Power supply monitoring system
US8779776B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 23, 2007 |
| Grant date | Jul 15, 2014 |
| Priority date | — |
| Expiry date | Apr 5, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02H11/005
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method for detecting predetermined fault conditions associated with the supply of AC electrical power to a consumer, the supply having an active conductor and a neutral conductor with the neutral conductor being connected to earth. The method comprises providing a first current detector associated with the active conductor, providing a second current detector associated with the neutral conductor; providing a voltage detector to detect voltage between the active conductor and the neutral conductor, and checking a current ratio of neutral current to active current whereby the current ratio is indicative of a predetermined fault condition. Also disclosed is a method of checking the condition of supply line active and neutral conductors in a consumer's supplied premises including determining the impedance of the active conductor and the impedance of the neutral conductor to indicate the condition of each of the active and neutral conductors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.