Method for enabling monitoring of power consumption
US7622912B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 10, 2008 |
| Grant date | Nov 24, 2009 |
| Priority date | — |
| Expiry date | Jun 10, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R21/06
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Power consumption at a site is monitored. An electrical load is connected to a power source by an electrical conductor. A fuel-less energy producing device is electrically connected to a junction along the electrical conductor. A current sensor is electromagnetically coupled to the electrical conductor at a sensing position between the power source and the junction to create a current sensor signal. Sensed current and voltage signals are produced from the current sensor signal. A sensed phase relationship between the sensed signals is determined and compared to a baseline phase relationship to determine the direction of current flow through the conductor. A power source signal, based on the current flowing through the conductor at the sensing position, is created. With some examples a Rogowski type differential current sensor is used. In some examples a single current sensor is used.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.