Multiple redundant suppression devices with provision of supervision and fault correction
US4520348A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 13, 1983 |
| Grant date | May 28, 1985 |
| Priority date | — |
| Expiry date | Jul 13, 2003 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA62C37/36
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
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…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.