VACUUM BULB FOR AN ELECTRICAL PROTECTION APPARATUS, SUCH AS A SWITCH OR A CIRCUIT BREAKER

申请公布号：: CA2612730(A1)
申请号：: CA20062612730
申请日期：: 2006.06.06
申请公布日期：: 2007.01.11
申请人：: SCHNEIDER ELECTRIC INDUSTRIES SAS
发明人：: YVARS, BERNARD;CARDOLETTI, OLIVIER;SCHELLEKENS, HANS;OLIVE, SERGE
分类号：: H01H33/66
主分类号：: H01H33/66
摘要：: The invention relates to a vacuum bulb for an electrical protection apparatu s, 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 mount ed between the two contacts (1, 2) and a partial screen (8, 10) which is dispos ed 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) move s 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).