1、IEEE Guide for the Application of Surge-Protective Components in Surge Protective Devices and Equipment PortsPart 1: Gas Discharge Tubes (GDTs)IEEE Std C62.42.1-2016IEEE Power and Energy SocietySponsored by the Surge Protective Devices CommitteeIEEE3 Park AvenueNew York, NY 10016-5997USAIEEE Std C62
2、.42.1-2016IEEE Guide for the Application of Surge-Protective Components in Surge Protective Devices and Equipment PortsPart 1: Gas Discharge Tubes (GDTs)Sponsor Surge Protective Devices Committee of the IEEE Power and Energy SocietyApproved 22 September 2016IEEE-SA Standards BoardAbstract: Covered i
3、n the IEEE C62.42 guide series are surge protective components (SPCs) used in power and telecom surge protective devices (SPDs) and equipment ports. Covered in this stan-dard on gas discharge tube (GDT) technology SPCs are the following: component construction, characteristics, ratings, and applicat
4、ion examples. The application examples are given in two in-formative annexes covering: basic circuits and protection circuits specific to communications, local area networks, high frequency feeds, and industrial services.Keywords: arc region, back-up air-gap device, breakdown, capacitance, discharge
5、, follow current, gas discharge tube, GDT, glow region, holdover voltage, IEEE C62.42.1, insulation resistance, sparkover, three-electrode, two-electrodeThe Institute of Electrical and Electronics Engineers, Inc.3 Park Avenue, New York, NY 10016-5997, USACopyright 2016 by The Institute of Electrical
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35、 2016 IEEE. All rights reserved.ParticipantsAt the time this IEEE guide was completed, the 3.6.3 Low Voltage Surge Protective Components Application Guide Working Group had the following membership:Michael Maytum, ChairWilliam Travis, Vice ChairTim ArdleyRobert AshtonNisar ChaudhryLeonard DrewesErni
36、e GalloAlbert MartinWolfgang OertelThe following members of the individual balloting committee voted on this guide. Balloters may have voted for approval, disapproval, or abstention.Robert AshtonFrank BascianoWilliam BloetheWilliam BushSuresh ChannarasappaChuanyou DaiGary DonnerDouglas DorrRandall D
37、otsonDoaa GalalRandall GrovesSteven HensleyRaymond HillRonald HotchkissYuri KhersonskyChad KigerJoseph L. KoepfingerPaul LindemulderGreg LuriAlbert MartinMichael MaytumWilliam McBrideMichael NewmanNick S. A. NikjooWolfgang OertelLorraine PaddenPercy PoolMichael RobertsThomas RozekHamid SharifniaJame
38、s SmithGary StoedterDavid TepenJames TimperleyDonald TurnerJohn VergisMatthew WakehamKenneth WhiteJames WilsonWhen the IEEE-SA Standards Board approved this guide on 22 September 2016, it had the following membership:Jean-Philippe Faure, ChairTed Burse, Vice ChairJohn Kulick, Past ChairKonstantinos
39、Karachalios, SecretaryChuck AdamsMasayuki AriyoshiStephen DukesJianbin FanJ. Travis GriffithGary HoffmanRonald W. HotchkissMichael JanezicJoseph L. Koepfinger*Hung LingKevin LuAnnette D. ReillyGary RobinsonMehmet UlemaYingli WenPhilip WinstonHoward WolfmanDon WrightYu YuanDaidi Zhong*Member Emeritus
40、7Copyright 2016 IEEE. All rights reserved.IntroductionThis introduction is not part of IEEE Std C62.42.12016, IEEE Guide for the Application of Surge-Protective Compo-nents in Surge Protective Devices and Equipment PortsPart 1: Gas Discharge Tubes (GDTs).Gas discharge tubes consist of two or more me
41、tal electrodes separated by a small gap and held by a ceramic or glass cylinder. The cylinder is filled with a noble gas mixture, which sparks over into a glow discharge and fi-nally an arc condition when sufficient surge current is available. Because of their switching action and rugged constructio
42、n, gas tubes exceed other voltage limiting surge protective components in current-carrying capabil-ity. Many gas tubes intended for telecommunication applications can easily carry surge currents as high as 10 kA, 8/20; further, depending on design and size of the gas tube, surge current values of 10
43、0 kA, 8/20 can be achieved. The construction of gas discharge tubes is such that they have very low capacitance, generally less than 2 pF. This low capacitance means that GDTs are extensively used in modern broadband communications systems.This standard describes GDT construction, their voltage-curr
44、ent characteristics, characteristic properties, rat-ings, and circuit examples. Figures and circuit performance values reprinted in Annex C are with permission from Phoenix Contact GmbH and Co. KG, Catalog 6: Surge Protection and Power Supply Units 2013/2014, 2013.8Copyright 2016 IEEE. All rights re
45、served.Contents1. Overview . 111.1 Scope 112. Normative references 113. Definitions, graphical symbols, and acronyms 123.1 Definitions 123.2 Graphical symbols 123.3 Acronyms .134. Component construction .145. Characteristics .165.1 GDT sparkover voltage 165.2 GDT glow voltage 185.3 GDT arc voltage .
46、185.4 GDT dc holdover voltage .185.5 GDT capacitance 195.6 GDT oscillation 196. Ratings 196.1 GDT surge current capability196.2 AC discharge current test 206.3 Alternative follow current test 21Annex A (informative) Bibliography 22Annex B (informative) Basic application circuits 23Annex C (informati
47、ve) Examples of GDT circuits for specific network applications. 32Annex D (informative) Air-gaps . 439Copyright 2016 IEEE. All rights reserved.List of FiguresFigure 1Two-electrode (a) and three-electrode (b) GDT symbols 13Figure 2MOV symbol 13Figure 3PN junction diodes; rectifier (a), unidirectional
48、 breakdown (b), bidirectional breakdown (c), reverse blocking thyristor (d), and reverse conducting thyristor (e) symbols .13Figure 4“See-through” view of a surface mount two-electrode GDT .14Figure 5“See-through” view of a leaded three-electrode GDT .15Figure 6Typical GDT volt-ampere characteristic
49、 .16Figure 7Example of fast dv/dt sparkover voltage variation with dc sparkover voltage .17Figure 8350 V GDT dc sparkover voltage variation with repetitive surging .18Figure 9GDT oscillation traces .20Figure B.13-electrode and 2-electrode GDT operation 23Figure B.2Primary protector and modem . 24Figure B.3GDT ground bonding during surge 24Figure B.4Modem “pass under” interface design to avoid 600 V ac current conduction 25Figure B.5Parallel GDT-MOV hybrid 26Figure B.6Series GDT-MOV hybrid 27Figure B.7Three-electrode GDT with a common thermal switch
