Device for preventive detection of faults with recognition of the type of load
US5910875A · kind A · utility
37Cited by
1References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 5, 1997 |
| Grant date | Jun 8, 1999 |
| Priority date | — |
| Expiry date | Aug 5, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY04S40/121
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The device comprises an electronic switch able to temporarily connect a load to an AC power supply system so as to apply the power system voltage to the load during a test phase corresponding to a half-wave of the power system voltage. A control circuit of the electronic switch measures the output current and voltage of the device and calculates the load impedance. It compares the variation of the load impedance during the test phase to curves representative of different types of load. The device performs preventive overload detection by estimating the rated power of the load according to the type of load detected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.