H - Electricity – 01 – H
Patent
H - Electricity
01
H
H01H 33/66 (2006.01)
Patent
CA 2612730
The invention relates to a vacuum bulb for an electrical protection apparatus, such as a switch or a circuit breaker. The inventive bulb comprises at least three screens (8, 9, 10) including a mid-potential screen (9) which is mounted between the two contacts (1, 2) and a partial screen (8, 10) which is disposed between the mid-potential screen (9) and one of the contacts (1, 2), the distance between the mid-potential screen (9) and the contacts (1, 2) being selected such that the electric field at the edge of the contact (1, 2) moves from the contact (1, 2) towards the surrounding partial screen (8, 10) (or vice versa from the partial screen towards the contact, as a function of the polarity of the voltage).
Cette ampoule comporte au moins trois écrans (8,9,10) comprenant un écran dit à mi- potentiel (9) monté entre les deux contacts (1,2) et au moins un écran dit partiel (8,10) intercalé entre ledit écran à mi-potentiel (9) et l'un des contacts (1,2), la distance entre ledit écran à mi-potentiel (9) et les contacts (1,2) étant choisie de manière que le champ électrique présent au bord du contact (1,2) passe du contact (1,2) vers l'écran partiel (8,10) l'entourant (ou inversement de l'écran partiel vers le contact en fonction de la polarité de la tension).
Cardoletti Olivier
Olive Serge
Schellekens Hans
Yvars Bernard
Robic
Schneider Electric Industries Sas
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