1、IEEE Std C37.21-2005(Revision of IEEE Std C37.21-1985)IEEE Standard forControl SwitchboardsI E E E3 Park Avenue New York, NY 10016-5997, USA1 December 2005IEEE Power Engineering SocietySponsored by theSwitchgear CommitteeIEEE Std C37.21-2005(R2010)(Revision of IEEE Std C37.21-1985)IEEE Standard for
2、Control SwitchboardsSponsorSwitchgear Committeeof theIEEE Power Engineering SocietyApproved 9 September 2005Reaffirmed 8 December 2010IEEE-SA Standards BoardApproved 7 October 2005Reaffirmed 9 August 2011American National Standards InstiuteThe Institute of Electrical and Electronics Engineers, Inc.3
3、 Park Avenue, New York, NY 10016-5997, USACopyright 2005 by the Institute of Electrical and Electronics Engineers, Inc.All rights reserved. Published 1 December 2005. Printed in the United States of America.IEEE is a registered trademark in the U.S. Patent (978) 750-8400. Permission to photocopy por
4、tions of any individual standard for educationalclassroom use can also be obtained through the Copyright Clearance Center.Note: Attention is called to the possibility that implementation of this standard may require use of subject mat-ter covered by patent rights. By publication of this standard, no
5、 position is taken with respect to the existence orvalidity of any patent rights in connection therewith. The IEEE shall not be responsible for identifying patentsfor which a license may be required by an IEEE standard or for conducting inquiries into the legal validity orscope of those patents that
6、 are brought to its attention.ivCopyright 2005 IEEE. All rights reserved.IntroductionThis standard has been revised to reflect changes that have been suggested since the 1985 revision ofIEEE Std C37.21. The revisions in this revision include the following: Modification of the use of units to conform
7、 to the latest IEEE-SA policy on metrification Removal of current ratings for control switchboards Clarification of requirements for production tests Clarification of voltage and current limits for instruments and control circuits Clarification of voltage circuit protection Clarification of altitude
8、 correction factors Expansion of nameplate requirements to include control switchboard ratingsThis standard includes only the requirements for control switchboards (also called control boards). Theserequirements were originally a part of IEEE Std C37.20-1969. Other types of equipment originally incl
9、udedin IEEE Std C37.20-1969 are now incorporated in separate standards.IEEE Std C37.20-1969 for many years covered all switchgear assemblies including metal-enclosed bus andcontrol switchboards. Standards committees of IEEE Switchgear Assemblies Subcommittee and NEMAPower Switchgear Assemblies Techn
10、ical Committee recommended that the document be further developedand, where appropriate, the various subclauses be identified with their own standards.The Switchgear Assemblies Subcommittee of the Switchgear Committee of the IEEE Power EngineeringSociety was responsible for this revision.This public
11、ation is one of a series covering switchgear assemblies as follows: IEEE Std C37.20.1, Standard for Metal-Enclosed Low-Voltage Power Circuit Breaker Switchgear IEEE Std C37.20.2, IEEE Standard for Metal-Clad Switchgear IEEE Std C37.20.3, IEEE Standard for Metal-Enclosed Interrupter Switchgear IEEE S
12、td C37.20.7, IEEE Guide for Testing Medium-Voltage Metal-Enclosed Switchgear forInternal Arcing Faults IEEE Std C37.21, IEEE Standard for Control Switchboards IEEE Std C37.23, IEEE Standard for Metal-Enclosed Bus IEEE StdC37.20.4, IEEE Standard for Indoor AC Switches (1 kV 38 kV) for Use in Metal-En
13、closed Switchgear IEEE Std C37.20.6, IEEE Standard for 4.76 kV to 38 kV Rated Grounding and Testing DevicesUsed in Enclosures IEEE Std C37.24, IEEE Guide for Evaluating the Effect of Solar Radiation on Outdoor Metal-Enclosed SwitchgearThis introduction is not part of IEEE Std C37.21-2005, IEEE Stand
14、ard for Control Switchboards.vCopyright 2005 IEEE. All rights reserved.The following diagram depicts types of switchgear assemblies:Notice to usersErrataErrata, if any, for this and all other standards can be accessed at the following URL: http:/standards.ieee.org/reading/ieee/updates/errata/index.h
15、tml. Users are encouraged to check this URL for errata periodically.InterpretationsCurrent interpretations can be accessed at the following URL: http:/standards.ieee.org/reading/ieee/interp/index.html.PatentsAttention is called to the possibility that implementation of this application guide may req
16、uire use of subjectmatter covered by patent rights. By publication of this application guide, no position is taken with respect tothe existence or validity of any patent rights in connection therewith. The IEEE shall not be responsible foridentifying patents or patent applications for which a licens
17、e may be required to implement an IEEEstandard or for conducting inquiries into the legal validity or scope of those patents that are brought to itsattention.Figure ATypes of switchgear assembliesSWITCHGEAR ASSEMBLIES METAL-ENCLOSED POWER SWITCHGEAR METAL-ENCLOSED BUS C37.23 CONTROL SWITCHBOARDS C37
18、.21 LOW-VOLTAGE POWER CIRCUIT BREAKER (LV) C37.20.1 METAL-CLAD (MC) C37.20.2 METAL-ENCLOSED INTERRUPTER (MEI) C37.20.3 NON-SEGREGATED PHASE SEGREGATED PHASE ISOLATED PHASE REQUIREMENTS AND GUIDE FOR CALCULATING LOSS VERTICAL ( OPEN OR ENCLOSED) DUAL DUPLEX CONTROL DESK BENCHBOARD DUAL BENCHBOARD DUP
19、LEX BENCHBOARD FIXED RACK CABINET SWING RACK CABINET viCopyright 2005 IEEE. All rights reserved.ParticipantsThis revision is dedicated to our friend and colleague Shaun Slattery who passed away during itspreparation.The following is a list of the participants in the C37.21 Working Group of the Switc
20、hgear AssembliesSubcommittee of the Switchgear Committee of the IEEE Power Engineering Society:Doug Edwards, ChairThe following members of the individual balloting committee voted on this application guide. Balloters mayhave voted for approval, disapproval, or abstention. S. (Dave) GohilAnne MorganG
21、eorge NourseTed W. OlsenShaun SlatteryMike WactorPaul D. BarnhartStan BillingsWallace BinderThomas BlairDave BurnsTed BurseEldridge ByronTommy CooperR. DaubertByron DavenportMatthew DavisDonald DunnPete DwyerDoug EdwardsAmir El-SheikhGary EngmannFrank GerleveKenneth GettmanS. (Dave) GohilGeorge Greg
22、oryRandall GrovesKenneth HanusEdward Horgan, Jr.William HurstDavid JacksonRichard JacksonJerry JerabekThomas LaRoseStephen R. LambertWard E. LaubachDavid LemmermanJason LinR. W. LongGregory LuriFrank MayleDeepak MazumdarNigel McQuinG. MichelGeorges MontilletAnne MorganAllan MorseDan NeeserJeffrey Ne
23、lsonPaul J. NotarianGeorge NourseTed W. OlsenMiklos OroszPaulette PayneEd PetersRobert J. PuckettMichael A. RobertsHugh RossJames RuggieriGerald SakatsDavid SchemppRobert SeitzDevki SharmaNed SimonJames SmithAllan St. PeterStan TelanderMalcolm ThadenJane Ann VernerMike WactorJames WilsonviiCopyright
24、 2005 IEEE. All rights reserved.When the IEEE-SA Standards Board approved this application guide on 9 June 2005, it had the followingmembership:Steve M. Mills, ChairRichard H. Hulett, Vice ChairDon Wright, Past ChairJudith Gorman, Secretary*Member EmeritusAlso included are the following nonvoting IE
25、EE-SA Standards Board liaisons:Satish K. Aggarwal, NRC RepresentativeRichard DeBlasio, DOE RepresentativeAlan H. Cookson, NIST RepresentativeDon MessinaIEEE Standards Project EditorMark D. BowmanDennis B. BrophyJoseph BruderRichard CoxBob DavisJulian Forster*Joanna N. GueninMark S. HalpinRaymond Hap
26、emanWilliam B. HopfLowell G. JohnsonHerman KochJoseph L. Koepfinger*David J. LawDaleep C. MohlaPaul NikolichT. W. OlsenGlenn ParsonsRonald C. PetersenGary S. RobinsonFrank StoneMalcolm V. ThadenRichard L. TownsendJoe D. WatsonHoward L. WolfmanCONTENTS 1. Overview 1 2. Normative references 1 3. Defin
27、itions 2 4. Service conditions 5 4.1 Usual service conditions 5 5. Ratings 5 5.1 Voltage and power frequency ratings 5 5.2 Temperature limitations for air surrounding devices within an enclosed switchboard 6 6. Tests . 6 6.1 General 6 6.2 Design tests 6 6.3 Production tests 8 6.4 Field dielectric te
28、st. 9 7. Construction . 10 7.1 General requirements. 10 7.2 Materials and finish . 15 7.3 Indoor switchboards 16 7.4 Outdoor switchboards 16 8. General application guide. 17 8.1 Unusual service conditions 17 8.2 Nuclear power plant application 19 9. Handling, storage, and installation guide . 20 9.1
29、 General 20 9.2 Handling 20 9.3 Pre-operation check . 21 Annex A (informative) Bibliography . 23 vi Copyright 2005 IEEE. All rights reserved. IEEE Standard for Control Switchboards 1. 2. Overview This standard covers ratings, construction, and testing of dead-front control switchboards containing, b
30、ut not limited to, devices such as switches, control devices, instrumentation, metering, monitoring, protective and auxiliary relays, and regulating devices and accessories. It includes, but is not specifically limited to, switchboards for the control and protection of apparatus used for or associat
31、ed with power generation, conversion, transmission, and distribution. It does not apply to industrial controls, communication equipment, switchboards for use onboard ships, or Class 1E switchboards for use in nuclear generating stations, nor does it address human factor considerations. Normative ref
32、erences The following referenced documents are indispensable for the application of this standard. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments or corrigenda) applies. Accredited Standards Commit
33、tee C2, National Electrical Safety Code (NESC).1ASTM B 117, Standard Practice for Operating Salt Spray (Fog) Appartus.2ASTM D 229, Standard Test Method for Rigid Sheet and Plate Materials Used for Electrical Insulation. ASTM D 714, Standard Test Method for Evaluating Degree of Blistering of Paints.
34、ASTM D 1535, Standard Practice for Specifying Color by the Munsell System. ASTM D 1654, Standard Test Method for Evaluation of Painted of Coated Specimens Subjected to Corrosive Environments. 1The NESC is available from the Institute of Electrical and Electronic Engineers, 445 Hoes Lane, Piscataway,
35、 NJ 08854, USA (http:/standards/ieee.org/). 2ASTM publications are available from American Society of Testing and Materials, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, USA (http:/www.astm.org/). 1 Copyright 2005 IEEE. All rights reserved. IEEE Std C37.21-2005 IEEE Standard for Control
36、Switchboards IEEE Std C37.2, IEEE Standard Electrical Power System Device Function Numbers and Contact Designations.3, 4 IEEE Std C37.24, IEEE Guide for Evaluating the Effect of Solar Radiation on Outdoor Metal-Enclosed Switchgear. IEEE Std C37.81, IEEE Guide for Seismic Qualification of Class 1E Me
37、tal-Enclosed Power Switchgear Assemblies.IEEE Std C37.90, IEEE Standard for Relays and Relay Systems Associated with Electric Power Apparatus. IEEE Std C37.90.1, IEEE Standard Surge Withstand Capability (SWC) Tests for Relays and Relay Systems Associated with Electric Power Apparatus. IEEE Std C37.1
38、00, IEEE Standard Definitions for Power Switchgear. NEMA WC70/ICEA S-95-658, Nonshielded Power Cables Rated 2000 Volts or Less.5NFPA 70, National Electrical Code (NEC).6UL 486A, Wire Connectors and Soldering Lugs for Use with Copper Conductors.73.Definitions The definitions of terms contained in thi
39、s standard, or in other standards referred to in this standard, are not intended to embrace all legitimate meanings of the terms. They are applicable only to the subject treated in this standard. If a term is not defined in this standard, the definition in IEEE Std C37.1008 applies. An asterisk (*)
40、following a definition indicates that the definition in this standard is not contained in IEEE Std C37.100while a dagger () indicates the definition differs from that in IEEE Std C37.100. Type of switchboards Switchboards may be freestanding or mounted on equipment or wall. Typical switchboard types
41、 are shown in Figure 1. 3IEEE publications are available from the Institute of Electrical and Electronic Engineers, Service Center, 445 Hoes Lane, Piscataway, NJ 08854, USA (http:/www.standards.ieee.org/). 4The IEEE standards or products referred to in this clause are trademarks of the Institute of
42、Electrical and Electronic Engineers, Inc. 5NEMA publications are available from Global Engineering Documents, 15 Inverness Way East, Englewood, CO 80112, USA (http:/ 6The NEC is published by the National Fire Protection Association, Batterymarch Park, Quincy, MA 02269, USA (http:/www.nfpa.org/). Cop
43、ies are also available from the Institute of Electrical and Electronics Engineers, 445 Hoes Lane, P.O. Box 1331, Piscataway, NJ 08855-1331, USA (http:/standards.ieee.org/). 7UL publications are available from Global Engineering Documents, 15 Inverness Way East, Englewood, CO 80112, USA (http:/ 8For
44、information about documents referenced in this standard, see Clause 2. 2 Copyright 2005 IEEE. All rights reserved. IEEE Std C37.21-2005 IEEE Standard for Control Switchboards Figure 1 Typical switchboards (side views) 3.1 benchboard: A combination of a control desk and a vertical switchboard in a co
45、mmon assembly. See also: dual benchboard; duplex benchboard. 3.2 control desk (console): A control switchboard consisting of one or more relatively short horizontal or inclined panels mounted on an assembly of such a height that the panel-mounted devices are within convenient reach of an attendant.
46、3.3 control switchboard: A type of switchboard including control, instrumentation, metering, protective (relays), or regulating equipment for remotely controlling other equipment. Control switchboards do not include the primary power-switching devices or their connections.* 3 Copyright 2005 IEEE. Al
47、l rights reserved. IEEE Std C37.21-2005 IEEE Standard for Control Switchboards 3.4 dual benchboard: A combination assembly of a benchboard and a vertical hinged panel switchboard placed back to back (no aisle) and enclosed with a top and ends.* See also: benchboard; duplex benchboard. 3.5 dual switc
48、hboard: A control switchboard with front and rear panels separated by a comparatively short distance (no aisle) and enclosed at both ends and top. The panels on at least one side are hinged for access to the panel wiring. See also: duplex switchboard. 3.6 duplex benchboard: A combination assembly of
49、 a benchboard and vertical switchboard placed back-to-back and enclosed with a top and ends (not grille). Access space (aisle) with entry doors is provided between the benchboard and vertical switchboard. See also: benchboard; dual benchboard. 3.7 duplex switchboard: A control switchboard consisting of panels placed back-to-back and enclosed with a top and ends (not grille). Access space (aisle) with entry doors is provided between the rows of panels. See also: dual switchbo
