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BS EN 50341-2-22:2022

BS EN 50341-2-22:2022

$198.66

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

Published By Publication Date Number of Pages
BSI 2022 64
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PDF Catalog

PDF Pages PDF Title
2 undefined
11 1 Scope
1.1 General
1.2 Field of application
2 Normative references, definitions and symbols
2.1 Normative references
13 2.2 Definitions
16 3 Basis of design
3.2 Requirements of overhead lines
3.2.2 Reliability requirements
17 3.2.3 Security requirements
3.2.8 Durability
3.6 Design values
3.6.2 Design value of an action
4 Actions on lines
4.3 Wind loads
4.3.1 Field of application and basic wind velocity
19 4.3.2 Mean wind velocity
4.3.3 Mean wind pressure
4.3.5 Wind forces on any overhead line component
20 4.4 Wind forces on overhead line components
4.4.1 Wind forces on conductors
4.4.1.1 General
4.4.1.2 Structural factor
4.4.1.3 Drag factor
4.4.2 Wind forces on insulator sets
4.4.3 Wind forces on lattice towers
4.4.3.1 General
21 4.4.3.2 Method 1
4.4.4 Wind forces on poles
4.5 Ice loads
4.5.1 General
23 4.5.2 Ice forces on conductors
4.6 Combined wind and ice loads
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
4.6.6.1 Extreme ice load IT combined with a high probability wind velocity VIH
24 4.6.6.2 Nominal ice load I3 combined with low probability wind velocity VIL
4.7 Temperature effects
4.8 Security loads
4.8.1 General
4.9 Safety loads
4.9.2 Loads related to the weight of the linesman
4.10 Forces due to short-circuit currents
4.12 Load cases
4.12.1 General
25 4.12.2 Standard load cases
27 4.13 Partial factors for actions
5 Electrical requirements
5.3 Insulation co – ordination
28 5.5 Minimum air clearance distances to avoid flashover
5.6 Load cases for calculation of clearances
5.6.2 Maximum conductor temperature
29 5.6.3 Wind loads for determination of electric clearances
5.6.3.2 Nominal wind loads for determination of internal and external clearances
5.6.3.3 Extreme wind loads for determination of internal clearances
5.6.4 Ice loads for determination of electric clearances
5.6.5 Combined wind and ice loads
5.8 Internal clearances within the span and at the top of support
36 5.9 External clearances
5.9.1 General
38 5.9.2 External clearances to ground in areas remote from buildings, roads, etc.
40 5.9.3 External clearances to residential and other buildings
42 5.9.4 External clearances to line crossing traffic routes
44 5.9.5 External clearances to adjacent traffic routes
45 5.9.6 External clearances to other power lines or overhead telecommunication lines
47 5.9.7 External clearances to recreational areas (playgrounds, sport areas, etc.)
6 Earthing systems
6.1 Introduction
6.1.1 Purpose
6.1.3 Earthing measures against lightning effects
48 6.2 Ratings with regard to corrosion and mechanical strength
6.2.2 Earthing and bonding conductors
6.4 Dimensioning with regard to human safety
6.4.3 Basic design of earthing systems with regard to permissible touch voltage
7 Supports
7.3 Lattice steel towers
7.3.1 General
7.3.5 Structural analysis
49 7.3.6 Ultimate limit states
7.3.6.1 General
7.3.6.3 Tension, bending and compression resistance of members
7.3.6.4 Buckling resistance of members in compression
7.3.7 Serviceability limit states
50 7.3.8 Resistance of connections
7.3.9 Design assisted by testing
7.4 Steel poles
7.4.1 General
7.4.5 Structural analysis (EN 1993-1-1:2005 – Chapter 5)
7.4.6 Ultimate limit states (EN 1993-1-1:2005 – Chapter 6)
7.4.6.1 General
7.4.7 Serviceability limit states (EN 1993-1-1:2005 – Chapter 7)
51 7.4.8 Resistance of connections
7.4.8.2 Bolts (other than holding-down bolts)
7.4.9 Design assisted by testing
7.5 Wood poles
7.5.1 General
7.5.5 Ultimate limit states
7.5.5.3 Resistance of wood elements
7.6 Concrete poles
7.6.1 General
7.6.3 Materials
52 7.6.4 Ultimate limit states
7.6.5 Serviceability limit states
7.10 Maintenance facilities
7.10.3 Safety requirements
7.11 Loading tests
7.12 Assembly and erection
53 8 Foundations
8.1 Introduction
8.2 Basis of geotechnical design (EN 1997-1:2004 – Section 2)
8.2.2 Geotechnical design by calculation
54 8.2.4 Load tests and tests on experimental models
8.3 Soil investigation and geotechnical data (EN 1997-1:2004 – Section 3)
55 8.4 Supervision of construction, monitoring and maintenance (EN 1997-1:2004 – Section 4)
56 9 Conductors and earth-wires
9.2 Aluminium based conductors
9.2.3 Conductor service temperatures and grease characteristics
9.3 Steel based conductors
9.3.3 Conductor service temperatures and grease characteristics
57 9.5 Conductors and ground wires containing optical fibre telecommunication circuits
9.5.3 Conductor service temperatures
9.6 General requirements
9.6.2 Partial factor for conductors
58 10 Insulators
10.4 Pollution performance requirements
10.5 Power arc requirements
59 10.7 Mechanical requirements
11 Hardware
11.6 Mechanical requirements
12 Quality assurance, checks and taking-over
60 Annex J (normative) Angles in lattice steel towers
J.2 General
J.3 Tension resistance of angles connected through one leg (see 7.3.6.2)
61 Annex K (normative) Steel poles
K.2 Classification of cross sections (EN 1993-1-1:2005 – 5.5)
K.4 Resistance of circular cross sections
62 Annex M (informative) Geotechnical and structural design of foundations
M.2 Sample analytical models for uplift resistance calculation
M.2.2 Calculation of RW

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