IEC INTERNATIONAL STANDARD 60112 Fourth edition 2003-01 BASICSAFETYPUBLICATION Method for the determination of the proof and the comparative tracking indices of solid insulating materials This English-language version is derived from the original bilingual publication by leaving out all French-language pages. Missing page numbers correspond to the French- language pages. EC Reference number IEC 60112:2003(E) EC DUCTION Publication numbering As from 1 January 1997 all IEC publications are issued with a designation in the 60000 series.For example,IEC34-1is now referred to asIEC 60034-1. Consolidatededitions The IEc is now publishing consolidated versions of its publications. For example, publication incorporating amendment 1 and the base publication incorporating amendments 1 and 2. Further information on IEC publications The technical content of IEC publications is kept under constant review by the IEC, thus ensuring that the content reflects current technology. Information relating to this publication, including its validity, is available in the IEc Catalogue of publications (see below) in addition to new editions,amendments and corrigenda.Information on the subjects under consideration and work in progress undertaken by the technical committee which has prepared this publication,as well as the list of publications issued, is also available from the following: IEC Web Site (www.iec.ch) Catalogue of IEC publications The on-line catalogue on the IEC web site (www.iec.ch/searchpub) enables you to search by a variety of criteria including text searches, technical committees and date of publication. On-line information is also available on recently issued publications,withdrawn and replaced publications,as well as corrigenda. IEC Just Published This summary of recently issued publications (www.iec.ch/online news/ justpub) is also available by email. Please contact the Customer Service Centre (see below) for further information. CustomerServiceCentre If you have any questions regarding this publication or need further assistance, pleasecontacttheCustomer Service Centre: Email: [email protected] Tel: +4122 9190211 Fax: +41229190300 THIS DOCUMENT HAS BEEN SUPPLIEDUNDER LICENSE IEC DFORFURTHERPUBLICATIONRE PRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM IEC IEC INTERNATIONAL STANDARD 60112 Fourth edition 2003-01 BASIC SAFETY PUBLICATION Method for the determination of the proof and the comparative tracking indices of solid insulating materials @ IEC 2003 Copyright - all rights reserved No part of this publication may be reproduced or utlized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the publisher. 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 R Commission Electrotechnique Internationale PRICE CODE E International Electrotechnical Commission MexAyHapoAHan nekTpoTexHuyeckan KoMuccug Forprice,see currentcatalogue THIS DOCUMENT HAS BEEN SUPPLIED UNDERLICENSE IEC ODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM IEC 60112@IEC:2003 3 CONTENTS FOREWORD. 5 Scope 9 2 Normative references 3 Terms and definitions.. 11 4 Principle 13 5 Test specimen 13 6 Test specimen conditioning. 15 6.1 Environmental conditioning.. 15 6.2 Test specimen surface state.. 15 Test apparatus. 7.1 Electrodes. 7.2 Test circuit 17 7.3 Test solutions. 17 7.4 Dropping device 19 7.5 Test specimen support platform 19 7.6 Electrode assembly installation 19 8 Basic test procedure .21 8.1 General 21 8.2 Preparation 21 8.3 Test procedure 9 Determination of erosion. .23 10 Determination of proof tracking index (PTI) 23 10.1 Procedure 23 10.2 Report... .25 11 Determination of comparative tracking index (CTl) 25 11.1 General.. ..25 11.2 Determination of the 100 drop point. .25 11.3 Determination of the maximum 50 drop withstand voltage 11.4 Report..