Intelligent electronic device and method thereof

摘要

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.

主权项

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.