High-voltage switchgear and controlgear - Part 205: Compact switchgear assemblies for rated voltages above 52 kV

This part of IEC 62271 applies to compact switchgear assemblies consisting of at least one switching device directly connected to, or sharing components with, one or more other devices such that there is an interaction between the functions of the individual devices. Such assemblies are made up of devices defined in 1.101 and are designed, tested and supplied for use as a single unit. The interaction between devices may be due to proximity, sharing of components or a combination of both. The assemblies may contain components of air insulated switchgear (AIS) only or a combination of AIS and gas insulated switchgear (GIS), so called mixed technology switchgear (MTS) and may be delivered entirely prefabricated or partially assembled.

Appareillage à haute tension - Partie 205: Ensembles d'appareillages compacts de tensions assignées supérieures à 52 kV

La présente partie de la CEI 62271 s'applique aux ensembles d'appareillages compacts comprenant au moins un appareil de connexion directement connecté à, ou partageant des composants avec, un ou plusieurs appareils tel(s) qu'il existe une interaction entre les fonctions des appareils individuels. De tels ensembles sont constitués des appareils définis en 1.101, ils sont conçus, essayés et fournis pour être utilisés comme une seule unité. L'interaction entre les appareils peut être due à la proximité, au partage de composants ou à une combinaison des deux. Les ensembles peuvent comprendre des composants d'appareillages isolés à l'air (Air Insulated Switchgear - AIS) uniquement ou une combinaison d'AIS et d'appareillages à isolation gazeuse (Gas Insulated Switchgear - GIS), désignée sous le terme appareillage à technologie mixte (Mixed Technology Switchgear - MTS), ils peuvent être livrés entièrement préfabriqués ou partiellement assemblés.

General Information

Status
Published
Publication Date
14-Jan-2008
Technical Committee
Current Stage
PPUB - Publication issued
Start Date
15-Jan-2008
Completion Date
15-Jan-2008
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IEC 62271-205
Edition 1.0 2008-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
High-voltage switchgear and controlgear –
Part 205: Compact switchgear assemblies for rated voltages above 52 kV
Appareillage à haute tension –
Partie 205: Ensembles d'appareillages compacts de tensions assignées
supérieures à 52 kV
IEC 62271-205:2008
---------------------- Page: 1 ----------------------
THIS PUBLICATION IS COPYRIGHT PROTECTED
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---------------------- Page: 2 ----------------------
IEC 62271-205
Edition 1.0 2008-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
High-voltage switchgear and controlgear –
Part 205: Compact switchgear assemblies for rated voltages above 52 kV
Appareillage à haute tension –
Partie 205: Ensembles d'appareillages compacts de tensions assignées
supérieures à 52 kV
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX
ICS 29.130.10; 29.130.99 ISBN 2-8318-9511-1
---------------------- Page: 3 ----------------------
– 2 – 62271-205 © IEC:2008
CONTENTS

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

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

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

1.2 Normative references ..............................................................................................7

2 Normal and special service conditions ..............................................................................8

3 Terms and definitions .......................................................................................................8

3.1 General terms .........................................................................................................8

3.2 Compact switchgear assembly ................................................................................9

4 Rating ..............................................................................................................................9

4.1 Rated voltage (U ) ...................................................................................................9

4.2 Rated insulation level ............................................................................................10

4.3 Rated frequency (f )...............................................................................................10

4.4 Rated normal current (I ) and temperature rise ......................................................10

4.5 Rated short-time withstand current (I ) ..................................................................10

4.6 Rated peak withstand current (I ) ..........................................................................10

4.7 Rated duration of short circuit (t ) ..........................................................................10

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

control circuits (U )................................................................................................10

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

circuits ..................................................................................................................10

5 Design and construction .................................................................................................11

5.3 Earthing of switchgear and controlgear ...............................................................11

5.101 Earthing of compact switchgear assemblies and their controlgear.......................11

5.102 Pressure relief devices .......................................................................................11

5.10 Nameplates ........................................................................................................11

5.12 Position indication ..............................................................................................11

5.103 Locking devices for maintenance operation ........................................................11

5.104 Movement of pressurized devices .......................................................................12

5.105 Isolating distance for maintenance......................................................................12

6 Type tests ......................................................................................................................12

6.1 General ..............................................................................................................12

6.2 Dielectric tests....................................................................................................13

6.3 Radio interference voltage (r.i.v.) test .................................................................13

6.4 Measurement of the resistance of circuits ...........................................................14

6.5 Temperature-rise tests........................................................................................14

6.6 Short-time withstand current and peak withstand current tests............................14

6.101 Mechanical and environmental tests ...................................................................15

7 Routine tests ..................................................................................................................17

7.1 Dielectric test on the main circuit ........................................................................17

7.2 Tests on auxiliary and control circuits .................................................................17

7.3 Measurement of the resistance of the main circuit ..............................................17

7.101 Functional tests on auxiliary and control circuits .................................................17

8 Guide to the selection of switchgear and controlgear......................................................17

8.101 Guide to the selection of compact switchgear assemblies ...................................17

9 Information to be given with enquiries, tenders and orders .............................................18

---------------------- Page: 4 ----------------------
62271-205 © IEC:2008 – 3 –

10 Transport, storage, installation, operation and maintenance ...........................................18

10.1 Conditions during transport, storage and installation .............................................18

10.2 Installation ............................................................................................................18

10.3 Operation ..............................................................................................................18

10.4 Maintenance..........................................................................................................18

11 Safety.............................................................................................................................18

Annex AA (informative) Explanations of compact switchgear assemblies .............................19

Bibliography..........................................................................................................................23

Figure AA.1 – Example for type 1 .........................................................................................21

Figure AA.2 – Example for type 2 .........................................................................................21

Figure AA.3 – Example for type 3 .........................................................................................22

Figure AA.4 – Example for type 3 .........................................................................................22

Table 101 – Type tests on the compact switchgear assembly ...............................................12

---------------------- Page: 5 ----------------------
– 4 – 62271-205 © IEC:2008
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
HIGH-VOLTAGE SWITCHGEAR AND CONTROLGEAR –
Part 205: Compact switchgear assemblies
for rated voltages above 52 kV
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

in the subject dealt with may participate in this preparatory work. International, governmental and non-

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

Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC

Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any

misinterpretation by any end user.

4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications

transparently to the maximum extent possible in their national and regional publications. Any divergence

between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in

the latter.

5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any

equipment declared to be in conformity with an IEC Publication.

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

7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and

members of its technical committees and IEC National Committees for any personal injury, property damage or

other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and

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 62271-205 has been prepared by subcommittee 17C: High-voltage

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

controlgear.

This standard should be read in conjunction with IEC 62271-1, first edition, to which it refers

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

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

IEC 62771-1. Amendments to these clauses and subclauses are given under the same
numbering, whilst additional subclauses are numbered from 101.
---------------------- Page: 6 ----------------------
62271-205 © IEC:2008 – 5 –
The text of this standard is based on the following documents:
FDIS Report on voting
17C/418/FDIS 17C/423/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.

A list of all the parts in the IEC 62271 series, 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 maintenance result 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.
---------------------- Page: 7 ----------------------
– 6 – 62271-205 © IEC:2008
HIGH-VOLTAGE SWITCHGEAR AND CONTROLGEAR –
Part 205: Compact switchgear assemblies
for rated voltages above 52 kV
1 General
1.1 Scope

This part of IEC 62271 applies to compact switchgear assemblies consisting of at least one

switching device directly connected to, or sharing components with, one or more other

devices such that there is an interaction between the functions of the individual devices. Such

assemblies are made up of devices defined in 1.101 and are designed, tested and supplied

for use as a single unit. The interaction between devices may be due to proximity, sharing of

components or a combination of both. The assemblies may contain components of air

insulated switchgear (AIS) only or a combination of AIS and gas insulated switchgear (GIS),

so called mixed technology switchgear (MTS) and may be delivered entirely prefabricated or

partially assembled.

It is not possible to define all potential arrangements of compact switchgear assemblies

however four examples are shown for information in Annex A.

These compact switchgear assemblies are for indoor and/or outdoor installations in systems

having rated voltages above 52 kV and service frequencies of 50 Hz and 60 Hz.

This standard covers the influence on performance of the interactions between devices within

compact switchgear assemblies and defines ratings and test procedures for these assemblies.

IEC 62271-1 is applicable if not stated otherwise.

This standard does not apply to switchgear assemblies consisting solely of GIS which are

covered by 62271-203.
1.101 Objective

The objective of this standard is to respond to the increasing use of compact switchgear

assemblies that perform the functions of a number of separate devices and their controlgear.

Numerous arrangements are possible and this standard provides guidance on basic types of

assemblies which might be envisaged.

As there are potential interactions between devices within such assemblies, it is necessary to

consider the standardization requirements for the assembly in its entirety.

The devices, defined by IEC standards, which may form part of a compact switchgear

assembly are listed below:
---------------------- Page: 8 ----------------------
62271-205 © IEC:2008 – 7 –
Switching devices:
• Circuit-breakers IEC 62271-100
• Disconnectors/Earthing switches IEC 62271-102
• Switches IEC 60265-2
• Disconnecting circuit-breakers IEC 62271-108
Devices:
• Instrument transformers
– Current transformers IEC 60044-1, IEC 60044-8
– Voltage transformers IEC 60044-2, IEC 60044-5, IEC 60044-7
– Combined transformers IEC 60044-3
• Surge arresters IEC 60099-4
• Bushings IEC 60137
• Insulators IEC 61462, IEC 62155
• Cable connections IEC 62271-209
• Transformer connections IEC 61639

Each switching device, device and their controlgear forming part of a compact switchgear

assembly shall comply with the relevant individual standard. If part of the compact switchgear

assembly is formed by metal enclosed switchgear devices the requirements of IEC 62271-203

apply.

Compact switchgear assemblies, as defined in this standard, are considered to be a single

product with a single serial number and one set of documentation.
1.2 Normative references

The following referenced documents are indispensable for the application 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 60044-1, Instrument transformers – Part 1: Current transformers
IEC 60044-2, Instrument transformers – Part 2: Inductive voltage transformers
IEC 60044-3, Instrument transformers – Part 3: Combined transformers
IEC 60044-5, Instrument transformers – Part 5: Capacitor voltage transformers
IEC 60044-7, Instrument transformers – Part 7: Electronic voltage transformers
IEC 60044-8, Instrument transformers – Part 8: Electronic current transformers

IEC 60050-441, International Electrotechnical Vocabulary – Chapter 441: Switchgear,

controlgear and fuses

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

systems
IEC 60137, Insulated bushings for alternating voltages above 1 000 V
---------------------- Page: 9 ----------------------
– 8 – 62271-205 © IEC:2008

IEC 60265-2, High-voltage switches – Part 2: High-voltage switches for rated voltages of 52

kV and above

IEC 62271-209, 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 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

IEC/TR 61639, Direct connection between power transformers and gas-insulated metal-

enclosed switchgear for rated voltages of 72,5 kV and above
IEC 61936-1, Power installations exceeding 1 kV a.c. – Part 1: Common rules

IEC 62155, Hollow pressurized and unpressurized ceramic and glass insulators for use in

electrical equipment with rated voltages greater than 1 000 V

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

IEC 62271-100, High-voltage switchgear and controlgear – Part 100: High-voltage alternating-

current circuit-breakers

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

disconnectors and earthing switches

IEC 62271-108, High-voltage switchgear and controlgear – Part 108: High-voltage alternating

current disconnecting circuit-breakers for rated voltages of 72,5 kV and above

IEC 62271-203, 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 is applicable.
3 Terms and definitions

For the purposes of this document, the terms and definitions of IEC 60050 (441), IEC 62271-1

and the publications mentioned in 1.2 apply.
3.1 General terms
3.1.101 connected position (of a removable part)

position of a removable part in which it is fully connected for its intended function

[IEV 441-16-25]
---------------------- Page: 10 ----------------------
62271-205 © IEC:2008 – 9 –
3.1.102 disconnected position (of a withdrawable part)

position of a withdrawable part in which an isolating distance or segregation is established in

all the circuits of the withdrawable part, that part remaining mechanically attached to the

assembly
[IEV 441-16-28]
NOTE 1 The auxiliary circuits may not be disconnected in this position.

NOTE 2 This position may not be one in which it is safe to work on the withdrawn (moved) part.

3.2 Compact switchgear assembly
Subclause 3.2 of IEC 62271-1 is applicable with the following addition:

A compact switchgear assembly consists of at least one switching device directly connected

to, or sharing components with, one or more other devices such that there is an interaction

between the functions of the individual devices.

NOTE 1 A compact switchgear assembly may be mounted on one or more structures but it is only intended for

installation and operation as a single, complete unit.

NOTE 2 Interaction is the transfer of stresses (e.g. electrical, mechanical and thermal) between the individual

devices.
4 Rating

Clause 4 of IEC 62271-1 is partly applicable with the following distinctive features:

The rating of a compact switchgear assembly and its controlgear comprise the following :

a) rated voltage (U );
b) rated insulation level;
c) rated frequency (f );
d) rated normal current (l ) (for main circuits);
e) rated short-time withstand current (I ) (for main and earthing circuits);
f) rated peak withstand current (I ) (for main and earthing circuits);
g) rated duration of short-circuit (t );
and as applicable

h) rated values of the devices of the compact switchgear assembly, including their operating

devices (supply voltage and frequency), auxiliary and control equipment.

The ratings of the compact switchgear assembly shall be assigned to ensure that operation of

the assembly within its assigned ratings does not expose any individual device to conditions

which are outside its rated capabilities.
4.1 Rated voltage (U
Subclause 4.1 of IEC 62271-1 is applicable with the following addition:

The compact switchgear assembly shall be demonstrated to be suitable for the rated voltage.

NOTE 1 Devices forming part of the compact switchgear assembly may have individual values of rated voltage in

accordance with the relevant standards.
---------------------- Page: 11 ----------------------
– 10 – 62271-205 © IEC:2008

NOTE 2 For the purposes of this standard, the rated voltage (U ) defined in IEC 62271-1 is the rated voltage of

the compact switchgear assembly (U ).
4.2 Rated insulation level

Subclause 4.2 of IEC 62271-1 and the standards relevant to the components are applicable

with the following addition:

The compact switchgear assembly shall be demonstrated to be suitable for the rated

insulation level.
4.3 Rated frequency (f )
Subclause 4.3 of IEC 62271-1 is applicable with the following addition:

The compact switchgear assembly shall be demonstrated to be suitable for the rated

frequency.
4.4 Rated normal current (I ) and temperature rise
Subclause 4.4 of IEC 62271-1 is applicable with the following addition:

The compact switchgear assembly and its connections in the main current path shall be

demonstrated to be suitable for the rated normal current.
4.5 Rated short-time withstand current (I )
Subclause 4.5 of IEC 62271-1 is applicable with the following addition:

The compact switchgear assembly and its connections in the main current path and the

earthing switches shall be demonstrated to be suitable for the rated short-time withstand

current.
4.6 Rated peak withstand current (I )
Subclause 4.6 of IEC 62271-1 is applicable with the following addition:

The compact switchgear assembly and its connections in the main current path and the

earthing switches shall be demonstrated to be suitable for the rated peak withstand current.

4.7 Rated duration of short circuit (t )
Subclause 4.7 of IEC 62271-1 is applicable with the following addition:

The compact switchgear assembly and its connections in the main current path and the

earthing switches shall be demonstrated to be suitable for the rated duration of short-circuit.

4.8 Rated supply voltage of closing and opening devices and of auxiliary
and control circuits (U )

Subclause 4.8 of IEC 62271-1 and the standards relevant to the devices are applicable.

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

Subclause 4.9 of IEC 62271-1 and the standards relevant to the devices are applicable.

---------------------- Page: 12 ----------------------
62271-205 © IEC:2008 – 11 –
5 Design and construction

Clause 5 of IEC 62271-1 is applicable with the following addition, unless stated otherwise.

The design of compact switchgear assemblies shall take into account the possible

interactions (e.g. electrical, mechanical and thermal) in the performance of the different

devices.

In addition to the common clauses listed below, all devices which are part of the compact

switchgear assembly shall conform to the design requirements of their relevant IEC

standards.
5.3 Earthing of switchgear and controlgear
Subclause 5.3 of IEC 62271-1 is applicable with the following addition:
5.101 Earthing of compact switchgear assemblies and their controlgear

The compact switchgear assembly shall have either a common earthing terminal or each

device shall have its own earthing terminal.
5.101.1 Earthing of the main circuit compact switchgear assemblies

To ensure safety during maintenance, all parts of the main circuit to which access is required

or provided shall be capable of being earthed.
Earthing may be made by
a) earthing switches;
b) temporary connections.
5.102 Pressure relief devices

Any pressure relief device shall be designed to minimize the danger to an operator carrying

out normal operations on the compact switchgear assembly.
5.10 Nameplates
Subclause 5.10 of IEC 62271-1 is applicable with the following addition
...

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