Electric switchgear equipment with detection of unauthorized changes to the setpoints
US5196831A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 19, 1991 |
| Grant date | Mar 23, 1993 |
| Priority date | — |
| Expiry date | Jul 19, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY04S40/12
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Low voltage electric switchgear equipment includes a central processor unit electrically interconnected with electronic main and branch circuit interrupters within the same enclosure and used within a multi-phase power distribution circuit. A terminal connector block is connected by cable with each of the electronic trip units within the branch circuit interrupters to provide communications between the branch circuit interrupters and the main circuit interrupter for continuously updating the status of the branch circuit interrupters and their associated electrical equipment. An operating program within the central processor unit determines whether unauthorized changes to the setpoints stored within individual branch circuit interrupters have occurred and immediately provides indication of such changes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.