SIST EN 50397-3:2022
(Main)Covered conductors for overhead lines and the related accessories for rated voltages above 1 kV a.c. and not exceeding 36 kV a.c. - Part 3: Guide to use
Covered conductors for overhead lines and the related accessories for rated voltages above 1 kV a.c. and not exceeding 36 kV a.c. - Part 3: Guide to use
This part of EN 50397 provides general recommendations for the selection, storage, transportation and installation of the covered conductors and the related accessories specified in Parts 1 and 2 of the standard, unless otherwise specified. Safety regulations and environmental regulations as well as rules for installation and mechanical design are not considered in this Guide to use, as they are covered by relevant national regulations and laws. Relevant national regulations are not considered in this guide, but shall always be consulted as appropriate.
NOTE The term "national regulations" is used throughout this guide. It may include specific safety regulations, rules of installation and other relevant instructions which, depending upon the particular country or district, may exist in a legislative (mandatory) form, or as a non-mandatory code of practice. In addition certain specific utilities may have their own safety practices.
It is assumed that the design of installations, the purchase and installation of covered conductors and of the related accessories specified in this EN is entrusted to suitably skilled and competent people. In case of doubt as to the suitability of covered conductors and the related accessories for a particular use, further specific information shall be obtained from the manufacturer.
Kunststoffumhüllte Leiter und zugehörige Armaturen für Freileitungen mit Nennspannungen über 1 kV und nicht mehr als 36 kV Wechselspannung - Teil 3: Leitfaden für die Verwendung
Dieser Teil von EN 50397 gibt allgemeine Empfehlungen für die Auswahl, Lagerung, den Transport und die Montage der in EN 50397-1 und EN 50397-2 beschriebenen kunststoffumhüllten Leiter und der zugehörigen Armaturen, wenn nichts anderes festgelegt wurde. Die Sicherheits- und Umweltbestimmungen, sowie die Bestimmungen für die Installation und die mechanische Konstruktion werden in dieser Empfehlung für Verwendung nicht betrachtet, sie sind durch einschlägige nationale Vorschriften und Gesetze abgedeckt. Einschlägige nationale Vorschriften werden in dieser Empfehlung nicht betrachtet, es wird jedoch empfohlen, diese, soweit erforderlich, heranzuziehen.
ANMERKUNG In diesem Leitfaden wird der Begriff „nationale Vorschrift“ verwendet. Dies kann besondere Sicherheits-bestimmungen, Installationsregeln und andere zutreffende Anweisungen einschließen, die auf bestimmten Regionen beruhen und in Gesetzesform oder als unverbindliche Praxiserfahrung vorliegen. Zusätzlich können besondere Hilfsmittel ihre eigenen Sicherheitsregeln besitzen.
Es wird vorausgesetzt, dass der Entwurf von Anlagen, der Kauf und die Installation von kunststoffumhüllten Leitern und der zugehörigen Armaturen nach diesem Dokument angemessen ausgebildeten und kompetenten Personen anvertraut wird. Falls Zweifel an der Eignung der Kabel bzw. der zugehörigen Armaturen für eine bestimmte Anwendung bestehen, sind weitergehende Informationen vom Kabelhersteller einzuholen.
Conducteurs gainés pour lignes aériennes et accessoires associés pour des tensions assignées supérieures à 1 kV en courant alternatif et ne dépassant pas 36 kV en courant alternatif - Partie 3: Guide d'emploi
La présente partie de l'EN 50397 fournit des recommandations générales pour le choix, le stockage, le transport et la pose des conducteurs gainés et des accessoires associés spécifiés dans l'EN 50397 1 et l'EN 50397 2, sauf spécification contraire par ailleurs. Les règlements relatifs à la sécurité et à l'environnement ainsi que les règles pour l'installation et la conception mécanique ne sont pas traités dans ce Guide d'emploi du fait qu'ils sont couverts par des lois et des règlementations nationales pertinentes. Les règlementations nationales pertinentes ne sont pas prises en compte dans ce guide, mais il est conseillé de toujours les consulter si nécessaire.
NOTE Le terme "règlementations nationales" est utilisé tout au long du présent guide. Il peut comprendre des règlements de sécurité spécifiques, des règles d'installation et autres instructions pertinentes qui, en fonction des spécificités nationales ou régionales, peuvent exister sous forme de loi (obligatoire) ou de code de bonne pratique non obligatoire. De plus, certains fournisseurs d'énergie peuvent avoir leur propre code de sécurité.
Il est admis par hypothèse que l'étude des installations, l'achat et la pose des conducteurs gainés et des accessoires associés spécifiés dans le présent document sont assurés par des personnes formées et compétentes dans le domaine. En cas de doute concernant l'adéquation des conducteurs gainés et des accessoires associés pour un usage particulier, des informations complémentaires spécifiques doivent être obtenues auprès du fabricant.
Oplaščeni vodniki za nadzemne vode in ustrezni pribor za naznačene izmenične napetosti nad 1 kV, ki ne presegajo 36 kV - 3. del: Vodilo za uporabo
Ta del standarda EN 50397 podaja splošna priporočila za izbiro, shranjevanje, prevoz in namestitev oplaščenih vodnikov ter ustreznega pribora iz 1. in 2. dela standarda, razen če je določeno drugače. Varnostni in okoljski predpisi ter pravila glede namestitve in mehanske zasnove v tem vodilu za uporabo niso obravnavani, saj so zajeti v ustreznih nacionalnih predpisih in zakonih. Zadevni nacionalni predpisi prav tako niso obravnavani, vendar ji je treba vselej ustrezno preučiti.
OPOMBA: Izraz »nacionalni predpisi« se uporablja v celotnem vodilu. Vključuje lahko posebne varnostne predpise, pravila za namestitev in druga pomembna navodila, ki lahko (odvisno od posamezne države oziroma območja) obstajajo v zakonski (obvezni) obliki ali kot neobvezen kodeks ravnanja. Poleg tega lahko določeni pripomočki vključujejo lastne varnostne prakse.
Predpostavlja se, da načrtovanje namestitve ter nakup in namestitev oplaščenih vodnikov oziroma ustreznega pribora iz tega standarda EN izvede ustrezno usposobljen strokovnjak. Če obstaja dvom glede ustreznosti oplaščenih vodnikov in ustreznega pribora za posebno uporabo, je treba od proizvajalca pridobiti nadaljnje specifične informacije.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 50397-3:2022
01-oktober-2022
Nadomešča:
SIST EN 50397-3:2010
Oplaščeni vodniki za nadzemne vode in ustrezni pribor za naznačene izmenične
napetosti nad 1 kV, ki ne presegajo 36 kV - 3. del: Vodilo za uporabo
Covered conductors for overhead lines and the related accessories for rated voltages
above 1 kV a.c. and not exceeding 36 kV a.c. - Part 3: Guide to use
Kunststoffumhüllte Leiter und zugehörige Armaturen für Freileitungen mit
Nennspannungen über 1 kV und nicht mehr als 36 kV Wechselspannung - Teil 3:
Leitfaden für die Verwendung
Conducteurs gainés pour lignes aériennes et accessoires associés pour des tensions
assignées supérieures à 1 kV en courant alternatif et ne dépassant pas 36 kV en courant
alternatif - Partie 3: Guide d'emploi
Ta slovenski standard je istoveten z: EN 50397-3:2022
ICS:
29.060.20 Kabli Cables
29.240.20 Daljnovodi Power transmission and
distribution lines
SIST EN 50397-3:2022 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN 50397-3:2022
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SIST EN 50397-3:2022
EUROPEAN STANDARD EN 50397-3
NORME EUROPÉENNE
EUROPÄISCHE NORM July 2022
ICS 29.240.20 Supersedes EN 50397-3:2010
English Version
Covered conductors for overhead lines and the related
accessories for rated voltages above 1 kV a.c. and not
exceeding 36 kV a.c. - Part 3: Guide to use
Conducteurs gainés pour lignes aériennes et accessoires Kunststoffumhüllte Leiter und zugehörige Armaturen für
associés pour des tensions assignées supérieures à 1 kV Freileitungen mit Nennspannungen über 1 kV und nicht
en courant alternatif et ne dépassant pas 36 kV en courant mehr als 36 kV Wechselspannung - Teil 3: Leitfaden für die
alternatif - Partie 3: Guide d'emploi Verwendung
This European Standard was approved by CENELEC on 2022-06-27. 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 CEN-CENELEC
Management Centre 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 CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Türkiye and the United Kingdom.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2022 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 50397-3:2022 E
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SIST EN 50397-3:2022
EN 50397-3:2022 (E)
Contents Page
European foreword . 4
Introduction. 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Covered conductors . 7
4.1 Recommendations for selection of covered conductors . 7
4.2 Recommendation for storage and transport . 8
4.3 Recommendation for installation of covered conductors . 11
4.4 Other recommendations . 14
5 Accessories . 14
5.1 General . 14
5.2 Joints . 14
5.3 Insulators . 15
5.4 Fittings . 15
5.5 Earthing devices . 17
5.6 Arc protection devices . 18
5.7 Surge arresters . 19
5.8 Bird protection . 19
5.9 Corona protection . 19
Bibliography . 20
2
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SIST EN 50397-3:2022
EN 50397-3:2022 (E)
Figures
Figure 1 — View from the top. 9
Figure 2 — Keep the drum standing upright, using wedges in the heels of the flanges . 9
Figure 3 — Only drums with protection lagging may be piled flange on flange. Lower layer
to be secured over full drum width . 9
Figure 4 — Not recommended . 10
Figure 5 — Drums may be lifted either by crane or fork-lift truck . 10
Figure 6 — Rolling the drums. 10
Figure 7 — Recommended direction . 11
Figure 8 — Not recommended direction . 11
Figure 9 — Unwind this way . 12
Figure 10 — Never unwind this way . 13
Figure 11 — Example of a joint . 14
Figure 12 — Example of a tie . 15
Figure 13 — Example of a bolted tension clamp. 16
Figure 14 — Example of a helical fitting . 16
Figure 15 — Example of a wedge type tension clamp . 17
Figure 16 — Example of a tee off connection . 17
Figure 17 — Example for an earthing device . 17
Figure 18 — Arc phase to phase . 18
Figure 19 — Arc phase to cross arm . 18
Figure 20 — Example of two types of arc protection devices . 18
Figure 21 — Example of arc protection device for angle constructions . 19
Figure 22 — Example of arc protection device combined with surge arrester . 19
3
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SIST EN 50397-3:2022
EN 50397-3:2022 (E)
European foreword
This document (EN 50397-3:2022) has been prepared by CLC/TC 20 "Electric cables".
The following dates are fixed:
• latest date by which this document has to be (dop) 2023-06-27
implemented at national level by publication of
an identical national standard or by
endorsement
• latest date by which the national standards (dow) 2025-06-27
conflicting with this document have to be
withdrawn
This document supersedes EN 50397-3:2010, and all of its amendments and corrigenda (if any).
EN 50397-3:2022 has been updated editorially with respect to EN 50397-3:2010.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
Any feedback and questions on this document should be directed to the users’ national committee. A
complete listing of these bodies can be found on the CENELEC website.
4
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SIST EN 50397-3:2022
EN 50397-3:2022 (E)
Introduction
EN 50397 “Covered conductors for overhead lines and the related accessories for rated voltages above
1 kV a.c. and not exceeding 36 kV a.c.” consists of three parts. These are:
— Part 1: Covered conductors;
— Part 2: Accessories for covered conductors - Tests and acceptance criteria;
— Part 3: Guide to use.
This Part 3 “Guide to use” assumes that the user will benefit from a single document that gives guidance
on all the equipment specified within the other two parts.
5
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SIST EN 50397-3:2022
EN 50397-3:2022 (E)
1 Scope
This part of EN 50397 provides general recommendations for the selection, storage, transportation and
installation of the covered conductors and the related accessories specified in EN 50397-1 and
EN 50397-2, unless otherwise specified. Safety regulations and environmental regulations as well as rules
for installation and mechanical design are not considered in this Guide to use, as they are covered by
relevant national regulations and laws. Relevant national regulations are not considered in this guide, but
it is advised that they are always consulted as appropriate.
NOTE The term “national regulations” is used throughout this guide. It can include specific safety regulations,
rules of installation and other relevant instructions which, depending upon the particular country or district, can exist in
a legislative (mandatory) form, or as a non-mandatory code of practice. In addition, certain specific utilities can have
their own safety practices.
It is assumed that the design of installations, the purchase and installation of covered conductors and of
the related accessories specified in this document are entrusted to suitably skilled and competent people.
In case of doubt as to the suitability of covered conductors and the related accessories for a particular use,
further specific information is expected to be obtained from the manufacturer.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes
requirements 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.
EN 50397-1:2006, Covered conductors for overhead lines and the related accessories for rated voltages
above 1 kV a.c. and not exceeding 36 kV a.c. — Part 1: Covered conductors
EN 50397-2, Covered conductors for overhead lines and the related accessories for rated voltages above
1 kV AC and not exceeding 36 kV AC — Part 2: Accessories for covered conductors — Tests and
acceptance criteria
1
EN 50182:2001 , Conductors for overhead lines — Round wire concentric lay stranded conductors
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp
— IEC Electropedia: available at https://www.electropedia.org/
3.1
rated tensile strength
RTS
estimate of the conductor breaking load calculated using the specified tensile properties of the components
wires
Note 1 to entry: See EN 50397-1:2006, 4.2.1.
1
As impacted by EN 50182:2001/AC:2013, EN 50182:2001/corrigendum Apr. 2004, EN 50182:2001/corrigendum Jul.
2001 and EN 50182:2001/corrigendum Jun. 2005.
6
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SIST EN 50397-3:2022
EN 50397-3:2022 (E)
3.2
specified minimum failure load
SMFL
minimum load, specified by the purchaser or declared by the supplier, at which mechanical failure will not
take place
Note 1 to entry: From the probabilistic point of view, the specified minimum failure load corresponds to the value
having the probability of e % in the distribution function of the strength of the fitting. The exclusion limit e % is usually
taken within 2 % to 5 % with 10 % being the upper limit (see IEC 60826).
3.3
slippage factor
X-value
ratio between the tensile force on the covering of the conductor when a certain slippage starts to occur and
the RTS of the conductor
Note 1 to entry: See EN 50397-1:2006, Annex D.
Note 2 to entry: An X-value of e.g. 100 % means that at a force up to RTS no relative slippage between the covering
and the conductor occurs.
4 Covered conductors
4.1 Recommendations for selection of covered conductors
4.1.1 General
Covered conductors specified in EN 50397-1 are equipped with a polymeric covering as protection against
accidental contact with grounded parts or other live covered conductors. Covered conductors are not touch
proof, so they shall to be treated as non-protected plain conductors with regard to protection against electric
shock.
The use of covered conductors is only permissible in air and mounted on suitable insulators, which are at
least specified for the rated voltage of the overhead line.
4.1.2 Power frequency range
Covered conductors are intended to be used in the power frequency range of 49 Hz to 61 Hz.
4.1.3 Current rating
Reference shall be made either to EN 50397-1:2006, Annex A, to EN 50182 or to the manufacturer's
specifications to obtain the current ratings of the selected conductor cross sections and the maximum
permissible conductor temperature for the covering material as given in EN 50397-1:2006, 4.2.3.
If covered conductors in accordance with EN 50397-1 are exposed to strong solar radiation or high
temperature ambient conditions, the current carrying capacity shall be reduced accordingly.
4.1.4 Operating conditions
In addition to the current ratings, due regard shall be given to:
a) the capability of the covered conductor to withstand the worst anticipated fault conditions of the system;
b) the earth loop impedance;
c) the operating characteristics of the connected equipment;
d) the voltage drop requirements for long distance conditions.
7
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SIST EN 50397-3:2022
EN 50397-3:2022 (E)
In certain cases, longitudinal watertight conductor constructions can be necessary to avoid corrosive effects
to the conductor and to obtain a sufficient life time of the overhead line system.
4.2 Recommendation for storage and transport
4.2.1 General
Suitable protection, appropriate to the choice of covered conductors and the installation conditions, shall
be provided against mechanical damage.
Covered conductors stored at temperatures which are below those recommended for installation shall not
be subject to any mechanical stress including shocks, impact, bending and torsion. It is recommended not
to store complete reels in conditions, where the maximum permissible conductor temperature as given in
EN 50397-1:2006, 4.2.3 is exceeded.
4.2.2 Sealing and drumming
4.2.2.1 Clearance and lagging
In general, it is recommended to use lagging or other equivalent protection to avoid damage to the covered
conductor. If lagging is used the thickness shall be appropriate.
The distance between the outer layer of the covered conductor on the filled drum and the ground or lagging
shall be sufficient to avoid damage to the covered conductor. It is recommended to use a clearance of at
least 50 mm.
4.2.2.2 Barrel diameter
The barrel diameter of delivery drums shall not be smaller than 30 x D, where D is the outer diameter of
the covered conductor.
4.2.2.3 Sealing
The ends of covered conductors shall be sealed to prevent ingress of moisture during transport and storage.
The possibility of damage to moisture seals during transport and storage shall be borne in mind. Where
such damage may have occurred, the conductor end shall be inspected and the seal remade.
4.2.2.4 Handling
When handling drums, suitable precautions shall be taken to avoid damage to the covered conductor and
...
SLOVENSKI STANDARD
oSIST prEN 50397-3:2021
01-oktober-2021
Oplaščeni vodniki za nadzemne vode in ustrezen pribor za naznačene izmenične
napetosti nad 1 kV, ki ne presegajo 36 kV - 3. del: Vodilo za uporabo
Covered conductors for overhead lines and the related accessories for rated voltages
above 1 kV a.c. and not exceeding 36 kV a.c. - Part 3: Guide to use
Kunststoffumhüllte Leiter und zugehörige Armaturen für Freileitungen mit
Nennspannungen über 1 kV und nicht mehr als 36 kV Wechselspannung - Teil 3:
Leitfaden für die Verwendung
Conducteurs gainés pour lignes aériennes et accessoires associés pour des tensions
assignées supérieures à 1 kV en courant alternatif et ne dépassant pas 36 kV en courant
alternatif - Partie 3: Guide d'emploi
Ta slovenski standard je istoveten z: prEN 50397-3
ICS:
29.060.20 Kabli Cables
29.240.20 Daljnovodi Power transmission and
distribution lines
oSIST prEN 50397-3:2021 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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oSIST prEN 50397-3:2021
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oSIST prEN 50397-3:2021
EUROPEAN STANDARD DRAFT
prEN 50397-3
NORME EUROPÉENNE
EUROPÄISCHE NORM
August 2021
ICS 29.240.20 Will supersede EN 50397-3:2010 and all of its
amendments and corrigenda (if any)
English Version
Covered conductors for overhead lines and the related
accessories for rated voltages above 1 kV a.c. and not
exceeding 36 kV a.c. - Part 3: Guide to use
Conducteurs gainés pour lignes aériennes et accessoires Kunststoffumhüllte Leiter und zugehörige Armaturen für
associés pour des tensions assignées supérieures à 1 kV Freileitungen mit Nennspannungen über 1 kV und nicht
en courant alternatif et ne dépassant pas 36 kV en courant mehr als 36 kV Wechselspannung - Teil 3: Leitfaden für die
alternatif - Partie 3: Guide d'emploi Verwendung
This draft European Standard is submitted to CENELEC members for enquiry.
Deadline for CENELEC: 2021-11-05.
It has been drawn up by CLC/TC 20.
If this draft becomes a European Standard, 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.
This draft European Standard was established by CENELEC 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 CEN-CENELEC Management Centre has the same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are aware and to
provide supporting documentation.
Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and
shall not be referred to as a European Standard.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2021 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Project: 73758 Ref. No. prEN 50397-3 E
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oSIST prEN 50397-3:2021
1 Contents Page
2 European foreword . 4
3 Introduction. 5
4 1 Scope . 6
5 2 Normative references . 6
6 3 Terms and definitions . 6
7 4 Covered conductors . 7
8 4.1 Recommendations for selection of covered conductors . 7
9 4.2 Recommendation for storage and transport . 8
10 4.3 Recommendation for installation of covered conductors . 11
11 4.4 Other recommendations . 14
12 5 Accessories . 14
13 5.1 General . 14
14 5.2 Joints . 14
15 5.3 Insulators . 15
16 5.4 Fittings . 15
17 5.5 Earthing devices . 17
18 5.6 Arc protection devices . 18
19 5.7 Surge arresters . 19
20 5.8 Bird protection . 19
21 5.9 Corona protection . 19
22 Bibliography . 20
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oSIST prEN 50397-3:2021
prEN 50397-3:2021 (E)
23 Figures
24 Figure 1 — View from the top. 9
25
Figure 2 — Keep the drum standing upright, using wedges in the heels of the flanges . 9
26 Figure 3 — Only drums with protection lagging may be piled flange on flange. Lower layer
27 to be secured over full drum width . 9
28 Figure 4 — Not recommended . 10
29 Figure 5 — Drums may be lifted either by crane or fork-lift truck . 10
30 Figure 6 — Rolling the drums. 10
31 Figure 7 — Recommended direction . 11
32 Figure 8 — Not recommended direction . 11
33 Figure 9 — Unwind this way . 12
34 Figure 10 — Never unwind this way . 13
35 Figure 11 — Example of a joint . 14
36 Figure 12 — Example of a tie . 15
37 Figure 13 — Example of a bolted tension clamp. 16
38 Figure 14 — Example of a helical fitting . 16
39 Figure 15 — Example of a wedge type tension clamp . 17
40 Figure 16 — Example of a tee off connection . 17
41 Figure 17 — Example for an earthing device . 17
42 Figure 18 — Arc phase to phase . 18
43 Figure 19 — Arc phase to cross arm . 18
44 Figure 20 — Example of two types of arc protection devices . 18
45 Figure 21 — Example of arc protection device for angle constructions . 19
46 Figure 22 — Example of arc protection device combined with surge arrester . 19
3
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oSIST prEN 50397-3:2021
prEN 50397-3:2021 (E)
47 European foreword
48 This document prEN 50397-3:2021 has been prepared by CLC/TC 20 "Electric cables".
49 This document is currently submitted to the Enquiry.
50 The following dates are proposed:
• latest date by which the existence of this (doa) dor + 6 months
document has to be announced at national
level
• latest date by which this document has to be (dop) dor + 12 months
implemented at national level by publication of
an identical national standard or by
endorsement
• latest date by which the national standards (dow) dor + 36 months
conflicting with this document have to be (to be confirmed or
withdrawn modified when voting)
51 This document will supersede EN 50397-3:2010 and all of its amendments and corrigenda (if any).
4
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oSIST prEN 50397-3:2021
prEN 50397-3:2021 (E)
52 Introduction
53 EN 50397 “Covered conductors for overhead lines and the related accessories for rated voltages above
54 1 kV a.c. and not exceeding 36 kV a.c.” consists of three parts. These are:
55 — Part 1: Covered conductors;
56 — Part 2: Accessories for covered conductors - Tests and acceptance criteria;
57 — Part 3: Guide to use.
58 This Part 3 “Guide to use” assumes that the user will benefit from a single document that gives guidance
59 on all the equipment specified within the other two parts.
5
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oSIST prEN 50397-3:2021
prEN 50397-3:2021 (E)
60 1 Scope
61 This part of EN 50397 provides general recommendations for the selection, storage, transportation and
62 installation of the covered conductors and the related accessories specified in EN 50397-1 and
63 EN 50397-2, unless otherwise specified. Safety regulations and environmental regulations as well as rules
64 for installation and mechanical design are not considered in this Guide to use, as they are covered by
65 relevant national regulations and laws. Relevant national regulations are not considered in this guide, but
66 it is advised that they are always consulted as appropriate.
67 NOTE The term “national regulations” is used throughout this guide. It can include specific safety regulations,
68 rules of installation and other relevant instructions which, depending upon the particular country or district, can exist in
69 a legislative (mandatory) form, or as a non-mandatory code of practice. In addition certain specific utilities can have
70 their own safety practices.
71 It is assumed that the design of installations, the purchase and installation of covered conductors and of
72 the related accessories specified in this document are entrusted to suitably skilled and competent people.
73 In case of doubt as to the suitability of covered conductors and the related accessories for a particular use,
74 further specific information shall be obtained from the manufacturer.
75 2 Normative references
76 The following documents are referred to in the text in such a way that some or all of their content constitutes
77 requirements of this document. For dated references, only the edition cited applies. For undated references,
78 the latest edition of the referenced document (including any amendments) applies.
79 EN 50397-1:2006, Covered conductors for overhead lines and the related accessories for rated voltages
80 above 1 kV a.c. and not exceeding 36 kV a.c. - Part 1: Covered conductors
81 EN 50397-2, Covered conductors for overhead lines and the related accessories for rated voltages above
82 1 kV a.c. and not exceeding 36 kV a.c. - Part 2: Accessories for covered conductors - Tests and acceptance
83 criteria
84 EN 50182, Conductors for overhead lines - Round wire concentric lay stranded conductors
85 3 Terms and definitions
86 For the purposes of this document, the following terms and definitions apply.
87 ISO and IEC maintain terminological databases for use in standardization at the following addresses:
88 — ISO Online browsing platform: available at https://www.iso.org/obp
89 — IEC Electropedia: available at http://www.electropedia.org/
90 3.1
91 rated tensile strength
92 RTS
93 estimate of the conductor breaking load calculated using the specified tensile properties of the components
94 wires
95 Note 1 to entry: See EN 50397-1:2006, 4.2.1.
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96 3.2
97 specified minimum failure load
98 SMFL
99 minimum load, specified by the purchaser or declared by the supplier, at which mechanical failure will not
100 take place
101 Note 1 to entry: From the probabilistic point of view, the specified minimum failure load corresponds to the value
102 having the probability of e % in the distribution function of the strength of the fitting. The exclusion limit e % is usually
103 taken within 2 % to 5 % with 10 % being the upper limit (see IEC 60826).
104 3.3
105 slippage factor
106 X-value
107 ratio between the tensile force on the covering of the conductor when a certain slippage starts to occur and
108 the RTS of the conductor
109 Note 1 to entry: See EN 50397-1:2006, Annex D.
110 Note 2 to entry: An X-value of e.g. 100 % means that at a force up to RTS no relative slippage between the covering
111 and the conductor occurs.
112 4 Covered conductors
113 4.1 Recommendations for selection of covered conductors
114 4.1.1 General
115 Covered conductors specified in EN 50397-1 are equipped with a polymeric covering as protection against
116 accidental contact with grounded parts or other live covered conductors. Covered conductors are not touch
117 proof, so they shall to be treated as non-protected plain conductors with regard to protection against electric
118 shock.
119 The use of covered conductors is only permissible in air and mounted on suitable insulators, which are at
120 least specified for the rated voltage of the overhead line.
121 4.1.2 Power frequency range
122 Covered conductors are intended to be used in the power frequency range of 49 Hz to 61 Hz.
123 4.1.3 Current rating
124 Reference shall be made either to EN 50397-1:2006, Annex A, to EN 50182 or to the manufacturer's
125 specifications to obtain the current ratings of the selected conductor cross sections and the maximum
126 permissible conductor temperature for the covering material as given in EN 50397-1:2006, 4.2.3.
127 If covered conductors in accordance with EN 50397-1 are exposed to strong solar radiation or high
128 temperature ambient conditions, the current carrying capacity shall be reduced accordingly.
129 4.1.4 Operating conditions
130 In addition to the current ratings, due regard shall be given to:
131 a) the capability of the covered conductor to withstand the worst anticipated fault conditions of the system;
132 b) the earth loop impedance;
133 c) the operating characteristics of the connected equipment;
134 d) the voltage drop requirements for long distance conditions.
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135 In certain cases longitudinal watertight conductor constructions can be necessary to avoid corrosive effects
136 to the conductor and to obtain a sufficient life time of the overhead line system.
137 4.2 Recommendation for storage and transport
138 4.2.1 General
139 Suitable protection, appropriate to the choice of covered conductors and the installation conditions, shall
140 be provided against mechanical damage.
141 Covered conductors stored at temperatures which are below those recommended for installation shall not
142 be subject to any mechanical stress including shocks, impact, bending and torsion. It is recommended not
143 to store complete reels in conditions, where the maximum permissible conductor temperature as given in
144 EN 50397-1:2006, 4.2.3 is exceeded.
145 4.2.2 Sealing and drumming
146 4.2.2.1 Clearance and lagging
147 In general it is recommended to use lagging or other equivalent protection to avoid damage to the covered
148 conductor. If lagging is used the thickness shall be appropriate.
149 The distance between the outer layer of the covered conductor on the filled drum and the ground or lagging
150 shall be sufficient to avoid damage to the covered conductor. It is recommended to use a clearance of at
151 least 50 mm.
152 4.2.2.2 Barrel diameter
153 The barrel diameter of delivery drums shall not be smaller than 30 x D, where D is the outer diameter of
154 the covered conductor.
155 4.2.2.3 Sealing
156 The ends of covered conductors shall be sealed to prevent ingress of moisture during transport and storage.
157 The possibility of damage to moisture seals during transport and storage shall be borne in mind. Where
158 such damage may have occurred, the conductor end shall be inspected and the seal remade.
159 4.2.2.4 Handling
160 When handling drums, suitable precautions shall be taken to avoid damage to the covered conductor and
161 injury to people. Due regard shall be paid to the mass of the drum, the method and direction of rolling and
162 the method of lifting. Drums shall be stored only on even and solid ground.
163 4.2.2.5 Drum condition
164 Drums shall be regularly inspected during storage to assess their physical condition. Care shall b
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