EN 62271-202:2014

SLOVENSKI STANDARD
01-september-2014
1DGRPHãþD
SIST EN 62271-202:2007
Visokonapetostne stikalne in krmilne naprave - 202. del:
Visokonapetostna/nizkonapetostna montažna postaja (IEC 62271-202:2014)
High-voltage switchgear and controlgear - Part 202: High voltage/low voltage
prefabricated substation
Appareillages à haute tension - Partie 202: Postes préfabriqués haute tension/basse
tension
Ta slovenski standard je istoveten z: EN 62271-202:2014
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 62271-202

NORME EUROPÉENNE
EUROPÄISCHE NORM
June 2014
ICS 29.130.10 Supersedes EN 62271-202:2007
English Version
High-voltage switchgear and controlgear - Part 202: High-
voltage/low-voltage prefabricated substation
(IEC 62271-202:2014)
Appareillages à haute tension - Partie 202: Postes Hochspannungs-Schaltgeräte und -Schaltanlagen - Teil
préfabriqués haute tension/basse tension 202: Fabrikfertige Stationen für
(CEI 62271-202:2014) Hochspannung/Niederspannung
(IEC 62271-202:2014)
This European Standard was approved by CENELEC on 2014-05-01. 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 CEN-CENELEC
Management Centre 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 CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2014 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 62271-202:2014 E
Foreword
The text of document 17C/595/FDIS, future edition 2 of IEC 62271-202, prepared by SC 17C
“High-voltage switchgear and controlgear assemblies” of IEC TC 17 “Switchgear and controlgear" was
submitted to the IEC-CENELEC parallel vote and approved by CENELEC as EN 62271-202:2014.

The following dates are fixed:
(dop) 2014-11-01
• latest date by which the document has to be
implemented at national level by
publication of an identical national
standard or by endorsement
• latest date by which the national (dow) 2017-05-01
standards conflicting with the
document have to be withdrawn
This document supersedes EN 62271-202:2007.

EN 62271-202:2007:
a) regarding temperature-rise test an alternative method for liquid filled transformers is (re)introduced
and the temperature-rise test method for dry-type transformers is specified more precisely;
b) testing procedure for short time and peak withstand current tests are specified more precisely;
c) assessment of electromagnetic fields is considered including a type test (optional) according
CLC/TR 62271-208:2010;
d) influence of the product on the environment is considered (Clause 12);
e) internal arc test requirements have been adapted to EN 62271-200:2012 and requirements for the
assessment of pressure relief volumes below the floor / ground has been assigned;
f) the method for defining the load factor in an enclosure for liquid filled transformers is extended with
different temperature rises for the transformer outside the enclosure (Annex DD);
g) for the calculation of the load factor of dry-type transformers in an enclosure the insulation systems
according to EN 60076-1:2011, Tables B.1 and B.2 are worked out in detail.

Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such
patent rights.
Endorsement notice
The text of the International Standard IEC 62271-202:2014 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 60059:1999 NOTE Harmonized as EN 60059:1999.
IEC 60068 (Series) NOTE Harmonized as EN 60068 (Series).
IEC 60076 (Series) NOTE Harmonized as EN 60076 (Series).
IEC 60243-1:2013 NOTE Harmonized as EN 60243-1:2013.
IEC 61936-1:2010 NOTE Harmonized as EN 61936-1:2010.
IEC 62271-4:2013 NOTE Harmonized as EN 62271-4:2013.
IEC/TS 62271-304:2008 NOTE Harmonized as CLC/TS 62271-304:2008.
ISO 1460 NOTE Harmonized as EN ISO 1460.

- 3 - EN 62271-202:2014
ISO 1461 NOTE Harmonized as EN ISO 1461.
ISO 2081 NOTE Harmonized as EN ISO 2081.
ISO 2409 NOTE Harmonized as EN ISO 2409.
ISO 3231:1993 NOTE Harmonized as EN ISO 3231:1997.
ISO 7784 (Series) NOTE Harmonized as EN ISO 7784 (Series).
ISO 9227 NOTE Harmonized as EN ISO 9227.
ISO 10546 NOTE Harmonized as EN ISO 1460.
ISO 11997 (Series) NOTE Harmonized as EN ISO 11997 (Series).
ISO 12944 (Series) NOTE Harmonized as EN ISO 12944 (Series).
ISO 13732-1:2006 NOTE Harmonized as EN ISO 13732-1:2008.

Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
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.
NOTE 1 When an International Publication has been modified by common modifications, indicated by (mod), the relevant

EN/HD applies.
NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available here:
www.cenelec.eu
Publication Year Title EN/HD Year
IEC 60050 series International Electrotechnical Vocabulary - - series
Part 461: Electric cables
IEC 60068-2-75 -  Environmental testing -- Part 2-75: Tests - EN 60068-2-75 -
Test Eh: Hammer tests
IEC 60076-1 2011 Power transformers -- Part 1: General EN 60076-1 2011
IEC 60076-2 2011 Power transformers -- Part 2: Temperature EN 60076-2 2011
rise for liquid-immersed transformers
IEC 60076-3 2013 Power transformers -- Part 3: Insulation EN 60076-3 2013
levels, dielectric tests and external
clearances in air
IEC 60076-5 2006 Power transformers -- Part 5: Ability to EN 60076-5 2006
withstand short circuit
IEC 60076-7 2005 Power transformers -- Part 7: Loading - -
guide for oil-immersed power transformers
IEC 60076-10 2001 Power transformers -- Part 10: EN 60076-10 2001
Determination of sound levels
IEC 60076-11 2004 Power transformers -- Part 11: Dry-type EN 60076-11 2004
transformers
IEC 60076-12 2008 Power transformers -- Part 12: Loading - -
guide for dry-type power transformers
IEC 60076-13 2006 Power transformers -- Part 13: Self- EN 60076-13 2006
protected liquid-filled transformers
IEC 60364-4-41 2005 Low-voltage electrical installations -- Part HD 60364-4-41 2007
(mod) 4-41: Protection for safety - Protection
against electric shock
+HD 60364-4- 2007
41:2007/corrigendu
m Jul. 2007
+AA
IEC 60529 1989 Degrees of protection provided by EN 60529 1991
enclosures (IP Code)
+EN 1993
60529:1991/corrige
ndum May 1993
IEC 60529:1989/A1 1999  EN 60529:1991/A1 2000
IEC 60529:1989/A2 2013  EN 60529:1991/A2 2013
IEC 60664-1 2007 Insulation coordination for equipment EN 60664-1 2007
within low-voltage systems -- Part 1:
Principles, requirements and tests
IEC 60721-1 1990 Classification of environmental conditions - EN 60721-1 1995
- Part 1: Environmental parameters and
their severities
+A1 1992  - -
+A2 1995  +A2 1995
- 5 - EN 62271-202:2014
IEC 60721-2-2 2012 Classification of environmental conditions - EN 60721-2-2 2013
- Part 2-2: Environmental conditions
appearing in nature -- Precipitation and
wind
IEC 60721-2-4 1987 Classification of environmental conditions - HD 478.2.4 S1 1989
- Part 2: Environmental conditions
appearing in nature - Solar radiation and
temperature
+A1 1988  - -
IEC 60947-1 2007 Low-voltage switchgear and controlgear -- EN 60947-1 2007
Part 1: General rules
IEC 61180-1 1992 High-voltage test techniques for low- EN 61180-1 1994
voltage equipment -- Part 1: Definitions,
test and procedure requirements
IEC 61439-1 2011 Low-voltage switchgear and controlgear EN 61439-1 2011
assemblies -- Part 1: General rules
IEC 61439-2 2011 Low-voltage switchgear and controlgear EN 61439-2 2011
assemblies -- Part 2: Power switchgear
and controlgear assemblies
IEC 62262 2002 Degrees of protection provided by EN 62262 2002
enclosures for electrical equipment against
external mechanical impacts (IK code)
IEC 62271-1 2007 High-voltage switchgear and controlgear -- EN 62271-1 2008
Part 1: Common specifications
IEC 62271-200 2011 High-voltage switchgear and controlgear -- EN 62271-200 2012
Part 200: AC metal-enclosed switchgear
and controlgear for rated voltages above 1
kV and up to and including 52 kV
IEC 62271-201 2006 High-voltage switchgear and controlgear -- EN 62271-201 2006
Part 201: AC insulation-enclosed
switchgear and controlgear for rated
voltages above 1 kV and up to and
including 52 kV
+EN 62271- 2006
201:2006/corrigend
um Nov. 2006
IEC 62271-202 2014 High-voltage switchgear and controlgear -- EN 62271-202 2014
Part 202: High-voltage/low-voltage
prefabricated substation
ISO 1052 1982 Steels for general engineering purposes - -
ISO 1182  Reaction to fire tests for products – Non- EN ISO 1182 2010
combustibility test
ISO 1716  Reaction to fire tests for products – EN ISO 1716 2010
Determination of the gross heat of
combustion (calorific value)
ISO 6508-1  Metallic materials -- Rockwell hardness EN ISO 6508-1 2005
test -- Part 1: Test method (scales A, B, C,
D, E, F, G, H, K, N, T)
IEC/TR 62271-208 2009 High-voltage switchgear and controlgear -- CLC/TR 62271-208 2010
Part 208: Methods to quantify the steady
state, power-frequency electromagnetic
fields generated by HV switchgear
assemblies and HV/LV prefabricated
substations
IEC/TR 62271-300 2006 High-voltage switchgear and controlgear - - -
Part 300: Seismic qualification of
alternating current circuit-breakers

IEC/TS 60815-1 2008 Selection and dimensioning of high-voltage - -
insulators intended for use in polluted
conditions - Part 1: Definitions, information
and general principles
ISO/IEC Guide 51 1999 Safety aspects - Guidelines for their - -
inclusion in standards
IEC 62271-202 ®
Edition 2.0 2014-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
High-voltage switchgear and controlgear –

Part 202: High-voltage/low-voltage prefabricated substation

Appareillage à haute tension –

Partie 202: Postes préfabriqués haute tension/basse tension

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX XD
ICS 29.130.10 ISBN 978-2-8322-1483-1

– 2 – IEC 62271-202:2014 © IEC 2014
CONTENTS
FOREWORD . 8
INTRODUCTION . 10
1 General . 11
1.1 Scope . 11
1.2 Normative references . 11
2 Normal and special service conditions . 13
2.1 Normal service conditions . 13
2.1.1 Indoor switchgear and controlgear . 13
2.1.1.101 Low-voltage switchgear and controlgear . 13
2.1.1.102 Transformer . 13
2.1.2 Outdoor switchgear and controlgear . 14
2.2 Special service conditions . 14
2.2.1 Altitude . 14
2.2.2 Pollution . 14
2.2.3 Temperature and humidity . 15
2.2.4 Vibrations, shock or tilting. 15
2.2.5 Wind speed . 15
2.2.6 Other parameters . 15
3 Terms and definitions . 15
4 Ratings . 17
4.1 Rated voltage (U ) . 18
r
4.2 Rated insulation level . 18
4.3 Rated frequency (f ) . 19
r
4.4 Rated normal current and temperature rise . 19
4.4.1 Rated normal current (I ) . 19
r
4.4.2 Temperature rise . 19
4.4.3 Particular points of Table 3 . 19
4.5 Rated short-time withstand current (I ) . 19
k
4.5.101 Rated short-time withstand current of high voltage switchgear
and controlgear and high voltage interconnection (I ) . 20
k
4.5.102 Rated short-time phase to earth withstand current (I ) . 20
ke
4.5.103 Rated short-time withstand currents of low voltage switchgear
and controlgear and low voltage interconnection (I ) . 20
cw
4.6 Rated peak withstand current (I ) . 20
p
4.6.101 Rated peak withstand current (I ) . 20
p
4.6.102 Rated peak phase to earth withstand current (I ) . 20
pe
4.6.103 Rated peak withstand currents of low voltage switchgear and
controlgear and low voltage interconnection (I ) . 20
pk
4.7 Rated durations of short circuit (t ) . 20
k
4.7.101 Rated duration of short circuit (t ) . 21
k
4.7.102 Rated duration of phase to earth short circuit (t ) . 21
ke
4.7.103 Rated duration of short circuits for low voltage switchgear and
controlgear and low voltage interconnection . 21
4.7.104 Rated duration of short circuits for transformers . 21
4.8 Rated supply voltage of closing and opening devices and auxiliary and
control circuits (U ) . 21
a
4.9 Rated supply frequency of closing and opening devices and of auxiliary
circuits . 21

IEC 62271-202:2014 © IEC 2014 – 3 –
4.10 Rated pressure of compressed gas supply for controlled pressure
systems . 21
4.11 Rated filling levels for insulation and/or operation . 21
4.101 Rated maximum power and class of enclosure . 22
4.101.1 Rated maximum power of the prefabricated substation . 22
4.101.2 Rated class of enclosure . 22
4.102 Ratings of the internal arc classification . 22
4.102.1 General . 22
4.102.2 Types of accessibility (A, B, AB) . 22
4.102.3 Rated arc fault currents (I , I ) . 22
A Ae
4.102.4 Rated arc fault duration (t , t ) . 23
A Ae
5 Design and construction . 23
5.1 Requirements for liquids in switchgear and controlgear . 23
5.2 Requirements for gases in switchgear and controlgear . 23
5.3 Earthing of switchgear and controlgear . 24
5.4 Auxiliary and control equipment . 25
5.5 Dependent power operation . 25
5.6 Stored energy operation . 25
5.7 Independent manual or power operation (independent unlatched
operation) . 25
5.8 Operation of releases . 25
5.9 Low- and high-pressure interlocking and monitoring devices . 25
5.10 Nameplates. 25
5.11 Interlocking devices . 25
5.12 Position indication . 26
5.13 Degree of protection provided by enclosures . 26
5.14 Creepage distances for outdoor insulators . 26
5.15 Gas and vacuum tightness . 26
5.16 Liquid tightness . 26
5.17 Fire hazard (flammability) . 26
5.18 Electromagnetic compatibility (EMC) . 26
5.101 Protection of the prefabricated substation against mechanical stress . 26
5.102 Protection of the environment due to internal defects . 27
5.103 Internal arc fault . 27
5.104 Enclosure . 28
5.104.1 General . 28
5.104.2 Fire behaviour . 28
5.104.3 Corrosion . 29
5.104.4 Covers and doors . 30
5.104.5 Ventilation openings . 30
5.104.6 Partitions . 30
5.105 Other provisions. 31
5.105.1 Provisions for dielectric tests on cables . 31
5.105.2 Accessories . 31
5.105.3 Operation aisle . 31
5.105.4 Labels . 31
5.106 Sound emission . 31
5.107 Electromagnetic fields . 31
6 Type tests . 31

– 4 – IEC 62271-202:2014 © IEC 2014
6.1 General . 31
6.1.1 Grouping of tests . 32
6.1.2 Information for identification of specimens . 32
6.1.3 Information to be included in type-test reports . 32
6.2 Dielectric tests . 33
6.2.1 Ambient air conditions during tests . 33
6.2.2 Wet test procedure . 33
6.2.3 Conditions of switchgear and controlgear during dielectric
tests . 33
6.2.4 Criteria to pass the test . 33
6.2.5 Application of the test voltage and test conditions . 33
6.2.6 Tests of switchgear and controlgear of U ≤ 245 kV . 33
r
6.2.7 Tests of switchgear and controlgear of U > 245 kV . 33
r
6.2.8 Artificial pollution tests for outdoor insulators . 33
6.2.9 Partial discharge tests . 33
6.2.10 Dielectric tests on auxiliary and control circuits. . 34
6.2.11 Voltage test as condition check . 34
6.2.101 Tests on the high-voltage interconnection . 34
6.2.102 Tests on low-voltage interconnection . 35
6.3 Radio interference voltage (r.i.v.) test . 36
6.4 Measurement of the resistance of circuits . 36
6.5 Temperature-rise tests . 36
6.5.101 General . 36
6.5.102 Test conditions . 37
6.5.103 Test methods . 38
6.5.104 Measurements . 41
6.5.105 Acceptance criteria . 42
6.6 Short-time withstand current and peak withstand current tests . 43
6.7 Verification of the protection . 43
6.8 Tightness tests . 43
6.9 Electromagnetic compatibility tests (EMC) . 43
6.10 Additional tests on auxiliary and control circuits . 44
6.10.1 General . 44
6.10.2 Functional tests . 44
6.10.3 Electrical continuity of earthed metallic parts test . 44
6.10.4 Verification of the operational characteristics of auxiliary
contacts . 44
6.10.5 Environmental tests . 44
6.10.6 Dielectric test . 44
6.11 X-radiation test procedures for vacuum interrupters . 44
6.101 Calculations and mechanical tests . 44
6.101.1 Wind pressure . 44
6.101.2 Roof loads . 45
6.101.3 Mechanical impacts . 45
6.102 Internal arc test . 45
6.102.1 General . 45
6.102.2 Test conditions . 45
6.102.3 Arrangement of the equipment . 46
6.102.4 Test procedure . 46

IEC 62271-202:2014 © IEC 2014 – 5 –
6.102.5 Criteria to pass the test . 46
6.102.6 Test report . 47
6.102.7 Transferability of tests results . 48
6.103 Measurement or calculation of electromagnetic fields . 48
7 Routine tests . 48
Replacement: . 49
7.101 Dielectric test on the high voltage interconnection. 49
7.102 Voltage withstand tests on auxiliary circuits . 49
7.103 Functional tests . 49
7.104 Verification of correct wiring . 49
7.105 Tests after assembly on site . 49
8 Guide to the selection of prefabricated substation . 49
Replacement: . 49
8.101 General . 49
8.102 Selection of rated values . 50
8.103 Selection of class of enclosure . 50
8.104 Internal arc fault . 50
8.104.1 General . 50
8.104.2 Causes and preventive measures . 51
8.104.3 Supplementary protective measures . 51
8.104.4 Considerations for the selection and installation . 53
8.104.5 Internal arc test . 53
8.104.6 IAC classification . 53
8.105 Summary of technical requirements, ratings and optional tests . 54
9 Information to be given with enquiries, tenders and orders . 58
9.1 Information with enquiries and orders . 58
9.2 Information with tenders . 59
10 Transport, storage, installation, operation, maintenance . 60
10.1 Conditions during transport, storage and installation . 60
10.2 Installation . 60
10.2.1 Unpacking and lifting . 61
10.2.2 Assembly . 61
10.2.3 Mounting . 61
10.2.4 Connections . 61
10.2.5 Final installation inspection . 61
10.2.6 Basic input data by the user . 61
10.2.7 Basic input data by the manufacturer . 61
10.3 Operation . 61
10.4 Maintenance . 62
10.101 Dismantling, recycling and disposal at the end-of-service life . 62
11 Safety . 62
11.101 Electrical aspects . 62
11.102 Mechanical aspects . 62
11.103 Thermal aspects . 62
11.104 Internal arc aspects . 62
12 Influence of the product on the environment . 63
Annex AA (normative) Internal arc fault – Method to verify the internal arc
classification (IAC) . 64

– 6 – IEC 62271-202:2014 © IEC 2014
AA.1 General . 64
AA.2 Room simulation . 64
AA.3 Indicators (for assessing the thermal effects of the gases) . 64
AA.3.1 General . 64
AA.3.2 Arrangement of indicators . 65
AA.4 Tolerances for geometrical dimensions of test arrangements . 66
AA.5 Test parameters . 67
AA.6 Test procedure . 67
Annex BB (normative) Test to verify the sound level of a prefabricated substation . 76
BB.1 Purpose . 76
BB.2 Test specimen . 76
BB.3 Test method . 76
BB.4 Measurements . 76
BB.5 Presentation and calculation of the results . 76
Annex CC (normative) Mechanical impact test . 78
CC.1 Test for the verification of the resistance to mechanical impact . 78
CC.2 Apparatus for the verification of the protection against mechanical
damage. 78
Annex DD (informative)  Rating of transformers in an enclosure . 80
DD.1 General . 80
DD.2 Liquid-filled transformer . 80
DD.3 Dry-type transformer . 81
DD.4 Example. 85
Annex EE (informative) Examples of earthing circuits . 88
Annex FF (informative) Characteristics of enclosure materials . 91
FF.1 Metals . 91
FF.1.1 Coatings . 91
FF.1.2 Paints . 91
FF.2 Concrete . 91
Bibliography . 93

Figure 101 – Measurement of transformer temperature rise in ambient air: ∆t . 37
Figure 102 – Measurement of transformer temperature rise in an enclosure: ∆t . 37
Figure 103 – Diagram of the preferred temperature-rise test method . 39
Figure 104 – Diagram of the alternative temperature-rise test method . 40
Figure 105 – Diagram for open-circuit test . 41
Figure AA.1 – Mounting frame for vertical indicators . 68
Figure AA.2 – Horizontal indicators . 68
Figure AA.3 – Arrangement of indicators . 71
Figure AA.4 – Selection of tests on high voltage switchgear for class IAC-A . 72
Figure AA.5 – Selection of tests on high voltage switchgear for class IAC-B . 73
Figure AA.6 – Selection of tests on high voltage interconnections for class IAC-A . 74
Figure AA.7 – Selection of tests on high voltage interconnections for class IAC-B . 75
Figure CC.1 – Impact test apparatus . 79
Figure DD.1 – Liquid-filled transformer load factor in an enclosure . 81
Figure DD.2 – Dry-type transformer load factor outside of the enclosure . 81

IEC 62271-202:2014 © IEC 2014 – 7 –
Figure DD.3 – Insulation class 105 °C (A) dry-type transformers load factor in an
enclosure . 82
Figure DD.4 – Insulation class 120 °C (E) dry-type transformers load factor in an
enclosure . 82
Figure DD.5 – Insulation class 130 °C (B) dry-type transformers load factor in an
enclosure . 83
Figure DD.6 – Insulation class 155 °C (F) dry-type transformers load factor in an
enclosure . 83
Figure DD.7 – Insulation class 180 °C (H) dry-type transformers load factor in an
enclosure . 84
Figure DD.8 – Insulation class 200 °C (H) dry-type transformers load factor in an
enclosure . 84
Figure DD.9 – Insulation class 220 °C (H) dry-type transformers load factor in an
enclosure . 85
Figure EE.1 – Example of earthing circuits . 88
Figure EE.2 – Example of earthing circuits . 89
Figure EE.3 – Example within the framework serving as the main earthing conductor . 90

Table 101 – Synthetic material characteristics . 29
Table 102 – Locations, causes and examples of measures decreasing the probability
of internal arcs . 52
Table 103 – Single phase-to-earth arc fault current depending on the network neutral
earthing . 54
Table 104 – Summary of technical requirements and ratings for prefabricated
substations (1 of 4) . 55
Table FF.1 – Treatment of coatings . 91
Table FF.2 – Tests of coatings . 91
Table FF.3 – Test of concrete . 92

– 8 – IEC 62271-202:2014 © IEC 2014
INTERNATIONAL ELECTROTECHNICAL COMMISSION
_____________
HIGH-VOLTAGE SWITCHGEAR AND CONTROLGEAR –

Part 202: High-voltage/low-voltage prefabricated substation

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