EN 50423-3:2005
(Main)Overhead electrical lines exceeding AC 1 kV up to and including AC 45 kV - Part 3: Set of National Normative Aspects
Overhead electrical lines exceeding AC 1 kV up to and including AC 45 kV - Part 3: Set of National Normative Aspects
Notes 1, 2 and 3 are normative in Austria: NOTE 2 The construction of lines with covered conductors (KUF) and reduced internal or external clearance is permitted in Austria. NOTE 4 This NNA applies to overhead lines with nominal voltage exceeding AC 1kV up to and including AC 45 kV and a maximum operating voltage of 52 kV according to ÖVE EN 60071-1. Hereinafter the latter will be described as high voltage overhead lines, group I.
Freileitungen über AC 1 kV bis einschließlich AC 45 kV - Teil 3: Nationale Normative Festlegungen
Lignes électriques aériennes dépassant 1 kV AC jusqu'à 45 kV AC - Partie 3: Aspects Normatifs Nationaux
Nadzemni električni vodi za izmenične napetosti nad 1 kV in do vključno 45 kV – 3. del Zbirka nacionalnih normativnih določil
General Information
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Standards Content (Sample)
SLOVENSKI SIST EN 50423-3:2005
STANDARD
julij 2005
Nadzemni električni vodi za izmenične napetosti nad 1 kV in do vključno 45 kV
– 3. del Zbirka nacionalnih normativnih določil
Overhead electrical lines exceeding AC 1 kV up to and including AC 45 kV – Part 3:
Set of National Normative Aspects
ICS 29.240.20 Referenčna številka
© Standard je založil in izdal Slovenski inštitut za standardizacijo. Razmnoževanje ali kopiranje celote ali delov tega dokumenta ni dovoljeno
EUROPEAN STANDARD EN 50423-3
NORME EUROPÉENNE
EUROPÄISCHE NORM January 2005
ICS 29.240.20
English version
Overhead electrical lines exceeding
AC 1 kV up to and including AC 45 kV
Part 3: Set of National Normative Aspects
Lignes électriques aériennes Freileitungen über AC 1 kV
dépassant 1 kV AC jusqu'à 45 kV AC bis einschließlich AC 45 kV
Partie 3: Aspects Normatifs Nationaux Teil 3: Nationale Normative Festlegungen
This European Standard was approved by CENELEC on 2004-10-01. 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 one official version (English). 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, Cyprus, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden,
Switzerland and United Kingdom.
CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
Central Secretariat: rue de Stassart 35, B - 1050 Brussels
© 2005 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 50423-3:2005 E
Foreword
The different parts of this European Standard were prepared by the respective CENELEC National
Committees in cooperation with the Technical Committee CENELEC TC 11, Overhead electrical lines
exceeding 1 kV a.c. (1,5 kV d.c.).
The texts of the drafts were submitted to the Unique Acceptance Procedure and were approved by
CENELEC as EN 50423-3 on 2004-10-01.
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) 2005-10-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2007-10-01
__________
Text of EN 50423-3
Please see the subparts specific to each National Committee.
NOTE This Part 3 of EN 50423 is published by CENELEC in English only.
National Normative Aspects (NNA)
for
AUSTRIA
based on EN 50423-1:2005
EN 50423-3-1:2005 - 2/39 - Austria
Contents
1 General scope – Field of application . 4
2 Definitions, symbols and references …………………………………………. 4
2.1 Definitions . 4
2.3 References . 5
4 Actions on lines . 6
4.3.2 Wind loads . 6
4.3.3 Ice loads . 6
4.3.6 Construction and maintenance loads . 7
4.3.10.4 Standard load cases . 7
4.3.11 Partial factors for actions . 12
5 Electrical requirements . 13
5.4 Internal and external clearances . 13
5.4.2.1 General considerations and underlying principles .…. 13
5.4.3 Clearances within the span and at the tower . 17
5.4.4 Clearances to ground in areas remote from buildings, roads,
railways and navigable waterways . 18
5.4.5.2 Clearances to residential and other buildings . 19
5.4.5.3 Clearances to Line near roads, railways, navigable waterways . 21
5.4.5.4 Clearances to other power lines or overhead telecom. lines . 29
5.4.5.5 Clearances to recreational areas . 32
6 Earthing systems . 33
6.3 Construction of earthing systems . 33
6.3.1 Installation of earthing electrodes . 33
8 Foundations ………. 33
8.2 General requirements .…. 33
8.5.2.1 Geotechnical design by calculation, General . 34
8.5.3 Geotechnical design by prescriptive measures . 34
9 Conductors and overhead earthwires (ground wires) with or without
telecommunication circuits . 35
9.1 Introduction .………………………… 35
9.5.6 Test requirements …………………………………. 35
9.6 General requirements . 37
10 Insulators .…. 37
10.1 General .……………………………. 37
10.7 Mechanical requirements . 37
10.10 Characteristics and dimensions of insulators . 37
In addition to the given NNA, the following applies for Austria: . 38
TELECOMMUNICATION LINES CARRIED ON OVERHEAD TRANSMISSION LINES
Austria - 3/39 - EN 50423-3-1:2005
Foreword
1. The Austrian National Committee (NC) is identified by the following address:
Austrian Electrotechnical Committee
Österreichischer Verband für Elektrotechnik (OVE)
Eschenbachgasse 9, A-1010 Vienna, Austria
Phone no. +43.1.587.63.73
Fax no. +43.1.586.74.08
name/number of relevant subcommittee: Fach(normen)ausschuss L
2. The Austrian NC has prepared this Part 3-1 of EN 50423 listing the Austrian national
normative aspects, under its sole responsibility, and duly passed it through the CENELEC
and CLC/TC 11 procedures.
3. This EN 50423-3-1 is normative in Austria and informative for other countries;
4. This EN 50423-3-1 has to be read in conjunction with EN 50423-1, hereinafter referred to
as Part 1. All clause numbers used in this Part 3-1 correspond to those of Part 1. Specific
subclauses, which are prefixed „AT“, are to be read as amendments to the relevant text in
Part 1. Any necessary clarification regarding the application of Part 3-1 in conjunction
with Part 1 shall be referred to the Austrian NC who will, in cooperation with CLC/TC 11
clarify the requirements.
When no reference is made in Part 3-1 to a specific subclause, then Part 1 applies.
5. In the case of „boxed values“ defined in Part 1, amended values (if any) which are defined
in Part 3-1 shall be taken into account in Austria.
However any boxed value, whether in Part 1 or Part 3-1, shall not be amended in the
direction of greater risk in a Project Specification.
6. The Austrian NC declares in accordance with subclause 3.1 of Part 1 that this Part 3-1
follows the „Empirical Approach“ (subclause 4.3), and that consequently subclause 4.2
„General Approach“ is not applicable for Austria.
7. The national Austrian standards/regulations related to overhead electrical lines exceeding
1 kV (A.C.) are identified/listed in 2.3.
NOTE All national standards referred to in this Part 3-1 will be replaced by the relevant European Standards
as soon as they become available and are declared by the Austrian NC to be applicable and thus reported to
the secretary of CLC/TC 11.
EN 50423-3-1:2005 - 4/39 - Austria
Clause National regulation
1 General scope – Field of application
(A-dev) AT.1 Notes 1, 2 and 3 are normative in Austria:
NOTE 2 The construction of lines with covered conductors (KUF) and reduced internal or external
clearance is permitted in Austria.
NOTE 4 This NNA applies to overhead lines with nominal voltage exceeding AC 1kV up to and including
AC 45 kV and a maximum operating voltage of 52 kV according to ÖVE EN 60071-1. Hereinafter the latter
will be described as high voltage overhead lines, group I.
2 Definitions, symbols and references
2.1 Definitions
(A-dev) AT.2.(1)
a conductor crosses an object when, as a result of being deflected by wind blowing in
the direction of that facility, the outline of the conductor intersects the outline of the
object
(A-dev) AT.2.(2) crossing span
a span to which the conditions of AT.2.(1) apply
(A-dev) AT.3
In addition to the definition in Part 1:
Conductors
are understood to mean bare, insulated, or sheathed wires and cables suspended
between the supports of an overhead high-tension power transmission line – regardless
of whether they are energized or not. Included here are lines having multiple functions
(composite cables for conductors and earthwires). OPCON and OPGW are to be
considered as conductors.
Covered conductors (KUF) are not shock-proof, i.e. covered conductors being valid with
regard to prodection of contact as bare conductors. For the minimum requirements of
the design of covered conductors see ÖVE/ÖNORM E 8227
(A-dev) AT.11
line groups
are defined as follows in Table 2.1/AT.11
Table 2.1/AT.11 - Line groups
Line Nominal Maximum Operating Proof Alternating Normal Surge
Group Insulation Voltage, Effective Voltage A (Alternating Level (Surge
(series) Value in kV Voltage Holding Holding Voltage)
Voltage) Peak Value
Effective Value in kV in kV
I till 45kV till 52 till 105 till 250
Austria - 5/39 - EN 50423-3-1:2005
Clause National regulation
(ncpt) AT.30
wooden poles
pylon with a wooden tower body
2.3 References
(A-dev) AT.21 ÖVE-L 1, Construction of overhead power lines up to 1000V
(A-dev) AT.22 ÖNORM B 4007 Scarffoldind – general – use, construction und load
(A-dev) AT.23 ÖNORM B 4700 Reinforced concrete structures – EUROCODE-orientated
analysis, design and detailing
(A-dev) AT.24 ÖVE/ÖNORM E 8227 Covered conductors
(A-dev) AT.25 ÖNORM E 4101 Electrical overhead-lines; Pin insulators type VHD und VHD-G
(A-dev) AT.26 ÖNORM E 4102 Electrical overhead-lines; solid core post insulators VKSt und
VKS
(A-dev) AT.27 ÖVE-EH 41 Earthing in alternating current systems with nominal voltages
exceeding 1 kV
(A-dev) AT.28 ÖVE-L 5, Teil 1 Commissioning report for overhead lines
(A-dev) AT.29 ÖNORM ENV 1994-1-1 Eurocode 4: Design of composite steel and concrete
structures – Part 1-1: General rules and rules for buildings
(A-dev) AT.30 ÖNORM B 4710_1 Concrete – Part 1: Specification, production, use and
verification of conformity
EN 50423-3-1:2005 - 6/39 - Austria
Clause National regulation
4 Actions on lines
4.3.2 Wind loads
(ncpt) AT.3 :
Table 4.3.2/AT.3 Specific wind pressure acting upon the directly affected
components
Values relate to a wind velocity of 120 km/h and a thrust of 700 N/m
Component Specific C . q Reduction
x 120
aerodyn. drag N/m2 factor
coefficient C
x
full flat surfaces 1,6 1112 1
flat lattice walls made of angle profiles 1,4 973 1
made of rods 1,1 765 1
Timber poles, steel poles, concrete poles of 0,7 487 1
circular or near-circular shape
steel poles and concrete poles of hexagonal 1,0 695 1
or octagonal shape
Double poles of in the pole-plane 0,7 487 1
Timber, steel rectangular to pole-plane 0,8 556 1
1)
resp. concrete where e < d
m
wires and d < 15,8 mm 1,15 600 0,75
conductors of
Circular or d > 15,8 mm 1,0 521 0,75
elliptical shape
Aircraft warning and radar sphere d < 1,0 m 0,4 278 1
1)
e . inner distance pole to pole
dm .means diameter of pole
(snc) AT.10: In special cases it may be necessary to assume a greater wind velocity than
indicated in Table 4.3.2/AT.3 (120 km/h).
4.3.3 Ice loads
(A-dev) AT.2: Normal and exceptional additional loads on conductors are to be selected with a
view to the prevailing climatic conditions; the minimum assumptions are:
Normal additional load: (4 + 0,2 x d) in N/m
(d = conductor diameter in mm)
Exceptional additional load 25
Austria - 7/39 - EN 50423-3-1:2005
Clause National regulation
(snc) AT.3: For towers and equipment the following loading conditions apply:
For Normal additional loads:
(1) Conductor: Normal additional load
(2) Insulator strings of glass or porcelain: minimum 20% of their self weight (for
strings of composite insulators eventually higher percentages are to be
considered.)
(3) Tower body: no additional load
(4) Crossarms made of steel profiles: minimum 40% of their self weight
(5) Crossarms made of other materials: minimum 120 N/m2 acting on total surface
4.3.6 Construction and maintenance loads
(ncpt) AT.1: Construction lo
...
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