Implementation of the IoT-Based Electrical Quantity Monitoring System at the Electrical Installation Laboratory, Metal Industry Polytechnic of Morowali

This study aims to determine the value of electrical quantities in the form of voltage, current, power factor, power, and frequency of resistive loads and inductive loads on single-phase power lines in real-time and accurately at the Electrical Installation Laboratory, Metal Industry Polytechnic of Morowali. This research is made in the form of a prototype of an electric quantity monitoring system that can be obtained in real-time using IoT devices. This research uses several IoT devices, such as the Node MCU ESP8266, PZEM004T sensor, Liquid Crystal Display (LCD) & I2C Interface, as well as internet services in the form of thinkspeak as an interface for IoT-based monitoring results. After doing the testing and analysis, then the magnitude of the voltage, current, power factor, power, and frequency at the electrical load of 2 100 W lamps, 2 75 W lamps, 2 9 W lamps, and 2 750 W induction motors respectively are 226.83 V, 14.6693 A, 0.33, 1.103 kW, and 50.13 Hz. The error between the results of monitoring and measurement is 0.046% at 19.00 WITA and 0.11% at 22.00 WITA. Thus the prototype monitoring system can be implemented in the Electrical Installation Laboratory, Metal Industry Polytechnic of Morowali.