Overvoltage protection device
US5233497A · kind A · utility
6Cited by
2References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 12, 1991 |
| Grant date | Aug 3, 1993 |
| Priority date | — |
| Expiry date | Jul 12, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02H9/041
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A protection device against overvoltages liable to occur between two supply terminals (A, B) comprises between the terminals, on the one hand, a thyristor (Th) and, on the other hand, first and second zener diodes in series. The anode of the first diode (D1) is connected to the cathode of the thyristor and the cathode of the second diode (D2) is connected to the anode of the thyristor, and a third zener diode (D3) is placed between the thyristor gate and the junction (10) of the first and second diodes. The third diode has an avalanche voltage higher than that of the first diode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.