Circuit arrangement for reducing the residual voltage on partially disconnected loads
US4575641A · kind A · utility
3Cited by
2References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 25, 1984 |
| Grant date | Mar 11, 1986 |
| Priority date | — |
| Expiry date | May 25, 2004 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K17/30
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
This invention is concerned with a circuit arrangement for reducing the residual voltage on partially disconnected loads, such as control coils of electromagnetic switchgear having long control lines, by connecting an auxiliary load in parallel to the load. According to the invention, a constant-current sink is connected in parallel to the load as an additional load, which is dependent on a control circuit that the circuit closes when the applied voltage is below a predetermined value and breaks when it exceeds a predetermined value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.