GUIDE INTERNATIONAL ELECTROTECHNICAL 111 COMMISSION Second edition 2004-07 Electrical high-voltage equipment in high-voltage substations Common recommendations for product standards IEC Referencenumber IEC Guide111:2004(E) Copyright Ihte mational Eke ctrotechnical Commiss ion ser=Wing, Bemk Copyriht hlerationalEkectrtechniva Commis ion No re productic a or networking pemited without license from HS INTERNATIONAL GUIDE ELECTROTECHNICAL 111 COMMISSION Second edition 2004-07 Electrical high-voltage equipment in high-voltage substations - Commonrecommendations for product standards IEC 2004- Copyright - all rights reserved No part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permis sion in writing from the publis her. International Electrotechnical Commission, 3, rue de Varembe, PO Box 131, CH-1211 Geneva 20, Switzerland Telephone: +41 22 919 02 11± Telefax: +41 22 919 03 00± E-mail: [email protected] Web: www.iec.ch S IEO PRICECODE Commission Electrotechnique Internationale International Electrotechnical Commission MexayHapoaHas3nekTpoTexHyeckag KomwcCWs Forprice, see curenf cafalogue Copyricht hlemational Ekectrotechnical Comms ion User=Wing, Bemk No re productis tworking pemitted without lice nse from IHS Guide 111@IEC:2004(E) 2 CONTENTS FOREWORD. INTRODUCTION. Scope. 2 Referencedocuments. 3 Guidance for the"Normative references" clause in product standards. 8 4 Guidance forthe"Definitions"clause in product standards 8 Environmental conditions.. .8 5 5.1 General... 5.2 Normal environmental conditions. 5.3 Special environmental conditions. Ratings. 6 6.1 General... 11 6.2 Highest voltage for equipment.. 6.3 Rated insulation levels.. 6.4 Rated frequency ... 12 6.5 Rated current ... 12 6.6 Rated short-time withstand current.. 12 6.7 Rated peak withstand current.... 12 6.8 Rated duration of short circuit .... 13 6.9 Rated supply voltage of auxiliary and control circuits ... 13 6.10 Rated supplyfrequency of auxiliaryand control circuits 13 Design and construction.. 7 7.1 Requirements for liquids and gases in equipment. 13 7.2 Earthing of equipment..... 14 7.3 Low-voltage part of equipment... 14 7.4 Marking ... 7.5 Degrees of protection byenclosures ... 7.6 Creepage distances.... 15 7.7 Fire hazard .... 15 7.8 Noise level.. 15 7.9 Electromagnetic compatibility (EMC) 15 7.10 Mechanical stresses onterminals 16 7.11 Interfaces 8 Tests 8.1 General 16 8.2 Typetests 17 8.3 Routine tests ... 8.4 Special tests... 8.5 Sample tests .. 8.6 Commissioning tests.. 18 Rules for transport, storage, erection, operation and maintenance 9 19 license from IHS Guide 111 @IEC:2004(E) -3- 10 Safety. 19 10.1 General.. 10.2 Electrical aspects 19 10.3Mechanicalaspects. 19 10.4Thermalaspects.. 10.5 Operation aspects.. 19 11 Effects of productstandards on thenatural environment 20 12 Guide forthe selectionof equipment accordingto use. 20 13 Information to be given with enquiries,tenders and orders .. .20 AnnexA Identification oftest specimens .21 Table 1 - Normal environmental conditions . .9 Table2-Special environmental conditions .10 Table 3 - DC supply voltage.. Table 4-Auxiliary contact classes. 14 Table A.1-List of drawings to be submitted by manufacturer. .21 Guide111 @ IEC:2004(E) - 4- INTERNATIONALELECTROTECHNICALCOMMISSION ELECTRICALHIGH-VOLTAGE EQUIPMENT INHIGH-VOLTAGESUBSTATIONS COMMONRECOMMENDATIONSFORPRODUCTSTANDARDS FOREWORD This second edition of IEC Guide 111has been prepared in accordance with Annex Aof Part 1 of theISO/lEC Directives byanad hocgroup of the Standardization Management Board setup to harmonize characteristics for substation standards. It constitutes a technical revision of the first edition, published in 1998. This edition has been amended to express more clearly the guidance being provided to product committees and contains corrected and completed technical material and references. The text of this guide is based on the followi