Electrical power metering device and method of operation thereof
AssigneeIntellimeter Canada, Inc.
InventorsPhilip Tinsley Dempster, Warren Beacom, Richard Qinxue Liang
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Abstract
A metering device for metering energy delivered to customers over electrical wires from a power distribution cabinet. The metering device has a plurality of current transformers, each capable of receiving one of the electrical wires and connections for the line voltages which drive the wires. The current transformers are arranged for physical correspondence to the power outputs of the power distribution cabinet. Circuitry connected to the current transformers and line voltage connections meter the energy over the electrical wires.
Claims31
A metering device for a power distribution cabinet delivering power from power outputs through electrical wires to one or more customers, said metering device comprising:
- a board having a plurality of holes, a hole for receiving at least one of said electrical wires therethrough;
- connections for different line voltages on said board;
- a plurality of current transformers on said board, each current transformer arranged around one of said plurality of holes so as to generate a output signal responsive to a current of an electrical wire through said one hole, said current transformers and said holes arranged for physical correspondence to said power outputs;
- and
- circuitry on said board, said circuitry connected to said current transformers and said voltage connections for metering energy from said power outputs through said electrical wires to one or more of said customers;
- whereby integration of said plurality of current transformers, said line voltage connections and said circuitry into said metering device simplifies installation, reduces installation time, and reduces the possibility of installation error of said metering device.
A metering device for metering energy delivered on electrical wires, said device comprising:
- at least one current transformer arranged to generate a signal in response to current on an electrical wire;
- at least one voltage connection for a line voltage of said electrical wire;
- and
- circuitry connected to said at least one current transformer and said at least one voltage connection sampling said current transformer signal and said line voltage to measure instantaneous energy delivery over said electrical wire, said circuitry including an electronic computing device which acquires at least one internal pair of energy accumulation numbers, one number corresponding to internal energy accumulation by the metering device from said measured instantaneous energy delivery, another number corresponding to external measurement of energy by a reference metering device, and calculates a calibration number to create substantial equivalence between said pair of energy accumulation numbers by a comparison of said two numbers;
- whereby said metering device calibrates measurement of said instantaneous energy delivery over said electrical wire.
Dependencies are inferred from the claim text.