobra 2006 sprejel tehnični
odbor SIST/TC STZ.
OSNOVA ZA IZDAJO STANDARDA
– privzem evropskega standarda EN 62305-4:2006.
ZVEZE S STANDARDI
S privzemom tega evropskega standarda veljajo za omenjeni namen referenčnih standardov vsi
standardi, navedeni v izvirniku, razen tistih, ki so že sprejeti v nacionalno standardizacijo:
SIST IEC 60364-4-44:2006 Električne inštalacije zgradb – 4-44. del: Zaščitni ukrepi – Zaščita
pred prenapetostmi – Zaščita pred napetostnimi motnjami in pred
elektromagnetnimi motnjami
SIST IEC 60364-5-53:2006 Električne inštalacije zgradb – 5-53. del: Izbira in namestitev
električne opreme – Ločevanje, stikanje in krmiljenje
SIST EN 60664-1:2004 Uskladitev izolacije za opremo v okviru nizkonapetostnih sistemov
– 1. del: Načela, zahteve in preskusi (IEC 60664-1:1992 +
A1:2000 + A2:2002)
SIST EN 61000-4-5:1997 Elektromagnetna združljivost (EMC) – 4-5. del: Preskusne in
merilne tehnike – Preskus odpornosti proti napetostnemu udaru
(IEC 1000-4-5:1995)
SIST EN 61000-4-9:1997 Elektromagnetna združljivost (EMC) – 4-9. del: Preskusne in
merilne tehnike – Preskus odpornosti proti impulznemu
magnetnemu polju
SIST EN 61000-4-10:1997 Elektromagnetna združljivost (EMC) – 4-10. del: Preskusne in
merilne tehnike – Preskus odpornosti proti dušenim nihajnim
magnetnim poljem (IEC 1000-4-9:1993)
SIST IEC/TR 61000-5-2:1998 Elektromagnetna združljivost (EMC) – 5. del: Smernice za
inštaliranje in blažitev – 2. oddelek: Ozemljitev in pokabljenje
SIST IEC 61643-1:1999 Nizkonapetostne naprave za zaščito pred prenapetostnimi udari –
11. del: Naprave za zaščito pred prenapetostnimi udari za
nizkonapetostne napajalne sisteme – Zahteve in preskusi
II
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SIST EN 62305-4 : 2006
SIST-TS CLC/TS 61643-12:2007 Nizkonapetostne naprave za zaščito pred prenapetostnimi udari –
12. del: Naprave za zaščito pred prenapetostnimi udari za
nizkonapetostne napajalne sisteme – Izbira in načela za uporabo
(IEC 61643-12:2002, spremenjen)
SIST EN 61643-21:2002 Nizkonapetostne naprave za zaščito pred prenapetostnimi udari –
21. del: Naprave, priključene na telekomunikacijska in signalna
omrežja – Zahtevane lastnosti in preskusne metode (IEC 61643-21:
2000 + popravek mar. 2001)
SIST-TS CLC/TS 61643-22:2007 Nizkonapetostne naprave za zaščito pred prenapetostnimi udari –
22. del: Naprave, priključene na telekomunikacijska in signalna
omrežja – Izbira in načela za uporabo (IEC 61643-12:2004,
spremenjen)
SIST EN 62305-1 Zaščita pred delovanjem strele – 1. del: Splošna načela
(IEC 62305-1:2006)
SIST EN 62305-2 Zaščita pred delovanjem strele – 2. del: Vodenje rizika
(IEC 62305-2:2006)
SIST EN 62305-3 Zaščita pred delovanjem strele – 3. del: Fizična škoda na
zgradbah in nevarnost za živa bitja (IEC 62305-3:2006)
OPOMBE
– Nacionalni uvod in nacionalni predgovor nista sestavni del standarda.
– Povsod, kjer se v besedilu standarda uporablja izraz “evropski standard”, v SIST EN 62305-
4:2006 to pomeni “slovenski standard”.
– Ta nacionalni dokument je istoveten z EN 62305-4:2006 in je objavljen z dovoljenjem
CENELEC
Avenue Marnix 17
B-1050 Bruselj
Belgija
This national document is identical with EN 62305-4:2006 and is published with the permission of
CENELEC
Avenue Marnix 17
B-1050 Bruxelles
Belgium
III
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SIST EN 62305-4 : 2006
(Prazna stran)
IV
---------------------- Page: 4 ----------------------
EVROPSKI STANDARD EN 62305-4
EUROPEAN STANDARD
NORME EUROPÉENNE
EUROPÄISCHE NORM februar 2006
ICS 29.020; 91.120.40
Slovenska izdaja
Zaščita pred delovanjem strele – 4. del: Električni in elektronski sistemi v
zgradbah (IEC 62305-4:2006)
Part 4: Electrical and electronic Partie 4: Réseaux de puissance et Teil 4: Elektrische und
systems within structures de communication dans les elektronische Systeme in
(IEC 62305-4:2006) structures (CEI 62305-4:2006) baulichen Anlagen (IEC 62305-
4:2006)
Ta evropski standard je CENELEC sprejel 1. februarja 2006. Člani CENELEC morajo izpolnjevati
notranje predpise CEN/CENELEC, s katerimi je predpisano, da mora biti ta standard brez kakršnihkoli
sprememb sprejet kot nacionalni standard.
Najnovejši seznami teh nacionalnih standardov z njihovimi bibliografskimi podatki se na zahtevo lahko
dobijo pri Centralnem sekretariatu ali katerikoli članici CENELEC.
Ta evropski standard obstaja v treh izvirnih izdajah (angleški, francoski in nemški). Izdaje v drugih
jezikih, ki jih članice CENELEC na lastno odgovornost prevedejo in izdajo ter prijavijo pri Centralnem
sekretariatu CEN, veljajo kot uradne izdaje.
Člani CENELEC so nacionalni organi za standarde Avstrije, Belgije, Cipra, Češke republike, Danske,
Estonije, Finske, Francije, Grčije, Irske, Islandije, Italije, Latvije, Litve, Luksemburga, Malte,
Madžarske, Nemčije, Nizozemske, Norveške, Poljske, Portugalske, Romunije, Slovaške, Slovenije,
Španije, Švedske, Švice in Združenega kraljestva.
CENELEC
Evropski komite za standardizacijo v elektrotehniki
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
Centralni sekretariat: Rue de Stassart 35, B-1050 Bruselj
© 2006 CENELEC. Lastnice avtorskih pravic so vse države članice CENELEC. Ref. oznaka EN 62305-4:2006 E
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SIST EN 62305-4 : 2006
Predgovor
Besedilo dokumenta 81/265/FDIS, prihodnje 1. izdaje standarda IEC 62305-4, ki ga je pripravil
tehnični odbor IEC/TC 81 Strelovodna zaščita, je CENELEC 1. februarja 2006 po vzporednem
glasovanju v IEC in CENELEC sprejel kot EN 62305-4.
Določena sta bila naslednja datuma:
– zadnji datum, do katerega mora EN dobiti status
nacionalnega standarda bodisi z objavo istovetnega besedila
ali z razglasitvijo (dop) 2006-11-01
– zadnji datum, ko je treba razveljaviti nacionalne standarde,
ki so z EN v nasprotju (dow) 2009-02-01
Ta evropski standard se sklicuje na mednarodne standarde. Kjer je bil ustrezni mednarodni standard
privzet kot evropski standard ali obstaja za isto področje ustrezen izvirni evropski standard, se
namesto sklicevanega mednarodnega standarda uporabi ustrezni evropski. Ustrezne informacije so
dostopne na spletni strani CENELEC.
Razglasitvena objava
Besedilo mednarodnega standarda IEC 62305-4:2006 je CENELEC odobril kot evropski standard brez
sprememb.
2
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SIST EN 62305-4 : 2006
Vsebina Stran
Predgovor .5
Uvod .7
1 Področje uporabe .8
2 Zveza s standardi .8
3 Izrazi in definicije .9
4 Načrtovanje in izvedba sistema zaščitnih ukrepov pred LEMP (LPMS) .12
4.1 Načrtovanje LPMS.15
4.2 Zaščitne cone pred delovanjem strele (LPZ) .15
4.3 Osnovni zaščitni ukrepi v LPMS.19
5 Ozemljevanje in izenačevanje potencialov.19
5.1 Ozemljilni sistem.20
5.2 Povezovalna mreža.22
5.3 Zbiralke za izenačevanje potencialov.26
5,4 Izenačevanje potencialov pri vstopu v LPZ.27
5.5 Materiali in dimenzije komponent za izenačevanje potencialov.27
6 Magnetno oklopljanje in polaganje vodov .28
6.1 Oklop prostora.28
6.2 Oklopljanje notranjih vodov .28
6.3 Polaganje notranjih vodov .28
6.4 Oklopljanje zunanjih vodov.28
6.5 Materiali in dimenzije magnetnih oklopov.28
7 Koordinirana prenapetostna zaščita.29
8 Upravljanje s sistemom LPMS .29
8.1 Plan upravljanja z LPMS .30
8.2 Nadzor sistema LPMS.31
8.3 Vzdrževanje.32
Dodatek A (informativni): Osnove za ovrednotenje elektromagnetnega okolja v LPZ.33
Dodatek B (informativni): Izvedba zaščitnih ukrepov pred LEMP za elektronske sisteme
obstoječih zgradb .54
Dodatek C (informativni): Koordinacija prenapetostnih zaščitnih naprav.69
Dodatek D (informativni): Izbor in namestitev koordinirane prenapetostne zaščite.86
Slika 1: Splošni prikaz razdelitve na različne zaščitne cone LPZ.12
Slika 2: Zaščita pred LEMP – primeri možnih zaščitnih ukrepov zaščite pred LEMP .14
Slika 3: Primeri za povezovanje con LPZ.17
Slika 4: Primeri razširitve zaščitne cone pred delovanjem strele .18
Slika 5: Primer tridimenzionalnega ozemljitvenega sistema, sestavljenega iz povezovalne
mreže, povezane z ozemljilnim sistemom.20
Slika 6: Mrežasti ozemljilni sistem obrata.21
Slika 7: Uporaba ojačitvenih palic zgradbe za izenačevanje potencialov.23
3
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SIST EN 62305-4 : 2006
Slika 8: Izenačevanje potencialov v zgradbi z jekleno armaturo v betonu.24
Slika 9: Integriranje elektronskih sistemov v povezovalno mrežo.25
Slika 10: Kombinacija metod integriranja elektronskih sistemov v povezovalno mrežo .26
Slika A.1: LEMP zaradi udara strele.35
Slika A.2: Simulacija porasta magnetnega polja pri dušenih nihanjih.36
Slika A.3: Oklop z velikim volumnom, izveden s kovinsko armaturo in kovinskimi okvirji.37
Slika A.4: Prostor za električne in elektronske sisteme znotraj LPZ n .38
Slika A.5: Zmanjšanje učinkov indukcije z ustreznim polaganjem vodov in oklopljanjem .40
Slika A.6: Primer LPMS za poslovno stavbo.41
Slika A.7.a: Magnetno polje znotraj LPZ 1 .42
Slika A.8: Ovrednotenje jakosti magnetnega polja za primer udara v bližino .44
Slika A.9: Razdalja s , odvisna od polmera kotaleče krogle in dimenzij objekta .46
a
Slika A.10: Vrste mrežastega oklopa velikih prostorov .48
Slika A.11: Jakost magnetnega polja H znotraj mrežastega oklopa prostora za tip 1 .48
1/max
Slika A.12: Jakost magnetnega polja H znotraj mrežastega oklopa prostora za tip 1 .49
1/max
Slika A.13: Poenostavljeno preskušanje za določitev magnetnega polja znotraj oklopljene zgradbe.50
Slika A.14: Napetosti in toki, inducirani v zankah, ki jo tvorijo vodi.51
Slika B.1: Dograditev zaščitnih ukrepov pred LEMP in elektromagnetne združljivosti v
obstoječih56 zgradbah .56
Slike B.2: Možnosti vzpostavitve več LPZ v obstoječih objektih .61
Slika B.3: Zmanjšanje površine zanke s polaganjem oklopljenih kablov blizu kovinske plošče .63
Slika B.4: Primer dodatnega oklopljanja s kovinsko ploščo .64
Slika B.5: Zaščita anten in druge zunanje opreme.66
Slika B.6: Naravno oklopljanje z lestvami in cevovodi, spojenimi na sistem izenačevanja potencialov .67
Slika B.7: Idealni položaj za vodnike na drogu (prerez jeklenega rešetkastega droga) .68
Slika C.1: Primer uporabe prenapetostne zaščitne naprave v elektroenergetskem sistemu.70
Slika C.2: Osnovni model za koordinacijo energije s prenapetostno zaščitno napravo.71
Slika C.3: Kombinacija dveh napetostno omejevalnih prenapetostnih zaščitnih naprav .73
Slika C.4: Primer dveh napetostno omejevalnih tipov MOV 1 in MOV 2 .74
Slika C.5: Kombinacija napetostno stikalnega iskrišča in napetostno omejevalnega varistorja MOV.75
Slika C.6: Primer z napetostno preklopnim iskriščem in napetostno omejevalnim MOV.77
Slika C.7: Določitev prilagoditvene induktivnosti za udarni val 10/350 µs in 0,1 kA/µs .78
Slika C.8: Primer z iskriščem (SG) in MOV za udarni val 10/350 µs .80
Slika C.9: Primer z iskriščem (SG) in MOV za udarni val 0,1 kA/µs .82
Slika C.10: Koordinacija varianta I – napetostno omejevalni tip prenapetostne zaščitne naprave.83
Slika C.11: Koordinacija varianta II – napetostno omejevalni tip prenapetostne zaščitne naprave.83
Slika C.12: Koordinacija varianta III – napetostno stikalni tip prenapetostne zaščitne naprave
in napetostno omejevalni tip prenapetostne zaščitne naprave .84
Slika C.13: Koordinacija varianta IV – več prenapetostnih zaščitnih naprav v enem elementu .84
Slika C.14: Koordinacija z metodo »prehoda energije« .85
Slika D.1: Udarna napetost med vodnikom pod napetostjo in zbiralko za izenačevanje potencialov.87
4
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SIST EN 62305-4 : 2006
Predgovor
1) IEC (Mednarodna elektrotehniška komisija) je svetovna organizacija za standardizacijo, ki
združuje vse nacionalne elektrotehnične komiteje (nacionalni komiteji IEC). Cilj IEC je pospeševati
mednarodno sodelovanje v vseh vprašanjih standardizacije s področja elektrotehnike in
elektronike. V ta namen poleg drugih aktivnosti izdaja mednarodne standarde. Za njihovo pripravo
so odgovorni tehnični odbori (TC). Vsak nacionalni komite IEC, ki ga zanima obravnavana tema,
lahko sodeluje v tem pripravljalnem delu. Prav tako lahko v pripravi sodelujejo mednarodne
organizacije ter vladne in nevladne ustanove, ki so povezane z IEC. IEC deluje v tesni povezavi z
mednarodno organizacijo za standardizacijo ISO skladno s pogoji, določenimi v soglasju med
obema organizacijama.
2) Uradne odločitve ali sporazumi IEC o tehničnih vprašanjih, pripravljeni v tehničnih odborih, kjer so
prisotni vsi nacionalni komiteji, ki jih tema zanima, izražajo, kolikor je mogoče, mednarodno
soglasje o obravnavani temi.
3) Publikacije IEC imajo obliko priporočil za mednarodno uporabo ter jih kot takšne sprejmejo
nacionalni komiteji IEC. Čeprav IEC skuša zagotavljati natančnost tehničnih vsebin v publikacijah
IEC, IEC ni odgovoren za način uporabe ali za možne napačne interpretacije končnih
uporabnikov.
4) Da bi se pospeševalo mednarodno poenotenje, so nacionalni komiteji IEC v svojih nacionalnih in
regionalnih standardih dolžni čim pregledneje uporabljati mednarodne standarde. Vsako
odstopanje med standardom IEC in ustreznim nacionalnim ali regionalnim standardom je treba v
slednjem jasno označiti
5) IEC ni določil nobenega postopka v zvezi z označevanjem kot znakom strinjanja in ne prevzema
nikakršne odgovornosti za opremo, ki je deklarirana, da ustreza kateremu od publikacij IEC.
6) Vsi uporabniki bi naj si zagotovili zadnjo izdajo teh publikacij.
7) IEC ali njegovi direktorji, zaposleni, uslužbenci ali agenti, vključno s samostojnimi strokovnjaki ter
člani tehničnih odborov in nacionalnih komitejev IEC, ne prevzemajo nobene odgovornosti za
kakršno koli osebno poškodbo, škodo na premoženju ali katero koli drugo škodo kakršne koli
vrste, bodisi posredne ali neposredne, ali za stroške (vključno z zakonitim lastništvom) in izdatke,
povezane s publikacijo, njeno uporabo ali zanašanjem na to publikacijo IEC ali katero koli drugo
publikacijo IEC.
8) Posebno pozornost je treba posvetiti normativnim virom, na katere se sklicuje ta publikacija.
Uporaba navedenih publikacij je nujna za pravilno uporabo te publikacije.
9) Opozarjamo na možnost, da bi lahko bil kateri od elementov tega mednarodnega standarda
predmet patentnih pravic. IEC ne odgovarja za identifikacijo nobene od teh patentnih pravic.
Mednarodni standard IEC 62305-4 je pripravil tehnični odbor IEC/TC 81 Strelovodna zaščita.
Skupina standardov IEC 62305 (deli od 1 do 5) je izdelana v skladu z novim programom dela, ki so ga
odobrili nacionalni komiteji (81/171/RQ (2001-06-29)), ter v preprostejši in racionalnejši obliki
restrukturira in posodablja skupine standardov IEC 61024, IEC 61312 in IEC 61663.
Besedilo te prve izdaje standarda IEC 62305-4 je združeno iz naslednjih standardov in jih nadomešča:
– IEC 61312-1, prva izdaja (1995);
– IEC 61312-2, prva izdaja (1998);
– IEC 61312-3, prva izdaja (2000);
– IEC 61312-4, prva izdaja (1998).
5
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SIST EN 62305-4 : 2006
Besedilo tega standarda temelji na naslednjih dokumentih:
FDIS Poročilo o glasovanju
81/265/FDIS 81/270/RVD
Celotna informacija o glasovanju za sprejetje tega standarda je na voljo v poročilu o glasovanju,
navedenem v gornji preglednici.
Ta izdaja je bila pripravljena kolikor je mogoče v skladu drugim delom Direktiv ISO/IEC.
IEC 62305 sestavljajo naslednji deli pod skupnim naslovom Zaščita pred delovanjem strele:
1. del: Splošna načela
2. del: Vodenje tveganja
3. del Fizična škoda na zgradbah in nevarnost za živa bitja
4. del: Električni in elektronski sistemi v zgradbah
1)
5. del: Oskrba
Odbor se je odločil, da bo vsebina te publikacije ostala nespremenjena do datuma, ko bodo znani
rezultati pregleda vzdrževanja standarda in ki je objavljen na spletni strani IEC
»http://webstore.iec.ch« pod datumom v zvezi s posebnimi publikacijami. S tem datumom bo
publikacija:
– ponovno potrjena,
– umaknjena,
– zamenjana z revidirano izdajo,
– dopolnjena.
1)
V pripravi.
6
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SIST EN 62305-4 : 2006
Uvod
Strela kot vir škode je visokoenergijski pojav. Pri udarih strele se sprosti več sto mega joulov energije.
V primerjavi z milijouli, ki so dovolj, da uničijo občutljivo elektronsko opremo v električnih in
elektronskih sistemih v objektih, je popolnoma razumljivo, da je za zaščito te opreme treba uporabiti
dodatne zaščitne ukrepe.
Potreba po tem mednarodnem standardu je nastala zaradi povečanja stroškov napak električnih in
elektronskih sistemov, ki jih povzročijo vplivi udara strele. Še posebej pomembni so elektronski
sistemi, uporabljeni v sistemih podatkovnega procesiranja in njihovega hranjenja, ter tudi procesno
vodenje in zaščita v okoljih velikih dimenzij, kompleksnosti in stroškov gradnje (kjer so izpadi zelo
nezaželeni tako s finančnega kot tudi z varnostnega vidika).
Udar strele lahko povzroči različne vrste škod v objektu, kot je navedeno v standardu SIST IEC
62305-2:
D1 poškodbe živih bitij zaradi povišane napetosti dotika in koraka;
D2 materialna škoda zaradi mehanskih, toplotnih, kemičnih in eksplozivnih vplivov;
D3 škoda na električnih in elektronskih sistemih zaradi elektromagnetnih vplivov.
SIST IEC 62305-3 obravnava zaščitne ukrepe za zmanjšanje rizika materialne škode in nevarnosti za
življenje, vendar ne obravnava zaščite električnih in elektronskih sistemov.
Ta 4. del standarda SIST IEC 62305 zato ponuja informacijo o zaščitnih ukrepih za zmanjšanje rizika
trajne škode na električnih in elektronskih sistemih znotraj objektov.
Trajno škodo na električnih in elektronskih sistemih lahko povzroči elektromagnetni udar strele z:
a) (napetostnim) udarom po vodnikih ali z induciranim (napetostnim) udarom, ki pride do naprave
po priključnih vodnikih,
b) vplivom sevanih elektromagnetnih polj neposredno v napravo.
Udarni valovi na objekt lahko nastanejo zunaj objekta ali v njem:
– udarni valovi zunaj objekta nastanejo pri udaru strele v objekt vstopajoče oskrbovalne vode ali
udara v bližnja tla, pri čemer se vplivi preko teh povezav prenašajo v električne in elektronske
sisteme;
– udarni valovi znotraj objekta nastanejo zaradi udara strele v objekt ali udara v bližnja tla.
Mehanizmi elektromagnetnega sklopa so lahko različni:
– uporovni sklop (npr. impedanca ozemljilnega sistema ali upor oklopa kablov);
– magnetni sklop – sklop prek magnetnega polja (npr. zaradi zank ožičenja v električnih in
elektronskih sistemih ali zaradi induktivnosti povezovalnih vodnikov);
– kapacitivni sklop – sklop prek električnega polja (npr. zaradi antenskega sprejema palice).
OPOMBA: Vpliv kapacitivnega skopa je v splošnem zanemarljiv v primerjavi z magnetnim sklopom.
Elektromagnetna polja lahko nastanejo:
– zaradi toka strele, ki teče skozi kanal strele,
– zaradi delnega toka strele, ki teče po vodnikih (npr. odvodni vodniki zunanjega LPS po
standardu SIST IEC 62305-3 ali skozi zunanji oklop prostora po tem standardu).
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SIST EN 62305-4 : 2006
Zaščita pred delovanjem strele – 4. del: Električni in elektronski sistemi v zgradbah
1 Področje uporabe
Ta del standarda IEC 62305 se uporablja za načrtovanje, izvedbo, nadzor, vzdrževanje in preskušanje
zaščitnih ukrepov pred LEMP za električne in elektronske sisteme v zgradbah, s pomočjo katerih je
mogoče zmanjšati riziko trajnih okvar zaradi vpliva elektromagnetnega udara strele.
Ta del standarda IEC 62305 se ne uporablja za zaščito pred elektromagnetnimi vplivi, ki bi lahko
povzročili napačno delovanje elektronskih sistemov. Kljub temu pa se lahko vsebina, prikazana v
dodatku A, uporabi za ovrednotenje teh motenj. Zaščitni ukrepi pred elektromagnetnimi vplivi so
obravnavani v standardu IEC 60364-4-44 in v skupini standardov IEC 61000.
Ta del standarda IEC 62305 daje smernice za sodelovanje med načrtovalcem električnih in
elektronskih sistemov in načrtovalcem sistema zaščite pred učinki elektromagnetnega udara strele, da
bi bila zaščita optimalno učinkovita.
Ta standard ne obravnava podrobnosti samih električnih in elektronskih sistemov.
2 Zveze s standardi
Spodaj navedeni standardi so nujno potrebni pri uporabi tega dokumenta. Pri datiranem sklicevanju se
upoštevajo samo navedene izdaje. Pri nedatiranem sklicevanju se upoštevajo zadnje izdaje
navedenih dokumentov (vključno s popravki in dopolnili).
IEC 60364-4-44:2001 Električne inštalacije zgradb – 4-44. del: Zaščitni ukrepi – Zaščita pred
prenapetostmi – Zaščita pred napetostnimi motnjami in pred
elektromagnetnimi motnjami
Electrical installations of buildings – Part 4-44: Protection for safety –
Protection against voltage disturbances and electromagnetic disturbances
IEC 60364-5-53:2001 Električne inštalacije zgradb – 5-53. del: Izbira in namestitev električne
opreme – Ločevanje, stikanje in krmiljenje
Electrical installations of building – Part 5-53: Selection and erection of
electrical equipment – Isolation, switching and control
IEC 60664-1:2002 Uskladitev izolacije za opremo v okviru nizkonapetostnih sistemov – 1. del:
Načela, zahteve in preskusi
Insulation coordination for equipment within low-voltage systems – Part 1:
Principles, requirements and tests
IEC 61000-4-5:1995 Elektromagnetna združljivost (EMC) – 4-5. del: Preskusne in merilne tehnike
– Preskus odpornosti proti napetostnemu udaru
Electromagnetic compatibility (EMC) – Part 4-5: Testing and measurement
techniques – Surge immunity test
IEC 61000-4-9:1993 Elektromagnetna združljivost (EMC) – 4-9. del: Preskusne in merilne tehnike
– Preskus odpornosti proti impulznemu magnetnemu polju
Electromagnetic compatibility (EMC) – Part 4-9: Testing and measurement
techniques – Pulse magnetic field immunity test
IEC 61000-4-10:1993 Elektromagnetna združljivost (EMC) – 4-10. del: Preskusne in merilne
tehnike – Preskus odpornosti proti dušenim nihajnim magnetnim poljem
Electromagnetic compatibility (EMC) – Part 4-10: Testing and measurement
techniques – Damped oscillatory magnetic field immunity test
IEC 61000-5-2:1997 Elektromagnetna združljivost (EMC) – 5. del: Smernice za inštaliranje in
blažitev – 2. oddelek: Ozemljitev in pokabljenje
Electromagnetic compatibility (EMC) – Part 5: Installation and mitigation
guidelines – Section 2: Earthing and cabling
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