Internationale

High-voltage switchgear and controlgear –

Part 102: Alternating current disconnectors and earthing switches

Appareillage à haute tension –

Partie 102: Sectionneurs et sectionneurs de terre à courant alternatif

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ICS 29.130.10; 29.130.99 ISBN 978-2-8322-0650-8

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– 2 – 62271-102  IEC: 2001+A1: 2011

+A2: 2013

CONTENTS

FOREWORD........................................................................................................................... 6

1 General.......................................................................................................................... 10

1.1 Scope................................................................................................................. 10

1.2 Normative references......................................................................................... 10

2 Normal and special service conditions............................................................................ 11

3 Definitions...................................................................................................................... 11

3.1 General terms..................................................................................................... 11

3.2 Assemblies of switchgear and controlgear.......................................................... 11

3.3 Parts of assemblies............................................................................................ 11

3.4 Switching devices............................................................................................... 11

3.5 Parts of switching devices.................................................................................. 13

3.6 Operation........................................................................................................... 14

3.7 Characteristic quantities..................................................................................... 15

4 Ratings........................................................................................................................... 18

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

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

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

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

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

4.6 Rated peak withstand current (I p)....................................................................... 19

4.7 Rated duration of short-circuit (t k)....................................................................... 19

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

and control circuits (U a)...................................................................................... 19

4.9 Rated supply frequency of closing and opening devices

and of auxiliary circuits....................................................................................... 19

4.10 Rated pressure of compressed gas supply for insulation and/or operation.......... 19

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

5.1 Requirements for liquids in disconnectors and earthing switches........................ 23

5.2 Requirements for gases in disconnectors and earthing switches......................... 23

5.3 Earthing of disconnectors and earthing switches................................................. 23

5.4 Auxiliary and control equipment.......................................................................... 23

5.5 Dependent power operation................................................................................ 24

5.6 Stored energy operation..................................................................................... 24

5.7 Independent manual operation............................................................................ 24

5.8 Operation of releases......................................................................................... 24

5.9 Low- and high-pressure interlocking and monitoring devices............................... 24

5.10 Nameplates........................................................................................................ 24

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

5.12 Position indication.............................................................................................. 25

5.13 Degree of protection by enclosures..................................................................... 25

5.14 Creepage distances............................................................................................ 26

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

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

5.17 Flammability....................................................................................................... 26

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

62271-102 © IEC: 2001+A1: 2011 – 3 –

+A2: 2013

6 Type tests...................................................................................................................... 28

6.1 General.............................................................................................................. 28

6.2 Dielectric tests.................................................................................................... 29

6.3 Radio interference voltage (riv) test.................................................................... 31

6.4 Measurement of the resistance of circuits........................................................... 32

6.5 Temperature-rise tests........................................................................................ 32

6.6 Short-time withstand current and peak withstand current tests............................ 32

6.7 Verification of the protection............................................................................... 34

6.8 Tightness tests................................................................................................... 34

6.9 Electromagnetic compatibility tests (EMC).......................................................... 34

7 Routine tests.................................................................................................................. 46

7.1 Dielectric test on the main circuit........................................................................ 46

7.2 Dielectric test on auxiliary and control circuits.................................................... 46

7.3 Measurement of the resistance of the main circuit.............................................. 47

7.4 Tightness test..................................................................................................... 47

7.5 Design and visual checks................................................................................... 47

8 Guide to the selection of disconnectors and earthing switches....................................... 47

9 Information to be given with enquiries, tenders and orders............................................. 50

10 Rules for transport, storage, installation, operation and maintenance............................. 53

10.1 Conditions during transport, storage and installation........................................... 53

10.2 Installation.......................................................................................................... 53

10.3 Operation........................................................................................................... 54

10.4 Maintenance....................................................................................................... 54

11 Safety............................................................................................................................. 54

11.1 Electrical aspects............................................................................................... 54

11.2 Mechanical aspects............................................................................................ 54

11.3 Thermal aspects................................................................................................. 54

11.4 Operation aspects.............................................................................................. 54

Annex A (normative) Design and testing of position indicating devices................................. 65

Annex B (normative) Bus-transfer current switching by disconnectors.................................. 70

Annex C (normative) Induced current switching by earthing switches................................... 77

Annex D (informative) Test voltage for the most disadvantageous dielectric position

of an earthing switch during operation (temporary approach)................................................ 87

Annex E (normative) Special requirements for disconnectors and earthing switches

used in gas-insulated and/or metal-enclosed switchgear....................................................... 88

Annex F (normative) Gas-insulated metal-enclosed switchgear for rated voltages

72, 5 kV and above – Requirements for switching of bus-charging currents by

disconnectors....................................................................................................................... 93

Annex G (normative) Alternative test methods for short-circuit current making tests.......... 101

Annex H (normative) Specific requirements for resistor fitted disconnector in metalenclosed

gas insulated switchgear...................................................................................... 103

Bibliography........................................................................................................................ 106

– 4 – 62271-102  IEC: 2001+A1: 2011

+A2: 2013

Figure 1 – Fixed contact parallel to support.......................................................................... 54

Figure 2 – Fixed contact (as indicated in figure 8) perpendicular to support.......................... 55

Figure 3 – Three-phase test arrangement for disconnectors and earthing switches

with rated voltages below 52 kV............................................................................................ 56

Figure 4 – Single-phase test arrangement for disconnectors with a horizontal isolating

distance and for earthing switches with rated voltage of 52 kV and above............................. 58

Figure 5 – Single-phase test arrangement for divided support disconnectors

(earthing switches) with a vertical isolating distance with rated voltages of 52 kV

and above to be used with flexible conductors...................................................................... 60

Figure 6 – Single-phase test arrangement for divided support disconnectors

(earthing switches) with a vertical isolating distance with rated voltages of 52 kV

and above to be used with rigid conductors.......................................................................... 62

Figure 7 – Example of the application of rated mechanical terminal loads to

a two-column disconnector................................................................................................... 63

Figure 8 – Example of the application of rated mechanical terminal loads

to a pantograph disconnector................................................................................................ 64

Figure A.1 – Position indicating device................................................................................. 69

Figure B.1 – Test circuits for bus-transfer current making and breaking tests........................ 76

Figure C.1 – Test circuit for electromagnetically induced current making and breaking

tests..................................................................................................................................... 85

Figure C.2 – Test circuits for electrostatically induced current making and breaking

tests..................................................................................................................................... 86

Figure F.1 – Test circuit for test duty 1.................................................................................. 95

Figure F.2 – Typical voltage waveform (Including VFT and FT components)......................... 96

Figure F.3 – Test circuit for test duty 2.................................................................................. 97

Figure F.4 – Test circuit for test duty 3.................................................................................. 98

Figure H.1 – Examples of resistor fitted disconnectors........................................................ 103

Table 1 – Recommended contact zones for " fixed" contacts supported

by flexible conductors........................................................................................................... 20

Table 2 – Recommended contact zones for " fixed" contacts supported

by rigid conductors............................................................................................................... 21

Table 3 – Recommended static mechanical terminal loads.................................................... 22

Table 3a – Classification of disconnectors for mechanical endurance................................... 23

Table 4 – Nameplate information.......................................................................................... 25

Table 5 – Power frequency 1 min withstand voltages............................................................ 31

Table 6 – Power frequency voltage tests............................................................................... 46

Table 7 – Classification of earthing switch for electrical endurance....................................... 23

Table 8 – Requirements on making current and pre-arcing time............................................ 37

Table 9 – Invalid tests........................................................................................................... 38

Table B.1 – Rated bus-transfer voltages for disconnectors.................................................... 71

Table C.1 – Standardized values of rated induced currents and voltages

for earthing switches............................................................................................................. 79

Table C.2 – Standardized values of recovery voltages for electromagnetically induced

current breaking tests........................................................................................................... 82

Table C.3 – Test circuit capacitances (C 1 values) for electrostatically induced current

making and breaking tests.................................................................................................... 83

62271-102 © IEC: 2001+A1: 2011 – 5 –

+A2: 2013

Table F.1 – Test voltages for making and breaking tests....................................................... 95

Table F.2 – Specified bus-charging currents......................................................................... 98

Table F.3 – Specified number of tests................................................................................... 98

– 6 – 62271-102  IEC: 2001+A1: 2011

+A2: 2013

INTERNATIONAL ELECTROTECHNICAL COMMISSION

____________

HIGH-VOLTAGE SWITCHGEAR AND CONTROLGEAR –

Part 102: Alternating current disconnectors