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BS EN IEC 62271-202:2022 – TC

BS EN IEC 62271-202:2022 – TC

$280.87

Tracked Changes. 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 2022 312
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This part of IEC 62271 specifies the service conditions, rated characteristics, general structural requirements and test methods of enclosed high-voltage prefabricated substations. These prefabricated substations are cable-connected to AC high-voltage networks with an operating voltage up to and including 52 kV and power frequencies up to and including 60 Hz. They can be manually operated from inside (walk-in type) or from outside (non-walk-in type). They are designed for outdoor installation at locations with public accessibility and where protection of personnel is provided. These prefabricated substations can be situated at ground level or partially or completely below ground level. The last are also called “underground prefabricated substations”. In general, two types of prefabricated substations are considered in this document: – high-voltage switchgear prefabricated substations; – high-voltage/low-voltage transformer prefabricated substations (step-up and step-down). A high-voltage switchgear prefabricated substation comprises an enclosure containing in general the following electrical components: – high-voltage switchgear and controlgear; – auxiliary equipment and circuits. A high-voltage/low-voltage transformer prefabricated substation comprises an enclosure containing in general the following electrical components: – power transformer(s); – high-voltage and low-voltage switchgear and controlgear; – high-voltage and low-voltage interconnections; – auxiliary equipment and circuits. However, relevant provisions of this document are applicable to designs where not all these electrical components exist (for example, a prefabricated substation consisting of power transformer and low-voltage switchgear and controlgear). The listed electrical components of a high-voltage/low-voltage transformer prefabricated substation can be incorporated in the prefabricated substation either as separate components or as an assembly type CEADS according to IEC 62271-212. This document covers only designs using natural ventilation. However, relevant provisions of this document are applicable to designs using other means of ventilation except the rated power of the prefabricated substation and associated class of enclosure (see 5.101), the continuous current tests (see 7.5) and all temperature rise related requirements, which would need an agreement between manufacturer and user. NOTE 1 IEC 61936-1 [1]1 provides general rules for the design and erection of high-voltage power installations. As well, it specifies additional requirements for the external connections, erection and operation at the place of installation of high-voltage prefabricated substations compliant with IEC 62271-202, which are regarded as a component of such installation. Non-prefabricated high-voltage substations, are generally covered by IEC 61936-1 [1]. NOTE 2 High-voltage switchgear prefabricated substations can include instrument transformers, according to IEC 61869 (all parts). These substations are not high-voltage/low-voltage transformer prefabricated substations.

PDF Catalog

PDF Pages PDF Title
1 30462301
187 A-30408461
188 undefined
192 Annex ZA (normative)Normative references to international publicationswith their corresponding European publications
195 English
CONTENTS
202 FOREWORD
204 INTRODUCTION
205 1 Scope
206 2 Normative references
208 3 Terms and definitions
3.1 General terms and definitions
3.2 Assemblies of switchgear and controlgear
3.3 Parts of assemblies
209 3.4 Switching devices
210 3.5 Parts of switchgear and controlgear
3.6 Operational characteristics of switchgear and controlgear
211 3.7 Characteristic quantities
3.8 Index of definitions
4 Normal and special service conditions
4.1 Normal service conditions
4.1.1 General
212 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
213 4.2 Special service conditions
4.2.1 General
4.2.2 Altitude
4.2.3 Exposure to pollution
214 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
215 5.2 Rated voltage (Ur)
5.3 Rated insulation level (Ud, Up, Us)
216 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)
217 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)
218 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
219 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)
220 5.102.3 Rated arc fault currents (IA, IAe)
5.102.4 Rated arc fault duration (tA, tAe)
6 Design and construction
221 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
222 6.4 Auxiliary and control equipment and circuits
6.4.1 General
6.4.2 Protection against electric shock
223 6.4.3 Components installed in enclosures
6.5 Dependent power operation
6.6 Stored energy operation
224 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
225 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
226 6.101 Protection of the prefabricated substation against mechanical stress
6.102 Protection of the environment due to internal defects
227 6.103 Internal arc fault
6.104 Enclosure
6.104.1 General
228 6.104.2 Fire behaviour
Table 1 – Synthetic material characteristics
229 6.104.3 Environmental considerations
6.104.4 Covers and doors
230 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
231 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
232 7 Type tests
7.1 General
7.1.1 Basics
233 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 – Type tests
234 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 ≤ 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
235 7.2.12 Voltage test as condition check
7.2.101 Tests on the high-voltage components
236 7.2.102 Tests on low-voltage interconnection
237 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
238 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
239 7.5.102 Test conditions
Figure 1 – Measurement of power transformer temperature rise in ambient air: ∆t1
Figure 2 – Measurement of power transformer temperature rise in an enclosure: ∆t2
240 7.5.103 Test methods
241 Figure 3 – Diagram of the preferred continuous current test method
242 Figure 4 – Diagram of the continuous current test alternative method
243 Figure 5 – Diagram for open-circuit test
244 7.5.104 Measurements
246 7.5.105 Acceptance criteria
Figure 6 – Example of air temperature measurement locationsinside a non-walk-in type prefabricated substation
247 7.5.106 Continuous current test under solar radiation
7.6 Short-time withstand current and peak withstand current tests
248 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
249 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
250 7.102 Internal arc test
7.102.1 General
7.102.2 Test conditions
251 7.102.3 Arrangement of the equipment
7.102.4 Test procedure
7.102.5 Criteria to pass the test
253 7.102.6 Test report
7.102.7 Transferability of tests results
254 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
255 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
256 9.102 Selection of rated values
9.103 Selection of class of enclosure
257 9.104 Internal arc fault
9.104.1 General
9.104.2 Causes and preventive measures
9.104.3 Supplementary protective measures
258 Table 3 – Locations, causes and examples of measures decreasingthe probability of internal arcs
259 9.104.4 Considerations for the selection and installation
9.104.5 IAC classification
260 9.105 Summary of technical requirements and ratings
Table 4 – Single phase-to-earth arc fault current dependingon the network neutral earthing
261 Table 5 – Summary of technical requirements, characteristicsand ratings relevant for prefabricated substations
266 10 Information to be given with enquiries, tenders and orders (informative)
10.1 General
10.2 Information with enquiries and orders
267 10.3 Information with tenders
11 Transport, storage, installation, operating instructions and maintenance
11.1 General
268 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
269 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
270 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
271 Annex A (normative)Internal arc fault – 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
272 Figure A.1 – Mounting frame for vertical indicators
Figure A.2 – Horizontal indicators
273 A.3.2 Arrangement of indicators
279 A.4 Tolerances for geometrical dimensions of test arrangements
A.5 Test parameters
Figure A.3 – Arrangement of indicators
280 A.6 Test procedure
Figure A.4 – Selection of tests on high-voltage switchgearand controlgear for class IAC-A
281 Figure A.5 – Selection of tests on high-voltage switchgearand controlgear for class IAC-B
282 Figure A.6 – Selection of tests on high-voltage interconnections for class IAC-A
283 Figure A.7 – Selection of tests on high-voltage interconnections for class IAC-B
285 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
287 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
288 Figure C.1 – Impact test apparatus
289 Annex D (informative)Rating of power transformers in an enclosure
D.1 General
D.2 Mineral-oil-immersed power transformer
290 D.3 Dry-type power transformer
Figure D.1 – 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 – Dry-type power transformer load factor outside of the enclosure
291 Figure D.3 – Insulation class 105 °C (A) dry-type powertransformers load factor in an enclosure
292 Figure D.4 – Insulation class 120 °C (E) dry-type powertransformers load factor in an enclosure
Figure D.5 – Insulation class 130 °C (B) dry-type powertransformers load factor in an enclosure
293 Figure D.6 – Insulation class 155 °C (F) dry-type powertransformers load factor in an enclosure
Figure D.7 – Insulation class 180 °C (H) dry-type powertransformers load factor in an enclosure
294 D.4 Example
Figure D.8 – Insulation class 200 °C (H) dry-type powertransformers load factor in an enclosure
Figure D.9 – Insulation class 220 °C (H) dry-type powertransformers load factor in an enclosure
297 Annex E (informative)Examples of earthing arrangements
Figure E.1 – Example of earthing arrangement
298 Figure E.2 – Example of earthing arrangement
299 Figure E.3 – Example with the framework serving as part of the main earthing conductor
300 Annex F (informative)Characteristics of enclosure materials
F.1 Metals
F.1.1 Coatings
F.1.2 Paints
F.2 Concrete
Table F.1 – Treatment of coatings
Table F.2 – Tests of coatings
301 Table F.3 – Test of concrete
302 Annex G (informative)Evaluation of the impact of solar radiation –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
303 Figure G.1 – Indicative arrangement of laboratory radiation sources (e.g. radiant heat lamps) for continuous current test with simulated solar radiation
304 G.2.3 Test procedure and application of test currents
G.2.4 Measurements
305 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
307 Annex H (informative)Installation conditions of electronic equipment
H.1 General
H.2 Accessibility
308 H.3 Application of air temperature measurements inside the prefabricated substation
309 Bibliography

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BS EN IEC 62271-202:2022 - TC
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