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BS EN IEC 62271-202:2022:2023 Edition

BS EN IEC 62271-202:2022:2023 Edition

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High-voltage switchgear and controlgear – AC prefabricated substations for rated voltages above 1 kV and up to and including 52 kV

Published By Publication Date Number of Pages
BSI 2023 126
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PDF Pages PDF Title
2 undefined
6 Annex ZA (normative)Normative references to international publicationswith their corresponding European publications
9 English
CONTENTS
16 FOREWORD
18 INTRODUCTION
19 1 Scope
20 2 Normative references
22 3 Terms and definitions
3.1 General terms and definitions
3.2 Assemblies of switchgear and controlgear
3.3 Parts of assemblies
23 3.4 Switching devices
24 3.5 Parts of switchgear and controlgear
3.6 Operational characteristics of switchgear and controlgear
25 3.7 Characteristic quantities
3.8 Index of definitions
4 Normal and special service conditions
4.1 Normal service conditions
4.1.1 General
26 4.1.2 Indoor switchgear and controlgear
4.1.3 Outdoor switchgear and controlgear
4.1.101 Low-voltage switchgear and controlgear
4.1.102 Power transformer
27 4.2 Special service conditions
4.2.1 General
4.2.2 Altitude
4.2.3 Exposure to pollution
28 4.2.4 Temperature and humidity
4.2.5 Exposure to abnormal vibrations, shock or tilting
4.2.6 Wind speed
4.2.7 Other parameters
5 Ratings
5.1 General
29 5.2 Rated voltage (Ur)
5.3 Rated insulation level (Ud, Up, Us)
30 5.4 Rated frequency (fr)
5.5 Rated continuous current (Ir)
5.6 Rated short-time withstand current (Ik)
5.6.101 Rated short-time withstand current of high-voltage switchgear and controlgear and high-voltage interconnection (Ik)
31 5.6.102 Rated short-time phase to earth withstand current (Ike)
5.6.103 Rated short-time withstand currents of low-voltage switchgear and controlgear and low-voltage interconnection (Icw)
5.7 Rated peak withstand current (Ip)
5.7.101 Rated peak phase to earth withstand current (Ipe)
5.7.102 Rated peak withstand currents of low-voltage switchgear and controlgear and low-voltage interconnection (Ipk)
5.8 Rated duration of short-circuit (tk)
32 5.8.101 Rated duration of short-circuit (tk)
5.8.102 Rated duration of phase to earth short-circuit (tke)
5.8.103 Rated duration of short-circuits for low-voltage switchgear and controlgear and low-voltage interconnection
5.8.104 Rated duration of short-circuits for power transformers
5.9 Rated supply voltage of auxiliary and control circuits (Ua)
5.10 Rated supply frequency of auxiliary and control circuits
5.11 Rated pressure of compressed gas supply for controlled pressure systems
5.101 Rated power of prefabricated substation and class of enclosure
5.101.1 Rated power of the prefabricated substation
33 5.101.2 Rated class of enclosure
5.102 Ratings of the internal arc classification (IAC)
5.102.1 General
5.102.2 Types of accessibility (A, B, AB)
34 5.102.3 Rated arc fault currents (IA, IAe)
5.102.4 Rated arc fault duration (tA, tAe)
6 Design and construction
35 6.1 Requirements for liquids in switchgear and controlgear
6.2 Requirements for gases in switchgear and controlgear
6.3 Earthing of switchgear and controlgear
36 6.4 Auxiliary and control equipment and circuits
6.4.1 General
6.4.2 Protection against electric shock
37 6.4.3 Components installed in enclosures
6.5 Dependent power operation
6.6 Stored energy operation
38 6.7 Independent unlatched operation (independent manual or power operation)
6.8 Manually operated actuators
6.9 Operation of releases
6.10 Pressure/level indication
6.11 Nameplates
6.12 Locking devices
6.13 Position indication
6.14 Degrees of protection provided by enclosures
39 6.15 Creepage distances for outdoor insulators
6.16 Gas and vacuum tightness
6.17 Tightness for liquid systems
6.18 Fire hazard (flammability)
6.19 Electromagnetic compatibility (EMC)
6.20 X-ray emission
6.21 Corrosion
6.22 Filling levels for insulation, switching and/or operation
40 6.101 Protection of the prefabricated substation against mechanical stress
6.102 Protection of the environment due to internal defects
41 6.103 Internal arc fault
6.104 Enclosure
6.104.1 General
42 6.104.2 Fire behaviour
Table 1 ā€“ Synthetic material characteristics
43 6.104.3 Environmental considerations
6.104.4 Covers and doors
44 6.104.5 Ventilation openings
6.104.6 Partitions
6.105 Other provisions
6.105.1 Provisions for dielectric tests on cables
6.105.2 Accessories
45 6.105.3 Operation aisle
6.105.4 Labels
6.105.5 Provisions for on-site assembly of prefabricated substation
6.106 Sound emission
6.107 Electromagnetic fields
6.108 Solar radiation
46 7 Type tests
7.1 General
7.1.1 Basics
47 7.1.2 Information for identification of test objects
7.1.3 Information to be included in type-test reports
7.2 Dielectric tests
7.2.1 General
Table 2 ā€“ Type tests
48 7.2.2 Ambient air conditions during tests
7.2.3 Wet test procedure
7.2.4 Arrangement of the equipment
7.2.5 Criteria to pass the test
7.2.6 Application of the test voltage and test conditions
7.2.7 Tests of switchgear and controlgear of Ur ā‰¤ 245 kV
7.2.8 Tests of switchgear and controlgear of Ur > 245 kV
7.2.9 Artificial pollution tests for outdoor insulators
7.2.10 Partial discharge tests
7.2.11 Dielectric tests on auxiliary and control circuits
49 7.2.12 Voltage test as condition check
7.2.101 Tests on the high-voltage components
50 7.2.102 Tests on low-voltage interconnection
51 7.3 Radio interference voltage (RIV) test
7.4 Resistance measurement
7.4.1 Measurement of the resistance of auxiliary contacts class 1 and class 2
7.4.2 Measurement of the resistance of auxiliary contacts class 3
7.4.3 Electrical continuity of earthed metallic parts test
52 7.4.4 Resistance measurement of contacts and connections in the main circuit as a condition check
7.5 Continuous current tests
7.5.101 General
53 7.5.102 Test conditions
Figure 1 ā€“ Measurement of power transformer temperature rise in ambient air: āˆ†t1
Figure 2 ā€“ Measurement of power transformer temperature rise in an enclosure: āˆ†t2
54 7.5.103 Test methods
55 Figure 3 ā€“ Diagram of the preferred continuous current test method
56 Figure 4 ā€“ Diagram of the continuous current test alternative method
57 Figure 5 ā€“ Diagram for open-circuit test
58 7.5.104 Measurements
60 7.5.105 Acceptance criteria
Figure 6 ā€“ Example of air temperature measurement locationsinside a non-walk-in type prefabricated substation
61 7.5.106 Continuous current test under solar radiation
7.6 Short-time withstand current and peak withstand current tests
62 7.7 Verification of the protection
7.8 Tightness tests
7.9 Electromagnetic compatibility tests (EMC)
7.10 Additional tests on auxiliary and control circuits
7.10.1 General
7.10.2 Functional tests
63 7.10.3 Verification of the operational characteristics of auxiliary contacts
7.10.4 Environmental tests
7.10.5 Dielectric test
7.11 X-radiation test for vacuum interrupters
7.101 Calculations and mechanical tests
7.101.1 Wind pressure
7.101.2 Roof loads
7.101.3 Mechanical impacts
7.101.4 Handling
64 7.102 Internal arc test
7.102.1 General
7.102.2 Test conditions
65 7.102.3 Arrangement of the equipment
7.102.4 Test procedure
7.102.5 Criteria to pass the test
67 7.102.6 Test report
7.102.7 Transferability of tests results
68 7.103 Measurement or calculation of electromagnetic fields
8 Routine tests
8.1 General
8.2 Dielectric test on the main circuit
8.3 Test on auxiliary and control circuits
8.3.1 Inspection of auxiliary and control circuits, and verification of conformity to the circuit diagrams and wiring diagrams
8.3.2 Functional tests
8.3.3 Verification of protection against electric shock
69 8.3.4 Dielectric tests
8.4 Measurement of the resistance of the main circuit
8.5 Tightness test
8.6 Design and visual checks
8.101 Other functional tests
8.102 Tests after assembly on site
9 Guide to the selection of switchgear and controlgear (informative)
9.101 General
70 9.102 Selection of rated values
9.103 Selection of class of enclosure
71 9.104 Internal arc fault
9.104.1 General
9.104.2 Causes and preventive measures
9.104.3 Supplementary protective measures
72 Table 3 ā€“ Locations, causes and examples of measures decreasingthe probability of internal arcs
73 9.104.4 Considerations for the selection and installation
9.104.5 IAC classification
74 9.105 Summary of technical requirements and ratings
Table 4 ā€“ Single phase-to-earth arc fault current dependingon the network neutral earthing
75 Table 5 ā€“ Summary of technical requirements, characteristicsand ratings relevant for prefabricated substations
80 10 Information to be given with enquiries, tenders and orders (informative)
10.1 General
10.2 Information with enquiries and orders
81 10.3 Information with tenders
11 Transport, storage, installation, operating instructions and maintenance
11.1 General
82 11.2 Conditions during transport, storage and installation
11.3 Installation
11.3.1 General
11.3.2 Unpacking and lifting
11.3.3 Assembly
11.3.4 Mounting
83 11.3.5 Connections
11.3.6 Information about gas and gas mixtures for controlled and closed pressure systems
11.3.7 Final installation inspection
11.3.8 Basic input data by the user
11.3.9 Basic input data by the manufacturer
11.4 Operating instructions
11.5 Maintenance
84 12 Safety
12.101 General
12.102 Electrical aspects
12.103 Mechanical aspects
12.104 Thermal aspects
12.105 Internal arc aspects
13 Influence of the product on the environment
85 Annex A (normative)Internal arc fault ā€“ Method to verify the internal arc classification (IAC)
A.1 General
A.2 Room simulation
A.3 Indicators (for assessing the thermal effects of the gases)
A.3.1 General
86 Figure A.1 ā€“ Mounting frame for vertical indicators
Figure A.2 ā€“ Horizontal indicators
87 A.3.2 Arrangement of indicators
93 A.4 Tolerances for geometrical dimensions of test arrangements
A.5 Test parameters
Figure A.3 ā€“ Arrangement of indicators
94 A.6 Test procedure
Figure A.4 ā€“ Selection of tests on high-voltage switchgearand controlgear for class IAC-A
95 Figure A.5 ā€“ Selection of tests on high-voltage switchgearand controlgear for class IAC-B
96 Figure A.6 ā€“ Selection of tests on high-voltage interconnections for class IAC-A
97 Figure A.7 ā€“ Selection of tests on high-voltage interconnections for class IAC-B
99 Annex B (normative)Test to verify the sound level of a high-voltage/low-voltagetransformer prefabricated substation
B.1 Purpose
B.2 Test object
B.3 Test method
B.4 Measurements
B.5 Presentation and calculation of the results
101 Annex C (normative)Mechanical impact test
C.1 Test for the verification of the resistance to mechanical impact
C.2 Apparatus for the verification of the protection against mechanical damage
102 Figure C.1 ā€“ Impact test apparatus
103 Annex D (informative)Rating of power transformers in an enclosure
D.1 General
D.2 Mineral-oil-immersed power transformer
104 D.3 Dry-type power transformer
Figure D.1 ā€“ Mineral-oil-immersed power transformer load factor inside of the enclosure related to ambient air at the location and top-oil and winding temperature rise limits
Figure D.2 ā€“ Dry-type power transformer load factor outside of the enclosure
105 Figure D.3 ā€“ Insulation class 105 Ā°C (A) dry-type powertransformers load factor in an enclosure
106 Figure D.4 ā€“ Insulation class 120 Ā°C (E) dry-type powertransformers load factor in an enclosure
Figure D.5 ā€“ Insulation class 130 Ā°C (B) dry-type powertransformers load factor in an enclosure
107 Figure D.6 ā€“ Insulation class 155 Ā°C (F) dry-type powertransformers load factor in an enclosure
Figure D.7 ā€“ Insulation class 180 Ā°C (H) dry-type powertransformers load factor in an enclosure
108 D.4 Example
Figure D.8 ā€“ Insulation class 200 Ā°C (H) dry-type powertransformers load factor in an enclosure
Figure D.9 ā€“ Insulation class 220 Ā°C (H) dry-type powertransformers load factor in an enclosure
111 Annex E (informative)Examples of earthing arrangements
Figure E.1 ā€“ Example of earthing arrangement
112 Figure E.2 ā€“ Example of earthing arrangement
113 Figure E.3 ā€“ Example with the framework serving as part of the main earthing conductor
114 Annex F (informative)Characteristics of enclosure materials
F.1 Metals
F.1.1 Coatings
F.1.2 Paints
F.2 Concrete
Table F.1 ā€“ Treatment of coatings
Table F.2 ā€“ Tests of coatings
115 Table F.3 ā€“ Test of concrete
116 Annex G (informative)Evaluation of the impact of solar radiation ā€“Simulated solar radiation continuous current test
G.1 General
G.2 Test method
G.2.1 General
G.2.2 Test parameters, equipment and preparation
117 Figure G.1 ā€“ Indicative arrangement of laboratory radiation sources (e.g. radiant heat lamps) for continuous current test with simulated solar radiation
118 G.2.3 Test procedure and application of test currents
G.2.4 Measurements
119 G.3 Evaluation of the solar radiation effects
G.3.1 Evaluation of solar radiation effects on the temperature rise of power transformer
G.3.2 Evaluation of solar radiation effects on the temperature rise of components other than the power transformer
G.4 Application considerations
121 Annex H (informative)Installation conditions of electronic equipment
H.1 General
H.2 Accessibility
122 H.3 Application of air temperature measurements inside the prefabricated substation
123 Bibliography

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