Multiple redundant suppression devices with provision of supervi

Details Multiple redundant suppression devices with provision of supervi Multiple redundant suppression devices with provision of supervi

1983-07-13

1985-05-28

Crosland, Donnie L.

Communications: electrical

Condition responsive indicating system

With particular system function

340506, 340590, 340653, 169 23, 169 60, G08B 2900, A62C 3718

Patent

active

045203482

ABSTRACT:
An electrical protection system including a plurality of suppressor units each activatable by either a first or a second electrical current responsive activator to suppress abnormal condition. The system further includes a supervisory electrical current source, an activation electrical current source, a first connector circuit connecting all of the first activators in series and a second connector circuit connecting all of the second activators in series. A control circuit connects the supervisory source in parallel with the first and second connector circuits so as to provide in each a predetermined supervisory current that is insufficient to energize the activators. Included in the control circuit is an initiator device for selectively connecting the activation source to the first and second connector circuits so as to provide therethrough an activation current flow greater than the supervisory current flow and sufficient to energize the activators and thereby activate the suppressor units to suppress the abnormal conditions. Also included in the control circuit is a monitor system for monitoring the supervisory current flow through each of the first and second connector circuits.

REFERENCES:
patent: 4013128 (1977-03-01), Davis
patent: 4101887 (1978-07-01), Osborne

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