Surge suppressor having looped clamping elements

Details Surge suppressor having looped clamping elements Surge suppressor having looped clamping elements

1994-03-04

1996-05-14

Pellinen, A. D.

Electricity: electrical systems and devices

Safety and protection of systems and devices

High voltage dissipation

361127, 361117, H01C 7112, H02H 104

Patent

active

055173829

ABSTRACT:
The surge arrester contains two connection fittings (1, 2) which are spaced apart from one another along an axis and between which at least one cylindrical varistor element (7) is arranged. The connection fittings (1, 2) and the at least one varistor element (7) are clamped with one another, accompanied by the formation of contact force, to form a mechanically stable active part of the surge arrester. The active part is surrounded by a cast housing (12) made from insulating material. The clamping of the active part is achieved by at least two loops (5) respectively acting independently of one another on the connection fittings (1, 2). The loops (5) are arranged at a distance from the at least one varistor element (7). The connection fittings (1, 2) contain bearing areas which correspond respectively to the number of the loops (5) and are distributed uniformly about the axis azimuthally and on which a loop end is respectively supported. Despite its simple design, the surge arrester has good mechanical and electrical characteristics and can be produced in a particularly cost-effective way.

REFERENCES:
patent: 4812944 (1989-03-01), Eberhard et al.
patent: 5291366 (1994-03-01), Giese et al.
"Forming Method for Current Limiting Element", Patents Abstracts of Japan, E-862, Dec. 18, 1989, vol. 13, No. 57, Patent No. 1-239814 (Sep. 1989).

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