EN 50341-2-19:2015

Overhead electrical lines exceeding AC 1 kV - Part 2-19: National Normative Aspects (NNA) for CZECH REPUBLIC (based on EN 50341-1:2012)

1.1 General (ncpt) CZ.1 New overhead line The new overhead line is considered a brand new electric overhead line with nominal voltage exceeding 1 kV AC, between the points A and B. The new branch line of the existing overhead line shall be considered a new overhead line except for a junction support for which the specific requirements shall be defined in the Project Specification. The extent of application of this standard in respect of reconstruction, relaying and extension of existing overhead lines shall be determined in the Project Specification. Simultaneously, the Project Specification shall determine, which of the previous national standards shall be used and to what extent they shall be used for the project in question. 1.2 Field of application (ncpt) CZ.1 Field of application The requirements of this standard shall be adopted, where applicable (e.g. requirements on loads, external clearances, etc.), for telecommunication cables as well. In case of overhead line under the design stage, parties concerned shall agree the extent of the application of this standard. Overhead line under construction may be completed according to standards valid during the design stage of the line. The parties concerned shall agree any possible application of certain clauses of this standard. (ncpt) CZ.2 Installation of telecommunication equipment on supports Provisions of this standard also apply to the telecommunication equipment and devices (aerials, dish antennas, etc.) which are installed on individual supports of overhead power lines, especially in terms of wind and ice loads on such installed equipment. Design and installation has to respect requirements of the utility operating the line in question. The design of such telecommunication equipment has to incorporate such technical solutions and such precautions, which shall allow safe access and maintenance of both a power line and telecommunication equipment, and which shall provide protection of persons performing repairs or maintenance of the power line and/or telecommunication equipment against electric shock and protection of telecommunication equipment and attached installations against the influence of the power line (short-circuits, switching and lightning overvoltages etc.).

Nadzemni električni vodi za izmenične napetosti nad 1 kV - 2-19. del: Nacionalna normativna določila (NNA) za Češko republiko (na podlagi EN 50341-1:2012)

1.1 Splošno
(ncpt) CZ.1 Novi nadzemni vod
Novi nadzemni vod se obravnava kot povsem nov nadzemni električni vod z nazivno napetostjo, ki presega 1 kV pri izmeničnem toku med točko A in B.
Novi odcepni vod obstoječega nadzemnega voda je treba obravnavati kot nov nadzemni vod, z izjemo podpore za spoj, za katero je treba v projektni specifikaciji določiti specifične zahteve.
Obseg uporabe tega standarda glede obnavljanja, ponovnega polaganja in podaljševanja obstoječih nadzemnih vodov je treba določiti v projektni specifikaciji. Poleg tega je v projektni specifikaciji treba določiti, katere od prejšnjih nacionalnih standardov je treba uporabljati in v kolikšnem obsegu jih je treba uporabljati za zadevni projekt.
1.2 Področje uporabe
(ncpt) CZ.1 Področje uporabe   
Zahteve tega standarda je treba sprejeti, kjer je to primerno (npr. zahteve za obremenitve, zunanje razdalje itd.), tudi za telekomunikacijske kable.
V primeru nadzemnega voda, ki je v fazi načrtovanja, se morajo zadevne stranke dogovoriti o obsegu uporabe tega standarda.
Nadzemni vod v fazi izgradnje je lahko dokončan v skladu s standardi, ki veljajo med fazo načrtovanja voda. Zadevne stranke se morajo dogovoriti o kakršni koli možni uporabi določenih točk tega standarda.
(ncpt) CZ.2 Montaža telekomunikacijske opreme na podpore   
Določila tega standarda veljajo tudi za telekomunikacijsko opremo in naprave (antene, antenski krožniki itd.), ki so montirane na posamezne podpore nadzemnih električnih vodov, zlasti glede obremenitev vetra in ledu na tako montirani opremi. Pri obliki in montaži je treba upoštevati zahteve omrežja, na katerega je priključen zadevni vod. Oblika takšne telekomunikacijske opreme mora vključevati tehnične rešitve in previdnostne ukrepe, ki omogočajo varen dostop do električnega voda in telekomunikacijske opreme in njihovo vzdrževanje ter omogočajo zaščito pred električnim udarom za osebe, ki izvajajo popravila ali vzdrževanje električnega voda in/ali telekomunikacijske opreme, ter zaščito telekomunikacijske opreme in pritrjenih elementov pred vplivi električnega voda (kratki stiki, stikalne in atmosferske prenapetosti itd.).

General Information

• Status: Published
• Publication Date: 23-Apr-2015
• Withdrawal Date: 06-Apr-2018
• ICS: 29.240.20 - Power transmission and distribution lines
• Technical Committee: CLC/TC 11 - Overhead electrical lines exceeding 1 kV a.c. (1,5 kV d.c.)
• Drafting Committee: CLC/TC 11 - Overhead electrical lines exceeding 1 kV a.c. (1,5 kV d.c.)
• Current Stage: 6060 - Document made available - Publishing
• Start Date: 24-Apr-2015
• Completion Date: 24-Apr-2015
• Ref Project: SIST EN 50341-2-19:2016 - Overhead electrical lines exceeding AC 1 kV - Part 2-19: National Normative Aspects (NNA) for CZECH REPUBLIC (based on EN 50341-1:2012)

Standards Content (Sample)

SLOVENSKI STANDARD
01-april-2016
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Overhead electrical lines exceeding AC 1 kV - Part 2-19: National Normative Aspects
(NNA) for CZECH REPUBLIC (based on EN 50341-1:2012)
Ta slovenski standard je istoveten z: EN 50341-2-19:2015
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 50341-2-19

NORME EUROPÉENNE
EUROPÄISCHE NORM
April 2015
ICS 29.240.20
English Version
Overhead electrical lines exceeding AC 1 kV - Part 2-19:
National Normative Aspects (NNA) for CZECH REPUBLIC
(based on EN 50341-1:2012)
This European Standard was approved by CENELEC on 2015-04-07.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2015 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 50341-2-19:2015 E
Contents
Page
1 Scope . 7
1.1 General . 7
1.2 Field of application . 7
2 Normative references, definitions and symbols . 7
2.1 Normative references . 7
2.2 Definitions . 10
2.3 Symbols . 10
3 Basis of design . 12
3.2.2 Reliability requirements . 12
3.2.5 Strength coordination . 12
3.2.6 Additional considerations . 12
4 Actions on lines . 13
4.3 Wind loads . 13
4.3.1 Field of application and basic wind velocity . 13
4.3.2 Mean wind velocity . 13
4.3.3 Mean wind pressure . 13
4.4 Wind forces on overhead line components . 13
4.4.1 Wind forces on conductors . 13
4.4.2 Wind forces on insulator sets . 14
4.4.3 Wind forces on lattice towers . 15
4.4.4 Wind forces on poles . 15
4.5 Ice loads. 15
4.5.1 General . 15
4.6 Combined wind and ice loads . 16
4.6.1 Combined probabilities . 16
4.6.2 Drag factors and ice densities . 17
4.6.5 Wind forces on support for ice covered conductors . 17
4.6.6 Combination of wind velocities and ice loads . 17
4.7 Temperature effects . 18
4.8 Security loads . 18
4.8.1 General . 18
4.8.2 Torsional loads. 18
4.8.3 Longitudinal loads . 19
4.9 Safety loads . 19
4.9.1 Construction and maintenance loads . 19
4.9.2 Loads related to the weight of linesmen . 19
4.10 Forces due to short-circuit currents . 19
4.11 Other special forces . 20
4.11.1 Avalanches, creeping snow . 20
4.11.2 Earthquakes . 20
4.12 Load cases. 20
4.12.1 General . 20
4.12.2 Standard load cases . 20
4.13 Partial factors for actions . 22
5 Electrical requirements . 25
5.3 Insulation coordination . 25
5.4 Classification of voltages and overvoltages . 25
5.4.2 Representative power frequency voltages . 25
5.5 Minimum air clearance distances to avoid flashover . 26

Czech Republic - 3/63 - EN 50341-2-19:2015
5.5.2 Application of the theoretical method in Annex E . 26
5.5.3 Empirical method based on European experience . 26
5.6 Load cases for calculation of clearances . 27
5.6.2 Maximum conductor temperature . 27
5.6.3 Wind loads for determination of electric clearances . 27
5.6.4 Ice loads for determination of electric clearances . 28
5.6.5 Combined wind and ice loads . 29
5.7 Coordination of conductor positions and electrical stresses . 30
5.8 Internal clearances within the span and at the top of support . 30
5.9 External clearances . 33
5.9.1 General . 33
5.9.2 External clearances to ground in areas remote from buildings, roads, etc. . 34
5.9.3 External clearances to residential and other buildings . 34
5.9.4 External clearances to crossing traffic routes . 36
5.9.5 External clearances to adjacent traffic routes . 38
5.9.6 External clearances to other power lines or overhead telecommunication lines . 38
5.10 Corona effect . 40
5.10.1 Radio noise . 40
5.11 Electric and magnetic fields . 40
5.11.1 Electric and magnetic fields under a line . 40
5.11.2 Electric and magnetic field induction . 40
5.11.3 Interference with telecommunication circuits . 40
6 Earthing systems . 41
6.1 Introduction . 41
6.1.2 Requirements for dimensioning of earthing systems . 41
6.1.3 Earthing measures against lightning effects . 41
6.1.4 Transferred potentials . 42
6.2 Ratings with regard to corrosion and mechanical strength . 43
6.2.1 Earth electrodes. 43
6.2.2 Earthing and bonding conductors . 43
6.4 Dimensioning with regard to human safety . 43
6.4.1 Permissible values for touch voltages . 43
6.4.3 Basic design of earthing systems with regard to permissible touch voltage . 43
7 Supports . 44
7.3 Lattice steel towers . 44
7.3.6 Ultimate limit states. 44
7.3.7 Serviceability limit states . 44
7.3.8 Resistance of connections . 44
7.3.9 Design assisted by testing . 44
7.4 Steel poles . 45
7.4.6 Ultimate limit states (EN 1993-1-1:2005 – Chapter 6). 45
7.4.7 Serviceability limit states (EN 1993-1-1:2005 – Chapter 7) . 45
7.4.8 Resistance of connections . 45
7.4.9 Design assisted by testing . 45
7.5 Wood poles . 45
7.5.5 Ultimate l
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