CAN/CSA-C71-2-98:2000 Edition
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Coordination de lisolement – Partie 2: Guide dapplication
| Published By | Publication Date | Number of Pages |
| CSA | 2000-02-25 | 268 |
Domaine dapplication
La prƩsente partie de la CEI 71 constitue un guide dapplication et concerne le choix des niveaux disolement des matƩriels ou des installations pour les rƩseaux triphasƩs. Son but est de donner des recommandations pour la dƩtermination des tensions de tenue assignƩes pour les gammes I et II de la CEI 71-1 et de justifier lassociation de ces valeurs assignƩes avec les valeurs normalisƩes des tensions les plus ƩlevƩes pour le matƩriel.
Cette association ne couvre que les besoins de la coordination de lisolement. Les exigences relatives Ć la sĆ©curitĆ© des personnes ne sont pas traitĆ©es dans ce guide dapplication.
Il traite des rĆ©seaux triphasĆ©s de tension nominale supĆ©rieure Ć 1 kV. Les valeurs qui en sont dĆ©duites ou qui y sont proposĆ©es ne sont gĆ©nĆ©ralement applicables quĆ ces seuls rĆ©seaux. Cependant, les principes prĆ©sentĆ©s sont Ć©galement valables pour les rĆ©seaux biphasĆ©s ou monophasĆ©s.
Il traite de lisolement phase-terre, entre phases et longitudinal.
Ce guide dapplication nest pas destinĆ© Ć dĆ©tailler les essais de routine qui seront spĆ©cifiĆ©s par les comitĆ©s de produits concernĆ©s.
Le contenu de ce guide suit strictement lorganigramme de la procĆ©dure de la coordination de lisolement prĆ©sentĆ© Ć la figure 1 de la CEI 71-1. Les articles 2 Ć 5 correspondent Ć chacun des rectangles de lorganigramme et donnent des informations dĆ©taillĆ©es sur les principes de la procĆ©dure de coordination de lisolement qui conduit Ć dĆ©terminer les niveaux de tenue spĆ©cifiĆ©s.
Ce guide insiste sur la nĆ©cessitĆ© de prendre en compte, dĆØs le dĆ©part, toutes les origines, toutes les classes et tous les types de contraintes de tension en service quelle que soit la gamme de la tension la plus Ć©levĆ©e pour le matĆ©riel. Ce nest quĆ la fin de la procĆ©dure, au moment de sĆ©lectionner les tensions de tenue normalisĆ©es, que lon applique le principe de couvrir une contrainte de tension particuliĆØre en service par une tension de tenue normalisĆ©e. Aussi le guide fait-il rĆ©fĆ©rence, Ć cette Ć©tape finale, aux corrĆ©lations Ć©tablies dans la CEI 71-1 entre les niveaux disolement normalisĆ©s et la tension l a plus Ć©levĆ©e pour le matĆ©riel.
Les annexes contiennent des exemples et des informations dƩtaillƩes qui expliquent ou corroborent les principes dƩcrits dans le texte principal, et les techniques analytiques de base qui sont utilisƩes.
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