1、 PUBLICLY AVAILABLE SPECIFICATION IEC PAS 62072Pre-Standard First edition2005-01 Natural graphite brush for rotating electrical machinery Basic characteristics Reference number IEC/PAS 62072:2005(E)LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUP
2、PLY BUREAU.Publication numbering As from 1 January 1997 all IEC publications are issued with a designation in the 60000 series.For example,IEC 34-1 is now referred to as IEC 60034-1.Consolidated editions The IEC is now publishing consolidated versions of its publications.For example,edition numbers
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8、+41 22 919 03 00 LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.PUBLICLY AVAILABLE SPECIFICATIONIEC PAS 62072Pre-Standard First edition2005-01 Natural graphite brush for rotating electrical machinery Basic characteristics PRICE CODE I
9、EC 2005 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 permission in writing from the publisher.International Electrotechnical Commission,3,rue de Varemb,PO Box
10、131,CH-1211 Geneva 20,SwitzerlandTelephone:+41 22 919 02 11 Telefax:+41 22 919 03 00 E-mail:inmailiec.ch Web:www.iec.ch M For price,see current catalogue Commission Electrotechnique InternationaleInternational Electrotechnical Commission LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT
11、 THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.2 PAS 62072 IEC:2005(E)CONTENTS FOREWORD.3 1 Scope.4 2 Normative references.4 3 Terms and definitions.4 4 Classification.4 5 Characteristics.5 5.1 Physical properties.5 5.1.1 Bulk density.5 5.1.2 Hardness.5 5.1.3 Resistivity.5 5.1.4 Bending strength
12、.5 5.1.5 Ash.5 5.2 Operating characteristics.5 5.2.1 Total voltage drop.5 5.2.2 Coefficient of friction.5 5.3 Recommended operating conditions.6 5.3.1 Peripheral velocity.6 5.3.2 Current density.6 5.3.3 Brush pressure.6 6 Test methods.8 Annex A(informative)Measurements and performance characteristic
13、s.9 Annex B(informative)Manufacture process of the different brushes.10 Annex C(informative)Comparison of physical properties.11 Annex D(informative)Environmental pollution.12 LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.PAS 62072 I
14、EC:2005(E)3 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ NATURAL GRAPHITE BRUSH FOR ROTATING ELECTRICAL MACHINERY BASIC CHARACTERISTICS FOREWORD 1)The International Electrotechnical Commission(IEC)is a worldwide organization for standardization comprising all national electrotechnical committees(IEC
15、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,Publicl
16、y 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 ag
