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  • BSI
    BS EN 50341-2-20:2015 Overhead electrical lines exceeding AC 45 kV - National Normative Aspects (NNA) for ESTONIA (based on EN 50341-1:2012)
    Edition: 2015
    $473.45
    / user per year

Description of BS EN 50341-2-20:2015 2015

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 telecommunication (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.


Standard NumberBS EN 50341-2-20:2015
TitleOverhead electrical lines exceeding AC 45 kV - National Normative Aspects (NNA) for ESTONIA (based on EN 50341-1:2012)
StatusWithdrawn
Publication Date2015-05-31
Withdrawn Date2019-01-25
ReplacesBS EN 50341-3:2001, BS EN 50423-3:2005
Replaced ByBS EN 50341-2-20:2018
Identical National Standard OfEN 50341-2-20:2015
DescriptorsAlternating current, High-voltage equipment, Loading, Overhead power lines, Electric power distribution lines, Electric power systems, Electric power transmission lines, Power cables, Estonia, Overhead line conductors, Overhead contact lines, Electrical equipment, Electric cables, Alternating-current power transmission, Structural design, Electric power transmission
ICS29.240.20 Power transmission and distribution lines
CommitteePEL/11
ISBN978 0 580 89873 0
PublisherBSI
Pages46

About BSI

BSI Group, also known as the British Standards Institution is the national standards body of the United Kingdom. BSI produces technical standards on a wide range of products and services and also supplies certification and standards-related services to businesses.
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