Electrical phase checking apparatus and method of metering

Details Electrical phase checking apparatus and method of metering Electrical phase checking apparatus and method of metering

2007-08-01

2009-11-03

Nguyen, Vincent Q (Department: 2831)

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Phase comparison

C324S142000

Reexamination Certificate

active

07612552

ABSTRACT:
An electrical phase checking apparatus includes a first voltage sensor, a first current sensor, a first binary indicator corresponding to the first voltage and current sensors, a second voltage sensor, a second current sensor, and a second binary indicator corresponding to the second voltage and current sensors. The first binary indicator is configured to indicate when a phase separation between a voltage waveform measured by the first voltage sensor and a current waveform measured by the first current sensor is not more than a first value, and the second binary indicator is configured to indicate when a phase separation between a voltage waveform measured by the second voltage sensor and a current waveform measured by the second current sensor is not more than a second value.

REFERENCES:
patent: 6397155 (2002-05-01), Przydatek et al.
patent: 2004/0021452 (2004-02-01), Hwang et al.
patent: 2007/0200552 (2007-08-01), Fritz
Description of Veris Industries H8035/8036 Series (located at www.veris.com/file—uploads/h8035-3b—d.pdf).
Description of Summit Technology SureStart (tm) (located at www. summittechnology.com/surestart.shtml).

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