Patent ID: 8682603

Claim:
A substation instrument control system comprising: a plurality of transformers; wherein the plurality of transformers generate a plurality of waveform signals representing electric properties of a substation instrument main body; a merging unit communicatively coupled to the plurality of transformers comprising a signal processing unit and a control unit; wherein the signal processing unit receives the plurality of waveform signals from the plurality of transformers; wherein the signal processing unit converts the plurality of waveform signals to a digital signal; wherein the control unit controls operation of the signal processing unit using a setting data; an intelligent electronic device communicatively coupled to the merging unit; wherein the intelligent electronic device receives the digital signal from the merging unit; a memory, wherein the memory stores setting data; a clock generating circuit, wherein the dock generating circuit controls at least one of a switching timing of a multiplexer in the signal processing unit and a sampling timing of an A/D converter in the signal processing unit; and a communication port, wherein the communication port at least one of transmits the digital signal from the merging unit to the intelligent electronic device and transmits setting data from the intelligent electronic device to the control unit.