Poly phase solid state watt hour meters

Details Poly phase solid state watt hour meters Poly phase solid state watt hour meters

2008-10-24

2010-06-15

Tang, Minh N (Department: 2829)

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Plural inputs

C324S126000

Reexamination Certificate

active

07737679

ABSTRACT:
An electronic energy meter includes a first sigma delta modulator having an electrically isolated digital data output. A power supply stage coupled to a first electrical line provides a supply voltage to the first sigma delta modulator. A shunt device is also coupled to the first electrical line. The first sigma delta modulator is coupled via an input to the shunt device for measuring a current through the first electrical line. The electrically isolated digital output is isolated by a capacitive isolation barrier.

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patent: 6646430 (2003-11-01), Skerritt et al.
patent: 6781360 (2004-08-01), Dragoi et al.
patent: 2 412 511 (2001-06-01), None
patent: 2 431 475 (2005-10-01), None

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