Apparatus for metering electrical power that determines energy usage data based on downloaded information
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United States of America Patent
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Nov 19, 2002
Issued Date -
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app pub date -
Mar 26, 1998
filing date -
Feb 21, 1992
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Abstract
An apparatus for metering electrical power includes a first processor which receives analog voltage and current signals and converts the analog voltage and current signals to respective digital voltage and current signals, a second processor which receives the energy signal and converts an energy signal into energy usage data, and a non-volatile memory coupled to the second processor for storing calibration constants and energy formula associated with a plurality of meter forms, such that some of the energy formula and calibration constants are downloaded from the non-volatile memory to the second processor. The first and second processors cooperate to determine the energy usage data based on the energy formula and calibration constants downloaded to the second processor, and the apparatus measures at least one of real power, reactive power, and apparent power based on energy formula and calibration constants associated with the plurality of meter forms. In addition, the first processor processes the digital voltage and current signals to generate the energy signal representative of a quantity of power and the second processor provides control functions within the apparatus. Further, the analog voltage signals are received by a resistive divider network and the current signals are received by a current transformer.
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- 15 United States
- 10 France
- 8 Japan
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Patent Owner(s)
- ELSTER ELECTRICITY, LLC
International Classification(s)
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- [Patents Count]
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
---|---|---|---|
Hemminger, Rodney C | Raleigh, NC | 57 | 2881 |
Munday, Mark L | Raleigh, NC | 34 | 1447 |
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Fee | Large entity fee | small entity fee | micro entity fee | due date |
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Fee | Large entity fee | small entity fee | micro entity fee |
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Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |
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