Arduino-Based Automatic Phase Shifter System

Abstract

The need for better power systems these days comes from how we\'re relying more on renewable energy in circuits, and that\'s sort of what pushed this whole project forward. An Arduino-based automatic phase shifter seems like a key way to handle changes in power phases without too much hassle. In this setup, the focus is on designing and building it, then checking how it works in real time. It might not be perfect yet, but the idea is to make power management smoother overall. I think the motivation ties back to making things efficient, especially with all the renewable stuff coming into play more. When we ran the experiments, the results looked good for boosting efficiency and keeping power stable. That stands out as a big plus for industrial uses, where reliability matters a lot. Some parts of the testing felt a bit off at first, but overall, it improved things.

Introduction

The text discusses the problem of unreliable three-phase power systems, where phase imbalance or failure can disrupt operations and damage equipment. To address this, automatic phase changers are essential, as they detect faults (like voltage drops or phase failure) and automatically switch the load to a healthy phase, ensuring continuous and reliable power supply.

The paper proposes an Arduino-based automatic phase changer, which is more precise and faster than traditional relay-based systems. It uses voltage sensing circuits, an Arduino microcontroller, and relay modules to monitor all three phases (R, Y, B) and automatically connect the load to the most stable phase. The system follows a priority sequence (R → Y → B) and ensures only one phase is active at a time to prevent short circuits.

The architecture includes step-down transformers, rectifiers, and voltage regulators to safely process input signals, while the Arduino analyzes phase conditions and controls switching. An LCD displays the active phase, and the system operates continuously to detect faults and respond quickly.

Testing shows that the system reliably detects phase failures and smoothly switches to available phases without interrupting the load. It offers advantages such as automation, reduced human error, low cost, fast response, and improved safety. It is suitable for homes, industries, hospitals, and commercial setups.

However, limitations include slight switching delays due to relays, limited capacity for high-power applications, lack of remote monitoring, and dependence on accurate voltage sensing.

Conclusion

This is a reliable, efficient and inexpensive way to continuously supply the three-phase systems with energy. It does this by continually checking for the presence of all the phases and automatically switching over the loads to the live phase, thereby bypassing the faulty phase. Arduino Nano was selected, as it\'s easier to integrate and program the accurate decision-making power and swift response. The switching is performed with the help of a relay, which will not produce a spark. The system is designed with a simple structure and low cost, thus suitable for domestic use and small-scale industries. This demonstrates the capability that reliability increases along with security.

References

[1] I. Usman, “Design and construction of an automatic phase selector for 3-phase power supply,” International Journal of Innovative Scientific & Engineering Technologies Research, vol. 12, no. 3, pp. 64–70, Jul. Sept. 2024. [2] S. ABUTU, “Automatic Phase Changer with Optimal Selection,” International Journal of Latest Technology in Engineering, Management &Applied Science (IJLTEMAS), vol. IX, Issue V, May 2020. [3] R. Patil, P. Rajput, D. Marathe, and Y. Mahajan, \"3-Phase Switching System with Relay Mechanism,\" International Research Journal of Engineering and Technology (IRJET), vol. 11, no. 11, pp. 559 562, Nov. 2024. [4] V. Tippa, A. Kedar and K. Nikum, “Automatic phase changer: A review,” Int. J. of Engineering Research & Technology (IJERT), ICIATE-2017 Conference Proceedings, vol. 5, no. 1, Special Issue, 2017. [5] P. G. Wankhade, M. P. Dongre, A. G. Vigne, S. S. Chaudhari, M. R. Chinche, K. Quazi, and S. Jalit, “Automatic phase selector with regulating power supply,” Int. J. of Research and Analytical Reviews (IJRAR), vol. 9, no. 2, pp. 369-372, May 2022. [6] C.L. WADHWA - “ELECTRICAL POWER SYSTEMS” (6th edition, New Age International Publishers) [7] D. P KOTHARI, I J NAGRATH -\"POWER SYSTEM ENGINEERING \"(2nd edition), 2007 [8] GIORGIO RIZZONI – “ELECTRICAL ENGINEERING” (7th edition, McGraw INC.), 2004 [9] M. A. Mazidi, J. G. Mazidi, and R. D. McKinlay, “The 8051 Microcontroller and Embedded Systems,” Pearson Education, 2006. [10] Simon Monk, Programming Arduino: Getting Started with Sketches, McGraw-Hill Education, 2016. [11] R. Patel and S. Desai, “Automatic Phase Selector Implementation Using Amongst Available Phase Supply,” International Journal of Progressive Research in Engineering Management and Science (IJPREMS), vol. III, no. V, pp. XX–XX, May 2023.

Copyright

Copyright © 2026 Mr. Bhanudas D. Tale, Dhanashri M. Pilare, Pushkar S. Karambe, Vishakha R. Bisane, Anurag A. Patil, Asmita V. Jamne. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.