Overvoltage protection device

Details Overvoltage protection device Overvoltage protection device

1983-04-28

1985-10-01

Salce, Patrick R.

Electricity: electrical systems and devices

Safety and protection of systems and devices

High voltage dissipation

361 56, 361111, 361124, H02H 906

Patent

active

045449830

ABSTRACT:
An overvoltage protection device, for protecting communications equipment against hazardous voltages cue to lightning or power surges, comprises a primary protector, for example a gas tube device, and a back-up protector connected in parallel. The back-up protector includes a semiconductor pn junction, and is preferably a pair of diodes back-to-back. The back-up protector has a breakdown voltage slightly higher than that of the primary protector and is arranged to fail short-circuit once it has operated so as to provide an indication that the primary protector failed to operate.

REFERENCES:
patent: 2793331 (1957-05-01), Lamb
patent: 3558830 (1971-01-01), Bender
patent: 3934175 (1976-01-01), Clark
patent: 3946278 (1976-03-01), Hufnagel
patent: 4023071 (1977-05-01), Fussell
patent: 4327393 (1982-04-01), Hines et al.
patent: 4389695 (1983-06-01), Carpenter, Jr.

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