High-voltage switchgear and controlgear - Part 202: High-voltage/ low-voltage prefabricated substation

IEC 62271-202:2014 specifies the service conditions, rated characteristics, general structural requirements and test methods of high voltage/low voltage or low voltage/high voltage prefabricated substations, which are cable-connected, to be operated from inside (walk-in type) or outside (non-walk-in type) for alternating current of rated voltages above 1 kV and up to and including 52 kV on the high voltage side, and for one or more transformers for service frequencies up to and including 60 Hz for outdoor installation at locations with public accessibility and where protection of personnel is provided. This second edition cancels and replaces the first edition published in 2006. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
a) regarding temperature-rise test an alternative method for liquid filled transformers is (re)introduced and the temperature-rise test method for dry-type transformers is specified more precisely;
b) testing procedure for short time and peak withstand current tests are specified more precisely;
c) assessment of electromagnetic fields is considered including a type test (optional) according IEC/TR 62271-208:2009;
d) influence of the product on the environment is considered (Clause 12);
e) internal arc test requirements have been adapted to IEC 62271-200:2011 and requirements for the assessment of pressure relief volumes below the floor / ground has been assigned;
f) the method for defining the load factor in an enclosure for liquid filled transformers is extended with different temperature rises for the transformer outside the enclosure (Annex DD);
g) for the calculation of the load factor of dry-type transformers in an enclosure the insulation systems according to IEC 60076-1:2011, Tables B.1 and B.2 are worked out in detail.
This publication is to be read in conjunction with IEC 62271-201:2007. The contents of the corrigendum of April 2015 have been included in this copy.

Appareillage à haute tension - Partie 202: Postes préfabriqués haute tension/basse tension

L'IEC 62271-202:2014 spécifie les conditions de service, les caractéristiques assignées, les exigences structurelles générales et les méthodes d'essai applicables aux postes préfabriqués haute tension/basse tension ou basse tension/haute tension qui sont connectés par câble, pour être manoeuvrés de l'intérieur (à aire de manoeuvre) ou de l'extérieur (sans aire de manoeuvre), pour courant alternatif de tensions assignées supérieures à 1 kV et inférieures ou égales à 52 kV côté haute tension, pour un ou plusieurs transformateurs, pour des fréquences de service inférieures ou égales à 60 Hz et pour installation extérieure, dans des endroits accessibles au public et où la protection des personnes est assurée. Cette deuxième édition annule et remplace la première édition, parue en 2006. Cette édition constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
a) eu égard à l'essai d'échauffement, une autre méthode pour les transformateurs immergés est (ré)introduite, et la méthode d'essai d'échauffement des transformateurs de type sec est spécifiée plus en détails;
b) la procédure d'essai au courant de courte durée et à la valeur de crête du courant admissible est spécifiée plus en détails;
c) l'évaluation des champs électromagnétiques est prise en compte, y compris un essai de type (facultatif) conforme à l'IEC/TR 62271-208:2009;
d) l'influence du produit sur l'environnement est prise en compte (Article 12);
e) les exigences d'essai d'arc interne ont été adaptées à l'IEC 62271-200:2011, et les exigences d'évaluation des volumes de décharge de pression sous le sol ont été attribuées;
f) la méthode de définition du facteur de charge dans une enveloppe pour transformateurs immergés a été étendue aux différents échauffements, pour le transformateur placé à l'extérieur de l'enveloppe (Annexe DD);
g) pour le calcul du facteur de charge des transformateurs de type sec dans une enveloppe, les systèmes d'isolation conformes au Tableaux B.1 et B.2 de l'IEC 60076-1:2011 ont été approfondis.
Cette publication doit être lue conjointement avec la CEI 62271-201:2007. Le contenu du corrigendum d'avril 2015 a été pris en considération dans cet exemplaire.

General Information

Status
Published
Publication Date
26-Mar-2014
Technical Committee
Current Stage
DELPUB - Deleted Publication
Completion Date
22-Jun-2022
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IEC 62271-202
Edition 2.0 2014-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
High-voltage switchgear and controlgear –
Part 202: High-voltage/low-voltage prefabricated substation
Appareillage à haute tension –
Partie 202: Postes préfabriqués haute tension/basse tension
IEC 62271-202:2014-03(en-fr)
---------------------- Page: 1 ----------------------
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---------------------- Page: 2 ----------------------
IEC 62271-202
Edition 2.0 2014-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
High-voltage switchgear and controlgear –
Part 202: High-voltage/low-voltage prefabricated substation
Appareillage à haute tension –
Partie 202: Postes préfabriqués haute tension/basse tension
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX XD
ICS 29.130.10 ISBN 978-2-8322-1483-1

Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
---------------------- Page: 3 ----------------------
– 2 – IEC 62271-202:2014 © IEC 2014
CONTENTS

FOREWORD ........................................................................................................................... 8

INTRODUCTION ................................................................................................................... 10

1 General ......................................................................................................................... 11

1.1 Scope .............................................................................................................. 11

1.2 Normative references ....................................................................................... 11

2 Normal and special service conditions ........................................................................... 13

2.1 Normal service conditions ................................................................................ 13

2.1.1 Indoor switchgear and controlgear .................................................. 13

2.1.1.101 Low-voltage switchgear and controlgear ......................................... 13

2.1.1.102 Transformer .................................................................................... 13

2.1.2 Outdoor switchgear and controlgear ............................................... 14

2.2 Special service conditions ................................................................................ 14

2.2.1 Altitude ........................................................................................... 14

2.2.2 Pollution ......................................................................................... 14

2.2.3 Temperature and humidity .............................................................. 15

2.2.4 Vibrations, shock or tilting............................................................... 15

2.2.5 Wind speed .................................................................................... 15

2.2.6 Other parameters ........................................................................... 15

3 Terms and definitions .................................................................................................... 15

4 Ratings .......................................................................................................................... 17

4.1 Rated voltage (U ) ........................................................................................... 18

4.2 Rated insulation level ....................................................................................... 18

4.3 Rated frequency (f ) ......................................................................................... 19

4.4 Rated normal current and temperature rise ...................................................... 19

4.4.1 Rated normal current (I ) ................................................................ 19

4.4.2 Temperature rise ............................................................................ 19

4.4.3 Particular points of Table 3 ............................................................. 19

4.5 Rated short-time withstand current (I ) ............................................................ 19

4.5.101 Rated short-time withstand current of high voltage switchgear
and controlgear and high voltage interconnection (I ) ..................... 20

4.5.102 Rated short-time phase to earth withstand current (I ) .................. 20

4.5.103 Rated short-time withstand currents of low voltage switchgear
and controlgear and low voltage interconnection (I ) .................... 20

4.6 Rated peak withstand current (I ) .................................................................... 20

4.6.101 Rated peak withstand current (I ) ................................................... 20

4.6.102 Rated peak phase to earth withstand current (I ) .......................... 20

4.6.103 Rated peak withstand currents of low voltage switchgear and
controlgear and low voltage interconnection (I ) ........................... 20

4.7 Rated durations of short circuit (t ) .................................................................. 20

4.7.101 Rated duration of short circuit (t ) ................................................... 21

4.7.102 Rated duration of phase to earth short circuit (t ) ......................... 21

4.7.103 Rated duration of short circuits for low voltage switchgear and

controlgear and low voltage interconnection ................................... 21

4.7.104 Rated duration of short circuits for transformers ............................. 21

4.8 Rated supply voltage of closing and opening devices and auxiliary and

control circuits (U ) .......................................................................................... 21

4.9 Rated supply frequency of closing and opening devices and of auxiliary

circuits ............................................................................................................. 21

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IEC 62271-202:2014 © IEC 2014 – 3 –
4.10 Rated pressure of compressed gas supply for controlled pressure

systems ........................................................................................................... 21

4.11 Rated filling levels for insulation and/or operation ............................................ 21

4.101 Rated maximum power and class of enclosure ................................................. 22

4.101.1 Rated maximum power of the prefabricated substation ................... 22

4.101.2 Rated class of enclosure ................................................................ 22

4.102 Ratings of the internal arc classification ........................................................... 22

4.102.1 General .......................................................................................... 22

4.102.2 Types of accessibility (A, B, AB) ..................................................... 22

4.102.3 Rated arc fault currents (I , I ) .................................................... 22

A Ae

4.102.4 Rated arc fault duration (t , t ) .................................................... 23

A Ae

5 Design and construction ................................................................................................ 23

5.1 Requirements for liquids in switchgear and controlgear .................................... 23

5.2 Requirements for gases in switchgear and controlgear .................................... 23

5.3 Earthing of switchgear and controlgear ............................................................ 24

5.4 Auxiliary and control equipment ....................................................................... 25

5.5 Dependent power operation ............................................................................. 25

5.6 Stored energy operation ................................................................................... 25

5.7 Independent manual or power operation (independent unlatched

operation) ........................................................................................................ 25

5.8 Operation of releases ....................................................................................... 25

5.9 Low- and high-pressure interlocking and monitoring devices ............................ 25

5.10 Nameplates...................................................................................................... 25

5.11 Interlocking devices ......................................................................................... 25

5.12 Position indication ............................................................................................ 26

5.13 Degree of protection provided by enclosures ................................................... 26

5.14 Creepage distances for outdoor insulators ....................................................... 26

5.15 Gas and vacuum tightness ............................................................................... 26

5.16 Liquid tightness ................................................................................................ 26

5.17 Fire hazard (flammability) ................................................................................ 26

5.18 Electromagnetic compatibility (EMC) ................................................................ 26

5.101 Protection of the prefabricated substation against mechanical stress ............... 26

5.102 Protection of the environment due to internal defects ....................................... 27

5.103 Internal arc fault ............................................................................................... 27

5.104 Enclosure ........................................................................................................ 28

5.104.1 General .......................................................................................... 28

5.104.2 Fire behaviour ................................................................................ 28

5.104.3 Corrosion ........................................................................................ 29

5.104.4 Covers and doors ........................................................................... 30

5.104.5 Ventilation openings ....................................................................... 30

5.104.6 Partitions ........................................................................................ 30

5.105 Other provisions............................................................................................... 31

5.105.1 Provisions for dielectric tests on cables .......................................... 31

5.105.2 Accessories .................................................................................... 31

5.105.3 Operation aisle ............................................................................... 31

5.105.4 Labels ............................................................................................ 31

5.106 Sound emission ............................................................................................... 31

5.107 Electromagnetic fields ...................................................................................... 31

6 Type tests ..................................................................................................................... 31

---------------------- Page: 5 ----------------------
– 4 – IEC 62271-202:2014 © IEC 2014

6.1 General ............................................................................................................ 31

6.1.1 Grouping of tests ............................................................................ 32

6.1.2 Information for identification of specimens ...................................... 32

6.1.3 Information to be included in type-test reports ................................ 32

6.2 Dielectric tests ................................................................................................. 33

6.2.1 Ambient air conditions during tests ................................................. 33

6.2.2 Wet test procedure ......................................................................... 33

6.2.3 Conditions of switchgear and controlgear during dielectric

tests ............................................................................................... 33

6.2.4 Criteria to pass the test .................................................................. 33

6.2.5 Application of the test voltage and test conditions ........................... 33

6.2.6 Tests of switchgear and controlgear of U ≤ 245 kV ........................ 33

6.2.7 Tests of switchgear and controlgear of U > 245 kV ........................ 33

6.2.8 Artificial pollution tests for outdoor insulators .................................. 33

6.2.9 Partial discharge tests .................................................................... 33

6.2.10 Dielectric tests on auxiliary and control circuits. .............................. 34

6.2.11 Voltage test as condition check ...................................................... 34

6.2.101 Tests on the high-voltage interconnection ....................................... 34

6.2.102 Tests on low-voltage interconnection .............................................. 35

6.3 Radio interference voltage (r.i.v.) test .............................................................. 36

6.4 Measurement of the resistance of circuits ........................................................ 36

6.5 Temperature-rise tests ..................................................................................... 36

6.5.101 General .......................................................................................... 36

6.5.102 Test conditions ............................................................................... 37

6.5.103 Test methods .................................................................................. 38

6.5.104 Measurements ................................................................................ 41

6.5.105 Acceptance criteria ......................................................................... 42

6.6 Short-time withstand current and peak withstand current tests ......................... 43

6.7 Verification of the protection ............................................................................ 43

6.8 Tightness tests ................................................................................................ 43

6.9 Electromagnetic compatibility tests (EMC) ....................................................... 43

6.10 Additional tests on auxiliary and control circuits ............................................... 44

6.10.1 General .......................................................................................... 44

6.10.2 Functional tests .............................................................................. 44

6.10.3 Electrical continuity of earthed metallic parts test ........................... 44

6.10.4 Verification of the operational characteristics of auxiliary

contacts .......................................................................................... 44

6.10.5 Environmental tests ........................................................................ 44

6.10.6 Dielectric test ................................................................................. 44

6.11 X-radiation test procedures for vacuum interrupters ......................................... 44

6.101 Calculations and mechanical tests ................................................................... 44

6.101.1 Wind pressure ................................................................................ 44

6.101.2 Roof loads ...................................................................................... 45

6.101.3 Mechanical impacts ........................................................................ 45

6.102 Internal arc test ................................................................................................ 45

6.102.1 General .......................................................................................... 45

6.102.2 Test conditions ............................................................................... 45

6.102.3 Arrangement of the equipment ........................................................ 46

6.102.4 Test procedure ............................................................................... 46

---------------------- Page: 6 ----------------------
IEC 62271-202:2014 © IEC 2014 – 5 –

6.102.5 Criteria to pass the test .................................................................. 46

6.102.6 Test report ...................................................................................... 47

6.102.7 Transferability of tests results ......................................................... 48

6.103 Measurement or calculation of electromagnetic fields ...................................... 48

7 Routine tests ................................................................................................................. 48

Replacement: ................................................................................................................ 49

7.101 Dielectric test on the high voltage interconnection............................................ 49

7.102 Voltage withstand tests on auxiliary circuits ..................................................... 49

7.103 Functional tests ............................................................................................... 49

7.104 Verification of correct wiring ............................................................................. 49

7.105 Tests after assembly on site ............................................................................ 49

8 Guide to the selection of prefabricated substation ......................................................... 49

Replacement: ................................................................................................................ 49

8.101 General ............................................................................................................ 49

8.102 Selection of rated values .................................................................................. 50

8.103 Selection of class of enclosure ......................................................................... 50

8.104 Internal arc fault ............................................................................................... 50

8.104.1 General .......................................................................................... 50

8.104.2 Causes and preventive measures ................................................... 51

8.104.3 Supplementary protective measures ............................................... 51

8.104.4 Considerations for the selection and installation ............................. 53

8.104.5 Internal arc test .............................................................................. 53

8.104.6 IAC classification ............................................................................ 53

8.105 Summary of technical requirements, ratings and optional tests ........................ 54

9 Information to be given with enquiries, tenders and orders ............................................ 58

9.1 Information with enquiries and orders .............................................................. 58

9.2 Information with tenders ................................................................................... 59

10 Transport, storage, installation, operation, maintenance ................................................ 60

10.1 Conditions during transport, storage and installation ........................................ 60

10.2 Installation ....................................................................................................... 60

10.2.1 Unpacking and lifting ...................................................................... 61

10.2.2 Assembly ........................................................................................ 61

10.2.3 Mounting ........................................................................................ 61

10.2.4 Connections ................................................................................... 61

10.2.5 Final installation inspection ............................................................. 61

10.2.6 Basic input data by the user ........................................................... 61

10.2.7 Basic input data by the manufacturer .............................................. 61

10.3 Operation ......................................................................................................... 61

10.4 Maintenance .................................................................................................... 62

10.101 Dismantling, recycling and disposal at the end-of-service life ........................... 62

11 Safety ............................................................................................................................ 62

11.101 Electrical aspects ............................................................................................. 62

11.102 Mechanical aspects ......................................................................................... 62

11.103 Thermal aspects .............................................................................................. 62

11.104 Internal arc aspects ......................................................................................... 62

12 Influence of the product on the environment .................................................................. 63

Annex AA (normative) Internal arc fault – Method to verify the internal arc

classification (IAC) ........................................................................................................ 64

---------------------- Page: 7 ----------------------
– 6 – IEC 62271-202:2014 © IEC 2014

AA.1 General ............................................................................................................ 64

AA.2 Room simulation .............................................................................................. 64

AA.3 Indicators (for assessing the thermal effects of the gases) ............................... 64

AA.3.1 General .......................................................................................... 64

AA.3.2 Arrangement of indicators ............................................................... 65

AA.4 Tolerances for geometrical dimensions of test arrangements ........................... 66

AA.5 Test parameters ............................................................................................... 67

AA.6 Test procedure ................................................................................................. 67

Annex BB (normative) Test to verify the sound level of a prefabricated substation ............... 76

BB.1 Purpose ........................................................................................................... 76

BB.2 Test specimen ................................................................................................. 76

BB.3 Test method ..................................................................................................... 76

BB.4 Measurements ................................................................................................. 76

BB.5 Presentation and calculation of the results ....................................................... 76

Annex CC (normative) Mechanical impact test ..................................................................... 78

CC.1 Test for the verification of the resistance to mechanical impact ........................ 78

CC.2 Apparatus for the verification of the protection against mechanical
damage............................................
...

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