Electricity: electrical systems and devices – Safety and protection of systems and devices – High voltage dissipation
Patent
1997-06-20
1998-10-06
Gaffin, Jeffrey A.
Electricity: electrical systems and devices
Safety and protection of systems and devices
High voltage dissipation
361118, H02H 100
Patent
active
058186778
ABSTRACT:
A surge arrester (1) includes varistor elements (2) forming a stack (3) and having opposed end surfaces (4a, 4b). The varistor stack is electrically connected via the opposed end surfaces to end terminals (7a, 7b) having circumferential ridges (32a, 32b), which, in the event of failure of the varistor elements, are designed to relocate the resulting arc and direct it in a manner which reduces or minimizes damage to the surge arrester. The ridges serve as damage-tolerant sacrificial rooting points for an arc in the event of varistor element failure by presenting a substantial metal mass for the arc to erode away.
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Bennett Jeffrey A.
Cooper Chuck F.
Mattis John Seymour
Robinson William M.
Burkard Herbert G.
Chao Yuan
Gaffin Jeffrey A.
Raychem Corporation
Sherry Michael J.
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