Microprocessor detection of transient voltage and abnormal line voltage
US6160692A · kind A · utility
18Cited by
2References
31Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 6, 1999 |
| Grant date | Dec 12, 2000 |
| Priority date | — |
| Expiry date | Apr 6, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02H9/042
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method for determining the extent of a transient's ability to cause MOV over heating and subsequent explosion by microprocessor analysis of an AC voltage input waveform with respect to a stored perfect sine wave. The microprocessor also calculates the RMS value of the applied voltage waveform and compares it to stored limits to determine if it could cause over heating of the MOV. In either case, the microprocessor will generate an out-of-range signal to a disconnect device to take the MOV, and also the load, if desired, off line until normal line voltage is restored.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.