Patent ID: 7337081

Claim:
A metering device of a power substation operating on a secondary analog waveform output by a transformer assembly receiving a primary waveform, the metering device comprising: a transformer of the metering device for stepping down the secondary waveform and generating an output signal; first biasing circuitry for operating on the signal output from the transformer of the metering device for generating a corresponding first digital signal having a value proportional to the signal output from the transformer and within a first range; second biasing circuitry for operating on the signal output from the transformer of the metering device for generating a corresponding second digital signal having a value proportional to the signal output from the transformer of the metering device and within a second range; and a processor assembly in operative communication with the first and second biasing circuitry, wherein the processor assembly executes application software for receiving the first and second digital signals, the processor assembly comprising: a first operational software block for processing the first digital signal and outputting a corresponding first output signal; a second operational software block for processing the second digital signal and outputting a corresponding second output signal; and a control software block for processing the first and second output signals and generating corresponding output wherein at least one of the first operational software block, the second operational software block and the control software block monitors at least one software block of the other software blocks for detecting an abnormal condition and resets the software block of the at least one software block associated with the detected abnormal condition.