IEC_81-242ea-INF.pdf

81/242A/INF For IEC use only 2004-08-13 INTERNATIONAL ELECTROTECHNICAL COMMISSION TECHNICAL COMMITTEE No.81:LIGHTNING PROTECTION Revised compilation of comments on 81/239/DC:IEC 62305-1,Ed.1:Protection against lightning-Part 1:General principles Comments were considered by WG 8 at its meeting in July 2004._ This document cancels and replaces document 81/242/INF.2 81/242A/INF Annex Date Document 2004-08-13 81/239/DC National Committee Clause/SubclauseParagraph Figure/Table Type of comment(General/Technical/Editorial)COMMENTS Proposed change OBSERVATIONS OF THE SECRETARIAT on each comment submitted DE The German National Committee agrees without any comments Noted.ES The Spanish National Committee accepts this document as such without comments Noted.FR 1 The present layout of both IEC 62305-3 and IEC 62305-4 is satisfactory.There is no reason to combine IEC 62305-3 the Annex B and IEC 62305-4 Annex E to combine it in IEC 62305-1 new Annex E.Keep both IEC 62305-3 and IEC 62305-4 texts as they are.See IT1 comment.GB The UK national committee does not agree to the proposed changes and believes that the current structure of the 62305 series is more appropriate See IT1 comment.IT 1 General General The Italian NC is in favour of a new Annex to IEC 62305-1 relevant to the surges due different sources of damages.In this way the Annex will comply with the scope of IEC 62305-1“General principles”.Therefore information relevant to requirements for SPDs should leave in IEC 62305-4.Agreed.Indeed matter relevant to lightning currents due to different sources of damage belongs to the scope of IEC 62305-1,but matter relevant to requirements of SPDs belongs to IEC 62305-4 and should leave there.The text of Annex E as agreed by WG 8 is attached.LU Editorial We accept the proposed editorial changes as described in document 81/239/DC Noted.NO The Norwegian NC agree to the proposal in 81/239/DC 1)to delete in IEC 62305-3 the Annex B(informative).2)to delete in IEC 62305-4 the Annex E(informative)and 3)3)to add to IEC 62305-1 a new annex E(informative)Noted.3 81/242A/INF National Committee Clause/SubclauseParagraph Figure/Table Type of comment(General/Technical/Editorial)COMMENTS Proposed change OBSERVATIONS OF THE SECRETARIAT on each comment submitted PL 1 General We generally agree with all three editorial proposals given on p.1 of 81/239/DC but we are completely against the reduction of the content of clause 7 in IEC 62305-4 and in 81/238/CDV.This is a document devoted,between others,to the internal protection of equipment by means of SPD sets.In connection with this an enormously strange situation appears presently,because the principles of this protection have been reduced to two only general references sending the standard user to other standards without exact information on clauses and subclauses,in which the user could find a specific solution of his task.Moreover,it should be mentioned that the revised version of IEC 60364-53 is not yet accepted by TC 64 and that none of the listed standards(IEC 60364-5-53,IEC 61643-12 and IEC 61643-22)is devoted directly to the protection of structures against LEMP,where specific conditions of such protection need to be considered.If our comment is not accepted,the Polish NC will consider casting a negative vote on 81/238/CDV-in this case we would be also against 81/239/DC.Give up the editorial proposals of 81/239/DC if clause 7 of 81/238/CDV remains without adequate completion.See IT 1 comment.4 81/242A/INF National Committee Clause/SubclauseParagraph Figure/Table Type of comment(General/Technical/Editorial)COMMENTS Proposed change OBSERVATIONS OF THE SECRETARIAT on each comment submitted PL 2 General Numbering of equations in 81/239/DC is needed.Add successive numbers for equations.See IT 1 comment.PT The portuguese NC approves 81/239/DC Noted.USA 1 Entire Document General The USNC agrees with the proposal to incorporate Annex B to IEC 62305-3 with Annex E to IEC 62305-4 and move this material to IEC 62305-1.Noted.USA 2 Entire Document Editorial To be consistent with related IEC standards and the definition provided for SPD,more than one SPD should be shown as“SPDs.”Replace“SPD”with“SPDs”throughout the document where the acronym is used to indicate multiple SPDs.Agreed.CN 1 Head Parag.1 E SPD tests not given in IEC60364-1 IEC 61643-11 See IT 1 comment.PL 3 E Paragraphs before E.1 Editorial Hanging paragraph between the title and E.1.Add the title and number(renumber successive clauses).See IT 1 comment.PL 4 E Para 1-line 6 Editorial IEC 60364-1 has nothing to do with such SPD tests.Change to IEC 61643-1.See IT 1 comment.USA 3 Introduction First paragraph First sentence Editorial Mandatory wording may not be used in informative annexes.Change“Shall”to“should”,change“SPD”to“SPDs”and make punctuation as proposed to make sentence easier to understand.Revise first sentence as follows:“For dimensioning of conductors,SPDs,and apparatus;the threat due to surges at the particular installation