DOWEI

CONTENTS

FOREWORD 4

1Scope 6

2Normative references 6

3Terms and definitions 7

4Normal and special service conditions 10

5Ratings 11

6Design and construction 14

7Type tests 27

8Routine tests 41

9Guide to the selection of switchgear and controlgear (informative) 44

10Information to be given with enquiries, tenders and orders (informative) 44

11Transport, storage, installation, operating instructions and maintenance 44

12Safety 50

13Influence of the product on the environment 51

Annex A (normative)  Test procedure for dielectric test on three-phase encapsulated

GIS, range II (above 245 kV) 52

Annex B (normative)  Methods for testing gas-insulated metal-enclosed switchgear

under conditions of arcing due to an internal fault 53

Annex C (informative)  Technical and practical considerations of site testing 56

Annex D (informative)  Calculation of pressure rise due to an internal fault 61

Annex E (informative)  Information to be given with enquiries, tenders and orders 62

Annex F (informative)  Service continuity 68

Annex G (informative)  List of notes concerning certain countries 76

Bibliography 77

Figure 1 – Pressure coordination 19

Figure 2 – Example of arrangement of enclosures and gas compartments 24

Figure F.1 – MRE1X (e.g. repair of disconnector to busbar) 71

Figure F.2 – MRE00 (e.g. during visual inspection) 71

Figure F.3 – MRE01 (e.g. repair of circuit-breaker) 72

Figure F.4 – MRE11 (e.g. repair of disconnector) 72

Figure F.5 – MRE11 (e.g. extension of switchgear with a feeder bay) 73

Figure F.6 – MRE13 (e.g. repair of disconnector) 73

Figure F.7 – MRE2X (e.g. on-site dielectric test of busbar section A) 74

Figure F.8 – MRE2X (e.g. on-site dielectric test of busbar section 1) 74

Figure F.9 – MRE00 (e.g. repair of circuit-breaker) 75

Table 1 – Reference table of service conditions relevant to GIS 11

Table 2 – Rated insulation levels for rated voltages for equipment of range I (245 kV

and below) 12

Table 3 – Rated insulation levels for rated voltages for equipment of range II (above

245 kV) 13

Table 4 – Performance criteria 20

Table 5 – Type tests 28

Table 6 – Test voltage for measuring PD intensity 31

Table 7 – On-site test voltages 48

Table A.1 – Switching impulse test conditions above 245 kV 52

Table E.1 – Normal and special service conditions 62

Table E.2 – Ratings 63

Table E.3 – Design and construction 64

Table E.4 – Bus ducts 65

Table E.5 – Bushing 65

Table E.6 – Cable connection 66

Table E.7 – Transformer connection 66

Table E.8 – Current transformer 66

Table E.9 – Inductive voltage transformer 66

Table E.10 – Documentation for enquiries and tenders 67

HIGH-VOLTAGE SWITCHGEAR AND CONTROLGEAR –

Part 203: AC gas-insulated metal-enclosed switchgear for rated voltages above 52 kV

1 Scope

This part of IEC 62271 specifies requirements for gas-insulated metal-enclosed switchgear in which the insulation is obtained, at least partly, by an insulating gas or gas mixture other than air at atmospheric pressure, for alternating current of rated voltages above 52 kV, for indoor and outdoor installation, and for service frequencies up to and including 60 Hz.

For the purpose of this document, the terms “GIS” and “switchgear” are used for “gas-insulated metal-enclosed switchgear”.

The gas-insulated metal-enclosed switchgear covered by this document consists of individual components intended to be directly connected together and able to operate only in this manner.

This document completes and amends, if applicable, the various relevant standards applying to the individual components constituting GIS.

2 Normative references

The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

IEC 60068-2-11, Environmental testing – Part 2-11: Tests – Test Ka: Salt mist

IEC 60068-2-17, Basic environmental testing procedures – Part 2-17: Tests – Test Q: Sealing

IEC 60085:2007, Electrical insulation – Thermal evaluation and designation

IEC 60099-4:2014, Surge arresters – Part 4: Metal-oxide surge arresters without gaps for a.c. systems

IEC 60137:2017, Insulated bushings for alternating voltages above 1 000 V

IEC 60141-1, Tests on oil-filled and gas-pressure cables and their accessories – Part 1: Oil-filled, paper or polypropylene paper laminate insulated, metal-sheathed cables and accessories for alternating voltages up to and including 500 kV

IEC 60270, High-voltage test techniques – Partial discharge measurements

IEC 60376, Specification of technical grade sulphur hexafluoride (SF6) and complementary gases to be used in its mixtures for use in electrical equipment

IEC 60480, Specifications for the re-use of sulphur hexafluoride (SF6) and its mixtures in electrical equipment

IEC 60840, Power cables with extruded insulation and their accessories for rated voltages above 30 kV (Um = 36 kV) up to 150 kV (Um = 170 kV) – Test methods and requirements

IEC 61869-1, Instrument transformers – Part 1: General requirements

IEC 61869-2, Instrument transformers – Part 2: Additional requirements for current transformers

IEC 61869-3, Instrument transformers – Part 3: Additional requirements for inductive voltage transformers

IEC 62067, Power cables with extruded insulation and their accessories for rated voltages above 150 kV (Um = 170 kV) up to 500 kV (Um = 550 kV) – Test methods and requirements

IEC 62271-1:2017, High-voltage switchgear and controlgear – Part 1: Common specifications for alternating current switchgear and controlgear

IEC 62271-4, High-voltage switchgear and controlgear – Part 4: Handling procedures for sulphur hexafluoride (SF6) and its mixtures

IEC 62271-100:2021, High-voltage switchgear and controlgear – Part  100: Alternating current circuit-breakers

IEC 62271-102:2018, High-voltage switchgear and controlgear – Part 102: Alternating current disconnectors and earthing switches

IEC 62271-209:2019, High-voltage switchgear and controlgear – Part 209: Cable connections for gas-insulated metal-enclosed switchgear for rated voltages above 52 kV – Fluid-filled and extruded insulation cables – Fluid-filled and dry-type cable-terminations

IEC 62271-211:2014, High-voltage switchgear and controlgear – Part 211: Direct connection between power transformers and gas-insulated metal-enclosed switchgear for rated voltages above 52 kV

ISO 22479, Corrosion of metals and alloys – Sulfur dioxide test in a humid atmosphere (fixed gas method)

Table 2 – Rated insulation levels for rated voltages for equipment of range I (245 kV and below)

Table 3 – Rated insulation levels for rated voltages for equipment of range II (above 245 kV)

Bibliography

[1]IEC 60050-441, International Electrotechnical Vocabulary (IEV) – Part 441: Switchgear, controlgear and fuses (available at www.electropedia.org)

[2]IEC 60050-471, International Electrotechnical Vocabulary (IEV) – Part 471: Insulators

(available at www.electropedia.org)

[3]IEC 60060-1, High-voltage test techniques – Part 1: General definitions and test requirements

[4]IEC 60071-1:2019, Insulation co-ordination – Part 1: Definitions, principles and rules

[5]IEC TS 60815-1:2008, Selection and dimensioning of high-voltage insulators intended for use in polluted conditions – Part 1: Definitions, information and general principles

[6]IEC TS 60815-2, Selection and dimensioning of high-voltage insulators intended for use in polluted conditions – Part 2: Ceramic and glass insulators for a.c. systems

[7]IEC TS 60815-3, Selection and dimensioning of high-voltage insulators intended for use in polluted conditions – Part 3: Polymer insulators for a.c. systems

[8]IEC 61462, Composite hollow insulators – Pressurized and unpressurized insulators for use in electrical equipment with rated voltage greater than 1 000 V – Definitions, test methods, acceptance criteria and design recommendations

[9]IEC 61672-1, Electroacoustics – Sound level meters – Part 1: Specifications

[10]IEC 61672-2, Electroacoustics – Sound level meters – Part 2: Pattern evaluation tests

[11]IEC 62155, Hollow pressurized and unpressurized ceramic and glass insulators for use in electrical equipment with rated voltages greater than 1 000 V

[12]IEC TR 62271-306:2012, High-voltage switchgear and controlgear – Part 306: Guide to IEC 62271-100, IEC 62271-1 and other IEC standards related to alternating current circuit-breakers

IEC TR 62271-306:2012/AMD1:2018

[13]IEC TS 62478, High voltage test techniques – Measurement of partial discharges by electromagnetic and acoustic methods

[14]IEC TS 63042-301, UHV AC transmission systems – Part 301: On-site acceptance tests

[15]EN 50052, High-voltage switchgear and controlgear – Gas-filled cast aluminium alloy enclosures

[16]EN 50064, High-voltage switchgear and controlgear – Gas-filled wrought aluminium and aluminium alloy enclosures

[17]EN 50068, High-voltage switchgear and controlgear – Gas-filled wrought steel enclosures

[18]EN 50069, High-voltage switchgear and controlgear – Gas-filled welded composite enclosures of cast and wrought aluminium alloys

[19]EN 50089, Specification for cast resin partitions for metal-enclosed gas-filled high- voltage switchgear and controlgear

[20]IEEE C37.122.6, IEEE Recommended Practice for the Interface of New Gas-Insulated Equipment in Existing Gas-Insulated Substations Rated above 52 kV

[21]IEEE C37.24, IEEE Guide For Evaluating the Effect of Solar Radiation on Outdoor Metal-

Enclosed Switchgear

[22]IEEE C37.122.1, IEEE Guide For Gas-Insulated Substations Rated above 52 kV

[23]CIGRE Technical Brochure 125, User guide for the application of gas-insulated switchgear (GIS) for rated voltages of 72,5 kV and above

[24]CIGRE Technical Brochure 602, Tools for simulation of the internal effects in HV and MV switchgear

[25]CIGRE Technical Brochure 654, UHF partial discharge detection system for GIS –

Application guide for sensitivity verification

[26]CIGRE Technical Brochure 802, Application of non-SF6 gases or gas-mixtures in medium and high voltage gas insulated switchgear

[27]CIGRE Technical Brochure 870, Service Continuity Guide for HV GIS above 52 kV

[28]CIGRE Session 1998 – WG 21/23/33-03, Assessment of the behaviour of gas-insulated electrical components in the presence of an internal arc, by G. Babusci. E. Colombo. R. Speziali. G. Aldrovandi. R. Bergmann. M. Lissandrin. G. Cordioli. C. Piazza.

[29]RGE: 04/82, Electrical faults mastery in high voltage SF6 insulated substations, by Gilles

Bernard, EDF, France. Published in Revue Générale de L’Electricité RGE 4/82, April 1982. (only available in French)

[30]CIGRE Technical Brochure of working group B3.57, Impact on Engineering and Lifetime Management of outdoor HV GIS 2

[31]IPCC Fifth Assessment Report – AR5 Climate Change 2013, The Physical Science Basis