Line protector having arrester and fail-safe circuit bypassing t

Details Line protector having arrester and fail-safe circuit bypassing t Line protector having arrester and fail-safe circuit bypassing t

1979-07-16

1981-08-25

Salce, Patrick R.

Electricity: electrical systems and devices

Safety and protection of systems and devices

High voltage dissipation

361119, 337 32, H02H 906

Patent

active

RE0307246

ABSTRACT:
A line protector has an arrester through which overvoltages on the line of short duration are grounded. The arrester may be of the type having an arc gap sealed within a gas tube. For an overvoltage of longer duration, a pellet is melted causing a spring to close a circuit bypassing the gas tube and provide a direct metallic path from the line to ground. A secondary arc gap between opposed conductors separated by an insulating sleeve has an arc-over voltage that is greater than the normal arc-over voltage of the first-mentioned arc gap and provides a path to ground for short duration overvoltage conditions in the event of failure of the arrester. Excessive current across the secondary arc gap may melt the insulator sleeve and engage the opposed conductors for grounding purposes.

REFERENCES:
patent: 1200796 (1916-10-01), Arnold
patent: 1201646 (1916-10-01), Steinmetz
patent: 3254179 (1966-05-01), Howard
patent: 3254181 (1966-05-01), Lemieux
patent: 3543207 (1970-11-01), Kawiecki
patent: 3569786 (1971-03-01), Kunugi
patent: 3651380 (1972-03-01), Peche et al.
patent: 3651440 (1972-03-01), Bahr et al.

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