SELF-PHASING ELECTRIC METER AND AUTOMATION SYSTEM
First Claim
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1. A method, comprising:
- receiving a plurality of voltage inputs and a plurality of current inputs by an energy meter and from a multiphase power source;
selecting a first voltage input from the plurality of voltage inputs by the energy meter;
performing a signed power factor computation between respective pairs of the first voltage input and each of the plurality of current inputs by the energy meter;
identifying a pair with a greatest positive power factor value by the energy meter; and
designating the identified pair with the greatest positive power factor value as an associated phase pair by the energy meter.
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Abstract
Building automation systems, energy meters, and associated methods. A method includes receiving a plurality of voltage inputs and a plurality of current inputs from a multiphase power source. The method includes selecting a first voltage input from the plurality of voltage inputs. The method includes performing a signed power factor computation between respective pairs of the first voltage input and each of the plurality of current inputs. The method includes identifying a pair with a greatest positive power factor value. The method includes designating the identified pair with the greatest positive power factor value as an associated phase pair.
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Citations
20 Claims
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1. A method, comprising:
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receiving a plurality of voltage inputs and a plurality of current inputs by an energy meter and from a multiphase power source; selecting a first voltage input from the plurality of voltage inputs by the energy meter; performing a signed power factor computation between respective pairs of the first voltage input and each of the plurality of current inputs by the energy meter; identifying a pair with a greatest positive power factor value by the energy meter; and designating the identified pair with the greatest positive power factor value as an associated phase pair by the energy meter. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An energy meter, comprising:
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a plurality of voltage input connections and a plurality of current input connections; a controller operatively connected to the voltage input connections and the current input connections; and a memory operatively connected to the controller, wherein the energy meter is configured to; receive a plurality of voltage inputs at the voltage input connections and a plurality of current inputs at the current input connections, from a multiphase power source; select a first voltage input from the plurality of voltage inputs; perform a signed power factor computation between respective pairs of the first voltage input and each of the plurality of current inputs; identify a pair with a greatest positive power factor value; and designate the identified pair with the greatest positive power factor value as an associated phase pair. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A building automation system, comprising:
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a site controller; and an energy meter having a plurality of voltage input connections and a plurality of current input connections, a controller operatively connected to the voltage input connections and the current input connections, and a memory operatively connected to the controller, wherein the energy meter is configured to; receive a plurality of voltage inputs at the voltage input connections and a plurality of current inputs at the current input connections, from a multiphase power source; select a first voltage input from the plurality of voltage inputs; perform a signed power factor computation between respective pairs of the first voltage input and each of the plurality of current inputs; identify a pair with a greatest positive power factor value; and designate the identified pair with the greatest positive power factor value as an associated phase pair. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification