Device for protecting an electric operating means
US5119289A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 12, 1989 |
| Grant date | Jun 2, 1992 |
| Priority date | — |
| Expiry date | Dec 12, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02H3/05
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A protective system for an electrical network includes input and output units (E/A-1, . . . , E/A-7) and a data processing unit. The input and output units detect and digitize incoming analog signals present at outlets (1, . . . , 7) of an electric-operating means which needs to be protected, for instance a bus bar. The digitized measurement signals are hierarchically connected/coupled to the data processing unit, in accordance with predetermined protective criteria. Thus, error signals which are generated in response to the detection of system failures are supplied via the input and output units (E/A-1, . . . E/A-7), and these error signals act upon switching stations provided at the outlets (1, . . . , 7). With each of the outlets, for instance outlet 3, there are associated two input and output units, for instance units E/A-1, and E/A-3, which units operate independently of one another. The data processing unit is in the form of a data-transfer and processing network and includes computers (T.sub.1, . . . , T.sub.6) which act through a plurality of network nodes. The protective device of the invention is characterized by having a high level of redundant circuitry and is modularl…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.