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    Programmable electrical energy meter and methods therefor
    2.
    发明专利
    Programmable electrical energy meter and methods therefor 未知

    公开(公告)号：AU3130193A

    公开(公告)日：1993-09-13

    申请号：AU3130193

    申请日：1992-11-05

    Applicant: ABB INC

    Inventor： MUNDAY MARK L ,  HEMMINGER RODNEY C

    IPC: G01R13/02 ,  G01R21/133 ,  G01R22/00 ,  G06Q30/00 ,  H02J13/00 ,  G06F15/20 ,  G06F15/21

    Abstract: An apparatus for electronically metering electrical energy, said electrical energy comprising voltage and current characteristics, wherein voltage and current signals representative of said voltage and current characteristics are provided. The apparatus comprises a first processor, connected to receive said voltage and current signals, for determining electrical energy from said voltage and current signals and for generating an energy signal representative of the electrical energy determination, said first processor comprising a memory for the storage of instructions, said first processor performing electrical energy determinations in response to the execution of said instructions. A modification means, is connected to said first processor, for modifying the instructions executed by said first processor; and an optical port, is connected to said modification means, for receiving and transmitting radiant energy signals; and an option connector, is connected to said modification means, for receiving and transmitting electrical signals, wherein an execution signal is received by one of said optical port and said option connector to modify the instructions executed by said first processor.

    AN ELECTRONIC METER FOR METERING ELECTRICAL ENERGY AND THE METHOD THEREOF
    7.
    发明专利
    AN ELECTRONIC METER FOR METERING ELECTRICAL ENERGY AND THE METHOD THEREOF 未知

    公开(公告)号：HK1023619A1

    公开(公告)日：2000-09-15

    申请号：HK00102672

    申请日：2000-05-03

    Applicant: ABB INC

    Inventor： HEMMINGER RODNEY C ,  ROGERS PETER RICHARD

    IPC: G01R21/133 ,  G01R11/32 ,  G01R22/00 ,  G01R

    Abstract: Methods and apparatus for metering electrical energy are disclosed in an electronic meter which includes a first oscillator for generating a first clock signal to within a first accuracy and a second oscillator for generating a second clock signal within a second accuracy. A processor, operable in relation to a clock signal, measures time and periodically compensates for the accuracy of the first oscillator. The first clock signal is used for measuring time when power is applied to the meter and the second clock signal is used by the processor for measuring time when power has been removed from the meter. The accuracy of the first oscillator is compensated periodically in relation to a compensation factor stored in memory. In one embodiment, the processor includes a counter for counting from a first value to a second value in response to the first clock signal. In such an arrangement, the processor substitutes the first compensation factor for the first value. The meter can further include a timer, wherein the processor substitutes the first compensation factor for the first value in response to the first timer. The processor also is shown to implement a process for compensating for the accuracy of the second oscillator. This process compensates for the accuracy of the second oscillator in relation to the first oscillator. To this end, the process calculates a second compensation factor. The second compensation factor is determined when power is applied to the meter, wherein after power has been removed and restored, the second compensation factor is used to compensate time measured in relation to the second oscillator during the period power had been removed.

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