US Patent No: 6,493,644

Number of patents in Portfolio can not be more than 2000

A-base revenue meter with power quality features

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Abstract

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Power quality detection, monitoring, reporting, recording and communication in a revenue accuracy electrical power meter is disclosed. Transient events are detected by monitoring the wave shape of the electrical power and comparing deviations to a known threshold. Sags and Swells are detected by computing root mean square value over a rolling window and comparing the computed value with a known threshold. Harmonic frequencies and symmetrical components are quantified by a known algorithm and compared with a known threshold. Incoming waveforms are stored to memory. All recorded and computed data is moved to non-volatile storage via direct memory access transfer in the event that a power quality event jeopardizes the operating power of the meter. Further, the meter provides a power supply utilizing high and low capacitive storage banks to supply sufficient energy to survive short duration power quality events which jeopardize the meter's operating power.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
POWER MEASUREMENT LTD.SAANICHTON BRITISH COLUMBIA86

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Antoniou, Constantine A British Columbia, CA 5 226
Gunn, Colin N British Columbia, CA 23 766
Jonker, Rene T British Columbia, CA 15 550
Przydatek, Piotr B British Columbia, CA 13 644
Teachman, Michael E British Columbia, CA 23 1685

Cited Art Landscape

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* Cited By Examiner

Patent Citation Ranking

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Patent Info (Count) # Cites Year
 
Other [Check patent profile for assignment information] (4)
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QUALCOMM INCORPORATED (1)
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Electro Industries/Gauge Tech (32)
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SCHWEITZER ENGINEERING LABORATORIES, INC. (2)
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XEROX CORPORATION (1)
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Power Measurement Ltd. (21)
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6,798,190 Compact intelligent electronic device incorporating transformers 27 2003
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* Cited By Examiner