Circuit interrupter with digital trip unit and style designator circuit
US4331998A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 15, 1980 |
| Grant date | May 25, 1982 |
| Priority date | — |
| Expiry date | Apr 15, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B2219/25114
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A circuit breaker includes a microprocessor-based trip unit and a designator circuit including a plurality of jumper positions. Each jumper position corresponds to one digit of a four digit style number specifying which of a plurality of optional functions and features are incorporated in the specific trip unit. Each jumper position is a multitap voltage divider. Selection of one tap on each of the jumper positions causes a set of four analog voltages to be supplied to the trip unit. An analog-to-digital converter converts the analog voltages to a series of digital representations which are interpreted by the microcomputer as a style number used to command execution of a discrete set of instruction groups, with each instruction group corresponding to one of the optional functions and features.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.