1、IEEE Guide for Low-Voltage AC (635 V and below) Power Circuit Breakers Applied with Separately-Mounted Current-Limiting FusesIEEE Std C37.27-2015(Revision of IEEE Std C37.27-2008)IEEE Power and Energy SocietySponsored by the Switchgear CommitteeIEEE3 Park AvenueNew York, NY 10016-5997USAIEEE Std C37
2、27-2015(Revision of IEEE Std C37.27-2008)IEEE Guide for Low-Voltage AC (635 V and below) Power Circuit Breakers Applied with Separately-Mounted Current-Limiting FusesSponsor Switchgear Committee of the IEEE Power and Energy SocietyApproved 5 December 2015IEEE-SA Standards BoardAbstract: Application
3、 recommendations to assist in selection of separately mounted current-lim-iting fuses to be installed in series with low-voltage ac power circuit breakers are provided in this guide.Keywords: circuit breaker, current-limiting fuse, IEEE C37.27, low-voltage ac power circuit breaker, open-fuse trip de
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33、ty. Further information may be obtained from the IEEE Standards Association.6Copyright 2016 IEEE. All rights reserved.ParticipantsAt the time this IEEE guide was completed, the C37.27 Working Group had the following membership:Keith Flowers, ChairClint CarneDavid DunneThomas HawkinsHarry JostenJohn
34、KaminskiCharles A. MorseDarryl MoserT. W. OlsenPaul SullivanThe following members of the individual balloting committee voted on this guide. Balloters may have voted for approval, disapproval, or abstention.Thomas BarnesRobert BeaversWilliam BloetheTed BurseThomas CallsenPaul CardinalGlenn DavisGary
35、 DonnerJerry EarlDouglas J EdwardsKeith FlowersFrank GerleveDavid GilmerMietek GlinkowskiLou GrahorRandall GrovesAjit GwalThomas HawkinsJeffrey HelzerJeffrey HidakaDan HrncirRichard JacksonAnurag JivananiHarry JostenYuri KhersonskyBoris KoganJim KulchiskyEd LarsenFrank MayleJeffery MizenerCharles A.
36、 MorseDarryl MoserJerry MurphyDennis NeitzelMichael NewmanT. W. OlsenLorraine PaddenShawn PattersonChristopher PetrolaIulian ProfirMichael RobertsTimothy RobirdsCharles RogersTim RohrerThomas RozekSteven SanoBartien SayogoMichael SigmonJeremy SmithJerry SmithWayne StecPaul SullivanDavid TepenJames V
37、an De LigtJohn VergisLarry YonceJian YuWhen the IEEE-SA Standards Board approved this guide on 5 December 2015, it had the following membership:John D. Kulick, ChairJon Walter Rosdahl, Vice ChairRichard H. Hulett, Past ChairKonstantinos Karachalios, SecretaryMasayuki AriyoshiTed BurseStephen DukesJe
38、an-Philippe FaureJ. Travis GriffithGary HoffmanMichael JanezicJoseph L. Koepfinger*David J. LawHung LingAndrew MylesT. W. OlsenGlenn ParsonsRonald C. PetersenAnnette D. ReillyStephen J. ShellhammerAdrian P. StephensYatin TrivediPhillip WinstonDon WrightYu YuanDaidi Zhong*Member Emeritus7Copyright 20
39、16 IEEE. All rights reserved.IntroductionThis introduction is not part of IEEE Std C37.27-2015, IEEE Guide for Low-Voltage AC (635 V and below) Power Circuit Breakers Applied with Separately-Mounted Current-Limiting Fuses.IEEE Std C37.27-2008 revised IEEE Std C37.27-1987 to address the following iss
40、ues:a) Modification of all dimensional information to provide metric dimensions,b) General revision for harmonization with related standards,c) General revision for current products and applications including details associated with electronic and electromechanical trip devices, andd) Clarification
41、of the differences between low-voltage nonintegrally fused circuit breakers (covered by IEEE Std C37.13)1and low-voltage ac power circuit breakers with separately mounted fuses.Nonintegrally fused circuit breaker construction is not the same as separately mounted fuses construction. The previous tit
42、le of IEEE Std C37.27-1987 included the reference to nonintegrally fused power circuit breakers. This reference is removed from the 2008 revision and only the reference to separately mounted fuses is used to clarify this construction difference and the applicability of this guide only to low-voltage
43、 AC power circuit breaker using separately mounted current-limiting fuses.While this document is intended as a guide for application of fuses in low-voltage ac power circuit break-ers with separately mounted current-limiting fuses, the guide may also be useful as an application guide for low-voltage
44、 integrally or nonintegrally fused power circuit breakers.The present revision updates the references to preferred ratings from IEEE Std C37.16, which will be with-drawn when IEEE Std C37.13 and IEEE Std C37.14 revisions have been completed to incorporate the infor-mation previously included within
45、IEEE Std C37.16.1Information of references can be found in Clause 2.8Copyright 2016 IEEE. All rights reserved.Contents1. Overview . 91.1 Scope 91.2 Purpose . 92. Normative references 103. Definitions . 104. General 115. Coordination of circuit breaker and fuse . 125.1 Maximum fuse rating to be used
46、 125.2 Minimum fuse rating to be used 146. Location of fuses . 167. Open-fuse trip devices . 178. Addition or substitution of fuses in existing installations 179. Protection of connected equipment . 1710. Tested combinations of circuit breakers and fuses . 17Annex A (informative) Bibliography 189Co
47、pyright 2016 IEEE. All rights reserved.IMPORTANT NOTICE: IEEE Standards documents are not intended to ensure safety, security, health, or environmental protection, or ensure against interference with or from other devices or networks. Imple-menters of IEEE Standards documents are responsible for det
48、ermining and complying with all appropriate safety, security, environmental, health, and interference protection practices and all applicable laws and regulations.This IEEE document is made available for use subject to important notices and legal disclaimers. These notices and disclaimers appear in
49、all publications containing this document and may be found under the heading “Important Notice” or “Important Notices and Disclaimers Concerning IEEE Documents.” They can also be obtained on request from IEEE or viewed at http:/standards.ieee.org/IPR/disclaimers.html.1. Overview1.1 ScopeThis guide applies to unfused low-voltage ac power circuit breakers of the 635 V maximum voltage class with separately-mounted current-limiting fuses for use on ac circuits with available short-circuit currents of 200 000 A (rms symmetrical) or less. Low-voltage ac fused power circuit br
