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BS EN 50341-2-21:2023

BS EN 50341-2-21:2023

$198.66

Overhead electrical lines exceeding AC 1 kV. National Normative Aspects (NNA) for Slovenia (based on EN 50341-1:2012)

Published By Publication Date Number of Pages
BSI 2023 58
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PDF Catalog

PDF Pages PDF Title
2 undefined
7 European foreword
8 1.1 General
1.2 Field of application
2.1 Normative references
10 2.2 Definitions
2.3 Symbols
3. Basis of design
3.2 Requirements of overhead lines
3.2.2 Reliability requirements
11 3.3 Limit states
3.3.1 General
4. Actions on lines
4.1 Introduction
4.2 Permanent loads
4.3 Wind loads
4.3.1 Field of application and basic wind velocity
12 4.3.2 Mean wind velocity
13 4.3.3 Mean wind pressure
4.3.4 Turbulence intensity and peak wind pressure
4.4 Wind forces on overhead line components
4.4.1 Wind forces on conductors
14 4.4.2 Wind loads on insulator sets
4.4.3 Wind forces on lattice towers
15 4.4.4 Wind forces on poles
4.5 Ice loads
4.5.1 General
16 4.5.2 Ice forces on conductors
4.6 Combined wind and ice loads
4.6.1 Combined probabilities
17 4.6.2 Drag factors and ice densities
4.6.3 Mean wind pressure and peak wind pressure
4.6.6 Combination of wind velocities and ice loads
4.7 Temperature effects
4.8 Security loads
4.8.1 General
4.9 Safety loads
18 4.9.1 Construction and maintenance loads
4.11 Other special forces
4.11.1 Avalanches, creeping snow
4.11.2 Earthquakes
4.12 Load cases
4.12.1 General
19 4.12.2 Standard load cases
21 4.13 Partial factors for actions
23 5. Electrical requirements
5.2 Currents
5.2.1 Normal current
5.3 Insulation co-ordination
24 5.4 Classification of voltages and overvoltages
5.4.2 Representative power frequency voltages
5.4.5 Representative fast-front overvoltages
25 5.5 Minimum air clearance to avoid flashover
26 5.6 Load cases for calculation of clearances
5.6.2 Maximum conductor temperature
5.6.3 Wind loads for determination of electric clearances
27 C T2 square of the conversion factor, C T2=0,58.
5.6.4 Ice loads for determination of electric clearances
5.6.5 Combined wind and ice loads
28 5.8 Internal clearances within the span and at the top of support
29 5.9 External clearances
5.9.1 General
30 5.9.2 External clearances to ground in areas remote from buildings, roads, etc.
31 5.9.3 External clearances to residential and other buildings
32 5.9.5 External clearances to adjacent traffic routes
33 5.9.6 External clearances to other power lines or overhead telecommunication lines
34 5.9.7 External clearances to recreational areas (playgrounds, sports areas, etc.)
5.10 Corona effect
5.10.1 Radio noise
35 5.10.2 Audible noise
5.11 Electric and magnetic fields
5.11.1 Electric and magnetic fields under overhead line
5.11.2 Electric and magnetic field induction
5.11.3 Interference with telecommunications circuits
6 Earthing systems
6.1 Introduction
6.1.3 Earthing measures against lighting effects
37 6.1.4 Transferred potentials
6.3 Dimensioning with regard to thermal strength
6.3.2 Current rating calculation
6.4 Dimensioning with regard to human safety
6.4.2 Touch voltage limits at different locations
38 6.5 Site inspection and documentation of earthing systems
7 Supports
7.1 Initial design considerations
7.2 Materials
7.2.1 Steel materials, bolts, nuts and washers, welding consumables
(ncpt) SI.1 Materials for steel components
39 7.3 Lattice steel towers
7.3.1 General
7.3.5 Structural analysis
7.3.6 Ultimate limit states
7.3.8 Resistance of connections
40 7.4 Steel poles
7.4.1 General
7.4.7 Serviceability limit states (EN 1993-1-1:2005 – Chapter 7)
41 7.4.8 Resistance of connections
7.5 Wood poles
7.5.5 Ultimate limit states
42 7.5.7 Resistance of connections
7.6 Concrete poles
7.9 Corrosion protection and finishes
7.9.1 General
7.10 Maintenance facilities
7.10.1 Climbing
43 7.10.2 Maintainability
44 8 Foundations
8.1 Introduction
8.2 Basis of geotechnical design (EN 1997-1:2004, chapter 2)
8.2.2 Geotechnical design by calculation
46 9 Conductors and earth-wires
9.2 Aluminium based conductors
9.2.1 Characteristics and dimensions
9.2.3 Conductors service temperatures and grease characteristics
47 9.3 Steel based conductors
9.6 General requirements
48 10 Insulators
10.2 Standard electrical requirements
10.7 Mechanical requirements
49 11.5 Short circuit current and power arc requirements
50 11.6 Mechanical requirements
52 Annex G(normative)Calculation methods for earthing systems
53 Annex J(normative)Angles in lattice steel towers
54 Annex M(informative)Geotechnical and structural design of foundations

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BS EN 50341-2-21:2023
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