EN 50341-2-20:2015
(Main)Overhead electrical lines exceeding AC 1 kV - Part 2-20: National Normative Aspects (NNA) for ESTONIA (based on EN 50341-1:2012)
Overhead electrical lines exceeding AC 1 kV - Part 2-20: National Normative Aspects (NNA) for ESTONIA (based on EN 50341-1:2012)
1.1 General (NCPT) EE.1 Application to new lines This Part 2-20 applies to all new overhead electric lines with nominal system voltages exceeding AC 1 kV and with rated frequencies below 100 Hz. This standard also applies to D.C. overhead lines in structural aspects. (NCPT) EE.2 “New overhead line” A “new overhead line” means a completely new line between two points, A and B. A new branch line of the existing power line should be considered as a new power line including the junction support, for which specific requirements should be defined in the Project Specification. 1.2 Field of application (A-dev) EE.1 Application to mounting of telecommunication equipment The Standard EVS-EN 50341:2012 is applicable to fixing of structural elements for tele-communication (antennas, satellite dishes, All Dielectric Self Supporting (ADSS) equipment, etc.), if mounted on power line supports (towers), especially regarding wind forces and ice loads on such fixed elements. The design and installation should be done under the due control of the line owner and/or the competent authority. Mounting of telecommunication equipment on power line supports must be coordinated with line owner and stated in the Project Specification. If telecommunication equipment (antennas, dishes, etc.) will be installed in the transmission line supports, and their size, location or mounting will have major effects on the loads or design of the structures, the requirements of EVS-EN 1993-3 will also have to be taken into account. If such structures include conductive parts, the requirements on clearances in Section 5.8 should be applied. (NCPT) EE.2 Application to existing overhead lines The Standard EVS-EN 50341:2012 shall not be applied to maintenance, reconductoring, tee-offs, extensions or diversions to existing overhead lines in Estonia, unless specifically required in the Project Specification. In cases of major revisions of existing lines the degree of application of the Standard EVS-EN 50341:2012 should be agreed upon by the parties concerned and specified in the Project Specification. (NCPT) EE.3 Application to installations under construction or design Installations in the design and construction stage may be completed by using the standard valid at the beginning of planning unless otherwise agreed with the line owner and/or any other competent authority. It must also be determined in the Project Specification which previous National Standard and to what extent should be applied to the project in question.
Nadzemni električni vodi za izmenične napetosti nad 45 kV - 2-20. del: Nacionalna normativna določila (NNA) za Estonijo (na podlagi EN 50341-1:2012)
Ta standard velja za vse nove nadzemne električne vode z nazivno napetostjo omrežja, ki presega 1 kV pri izmeničnem toku, in z nazivnimi frekvencami pod 100 Hz. Ta standard velja tudi za strukturne vidike nadzemnih vodov z enosmernim tokom. Izraz »novi nadzemni vod« pomeni povsem nov vod med dvema točkama – A in B. Novi odcepni vod obstoječega električnega voda naj bi obravnavali kot nov električni vod, vključno s podporo za spoj, za katero naj bi določili specifične zahteve v projektni specifikaciji.
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Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 50341-2-20:2016
01-april-2016
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Overhead electrical lines exceeding AC 45 kV - Part 2-20: National Normative Aspects
(NNA) for ESTONIA (based on EN 50341-1:2012)
Ta slovenski standard je istoveten z: EN 50341-2-20:2015
ICS:
29.240.20 Daljnovodi Power transmission and
distribution lines
SIST EN 50341-2-20:2016 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN 50341-2-20:2016
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SIST EN 50341-2-20:2016
EUROPEAN STANDARD EN 50341-2-20
NORME EUROPÉENNE
EUROPÄISCHE NORM
February 2015
ICS 29.240.20
English Version
Overhead electrical lines exceeding AC 45 kV -
Part 2-20: National Normative Aspects (NNA) for ESTONIA
(based on EN 50341-1:2012)
This European Standard was approved by CENELEC on 2015-01-06.
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 50341-2-20:2015 E
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SIST EN 50341-2-20:2016
EN 50341-2-20:2015 2 / 42 Estonia
CONTENTS
0 Introduction .5
0.7 Language .5
1 Scope .5
1.1 General .5
1.2 Field of application .5
2 Normative references, definitions and symbols .6
2.1 Normative references.6
3 Basis of design .8
3.2 Requirements of overhead lines .8
3.3 Limit states .9
3.4 Actions .9
3.6 Design values .9
4 Actions on lines .9
4.1 Introduction .9
4.3 Wind loads .9
4.4 Wind forces on overhead line components . 10
4.5 Ice loads . 11
4.6 Combined wind and ice loads . 11
4.7 Temperature effects . 11
4.8 Security loads .
...
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