UL 1437-2006 UL Standard for Safety Electrical Analog Instruments - Panel Board Types (Fourth Edition)《配电板式电子模拟设备》.pdf

1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULUL 1437ISBN 0-7629-1252-9Electrical Analog Instruments Panel Board TypesUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MAT

2、ERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULUnderwriters Laboratories Inc. (UL)333 Pfingsten RoadNorthbrook, IL 60062-2096UL Standard for Safety for Electrical Analog Instruments Panel Board Types, UL 1437Fourth Edition, Dated December 12, 2006Summary of To

3、picsThis new edition of UL 1437 is being issued through ULs electronic publishing system toensure format uniformity between the PDF and HTML versions of the document. Whilenumbering and figure placement, where appropriate, may have been updated, no substantivechanges have been incorporated in the do

4、cument.As indicated on the title page (page1), this UL Standard for Safety has been adopted by the Departmentof Defense.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 version o

5、f the UL Foreword islocated on ULStandardsInfoNet at: http:/ master for this Standard at ULs Northbrook Office is the official document insofar as it relates to aUL service and the compliance of a product with respect to the requirements for that product and service,or if there are questions regardi

6、ng the accuracy of this Standard.ULs Standards for Safety are copyrighted by UL. Neither a printed copy of a Standard, nor the distributiondiskette for a Standard-on-Diskette and the file for the Standard on the distribution diskette should bealtered in any way. All of ULs Standards and all copyrigh

7、ts, ownerships, and rights regarding thoseStandards shall remain the sole and exclusive property of UL.All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, ortransmitted in any form by any means, electronic, mechanical photocopying, recording, or otherwis

8、ewithout prior permission of UL.Revisions of UL Standards for Safety are issued from time to time. A UL Standard for Safety is currentonly if it incorporates the most recently adopted revisions.UL provides this Standard as is without warranty of any kind, either expressed or implied, including butno

9、t limited to, the implied warranties of merchantability or fitness 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 theinabili

10、ty 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.UL will attempt to answer support requests concern

11、ing electronic versions of its Standards. However, thissupport service is offered on a reasonable efforts basis only, and UL may not be able to resolve everysupport request. UL supports the electronic versions of its Standards only if they are used under theconditions and operating systems for which

12、 it is intended. ULs support policies may change fromtime-to-time without notification.DECEMBER 12, 2006 UL 1437 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULUL reserves the right to change the format, presentation, file types and format

13、s, delivery methods andformats, and the like of both its printed and electronic Standards without prior notice.Purchasers of the electronic versions of ULs Standards for Safety agree to defend, indemnify, and holdUL harmless from and against any loss, expense, liability, damage, claim, or judgement

14、(includingreasonable attorneys fees) resulting from any error or deviation introduced while purchaser is storing anelectronic Standard on the purchasers computer system.If a single-user version electronic Standard was purchased, one copy of this Standard may be stored onthe hard disk of a single per

15、sonal computer, or on a single LAN file-server or the permanent storagedevice of a multiple-user computer in such a manner that this Standard may only be accessed by one userat a time and for which there is no possibility of multiple concurrent access.If a multiple-user version electronic Standard w

16、as purchased, one copy of the Standard may be stored ona single LAN file-server, or on the permanent storage device of a multiple-user computer, or on an Intranetserver. The number of concurrent users shall not exceed the number of users authorized.Electronic Standards are intended for on-line use,

17、such as for viewing the requirements of a Standard,conducting a word search, and the like. Only one copy of the Standard may be printed from eachsingle-user version of an electronic Standard. Only one copy of the Standard may be printed for eachauthorized user of a multiple-user version of an electr

18、onic Standard. Because of differences in thecomputer/software/printer setup used by UL and those of electronic Standards purchasers, the printedcopy obtained by a purchaser may not look exactly like the on-line screen view or the printed Standard.An employee of an organization purchasing a UL Standa

19、rd can make a copy of the page or 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 not

20、e following theaffected item. The prior text for requirements that have been revised and that have a future effective dateare located after the Standard, and are preceded by a SUPERSEDED REQUIREMENTS notice.New product submittals made prior to a specified future effective date will be judged under a

21、ll of therequirements in this Standard including those requirements 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 th

22、e requirements in thisStandard will be required as a condition of continued Recognition and Follow-Up Services after theeffective date, and understanding of this should be signified in writing.Copyright 2006 Underwriters Laboratories Inc.This Standard consists of pages dated as shown in the followin

23、g checklist:Page Date1-48 .December 12, 2006DECEMBER 12, 2006 UL 1437tr2UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULDECEMBER 12, 20061UL 1437Standard for Electrical Analog Instruments Panel Board TypesFirst Edition November, 1979Second Edi

24、tion March, 1993Third Edition April, 1998Fourth EditionDecember 12, 2006An effective date included as a note immediately following certain requirementsis one established by Underwriters Laboratories Inc.The Department of Defense (DoD) has adopted UL 1437 on October 3, 1994.The publication of revised

25、 pages or a new edition of this Standard will notinvalidate the DoD adoption.Revisions of this Standard will be made by issuing revised or additional pagesbearing their date of issue. A UL Standard is current only if it incorporates themost recently adopted revisions, all of which are itemized on th

26、e transmittal noticethat accompanies the latest set of revised requirements. Comments or proposalsfor revisions on any part of the Standard may be submitted to UL at any time.Proposals should be submitted via a Proposal Request in ULs On-LineCollaborative Standards Development System (CSDS) at http:

27、/.ISBN 0-7629-1252-9COPYRIGHT 2006 UNDERWRITERS LABORATORIES INC.UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULDECEMBER 12, 2006ELECTRICAL ANALOG INSTRUMENTS PANEL BOARD TYPES - UL 14372No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORI

28、ZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULCONTENTSINTRODUCTION1 Scope .62 Glossary .83 Components 84 Units of Measurement .95 References .9CONSTRUCTION6 General 96.1 General .96.2 Component construction requirements 97 Enclosure and Insulating Materials 97.1 General .97.2

29、 Enclosure materials 107.3 Insulating materials 128 Accessibility of Live Parts .128.1 General 128.2 Determination of accessibility .128.3 Determination of electric shock 148.4 Instrument connection .148.5 Operator servicing .158.6 Operating shafts 158.7 Adjustment openings 159 Connection Devices 15

30、9.1 Terminals .159.2 Insulation .159.3 Protective ground terminals .169.4 Screw connections 1610 Internal Wiring 1611 Separation of Circuits .1711.1 General .1711.2 Printed-wiring boards .1712 Spacings 1712.1 Circuits 1712.2 Fasteners .1813 Grounding .1814 Component Parts and Accessories 1914.1 Resi

31、stors and inductors .1914.2 Component short-circuit .1914.3 Overcurrent protective and thermal-limiting devices .1914.4 Accessories .1915 Subdivision of Circuits Into Groups 1915.1 General .1915.2 Open-circuit voltage measurement .2015.3 Available-current measurement 2015.4 Current-limiting means 20

32、15.5 Overload-protector rating 2015.6 Fixed-impedance rating .23DECEMBER 12, 2006 ELECTRICAL ANALOG INSTRUMENTS PANEL BOARD TYPES - UL 1437 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL15.7 Regulating-network rating .23PERFORMANCE16 Genera

33、l 2316.1 General .2316.2 Voltmeter sensitivity 2316.3 Cheesecloth indicators 2316.4 Reference test conditions (reference conditions for test purposes) 2416.5 Protective devices 2516.6 Voltage and current 2517 Leakage Current Test .2517.1 General .2517.2 Specified measuring instrument 2617.3 Instrume

34、nt connection 2717.4 Enclosure of insulating material 2718 Normal Temperature Test 2818.1 General .2818.2 Instrument mounting 2918.3 Instrument connections .2918.4 Doors and covers 2918.5 Thermocouples 2918.6 Temperature limits 2919 High-Ambient Temperature Evaluation 3019.1 Instrument conditioning

35、.3019.2 Insulating materials .3019.3 Polymeric enclosures .3020 Insulation Voltage Test (Dielectric Voltage-Withstand Test) 3020.1 General .3020.2 Indication of breakdown .3121 Humidity Conditioning .3121.1 General .3121.2 Preconditioning 3121.3 Conditioning .3222 Torque Test for Terminals .3222.1 G

36、eneral .3222.2 Direction and application of torque .3223 Testing Under Fault Conditions .3323.1 General .3323.2 Fire .3523.3 Electric shock 3523.4 Protective devices and circuit components 3523.5 Fault conditions 3523.6 Multi-function and over-range test 3724 Polymeric Enclosure Stress-Relief Distor

37、tion .3724.1 General .3724.2 Test criteria 3824.3 Test procedure .3825 Enclosure Impact Test (Does Not Apply to Windows) .3825.1 General .3825.2 Test procedure .3925.3 Alternate enclosure impact test 4126 Window Impact .41DECEMBER 12, 2006ELECTRICAL ANALOG INSTRUMENTS PANEL BOARD TYPES - UL 14374UL

38、COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL26.1 General .4127 Polymeric-Enclosure Pressure 4227.1 General .4227.2 Test procedure .4328 Window Pressure .4328.1 General .4328.2 Test method .43MANUFACTURING AND PRODUCTION TESTS29 General 4329.1

39、 General .4329.2 Test equipment 43MARKINGS30 Details .4430.1 General requirements .4430.2 Manufacturers identification .4430.3 Model identification .4430.4 Factory identification 4430.5 Voltage measuring or testing terminal rating .4430.6 Current measuring terminal rating 4530.7 Isolated measuring t

40、erminal rating 4530.8 Polarity .4530.9 Edgewise instruments .4530.10 Radio-frequency instruments .4530.11 Scale marking 4530.12 External accessories 4631 Caution and Warning Notices 4631.1 Protective ground terminals 4631.2 Markings requiring explanations 4631.3 Fuse-replacement caution markings 473

41、1.4 Protective-device-replacement caution marking 47DECEMBER 12, 2006 ELECTRICAL ANALOG INSTRUMENTS PANEL BOARD TYPES - UL 1437 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULINTRODUCTION1 Scope1.1 These requirements cover electrical and ele

42、ctrically operated indicating and recording instruments ofthe analog type that are powered only from the measured parameter and are intended for ordinary use inpanel boards and the like.1.2 These requirements cover direct-acting or indirect-acting instruments and accessories that maycontain electron

43、ic devices.1.3 These requirements cover instruments indicating quantities of electrical analogs including all of thefollowing:a) Ammeters.b) Voltmeters.c) Wattmeters.d) Varmeters (reactive volt-ampere meters).e) Frequency meters.f) Power-factor meters.g) Synchroscopes.1.4 These requirements cover in

44、struments constructed for special purposes such as, ultrasensitive d-cmicroammeters, high-resistance voltmeters, thermo-milliammeters, thermal voltmeters of thevacuum-couple type, and instruments with special and unusual ranges.1.5 These requirements cover analog instruments that may be categorized

45、according to use or principleof operation as follows:a) Use:1) Panel Type, including edgewise.2) Switchboard type, including edgewise.b) Principle of operation:1) Electrodynamics.2) Permanent-magnet moving coil.3) Moving iron.4) Thermocouple.5) Rectifier.DECEMBER 12, 2006ELECTRICAL ANALOG INSTRUMENT

46、S PANEL BOARD TYPES - UL 14376UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL1.6 These requirements also cover auxiliary equipment and accessories designed to be used withmeasuring instruments as indicated in 1.1 1.5.1.7 These requirements do

47、 not cover:a) Indicating instruments provided with arrangements for curve drawing, contact making, andthe like that derive the power for the functioning of these arrangements from an external sourceother than the measured parameter.b) Instruments that use active devices such as transistors, electron

48、 tubes, and the like foramplifying the electrical quantity measured, that require a power source other than the quantitymeasured for operation. An example of this is a battery-powered ohmmeter. This equipment iscovered by the requirements for electrical and electronic measuring and testing equipment

49、, UL1244.1.8 Instruments covered by these requirements are intended for use indoors or in sheltered (from theelements) locations, as follows:a) Temperature540C or 41 104F; instruments may occasionally be used for temporaryor short periods at minus 10 plus 5C or 14 41F.b) Altitude Up to 2200 meters (7218 feet).c) Relative Humidity Up to 80 percent.1.9 These requirements do not cover certain other properties of the instruments such as effectiveness,accuracy, or reli