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BS EN IEC 61936-2:2023

BS EN IEC 61936-2:2023

$198.66

Power installations exceeding 1 kV AC and 1,5 kV DC – DC

Published By Publication Date Number of Pages
BSI 2023 54
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PDF Pages PDF Title
2 undefined
5 Annex ZA (normative)Normative references to international publicationswith their corresponding European publications
7 English
CONTENTS
11 FOREWORD
14 INTRODUCTION
15 1 Scope
16 2 Normative references
17 3 Terms, definitions, symbols and abbreviated terms
3.1 Terms and definitions
19 3.2 Symbols and abbreviated terms
4 Fundamental requirements
4.1 General
4.1.1 General requirements
Figures
Figure 1 – Simplified example of a VSC scheme layout showingdemarcation of scope of this document with IEC 61936-1
20 Figure 2 – Simplified example of a LCC bipole scheme layout showingdemarcation of scope of this document with IEC 61936-1
21 4.1.2 Agreements between supplier and user
Tables
Table 1 – References to subclauses where agreement betweensupplier and user is required
22 4.2 Electrical requirements
4.2.1 Methods of DC neutral point earthing
23 Figure 3 – DC neutral point earthing for various DC configurations
24 4.2.2 Voltage classification
4.2.3 Current in normal operation
4.2.4 Short-circuit current
4.2.5 Rated frequency
25 4.2.6 Corona
4.2.7 Electric and magnetic fields
4.2.8 Overvoltages
4.2.9 Harmonics
26 4.2.10 Electromagnetic compatibility
4.2.11 Radio interference
27 4.3 Mechanical requirements
4.4 Climatic and environmental conditions
4.4.1 General
28 4.4.2 Normal conditions
29 4.4.3 Special conditions
30 4.5 Particular requirements
4.5.1 Effects of small animals and micro-organisms
4.5.2 Noise level
31 4.5.3 Transport
5 Insulation
5.1 General
5.2 Selection of insulation level
5.2.1 General
5.2.2 Consideration of methods of neutral earthing
5.2.3 Consideration of rated withstand voltages for AC and specified withstand voltages for DC
5.3 Verification of withstand values
32 5.4 Minimum clearances of live parts
5.5 Minimum clearances between parts under special conditions
5.6 Tested connection zones
33 6 Electrical Equipment
6.1 General requirements
6.2 Specific requirements
6.2.1 Switching devices
6.2.2 Power transformers and reactors
6.2.3 Prefabricated type-tested switchgear
6.2.4 Instrument transformers
34 6.2.5 Surge arresters
6.2.6 Capacitors
6.2.7 Line traps
6.2.8 Insulators
6.2.9 Insulated cables
6.2.10 Conductors and accessories
6.2.11 Rotating electrical machines
6.2.12 Generating units
6.2.13 Generating unit main connections
35 6.2.14 Static converters
6.2.15 Fuses
6.2.16 Electrical and mechanical interlocking
6.2.17 Resistors
6.2.18 Cooling system
7 DC Installations
7.1 General
7.1.1 Common requirements
36 7.1.2 Circuit arrangement
7.1.3 Documentation
7.1.4 Transport routes
7.1.5 Aisles and access areas
7.1.6 Lighting
7.1.7 Operational safety
7.1.8 Labelling
7.2 Outdoor DC installations of open design
7.2.1 General
37 7.2.2 Protective barrier clearances
7.2.3 Protective obstacle clearances
7.2.4 Boundary clearances
7.2.5 Minimum height over access area
38 7.2.6 Clearances to buildings
39 7.2.7 External fences or walls and access doors
7.3 Indoor DC installations of open design
7.4 Installation of prefabricated type-tested switchgear
Figure 4 – Approaches with buildings (within closed electrical operating areas)
40 7.5 Requirements for buildings
7.5.1 General
7.5.2 Structural provisions
7.5.3 Rooms for switchgear
7.5.4 Maintenance and operating areas
41 7.5.5 Doors
7.5.6 Draining of insulating liquids
7.5.7 Heating, ventilation and air conditioning (HVAC)
7.5.8 Buildings which require special consideration
7.6 High voltage/low voltage prefabricated substations
7.7 Electrical installations on mast, pole and tower
42 8 Safety measures
8.1 General
8.2 Protection against direct contact
8.2.1 General
8.2.2 Measures for protection against direct contact
8.2.3 Protection requirements
8.3 Means to protect persons in case of indirect contact
8.4 Means to protect persons working on or near electrical installations
43 8.5 Protection from danger resulting from arc fault
8.6 Protection against direct lightning strokes
8.7 Protection against fire
8.8 Protection against leakage of insulating liquid and SF6
8.9 Identification and marking
9 Protection, automation and auxiliary systems
9.1 Protection systems
9.2 Automation systems
9.3 Auxiliary systems
9.4 Basic rules for electromagnetic compatibility of control systems
44 10 Earthing systems
10.1 General
10.2 Fundamental requirements
10.2.1 Safety criteria
45 10.2.2 Functional requirements
10.2.3 High and low voltage earthing systems
Figure 5 – Touch voltage limit DC
46 10.3 Design of earthing systems
10.3.1 General
10.3.2 Power system faults
10.3.3 Lightning and transient overvoltages
47 10.4 Construction of earthing systems
10.5 Measurements
10.6 Maintainability
10.6.1 Inspections
10.6.2 Measurements
11 Inspection and testing
11.1 General
11.2 Verification of specified performances
11.3 Tests during installation and commissioning
11.4 Trial running
12 Operation and maintenance manual
48 Annex A (informative)Example of typical DC voltages with possible insulation levelsand corresponding air clearances
49 Table A.1 – Typical DC voltages and switching / lightning impulse withstand voltage
50 Table A.2 – Correlation between presumed rated switching impulseWithstand voltages and minimum phase-to-earth air clearances
Table A.3 – Correlation between presumed rated lightning impulse withstand voltages and minimum phase-to-earth clearances
51 Annex B (normative)Method of calculating the voltage limit
52 Bibliography

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