SIST EN 62271-202:2007

High-voltage switchgear and controlgear -- Part 202: High voltage/low voltage prefabricated substation

This part of IEC 62271 specifies the service conditions, rated characteristics, general structural requirements and test methods of HV/LV or LV/HV prefabricated substations, which are cable-connected, to be operated from inside (walk-in type) or outside (non-walk-in type) for alternating current of rated voltages above 1 kV and up to and including 52 kV on the HV side, and for one or more transformers for service frequencies up to and including 60 Hz for outdoor installation in locations with public accessibility. Prefabricated substations can be situated at ground level or partially or completely below ground level. In general, a prefabricated substation comprises the following main components (functions): - enclosure; - power transformers; - HV and LV switchgear and controlgear; - HV and LV interconnections; - auxiliary equipment and circuits. However, relevant provisions of this standard are applicable to designs where not all these components exist (for example, an installation consisting of power transformer and LV switchgear).

Hochspannungs-Schaltgeräte und -Schaltanlagen - Teil 202: Fabrikfertige Stationen für Hochspannung/Niederspannung

Appareillage à haute tension -- Partie 202: Postes préfabriqués haute tension/basse tension

La présente Norme Internationale prescrit les conditions de service, les caractéristiques assignées, les exigences structurelles générales, et les méthodes d'essai applicables aux postes préfabriqués HT/BT ou BT/HT qui sont connectés par câble, pour être man uvrés de l'intérieur (à aire de man uvre) ou de l'extérieur (sans aire de man uvre), pour courant alternatif de tensions assignées supérieures à 1 kV et inférieures ou égales à 52 kV côté HT, pour un ou plusieurs transformateurs, pour des fréquences de service inférieures ou égales à 60 Hz et pour installation à l'extérieur, dans des endroits accessibles au public.

Visokonapetosne stikalne naparave- 202. del: Montažna električna postaja (IEC 62271-202:2006)

General Information

• Status: Withdrawn
• Publication Date: 09-Oct-2007
• Withdrawal Date: 12-Jun-2017
• ICS: 29.130.10 - High voltage switchgear and controlgear
• Technical Committee: SKA - Switchgear and control gear
• Current Stage: 9900 - Withdrawal (Adopted Project)
• Start Date: 13-Jun-2017
• Due Date: 06-Jul-2017
• Completion Date: 13-Jun-2017
• Ref Project: EN 62271-202:2007 - High-voltage switchgear and controlgear - Part 202: High voltage/low voltage prefabricated substation

Relations

• Replaced By: SIST EN 62271-202:2014 - High-voltage switchgear and controlgear - Part 202: High voltage/low voltage prefabricated substation
• Effective Date: 28-Jan-2023
• Replaced By: SIST EN 62271-202:2014 - High-voltage switchgear and controlgear - Part 202: High voltage/low voltage prefabricated substation
• Effective Date: 07-Jun-2022
• Revised: SIST EN 61330:2001 - High-voltage/low-voltage prefabricated substations
• Effective Date: 13-May-2010
• Replaces: SIST EN 61330:2001 - High-voltage/low-voltage prefabricated substations
• Effective Date: 28-Jan-2023
• Replaces: SIST EN 61330:2001 - High-voltage/low-voltage prefabricated substations
• Effective Date: 07-Jun-2022

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN 62271-202:2007
01-november-2007
9LVRNRQDSHWRVQHVWLNDOQHQDSDUDYHGHO0RQWDåQDHOHNWULþQDSRVWDMD,(&

High-voltage switchgear ands controlgear -- Part 202: High voltage/low voltage
prefabricated substation (IEC 62271-202:2006)
Hochspannungs-Schaltgeräte und -Schaltanlagen - Teil 202: Fabrikfertige Stationen für
Hochspannung/Niederspannung (IEC 62271-202:2006)
Appareillage a haute tension -- Partie 202: Postes préfabriqués haute tension/basse
tension (IEC 62271-202:2006)
Ta slovenski standard je istoveten z: EN 62271-202:2007
ICS:
29.130.10 Visokonapetostne stikalne in High voltage switchgear and
krmilne naprave controlgear
SIST EN 62271-202:2007 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------

EUROPEAN STANDARD
EN 62271-202

NORME EUROPÉENNE
February 2007
EUROPÄISCHE NORM

ICS 29.130.10 Supersedes EN 61330:1996


English version


High-voltage switchgear and controlgear -
Part 202: High voltage/low voltage prefabricated substation
(IEC 62271-202:2006)


Appareillage à haute tension -  Hochspannungs-Schaltgeräte
Partie 202: Postes préfabriqués und -Schaltanlagen -
haute tension/basse tension Teil 202: Fabrikfertige Stationen
(CEI 62271-202:2006) für Hochspannung/Niederspannung
(IEC 62271-202:2006)




This European Standard was approved by CENELEC on 2006-09-01. 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


© 2007 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 62271-202:2007 E

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EN 62271-202:2007 - 2 -
Foreword
The text of document 17C/371/FDIS, future edition 1 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 was approved by CENELEC as EN 62271-202 on
2006-09-01.
This European Standard supersedes EN 61330:1996.
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) 2007-09-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2009-09-01
Annexes ZA and ZB have been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 62271-202:2006 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 60076-5 NOTE  Harmonized as EN 60076-5:2006 (not modified).
IEC 60243-1 NOTE  Harmonized as EN 60243-1:1998 (not modified).
IEC 60947-1 NOTE  Harmonized as EN 60947-1:2004 (not modified).
ISO 3231 NOTE  Harmonized as EN ISO 3231:1997 (not modified).
__________

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- 3 - EN 62271-202:2007
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

IEC 60076 Series Power transformers EN 60076 Series


1) 2)
IEC 60076-1 - Power transformers - EN 60076-1 1997
Part 1: General + A11 1997
+ A12 2002


1) 2)
IEC 60076-2 - Power transformers - EN 60076-2 1997
Part 2: Temperature rise


1) 2)
IEC 60076-5 - Power transformers - EN 60076-5 2006
Part 5: Ability to withstand short circuit


1) 2)
IEC 60076-10 - Power transformers - EN 60076-10 2001
Part 10: Determination of sound levels


1) 2)
IEC 60076-11 - Power transformers - EN 60076-11 2004
Part 11: Dry-type transformers


1) 2)
IEC 60364-4-41 - Low-voltage electrical installations - HD 60364-4-41 2007
Part 4-41: Protection for safety - Protection
against electric shock


1) 2)
IEC 60439-1 - Low-voltage switchgear and controlgear EN 60439-1 1999
assemblies -
Part 1: Type-tested and partially type-tested
assemblies


3) 1)
IEC 60466 - AC insulation-enclosed switchgear and - -
controlgear for rated voltages above 1 kV and
up to and including 38 kV


1) 2)
IEC 60529 - Degrees of protection provided by enclosures EN 60529 1991
(IP Code) + corr. May 1993


1) 2)
IEC 60664-1 - Insulation coordination for equipment within EN 60664-1 2003
low-voltage systems -
Part 1: Principles, requirements and tests


1) 2)
IEC 60694 - Common specifications for high-voltage EN 60694 1996
switchgear and controlgear standards + corr. May 1999



1)
Undated reference.
2)
Valid edition at date of issue.
3)
IEC 60466 is superseded by IEC 62271-201:2006; which is harmonized as EN 62271-201:2006.

---------------------- Page: 4 ----------------------

EN 62271-202:2007 - 4 -
Publication Year Title EN/HD Year
1) 2)
IEC 60721-1 - Classification of environmental conditions - EN 60721-1 1995
Part 1: Environmental parameters and their
severities


1) 2)
IEC 60721-2-2 - Classification of environmental conditions - HD 478.2.2 S1 1990
Part 2: Environmental conditions appearing in
nature - Precipitation and wind


1) 2)
IEC 60721-2-4 - Classification of environmental conditions -- HD 478.2.4 S1 1989
Part 2: Environmental conditions appearing in
nature -- Solar radiation and temperature


1)
IEC 60815 - Guide for the selection of insulators in respect - -
of polluted conditions


1)
IEC 60905 - Loading guide for dry-type power - -
transformers


1) 2)
IEC 61166 - High-voltage alternating current circuit- EN 61166 1993
breakers - Guide for seismic qualification of
high-voltage alternating current circuit-
breakers


1) 2)
IEC 61180-1 - High-voltage test techniques for low-voltage EN 61180-1 1994
equipment - Part 1: Definitions, test and
procedure requirements


1)
IEC 61936-1 - Power installations exceeding 1kV a.c. - - -
Part 1: Common rules


1) 2)
IEC 62262 - Degrees of protection provided by enclosures EN 62262 2002
for electrical equipment against external
mechanical impacts (IK code)


1) 2)
IEC 62271-200 - High-voltage switchgear and controlgear - EN 62271-200 2004
Part 200: AC metal-enclosed switchgear and
controlgear for rated voltages above 1 kV and
up to and including 52 kV


1)
ISO/IEC Guide 51 - Safety aspects - Guidelines for their inclusion - -
in standards


1)
ISO 1052 - Steels for general engineering purposes - -


1) 2)
ISO 1182 - Reaction to fire tests for building products - EN ISO 1182 2002
Non-combustibility test


1) 2)
ISO 1716 - Reaction to fire tests for building products - EN ISO 1716 2002
Determination of the heat of combustion


1) 2)
ISO 6508-1 - Metallic materials - Rockwell hardness test - EN ISO 6508-1 2005
Part 1: Test method (scales A, B, C, D, E, F,
G, H, K, N, T)

---------------------- Page: 5 ----------------------

- 5 - EN 62271-202:2007
Annex ZB
(informative)

A-deviations
A-deviation: National deviation due to regulations, the alteration of which is for the time being outside the
competence of the CENELEC national member.
This European Standard does not fall under any Directive of the EC.
In the relevant CENELEC countries these A-deviations are valid instead of the provisions of the European
Standard until they have been removed.
Clause Deviation
5.1 Belgium
(Wiring rules: Règlement Général sur les Installations Electriques, R.G.I.E. § 71 et 72.02)
2
The cross-section of conductor shall be not less than 25 mm .
__________

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NORME CEI
INTERNATIONALE
IEC



62271-202
INTERNATIONAL


Première édition
STANDARD

First edition

2006-06


Appareillage à haute tension –
Partie 202:
Postes préfabriqués haute tension/
basse tension

High-voltage switchgear and controlgear –
Part 202:
High-voltage/low-voltage prefabricated
substation

 IEC 2006 Droits de reproduction réservés  Copyright - all rights reserved
Aucune partie de cette publication ne peut être reproduite ni No part of this publication may be reproduced or utilized in any
utilisée sous quelque forme que ce soit et par aucun procédé, form or by any means, electronic or mechanical, including
électronique ou mécanique, y compris la photocopie et les photocopying and microfilm, without permission in writing from
microfilms, sans l'accord écrit de l'éditeur. the publisher.
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Telephone: [phone] Telefax: [phone] E-mail: [e-mail] Web: www.iec.ch
CODE PRIX
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PRICE CODE
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Pour prix, voir catalogue en vigueur
For price, see current catalogue

---------------------- Page: 7 ----------------------

62271-202  IEC:2006 – 3 –
CONTENTS
FOREWORD.9
INTRODUCTION.13

1 General .15
1.1 Scope.15
1.2 Normative references .15
1.3 Terms and definitions .19
2 Service conditions .21
2.1 Normal service conditions .21
2.2 Special service conditions .23
3 Requirements for components .25
4 Ratings.25
4.1 Rated voltages .27
4.2 Rated insulation levels .27
4.3 Rated frequency and number of phases .27
4.4 Rated normal currents and temperature rise.27
4.5 Rated short-time withstand currents .29
4.6 Rated peak withstand currents .29
4.7 Rated duration of short circuit .29
4.8 Rated supply voltage of closing and opening devices and auxiliary and
control circuits.29
4.9 Rated supply frequency of closing and opening devices and auxiliary and
control circuits.29
4.10 Rated maximum power and class of enclosure .29
4.10.1 Rated maximum power of the prefabricated substation .29
4.10.2 Rated class of enclosure .31
5 Design and construction .31
5.1 Earthing .31
5.2 Auxiliary equipment .33
5.3 Nameplate.33
5.4 Degree of protection and internal fault.33
5.5 Enclosure .37
5.6 Other provisions .43
5.7 Sound emission.43
5.8 Electromagnetic compatibility (EMC) .43
6 Type tests .43
6.1 General .43
6.2 Dielectric tests .45
6.3 Temperature-rise tests .51
6.4 Short-time and peak withstand current tests on main and earthing circuits .57
6.5 Functional tests.57
6.6 Verification of the degree of protection .57
6.7 Calculations and mechanical tests.57
6.8 Internal arcing test .59
6.9 Electromagnetic compatibility test (EMC) .59

---------------------- Page: 8 ----------------------

62271-202  IEC:2006 – 5 –
7 Routine tests .59
7.1 Dielectric test on the HV interconnection .61
7.2 Voltage withstand tests on auxiliary circuits.61
7.3 Functional tests.61
7.4 Verification of correct wiring .61
7.5 Tests after assembly on site.61
8 Guide to the selection of prefabricated substations for service .61
8.1 Selection of rated values .61
8.2 Selection of class of enclosure .63
8.3 Selection of internal arc classification.63
8.4 Information.69
9 Information to be given with enquiries, tenders and orders .77
9.1 Information with enquiries and orders .77
9.2 Information with tenders .79
10 Rules for transport, installation, operation, maintenance and end-of-service life .81
10.1 Conditions during transport, storage and installation .81
10.2 Installation .81
10.3 Operation .83
10.4 Maintenance.83
10.5 Dismantling, recycling and disposal at the end-of-service life .83
11 Safety.83
11.1 Electrical aspects .85
11.2 Mechanical aspects.85
11.3 Thermal aspects.85

Annex A (normative) Method for testing the prefabricated substation under conditions
of arcing due to an internal fault.89
Annex B (normative) Test to verify the sound level of a prefabricated substation .115
Annex C (normative)  Mechanical impact test .119
Annex D (informative)  Rating of transformers in an enclosure.123
Annex E (informative) Examples of earthing circuits.129
Annex F (informative) Characteristics of enclosure materials .135

Bibliography.139

Figure 1 – Measurement of transformer temperature rise in ambient air: ∆t
1
(refer to 6.3) .85
Figure 2 – Measurement of transformer temperature rise in an enclosure: ∆t
2
(refer to 6.3) .87
Figure 3 – Diagram of the temperature-rise test (refer to 6.3.2).87
Figure A.1 – Mounting frame for vertical indicators .103
Figure A.2 – Horizontal indicators .103
Figure A.3 – Arrangement of indicators.105
Figure A.4 – Selection of tests on HV switchgear for class IAC-A.107

---------------------- Page: 9 ----------------------

62271-202  IEC:2006 – 7 –
Figure A.5 – Selection of tests on HV switchgear for class IAC-B.109
Figure A.6 – Selection of tests on HV interconnections for class IAC-A.111
Figure A.7 – Selection of tests on HV interconnections for class IAC-B.113
Figure C.1 – Impact test apparatus .121
Figure D.1 – Liquid-filled transformer load factor in an enclosure.123
Figure D.2 – Dry-type transformer load factor in an enclosure.125
Figure E.1 – Example of earthing circuits.129
Figure E.2 – Example of earthing circuits.131
Figure E.3 – Example within the framework serving as the main earthing conductor .133

Table 1 – Synthetic material characteristics .39
Table 2 – Locations, causes and examples of measures decreasing the probability of
internal arcs.65
Table 3 – Examples of measures limiting the consequences of internal arcs .67
Table 4 – Summary of technical requirements and ratings for prefabricated
substations .69

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62271-202  IEC:2006 – 9 –
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
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 62271-202 has been prepared by subcommittee 17C: High-voltage
switchgear and controlgear assemblies, of IEC technical committee 17: Switchgear and
controlgear.
The text of this standard is based on the following documents:
FDIS Report on voting
17C/371/FDIS 17C/375/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.

---------------------- Page: 11 ----------------------

62271-202  IEC:2006 – 11 –
The following standards belong to the same IEC 62271 series, under the general title High-
voltage switchgear and controlgear:
Part 200: AC metal-enclosed switchgear and controlgear for rate voltages above 1 kV and
up to and including 53 kV
Part 201: AC insulation-enclosed switchgear and controlgear for rated voltages above 1 kV
and up to and including 52 kV
Part 203: Gas-insulated metal-enclosed switchgear for rated voltages above 52 kV
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: 12 ----------------------

62271-202  IEC:2006 – 13 –
INTRODUCTION
Prefabricated substations are defined as a type-tested assembly comprising an enclosure
containing transformers, low-voltage and high-voltage switchgear, connections and auxiliary
equipment to supply low-voltage energy from a high-voltage system or vice versa. These
substations are in locations accessible to the public and should ensure protection to persons
according to the specified service conditions.
This means that, in addition to the specified characteristics, ratings and relevant test
procedures, particular attention has been paid to the specification concerning the protection
of persons, both operators and general public. Use of type-tested components and suitable
design and construction of the enclosure ensure this protection. The correct design and
performance of the prefabricated substation are verified by means of relevant type tests
described in this standard, including internal arc tests.

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62271-202  IEC:2006 – 15 –
HIGH-VOLTAGE SWITCHGEAR AND CONTROLGEAR –

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



1 General
1.1 Scope
This part of IEC 62271 specifies the service conditions, rated characteristics, general
structural requirements and test methods of HV/LV or LV/HV prefabricated substations, which
are cable-connected, to be operated from inside (walk-in type) or outside (non-walk-in type)
for alternating current of rated voltages above 1 kV and up to and including 52 kV on the HV
side, and for one or more transformers for service frequencies up to and including 60 Hz for
outdoor installation in locations with public accessibility.
Prefabricated substations can be situated at ground level or partially or completely below
ground level.
In general, a prefabricated substation comprises the following main components (functions):
– enclosure;
– power transformers;
– HV and LV switchgear and controlgear;
– HV and LV interconnections;
– auxiliary equipment and circuits.
However, relevant provisions of this standard are applicable to designs where not all these
components exist (for example, an installation consisting of power transformer and LV
switchgear).
NOTE Non-prefabricated substations should comply with the applicable requirements of IEC 61936-1.
1.2 Normative references
The following referenced documents are indispensable for the application of this document.
For dat
...