IEEE 1523-2002 en Guide for the Application Maintenance and Evaluation of Room Temperature Vulcanizing (RTV) Silicone Rubber Coatings for Outdoor Ceramic Insula.pdf

1、IEEE Std 1523-2002IEEE Standards1523TMIEEE Guide for the Application,Maintenance, and Evaluation of RoomTemperature Vulcanizing (RTV) Silicone Rubber Coatings for OutdoorCeramic InsulatorsPublished by The Institute of Electrical and Electronics Engineers, Inc.3 Park Avenue, New York, NY 10016-5997,

2、USA14 March 2003IEEE Dielectrics and Electrical Insulation SocietySponsored by theOutdoor Service Environment CommitteeIEEE StandardsPrint: SH95070PDF: SS95070The Institute of Electrical and Electronics Engineers, Inc.3 Park Avenue, New York, NY 10016-5997, USACopyright 2003 by the Institute of Elec

3、trical and Electronics Engineers, Inc.All rights reserved. Published 14 March 2003. Printed in the United States of America.Print: ISBN 0-7381-3505-4 SH95070PDF: ISBN 0-7381-3506-2 SS95070No part of this publication may be reproduced in any form, in an electronic retrieval system or otherwise, witho

4、ut the prior written permission of the publisher.IEEE Std 1523-2002 (R2008)IEEE Guide for the Application, Maintenance, and Evaluation of Room Temperature Vulcanizing (RTV) Silicone Rubber Coatings for Outdoor Ceramic InsulatorsSponsorOutdoor Service Environment Committeeof theIEEE Dielectrics and E

5、lectrical Insulation SocietyReaffirmed 27 March 2008Approved 11 December 2002IEEE-SA Standards BoardAbstract: Various important aspects that are needed for satisfactory long-term performance ofHigh-Voltage Insulator Coatings (HVIC) are presented in this guide. Various possible applicationscenarios,

6、maintenance issues on coated insulators, factors affecting long-term performance, thequestion of aging, laboratory accelerated tests, and functional outdoor evaluation are described.Keywords: aging, evaluation, hydrophobicity, HVICIEEE Standards documents are developed within the IEEE Societies and

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23、ts attention.Copyright 2003 IEEE. All rights reserved. iiiIntroductionThis introduction is not part of IEEE Std 1523-2002, IEEE Guide for the Application, Maintenance, and Evaluation ofRoom Temperature Vulcanizing (RTV) Silicone Rubber Coatings for Outdoor Ceramic Insulators.The problem of outdoor i

24、nsulator flashover due to contamination has existed as long as outdoor insulationitself. Insulator flashovers result in power outages that are expensive and hence undesirable. It was under-stood that in order to prevent flashover, the leakage current must be minimized. Room temperature vulcan(RTV) c

25、oatings minimize leakage current by preventing water filming on the insulator surface.The use of RTV coatings began on a trial basis since the 1970s. Large-scale application of the coatingsbegan in the 1980s. User experience of RTV coatings has been highly successful. But it must be mentionedthat fo

26、r any specific application, judgment and experience are required to analyze and balance the manycharacteristics, which are discussed to obtain satisfactory performance and reliability.The work toward this guide began in the early 1990s. Round robin tests were performed in several laborato-ries. Conc

27、urrently, input regarding user experience was solicited.IEEE Std 957TM-1995adeals with some aspects of RTV coatings. This guide aspires to provide more detailsand information on the subject of RTV coatings.ParticipantsAt the time this guide was completed, the Outdoor Service Environment Committee S-

28、32-3 had the follow-ing membership:R. S. Gorur, ChairThe following members of the balloting committee voted on this guide. Balloters may have voted forapproval, disapproval, or abstention. aInformation on references can be found in Clause 2.T. BiakekE. A. CherneyJ. GoudieR. HarmonR. HartingsJ. Hoche

29、imerT. OrbeckD. SheadR. TayR. WagnerAnthony BakerThomas BarnesSudhakar CherukupalliRobert ChristmanTommy CooperRonald DaubertRandall DotsonFranklin EmeryGary EngmannMarcel FortinEdward Horgan, Jr.Donald LairdAlbert LivshitzGregory LuriKeith MalmedalWilliam McDermidSusan McNellyPeter MeyerKarl Morten

30、senCarlos PeixotoJames RuggieriMichael SharpThomas SpitzerBrian StoryChuan-Hsier WuGary MichelPeter Wongiv Copyright 2003 IEEE. All rights reserved.When the IEEE-SA Standards Board approved this guide on 11 December 2002, it had the followingmembership:James T. Carlo, ChairJames H. Gurney, Vice Chai

31、rJudith Gorman, Secretary*Member EmeritusAlso included is the following nonvoting IEEE-SA Standards Board liaison:Alan Cookson, NIST RepresentativeSatish K. Aggarwal, NRC RepresentativeSavoula AmanatidisIEEE Standards Managing EditorSid BennettH. Stephen BergerClyde R. CampRichard DeBlasioHarold E.

32、EpsteinJulian Forster*Howard M. FrazierToshio FukudaArnold M. GreenspanJames H. GurneyRaymond HapemanDonald M. HeirmanRichard H. HulettLowell G. JohnsonJoseph L. Koepfinger*Peter H. LipsNader MehravariDaleep C. MohlaWillaim J. MoylanMalcolm V. ThadenGeoffrey O. ThompsonHoward L. WolfmanDon WrightCop

33、yright 2003 IEEE. All rights reserved. vContents1. Overview 11.1 Scope 11.2 Purpose. 11.3 Applications. 12. References 23. Definitions . 24. Background 35. Types of RTV coatings 36. Application guidelines . 46.1 Application on deenergized equipment or lines 46.2 Application on energized equipment an

34、d lines 56.3 Safety and handling . 66.4 Worker protection 66.5 Fire hazard . 66.6 Quality control after application 67. Factors that affect coating life . 77.1 Corona 87.2 Reversion . 88. Field inspection 89. Recoating . 910. Practical considerations in the application of RTV coatings to insulators

35、9Annex A (normative) Hydrophobicity classification guide 11Annex B (informative) Bibliography 18Copyright 2003 IEEE. All rights reserved. 1IEEE Guide for the Application, Maintenance, and Evaluation of Room Temperature Vulcanizing (RTV) Silicone Rubber Coatings for Outdoor Ceramic Insulators1. Overv

36、iew1.1 ScopeThis guide is based on the knowledge and experience of manufacturers, users, and researchers of room tem-perature vulcanizing (RTV) silicone rubber coatings that are used to improve the contamination performanceof outdoor high-voltage (HV) insulators. This guide discusses various importa

37、nt aspects that are needed forsatisfactory long-term performance of high-voltage insulator coatings (HVIC)namely, various possibleapplication scenarios, maintenance issues on coated insulators, factors affecting long-term performance, thequestion of aging, laboratory accelerated tests, and functiona

38、l outdoor evaluation. However, it must be men-tioned that for any specific application, judgment, and experience are required to analyze and balance themany characteristics, which are discussed to obtain satisfactory performance and reliability.1.2 PurposeThis guide is intended for the use of RTV co

39、atings on ceramic and glass insulators.1.3 ApplicationsThis guide is specific enough to be applicable to porcelain and glass insulators in stations as well as trans-mission and distribution lines.RTV coatings are also in use for mitigating animal-induced outages in stations. The coatings used, and t

40、heimportant aspects, may be different than those used for insulator contamination performance improvement.The manufacturer should be consulted prior to use of HV insulator coatings for animal protection.IEEEStd 1523-2002 IEEE GUIDE FOR THE APPLICATION, MAINTENANCE, AND EVALUATION OF ROOM2 Copyright

41、2003 IEEE. All rights reserved.2. ReferencesThis guide should be used in conjunction with the following publications. When the following publicationsare superseded by an approved revision, the revision shall apply.ASTM D 149-1997, Standard Test Method for Dielectric Breakdown Voltage and Dielectric

42、Strength ofSolid Electrical Insulating Materials at Commercial Power Frequencies.1ASTM D 150-1998, Standard Test Methods for AC Loss Characteristics and Permittivity (Dielectric Con-stant) of Solid Electrical Insulation.ASTM D 257-1999, Standard Test Method for DC Resistance or Conductance of Insula

43、ting Materials.ASTM D 495-1999, Standard Test Method for High-Voltage, Low-Current, Dry Arc Resistance of SolidElectrical Insulation.ASTM D 2132-1998, Standard Test Method for Dust-and-Fog Tracking and Erosion Resistance of ElectricalInsulating Materials.ASTM D 2303-1997, Standard Test Methods for L

44、iquid-Contaminant, Inclined-Plane Tracking and Erosionof Insulating Materials.IEEE Std 957TM-1995, Guide for Cleaning Insulators.2,33. DefinitionsFor the purposes of this guide, the following terms and definitions apply. IEEE 100TM, The AuthoritativeDictionary of IEEE Standards Terms, Seventh Editio

45、n B24should be referenced for terms not defined inthis clause.3.1 erosion: An irreversible and nonconducting degradation of the RTV coating that occurs by loss of mate-rial. This can be uniform or localized. Shallow surface traces can occur on coatings. (See IEC 611109-1992B1.)3.2 hydrolysis: Depoly

46、merization of the material due to the interaction of the ions of water.3.3 room temperature vulcanizing silicone rubber: A silicone elastomer formed by vulcanization at roomtemperature of a liquid silicone polymer.3.4 tracking: An irreversible degradation by formation of paths starting and developin

47、g on the surface ofthe RTV coating. These paths can be conductive even under dry conditions. Tracking can occur on surfacesin contact with air and on the interfaces between different insulating materials. (See IEC 611109-1992 B1.)1ASTM publications are available from the American Society for Testing

48、 and Materials, 100 Barr Harbor Drive, West Conshohocken,PA 19428-2959, USA (http:/www.astm.org/).2The IEEE standards or products referred to in this clause are trademarks of the Institute of Electrical and Electronics Engineers, Inc.3IEEE publications are available from the Institute of Electrical

49、and Electronics Engineers, 445 Hoes Lane, P.O. Box 1331, Piscataway,NJ 08855-1331, USA (http:/standards.ieee.org/).4The numbers in brackets correspond with those in the bibliography in Annex B.IEEETEMPERATURE VULCANIZING (RTV) SILICONE RUBBER COATINGS FOR OUTDOOR CERAMIC INSULATORS Std 1523-2002Copyright 2003 IEEE. All rights reserved. 34. BackgroundThe problem of outdoor insulator flashover due to contamination has existed as long as outdoor insulation.Insulator flashovers result in power outages that are expensive and hence undesirable. For example, a 250 msoutag