High-voltage switchgear and controlgear - Part 4: Handling procedures for gases for insulation and/or switching

IEC 62271-4:2022 applies to the procedures for handling of gases for insulation and/or switching during installation, commissioning, repair, overhaul, normal and abnormal operations and disposal at the end‑of‑life of electric power equipment.
These procedures are regarded as minimum requirements to ensure the reliability of electric power equipment, the safety of personnel working with these gases and to minimize the impact on the environment. Additional requirements could be given or specified in the operating instruction manual of the manufacturer.
This second edition cancels and replaces the first edition of IEC 62271-4 published in 2013. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:  
title has been modified;
handling procedures of alternatives to SF6, which are used for insulation and/or switching, are added;
the main clauses are independent from the type of gas;
for each gas a separate annex describes gas specific information, handling procedures, safety measure, etc.;
information about SF6 (former Annex E) and about environmental effects of SF6 and its mixtures (former Annex F) has been moved to IEC 60376;
information about by-products of SF6 and its mixtures (former Annex G), the procedure for evaluating the potential effects on health of by-products of SF6 and its mixtures (former Annex H) and the cryogenic reclaim of SF6 (former Annex I) have been moved to IEC 60480.

Appareillage à haute tension - Partie 4: Procédures de manipulation des gaz pour l'isolation et/ou la commutation

L'IEC 62271-4:2022 s'applique aux procédures de manipulation des gaz pour l'isolation et/ou la commutation lors de l’installation, de la mise en service, de la réparation, de la révision, du fonctionnement normal ou anormal et de l'élimination en fin de cycle de vie de l'appareillage électrique.
Ces procédures sont considérées comme des exigences minimales pour garantir la fiabilité de l'appareillage électrique, la sécurité du personnel qui travaille avec ces gaz et pour réduire le plus possible l'impact sur l'environnement. Des exigences supplémentaires peuvent être formulées dans le manuel d'instructions d'exploitation du fabricant.
Cette seconde édition annule et remplace la première édition de l'IEC 62271-4 parue en 2013. Cette édition constitue une révision technique.
Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:  
l'intitulé a été modifié;
les procédures de manipulation des alternatives au SF6, utilisés pour l'isolation et/ou la commutation, sont ajoutées;
les principaux articles sont indépendants du type de gaz;
pour chaque gaz, une annexe distincte présente les informations spécifiques au gaz, les procédures de manipulation, les mesures de sécurité, etc.;
les informations relatives au SF6 (ancienne Annexe E) et aux effets sur l'environnement du SF6 et de ses mélanges (ancienne Annexe F) ont été déplacées vers l'IEC 60376;
les informations relatives aux produits de décomposition du SF6 et de ses mélanges (ancienne Annexe G), la procédure d'évaluation des effets potentiels sur la santé des produits de décomposition du SF6 et de ses mélanges (ancienne Annexe H) et la régénération cryogénique du SF6 (ancienne Annexe I) ont été déplacées vers l'IEC 60480.

General Information

Status
Published
Publication Date
21-Jul-2022
Current Stage
PPUB - Publication issued
Completion Date
22-Jul-2022
Ref Project

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IEC 62271-4
Edition 2.0 2022-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
High-voltage switchgear and controlgear –
Part 4: Handling procedures for gases for insulation and/or switching
Appareillage à haute tension –
Partie 4: Procédures de manipulation des gaz pour l'isolation et/ou la
commutation
IEC 62271-4:2022-07(en-fr)
---------------------- Page: 1 ----------------------
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---------------------- Page: 2 ----------------------
IEC 62271-4
Edition 2.0 2022-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
High-voltage switchgear and controlgear –
Part 4: Handling procedures for gases for insulation and/or switching
Appareillage à haute tension –
Partie 4: Procédures de manipulation des gaz pour l'isolation et/ou la
commutation
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.130.10; 29.130.99 ISBN 978-2-8322-4025-0

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 62271-4:2022 © IEC 2022
CONTENTS

FOREWORD ......................................................................................................................... 15

INTRODUCTION ................................................................................................................... 17

1 Scope ............................................................................................................................ 18

2 Normative references .................................................................................................... 18

3 Terms and definitions .................................................................................................... 19

3.1 General terms and definitions ............................................................................... 19

3.2 Terms and definitions for SF ............................................................................... 24

3.3 Terms and definitions for SF mixtures ................................................................. 24

3.4 Terms and definitions for compressed air .............................................................. 25

3.5 Terms and definitions for natural-origin gases ....................................................... 26

3.6 Terms and definitions for C F O (C5-FK) in mixtures with N , CO , O
5 10 2 2 2

(C5‑FK mixtures) .................................................................................................. 27

3.7 Terms and definitions for C F N (C4-FN) in mixtures with N , CO , O
4 7 2 2 2

(C4‑FN mixtures) .................................................................................................. 28

4 Gas handling during installation, commissioning and after repair or overhaul on

site ................................................................................................................................ 29

4.1 General ................................................................................................................. 29

4.2 Evacuation, filling and quality checking ................................................................. 30

4.3 Topping-up of pre-filled gas compartments to the filling pressure/density for

insulation and/or switching .................................................................................... 33

4.4 Filling sealed pressure systems ............................................................................ 35

5 Gas handling during normal service life ......................................................................... 35

5.1 Topping-up of gas to the filling pressure/density for insulation and/or

switching ............................................................................................................... 35

5.2 Checking the quality of the gas ............................................................................. 37

5.2.1 General ......................................................................................................... 37

5.2.2 On-site measurement of the quality of gases with portable measurement

equipment...................................................................................................... 37

5.2.3 Sampling and shipment of gases for off-site analysis ..................................... 38

5.3 Rectifying the composition of a gas mixture .......................................................... 38

6 Recovery and reclaiming of gases during maintenance, repair, overhaul or

dismantling on-site ........................................................................................................ 39

6.1 General ................................................................................................................. 39

6.2 Recovery and reclaiming of non-arced or normally arced gases from any gas

compartment ......................................................................................................... 39

6.3 Recovery and reclaiming from any gas compartment containing heavily

arced gas .............................................................................................................. 41

7 End-of-life of electric power equipment .......................................................................... 43

7.1 General ................................................................................................................. 43

7.2 End-of-life of controlled or closed pressure systems ............................................. 44

7.3 End-of-life of sealed pressure systems.................................................................. 44

7.4 Gas recovery and reclaiming at the end-of-life of sealed pressure systems ........... 45

7.5 Dismantling of electric power equipment (informative) ........................................... 49

Annex A (informative) Sulphur hexafluoride (SF ) ................................................................ 50

A.1 Gas properties ...................................................................................................... 50

A.2 Safety and first aid ................................................................................................ 50

A.2.1 General ......................................................................................................... 50

---------------------- Page: 4 ----------------------
IEC 62271-4:2022 © IEC 2022 – 3 –

A.2.2 Protection of personnel .................................................................................. 51

A.2.3 Handling of contaminated safety equipment and tools .................................... 53

A.2.4 Pressurised equipment and tools or measuring devices ................................. 53

A.2.5 Personal safety and protective equipment ...................................................... 53

A.2.6 Facilities and services ................................................................................... 54

A.2.7 Additional safety measures in case of sudden release of SF ........................ 54

A.2.8 First aid equipment and treatment ................................................................. 54

A.3 Environmental impact............................................................................................ 55

A.4 Training and certification ....................................................................................... 55

A.4.1 General ......................................................................................................... 55

A.4.2 Training ......................................................................................................... 56

A.4.3 Certification ................................................................................................... 57

A.5 Storage and transportation .................................................................................... 57

A.5.1 General ......................................................................................................... 57

A.5.2 Storage of containers filled with SF .............................................................. 57

A.5.3 Transportation of containers filled with SF ................................................... 58

A.5.4 Storage and transportation of electric power equipment containing SF ........ 59

A.5.5 Responsibilities ............................................................................................. 60

A.6 Description of handling equipment ........................................................................ 60

A.6.1 General ......................................................................................................... 60

A.6.2 Filters ............................................................................................................ 61

A.6.3 Vacuum pump ................................................................................................ 62

A.6.4 Main and vacuum compressors ...................................................................... 63

A.6.5 Outlet compressor ......................................................................................... 63

A.6.6 External and internal gas storage containers ................................................. 63

A.6.7 Evaporator and gas storage container heater................................................. 63

A.6.8 Gas piping and pipe junctions ........................................................................ 64

A.6.9 Control instruments ....................................................................................... 64

A.6.10 Safety valves ................................................................................................. 64

A.6.11 Flexible hose connections .............................................................................. 64

A.6.12 Portable devices for gas measurement .......................................................... 64

A.6.13 Gas leakage tester ........................................................................................ 66

A.6.14 Gas concentration alarm systems .................................................................. 66

A.6.15 Gas sampling cylinders .................................................................................. 67

A.7 Reclaiming procedures ......................................................................................... 67

A.8 By-products .......................................................................................................... 67

A.9 Procedure to evaluate the potential effects on health of by-products ..................... 67

A.10 Handling of SF .................................................................................................... 67

A.10.1 General ......................................................................................................... 67

A.10.2 Filling gas compartments with SF ................................................................ 67

A.10.3 Topping-up gas compartments with SF to the filling pressure for

insulation and/or switching ............................................................................. 67

A.10.4 Checking the quality of SF ........................................................................... 67

A.10.5 Recovery and reclaim of SF ......................................................................... 67

A.11 Specifications for SF needed for filling or topping-up electric power

equipment ............................................................................................................. 67

Annex B (informative) SF mixtures ..................................................................................... 68

---------------------- Page: 5 ----------------------
– 4 – IEC 62271-4:2022 © IEC 2022

B.1 Gas properties ...................................................................................................... 68

B.1.1 General ......................................................................................................... 68

B.1.2 Chemical properties ....................................................................................... 68

B.1.3 Physical properties ........................................................................................ 68

B.1.4 Insulating and switching behaviour ................................................................ 69

B.2 Safety and first aid ................................................................................................ 70

B.2.1 General ......................................................................................................... 70

B.2.2 Protection of personnel .................................................................................. 70

B.2.3 Handling of contaminated safety equipment and tools .................................... 70

B.2.4 Pressurised equipment and tools or measuring devices ................................. 70

B.2.5 Personal safety and protective equipment ...................................................... 70

B.2.6 Facilities and services ................................................................................... 70

B.2.7 Additional safety measures in case of sudden release of SF mixtures .......... 70

B.2.8 First aid equipment and treatment ................................................................. 70

B.3 Environmental impact............................................................................................ 70

B.4 Training and certification ....................................................................................... 70

B.4.1 General ......................................................................................................... 70

B.4.2 Training ......................................................................................................... 71

B.4.3 Certification ................................................................................................... 71

B.5 Storage and transportation .................................................................................... 71

B.5.1 General ......................................................................................................... 71

B.5.2 Storage of containers filled with SF mixture ................................................. 71

B.5.3 Transportation of containers filled with SF mixture ....................................... 73

B.5.4 Storage and transportation of electric power equipment containing SF

mixture .......................................................................................................... 74

B.5.5 Responsibilities ............................................................................................. 75

B.6 Description of handling equipment ........................................................................ 75

B.6.1 General ......................................................................................................... 75

B.6.2 Filters ............................................................................................................ 77

B.6.3 Vacuum pump ................................................................................................ 77

B.6.4 Main and vacuum compressors ...................................................................... 77

B.6.5 Outlet compressor ......................................................................................... 77

B.6.6 External and internal gas storage containers ................................................. 77

B.6.7 Evaporator and gas storage container heater................................................. 77

B.6.8 Gas piping and pipe junctions ........................................................................ 77

B.6.9 Control instruments ....................................................................................... 77

B.6.10 Safety valves ................................................................................................. 77

B.6.11 Flexible hose connections .............................................................................. 77

B.6.12 Portable devices for gas measurement .......................................................... 77

B.6.13 Gas leakage tester ........................................................................................ 78

B.6.14 Gas concentration alarm systems .................................................................. 78

B.6.15 Gas sampling cylinders .................................................................................. 79

B.6.16 Gas mixing unit .............................................................................................. 79

B.7 Reclaiming procedures ......................................................................................... 79

B.8 By-products .......................................................................................................... 79

B.9 Procedure to evaluate the potential effects on health of by-products ..................... 79

B.10 Handling of SF mixtures ...................................................................................... 79

B.10.1 General ......................................................................................................... 79

---------------------- Page: 6 ----------------------
IEC 62271-4:2022 © IEC 2022 – 5 –

B.10.2 Filling gas compartments with SF mixtures .................................................. 80

B.10.3 Topping-up gas compartments with SF mixtures to the filling pressure

for insulation and/or switching ....................................................................... 80

B.10.4 Checking the quality of SF mixtures ............................................................. 81

B.10.5 Recovery and reclaim of SF mixtures ........................................................... 81

B.10.6 Rectifying the composition of SF mixtures ................................................... 82

B.11 Specifications for SF mixtures needed for filling or topping-up electric

power equipment .................................................................................................. 82

Annex C (informative) Compressed air ................................................................................. 83

C.1 Gas properties ...................................................................................................... 83

C.1.1 General ......................................................................................................... 83

C.1.2 Chemical properties ....................................................................................... 83

C.1.3 Physical properties ........................................................................................ 83

C.1.4 Insulating and switching behaviour ................................................................ 84

C.2 Safety and first aid ................................................................................................ 84

C.2.1 General ......................................................................................................... 84

C.2.2 Protection of personnel .................................................................................. 85

C.2.3 Handling of contaminated safety equipment and tools .................................... 86

C.2.4 Pressurised equipment and tools or measuring devices ................................. 86

C.2.5 Personal safety and protective equipment ...................................................... 87

C.2.6 Facilities and services ................................................................................... 88

C.2.7 Additional safety measures in case of sudden release of compressed air ...... 88

C.2.8 First aid equipment and treatment ................................................................. 88

C.3 Environmental impact............................................................................................ 89

C.3.1 General ......................................................................................................... 89

C.3.2 Ecotoxicology ................................................................................................ 89

C.3.3 Ozone depletion ............................................................................................ 90

C.3.4 Global warming/climate change (greenhouse effect) ...................................... 90

C.3.5 Environmental impact of by-products ............................................................. 90

C.4 Training and certification ....................................................................................... 90

C.4.1 General ......................................................................................................... 90

C.4.2 Training ......................................................................................................... 90

C.4.3 Certification ................................................................................................... 91

C.5 Storage and transportation .................................................................................... 92

C.5.1 General ......................................................................................................... 92

C.5.2 Storage of containers filled with compressed air ............................................ 92

C.5.3 Transportation of containers filled with compressed air .................................. 92

C.5.4 Storage and transportation of electrical power equipment containing

compressed air .............................................................................................. 93

C.5.5 Responsibilities ............................................................................................. 93

C.6 Description of handling equipment ........................................................................ 93

C.6.1 General ......................................................................................................... 93

C.6.2 Filters ............................................................................................................ 94

C.6.3 Vacuum pump ................................................................................................ 95

C.6.4 Main and vacuum compressors ...................................................................... 96

C.6.5 Outlet compressor ......................................................................................... 96

C.6.6 External and internal gas storage containers ................................................. 96

C.6.7 Evaporator and gas storage container heater................................................. 96

---------------------- Page: 7 ----------------------
– 6 – IEC 62271-4:2022 © IEC 2022

C.6.8 Gas piping and pipe junctions ........................................................................ 96

C.6.9 Control instruments ....................................................................................... 96

C.6.10 Safety valves ................................................................................................. 97

C.6.11 Flexible hose connections .............................................................................. 97

C.6.12 Portable devices for gas measurement .......................................................... 97

C.6.13 Gas leakage tester ........................................................................................ 98

C.6.14 Gas concentration alarm systems .................................................................. 98

C.6.15 Gas sampling cylinders .................................................................................. 99

C.6.16 Gas purifying and filling device ...................................................................... 99

C.7 Reclaiming procedures ....................................................................................... 100

C.7.1 General ....................................................................................................... 100

C.7.2 Filtering recommendations ........................................................................... 100

C.7.3 Transport of used compressed air in gas cylinders and containers by

road ............................................................................................................. 100

C.8 By-products ........................................................................................................ 101

C.8.1 General ....................................................................................................... 101

C.8.2 Decompositi
...

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