A.C. high-voltage switchgear and controlgear. Direct over-current releases.

Avant-propos 3

1 Généralités 4

1.1 Domaine d'application 4

1.2 Objet 4

1.3 Conditions générales d'utilisation 4

1.4 Exécution des essais 4

2 Terminologie 5

3 Spécifications des déclencheurs 6

3.1 Énumération des caractéristiques définissant les conditions d'établissement et de fonctionnement des déclencheurs 6

3.2 Fréquence nominale 6

3.3 Type de fonctionnement d'un déclencheur direct à maximum de courant 6

3.4 Retard de fonctionnement (ou temporisation) 7

3.5 Consommation 7

4 Conditions auxquelles doivent satisfaire les déclencheurs 7

4.1 Échauffement et intensités admissibles de longue durée 7

4.2 Surintensités admissibles lors d'un court-circuit 8

4.3 Conditions de fonctionnement 9

4.4 Essai diélectrique au choc 10

4.5 Tenue à la corrosion 11

5 Indications à porter sur les déclencheurs 12

5.1 Indications communes à tous les types de déclencheurs 12

5.2 Indications qui diffèrent selon le type de fonctionnement 12

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