CSA C22 2 NO 255-2004 Neon transformers and power supplies (First Edition).pdf

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1、C22.2 No. 255-04(Ueaffirmed 20)Neon transformers and power suppliesLegal 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 representin

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16、s Update ServiceC22.2 No. 255-04October 2004Title: Neon transformers and power suppliesPagination: 99 pages (x preliminary and 89 text), each dated October 2004To register for e-mail notification about any updates to this publicationgo to shop.csa.caclick on CSA Update ServiceThe List ID that you wi

17、ll need to register for updates to this publication is 2015245.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.Blank pagePublished in October 2004 by Ca

18、nadian Standards AssociationA not-for-profit private sector organization5060 Spectrum Way, Suite 100, Mississauga, Ontario, Canada L4W 5N61-800-463-6727 416-747-4044Visit our Online Store at www.ShopCSA.caC22.2 No. 255-04Neon transformers and power suppliesCSA StandardISBN 1-55397-099-3Technical Edi

19、tor: David Hulford Canadian Standards Association 2004All rights reserved. No part of this publication may be reproduced in any form whatsoever without the prior permission of the publisher.October 2004 iiiContents Canadian Standards Association Neon transformers and power suppliesTechnical Committe

20、e on Industrial Products viiSubcommittee on Neon Transformers viiiPreface ixForeword x1Scope 12 Reference publications 13 Definitions 34General 64.1 Components 64.2 Construction type designation 64.3 Component identification requirements 85 Mechanical construction 95.1 Enclosures 95.1.1 General 95.1

21、.2 Metallic enclosure 105.1.3 Corrosion protection 105.1.4 Polymeric enclosure 115.2 Accessibility barriers 125.3 Openings and open holes 145.4 Securement of parts 165.5 Sharp edges 165.6 Mounting 175.7 User-accessible controls 175.8 Supply connections (not including equipment grounding) 175.8.1 Per

22、manently connected supplies 175.8.2 Supply terminals 195.8.3 Supply leads 205.8.4 Cord- and plug-connected supplies 215.8.5 Source of supply other than a branch circuit 225.9 Equipment grounding 235.10 Equipment grounding means 235.10.1 General 235.10.2 Grounding terminal 245.10.3 Grounding leads 25

23、5.10.4 Grounding Cord-connected neon supplies 255.11 Bonding 256 Electrical construction 266.1 Internal wiring 266.1.1 General 266.1.2 Prevention of wire damage 266.2 Internal electrical connections (other than output circuitry) 276.3 Output 27C22.2 No. 255-04 Canadian Standards Associationiv Octobe

24、r 20046.3.1 Output ratings 276.3.2 Output terminals 276.3.3 Output cables 286.4 Input-to-output isolation 296.5 Electrical components 296.5.1 General 296.5.2 On/off switches 306.5.3 Overcurrent protection 306.5.4 Capacitors 306.5.5 Transformers 316.5.6 Thermal protective devices 316.5.7 Printed wiri

25、ng boards 316.5.8 Electrode receptacles 326.6 Secondary-circuit ground-fault protection 326.7 Spacings 346.8 Insulation 397 Tests 417.1 General 417.2 Input measurement test 437.3 Isolated output determination test 437.4 Output measurement test 437.4.1 Maximum output voltage 437.4.2 Maximum output cu

26、rrent measurement 457.5 Temperature test 467.6 Dielectric voltage-withstand tests 517.6.1 General 517.6.2 Primary and secondary circuits 527.6.3 Barriers and insulating materials 547.7 Leakage current test 547.8 Input-to-output isolation test 567.9 Bond impedance test 577.10 Strain and push-back rel

27、ief test 577.11 Switch loading tests 587.11.1 General 587.11.2 Overload 587.11.3 Endurance 597.12 Abnormal operation tests 597.12.1 General 597.12.2 Output open-circuit 607.12.3 Abnormal component short- and open-circuit 617.12.4 Output short-circuit abnormal temperature test 617.12.5 Output shorted

28、-to-ground abnormal test 617.13 Printed wiring board tests 617.13.1 Abnormal trace-to-trace short-circuit 617.13.2 Conformal coating 627.14 Mechanical tests 637.14.1 Polymeric mounting means load 637.14.2 Knockout 637.15 Wire-binding screw terminal tests 637.15.1 Solid-wire tightening 637.15.2 Perfo

29、rmance verification of terminal assemblies on a terminal block 647.16 Secondary-circuit ground-fault parameters test 647.17 Secondary-circuit ground-fault protection circuit abnormal tests 74 Canadian Standards Association Neon transformers and power suppliesOctober 2004 v7.17.1 General 747.17.2 Com

30、ponent fault 757.17.3 Thermal aging 757.17.4 Overvoltage and undervoltage 767.17.5 Power supply interruption 777.17.6 Transient surge 777.17.7 Humidity 778Markings 808.1 General 808.2 Identification 818.3 Ratings 818.4 Cautionary markings 828.5 Installation 839 Damp location neon supplies 849.1 Gene

31、ral 849.2 Electrical construction 849.3 Performance 859.4 Markings 8510 Wet location neon supplies 8510.1 General 8510.2 Mechanical construction and corrosion protection 8510.3 Exclusion of water 8710.3.1 Enclosures 8710.3.2 Gaskets and bushings 8710.3.3 Openings 8710.4 Electrical construction 8710.

32、5 Accelerated aging of gaskets 8810.6 Water spray 8810.7 Markings 89Tables1 Construction type designation 72 Conditions of use for neon supplies intended for factory installation only 93 Minimum thickness of enclosure metal 104 Maximum size of miscellaneous open holes 145 Conduit opening dimensions

33、186 Minimum spacings at input wiring terminals 357 Spacings Damp and wet location use, for input circuitry, not including input terminals, and output circuitry, including connections and terminals 368 Spacings Dry location use only, for input circuitry, not including input terminals, and output circ

34、uitry, including connections and terminals 379 Spacings Printed wiring board assemblies with a conformal coating 3810 Spacings Output circuitry, including connections and terminals, uninsulated to insulated, insulated to insulated, and insulated to the plane of the intended mounting surface in all l

35、ocations 3911 Minimum thickness of insulating materials 4012 Neon tubing length chart 4213 Electrode ratings/dimensions for testing 4314 Maximum open-circuit peak output voltage for other than an end point return neon supply 4415 Maximum open-circuit peak secondary voltage for an end point return ne

36、on supply 4416 Maximum temperature rises 49C22.2 No. 255-04 Canadian Standards Associationvi October 200417 Case temperature code 5018 Electrode receptacle dielectric test potential 5319 Test switch positions 6720 Metal coatings 8621 Water spray operating sequence 89Figures1 Articulate probe with we

37、b stop 132 Relationship of baffle and electrical part to prevent emission 153 Example of thread-forming screw 164 Terminal and conductor relationship 205 Grounding symbol 246 Test enclosure 487 Leakage current measurement circuit 558 Supply cord push-back evaluation 589 Secondary ground-fault test f

38、or midpoint return neon supplies 6710 Secondary ground-fault for ground referenced, end point return neon supplies 6911 Secondary ground-fault for isolated output midpoint return neon supplies 7112 Secondary-circuit ground-fault test circuit for isolated output, end point return neon supplies 7413 S

39、urge generator circuit 7914 Relay control circuit for surge generator 80 Canadian Standards Association Neon transformers and power suppliesOctober 2004 viiTechnical Committee on Industrial ProductsK. Powell Criterions,Glen Williams, OntarioRepresenting ManufacturersChairT. Pope CSA,Mississauga, Ont

40、arioProject ManagerRepresenting Regulatory AuthoritiesT. Olechna Electrical Safety Authority,Mississauga, OntarioS. Paulsen Province of New Brunswick,Fredericton, New BrunswickJ.-L. Robert Rgie du btiment du Qubec,Qubec, QubecA. Tsisserev City of Vancouver,Vancouver, British ColumbiaRepresenting Man

41、ufacturersR.M. Bartholomew Electric Power Equipment (1986) Ltd.,Vancouver, British ColumbiaW. Jones Cutler-Hammer Canada Inc.,Burlington, OntarioM. Smith Rockwell Automation Canada Inc.,Cambridge, OntarioRepresenting General InterestsM. Kasumovich Mississauga, OntarioConsumer RepresentativeR. Robert

42、on Shell Canada Limited,Calgary, AlbertaC22.2 No. 255-04 Canadian Standards Associationviii October 2004Subcommittee on Neon TransformersA. Efantis Allanson International Inc.,Toronto, OntarioChairA. Castillo Universal Lighting Technologies Inc.,Los Indios, Texas, USAC. Hutchings Underwriters Labora

43、tories Inc.,Santa Clara, California, USAAssociateP.K. Kaufmann Transfotec International L.B. Lte,Saint-Eustache, QubecM.A. Khan Muskego, Wisconsin, USAP.A. La Rocque Electrobits International,Montral, QubecG. Montminy Rgie du btiment du Qubec,Qubec, QubecZ. Psarski CSA,Toronto, OntarioAssociateL. Ra

44、dom SaskPower,Regina, SaskatchewanA. Smith France,Fairview, Tennessee, USAA. Zimmerman Actown-Electrocoil Inc.,Spring Grove, Illinois, USAD. Hulford CSA,Mississauga, OntarioProject Manager Canadian Standards Association Neon transformers and power suppliesOctober 2004 ixPrefaceThis is the first edit

45、ion of CSA C22.2 No. 255, Neon transformers and power supplies.For general information on the Standards of the Canadian Electrical Code, Part II, see the Preface of the latest issue of CAN/CSA-C22.2 No. 0.This Standard was prepared by the Subcommittee on Neon Transformers, under the jurisdiction of

46、the Technical Committee on Industrial Products and the Strategic Steering 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 dir

47、ection for the interpretation of standards under its jurisdiction: “The literal 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 c

48、ommittee interpretation has not already been published, CSAs procedures for interpretation shall be followed to determine the intended safety principle”.October 2004Notes: (1) Use of the singular does not exclude the plural (and vice versa) when the sense allows.(2) Although the intended primary app

49、lication of this Standard is stated in its Scope, it is important to note that 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. Consensus implies much more than a simple majority, but not necessarily unanimity”. It is consistent with this