Explain operation of µP based relay with block diagram
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Operation of Microprocessor (µP) based relay:

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The inputs from the power system through CTs and PTS are received by the analog Input receiver; they are sampled simultaneously or sequentially at uniform time intervals. They are then converted into digital form through A/D converter and transferred to micro-processor. Digital signals are in the form of coded square pulses which represent discrete data. The signals are fed to micro-processor which is being set with the recommended values, compares the dynamic inputs and decides accordingly to generate trip/alarm signal to the output device.

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