High-voltage switchgear and controlgear - Part 112: Alternating current high-speed earthing switches for secondary arc extinction on transmission lines

IEC 62271-112:2013 applies to a.c. high-speed earthing switches designed for indoor and outdoor installation and for operation at service frequencies of 50 Hz and 60 Hz on systems having voltages of 550 kV and above. High-speed earthing switches described in this standard are intended to extinguish the secondary arc remaining after clearing faults on transmission lines by the circuit-breakers.
This publication is to be read in conjunction with IEC 62271-1:2007.

Appareillage à haute tension - Partie 112: Sectionneurs de terre rapides à courant alternatif pour l'extinction de l'arc secondaire sur les lignes de transport

La CEI 62271-112:2013 s'applique aux sectionneurs de terre rapides à courant alternatif conçus pour les installations intérieures et extérieures et pour fonctionner à des fréquences utiles de 50 Hz et 60 Hz sur des réseaux de tensions supérieures ou égales à 550 kV. Les sectionneurs de terre rapides décrits dans la présente norme sont destinés à supprimer l'arc secondaire demeurant après l'élimination des défauts sur les lignes de transport par les disjoncteurs.
Cette publication doit être lue conjointement avec la CEI 62271-1:2007.

General Information

Status
Published
Publication Date
05-Aug-2013
Technical Committee
Current Stage
PPUB - Publication issued
Start Date
06-Aug-2013
Completion Date
06-Aug-2013
Ref Project

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IEC 62271-112
Edition 1.0 2013-08
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
High-voltage switchgear and controlgear –
Part 112: Alternating current high-speed earthing switches for secondary arc
extinction on transmission lines
Appareillage à haute tension –

Partie 112: Sectionneurs de terre rapides à courant alternatif pour l’extinction de

l’arc secondaire sur les lignes de transport
IEC 62271-112:2013
---------------------- Page: 1 ----------------------
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---------------------- Page: 2 ----------------------
IEC 62271-112
Edition 1.0 2013-08
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
High-voltage switchgear and controlgear –
Part 112: Alternating current high-speed earthing switches for secondary arc
extinction on transmission lines
Appareillage à haute tension –

Partie 112: Sectionneurs de terre rapides à courant alternatif pour l’extinction de

l’arc secondaire sur les lignes de transport
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX U
ICS 29.130.10; 29.130.99 ISBN 978-2-8322-1009-3

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 – 62271-112 © IEC:2013
CONTENTS

FOREWORD ........................................................................................................................... 4

1 General ............................................................................................................................ 6

1.1 Scope ...................................................................................................................... 6

1.2 Normative references .............................................................................................. 6

2 Normal and special service conditions .............................................................................. 6

3 Terms and definitions ....................................................................................................... 6

3.1 General terms ......................................................................................................... 6

3.2 Assemblies of switchgear and controlgear ............................................................... 8

3.3 Parts of assemblies ................................................................................................. 8

3.4 Switching devices .................................................................................................... 8

3.5 Parts of switchgear and controlgear ........................................................................ 8

3.6 Operation ................................................................................................................ 8

3.7 Characteristics quantities ........................................................................................ 8

4 Ratings ............................................................................................................................. 8

5 Design and construction ................................................................................................. 10

6 Type tests ...................................................................................................................... 11

7 Routine tests .................................................................................................................. 14

8 Guide to the selection of HSES ...................................................................................... 14

9 Information to be given with enquiries, tenders and orders ............................................. 14

10 Rules for transport, storage, installation, operation and maintenance ............................. 15

11 Safety ............................................................................................................................. 15

Annex A (informative) Background information on the use of HSES ..................................... 16

Annex B (informative) Induced current and voltage conditions for other cases ..................... 21

Figure 1 – Explanation of a multi-phase auto-reclosing scheme .............................................. 7

Figure 2 – Timing chart of HSES and circuit-breakers ............................................................. 9

Figure A.1 – Single-line diagram of a power system .............................................................. 17

Figure A.2 – Timing chart of the HSESs in relation to the transmission line circuit-

breakers ............................................................................................................................... 17

Figure A.3 – Typical timing chart showing the time between fault initiation and a

successful re-close of the transmission line circuit-breakers ................................................. 18

Figure B.1 – System condition to explain successive fault ..................................................... 22

Figure B.2 – Example of waveforms of delayed current zero phenomena .............................. 22

Figure B.3 – Typical test circuit for electromagnetic coupling test-duty of a HSES with

delayed current zero crossings ............................................................................................. 24

Figure B.4 – Typical test circuit for electrostatic coupling test-duty of HSES with

delayed current zero crossings ............................................................................................. 24

Table 1 – Standardized values of rated induced currents and voltages ................................. 10

Table 2 – Items to be listed on nameplate of a HSES ............................................................ 11

Table A.1 – Comparison of earthing switches ........................................................................ 19

Table A.2 – Comparison of a four-legged reactor and HSES ................................................. 20

Table B.1 – Preferred values for single-phase earth fault with delayed current zero

phenomena in the presence of a successive fault ................................................................. 23

---------------------- Page: 4 ----------------------
62271-112 © IEC:2013 – 3 –

Table B.2 – Preferred values for multi-phase earth faults in a double-circuit system ............. 25

Table B.3 – Preferred values for covering the cases of categories 0 and 1 ............................ 25

---------------------- Page: 5 ----------------------
– 4 – 62271-112 © IEC:2013
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
HIGH-VOLTAGE SWITCHGEAR AND CONTROLGEAR –
Part 112: Alternating current high-speed earthing switches
for secondary arc extinction on transmission lines
FOREWORD

1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising

all national electrotechnical committees (IEC National Committees). The object of IEC is to promote

international co-operation on all questions concerning standardization in the electrical and electronic fields. To

this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,

Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC

Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested

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governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely

with the International Organization for Standardization (ISO) in accordance with conditions determined by

agreement between the two organizations.

2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international

consensus of opinion on the relevant subjects since each technical committee has representation from all

interested IEC National Committees.

3) IEC Publications have the form of recommendations for international use and are accepted by IEC National

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assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any

services carried out by independent certification bodies.

6) All users should ensure that they have the latest edition of this publication.

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expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC

Publications.

8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is

indispensable for the correct application of this publication.

9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of

patent rights. IEC shall not be held responsible for identifying any or all such patent rights.

International Standard IEC 62271-112 has been prepared by subcommittee 17A: High-voltage

switchgear and controlgear, of IEC technical committee 17: Switchgear and controlgear.

The text of this standard is based on the following documents:
FDIS Report on voting
17A/1042/FDIS 17A/1050/RVD

Full information on the voting for the approval of this standard can be found in the report on

voting indicated in the above table.

This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.

This International Standard should be read in conjunction with IEC 62271-1:2007, to which it

refers and which is applicable unless otherwise specified. In order to simplify the indication of

---------------------- Page: 6 ----------------------
62271-112 © IEC:2013 – 5 –

corresponding requirements, the same numbering of clauses and subclauses is used as in

IEC 62271-1. Amendments to these clauses and subclauses are given under the same
numbering, whilst additional subclauses, are numbered from 101.

A list of all parts in the IEC 62271, published under the general title High-voltage switchgear

and controlgear, can be found on the IEC website.

The committee has decided that the contents of this publication will remain unchanged until

the stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data

related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.

IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates

that it contains colours which are considered to be useful for the correct

understanding of its contents. Users should therefore print this document using a

colour printer.
---------------------- Page: 7 ----------------------
– 6 – 62271-112 © IEC:2013
HIGH-VOLTAGE SWITCHGEAR AND CONTROLGEAR –
Part 112: Alternating current high-speed earthing switches
for secondary arc extinction on transmission lines
1 General
1.1 Scope

This part of IEC 62271 applies to a.c. high-speed earthing switches designed for indoor and

outdoor installation and for operation at service frequencies of 50 Hz and 60 Hz on systems

having voltages of 550 kV and above.

High-speed earthing switches described in this standard are intended to extinguish the

secondary arc remaining after clearing faults on transmission lines by the circuit-breakers.

1.2 Normative references

The following documents, in whole or in part, are normatively referenced in this document and

are indispensable for its application. For dated references, only the edition cited applies. For

undated references, the latest edition of the referenced document (including any
amendments) applies.

IEC 62271-1:2007, High-voltage switchgear and controlgear – Part 1: Common specifications

IEC 62271-100:2008, High-voltage switchgear and controlgear – Part 100: Alternating-current

circuit-breakers

IEC 62271-102:2001, High-voltage switchgear and controlgear – Part 102: Alternating current

disconnectors and earthing switches

IEC 62271-203:2011, High-voltage switchgear and controlgear – Part 203: Gas-insulated

metal-enclosed switchgear for rated voltages above 52 kV
2 Normal and special service conditions
Clause 2 of IEC 62271-1:2007 is applicable.
3 Terms and definitions

For the purposes of this document, the terms and definitions given in Clause 3 of

IEC 62271-1:2011, as well as the following apply.
3.1 General terms
3.1.101
secondary arc

arc that remains at the faulted point after interruption of the short-circuit current fed by the

network

Note 1 to entry: This secondary arc is supplied by electrostatic or electromagnetic induction from the adjacent

healthy phases.
---------------------- Page: 8 ----------------------
62271-112 © IEC:2013 – 7 –
3.1.102
single-phase auto-reclosing scheme

auto-reclosing scheme in which a faulted phase circuit is opened and automatically re-closed

independently from the other phases
3.1.103
multi-phase auto-reclosing scheme

auto-reclosing scheme applied to double circuit overhead lines in which all faulted phase

circuits are opened and re-closed independently provided that at least two different phases

remain un-faulted

Note 1 to entry: An example of multi-phase auto-reclosing scheme is indicated in Figure 1.

Line 1
Line 2
Line 1
Line 2
Line 1
Line 2
IEC 1895/13
Key
1) Up to 4 phases have a fault Closed circuit-breaker
2) Only the faulted phases have been tripped Open circuit-breaker
3) All circuit-breakers at both ends re-closed Re-closed circuit-breaker
Figure 1 – Explanation of a multi-phase auto-reclosing scheme
---------------------- Page: 9 ----------------------
– 8 – 62271-112 © IEC:2013

Note 2 to entry: Other than the scheme described in 3.1.102 and 3.1.103, a three-phase auto-reclosing scheme is

commonly applied. In this scheme, all three phases are tripped and re-closed at both ends even if a fault occurred

in one phase. So far high-speed earthing switches are rarely applied with this scheme.

3.1.104
successive fault

additional earth fault that occurs in the adjacent phase circuit(s) during the time interval

between a single-phase earth fault and the opening of the high-speed earthing switch(es)

3.2 Assemblies of switchgear and controlgear
No particular definitions.
3.3 Parts of assemblies
No particular definitions.
3.4 Switching devices
3.4.101
high-speed earthing switch
HSES
earthing switch that has the capability to:
– make, carry and interrupt the induced current;

– withstand the recovery voltage caused by electromagnetic and/or by electrostatic

couplings prior to circuit re-closure;
– make and carry the rated short-circuit current

Note 1 to entry: The high-speed operation applies normally to both closing and opening.

Note 2 to entry: A high-speed earthing switch is not intended to be used as a maintenance earthing switch.

3.4.103.1
high-speed earthing switch class M0

high-speed earthing switch having a normal mechanical endurance of 1 000 operation cycles

3.4.103.2
high-speed earthing switch class M1

high-speed earthing switch having an extended mechanical endurance of 2 000 operation

cycles for special requirements
3.5 Parts of switchgear and controlgear
No particular definitions.
3.6 Operation
No particular definitions.
3.7 Characteristics quantities
No particular definitions.
4 Ratings
Clause 4 of IEC 62271-1:2007 is applicable with the following additions.
---------------------- Page: 10 ----------------------
62271-112 © IEC:2013 – 9 –
4.4 Rated normal current and temperature rise
Subclause 4.4 of IEC 62271-1:2007 is not applicable.
4.101 Rated short-circuit making current
Subclause 4.101 of IEC 62271-102:2001 is applicable.
4.102 Rated operating sequence

The rated characteristics of the HSES are referred to the rated operating sequence.

a) C – t – O
b) C – t – O – t – C – t – O
i1 i2 i1
where

– t is a time that is longer than the time required for secondary arc extinction and for

dielectric recovery of air insulation at the faulted point. t is determined by users

considering system stability. The preferred value of t is 0,15 s;

is the intermediate time that is given by the system protection. t includes the closing

– t
i2 i2

time of the circuit-breakers after the HSESs open, the duration of a new line fault and the

breaking time of the circuit-breakers. Following this t time, the HSES can be reclosed.

The preferred value of t is 0,5 s;
In this case the HSES shall be able to operate without intentional time delay.

Figure 2 shows the time chart for the rated operating sequence of C – t – O – t – C – t –

i1 i2 i1
Closed
Circuit-breaker
Open
Closed
Open
HSES
Current flow in HSES Current flow in HSES
t t t
i1 i2 i1
time
1 2 3 4 5 6 7 1 3 4 5 6
IEC 1896/13
Key
Circuit- Transmission line circuit-breakers that 3 Contact touch of HSESs
breaker interrupt the fault

HSES High-speed earthing switches 4 Energizing of the opening release of the HSESs

1 Energizing of the closing circuit of the 5 Contact separation of HSESs
HSESs
2 Current start in HSESs 6 Arc extinction in HSESs
t , t Times defined in 4.102 7 Fully open position of HSESs
i1 i2

NOTE 1 A common value for the re-closing time of the circuit-breaker is 1 s to guarantee system stability.

NOTE 2 t is normally within the range of 0,15 s to 0,5 s.
NOTE 3 t is normally within the range of 0,5 s to 1 s.

NOTE 4 The operating sequence b) is for system stability requirements to cover cases where another fault occurs

on the same phase.
NOTE 5 The HSES closing time is normally less than 0,2 s
Figure 2 – Timing chart of HSES and circuit-breakers
---------------------- Page: 11 ----------------------
– 10 – 62271-112 © IEC:2013
4.103 Standard values for interruption
Standard values for HSES are given in Table 1.
Table 1 – Standardized values of rated induced currents and voltages
Rated Electromagnetic coupling Electrostatic coupling
voltage U
Rated Rated First TRV Time to first Rated induced Rated induced
induced power peak peak current voltage
current frequency
+10 +10 +10 +10
% ( % ) ( % ) ( % )
recovery
+10 -0 -0 -0 -0
( )
( % )
voltage
+10
( % )
kV A (rms) kV (rms) kV ms A (rms) kV (rms)
550 6 800 240 580 0,6 120 115
800 6 800 240 580 0,6 170 170
1 100 to 6 800 240 580 0,6 230 235
1 200

NOTE 1 For Table 1 the rated induced voltages by electrostatic recovery voltage have a 1-cos wave shape.

NOTE 2 For networks with up to two faults (category 0 and 1 as described in B.2) the corresponding values are

presented in Table B.3.

For networks with delayed current zero crossing occurrence (category 3 as described in B.2),

the corresponding values are presented in Table B.1.

For networks with multi-phase faults (category 4 as described in B.2) the corresponding

values are presented in Table B.2.
5 Design and construction
Clause 5 of IEC 62271-1:2007 is applicable with the following modifications.
5.5 Dependent power operation
Subclause 5.5 of IEC 62271-1:2007 is not applicable.
5.7 Independent manual operation power operation (independent unlatched
operation)
Subclause 5.7 of IEC 62271-1:2007 is not applicable.
5.10 Nameplates
The designation of the equipment is specified as HSES.
Items to be indicated on the nameplate are listed in Table 2.
---------------------- Page: 12 ----------------------
62271-112 © IEC:2013 – 11 –
Table 2 – Items to be listed on nameplate of a HSES
Item
Manufacturer
Designation of type
Serial number
Year of manufacture
Rated voltage
Rated lightning impulse withstand voltage
Rated switching impulse withstand voltage
Rated power-frequency withstand voltage
Rated short-time withstand and peak withstand current
Rated duration of short-circuit
Rated filling pressure for insulation and /or operation
Rated supply voltage of auxiliary circuit
Rated frequency
Mechanical endurance class
Mass (including fluid)
Operating sequence
5.11 Interlocking devices
Subclause 5.11 of IEC 62271-1:2007 is not applicable.
5.101 Anti-pumping device

Anti-pumping device shall be provided for pneumatic and hydraulic operating mechanism.

5.102 Special requirements for HSES

A HSES shall be able to earth transmission lines and re-open to achieve their full voltage

withstand within the dead time of the auto-reclosing duty cycle of the transmission line circuit-

breakers. The dead time is defined by system stability and is normally set around 1 s enabling

dielectric recovery of insulation capability at the fault location. Fast operating capability for

both making and breaking is required.

The HSES shall have a capability to by-pass secondary arc current on the transmission lines.

The HSES shall have a capability to break induced current by electromagnetic and/or

electrostatic coupling on transmission lines with a recovery voltage specified in Table 1.

The HSES shall have a capability to withstand transient recovery voltage after interruption

and rated power frequency voltage to earth (U /√3) in open position.
The HSES shall be single-pole operated unless otherwise specified.
6 Type tests
Clause 6 of IEC 62271-1:2007 is applicable with the following additions.
---------------------- Page: 13 ----------------------
– 12 – 62271-112 © IEC:2013

The dielectric performance shall be verified for phase-to-earth in the open position only in

accordance with IEC 62271-1:2007.
6.1.1 Grouping of tests
Subclause 6.1.1 of IEC 62271-1:2007 is not applicable.
6.3 Radio interference voltage (r.i.v.) test
Subclause 6.3 of 62271-1:2007 is applicable.
In case of metal enclosed type, 6.3 of CEI 62271-203:2011 is applicable.
6.5 Temperature-rise tests
Subclause 6.5 of IEC62271-1:2007 is not applicable.
6.101 Tests to prove the short-circuit making performance
Subclause 6.101 of IEC 62271-102:2001 is applicable.
6.102 Operating and mechanical endurance tests
Subclause 6.102 of IEC 62271-102:2001 is applicable.
The rated operating sequence shall be verified during mechanical operation.
The mechanical operating sequence for class M0 shall be one of the following:
a) A HSES with a specified duty cycle required C – t – O:
– 1 000 C – t – O operations
b) A HSES with a specified duty cycle C – t – O – t – C – t – O
i1 i2 i1
– 500 C – t – O operations, plus
– 250 C – t – O – t – C – t – O operations.
i1 i2 i1
For class M1 the number of operations shall be twice the sequence specified.

Mechanical travel characteristics shall be recorded and acceptance criteria are referred to

6.101.1.1 of IEC 62271-100:2008 with the modification of the total tolerance to 20 % (for

+20 +10 +0
example % , % or % ).
-0 -10 -20
6.103 Operation under severe ice condition
Subclause 6.103 of 62271-102:2001 is applicable.
6.104 Operation at the temperature limits
Subclause 6.104 of 62271-102:2001 is applicable.
6.105 Tests to prove the making and breaking performance of HSES
6.105.1 General test conditions
Tests shall be performed in accordance with the condition specified in Table 1.

Subclause C.6.105 of IEC 62271-102:2001 is applicable with the following additions and

modifications.
---------------------- Page: 14 ----------------------
62271-112 © IEC:2013 – 13 –
Number of tests:
– 10 times C and O

Measurement of travel characteristics shall be in accordance with subclause 6.101.1.1 of

IEC 62271-100:2008.
Test circuits are those shown in Figures C.1 and C.2 of IEC 62271-102:2001.

For electrostatic induced current test independent of the rated voltage of the HSES, the test

circuit parameters shall be:
– capacitance value C = 1,56 µF;
– surge impedance: 245 Ω;
– line length 200 km.

The HSES shall preferably be tested at rated frequency; however, for convenience of testing,

tests at 50 Hz covers the requirement for 60 Hz and vice versa.

These tests cover the classes of A and B described in Annex C of IEC 62271-102:2001.

6.105.2 Induced current switching details
Type tests for HSES having a rated indu
...

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