Detection device of an internal arc in a metalclad electrical in

Details Detection device of an internal arc in a metalclad electrical in Detection device of an internal arc in a metalclad electrical in

1991-02-25

1992-12-08

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

25022724, H01J 516

Patent

active

051700506

ABSTRACT:
An optic sensor comprises a transparent rod passing through a wall of a sealed enclosure of a gas-insulated electrical installation. The internally protruding end of the rod comprises frustum-shaped reflecting faces of a light ray parallel to the wall. This ray is reflected perpendicularly to an optic fiber which transmits the signal to an alarm device.

REFERENCES:
patent: 3949226 (1976-04-01), Dugan et al.
patent: 4245154 (1981-01-01), Uehara et al.
patent: 4369364 (1983-01-01), Kuntermann
Elektrotechnische Zeitschrift, vol. 98, No. 7, Jul. 1977, p. 491, P. Gehrmann.

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