Line arrester

Details Line arrester Line arrester

1995-10-31

1997-09-02

Gaffin, Jeffrey A.

Electricity: electrical systems and devices

Safety and protection of systems and devices

High voltage dissipation

361127, 361137, 361138, H02H 100

Patent

active

056638639

ABSTRACT:
An improved line arrester is disclosed that includes a non-linear resistor. The arrester includes a pair of arcing horns are respectively provided on an earth side and a line side of the arrester, with an aerial discharge gap being provided therebetween. The aerial discharge gap is in electrical parallel with the resistor. The length of the aerial discharge gap is selected such that flashover does not occur in response to currents smaller than a rated discharge current of the resistor, yet flashover does occur in response to a current that is greater than the rated discharge current, but lower than a critical discharge current of the resistor. With this arrangement the resistor is protected against the lightning surge current greater than the critical discharge current.

REFERENCES:
patent: 4258407 (1981-03-01), Nagai
patent: 4725917 (1988-02-01), Mori et al.
patent: 4761707 (1988-08-01), Wakamatsu et al.
Patent Abstract of Japan, vol. 3, No. 145, JP-A-54 124 244, Nov. 30, 1979.
Patent Abstract of Japan, vol. 14, No. 258, JP-A-20 67 969, Jun. 4, 1990.

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