M. K. Kirar - Department of Electrical Engineering, MANIT, Bhopal

The Internet of Things (IoT) is a multidisciplinary concept that includes a wide range of application domains and device capabilities. The IoT technology provides a platform that allows apparatus to be monitored by sensors, connected using a communication channel, and controlled remotely across a network infrastructure. This paper represents the IoT-based remote monitoring, control, and protection of irrigation water pumping systems. The sensors measure parameters; namely supply voltage and motor current to estimate operating conditions and provide protection. The measured parameters are sent to the user through the SIM۹۰۰ GSM module for remote monitoring and control purposes. The android application has been developed to provide a better user interface, timer-based operation, status of pump and feedback notifications, etc. Protection to the pump (۳-Փ Induction Motor) is provided through an ATmega ۳۲۸P microcontroller embedded in the Arduino Uno board. Appropriate relay characteristics are programmed in the microcontroller for protection against various types of faults like thermal overload, single phasing, under/over voltage, voltage imbalance, reverse rotation. The system is tested in the lab and it is observed that all the protections are working satisfactorily. Single phasing is detected and the supply is tripped within ۰.۱۵ sec, undervoltage protection operated in ۰.۳ sec, and ۵% unbalance in supply voltage is detected successfully and protection is operated within time.

Android app, microcontroller, GSM, IoT, induction motor protection