EN 62271-1:2008

SLOVENSKI STANDARD
01-februar-2009
1DGRPHãþD
SIST EN 60694:2001
SIST EN 60694:2001/A1:2002
SIST EN 60694:2001/A2:2002
Visokonapetostne stikalne in krmilne naprave - 1. del: Skupne specifikacije (IEC
62271-1:2007)
High-voltage switchgear and controlgear - Part 1: Common specifications (IEC 62271-
1:2007)
Hochspannungs-Schaltgeräte und -Schaltanlagen - Teil 1: Allgemeine Festlegungen
(IEC 62271-1:2007)
Appareillage à haute tension - Partie 1: Spécifications communes (CEI 62271-1:2007)
Ta slovenski standard je istoveten z: EN 62271-1:2008
ICS:
29.130.10 Visokonapetostne stikalne in High voltage switchgear and
krmilne naprave controlgear
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 62271-1
NORME EUROPÉENNE
December 2008
EUROPÄISCHE NORM
ICS 29.130.10; 29.130.99 Supersedes EN 60694:1996 + A1:2000 + A2:2001

English version
High-voltage switchgear and controlgear -
Part 1: Common specifications
(IEC 62271-1:2007)
Appareillage à haute tension -  Hochspannungs-Schaltgeräte
Partie 1: Spécifications communes und -Schaltanlagen -
(CEI 62271-1:2007) Teil 1: Gemeinsame Bestimmungen
(IEC 62271-1:2007)
This European Standard was approved by CENELEC on 2008-11-01. CENELEC members are bound to comply
with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard
the status of a national standard without any alteration.

Up-to-date lists and bibliographical references concerning such national standards may be obtained on
application to the Central Secretariat or to any CENELEC member.

This European Standard exists in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CENELEC member into its own language and notified
to the Central Secretariat has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Cyprus, the
Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Central Secretariat: rue de Stassart 35, B - 1050 Brussels

© 2008 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 62271-1:2008 E
Foreword
The text of document 17A/799/FDIS, future edition 1 of IEC 62271-1, prepared by SC 17A, High-voltage
switchgear and controlgear, of IEC TC 17, Switchgear and controlgear, was submitted to the
IEC-CENELEC parallel vote and was approved by CENELEC as EN 62271-1 on 2008-11-01.
This European Standard supersedes EN 60694:1996 + corrigendum May 1999 + A1:2000 + A2:2001.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2009-08-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2011-11-01
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 62271-1:2007 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standards indicated:
IEC 60068-1 NOTE  Harmonized as EN 60068-1:1994 (not modified).
IEC 60099-4 NOTE  Harmonized as EN 60099-4:2004 (modified).
IEC 60664-1 NOTE  Harmonized as EN 60664-1:2007 (not modified).
IEC 62271-100 NOTE  Harmonized as EN 62271-100:2001 (not modified).
ISO 9001 NOTE  Harmonized as EN ISO 9001:2000 (not modified).
__________
- 3 - EN 62271-1:2008
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

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.

NOTE  When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD
applies.
Publication Year Title EN/HD Year

1) 2)
IEC 60034-1 - Rotating electrical machines - EN 60034-1 2004
Part 1: Rating and performance

3)
IEC 60038 1983 IEC standard voltages HD 472 S1 1989
(mod) + corr. February 2002
+ A1 1995
1)
IEC 60050-131 - International Electrotechnical Vocabulary - -
(IEV) -
Part 131: Circuit theory
1)
IEC 60050-151 - International Electrotechnical Vocabulary - -
(IEV) -
Part 151: Electrical and magnetic devices

1)
IEC 60050-191 - International Electrotechnical Vocabulary - -
(IEV) -
Chapter 191: Dependability and quality of
service
1)
IEC 60050-351 - International Electrotechnical Vocabulary - -
(IEV) -
Part 351: Control technology
1)
IEC 60050-441 - International Electrotechnical Vocabulary - -
(IEV) -
Chapter 441: Switchgear, controlgear and
fuses
1)
IEC 60050-446 - International Electrotechnical Vocabulary - -
(IEV) -
Chapter 446: Electrical relays

1)
IEC 60050-551 - International Electrotechnical Vocabulary - -
(IEV) -
Part 551: Power electronics
1)
IEC 60050-581 - International Electrotechnical Vocabulary - -
(IEV) -
Part 581: Electromechanical components for
electronic equipment
1)
IEC 60050-601 - International Electrotechnical Vocabulary - -
(IEV) -
Chapter 601: Generation, transmission and
distribution of electricity - General

1)
Undated reference.
2)
Valid edition at date of issue.
3)
The title of HD 472 S1 is: Nominal voltages for low voltage public electricity supply systems.

Publication Year Title EN/HD Year

1)
IEC 60050-604 - International Electrotechnical Vocabulary - -
(IEV) -
Chapter 604: Generation, transmission and
distribution of electricity - Operation

1)
IEC 60050-605 - International Electrotechnical Vocabulary - -
(IEV) -
Chapter 605: Generation, transmission and
distribution of electricity - Substations

1)
IEC 60050-811 - International Electrotechnical Vocabulary - -
(IEV) -
Chapter 811: Electric traction

1)
IEC 60050-826 - International Electrotechnical Vocabulary - -
(IEV) -
Part 826: Electrical installations

1) 2)
IEC 60051-1 - Direct acting indicating analogue electrical EN 60051-1 1998
measuring instruments and their accessories -
Part 1: Definitions and general requirements
common to all parts
1) 2)
IEC 60051-2 - Direct acting indicating analogue electrical EN 60051-2 1989
measuring instruments and their accessories -
Part 2: Special requirements for ammeters
and voltmeters
1) 2)
IEC 60051-4 - Direct acting indicating analogue electrical EN 60051-4 1989
measuring instruments and their accessories -
Part 4: Special requirements for frequency
meters
1) 2)
IEC 60051-5 - Direct acting indicating analogue electrical EN 60051-5 1989
measuring instruments and their accessories -
Part 5: Special requirements for phase
meters, power factor meters and
synchroscopes
1) 2)
IEC 60059 - IEC standard current ratings EN 60059 1999

IEC 60060-1 1989 High-voltage test techniques -
+ corr. March 1990 Part 1: General definitions and test HD 588.1 S1 1991
requirements
1) 2)
IEC 60064 - Tungsten filament lamps for domestic and EN 60064 1995
(mod) similar general lighting purposes - + A11 2007
Performance requirements
IEC 60068-2 Series Environmental testing - EN 60068-2 Series
Part 2: Tests
IEC 60071-1 2006 Insulation co-ordination - EN 60071-1 2006
Part 1: Definitions, principles and rules

IEC 60071-2 1996 Insulation co-ordination - EN 60071-2 1997
Part 2: Application guide
1) 2)
IEC 60073 - Basic and safety principles for man-machine EN 60073 2002
interface, marking and identification - Coding
principles for indicators and actuators

1) 2)
IEC 60081 - Double-capped fluorescent lamps - EN 60081 1998
Performance specifications
1)
IEC/TR 60083 - Plugs and socket-outlets for domestic and - -
similar general use standardized in member
countries of IEC
- 5 - EN 62271-1:2008
Publication Year Title EN/HD Year

1) 2)
IEC 60085 - Electrical insulation - Thermal evaluation and EN 60085 2008
designation
IEC 60115-4 Series Fixed resistors for use in electronic - -
equipment -
Part 4: Sectional specification: Fixed power
resistors
IEC 60130 Series Connectors for frequencies below 3 MHz EN 60130 Series

4)
IEC 60227 Series Polyvinyl chloride insulated cables of rated - -
voltages up to and including 450/750 V

1) 2)
IEC 60228 - Conductors of insulated cables EN 60228 2005
+ corr. May 2005
5)
IEC 60245 Series Rubber insulated cables - Rated voltages up - -
to and including 450/750 V
1) 2)
IEC 60255-8 - Electrical relays - EN 60255-8 1998
(mod) Part 8: Thermal electrical relays

1) 2)
IEC 60255-21-1 - Electrical relays - EN 60255-21-1 1995
Part 21: Vibration, shock, bump and seismic
tests on measuring relays and protection
equipment -
Section 1: Vibration tests (sinusoidal)

1) 2)
IEC 60255-21-3 - Electrical relays - EN 60255-21-3 1995
Part 21: Vibration, shock, bump and seismic
tests on measuring relays and protection
equipment -
Section 3: Seismic tests
1) 2)
IEC 60269-2 - Low-voltage fuses - HD 60269-2 2007
(mod) Part 2: Supplementary requirements for fuses
for use by authorized persons (fuses mainly
for industrial application) - Examples of
standardized systems of fuses A to I

1) 2)
IEC 60270 - High-voltage test techniques - Partial EN 60270 2001
discharge measurements
1) 2)
IEC 60296 - Fluids for electrotechnical applications - EN 60296 2004
Unused mineral insulating oils for + corr. September 2004
transformers and switchgear
1) 2)
IEC 60309-1 - Plugs, socket-outlets and couplers for EN 60309-1 1999
industrial purposes - + A11 2004
Part 1: General requirements
1) 2)
IEC 60309-2 - Plugs, socket-outlets and couplers for EN 60309-2 1999
industrial purposes - + A11 2004
Part 2: Dimensional interchangeability
requirements for pin and contact-tube
accessories
1) 2)
IEC 60376 - Specification of technical grade sulfur EN 60376 2005
hexafluoride (SF ) for use in electrical
equipment
4)
The HD 21 series, which is related to, but not directly equivalent with the IEC 60227 series, applies instead.
5)
The HD 22 series, Cables of rated voltages up to and including 450/750 V and having cross-linked insulation, which
is related to, but not directly equivalent with the IEC 60245 series, applies instead.

Publication Year Title EN/HD Year

1)
IEC 60393-1 - Potentiometers for use in electronic - -
equipment -
Part 1: Generic specification
IEC 60417 Data- Graphical symbols for use on equipment - -
base
1) 2)
IEC 60445 - Basic and safety principles for man-machine EN 60445 2007
(mod) interface, marking and identification -
Identification of equipment terminals and
conductor terminations
1) 2)
IEC 60480 - Guidelines for the checking and treatment of EN 60480 2004
sulphur hexafluoride (SF ) taken from
electrical equipment and specification for its
re-use
1)
IEC 60502-1 - Power cables with extruded insulation and - -
their accessories for rated voltages from 1 kV
(U = 1,2 kV) up to 30 kV (U = 36 kV) -
m m
Part 1: Cables for rated voltages of 1 kV
(U = 1,2 kV) and 3 kV (U = 3,6 kV)
m m
1) 2)
IEC 60507 - Artificial pollution tests on high-voltage EN 60507 1993
insulators to be used on a.c. systems

IEC 60512-2 Series Connectors for electronic equipment - Tests EN 60512-2 Series
and measurements -
Part 2: Electrical continuity and contact
resistance tests
IEC 60529 1989 Degrees of protection provided by enclosures EN 60529 1991
(IP Code) + corr. May 1993
IEC 60617 Data- Graphical symbols for diagrams - -
base
1) 2)
IEC 60669-1 - Switches for household and similar fixed- EN 60669-1 1999
(mod) electrical installations -
Part 1: General requirements
IEC 60695-1 Series Fire hazard testing - EN 60695-1 Series
Part 1: Guidance for assessing the fire hazard
of electrotechnical products
IEC 60695-7 Series Fire hazard testing - EN 60695-7 Series
Part 7: Toxicity of fire effluent

1) 2)
IEC 60721-1 - Classification of environmental conditions - EN 60721-1 1995
Part 1: Environmental parameters and their
severities
IEC 60721-2 Series Classification of environmental conditions - HD 478.2 Series
Part 2: Environmental conditions appearing in
nature
IEC 60721-3 Series Classification of environmental conditions - EN 60721-3 Series
Part 3: Classification of groups of
environmental parameters and their severities

1) 2)
IEC 60730-2-9 - Automatic electrical controls for household EN 60730-2-9 2002
(mod) and similar use - + A11 2003
Part 2-9: Particular requirements for
temperature sensing controls
1) 2)
IEC 60730-2-13 - Automatic controls for household and similar EN 60730-2-13 2008
(mod) use -
Part 2-13: Particular requirements for humidity
sensing controls
- 7 - EN 62271-1:2008
Publication Year Title EN/HD Year

IEC/TR 60815 1986 Guide for the selection of insulators in - -
respect of polluted conditions

1) 2)
IEC 60909-0 - Short-circuit currents in three-phase a.c. EN 60909-0 2001
systems -
Part 0: Calculation of currents

1)
IEC/TR 60909-1 - Short-circuit currents in three-phase a.c. - -
systems -
Part 1: Factors for the calculation of short-
circuit currents according to IEC 60909-0

6) 1)
IEC 60932 - Additional requirements for enclosed - -
switchgear and controlgear from 1 kV to
72,5 kV to be used in severe climatic
conditions
1) 2)
IEC 60947-2 - Low-voltage switchgear and controlgear - EN 60947-2 2006
Part 2: Circuit-breakers
1) 7)
IEC 60947-3 - Low-voltage switchgear and controlgear - EN 60947-3 200X
Part 3: Switches, disconnectors, switch-
disconnectors and fuse-combination units

1) 2)
IEC 60947-4-1 - Low-voltage switchgear and controlgear - EN 60947-4-1 2001
Part 4-1: Contactors and motor-starters -
Electromechanical contactors and motor-
starters
1) 2)
IEC 60947-4-2 - Low-voltage switchgear and controlgear - EN 60947-4-2 2000
Part 4-2: Contactors and motor-starters - AC
semiconductor motor controllers and starters

1) 2)
IEC 60947-5-1 - Low-voltage switchgear and controlgear - EN 60947-5-1 2004
Part 5-1: Control circuit devices and + corr. July 2005
switching elements - Electromechanical
control circuit devices
1) 2)
IEC 60947-7-1 - Low-voltage switchgear and controlgear - EN 60947-7-1 2002
Part 7-1: Ancillary equipment - Terminal
blocks for copper conductors
1) 2)
IEC 60947-7-2 - Low-voltage switchgear and controlgear - EN 60947-7-2 2002
Part 7-2: Ancillary equipment - Protective
conductor terminal blocks for copper
conductors
1) 2)
IEC 61000-4-1 - Electromagnetic compatibility (EMC) - EN 61000-4-1 2007
Part 4-1: Testing and measurement
techniques - Overview of IEC 61000-4 series

1) 2)
IEC 61000-4-4 - Electromagnetic compatibility (EMC) - EN 61000-4-4 2004
Part 4-4: Testing and measurement
techniques - Electrical fast transient/burst
immunity test
1) 2)
IEC 61000-4-11 - Electromagnetic compatibility (EMC) - EN 61000-4-11 2004
Part 4-11: Testing and measurement
techniques - Voltage dips, short interruptions
and voltage variations immunity tests

6)
IEC 60932 is superseded by IEC/TS 62271-304, which is harmonized as CLC/TS 62271-304.
7)
To be ratified.
Publication Year Title EN/HD Year

1) 2)
IEC 61000-4-17 - Electromagnetic compatibility (EMC) - EN 61000-4-17 1999
Part 4-17: Testing and measurement
techniques - Ripple on d.c. input power port
immunity test
1) 2)
IEC 61000-4-18 - Electromagnetic compatibility (EMC) - EN 61000-4-18 2007
Part 4-18: Testing and measurement + corr. September 2007
techniques - Damped oscillatory wave
immunity test
1) 2)
IEC 61000-4-29 - Electromagnetic compatibility (EMC) - EN 61000-4-29 2000
Part 4-29: Testing and measurement
techniques - Voltage dips, short interruptions
and voltage variations on d.c. input power port
immunity tests
IEC 61000-5 Series Electromagnetic compatibility (EMC) - EN 61000-5 Series
Part 5: Installation and mitigation guidelines

1) 2)
IEC 61000-6-2 - Electromagnetic compatibility (EMC) - EN 61000-6-2 2005
Part 6-2: Generic standards - Immunity for + corr. September 2005
industrial environments
1)
IEC/TS 61000-6-5 - Electromagnetic compatibilty (EMC) - - -
Part 6-5: Generic standards - Immunity for
power station and substation environments

1)
IEC 61020-4 - Electromechanical switches for use in - -
electronic equipment -
Part 4: Sectional specification for lever
(toggle) switches
1) 2)
IEC 61180-1 - High-voltage test techniques for low-voltage EN 61180-1 1994
equipment -
Part 1: Definitions, test and procedure
requirements
8) 1)
IEC/TS 61634 - High-voltage switchgear and controlgear - - -
Use and handling of sulphur hexafluoride
(SF )
IEC 61810 Series Electromechanical elementary relays EN 61810 Series

1)
IEC 62063 - High-voltage switchgear and controlgear - - -
The use of electronic and associated
technologies in auxiliary equipment of
switchgear and controlgear
1) 2)
IEC 62262 - Degrees of protection provided by EN 62262 2002
enclosures for electrical equipment against
external mechanical impacts (IK code)

9) 1) 2)
IEC 62271-2 - High-voltage switchgear and controlgear - EN 62271-2 2003
Part 2: Seismic qualification for rated voltages
of 72,5 kV and above
1)
IEC/TR 62271-300 - High-voltage switchgear and controlgear - - -
Part 300: Seismic qualification of alternating
current circuit-breakers
1) 2)
IEC 62326-1 - Printed boards - EN 62326-1 2002
Part 1: Generic specification
8)
IEC/TS 61634 is superseded by IEC/TR 62271-303.
9)
IEC 62271-2 is superseded by IEC 62271-207, which is harmonized as EN 62271-207.

- 9 - EN 62271-1:2008
Publication Year Title EN/HD Year

1) 2)
CISPR 11 - Industrial scientific and medical (ISM) radio- EN 55011 2007
(mod) frequency equipment - Electromagnetic
disturbance characteristics - Limits and
methods of measurement
CISPR 16-1 Series Specification for radio disturbance and EN 55016-1 Series
immunity measuring apparatus and methods -
Part 1: Radio disturbance and immunity
measuring apparatus
1)
CISPR 18-2 - Radio interference characteristics of - -
overhead power lines and high-voltage
equipment -
Part 2: Methods of measurement and
procedure for determining limits

IEC 62271-1
Edition 1.0 2007-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
High-voltage switchgear and controlgear –
Part 1: Common specifications
Appareillage à haute tension –
Partie 1: Spécifications communes

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
XF
CODE PRIX
ICS 29.130.10; 29.130.99 ISBN 2-8318-9323-2

– 2 – 62271-1 © IEC:2007
CONTENTS
FOREWORD.6

1 General .8
1.1 Scope.8
1.2 Normative references .8
2 Normal and special service conditions .12
2.1 Normal service conditions .13
2.2 Special service conditions .14
3 Terms and definitions .16
3.1 General terms .16
3.2 Assemblies of switchgear and controlgear .19
3.3 Parts of assemblies .19
3.4 Switching devices.20
3.5 Parts of switchgear and controlgear .20
3.6 Operation .26
3.7 Characteristic quantities .29
3.8 Index of definitions .30
4 Ratings.32
4.1 Rated voltage (U ).33
r
4.2 Rated insulation level .33
4.3 Rated frequency (f ) .37
r
4.4 Rated normal current and temperature rise.37
4.5 Rated short-time withstand current (I ).40
k
4.6 Rated peak withstand current (I ).40
p
4.7 Rated duration of short circuit (t ) .41
k
4.8 Rated supply voltage of closing and opening devices and of auxiliary and
control circuits (U ) .41
a
4.9 Rated supply frequency of closing and opening devices and of auxiliary
circuits .43
4.10 Rated pressure of compressed gas supply for controlled pressure systems.43
4.11 Rated filling levels for insulation and/or operation.43
5 Design and construction .43
5.1 Requirements for liquids in switchgear and controlgear .43
5.2 Requirements for gases in switchgear and controlgear .43
5.3 Earthing of switchgear and controlgear.44
5.4 Auxiliary and control equipment.44
5.5 Dependent power operation.50
5.6 Stored energy operation .50
5.7 Independent manual or power operation (independent unlatched operation).51
5.8 Operation of releases .51
5.9 Low- and high-pressure interlocking and monitoring devices .52
5.10 Nameplates .52
5.11 Interlocking devices.53
5.12 Position indication .53
5.13 Degrees of protection provided by enclosures .54
5.14 Creepage distances for outdoor insulators.55
5.15 Gas and vacuum tightness .56

62271-1 © IEC:2007 – 3 –
5.16 Liquid tightness .56
5.17 Fire hazard (flammability).57
5.18 Electromagnetic compatibility (EMC) .57
5.19 X-ray emission .57
5.20 Corrosion .58
6 Type tests .58
6.1 General .58
6.2 Dielectric tests .60
6.3 Radio interference voltage (r.i.v.) test.67
6.4 Measurement of the resistance of circuits.67
6.5 Temperature-rise tests .68
6.6 Short-time withstand current and peak withstand current tests .71
6.7 Verification of the protection.73
6.8 Tightness tests .74
6.9 Electromagnetic compatibility tests (EMC).76
6.10 Additional tests on auxiliary and control circuits .82
6.11 X-radiation test procedure for vacuum interrupters .86
7 Routine tests .88
7.1 Dielectric test on the main circuit.88
7.2 Tests on auxiliary and control circuits.88
7.3 Measurement of the resistance of the main circuit .89
7.4 Tightness test.89
7.5 Design and visual checks .90
8 Guide to the selection of switchgear and controlgear.90
8.1 Selection of rated values .91
8.2 Continuous or temporary overload due to changed service conditions .91
9 Information to be given with enquiries, tenders and orders .92
9.1 Information with enquiries and orders .93
9.2 Information with tenders .93
10 Transport, storage, installation, operation and maintenance .94
10.1 Conditions during transport, storage and installation .94
10.2 Installation .94
10.3 Operation .96
10.4 Maintenance.96
11 Safety.99
11.1 Precautions by manufacturers .100
11.2 Precautions by users.100
11.3 Electrical aspects .100
11.4 Mechanical aspects.101
11.5 Thermal aspects.101
11.6 Operation aspects .101
12 Influence of the product on the environment . 101

Annex A (normative) Identification of test specimens . 102
Annex B (normative) Determination of the equivalent r.m.s. value of a short-time
current during a short circuit of a given duration .104
Annex C (normative) Method for the weatherproofing test for outdoor switchgear and
controlgear .105

– 4 – 62271-1 © IEC:2007
Annex D (normative) Requirements for auxiliary and control circuit components .108
Annex E (informative) Tightness (information, example and guidance).110
Annex F (normative) Tolerances on test quantities during tests .112
Annex G (informative) Information and technical requirements to be given with
enquiries, tenders and orders .115
Annex H (informative) Corrosion: Information regarding service conditions and
recommended test requirements .118
Annex I (informative) List of symbols and abbreviations used in IEC 62271-1 .119
Annex J (informative) Electromagnetic compatibility on site .121
Annex K (informative) List of notes concerning certain countries.122

Bibliography.123

Figure 1 – Altitude correction factor .15
Figure 2 – Examples of classes of contacts .49
Figure 3 – Diagram of connections of a three-pole switching device.63
Figure 4 – Diagram of a test circuit for the radio interference voltage test .77
Figure 5 – Test location of radiation meter .87
Figure B.1 – Determination of short-time current.104
Figure C.1 – Arrangement for weatherproofing test.106
Figure C.2 – Nozzle for weatherproofing test .107
Figure E.1 – Example of a tightness coordination chart, TC, for closed pressure
systems .110
Figure E.2 – Sensitivity and applicability of different leak-detection methods for
tightness tests .111

Table 1a – Rated insulation levels for rated voltages of range I, series I .34
Table 1b – Rated insulation levels for rated voltages of range I, series II (based on
a
current practice in some areas, including North America) .35
Table 2a – Rated insulation levels for rated voltages of range II .36
Table 2b – Additional rated insulation levels, based on current practice in some areas,
including North America for range II.37
Table 3 – Limits of temperature and temperature rise for various parts, materials and
dielectrics of high-voltage switchgear and controlgear .38
Table 4 – Direct current voltage .41
Table 5 – Alternating current voltage .42
Table 6 – Auxiliary contact classes .48
Table 7 – Degrees of protection .55
Table 8 – Example of grouping .58
Table 9 – Test conditions in general case .62
Table 10 – Power-frequency test conditions.63
Table 11 – Impulse test conditions.64
Table 12 – Test conditions for the alternative method .65
Table 13 – Permissible temporary leakage rates for gas systems .75
Table 14 – Application of voltages at the fast transient/burst test.80

62271-1 © IEC:2007 – 5 –
Table 15 – Application of voltage at the damped oscillatory wave test .81
Table 16 – Assessment criteria for transient disturbance immunity .81
Table D.1 – List of reference documents for auxiliary and control circuit components . 108
Table F.1 – Tolerances on test quantities for type test .113

– 6 – 62271-1 © IEC:2007
INTERNATIONAL ELECTROTECHNICAL COMMISSION
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HIGH-VOLTAGE SWITCHGEAR AND CONTROLGEAR –

Part 1: Common specifications
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
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international co-operation on all questions concerning standardization in the electrical and electronic fields. To
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agreement between the two organizations.
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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
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between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
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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
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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 62271-1 has been prepared by subcommittee 17A: High-voltage
switchgear and controlgear, of IEC technical committee 17: Switchgear and controlgear.
This standard cancels and replaces IEC 60694 published in 1996. This first edition of IEC
62271-1 constitutes a technical revision.
The text of this standard is based on the following documents:
FDIS Report on voting
17A/799/FDIS 17A/804/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.
The reader’s attention is drawn to the fact that Annex K lists all of the “in-some-country”

62271-1 © IEC:2007 – 7 –
clauses on differing practices of a less permanent nature relating to the subject of this
standard.
The list of all parts of 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.
– 8 – 62271-1 © IEC:2007
HIGH-VOLTAGE SWITCHGEAR AND CONTROLGEAR –

Part 1: Common specifications
1 General
1.1 Scope
This part of IEC 62271 applies to a.c. switchgear and controlgear designed for indoor and
outdoor installation and for operation at service frequencies up to and including 60 Hz on
systems having voltages above 1 000 V.
This standard applies to all high-voltage switchgear and controlgear except as otherwise
specified in the relevant IEC standards for the particular type of switchgear and controlgear.
NOTE For the use of this standard, high voltage (see IEV 601-01-27) is the rated voltage above 1 000 V.
However, the term medium voltage (see IEV 601-01-28) is commonly used for distribution systems with voltages
above 1 kV and generally applied up to and including 52 kV.
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 60034-1, Rotating electrical machines – Part 1: Rating and performance
IEC 60038:1983, IEC standard voltages
IEC 60050-131, International Electrotechnical Vocabulary (IEV) – Part 131: Circuit theory
IEC 60050-151, International Electrotechnical Vocabulary (IEV) − Part 151: Electrical and
magnetic devices
IEC 60050-191, International Electrotechnical Vocabulary (IEV) − Chapter 191: Dependability
and quality of service
IEC 60050-351, International Electrotechnical Vocabulary (IEV) – Part 351: Control
technology
IEC 60050-441, International Electrotechnical Vocabulary (IEV) − Chapter 441: Switchgear,
controlgear and fuses
IEC 60050-446, International Electrotechnical Vocabulary (IEV) – Chapter 446: Electrical relays
IEC 60050-551, International Electrotechnical Vocabulary (IEV) – Power electronics
IEC 60050-581, International Electrotechnical Vocabulary (IEV) – Chapter 581: Electro-
mechanical components for electronic equipment
IEC 60050-601, International Electrotechnical Vocabulary (IEV) – Chapter 601:Generation,
transmission and distribution of electricity – General
IEC 60050-604, International Electrotechnical Vocabulary (IEV) − Chapter 604: Generation,
transmission and distribution of electricity − Operation

62271-1 ©
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