UL 60947-7-3 (ND)-2011 National Differences For UL 60947-7-3 Low-Voltage Switchgear and Controlgear - Part 7-3 Ancillary Equipment - Safety Requirements for Fuse Terminal Blocks (S.pdf

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1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULNational Differences ForUL 60947-7-3Low-Voltage Switchgear and Controlgear - Part 7-3: Ancillary Equipment - Safety Requirementsfor Fuse Terminal BlocksUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR

2、FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULNational Differences ForUL 60947-7-3Low-Voltage Switchgear and Controlgear - Part 7-3: Ancillary Equipment - Safety Requirements forFuse Terminal BlocksEdition: 2Edition Date: May 6, 2011This revision of ANSI/UL 60947-7-3 is to add the AN

3、SI approval date to the title page. Thisstandard is a bi-national IEC-based standard that is harmonized for Mexico and the UnitedStates, and co-published by both standards development organizations (ANCE and UL).This document provides a single listing of the National Differences included in the UL a

4、doption ofthe corresponding IEC standard.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 otherwisewithout prior permission of UL.UL provides this standards doc

5、ument as is without warranty of any kind, either expressed or implied,including but not 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, lo

6、st savings, loss of data, or any other damages arising out of the use of or theinability to use this standards document, even if UL or an authorized UL representative has been advisedof the possibility of such damage. In no event shall ULs liability for any damage ever exceed the pricepaid for this

7、standards document, 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 and against any loss, expense, liability, damage, claim, or judgment (including reasonableattorneys fees) resulting from any error

8、 or deviation introduced while purchaser is storing an electronicStandard on the purchasers computer system.Copyright Underwriters Laboratories Inc.OCTOBER 14, 2011NATIONAL DIFFERENCES FOR UL UL 60947-7-32UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSI

9、ON FROM ULPrefaceThis document provides a single listing of the technical National Differences included in the UL adoptionof the corresponding IEC standard.In its IEC-based standards, UL uses the notations indicated below to identify national difference type, andthese types are additionally noted in

10、 this document. The standard may not use all types of thesedeviations.D1 - These are deviations which are based on basic safety principles and requirements, elimination ofwhich would compromise safety for U.S. consumers and users of products.D2 - These are deviations based on safety practices. These

11、 are deviations for IEC requirements that maybe acceptable, but adopting the IEC requirements would require considerable retesting or redesign on themanufacturers part.DC - These are deviations based on the component standards and will not be deleted until a particularcomponent standard is harmonize

12、d with the IEC component standard.DE - These are deviations based on editorial comments or corrections.DR - These are deviations based on the national regulatory requirements.Each national difference contains a description of what the national difference entails. Typically one of thefollowing words

13、is used to explain how the text of the national difference is to be applied to the base IECtext:Addition / Add - An addition entails adding a complete new numbered clause, subclause, table,figure, or annex. Addition is not meant to include adding select words to the base IEC text.Deletion / Delete -

14、 A deletion entails complete deletion of an entire numbered clause, subclause,table, figure, or annex without any replacement text.Modification / Modify - A modification is an altering of the existing base IEC text such as theaddition, replacement or deletion of certain words or the replacement of a

15、n entire clause,subclause, table, figure, or annex of the base IEC text.OCTOBER 14, 2011 NATIONAL DIFFERENCES FOR UL UL 60947-7-3 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULNational Differences1.2DV DR Addition:For a list of Mexico and U

16、SA Normative Standards, see Annex DVA of this standard.2.1DV D2 Modification of Clause 2.1 as follows:terminal block base with or without a fuse carrier.3DV.1 D2 Addition:c) fuse terminal block without a fuse-carrier, e.g. fixed mounted fuse clips.3DV.2 D2 Addition:Clause 3, Classification, of UL 60

17、947-7-1 applies.4.1DV D2 Addition:Dimensions of cartridge fuse-link shall be stated.4.2DV D2 Deletion:Subclause 4.2 does not apply in the United States.4.3.7DV D2 Addition:4.3.7DV.1 Type of terminal blockSubclause 4.2, Type of terminal block, of UL 60947-7-1 applies.4.3.8DV D2 Addition:4.3.8DV.1 Rat

18、ed and limiting valuesSubclause 4.3.6DV.1, Rated and limiting values, of UL 60947-7-1 applies.5.2DV D2 Additions:5.2DV.1 a) to Annex DVA, Item F (NMX-J-515-ANCE), if the manufacturer claimscompliance with this standardOCTOBER 14, 2011NATIONAL DIFFERENCES FOR UL UL 60947-7-34UL COPYRIGHTED MATERIAL N

19、OT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL5.2DV.2 g), and h) do not apply5.2DV.3 Subclause 5.2DV, Additional information, of Annex DVA, Item A applies.5.3DV D2 Deletion:Subclause 5.3 does not apply.7.1DV D2 Addition:Subclause 7.1, Constructional requirements, of

20、 Annex DVA, Item A applies as modified bythe requirements of 7.1.1 through 7.1.9 DV and addition of 7.1.5 DV.7.1.1DV D2 Additions:7.1.1DV.1 A metal part for mounting or holding contact clips shall be securely and rigidlyfastened to the supporting base or mounting surface. All current-carrying parts

21、shall beprevented from turning or shifting in position by means other than friction betweensurfaces.NOTE: Turning or shifting may be prevented by the use of two screws or rivets, bynoncircular shoulders or mortises, by a dowel pin, lug, or offset, by a connecting strap orclip fitted into an adjacent

22、 part, or by an equivalent method.7.1.1DV.2 For the USA, where parts are held together by screws, a threaded part shall nothave fewer than two full, clean-cut threads. Threads shall not be finer than 12-24, 10-32,8-32, and 6-36 if the screw extends all the way through the threaded part. If the screw

23、 doesnot extend all the way through the threaded part, it shall engage full, clean-cut threads fora distance of not less than the diameter of the screw.7.1.1DV.3 Copper and brass are not acceptable for the plating of an iron or steelwire-binding screw, nut, or stud terminal, but a plating of zinc is

24、 acceptable.7.1.2DV D2 Additions:7.1.2DV.1 A mounting-screw hole shall be located or countersunk so that there will be aspacing of not less than 12.7 mm over the surface of the insulating material between thehead of the screw or washer and the nearest uninsulated live part.7.1.2DV.2 A mounting-screw

25、 hole located between uninsulated live parts of oppositepolarity shall be countersunk unless barriers of the equivalent are provided to prevent thescrewhead from being in the path of a possible arc between such live parts.7.1.2DV.3 For the United States testing per 8.3.2 is not required.7.1.8DV D2 A

26、ddition:For the USA products claiming safety from finger touch shall be IP 20. Products notclaiming safety from finger touch shall be IP 00. Definitions of IP Codes can be found inIEC 60529.OCTOBER 14, 2011 NATIONAL DIFFERENCES FOR UL UL 60947-7-3 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER

27、REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL7.1.9DV D2 Addition:Contact clips of cartridge fuse terminal blocksEnd stops in the contact clips, or other suitable means, shall be provided to ensure theproper location of a fuse-link.7.2.1DV.1 D2 Modification:Subclause 7.2DV.1, Test of mechani

28、cal strength of clamping units, Subclause 7.2DV.2, Tabpull test, and Subclause 7.2DV.3, Solid-wire tightening test, of Annex DVA, Item A apply.7.2.2.1DV D2 Addition:Subclause 7.2.2, Dielectric properties, of Annex DVA, Item A applies.7.2.2.2DV D2 Deletion:Subclause 7.2.2.2 does not apply.7.2.2.3DV D

29、2 Modification:For the United States, the temperature rises of a fuse terminal block shall not exceed thevalues listed in Table 7.2.2.3DV. For Mexico, the temperature rises on a terminal block shallnot exceed the applicable values specified in Table 7.2.2.3DV, except any bus, strap or fuseclip when

30、tested with a fuse, and a pressure terminal connectors for field installedconductors shall not exceed 45K.Table 7.2.2.3DVMaximum acceptable temperature risesMaterials and components C (F)1. Insulation base aa2. Any bus, strap or fuse clip when tested with a dummy fuse 30 (54)3. Any bus, strap or fus

31、e clip when tested with a fuse 85 (185)4. Pressure terminal connectors for field installed conductors 50b(90)bNOTE - These limits do not apply to an insulated conductor or other material that has been investigated and foundacceptable for a higher temperature.aRated temperature limit of material minu

32、s test ambient temperature.bIn a fuse type terminal block tested with dummy fuse links, the recorded temperature rise is increased 20C torepresent the heating of fuses.7.2.2.4DV D2 Addition:For the United States, Subclause 7.2.5, Electrical performance after ageing (forscrewless-type terminal blocks

33、 only), of Annex DVA, Item A applies.7.2.3DV D2 Deletion:For the United States, subclause 7.2.3 does not apply.OCTOBER 14, 2011NATIONAL DIFFERENCES FOR UL UL 60947-7-36UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL8.3.1DV D2 Addition: tab pu

34、ll test (8.3.6DV); solid wire tightening test (8.3.7DV);8.3.2DV D2 Deletion:For the United States, subclause 8.3.2 does not apply.8.3.3.4DV D2 Deletion:For the United States, subclause 8.3.3.4 does not apply.8.3.4DV D2 Deletion:Subclause 8.3.4 does not apply.8.3.5DV D2 Deletion:Subclause 8.3.5 does

35、not apply.8.3.6DV D2 Addition:Tab pull testSubclause 8.3.3.6DV.1 of Annex DVA, Item A applies.8.3.7DV D2 Addition:Solid wire tightening testSubclause 8.3.3.6DV.2 of Annex DVA, Item A applies8.4.1DV D2 Addition: verification of clearances and creepage distances (8.4.2DV) temperature-rise for screw-le

36、ss and insulation displacement terminal blocks(8.4.8DV) ageing test for insulation displacement terminal blocks (8.4.9DV)8.4.2DV D2 Addition:Verification of clearances and creepage distancesSubclause 8.4.2 of Annex DVA, Item A applies.8.4.3DV D2 Modification:Subclause 8.4.3 of Annex DVA, Item A appl

37、ies.OCTOBER 14, 2011 NATIONAL DIFFERENCES FOR UL UL 60947-7-3 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL8.4.4DV D2 Deletion:Subclause 8.4.4 does not apply.Figure 1DV D2 Modification:8.4.5DV D2 Modification of first paragraph:Three fuse

38、terminal blocks shall be installed side by side on a support according to Figure1DV as in normal use, together with the required accessories and the minimum gauge no.2 or no. 5 inserted according to table A.1. A dummy fuse-link made of copper alloy, platedor un-plated, is permissible.8.4.5DV.1 D2 Ad

39、dition:A variation of less than 1 K between any two out of three consecutive measurements madeat an interval of 5 min is considered as steady temperature.8.4.7DV D2 Modification:For the USA, Subclause 8.4.7DV of Annex DVA, Item A applies.OCTOBER 14, 2011NATIONAL DIFFERENCES FOR UL UL 60947-7-38UL CO

40、PYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL8.4.8DV D2 Addition:Temperature-rise for screwless and insulation displacement terminal blocksSubclause 8.4.7DV.1.2 of Annex DVA, Item A applies.8.4.9DV D2 Addition:Ageing test for insulation displace

41、ment terminal blocksSubclause 8.4.7DV.2 of Annex DVA, Item A applies.8.5.1DV D2 Addition: thermoplastic insulator stress relief test (8.5.5DV)8.5.2DV D2 Deletion:For Canada and USA subclause 8.5.2 does not apply.8.5.3DV D2 Deletion:For the United States, subclause 8.5.3 does not apply.8.5.4DV D2 Del

42、etion:For the United States, subclause 8.5.4 does not apply.8.5.5DV D2 Addition:Thermoplastic insulator stress relief testSubclause 8.7DV of Annex DVA, Item A applies.Table C.1DV D2 Addition:Table C.1 or Table C.1DV appliesOCTOBER 14, 2011 NATIONAL DIFFERENCES FOR UL UL 60947-7-3 9UL COPYRIGHTED MAT

43、ERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULTable C.1DV Order of tests and number of specimensTest group Test no. Number ofspecimensTest According tosubclause1 1.1 2 of 5 Attachment of the fuse terminal blockon its supporta8.3.22 2 of 5 Mechanical propertie

44、s of clamping units2.1 Contact resistancea8.4.42.2 Test of mechanical strength of clampingunits8.3.3.12.3 Contact resistancea8.4.43 3.1 2 Test for damage and accidentalloosening of conductors of a fuseterminal block (flexion test)8.3.3.23.2 Pullout test 8.3.3.34 4.1 1 Verification of rated cross-sec

45、tion andrated connecting capacitya8.3.3.45 5.1 1 Compatibility between fuse terminalblocks and the fuse-linka8.3.46 6.1 1 Torque test on screw-type fuse-carriersa8.3.5.17 7.1 1 Pull-out test on screw-type and bayonet-type fuse-carriersa8.3.5.28 8.1 1 Actuating forces on plug-on type orhinged-type fu

46、se-carriersa8.3.5.39 9.1 6 Tab pull test 8.3.6DV10 10.1 1 Solid-wire Tightening Test 8.3.7DV11 11.1 2 Verification of clearances and creepagedistances8.4.2DV12 12.1 5 Dielectric Test 8.4.3DV12.2 5 Dielectric tests Test Aa8.4.3.2.212.3 Dielectric tests Test Ba8.4.3.2.313 13.1 5 Contact resistancea8.4

47、.414 14.1 3 Temperature rise of clamping units 8.4.5DV15 15.1 2 Contact resistancea8.4.415.2 Aging test for screwless-type fuseterminal blocks8.4.7DV15.3 Contact resistancea8.4.415.4 Pullout testa8.3.3.316 6 connections Temperature-rise for screwless andinsulation displacement fuse terminalblocks16.

48、1 Conditioning 8.4.8DV16.2 Temperature rise 8.4.8DV16.3 Dielectric test 8.4.3DV16.4 Dielectric tests Test Aa8.4.3.2.216.5 Dielectric tests Test Ba8.4.3.2.317 17.1 4 connections Aging test for insulation displacementfuse terminal blocks8.4.9DV18 1 separate/ 5compoundarrangementRated power dissipation

49、a8.5.218.1 Overload and short-circuit protectiona8.5.2.218.2 Exclusive short-circuit protectiona8.5.2.319 19.1 3 Durabilitya8.5.320 20.1 3 Needle flame testa8.5.421 21.1 1 Thermoplastic insulator stress relief test 8.5.5DVOCTOBER 14, 2011NATIONAL DIFFERENCES FOR UL UL 60947-7-310Table C.1DV Order of tests and number of specimens Continued on Next PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULTable C.1DV Order of tests and number of specimens ContinuedTest group Test no. Number ofspecimensT