Intelligent electronic device and method thereof
First Claim
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1. An intelligent electronic device, comprising:
- a metering module that measures at least one parameter of an AC electrical service; and
a processing module that processes data obtained using the metering module, the processing module performs calibrating measurements of the at least one parameter at a plurality of calibrating points at a plurality of calibrating frequencies,wherein results of measuring the at least one parameter are linearly interpolated using data of the calibrating measurements at the calibrating frequencies adjacent to a data point of the at least one parameter.
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Abstract
An intelligent electronic device (IED) having a gain control unit adapted to selectively regulate operating ranges of output signals of a sensing circuit of the device is described. In one embodiment, the IED is a digital electric power and energy meter, which operating ranges for supply voltages and supply currents of electrical services may be adjusted to match pre-determined ranges for input signals of a data acquisition system or a data processing module of the meter.
177 Citations
20 Claims
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1. An intelligent electronic device, comprising:
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a metering module that measures at least one parameter of an AC electrical service; and a processing module that processes data obtained using the metering module, the processing module performs calibrating measurements of the at least one parameter at a plurality of calibrating points at a plurality of calibrating frequencies, wherein results of measuring the at least one parameter are linearly interpolated using data of the calibrating measurements at the calibrating frequencies adjacent to a data point of the at least one parameter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of measuring at least one parameter of an AC electrical service using an intelligent electronic device, comprising:
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performing calibrating measurements of the at least one parameter at a plurality of calibrating points at a plurality of calibrating frequencies using certified sources of the at least one parameter; and linearly interpolating results of measuring the at least one parameter using data of the calibrating measurements performed at the calibrating frequencies adjacent to a data point of the at least one parameter. - View Dependent Claims (12, 13, 14, 15)
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16. An intelligent electronic device comprising:
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a sensing circuit having one or more sensors for sensing at least one parameter of an AC electrical service, each of the one or more sensors generating a first signal representative of the sensed parameter; a plurality of calibration factors stored in the one or more computer-readable storage devices, the plurality of calibration factors corresponding to a plurality of calibration measurements, the plurality of calibration measurements comprising measurements of a second signal representative of a known value of the parameter at a plurality of signal amplitudes in each of a plurality of calibration signal frequencies; and a processor that determines a calibrated value for a measured data point using interpolation of the results of the plurality of calibration measurements. - View Dependent Claims (17, 18, 19, 20)
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Specification