EN 62271-212:2017

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Visokonapetostne stikalne in krmilne naprave - 212. del: Kompaktni sestavi opreme za distribucijske podpostaje (CEADS) (IEC 62271-212:2016)Appareillage à haute tension - Partie 212: Ensemble Compact d'Équipement pour Postes de Distribution (ECEPD) (IEC 62271-212:2016)High-voltage switchgear and controlgear - Part 212: Compact Equipment Assemblies for Distribution Substation (CEADS) (IEC 62271-212:2016)29.130.10Visokonapetostne stikalne in krmilne napraveHigh voltage switchgear and controlgearICS:Ta slovenski standard je istoveten z:EN 62271-212:2017SIST EN 62271-212:2017en01-april-2017SIST EN 62271-212:2017SLOVENSKI
STANDARDSIST EN 50532:20101DGRPHãþD

EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 62271-212
January 2017 ICS 29.130.10
Supersedes
EN 50532:2010
English Version
High-voltage switchgear and controlgear -
Part 212: Compact Equipment Assembly for Distribution Substation (CEADS) (IEC 62271-212:2016)
Appareillage à haute tension - Partie 212: Ensemble Compact d'Equipement pour Postes de Distribution (ECEPD) (IEC 62271-212:2016)
Hochspannungs-Schaltgeräte und -Schaltanlagen -
Teil 212: Kompakte Gerätekombinationen für Verteilstationen (CEADS) (IEC 62271-212:2016) This European Standard was approved by CENELEC on 2016-11-30. 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, Serbia, 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 © 2017 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 62271-212:2017 E SIST EN 62271-212:2017

The following dates are fixed: • latest date by which the document has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2017-08-30 • latest date by which the national standards conflicting with the document have to be withdrawn (dow) 2019-11-30
This document supersedes EN 50532:2010.
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 62271-212:2016 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 (not modified). IEC 60076-13:2006 NOTE Harmonized as EN 60076-13:2006 (not modified). IEC 61936-1:2010 NOTE Harmonized as EN 61936-1:2010 (modified). IEC 62271-4:2013 NOTE Harmonized as EN 62271-4:2013 (not modified). IEC/TR 62271-208:2009 NOTE Harmonized as IEC/TR 62271-208:2010 (not modified). SIST EN 62271-212:2017

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 60050-441 1984
International Electrotechnical Vocabulary (IEV) - Chapter 441: Switchgear, controlgear and fuses - -
IEC 60050-461 2008
International Electrotechnical Vocabulary - Part 461: Electric cables - -
IEC 60076 Series
Power transformers EN 60076 Series
IEC 60076-1 2011
Power transformers - Part 1: General EN 60076-1 2011
IEC 60076-2 2011
Power transformers - Part 2: Temperature rise for liquid-immersed transformers EN 60076-2 2011
IEC 60076-3 2013
Power transformers - Part 3: Insulation levels, dielectric tests and external clearances in air EN 60076-3 2013
IEC 60076-5 2006
Power transformers - Part 5: Ability to withstand short circuit EN 60076-5 2006
IEC 60076-7 - Power transformers - Part 7: Loading guide for oil-immersed power transformers - -
IEC 60076-10 2016
Power transformers - Part 10: Determination of sound levels EN 60076-10 2016
IEC 60076-11 2004
Power transformers - Part 11: Dry-type transformers EN 60076-11 2004
IEC 60076-12 2008
Power transformers - Part 12: Loading guide for dry-type power transformers - -
IEC 60076-15 2015
Power transformers - Part 15: Gas-filled power transformers - -
IEC 60243-1 2013
Electric strength of insulating materials - Test methods - Part 1: Tests at power frequencies EN 60243-1 2013
IEC 60364-4-41 (mod) 2005
Low-voltage electrical installations -
Part 4-41: Protection for safety - Protection against electric shock HD 60364-4-41 corr. July 2007
2007 IEC 60529 1989
Degrees of protection provided by enclosures (IP Code) EN 60529 + corr. May 1991 1993 SIST EN 62271-212:2017

IEC 60664-1 2007
Insulation coordination for equipment within low-voltage systems -
Part 1: Principles, requirements and tests EN 60664-1 2007
IEC 60721-1 1990
Classification of environmental conditions - Part 1: Environmental parameters and their severities EN 60721-1 1995
IEC 60721-2-2 2012
Classification of environmental conditions - Part 2-2: Environmental conditions appearing in nature - Precipitation and wind EN 60721-2-2 2013
IEC 60721-2-4 1987
Classification of environmental conditions - Part 2: Environmental conditions appearing in nature - Solar radiation and temperature HD 478.2.4 S1 1989
IEC/TS 60815 Series
Selection and dimensioning of high-voltage insulators intended for use in polluted conditions - - IEC 60947-1 2007
Low-voltage switchgear and controlgear - Part 1: General rules EN 60947-1 2007
IEC 61439 Series
Low-voltage switchgear and controlgear assemblies EN 61439 Series IEC 61439-1 2011
Low-voltage switchgear and controlgear assemblies - Part 1: General rules EN 61439-1 2011
IEC 62262 2002
Degrees of protection provided by enclosures for electrical equipment against external mechanical impacts (IK code) EN 62262 2002
IEC 62271-1 2007
High-voltage switchgear and controlgear - Part 1: Common specifications EN 62271-1 2008
+A1 2011
+A1 2011
IEC 62271-200 2011
High-voltage switchgear and controlgear - Part 200: AC metal-enclosed switchgear and controlgear for rated voltages above
1 kV and up to and including 52 kV EN 62271-200 2012
IEC 62271-201 2014
High-voltage switchgear and controlgear - Part 201: AC solid-insulation enclosed switchgear and controlgear for rated voltages above 1 kV and up to and including 52 kV EN 62271-201 2014
IEC 62271-202 2014
High-voltage switchgear and controlgear - Part 202: High-voltage/low-voltage prefabricated substation EN 62271-202 +AC 2014
2014 ISO/IEC Guide 51 2014
Safety aspects - Guidelines for their inclusion in standards - -
IEC 62271-212 Edition 1.0 2016-10 INTERNATIONAL STANDARD NORME INTERNATIONALE High-voltage switchgear and controlgear –
Part 212: Compact Equipment Assembly for Distribution Substation (CEADS)
Appareillage à haute tension –
Partie 212: Ensemble Compact d'Equipement pour Postes de Distribution (ECEPD)
INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE
ICS 29.130.10
ISBN 978-2-8322-3633-8
– 2 – IEC 62271-212:2016 © IEC 2016 CONTENTS FOREWORD . 7 INTRODUCTION . 9 1 General . 10 1.1 Scope . 10 1.2 Normative references . 10 2 Normal and special service conditions . 12 2.1 Normal service conditions . 12 2.2 Special service conditions . 12 3 Terms and definitions . 12 4 Ratings . 14 4.1 Rated voltage . 14 4.2 Rated insulation level . 15 4.3 Rated frequency (fr) . 15 4.4 Rated normal current and temperature rise . 15 4.4.1 Rated normal current (Ir ,InA) . 15 4.4.2 Temperature rise . 15 4.5 Rated short-time withstand currents (Ik, Ike, Icw) . 16 4.5.101 Rated short-time phase to phase and rated short-time phase to earth withstand currents of high-voltage functional unit and rated short-time withstand current of high-voltage interconnection (Ik, Ike) . 16 4.5.102 Rated short-time withstand currents of low-voltage functional unit and low-voltage interconnection (Icw). 16 4.5.103 Short-time withstand currents of high-voltage/low-voltage transformer functional unit . 16 4.6 Rated peak withstand currents (Ip, Ipe, Ipk) . 16 4.6.101 Rated peak phase to phase and rated peak phase to earth withstand currents of high-voltage functional unit and rated peak withstand current of high-voltage interconnection (Ip, Ipe) . 16 4.6.102 Rated peak withstand currents of low-voltage and low-voltage interconnection (Ipk) . 17 4.6.103 Peak withstand currents of high-voltage/low-voltage transformer functional unit . 17 4.7 Rated durations of short circuit (tk, tke, tcw) . 17 4.7.101 Rated duration of phase to phase short circuit (tk) and rated duration of phase to earth short circuit (tke) of high-voltage functional unit and rated duration of short-circuit of high-voltage interconnection . 17 4.7.102 Rated duration of short circuit (tcw) for low-voltage functional unit and low-voltage interconnection . 17 4.7.103 Duration of short circuit for high-voltage/low-voltage transformer functional unit . 17 4.8 Rated supply voltage of closing and opening devices and of auxiliary and control circuits . 17 4.9 Rated supply frequency of closing and opening devices and of auxiliary circuits . 17 4.101 Rated power and total losses of CEADS . 18 4.102 Ratings of the internal arc classification (IAC) . 18 4.102.1 General . 18 4.102.2 Types of accessibility (A, B, AB) . 18 4.102.3 Classified sides . 18 SIST EN 62271-212:2017

IEC 62271-212:2016 © IEC 2016 – 3 – 4.102.4 Rated arc fault currents (IA, IAe) . 18 4.102.5 Rated arc fault duration (tA, tAe) . 19 5 Design and construction . 19 5.1 Requirements for liquids in switchgear and controlgear . 19 5.2 Requirements for gases in switchgear and controlgear . 20 5.3 Earthing of switchgear and controlgear . 20 5.4 Auxiliary and control equipment . 20 5.5 Dependent power operation . 20 5.6 Stored energy operation . 21 5.7 Independent manual or power operation (independent unlatched operation) . 21 5.8 Operation of releases . 21 5.9 Low- and high-pressure interlocking and monitoring devices . 21 5.10 Nameplates. 21 5.11 Interlocking devices . 21 5.12 Position indication . 21 5.13 Degrees of protection provided by enclosures . 21 5.14 Creepage distances for outdoor insulators . 22 5.15 Gas and vacuum tightness . 22 5.16 Liquid tightness . 22 5.17 Fire hazard (flammability) . 22 5.18 Electromagnetic compatibility (EMC) . 22 5.19 X-ray emission . 22 5.20 Corrosion . 23 5.101 Protection against mechanical stresses . 23 5.102 Protection of the environment due to internal defects . 23 5.103 Internal arc fault . 23 5.104 Enclosures . 24 5.105 Sound emission . 24 5.106 Electromagnetic fields . 24 6 Type tests . 24 6.1 General . 24 6.1.1 Grouping of tests . 25 6.1.2 Information for identification of test objects . 25 6.1.3 Information to be included in type-test reports . 25 6.2 Dielectric tests . 26 6.2.1 General . 26 6.2.2 Dielectric tests on the high-voltage interconnection . 26 6.2.3 Dielectric tests on the low-voltage interconnection . 27 6.2.4 Dielectric tests on high-voltage functional unit . 28 6.2.5 Dielectric tests on high-voltage/low-voltage transformer functional unit . 28 6.2.6 Dielectric tests on low-voltage functional unit . 28 6.2.7 Partial discharge test . 29 6.3 Radio interference voltage (r.i.v) test . 29 6.4 Measurement of the resistance of circuits . 29 6.5 Temperature-rise tests . 29 6.5.1 General . 29 6.5.2 Test conditions . 29 6.5.3 Test methods . 30 SIST EN 62271-212:2017

– 4 – IEC 62271-212:2016 © IEC 2016 6.5.4 Special case of dry-type high-voltage/low-voltage transformer functional unit . 33 6.5.5 Measurements . 33 6.6 Short-time withstand current and peak withstand current tests . 35 6.6.1 Short-time and peak withstand current tests on main circuit of high-voltage and low-voltage functional units . 35 6.6.2 Short-time and peak withstand current tests on high-voltage and low-voltage interconnections . 35 6.6.3 Short-time and peak withstand current tests on earthing circuits . 35 6.6.4 Short-time and peak withstand current tests on high-voltage/low-voltage transformer functional unit . 36 6.7 Verification of the protection, . 36 6.7.1 Verification of degree of protection (IP coding) . 36 6.7.2 Verification of resistance to mechanical impacts (IK coding) . 36 6.8 Tightness tests . 36 6.9 Electromagnetic compatibility tests (EMC) . 36 6.10 Additional tests on auxiliary and control circuits . 36 6.10.1 General . 36 6.10.2 Functional tests . 37 6.10.3 Electrical continuity of earthed metallic parts test . 37 6.10.4 Verification of the operational characteristics of auxiliary contacts . 37 6.10.5 Environmental tests . 37 6.10.6 Dielectric test . 37 6.11 X-radiation test procedure for vacuum interrupters . 37 6.101 Internal arc test . 37 6.101.1 General . 37 6.101.2 Test conditions . 38 6.101.3 Arrangement of the equipment . 38 6.101.4 Test procedure . 39 6.101.5 Criteria to pass the test . 39 6.101.6 Test report . 39 6.101.7 Extension of validity of test results . 40 6.102 Verification of making and breaking capacities . 40 6.103 Mechanical operation tests . 40 6.104 Mechanical stability test . 40 6.105 Pressure withstand test for gas-filled compartments. 40 6.106 Measurements of leakage currents of non-metallic enclosures . 41 6.107 Weatherproofing test . 41 6.108 Tightness and mechanical strength for liquid filled compartments . 41 6.109 Measurement or calculation of electromagnetic fields . 41 7 Routine tests . 42 7.1 Dielectric tests on the main circuit . 42 7.1.1 General . 42 7.1.2 Dielectric tests on high-voltage functional unit . 42 7.1.3 Dielectric tests on high-voltage/low-voltage transformer functional unit and high-voltage interconnection . 43 7.1.4 Dielectric tests on low-voltage functional unit and low-voltage interconnection . 43 7.2 Tests on auxiliary and control circuits . 43 7.3 Measurement of the resistance of the main circuit . 43 SIST EN 62271-212:2017

IEC 62271-212:2016 © IEC 2016 – 5 – 7.4 Tightness test . 43 7.5 Design and visual checks . 43 7.101 Mechanical operation tests on high-voltage functional unit . 43 7.102 Pressure tests of gas-filled compartments . 43 7.103 Tests of auxiliary electrical, pneumatic and hydraulic devices . 44 7.104 Measurement of the resistance of the windings . 44 7.105 Measurement of the voltage ratio . 44 7.106 Measurement of the short circuit impedance and load losses . 44 7.107 Measurement of no-load losses and current . 44 7.108 Inspection of the low-voltage functional unit, including inspection of wiring and, if necessary, electrical operation test . 44 7.109 Checking of protective measures and of the electrical continuity of the protective circuits of the low-voltage functional unit . 44 7.110 Tests after assembly on site . 44 8 Guide to the selection of CEADS . 44 8.1 Selection of rated values . 45 8.2 Continuous or temporary overload due to changed service conditions . 45 8.101 Selection of internal arc classification . 45 8.102 Information . 47 9 Information to be given with enquiries, tenders and orders . 51 9.1 Information with enquiries and orders . 51 9.2 Information with tenders . 52 10 Rules for transport, installation, operation and maintenance . 52 10.1 Conditions during transport, storage and installation . 53 10.2 Installation . 53 10.2.1 Unpacking and lifting . 53 10.2.2 Assembly . 53 10.2.3 Mounting . 53 10.2.4 Final installation inspection . 53 10.3 Operation . 53 10.4 Maintenance . 54 10.5 Dismantling, recycling and disposal at the end of service life . 54 11 Safety . 54 11.101 Electrical aspects . 54 11.102 Mechanical aspects . 54 11.103 Thermal aspects . 54 11.104 Internal arc aspects . 54 12 Influence of the product on the environment . 54 Annex AA (normative)
Method for testing CEADS under conditions of arcing due to an internal arc fault . 56 AA.1 General . 56 AA.2 Room simulation . 56 AA.3 Indicators (for assessing the thermal effects of the gases) . 56 AA.3.1 General . 56 AA.3.2 Arrangement of indicators . 57 AA.4 Tolerances for geometrical dimensions of test arrangements . 58 AA.5 Test parameters . 58 AA.6 Test procedure . 58 AA.7 Designation of the internal arc classification . 59 SIST EN 62271-212:2017

– 6 – IEC 62271-212:2016 © IEC 2016 Annex BB (normative)
Test to verify the sound level of a CEADS . 68 BB.1 Purpose . 68 BB.2 Test object . 68 BB.3 Test method . 68 BB.4 Measurements . 68 BB.5 Presentation and calculation of the results . 68 Annex CC (informative)
Types and application of CEADS . 69 CC.1 Type of CEADS . 69 CC.1.1 General . 69 CC.1.2 CEADS-G . 69 CC.1.3 CEADS-A . 69 CC.1.4 CEADS-I . 69 CC.2 Application of CEADS . 69 Bibliography . 73
Figure 1 – Test diagram in case of type tested high-voltage functional unit . 31 Figure 2 – Test diagram in case of non-type tested high-voltage functional unit . 31 Figure 3 – Alternative diagram in case of type tested high-voltage functional unit . 32 Figure 4 – Diagram for the open-circuit test . 33 Figure AA.1 – Mounting frame for vertical indicators . 60 Figure AA.2 – Horizontal indicators . 60 Figure AA.3 – Protection of operators in front of classified side(s) of CEADS . 61 Figure AA.4 – Protection of general public around the CEADS . 61 Figure AA.5 – Protection of operators in front of classified side(s) of CEADS having a pressure relief volume below the floor . 62 Figure AA.6 – Protection of general public around the CEADS having a pressure relief volume below the floor . 63 Figure AA.7 – Selection of tests on high-voltage switchgear for class IAC-A . 64 Figure AA.8 – Selection of tests on high-voltage switchgear for class IAC-B . 65 Figure AA.9 – Selection of tests on high-voltage interconnection for class IAC-A . 66 Figure AA.10 – Selection of tests on high-voltage interconnection for class IAC-B . 67 Figure CC.1 – Application of CEADS . 70 Figure CC.2 – CEADS Type G . 71 Figure CC.3 – CEADS Type A . 71 Figure CC.4 – CEADS Type I . 72
Table 1 – Locations, causes and examples of measures decreasing the probability of internal arc faults . 45 Table 2 – Examples of measures limiting the consequences of internal arc faults . 46 Table 3 – Summary of technical requirements, ratings for CEADS – Service conditions . 47 Table 4 – Summary of technical requirements, ratings for CEADS –
Ratings of the CEADS . 48 Table 5 – Summary of technical requirements, ratings for CEADS –
Design and construction of the CEADS . 50
IEC 62271-212:2016 © IEC 2016 – 7 – INTERNATIONAL ELECTROTECHNICAL COMMISSION ____________
HIGH-VOLTAGE SWITCHGEAR AND CONTROLGEAR –
Part 212: Compact Equipment Assembly
for Distribution Substation (CEADS)
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 itself does not provide any attestation of conformity. Independent certification bodies provide conformity assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any services carried out by independent certification bodies. 6) All users should ensure that they have the latest edition of this publication. 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 62271-212 has been prepared by subcommittee 17C: Assemblies, of IEC technical committee 17: High-voltage switchgear and controlgear. The text of this standard is based on the following documents: FDIS Report on voting 17C/645/FDIS 17C/650/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. SIST EN 62271-212:2017

– 8 – IEC 62271-212:2016 © IEC 2016 This International Standard should be read in conjunction with IEC 62271-1:2007, to which it refers and which is applicable unless otherwise specified. In order to simplify the indication of corresponding requirements, the same numbering of clauses and subclauses is used as in IEC 62271-1. Amendments to these clauses and subclauses are given under the same numbering, whilst additional subclauses, are numbered from 101. A list of all parts of the IEC 62271 series can be found, under the general title High-voltage switchgear and controlgear, on the IEC website. The committee has decided that the contents of this publication will remain unchanged until the stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to the specific publication. At this date, the publication will be
• reconfirmed, • withdrawn, • replaced by a revised edition, or • amended.
IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates that it contains colours which are considered to be useful for the correct understanding of its contents. Users should therefore print this document using a colour printer.
IEC 62271-212:2016 © IEC 2016 – 9 – INTRODUCTION Traditionally a high-voltage/low-voltage distribution substation has been constructed by installing the main electrical components –high-voltage switchgear, distribution transformer(s) and the corresponding low-voltage distribution panel(s)- within a closed electrical operating area. It can be a room within a building intended for other (non electrical uses) or a separated housing (prefabricated or not) designed specifically to contain the electrical equipment of the substation or an open area limited by fences. Some years ago in the search for a more standardized and compact substation, the concept of prefabricated substation was developed. IEC 62271-202 covers this type of substation. According to this document, the main electrical components (high-voltage switchgear, transformer and low-voltage switchgear) are fully in compliance with their respective product standard, and the whole substation, including interconnections and enclosure is designed and type tested and later manufactured and routine tested in the factory. Correspondingly the quality of the substation is assured by the manufacturer. Moreover, also other types of assemblies have been introduced in the market. These are assemblies comprising the main electrical active components of the substation and their interconnections, delivered as a single product. The product can therefore be type tested, manufactured, routine tested in the factory, transported and then installed in a closed electrical operating area. This type of factory assembled and type-tested product is covered by this document receiving the generic name CEADS from Compact Equipment Assembly for Distribution Substation. Numerous arrangements are possible and this document provides guidance on basic types of assemblies, which might be envisaged. A CEADS is not covered by IEC 61936-1. However CEADS is intended to become part of a distribution substation. Taking into account the closer proximity of the components that even can share some parts (enclosure, solid or fluid insulation…) it is very relevant to pay attention to the potential interaction between them. Therefore to cover CEADS is neither sufficient nor always applicable to refer to the relevant product standards. This document covers any additional design and construction requirements and test methods applicable to the different types of CEADS. In addition to the specified characteristics, particular attention has been paid to the specification concerning the protection of persons, both operators and general public. The CEADS is also for the interest of committee TC 14: Power transformers, and committee TC 121: Switchgear and controlgear and their assemblies for low voltage.
– 10 – IEC 62271-212:2016 © IEC 2016 HIGH-VOLTAGE SWITCHGEAR AND CONTROLGEAR –
Part 212: Compact Equipment Assembly
for Distribution Substation (CEADS)
1 General 1.1 Scope This part of IEC 62271 specifies the service conditions, rated characteristics, general structural requirements and test methods of the assemblies of the main electrical functional units of a high-voltage/low-voltage distribution substation, duly interconnected, for alternating current of rated operating voltages above 1 kV and up to and including 52 kV on the high-voltage side, service frequency 50 Hz or 60 Hz. This assembly is to be cable-connected to the network, and intended for installation within an indoor or outdoor c
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