Overload protection circuit
US5696391A · kind A · utility
14Cited by
5References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 5, 1995 |
| Grant date | Dec 9, 1997 |
| Priority date | — |
| Expiry date | May 5, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10D89/60
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A protection device against overloads that may occur on an interface between a telephone exchange and line switches connected to a subscriber's line, comprises a single protection circuit on the subscriber side of the line switches with respect to the interface. The overvoltage protection circuit ensures an overvoltage protection when the line switches are off, and an overcurrent protection when the switches are on. A controlled switch, disposed between each conductor and ground, is switched on in response to the detection of an overvoltage or overcurrent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.