UL 1778 2005 Uninterruptible Power Systems.pdf

1、FOR INTERNAL UL OR CSDS USE ONLY NOT FOR OUTSIDE DISTRIBUTIONUL 1778ISBN 0-7629-1111-5Uninterruptible Power SystemsFOR INTERNAL UL OR CSDS USE ONLY NOT FOR OUTSIDE DISTRIBUTIONFOR INTERNAL UL OR CSDS USE ONLY NOT FOR OUTSIDE DISTRIBUTIONUnderwriters Laboratories Inc. (UL)333 Pfingsten RoadNorthbrook

2、, IL 60062-2096UL Standard for Safety for Uninterruptible Power Systems, UL 1778Fourth Edition, Dated September 15, 2005Summary of TopicsThis fourth edition of ANSI/UL 1778 has been issued to incorporate several revisions from thetechnical harmonization committee (THC), UL, and CSA.The new requireme

3、nts are substantially in accordance with ULs Bulletin(s) on this subject dated August31, 2004 and June 15, 2005. The bulletin(s) is now obsolete and may be discarded.As indicated on the title page (page 1), this UL Standard for Safety is an American National Standard.Attention is directed to the not

4、e on the title page of this Standard outlining the procedures to be followedto retain the approved text of this ANSI/UL Standard.The UL Foreword is no longer located within the UL Standard. For information concerning the use andapplication of the requirements contained in this Standard, the current

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10、heinability to use this Standard, even if UL or an authorized UL representative 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.SEPTEMBER 15, 2005 UL 1778 tr1FOR INTERNA

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19、pages beingviewed for their own fair and/or practical internal use.The requirements in this Standard are now in effect, except for those paragraphs, sections, tables, figures,and/or other elements of the Standard having future effective dates as indicated in the preface. The priortext for requiremen

20、ts that have been revised and that have a future effective date are located after theStandard, and are preceded by a SUPERSEDED REQUIREMENTS notice.New product submittals made prior to a specified future effective date will be judged under all of therequirements in this Standard including those requ

21、irements with a specified future effective date, unlessthe applicant specifically requests that the product be judged under the current requirements. However, ifthe applicant elects this option, it should be noted that compliance with all the requirements in thisStandard will be required as a condit

22、ion of continued Listing, Recognized, and Follow-Up Services afterthe effective date, and understanding of this should be signified in writing.Copyright 2005 Underwriters Laboratories Inc.This Standard consists of pages dated as shown in the following checklist:Page Date1-66.September 15, 2005SEPTEM

23、BER 15, 2005 UL 1778tr2FOR INTERNAL UL OR CSDS USE ONLY NOT FOR OUTSIDE DISTRIBUTIONCanadian Standard AssociationCSA C22.2 No. 107.3-05Second EditionUnderwriters Laboratories Inc.UL 1778Fourth EditionUninterruptible Power SystemsSeptember 15, 2005ANSI/UL 1778-2005FOR INTERNAL UL OR CSDS USE ONLY NOT

24、 FOR OUTSIDE DISTRIBUTIONCommitment for AmendmentsThis Standard is issued jointly by the Canadian Standards Association (CSA) and UnderwritersLaboratories Inc. (UL). Comments or proposals for revisions on any part of the standard may besubmitted to CSA or UL at any time. Revisions to this Standard w

25、ill be made only after processingaccording to the standards development procedures of CSA and UL. CSA and UL will issue revisionsto this Standard by means of a new edition or revised or additional pages bearing their date of issue.ISBN 1-55397-903-6 2005Canadian Standards AssociationAll rights reser

26、ved. No part of this publication may be reproduced in any form whatsoever without theprior permission of the publisher.ISBN 0-7629-1111-5Copyright 1998, 2005 Underwriters Laboratories Inc.Revisions of this Standard will be made by issuing revised or additional pages bearing their date ofissue. A UL

27、Standard is current only if it incorporates the most recently adopted revisions, all of whichare itemized on the transmittal notice that accompanies the latest set of revised requirements.The most recent designation of ANSI/UL 1778 as an American National Standard (ANSI) occurred onAugust 12, 2005.T

28、his ANSI/UL Standard for Safety, which consists of the Fourth edition is under continuousmaintenance, whereby each revision is ANSI approved upon publication. Comments or proposals forrevisions on any part of the Standard may be submitted to UL at any time. Proposals should besubmitted via a Proposa

29、l Request in ULs On-Line Collaborative Standards Development System(CSDS) at http:/.FOR INTERNAL UL OR CSDS USE ONLY NOT FOR OUTSIDE DISTRIBUTIONCONTENTSPreface .51 General .71.1 Scope .71.2 Definitions .91.3 General requirements .111.4 General conditions for tests .111.5 Components .121.6 Power int

30、erface .131.7 Markings and instructions .142 Protection from hazards .182.1 Protection from electric shock and energy hazards .182.6 Provisions for earthing and bonding .192.7 Overcurrent and earth fault protection in primary circuits .193 Wiring, connections, and supply .203.4 Disconnection from th

31、e mains supply .203.5 Interconnection of equipment .214 Physical requirements .214.1 Stability .214.3 Design and construction .214.5 Thermal requirements .235 Electrical requirements and simulated abnormal conditions .245.2 Electric strength .245.3 Abnormal operating and fault conditions .246 Connec

32、tion to telecommunication networks .277 Connection to cable distribution systems .27Annex AA (normative) Additional component requirementsAA.1 Capacitor surge current test .28AA.2 Oil-filled capacitor fault test .28AA.3 Electrolytic capacitor fault test .28AA.4 Control devices .28AA.4.2 Overload (co

33、ntrol devices) .29AA.4.3 Endurance (control devices) .30AA.5 Static transfer switches .30AA.5.1 General .30AA.5.2 Isolating means .31AA.5.3 Tests .31AA.6 Transfer switches .31AA.7 Load transfer .31AA.8 Bus bars .32AA.8.13 Bus bar tests .35Annex BB (informative) Examples of normal load conditionsBB.1

34、 General .36SEPTEMBER 15, 2005 CSA C22.2 NO. 107.3-05 UL 1778 3FOR INTERNAL UL OR CSDS USE ONLY NOT FOR OUTSIDE DISTRIBUTIONAnnex CC (informative) Safety symbols and their meaningsAnnex DD (normative) Harmonic distortion testAnnex EE (normative) Output circuit groundingEE.1 General requirements .46E

35、E.2 Wiring terminals .47Annex FF (normative) Backfeed protection testFF.1 General .52FF.2 Pluggable type A UPS .52FF.3 Permanently connected UPS .52FF.4 Single fault conditions .52FF.5 Air gap requirements for mechanical disconnect .54FF.6 Electronic backfeed protection .55Annex GG (informative) Pri

36、nciples of backfeed protectionGG.1 General .56GG.2 Air gap requirements for mechanical disconnect .57GG.3 Fault testing .57GG.4 Relays .57GG.5 Electronic protection .58GG.6 Mechanical protection .58GG.7 Control circuitry .58Annex HH (normative) Ventilation of enclosures and battery compartmentsAnnex

37、 II (normative) Standards for componentsII.1 Component Standards .60Annex JJ (informative) French translations and markingsSEPTEMBER 15, 2005CSA C22.2 NO. 107.3-05 UL 17784FOR INTERNAL UL OR CSDS USE ONLY NOT FOR OUTSIDE DISTRIBUTIONPrefaceThis is the common CSA and UL Standard for Uninterruptible P

38、ower Systems (UPS). It is the secondedition of CSA C22.2 No. 107.3 and the fourth edition of UL 1778. This edition of CSA C22.2 No. 107.3supersedes the previous edition published in 2003. This edition of UL 1778 supersedes the previouseditions published in 2003, 1994, and 1989.This common Standard was prepared by the Canadian Standards Association (CSA) and UnderwritersLaboratories Inc. (UL). The efforts and support of the National El