CSA C22 2 NO 235-2004 Supplementary protectors (Second Edition).pdf

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1、C22.2 No. 235-04(reaffirmed 2013)Supplementary protectorsLegal Notice for StandardsCanadian Standards Association (CSA) standards are developed through a consensus standards development process approved by the Standards Council of Canada. This process brings together volunteers representing varied v

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15、ed in this Legal Notice, you may not load or use this document or make any copies of the contents hereof, and if you do make such copies, you are required to destroy them immediately. Use of this document constitutes your acceptance of the terms and conditions of this Legal Notice.Standards Update S

16、erviceC22.2 No. 235-04March 2004Title: Supplementary protectorsPagination: 49 pages (viii preliminary and 41 text), each dated March 2004To register for e-mail notification about any updates to this publicationgo to shop.csa.caclick on CSA Update ServiceThe List ID that you will need to register for

17、 updates to this publication is 2015603.If you require assistance, please e-mail techsupportcsagroup.org or call 416-747-2233.Visit CSA Groups policy on privacy at csagroup.org/legal to find out how we protect your personal information.Published in March 2004 by Canadian Standards AssociationA not-f

18、or-profit private sector organization5060 Spectrum Way, Suite 100, Mississauga, Ontario, Canada L4W 5N61-800-463-6727 416-747-4044Visit our Online Store at www.csa.caC22.2 No. 235-04Supplementary protectorsCSA StandardISBN 1-55397-478-6Technical Editor: Tim Pope Canadian Standards Association 2004Al

19、l rights reserved. No part of this publication may be reproduced in any form whatsoever without the prior permission of the publisher.March 2004 iiiContents Canadian Standards Association Supplementary protectorsTechnical Committee on Industrial Products vSubcommittee on C22.2 No. 235 viPreface viiF

20、oreword viii1Scope 12 Reference publications and definitions 22.1 Reference publications 22.2 Definitions 23 General requirements 34 Construction 34.1 General 34.2 Housings 44.2.1 General 44.2.2 Polymeric housings 44.3 Protection against corrosion 44.4 Insulating material 44.5 Current-carrying parts

21、 54.6 Terminal parts 54.7 Operating mechanism 54.8 Internal wiring 64.9 Spacings 64.10 Ratings 85Marking 86 Tests 96.1 Test conditions 96.1.1 Sequence, samples, and number of tests 96.1.2 Voltage 106.1.3 Frequency 106.1.4 Ambient temperature 106.1.5 Method of testing 106.2 Calibration and recalibrat

22、ion verification (overcurrent-trip and overcurrent-type shunt-trip protectors) 116.3 Temperature (normal) 126.4 Overvoltage and undervoltage (overvoltage-trip, undervoltage-trip, and shunt-trip protectors) 136.5 Operation (overvoltage-trip and undervoltage-trip protectors) 136.6 Overload 136.7 Endur

23、ance 156.8 Short-circuit tests Limited, conditional, and interrupting (suitable for further use) 166.8.1 General 166.8.2 Test conditions 166.8.3 Test circuit 176.8.4 Test criteria 19C22.2 No. 235-04 Canadian Standards Associationiv March 20046.9 Dielectric strength and voltage withstand tests 196.9.

24、1 Dielectric strength test 196.9.2 Voltage withstand test 196.10 Flammability (polymeric housings) 206.11 Moisture absorption (polymeric housings) 206.12 Dielectric voltage withstand test in lieu of measuring spacings 20AnnexesA (informative) Application examples 36Tables1 Minimum spacings for bare

25、live parts 212 Test sequence and application 223 Test voltage 234 Ampacities of copper test leads 235 Full-load currents for AC motors 246 Full-load currents for DC motors 257 Maximum acceptable temperature rises (25 C ambient) 268 Currents for overload tests Protectors and auxiliary switches 279 El

26、ectromagnet test currents for overload tests Auxiliary switches 2710 Currents for endurance tests Protectors and auxiliary switches 2811 Pullout test values for pressure-type wiring terminals not intended for field wiring connections 2912 Test voltages for verifying clearances 3013 Test voltages for

27、 verifying clearances at altitudes other than 2000 m 3014 Methods for testing spacings 3115 Tests for supplementary protectors by application code (after short-circuit test) 32Figures1 Location of cotton pad for short-circuit test 332 Determination of current and power factor for circuits 10 000 A a

28、nd less 343 Determination of short-circuit time constant (oscillographic method) of DC circuits 35 Canadian Standards Association Supplementary protectorsMarch 2004 vTechnical Committee on Industrial ProductsK. Powell Criterions,Glen Williams, OntarioRepresenting ManufacturersChairT. Pope CSA,Missis

29、sauga, OntarioProject ManagerRepresenting Regulatory AuthoritiesT. Olechna Electrical Safety Authority,Mississauga, OntarioS. Paulsen Province of New Brunswick,Fredericton, New BrunswickA. Tsisserev City of Vancouver,Vancouver, British ColumbiaRepresenting ManufacturersR.M. Bartholomew Electric Powe

30、r Equipment Limited,Vancouver, British ColumbiaK. Jones Eaton Cutler-Hammer,Oakville, OntarioM. Smith Rockwell Automation Canada Inc.,Cambridge, OntarioRepresenting General InterestsM. Kasumovich Mississauga, OntarioConsumer RepresentativeR. Roberton Shell Canada Limited,Calgary, AlbertaC22.2 No. 23

31、5-04 Canadian Standards Associationvi March 2004Subcommittee on C22.2 No. 235K. Powell Criterions,Glen Williams, OntarioChairR. Bremer Carlingswitch Incorporated,Plainville, Connecticut, USAD. Drake Rockwell Automation,Milwaukee, Wisconsin, USAM.D. Gardener City of Calgary,Calgary, AlbertaD. Giblin

32、Cooper Bussmann, Inc.,St. Louis, Missouri, USAR. MacKenzie CSA,Toronto, OntarioR. Martin Electrical Safety Authority,Brampton, OntarioP. Notarian Underwriters Laboratories Inc.,Melville, New York, USAAssociateB. Savaria Eaton/Cutler-Hammer Canada Inc.,Burlington, OntarioS. Singh Schneider Canada,Tor

33、onto, OntarioA. Strumpler ABB STOTZ Kontakt,Heidelberg, GermanyB. Winkler E-T-A Circuit Breakers,Mount Prospect, Illinois, USAT. Pope CSA,Mississauga, OntarioProject Manager Canadian Standards Association Supplementary protectorsMarch 2004 viiPrefaceThis is the second edition of CSA C22.2 No. 235, S

34、upplementary protectors, one of a series of Standards issued by the Canadian Standards Association under Part II of the Canadian Electrical Code. It supersedes the previous edition published in 1989.This Standard applies to manual-reset protective devices known as supplementary protectors, which are

35、 intended for use as components within an appliance or other electrical equipment to provide protection against overloads. They supplement the branch-circuit protection. One of the significant technical changes to this Standard is the addition of the new category, “Suitable for further use”.For gene

36、ral information on the Standards of the Canadian Electrical Code, Part II, see the Preface of the latest edition of CAN/CSA-C22.2 No. 0.This Standard was prepared by the Subcommittee on C22.2 No. 235, under the jurisdiction of the Technical Committee on Industrial Products and the Strategic Steering

37、 Committee on Requirements for Electrical Safety, and has been formally approved by the Technical Committee. Interpretations: The Strategic Steering Committee on Requirements for Electrical Safety has provided the following direction for the interpretation of standards under its jurisdiction: “The l

38、iteral text shall be used in judging compliance of products with the safety requirements of this Standard. When the literal text cannot be applied to the product, such as for new materials or construction, and when a relevant committee interpretation has not already been published, CSAs procedures f

39、or interpretation shall be followed to determine the intended safety principle”.March 2004Notes: (1) Use of the singular does not exclude the plural (and vice versa) when the sense allows.(2) Although the intended primary application of this Standard is stated in its Scope, it is important to note t

40、hat it remains the responsibility of the users of the Standard to judge its suitability for their particular purpose.(3) This publication was developed by consensus, which is defined by CSA Policy governing standardization Code of good practice for standardization as “substantial agreement. Consensu

41、s implies much more than a simple majority, but not necessarily unanimity”. It is consistent with this definition that a member may be included in the Technical Committee list and yet not be in full agreement with all clauses of this publication.(4) CSA Standards are subject to periodic review, and

42、suggestions for their improvement will be referred to the appropriate committee.(5) All enquiries regarding this Standard, including requests for interpretation, should be addressed to Canadian Standards Association, 5060 Spectrum Way, Suite 100, Mississauga, Ontario, Canada L4W 5N6. Requests for in

43、terpretation should(a) define the problem, making reference to the specific clause, and, where appropriate, include an illustrative sketch;(b) provide an explanation of circumstances surrounding the actual field condition; and(c) be phrased where possible to permit a specific “yes” or “no” answer.Co

44、mmittee interpretations are processed in accordance with the CSA Directives and guidelines governingstandardization and are published in CSAs periodical Info Update, which is available on the CSA Web site atwww.csa.ca.C22.2 No. 235-04 Canadian Standards Associationviii March 2004ForewordThe Canadian

45、 Standards Association (CSA) develops standards under the name Canadian Standards Association, and provides certification and testing under the name CSA International. CSA International provides certification services for manufacturers who, under license from CSA, wish to use the appropriate registe

46、red CSA Marks on certain products of their manufacture to indicate conformity with CSA Standards.CSA Certification for a number of products is provided in the interest of maintaining agreed-upon standards of quality, performance, interchangeability and/or safety, as appropriate. Where applicable, ce

47、rtification may form the basis for acceptance by inspection authorities responsible for enforcement of regulations. Where feasible, programs will be developed for additional products for which certification is desired by producers, consumers, or other interests. In performing its functions in accord

48、ance with its objectives, CSA does not assume or undertake to discharge any responsibility of the manufacturer or any other party. The opinions and findings of the Association represent its professional judgement given with due consideration to the necessary limitations of practical operation and st

49、ate of the art at the time the Standard is processed.Products in substantial accord with this Standard but which exhibit a minor difference or a new feature may be deemed to meet the Standard providing the feature or difference is found acceptable utilizing appropriate CSA International Operating Procedures. Products that comply with this Standard shall not be certified if they are found to have additional features which are inconsistent with the intent of this Standard. Products shall not be certifiable if they are discov