SIST EN 50397-3:2010

SLOVENSKI STANDARD
01-maj-2010
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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 c.a. et ne dépassant pas 36 kV c.a. - Partie 3: Guide
d'emploi
Ta slovenski standard je istoveten z: EN 50397-3:2010
ICS:
29.060.20 Kabli Cables
29.240.20 Daljnovodi Power transmission and
distribution lines
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 50397-3
NORME EUROPÉENNE
February 2010
EUROPÄISCHE NORM
ICS 29.240.20
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 Kunststoffumhüllte Leiter und zugehörige
et accessoires associés pour des tensions Armaturen für Freileitungen
assignées supérieures à 1 kV c.a. mit Nennspannungen über 1 kV
et ne dépassant pas 36 kV c.a. - und nicht mehr als 36 kV
Partie 3: Guide d'emploi Wechselspannung -
Teil 3: Leitfaden für die Verwendung

This European Standard was approved by CENELEC on 2010-02-01. 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, 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, Romania,
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: Avenue Marnix 17, B - 1000 Brussels

© 2010 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
-
Ref. No. EN 50397-3:2010 E
Foreword
This European Standard was prepared by the Technical Committee CENELEC TC 20, Electric cables. It
was submitted to the formal vote and was approved by CENELEC as EN 50397-3 on 2010-02-01.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN and CENELEC shall not be held responsible for identifying any or all such patent
rights.
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) 2011-02-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2013-02-01

__________
- 3 - EN 50397-3:2010
Contents
Introduction .5
1 Scope .5
2 Normative references .5
3 Terms and definitions .6
4 Covered conductors .6
4.1 Recommendations for selection of covered conductors .6
4.2 Recommendation for storage and transport .7
4.3 Recommendation for installation of covered conductors . 11
4.4 Other recommendations . 13
5 Accessories . 14
5.1 General . 14
5.2 Joints . 14
5.3 Insulators . 14
5.4 Fittings . 14
5.5 Earthing devices . 17
5.6 Arc protection devices . 17
5.7 Surge arresters . 19
5.8 Bird protection . 19
5.9 Corona protection . 19
Bibliography . 20

Figures
Figure 1 – View from the top .8
Figure 2 - Keep the drum standing upright, using wedges in the heels of the flanges .8
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.9
Figure 5 - Drums may be lifted either by crane or fork-lift truck .9
Figure 6 - Rolling the drums . 10
Figure 7 - Recommended direction . 10
Figure 8 - Not recommended direction . 10
Figure 9 - Unwind this way . 12
Figure 10 - Never unwind this way . 12
Figure 11 - Example of a joint . 14
Figure 12 - Example of a tie . 15
Figure 13 - Example of a bolted tension clamp . 15
Figure 14 - Example of a helical fitting . 16
Figure 15 - Example of a wedge type tension clamp . 16
Figure 16 - Example of a tee off connection . 17
Figure 17 - Example for an earthing device . 17
Figure 18 - Arc phase to phase . 17
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

- 5 - EN 50397-3:2010
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.” is in 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.
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 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.
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.
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 a.c. and not exceeding 36 kV a.c. - Part 2: Accessories for covered conductors - Tests and
Acceptance criteria
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.

3.1
Rated Tensile Strength (RTS)
an estimate of the conductor breaking load calculated using the specified tensile properties of the
components wires (see EN 50397-1:2006, 4.2.1)
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 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)
the ratio between the tensile force on the covering of the conductor when a certain slippage starts to
occur and the RTS of the conductor (see EN 50397-1:2006, Annex D)
NOTE A 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 Curre
...