Fig. 4.6 Fig. 4.7 4.1.5.4 LCD Interfacing diagram The diagram below gives the interfacing configuration of the LCD with the microcontroller. Energy Metering Circuit: This enrgy meter is manly built around the IC 7751, an ANALOG DEVICE ELECTRONIC ENERGY METERING IC, which converts the analog input energy reading into output as pulse for displaying the count value which is equivalent to the energy consumption. In addition to monitoring the energy consumption and data transmission & reception, the meter also provides protection against high voltage, over current and theft by immediately disconnecting metering circuit from the supply and altering the consumer by giving an audible alarm, so that the consumer or maintenance personal to take corrective action. This circuit takes two current samples in terms of voltage form then takes one voltage sample, and then generates a series of pulses depending upon the load connected. It contains analog to digital converter section internal to it, and it also ahs its own reference, it work s on the fixed frequency source generated by the crystal connected to it externally. There is also fault detection facility provided in the metering IC, So whenever the two currents i.e. Phase and neutral, differs by the value more than 12% fault indication is provided.
Fig. 4.6 Fig. 4.7 4.1.5.4 LCD Interfacing diagram The diagram below gives the interfacing configuration of the LCD with the microcontroller. Energy Metering Circuit: This enrgy meter is manly built around the IC 7751, an ANALOG DEVICE ELECTRONIC ENERGY METERING IC, which converts the analog input energy reading into output as pulse for displaying the count value which is equivalent to the energy consumption. In addition to monitoring the energy consumption and data transmission & reception, the meter also provides protection against high voltage, over current and theft by immediately disconnecting metering circuit from the supply and altering the consumer by giving an audible alarm, so that the consumer or maintenance personal to take corrective action. This circuit takes two current samples in terms of voltage form then takes one voltage sample, and then generates a series of pulses depending upon the load connected. It contains analog to digital converter section internal to it, and it also ahs its own reference, it work s on the fixed frequency source generated by the crystal connected to it externally. There is also fault detection facility provided in the metering IC, So whenever the two currents i.e. Phase and neutral, differs by the value more than 12% fault indication is provided.
85295912-Energy-Metering-Circuit-Using-GSM-Semi-Report.docx