Circuit protection arrangement

Details Circuit protection arrangement Circuit protection arrangement

1987-09-03

1989-01-17

Pellinen, A. D.

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific voltage responsive fault sensor

361 56, 361111, 361117, H02H 320

Patent

active

047991259

ABSTRACT:
An arrangement for protecting an electrical circuit from a voltage transient having a fast rise time, e.g. in the order of 20 Vns.sup.-1 comprises a number of semiconductive threshold foldback switching elements, preferably formed from a chalcogenide glass, in parallel with one another between a current carrying line of the circuit and earth. One or more capacitors are connected in series with the switching elements between the current carrying line and earth in order to prevent any direct currents in the current carrying line holding the switching elements in their low resistance state.

REFERENCES:
patent: 3467888 (1969-09-01), Wolf
patent: 3518492 (1970-06-01), Kresge et al.
patent: 4023071 (1977-10-01), Fussell
patent: 4212045 (1980-07-01), Martzloff
patent: 4271446 (1981-06-01), Comstock
patent: 4326232 (1982-04-01), Nishiwaki
patent: 4390919 (1983-06-01), Lasinski
patent: 4463406 (1984-07-01), Sirel
patent: 4571656 (1986-02-01), Ruckman
patent: 4630163 (1986-12-01), Cooper et al.
Physics of Disordered Materials, Plenum Press, 1985 Ed. Adler, Fritzsche and Ovshinsky, pp. 779-792 and 793-809.

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