Circuit breaker with digital solid-state trip unit with optional functions
US4694373A · kind A · utility
106Cited by
7References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 10, 1986 |
| Grant date | Sep 15, 1987 |
| Priority date | — |
| Expiry date | Feb 10, 2006 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02H3/006
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Digital solid-state trip unit designed to provide protection against phase faults, notably overloads and short-circuits and optional functions, in this case ground fault protection and load shedding and restoring functions. Two parameter input switches (72, 74) are assigned to the optional functions to display, in the ground protection option the ground protection pick-up and the ground protection time delay, and in the load shedding option, the load restoring pick-up and the load shedding pick-up. Each option has a software program stored in a non-volatile memory corresponding to it.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.