EN 50341-2-24:2024

SLOVENSKI STANDARD
01-september-2025
Nadomešča:
SIST EN 50341-2-24:2019
Nadzemni električni vodi za izmenične napetosti nad 1 kV - 2-24. del: Nacionalna
normativna določila (NNA) za Romunijo (na podlagi EN 50341-1:2012)
Overhead electrical lines exceeding AC 1 kV - Part 2-24: National Normative Aspects
(NNA) for Romania (based on EN 50341-1:2012)
Ta slovenski standard je istoveten z: EN 50341-2-24:2024
ICS:
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 50341-2-24

NORME EUROPÉENNE
EUROPÄISCHE NORM December 2024
ICS 29.240.20 Supersedes EN 50341-2-24:2019
English Version
Overhead electrical lines exceeding AC 1 kV - Part 2-24:
National Normative Aspects (NNA) for Romania (based on
EN 50341-1:2012)
This European Standard was approved by CENELEC on 2024-11-06. 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
© 2024 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 50341-2-24:2024 E
Romania – 1/95 – EN 50341-2-24:2024
Contents Page
European foreword . 3
0 Introduction. 4
0.7 Language . 4
1 Scope . 4
1.1 General . 4
1.2 Field of application. 4
2 Normative references, definitions and symbols . 4
2.1 Normative references . 4
2.2 Definitions . 10
2.3   Symbols . 17
3 Basis of design . 21
3.2 Requirements of overhead lines . 21
3.2.1 Basic requirements . 21
3.2.2 Reliability requirements . 21
3.2.5 Strength coordination . 21
3.2.6 Additional considerations . 21
4 Actions on lines . 21
4.1 Introduction . 21
4.3 Wind loads . 22
4.3.1 Field of application and basic wind velocity . 22
4.4 Wind forces on overhead line components . 24
4.4.1 Wind forces on conductors . 24
4.4.3 Wind forces on lattice towers . 25
4.4.3.2  Method 1 . 25
4.5 Ice loads . 25
4.5.1 General . 25
4.5.2 Ice forces on conductors . 26
4.6 Combined wind and ice loads . 27
4.6.1 Combined probabilities . 27
4.6.4 Equivalent diameter D of an ice-covered conductor . 30
4.6.5 Wind forces on support for ice-covered conductors . 30
4.6.6 Combination of wind velocities and ice loads . 32
4.9 Safety loads . 34
4.9.1 Construction and maintenance loads . 34
4.9.2 Loads related to the weight of linesmen . 36
4.10 Forces due to short-circuit currents . 36
4.11 Other special forces . 36
4.12   Load cases . 38
4.12.1  General . 38
4.12.2  Standard load cases . 39
5 Electrical requirements . 46
5.2 Currents . 46
5.2.1   Normal current . 46
5.2.2   Short-circuit current . 46
5.7 Coordination of conductor positions and electrical stresses . 46
5.8 Internal clearances within the span and at the top of support . 47
5.9 External clearances . 51
5.9.1  General . 51
6 Earthing systems . 54
6.1.3 Earthing measures against lightning effects . 55
7  Supports . 57
7.1  Initial design considerations . 57
7.2  Materials . 57
7.3 Lattice steel towers . 58

7.3.1 General . 58
7.3.5 Structural analysis . 58
7.3.6  Ultimate limit states . 60
7.3.6.1  General . 60
7.3.6.3  Tension, bending and compression resistance of members. 60
7.3.8     Resistance of connections . 60
7.4 Steel poles . 62
7.4.1 General . 62
7.4.6.2    Resistance of cross section areas . 62
7.9 Corrosion protection and finishes . 62
7.10 Maintenance facilities . 63
7.10.2 Maintainability . 63
7.10.3 Safety requirements . 63
8 Foundations . 63
8.2 Basis of geotechnical design (EN 1997-1-1:2004 – Section 2) . 63
8.2.1  General . 63
8.6  Interaction between support foundations and soil . 63
9 Conductors and earth-wires. 64
9.1 Introduction . 64
9.2 Conductors for overhead electrical lines . 64
9.2.1  Characteristics and dimensions . 64
9.2.3 Conductor service temperatures and grease characteristics . 67
9.3 Steel based conductors . 67
9.3.1 Characteristics and dimensions . 67
9.3.5 Corrosion protection . 67
9.6 General requirements . 67
9.6.1 Avoidance of damage . 67
9.6.2 Partial factor for conductors . 68
9.6.4    Sag - tension calculations . 68
Figure 9/RO.1 — The diagrams of recommended tensile forces (see CIGRE Brochure no. 273
[1]) 69
10 Insulators . 69
10.2 Standard electrical requirements . 69
10.4 Pollution performance requirements . 71
10.5 Power arc requirements . 72
10.7 Mechanical requirements . 72
10.16 Selection, delivery and installation of insulators . 72
11 Hardware . 74
11.4 Magnetic characteristics . 74
11.6 Mechanical requirements . 74
12 Quality assurance checks and taking-over . 74
Annex C (informative) Application examples of wind loads - Special forces . 75
C.1 Application examples for the calculation of wind loads  (additionally to SR EN
50341-1:2013) (ncpt)  RO.1 C.1.3 Example 3: Tension lattice tower for an overhead
electrical line of 400 kV . 75
Data and calculation step by step . 76
C.1.3.1 The input data: . 76
C.1.3,2 The mean wind velocity . 77
Mean velocity of extreme wind combined with nominal ice (hoar-frost) . 78
C.1.3.3 Wind pressure on conductors – Calculation factors . 78
Annex AA (informative) The swinging of suspension insulator sets . 91
Bibliography . 93

Romania – 3/95 – EN 50341-2-24:2024
European foreword
The following statements 1 to 6 are required from CLC/TC 11 for all NNAs; the statement 7 has been
added by the Romanian National Committee (NC).

1. The Romanian National Committee is identified by the following address:

Romanian Standards Association (Asociația de Standardizare din România - ASRO)
Standardization Department
Mihai Eminescu Street No 238, Sector 2, Cod 020085, Bucharest, Romania
Phone: +40 21 316 32 96
Fax: +40 21 316 08 70
email: asro@asro.ro
www.asro.ro
Name of the relevant technical body: Romanian Technical Committee no 165 “Overhead
power lines” (ASRO/CT 165 - Linii electrice aeriene)

2. The Romanian NC and its technical body (ASRO/CT 165 - Linii electrice aeriene) prepared
this Part 2-24 of EN 50341, listing the Romanian National Normative Aspects (NNA) under its
sole responsibility, and duly passed it through the CENELEC and CLC/TC 11 procedures.

NOTE The Romanian NC also takes sole responsibility for the technically correct co-ordination of this
assurance/control. However, it is noted that this quality control was made in the framework of the general
responsibility of a standards committee under the national laws/regulations.

3. This EN 50431-2-24, hereafter referred to as Part 2-24, is normative in Romania and
informative in other countries.

4. This Part 2-24 shall be read in conjunction with EN 50341-1, hereafter referred to as Part 1.
All clause numbers used in this NNA correspond to those of Part 1. Specific subclauses, which
are prefixed “RO”, shall be read as amendments to the relevant text in Part 1. Any necessary
clarification regarding the application of this NNA in conjunction with Part 1 shall be referred
to the Romanian NC who will, in co-operation with CLC/TC 11, clarify the requirements.

Where no reference is made in this NNA to a specific subclause, then Part 1 applies.

5. In case of “boxed values” defined in Part 1, amended values, (if any) which are defined in
Part 2-24 shall be taken into account in Romania.

However, any “boxed value”, whether in Part 1 or in this Part-2-24, shall not be amended in
the direction of greater risk in a Project Specification.

6. The National Romanian standards/regulations related to overhead electrical lines exceeding
1 kV AC are listed in 2.1 of this Part 2-24.

NOTE  All national standards referred to in this Part 2-24 will be replaced by the relevant European
Standards as soon as they become available and are declared by the Romanian NC to be applicable
and thus reported to the secretary of CLC/TC 11.

7. The subclauses 2.1/RO.1, 2.1/RO.2, 2.1/RO.2.1.1 and 2.1/RO.2.1.2 are “A-dev”.
The subclauses 4.3.1/RO.1, 4.5.1/RO.1 and 4.6.1/RO.1 are “snc”.
All other subclauses RO.X are “ncpt”.
This new edition reviews and
This second edition replaces the first edition published in 2019.
complements the previous one.
0 Introduction
0.7 Language
(ncpt) RO.1 Language
This standard EN 50341-2-24 (Part 2-24) is published in English and Romanian languages.

1 Scope
1.1 General
1.1 RO.1 General
(ncpt) This standard EN 50341-2-24 (Part 2-24) gives the requirements for design and construction
of overhead electrical lines with nominal voltages exceeding A.C. 1 kV operating at 50 Hz
frequency.
This Part 2-24 applies to new overhead electrical lines, as well as in the following cases:
– the extension of existing overhead electrical lines;
– the deviation of some portions of the existing overhead electrical lines in
accordance with the provisions of technical regulations in force issued by the
National Energy Regulatory Authority (see article 39 of ANRE Order 25/2016);
– new supports to be used for the replacement and/or relocation of existing
supports.
This Part 2-24 is not applicable for the existing overhead electrical lines unless specifically
required by Project Specification. The overhead electrical lines, that are in different stages of
design or construction, can be completed in conformity with the standards in force at the
beginning of project.
For the application of this standard for specific requirements relating to modernization,
increasing safety and transport capacity of existing overhead electrical lines, reference shall
be specified in the Project Specification. At the same time, the correlation between relevant
regulations and associated standards shall be established in the Project Specifications.
The extension of existing electrical lines is considered as new overhead electrical lines, except
the junction points that shall be detailed in the Project Specifications.
1.2 Field of application
1.2    RO.1 Overhead electrical lines having uninsulated, pre-insulated and insulated
conductors
(ncpt) This Part 2-24 is applicable for the design and construction of overhead electrical lines with
uninsulated, pre-insulated and insulated conductors where the internal and external
clearances can be smaller than those specified in Part 1 (SR EN 50341-1:2013).

2 Normative references, definitions and symbols
2.1 Normative references
2.1 RO.1 Application of normative references in Part 1
(A-dev) The normative references in Part 1 (SR EN 50341-1:2013) are applicable, unless otherwise
specified in this Part 2-24. Moreover, in Romania, the Eurocodes series adopted as national
standards shall be applied pursuant the technical regulations on construction field.

2.1 RO.2 References to national laws, technical regulations and standards
(A-dev) The following national acts and normative documents contain provisions for design,
construction and mounting of the overhead electrical lines. These normative acts (laws,
governmental decisions, decrees) and normative documents (national technical regulations
and standards) are mentioned in the text so that their content, in whole or in part, constitutes
requirements of this standard (Part 2-24).

Romania – 5/95 – EN 50341-2-24:2024
On the date of publication of this standard, the editions of the documents cited as normative
references are in force. For dated references, only the cited edition applies. For undated
references, the latest edition of the reference document (including amendments) applies.
Taking into consideration that any normative document can be subject to revision, the parties
involved in different agreements based on this standard shall investigate the possibility of
using the latest edition of referenced documents.

2.1 RO. 2.1.1 National normative acts and technical regulations
2.1 RO.2.1.1 National normative acts
(A-dev) The following normative acts are applicable:
Law on electricity and natural gas no. 123/2012 (with subsequent completions and
modifications);
Legea energiei electrice şi a gazelor naturale nr. 123/2012 (cu modificările şi completările
ulterioare)
Water Law no. 107/1996 (with subsequent completions and modifications);
Legea apelor nr 107/1996 (cu modificările şi completările ulterioare)
Law on the environmental protection no. 137/1995 (with subsequent completions and
modifications);
Legea protecției mediului nr. 137/1995 (cu modificările şi completările ulterioare)
Law no. 292/2018 on the environmental impact assessment of public and private projects
(with subsequent completions and modifications);
Legea nr. 292/2018 privind evaluarea impactului anumitor proiecte publice şi private asupra
mediului (cu modificările şi completările ulterioare)

Low no. 121/2019 on the assessment and management of ambient noise
(with subsequent completions and modifications);
Legea nr. 121/2019 privind evaluarea şi gestionarea zgomotului ambiant (cu modificările şi
completările ulterioare)
Law no. 440 of June 27, 2002 for the approval of Government Ordinance no. 95/1999
regarding the quality of assembly works for machinery, equipment and industrial
technological installations;
Legea nr. 440 din 27 iunie 2002 pentru aprobarea Ordonanței Guvernului nr. 95/1999
privind calitatea lucrărilor de montaj pentru utilaje, echipamente și instalații tehnologice
industriale
Decree no. 237/1978 for the establishment of normative documents concerning
systematization, location, construction, and repairing work of the overhead electrical lines
passing through forests and over agricultural lands;
Decretul nr. 237/1978 pentru stabilirea normativelor privind sistematizarea, amplasarea,
construirea și repararea liniilor electrice care trec prin păduri și prin terenuri agricole
Government Ordinance no. 43/1997 regarding the legal regime of roads (with
subsequent completions and modifications);
Ordonanţa Guvernului nr. 43/1997 privind regimul drumurilor (cu modificările şi completările
ulterioare)
Government Emergency Ordinance no. 195/2005 on the environmental protection (with
subsequent completions and modifications);
Ordonanța de urgență a Guvernului nr. 195/2005 privind protecția mediului (cu modificările
şi completările ulterioare)
2.1 RO.2.1.2   National technical regulations
(A-dev) The following technical regulations are applicable.
National Energy Regulatory Authority (ANRE) – Order no. 25/2016 on the approval of
methodology for the issuance of placement permit by the network operators (with
subsequent completions and modifications);
Autoritatea Naţională de Reglementare în domeniul Energiei (ANRE) – Ordinul nr. 25/2016 privind
aprobarea Metodologiei pentru emiterea avizelor de amplasament de către operatorii de reţea
(cu modificările şi completările ulterioare)

National Energy Regulatory Authority (ANRE) – Order no. 239/2019 on the approval of the
Technical Norm concerning the delimitation of the protection and safety areas related to the
energy capacities (with subsequent completions and modifications);
Autoritatea Naţională de Reglementare în domeniul Energiei (ANRE) – Ordinul nr. 239/2019
pentru aprobarea Normei tehnice privind delimitarea zonelor de protecţie şi de siguranţă aferente
capacităţilor energetice (cu modificările şi completările ulterioare)

Ministry of the Environment, Waters and Forests – Order no. 269/2020 on the approval of the
general guide applicable to the stages of the environmental impact assessment procedure, the
guide for environmental impact assessment in a cross-border context and other specific
guidelines for different fields and categories of projects;
Ministerul Mediului, Apelor şi Pădurilor – Ordinul nr. 269/2020 privind aprobarea ghidului general
aplicabil etapelor procedurii de evaluare a impactului asupra mediului, a ghidului pentru evaluarea
impactului asupra mediului în context transfrontieră şi a altor ghiduri specifice pentru diferite
domenii şi categorii de proiecte

Ministry of Development, Public Works and Administration – Order no. 30/2023 on the approval
of the technical Regulations for the production of concrete and the execution of concrete
works, reinforced concrete and prestressed concrete – Part 1: Concrete production, reference
number NE 012/1-2022;
Ministerul Dezvoltării, Lucrărilor Publice şi Administraţiei – Ordinul nr. 30/2023 pentru aprobarea
reglementării tehnice Normativ pentru producerea şi executarea lucrărilor din beton, beton armat
şi beton precomprimat Partea 1: Producerea betonului, indicativ NE 012/1-2022

Ministry of Public Health – Order no. 1193/2006 regarding the limitation of the exposure of the
general population to electromagnetic fields from 0 Hz to 300 GHz;
Ministerul Sănătăţii Publice – Ordinul nr. 1193/2006 pentru aprobarea Normelor privind limitarea
expunerii populaţiei generale la câmpuri electromagnetice de la 0 Hz la 300 GHz

Ministry of Transport, Construction and Tourism – Order no. 2231/2005 for the amendment and
completion of the annex to the Order of the Minister of Transport, Construction and Tourism
no. 176/2005 on the approval of the technical regulation Normative for the design, execution,
verification and operation of electrical installations in hazardous areas associated with explosive
atmospheres, reference number NP 099-04;
Ministerul Transporturilor, Construcţiilor şi Turismului – Ordinul nr. 2231/2005 pentru modificarea
și completarea anexei la Ordinul ministrului transporturilor, construcțiilor și turismului nr. 176/2005
privind aprobarea reglementării tehnice Normativ pentru proiectarea, executarea, verificarea și
exploatarea instalațiilor electrice în zone cu pericol de explozie, indicativ NP 099-04.

Romania – 7/95 – EN 50341-2-24:2024
2.1 RO.2.1.3  Romanian standards
ncpt) The following normative documents are Romanian standards and European / international
standards adopted as national standards.

Reference Title
SR 438-1:2012 Steel products for concrete reinforcement – Part 1: Hot rolled structural
steel – Grades and quality technical requirements; Produse de oţel pentru
armarea betonului – Partea 1: Oţel beton laminat la cald – Mărci şi condiţii
tehnice de calitate
SR 438-2:2012 Steel products for concrete reinforcement – Part 2: Cold drawn round wire;
Produse de oţel pentru armarea betonului – Partea 2: Sârmă rotundă trefilată

SR 438-3:2012 Steel products for reinforcement of concrete – Part 3: Welded fabric;
Produse de oţel pentru armarea betonului – Partea 3: Plase sudate

SR 832:2008 Influences of electrical installations of high voltage on the communication
networks – Prescriptions; Influenţe ale instalaţiilor electrice de înaltă tensiune
asupra liniilor de telecomunicaţii – Prescripţii

SR 2970:2005 Precast columns of reinforced and prestressed concrete for overhead
electrical lines – General technical requirements for quality; Stâlpi
prefabricați din beton armat și beton precomprimat pentru linii electrice
aeriene – Condiții tehnice generale de calitate

SR 6290:2004 Crossings between overhead transmission lines and telecommunication
lines; Încrucişări între liniile de energie electrică şi liniile de telecomunicaţii

SR CISPR TR 18-2 Radio interference characteristics of overhead power lines and high-voltage
equipment – Part 2: Methods of measurement and procedure for determining
limits; Caracteristici ale perturbațiilor de frecvență radio produse de liniile
electrice aeriene și echipamentele electrice de înaltă tensiune – Partea 2:
Metode de măsurare și procedură pentru determinarea valorilor limită

SR EN 1993-1-8 Eurocode 3: Design of steel structures – Part 1-8: Joints;
Eurocod 3: Proiectarea structurilor de oţel – Partea 1-8: Îmbinări

SR EN 10025-2 Hot rolled products of structural steels – Part 2: Technical delivery conditions
for non-alloy structural steels; Produse laminate la cald din oțeluri de
construcții – Partea 2: Condiții tehnice de livrare pentru oțeluri de construcții
nealiate
SR EN 10244-1 Steel wire and wire products – Non-ferrous metallic coatings on steel wire –
Part 1: General principles; Sârme şi produse trefilate de
oţel – Acoperiri metalice neferoase pe sârme de oţel – Partea 1: Principii
generale
SR EN 10244-2 Steel wire and wire products – Non-ferrous metallic coatings on steel wire –
Part 2: Zinc or zinc alloy coatings; Sârme și produse trefilate din oțel –
Acoperiri metalice neferoase pe sârmă de oțel – Partea 2: Acoperiri de zinc
sau aliaj de zinc
SR EN 50182 Conductors for overhead lines – Round wire concentric lay stranded
conductors; Conductoare pentru linii aeriene – Conductoare cu sârme
rotunde cablate în straturi concentrice

Reference Title
SR EN 50326 Conductors for overhead lines – Characteristics of greases;
Conductoare pentru linii aeriene – Caracteristici ale produselor de protecţie

SR EN 50522 Earthing of power installations exceeding 1 kV a.c.;
Legarea la pământ a instalaţiilor electrice cu tensiune alternativă mai mare
de1 kV
SR EN 60038 CENELEC standard voltages; Tensiuni standardizate de CENELEC

SR EN 61140 Protection against electric shock – Common aspects for installation and
equipment; Protecţie împotriva şocurilor electrice – Aspecte comune în
instalaţii şi echipamente electrice

SR EN 61467 Insulators for overhead lines – Insulator strings and sets for lines with a
nominal voltage greater than 1 000 V – AC power arc tests; Izolatoare pentru
linii aeriene – Lanţuri de izolatoare şi lanţuri de izolatoare echipate pentru linii
de tensiune nominală mai mare de 1 000 V – Încercări la arc de putere în
curent alternativ
SR EN 62110 Electric and magnetic field levels generated by AC power systems –
Measurement procedures with regard to public exposure;
Nivelurile câmpului electric şi magnetic generat de sistemele de alimentare
în curent alternativ – Procedurile de măsurare a nivelurilor de expunere a
publicului
SR EN IEC 60071-1 Insulation co-ordination – Part 1: Definitions, principles and rules;
Coordonarea izolaţiei – Partea 1: Definiţii, principii şi reguli

SR EN IEC 60071-2 Insulation co-ordination – Part 2: Application guidelines; Coordonarea
izolaţiei – Partea 2: Ghid de aplicare

SR EN IEC 61284 Overhead lines – Requirements and tests for fittings; Linii electrice aeriene –
Cerințe şi încercări pentru accesorii

SR EN IEC 61936-1 Power installations exceeding 1 kV AC and 1,5 kV DC – Part 1: AC; Instalaţii
electrice de tensiune alternativă mai mare de 1 kV și de tensiune continuă
mai mare de 1,5 kV – Partea 1: Curent electric (tensiune) alternativ(ă)

SR EN IEC 62641 Conductors for overhead lines – Aluminium and aluminium alloy wires for
concentric lay stranded conductors; Conductoare pentru linii electrice
aeriene – Sârme din aluminiu și din aliaj de aluminiu pentru conductoare
înfuniate în straturi concentrice

SR EN IEC 63248 Conductors for overhead lines – Coated or cladded metallic wire for
concentric lay stranded conductors; Conductoare pentru linii electrice
aeriene – Sârmă metalică acoperită sau învelită pentru conductoare înfuniate
în straturi concentrice
SR EN ISO 1461 Hot dip galvanized coatings on fabricated iron and steel articles –
Specifications and test methods; Acoperiri prin zincare termică pe produse
fabricate din fontă și oțel – Specificații și metode de încercare

Romania – 9/95 – EN 50341-2-24:2024
Reference Title
SR EN ISO 898-1 Mechanical properties of fasteners made of carbon steel and alloy steel –
Part 1: Bolts, screws and studs with specified property classes – Coarse
thread and fine pitch thread; Caracteristici mecanice ale elementelor de
asamblare executate din oţel carbon şi oţel aliat – Partea 1: Şuruburi parţial
şi complet filetate şi prezoane de clase de calitate specificate – Filete cu pas
grosolan şi filete cu pas fin
SR EN ISO 898-2 Fasteners – Mechanical properties of fasteners made of carbon steel and
alloy steel – Part 2: Nuts with specified property classes;
Caracteristici mecanice ale elementelor de asamblare executate din oţel
carbon şi oţel aliat – Partea 2: Piuliţe de clase de calitate specificate

SR EN ISO 9223 Corrosion of metals and alloys – Corrosivity of atmospheres – Classification,
determination and estimation; Coroziunea metalelor şi aliajelor – Corozivitatea
atmosferelor – Clasificare, determinare şi estimare

SR EN ISO 9224 Corrosion of metals and alloys – Corrosivity of atmospheres – Guiding
values for the corrosivity categories; Coroziunea metalelor şi
aliajelor – Corozivitatea atmosferelor – Valori de referinţă pentru clasele de
corozivitate
SR EN ISO 9225 Corrosion of metals and alloys – Corrosivity of atmospheres – Measurement
of environmental parameters affecting corrosivity of atmospheres;
Coroziunea metalelor şi aliajelor – Corozivitatea atmosferelor – Măsurarea
parametrilor de mediu care afectează corozivitatea atmosferelor

SR ISO 1996-1 Acoustics – Description, measurement and assessment of environmental
noise – Part 1: Basic quantities and assessment procedures; Acustică –
Descrierea, măsurarea și evaluarea zgomotului ambiant – Partea 1: Mărimi
fundamentale și metode de evaluare

SR ISO 1996-2 Acoustics – Description, measurement and assessment of environmental
noise – Part 2: Determination of sound pressure levels;
Acustică – Descrierea, măsurarea şi evaluarea zgomotului ambient

SR ISO 3864-1 Graphic symbols – Security signs and colours – Part 1: Design principles for
safety signs and safety marks; Simboluri grafice – Culori şi semne de
securitat – Partea 1: Principii de proiectare pentru semne de securitate şi
marcaje de securitate
SR ISO 9613-2 Acoustics – Attenuation of sound during propagation
outdoors – Part 2: General method of calculation; Acustică – Atenuarea
sunetului propagat în aer liber – Partea 2: Metodă generală de calcul

STAS 4068/1-82 Maximum water discharges and storage – Determination of maximum water
discharges and storage of watercourses; Debite şi volume maxime de apă –
Determinarea debitelor şi volumelor maxime ale cursurilor de apă

STAS 4068/2-87 Maximum water discharges and storages – Yearly probabilities of maximum
water discharges and storages under normal and special working conditions;
Debite şi volume maxime de apă – Probabilităţile anuale ale debitelor şi
volumelor maxime în condiţii normale şi speciale de exploatare

STAS 4273-83 Water constructional works – Integrating with importance classes;
Construcţii hidrotehnice – Încadrarea în clase de importanţă

2.2 Definitions
For the purpose of this standard, in addition to the terms and definitions given in SR EN 50341-
1:2013, the following terms and definitions apply.

2.2 RO.1
(ncpt)
overhead electrical line
overhead power line; overhead line (in a broad sense; OHL)

a system of electrical and supporting elements mounted above ground in still air, which is
composed by conductors, insulators (including fittings and clamps), earthing systems and
structural elements (the foundations and supports, either lattice towers or poles), and
monitoring installations and damping devices of the conductors’ vibrations and galloping,
etc. being used for the transmission and distribution of electrical energy

Note 1 to entry: The overhead electrical lines can be: single circuit lines, double circuit lines or multiple
circuit lines, from constructive point of view.

2.2 RO.1.1
(ncpt) (of an overhead electrical line)
route alignment
straight line portion of an overhead electrical line route, containing one or more spans where
the overhead electrical line maintains its direction (see Figure 2/RO.1)

2.2 RO.1.2
(ncpt)
section (of an overhead electrical line)
the sector of an overhead electrical line having one or more spans between two consecutive
tension supports (see Figure 2/RO.1)

Romania – 11/95 – EN 50341-2-24:2024

Key
The route alignments are straight line portions on the route of an overhead electrical line, which are located
-
between the supports 1 and 3 or between the supports 3 and 9;
supports 1, 3 and 9 can be the angle tension supports or the angle suspension supports.
- The The support
6 can be an intermediate (tangent) tension support or (tangent) suspension support;
- Stringing sections are the portions of an overhead electrical line which are located between two tension
supports;
- L – nominal span;
e
- L – actual spans;
i (i=1…n)
- L – wind span;
v
- – weight span
Lw ;
- – virtual span
Lh ;
- hi (i=1…n) – difference in levels;
– maximum conductor sag corresponding to the nominal span;
- fn
- – the conductor attachment height to the clamp;
hcl
- – minimum ground
hg  clearance;
- – the angle between two consecutive alignments of an overhead electrical line route;
2α
- θ – the angle of line direction change is the supplementary angle to the angle 2α.

Figure 2/RO.1 — Graphic representation for the alignment of line route,
section, spans and difference in levels

Key
- L – nominal span;
e
- fn – maximum conductor sag corresponding to nominal span;
- h – the conductor attachment height to the clamp;
cl
- hg – minimum ground clearance;

Figure 2/RO.2 — Graphic representation for nominal span, maximum conductor sag
corresponding to the nominal span, and minimum ground clearance

2.2 RO.1.3
(ncpt)
approval of the emplacement (line route)

a written response given by the system operator to the request of an applicant regarding
the location of an objective in relation to an energy capacity, and where the operator’s point
of view related to the proposed objective emplacement is specified

2.2 RO.1.4
(ncpt) right-of-way for an overhead electrical line

land area located along the overhead electrical line and the airspace above it, where are
imposed restrictions in terms of overhead line coexistence with natural elements, objects,
buildings and their related facilities; the right-of-way includes the protection area and safety
area
2.2 RO.1.5
(ncpt)
operating corridor of an overhead electrical line

land strip non-arranged located along the line route between the existing permanent
access roads towards zone, allowing pedestrian access for the operating personnel

2.2 RO.1.6
(ncpt)
working corridor of an overhead electrical line

land strip which can be temporary occupied, and usually located along the overhead
electrical line axis and included between the erection work platforms, being needed for
the installation of conductors, the access of machinery and transport of mounting
materials
2.2 RO.1.7
(ncpt)
crossing and under-crossing
those crossings where the overhead electrical line over-cross or respectively under-cross
an object
Romania – 13/95 – EN 50341-2-24:2024
2.2 RO.1.8
(ncpt)
crossing of an overhead electrical line with an objective (object)
that situation where at least one of the conductors of overhead electrical line, in normal or
deviated position, in the load case consisting of maximum wind perpendicular to the
direction of the overhead electrical line, in horizontal projection, it intersects with an
objective (for example: railways, roads, overhead electrical lines, lighting poles,
telecommunication lines, pipelines, fences, buildings, bridges, waterways, sports terrains,
enclosures, car parks, land improvement facilities, irrigation facilities, photovoltaic
systems, wind turbines, etc.)
2.2 RO.1.9
(ncpt)
overhead electrical line proximity to an objective (object)
that situation where the objective (object) is located inside of the right-of-way of an
overhead electrical line (as defined in 5.9.1.2), and the horizontal projection is outside, at
the maximum deviation of the extreme conductors of overhead electrical line assuming the
load case for maximum wind acting perpendicularly to the overhead electrical line

2.2 RO.1.10
...