Control System Of Current Flow 3-Phase Unbalanced Based On Arduino Uno

Bambang Suprianto, Lucky Aggazi Subagyo

This unbalanced current 3 phase load is a disturbance that can cause damage to the power transformer. The load on each phase difference may result in a decrease in the power quality of the power system (e.g., IEEE and NEMA). Load unbalance on the power traformator causes losses, excess heat on one phase, reduced lifetime and efficiency on the power traformator. This research aims to design and make a prototype monitoring unbalanced 3 phase currents. Arduino microcontroller as the main controller function to read the current value will be displayed on the LCD (Liquid Crystal Display), activates the buzzer and LEDs as an indicator when there is an unbalanced in the current flow  of a predefined value. The experimental results show that the prototype tool when compared to the ampere meter measuring devices can respond to the 3 phase unbalanced with an average error or accuracy of current per phase R = 3.92%, S = 3.44%, and T = the remaining 3.11%.