Surge arrester with a gas-filled housing

Details Surge arrester with a gas-filled housing Surge arrester with a gas-filled housing

1983-02-28

1985-01-08

Salce, Patrick R.

Electricity: electrical systems and devices

Safety and protection of systems and devices

High voltage dissipation

361129, 313581, 313620, 313596, 313355, H02H 906

Patent

active

044930046

ABSTRACT:
A surge arrester, includes a gas-filled housing, copper electrodes disposed opposite each other in the housing, the electrodes each including a relatively thin-walled truncated conical part having a flange integral therewith and a solid cylindrical part, the cylindrical parts each having a respective end surface facing each other, the end surfaces being mutually spaced apart by a given distance and each having a trough-shaped axially-symmetrical depression formed therein, a highly active electrode activating compound filling each of the depressions, a tubular ceramic insulator at least partly surrounding the electrodes defining respective annular gaps between the insulator and each of the cylindrical parts having widths being substantially between 0.2 mm and 0.4 mm, the gaps including rear spaces being low in vapor depositions, the insulator having end surfaces being vacuum-tightly hard soldered to the flanges, and at least one ignition line disposed on the insulator and respectively projecting into each of the gaps and into the rear spaces by at least 1.5 mm, the given distance between the end surfaces of the cylindrical parts being at most 3.5 times the width of one of the gaps in vicinity of the at least one ignition line, the electrodes defining a discharge space including the gaps having a volume of at least 20 mm.sup.3.

REFERENCES:
patent: 3818259 (1974-06-01), Jensen
patent: 4037266 (1977-07-01), English et al.
patent: 4084208 (1978-04-01), Bazarian et al.
patent: 4266260 (1981-05-01), Lange et al.
patent: 4283747 (1981-08-01), Perkins, Jr.

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