ELECTRICAL PROTECTION ASSEMBLIES AND SURGE PROTECTIVE DEVICES

    公开(公告)号:EP4339989A1

    公开(公告)日:2024-03-20

    申请号:EP23194818.3

    申请日:2023-09-01

    摘要: An electrical protection assembly includes a semiconductive gap-assisted (SGA) fuse assembly forming an overcurrent protection circuit. The SGA fuse assembly includes a fuse element and a semiconductive gap assembly electrically connected in series with the fuse element. The semiconductive gap assembly includes: a first gap electrode and an opposing second gap electrode; a trigger gap defined between the first and second gap electrodes; and a semiconductive member disposed in the trigger gap. The semiconductive member is configured to assist in initiation of an electrical arc flashover across the trigger gap between the first and second gap electrodes responsive to an overvoltage developed across the first and second gap electrodes.

    OVERVOLTAGE PROTECTION DEVICES INCLUDING WAFER OF VARISTOR MATERIAL

    公开(公告)号:EP4202959A3

    公开(公告)日:2023-07-05

    申请号:EP23156439.4

    申请日:2012-07-26

    IPC分类号: H01C7/12 H01T1/16 H01T1/14

    摘要: An overvoltage protection device includes first (120) and second (130) electrically conductive electrode members and a varistor member (110) formed of a varistor material and electrically connected with each of the first and second electrode members. The overvoltage protection device includes both: an integral first fail-safe mechanism (161) configured to electrically short circuit the first and second electrode members about the varistor member when triggered by a first set of operating conditions; and an integral second fail-safe mechanism (141) configured to electrically short circuit the first and second electrode members about the varistor member when triggered by a second set of operating conditions different from the first set of operating conditions.