IEC_60092-401-1980_amd2-1997.pdf

NORMEINTERNATIONALECEIIECINTERNATIONALSTANDARD60092-4011980AMENDEMENT 2AMENDMENT 21997-04Amendement 2Installations lectriques bord des navires Partie 401:Installation et essais aprs achvementAmendment 2Electrical installations in ships Part 401:Installation and test of completed installationDPour prix,voir catalogue en vigueurFor price,see current catalogueCODE PRIXPRICE CODE IEC 1997 Droits de reproduction rservs Copyright-all rights reservedInternational Electrotechnical Commission3,rue de Varemb Geneva,SwitzerlandTelefax:+41 22 919 0300 e-mail:inmailiec.chIEC web site http:/www.iec.ch Commission Electrotechnique Internationale International Electrotechnical CommissionLICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.2 60092-401 amend.2 CEI:1997AVANT-PROPOSLe prsent amendement a t tabli par le comit dtudes 18 de la CEI:Installationslectriques des navires et des units mobiles et fixes en mer.Le texte de cet amendement est issu des documents suivants:FDISRapport de vote18/813/FDIS18/820/RVDLe rapport de vote indiqu dans le tableau ci-dessus donne toute information sur le vote ayantabouti lapprobation de cet amendement._Page 48Section dix ParatonnerresRemplacer le titre et le texte de la section dix par ce qui suit,et renumroter respectivementles articles 56 69 en 53 66.SECTION DIX PROTECTION CONTRE LA FOUDRE49 GnralitsLa prsente section donne des indications sur les prcautions prendre pour rduire lesrisques de dommages un navire et ses installations lectriques dus la foudre.50 DfinitionsLes dfinitions suivantes sappliquent la prsente section:50.1 dommage primaire de structure:Dommage d un coup de foudre sur les navires quine peuvent prsenter un cheminement de faible rsistance pour le passage de courants defoudre,par exemple les navires non mtalliques ou prsentant majoritairement des parties nonmtalliques.50.2 dommage secondaire:Dommage sur les navires et leurs installations lectriquespouvant tre d aux consquences indirectes dun coup de foudre sur le navire ou saproximit immdiate.Un cheminement la terre de faible rsistance ne peut viter lesconsquences dun dommage secondaire pouvant tre d des valeurs leves de chutes detension induites ou rsistives entranes par le passage de courants de foudre.51 Protection contre les dommages primaires de structure51.1 Systmes de protection51.1.1 Si des systmes de protection sont prescrits,ils doivent comporter des dispositifs decapture,des conducteurs de descente et des mises la terre de manire rduire lventualitde tensions induites dans les cbles lectriques dues au passage de courants de foudre.LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.60092-401 Amend.2 IEC:1997 3 FOREWORDThis amendment has been prepared by IEC technical committee 18:Electrical installations ofships and of mobile and fixed offshore units.The text of this amendment is based on the following documents:FDISReport on voting18/813/FDIS18/820/RVDFull information on the voting for the approval of this amendment can be found in the report onvoting indicated in the above table._Page 49Section ten Lightning conductorsReplace the existing title and text of section ten by the following and renumber clauses 56 to69 as 53 to 66 respectively.SECTION TEN LIGHTNING PROTECTION49 GeneralThis section provides guidance on the measures to be taken to minimize the risks of damageto a ship and its electrical installation due to lightning.50 DefinitionsThe following definitions apply to this section:50.1 primary structural damage:Damage which can result from a stroke of lightning toships which do not provide a path of low resistance to earth for the passage of lightningcurrents,for example ships of non-metallic construction or those having substantialnon-metallic members.50.2 secondary damage:Damage to ships or to their electrical installations which can resultas an indirect consequence of a lightning stroke to a ship or to its immediate vicinity.A path toearth of low resistance may not prevent the consequence of secondary damage which mayoccur as a result of high values of induced or resistance drop voltages produced by thepassage of lightning currents.51 Protection against primary structural damage51.1 Protective systems51.1.1 Where protective systems are required they shall include air terminals,downconductors and earth terminations so installed as to minimize the possibility of voltages beinginduced into electric cables due to the passage of lightning currents.LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.4 60092-401 amend.2 CEI:199751.1.2 Un systme de protection nest pas ncessaire sur un navire mtallique prsentant uncheminement la terre de faible conductivit par les mts,les membrures structurelles et lacoque.51.1.3 Un systme de protection doit tre prvu pour les navires non mtalliques ou dont lastructure est majoritairement non mta