1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULUL 845Motor Control CentersUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION
2、 ORDISTRIBUTION WITHOUT PERMISSION FROM ULUL Standard for Safety for Motor Control Centers, UL 845Fifth Edition, Dated August 31, 2005SUMMARY OF TOPICSThis revision to ANSI/UL 845, the Standard for Motor Control Centers includes:1. Addition of 4.2.2 to correspond with 4th edition of UL 845.2. Revisi
3、on of 6.3.8 to add a blank after the word rating.3. Revision of 6.3.50 to address Cautionary Marking Letter Size.4. Addition of 6.3.62 marking requirement.5. Revision of wording in Tables 7, 8, and 9, footnote A.6. Revision of 8.1.7.1 and addition of 8.2.25.6 to address indirect locking schemes.7. R
4、evision of 8.2.4.1 to correct clause references.8. Revision to 8.2.10.3 to correct clause references.9. Addition of 8.2.13.15 and 8.2.13.16 to correspond with 4th edition of UL 845.10. Revision of clauses to reference Table 17 to clarify the meaning of ampacity.11. Addition of 8.2.20.7 (d) to be con
5、sistent with UL 891.12. Revise 8.2.26.11 to clarify spacing requirements.13. Revision of 8.2.31.3.1 to correct terminology.14. Revision of 9.3.18 temperature test requirements.15. Revision of 9.10.3.3, 9.10.10.5, and 8.3.10 to clarify requirements for doors whenrunning a bus withstand test.16. Revis
6、ion of 9.10.7 to remove connections from the title.17. Revise the reference in clause 9.12.1.6 to include reference to line connections.18. Revision of 9.12.6.3 and addition of 9.12.6.3a to clarify requirements for cases wherethe unit short-circuit rating is higher than the withstand rating of the d
7、isconnect switch19. Revision of Table 19 to add headers.20. Revision of Table 20 to correct errors.21. Revision of Table 22 to correct errors.22. Revision of Table 24 to correct subscript errors.JULY 15, 2011 UL 845 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WI
8、THOUT PERMISSION FROM UL23. Revision of Table 27 to show temperature in Kelvin (K).24. Revision of Table 27 to add superscript m to define the location point for thetemperature rise measurement.25. Revision of Table 27 to add requirment to monitor the temperature of a bus bar at thepoint where it co
9、nnects to a breaker.26. Revision of Table 33 to delete superscript c.Text that has been changed in any manner or impacted by ULs electronic publishing system is markedwith a vertical line in the margin.All rights reserved. No part of this publication may be reproduced, stored in a retrieval system,
10、ortransmitted in any form by any means, electronic, mechanical photocopying, recording, or otherwisewithout prior permission of UL.UL provides this Standard as is without warranty of any kind, either expressed or implied, including butnot limited to, the implied warranties of merchantability or fitn
11、ess for any purpose.In no event will UL be liable for any special, incidental, consequential, indirect or similar damages,including loss of profits, lost savings, loss of data, or any other damages arising out of the use of or theinability to use this Standard, even if UL or an authorized UL represe
12、ntative has been advised of thepossibility of such damage. In no event shall ULs liability for any damage ever exceed the price paid forthis Standard, regardless of the form of the claim.Users of the electronic versions of ULs Standards for Safety agree to defend, indemnify, and hold ULharmless from
13、 and against any loss, expense, liability, damage, claim, or judgment (including reasonableattorneys fees) resulting from any error or deviation introduced while purchaser is storing an electronicStandard on the purchasers computer system.The requirements in this Standard are now in effect, except f
14、or those paragraphs, sections, tables, figures,and/or other elements of the Standard having future effective dates as indicated in the preface. The priortext for requirements that have been revised and that have a future effective date are located after theStandard, and are preceded by a SUPERSEDED
15、REQUIREMENTS notice.JULY 15, 2011 UL 845tr2UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULAssociation of Standardization and CertificationNMX-J-353-ANCE-2006Second EditionCanadian Standards AssociationCSA C22.2 No. 254-05First EditionUnderwri
16、ters Laboratories Inc.UL 845Fifth EditionMotor Control CentersAugust 31, 2005(Title Page Reprinted: July 15, 2011)ANSI/UL 845-2011UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULCommitment for AmendmentsThis standard is issued jointly by the A
17、ssociation of Standardization and Certification (ANCE), theCanadian Standards Association (CSA), and Underwriters Laboratories Inc. (UL). Comments orproposals for revisions on any part of the standard may be submitted to ANCE, CSA, or UL at any time.Revisions to this standard will be made only after
18、 processing according to the standards developmentprocedures of ANCE, CSA, and UL. CSA and UL will issue revisions to this standard by means of anew edition or revised or additional pages bearing their date of issue. ANCE will incorporate the samerevisions into a new edition of the standard bearing
19、the same date of issue as the CSA and UL pages.Copyright 2006 ANCERights reserved in favor of ANCEISBN 1-55397-107-8 2005 Canadian Standards AssociationAll rights reserved. No part of this publication may be reproduced in any form whatsoever without theprior permission of the publisher.CSA Standards
20、 are subject to periodic review, and suggestions for their improvement will be referredto the appropriate committee. To submit a proposal for change to CSA Standards, please send thefollowing information to inquirescsa.ca and include Proposal for change in the subject line:Standard designation (numb
21、er); relevant clause, table, and/or figure number; wording of the proposedchange; and rationale for the change.To purchase CSA Standards and related publications, visit CSAs Online Store at www.ShopCSA.ca orcall toll-free 1-800-463-6727 or 416-747-4044.Copyright 2011 Underwriters Laboratories Inc.UL
22、s Standards for Safety are copyrighted by UL. Neither a printed nor electronic copy of a Standardshould be altered in any way. All of ULs Standards and all copyrights, ownerships, and rights regardingthose Standards shall remain the sole and exclusive property of UL.This ANSI/UL Standard for Safety
23、consists of the Fifth Edition including revisions through July 15, 2011.The most recent designation of ANSI/UL 845 as an American National Standard (ANSI) occurred onJuly 15, 2011. ANSI approval for a standard does not include the Cover Page, Transmittal Pages, TitlePage (front and back), or the Pre
24、face.The Department of Defense (DoD) has adopted UL 845 on April 20, 1993. The publication of revisedpages or a new edition of this Standard will not invalidate the DoD adoption.Comments or proposals for revisions on any part of the Standard may be submitted to UL at any time.Proposals should be sub
25、mitted via a Proposal Request in ULs On-Line Collaborative StandardsDevelopment System (CSDS) at http:/.To purchase UL Standards, visit Comm 2000 at http:/m- call toll-free 1-888-853-3503.UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULCONTENT
26、SPreface .61 Scope .81.1 Products covered .81.2 Products not covered .81.3 Equipment .81.4 Units of measurement .92 Normative references 93 Definitions 94 Application Information and Components .104.2 Components 115 Characteristics .115.1 General 115.2 Voltage ratings 125.3 Current .125.4 Short-circ
27、uit .126 Markings and product information 136.1 Identification 136.2 Product information 136.3 Marking 146.4 Installation instructions .247 Normal service and transport conditions 247.1 General 247.2 Normal service conditions 258 Construction and performance requirements 258.1 General assembly .258.
28、2 Construction requirements 278.3 Performance requirements 569 Motor control center tests .609.1 General 609.2 Calibration tests .609.3 Temperature-rise tests .619.4 Overvoltage and undervoltage test 639.5 Dielectric voltage-withstand tests (after temperature-rise test or overvoltage/undervoltagetes
29、t) .649.6 Current-withstand test 64A9.7 Dielectric voltage-withstand tests (after current-withstand test) .64A9.8 Contactor overload test .64A9.9 Dielectric voltage-withstand test (after contactor overload test) 679.10 Short-circuit tests bus structure .679.11 Dielectric voltage-withstand test (afte
30、r short-circuit test bus structure) .729.12 Short-circuit (standard-level) tests for motor control center units 739.13 Dielectric voltage-withstand test (after standard-level unit short-circuit test) .76A9.14 Trip-out test for circuit-breakers (after standard-level unit short-circuit test) 779.15 Sh
31、ort-circuit (high-level) test for motor control center units 789.16 Dielectric voltage-withstand test (after high-level short-circuit test motor control centerunits) .819.17 Trip-out test for circuit-breakers (after high-level unit short-circuit test) 819.18 Strength of insulating base and support t
32、ests 829.19 Comparative deflection test 83JULY 15, 2011 NMX-J-353-ANCE-2006 CSA C22.2 NO. 254-05 UL 845 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL9.20 Autotransformer starter test 839.21 Factory tests .8310 Application .83Tables 84Figur
33、es 111Annex A (Normative) Short-circuit test circuit calibrationA.1 General 121A.2 Alternating-current circuits .121A.2.1 General .121A.2.2 Available current of 10 000 A or less .122A.2.3 Available current more than 10 000 A .122A.2.4 Recovery voltage .124A.3 Direct-current circuits 125A.4 Instrumen
34、tation for test currents above 10 000 A .126A.5 Calibration characteristics for a protective device .128A.6 Peak let-through current, Ip128A.7 Application .130Annex B (informative) LanguagesAnnex C (Normative) ReferencesAnnex D (Informative) Standards for ComponentsAnnex E (Normative) For Canada Onl
35、y Guidelines for certification of fire pump controllersAnnex F (Informative) Factory testsAnnex G (Normative) Requirements for service entranceAnnex H (Informative) Application informationH.1 General 141H.2 Definitions .141H.3 Classifications 141H.3.1 Classes and types 141H.3.2 Classes of motor cont
36、rol centers .142H.3.3 Circuit wiring .143H.4 Characteristics .144H.4.1 Motor-controller size ratings .144H.4.2 Basis for short-circuit current rating of motor control centers .145H.4.3 Instructions for installation, operation, and maintenance .146H.5 Service and storage conditions .146AUGUST 31, 200
37、5NMX-J-353-ANCE-2006 CSA C22.2 NO. 254-05 UL 8454UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULH.5.1 Usual service and installation conditions 146H.5.2 Storage temperature 148H.6 Construction .148H.6.1 Construction information 148H.6.2 Groun
38、d fault tests (production tests) 149H.7 Application input 149H.7.1 Technical information needed to supply a motor control center (application input) . .149H.7.2 Application of short-circuit current ratings 150AUGUST 31, 2005 NMX-J-353-ANCE-2006 CSA C22.2 NO. 254-05 UL 845 5UL COPYRIGHTED MATERIAL NO
39、T AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULPrefaceThis is the harmonized ANCE, CSA, and UL standard for Motor Control Centers. It is the second editionof NMX-J-353-ANCE, the first edition of CSA-C22.2 No. 254, and the fifth edition of UL 845. This editionof UL 845
40、 supersedes the previous edition published in February 15th 1995.This harmonized standard was prepared by the Association of Standardization and Certification (ANCE),the Canadian Standards Association (CSA), and Underwriters Laboratories Inc., (UL). The efforts andsupport of the CANENA Technical Har
41、monization Subcommittee 17D Motor Control Centers aregratefully appreciated.The present Mexican Standard was developed by the CT CDI Control y Distribucion Industrial from theComite de Normalizacion de la Asociacion de Normalizacion y Certificacion, A.C., CONANCE, with thecollaboration of the motor
42、control centers manufactures and users.This standard was reviewed by the CSA Subcommittee on Motor Control Centers, under the jurisdictionof the CSA Technical Committee on Industrial Products and the CSA Strategic Steering Committee onRequirements for Electrical Safety, and has been formally approve
43、d by the CSA Technical Committee.This standard has been approved by the American National Standards Institute (ANSI) as an AmericanNational Standard.A UL standard is current only if it incorporates the most recently adopted revisions, all of which areitemized on the transmittal notice that accompani
44、es the latest set of revised requirements.Where reference is made to a specific number of samples to be tested, the specified number shall beconsidered a minimum quantity.NOTE: Although the intended primary application of this standard is stated in its scope, it is important to notethat it remains t
45、he responsibility of the users of the standard to judge its suitability for their particular purpose.Level of harmonizationThis standard is published as an identical standard for ANCE, CSA, and UL. An identical standard is astandard that is exactly the same in technical content except for national d
46、ifferences resulting fromconflicts in codes and governmental regulations. Presentation is word for word except for editorialchanges.InterpretationsThe interpretation by the standards development organization of an identical or equivalent standard isbased on the literal text to determine compliance w
47、ith the standard in accordance with the proceduralrules of the standards development organization. If more than one interpretation of the literal text has beenidentified, a revision is to be proposed as soon as possible to each of the standards developmentorganizations to more accurately reflect the
48、 intent.ANCE effective dateThe effective date for ANCE will be announced through the Diario Oficial de la Federacin (OfficialGazette) and is indicated on the cover page.JULY 15, 2011NMX-J-353-ANCE-2006 CSA C22.2 NO. 254-05 UL 8456UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDIST
49、RIBUTION WITHOUT PERMISSION FROM ULCSA effective dateThe effective date for CSA International will be announced through CSA Informs or a CSA certificationnotice.UL effective dateAs of July 15, 2011 all products Listed or Recognized by UL must comply with the requirements in thisstandard.A UL effective date is one established by Underwriters Laboratories Inc. and is not part of the ANSIapproved standard.JULY 15, 2011 NMX-J-353-ANCE-2006 CSA C22.2 NO. 254-05 UL 845
