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Title: :  Automatic Phase Selection System for Uninterrupted Power Supply
PaperId: :  28260
Published in:   International Journal Of Advance Research And Innovative Ideas In Education
Publisher:   IJARIIE
e-ISSN:   2395-4396
Volume/Issue:    Volume 12 Issue 2 2026
DUI:    16.0415/IJARIIE-28260
Licence: :   IJARIIE is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.

Author NameAuthor Institute
K. Govinda RajuR.V.R&J.C College of Engineering
Kalakodimi Markandeya HarshavardhanR.V.R&J.C College of Engineering
Kasukurthi sowmyaR.V.R&J.C College of Engineering
Ravikumar Janga R.V.R&J.C College of Engineering

Abstract

Electrical and Electronics Engineering
Automatic Phase Selection, Three-Phase System, Microcontroller, Relay Switching, Voltage Monitoring
This project presents an intelligent automatic phase selection system designed to ensure uninterrupted single-phase power supply from a three-phase system. In many residential, commercial, and industrial applications, phase failure is a common issue that leads to power interruptions and affects the performance of electrical appliances. Traditional manual phase changeover methods are inefficient, time-consuming, and require human intervention. To overcome these limitations, this system introduces an automated solution using a microcontroller-based control mechanism. The system continuously monitors the voltage of all three phases (R, Y, and B) using voltage sensing circuits. An ATMega328 microcontroller analyzes real-time voltage data and determines the health and stability of each phase. Based on intelligent decision logic, the system automatically selects the healthiest available phase. A relay driver circuit (ULN2003) is used to control electromechanical relays, which switch the load to the selected phase without delay. Additionally, the system includes mobile-based monitoring, where switching events and phase conditions are logged and transmitted for real-time observation. This enhances system reliability, safety, and user convenience. The proposed system eliminates manual intervention, reduces downtime, and provides a cost-effective and efficient power management solution. It is suitable for applications in homes, offices, and small industries where continuous power supply is essential.

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IJARIIE K. Govinda Raju, Kalakodimi Markandeya Harshavardhan, Kasukurthi sowmya, and Ravikumar Janga . "Automatic Phase Selection System for Uninterrupted Power Supply" International Journal Of Advance Research And Innovative Ideas In Education Volume 12 Issue 2 2026 Page 1123-1128
MLA K. Govinda Raju, Kalakodimi Markandeya Harshavardhan, Kasukurthi sowmya, and Ravikumar Janga . "Automatic Phase Selection System for Uninterrupted Power Supply." International Journal Of Advance Research And Innovative Ideas In Education 12.2(2026) : 1123-1128.
APA K. Govinda Raju, Kalakodimi Markandeya Harshavardhan, Kasukurthi sowmya, & Ravikumar Janga . (2026). Automatic Phase Selection System for Uninterrupted Power Supply. International Journal Of Advance Research And Innovative Ideas In Education, 12(2), 1123-1128.
Chicago K. Govinda Raju, Kalakodimi Markandeya Harshavardhan, Kasukurthi sowmya, and Ravikumar Janga . "Automatic Phase Selection System for Uninterrupted Power Supply." International Journal Of Advance Research And Innovative Ideas In Education 12, no. 2 (2026) : 1123-1128.
Oxford K. Govinda Raju, Kalakodimi Markandeya Harshavardhan, Kasukurthi sowmya, and Ravikumar Janga . 'Automatic Phase Selection System for Uninterrupted Power Supply', International Journal Of Advance Research And Innovative Ideas In Education, vol. 12, no. 2, 2026, p. 1123-1128. Available from IJARIIE, http://ijariie.com/AdminUploadPdf/Automatic_Phase_Selection_System_for_Uninterrupted_Power_Supply_ijariie28260.pdf (Accessed : ).
Harvard K. Govinda Raju, Kalakodimi Markandeya Harshavardhan, Kasukurthi sowmya, and Ravikumar Janga . (2026) 'Automatic Phase Selection System for Uninterrupted Power Supply', International Journal Of Advance Research And Innovative Ideas In Education, 12(2), pp. 1123-1128IJARIIE [Online]. Available at: http://ijariie.com/AdminUploadPdf/Automatic_Phase_Selection_System_for_Uninterrupted_Power_Supply_ijariie28260.pdf (Accessed : )
IEEE K. Govinda Raju, Kalakodimi Markandeya Harshavardhan, Kasukurthi sowmya, and Ravikumar Janga , "Automatic Phase Selection System for Uninterrupted Power Supply," International Journal Of Advance Research And Innovative Ideas In Education, vol. 12, no. 2, pp. 1123-1128, Mar-App 2026. [Online]. Available: http://ijariie.com/AdminUploadPdf/Automatic_Phase_Selection_System_for_Uninterrupted_Power_Supply_ijariie28260.pdf [Accessed : ].
Turabian K. Govinda Raju, Kalakodimi Markandeya Harshavardhan, Kasukurthi sowmya, and Ravikumar Janga . "Automatic Phase Selection System for Uninterrupted Power Supply." International Journal Of Advance Research And Innovative Ideas In Education [Online]. volume 12 number 2 ().
Vancouver K. Govinda Raju, Kalakodimi Markandeya Harshavardhan, Kasukurthi sowmya, and Ravikumar Janga . Automatic Phase Selection System for Uninterrupted Power Supply. International Journal Of Advance Research And Innovative Ideas In Education [Internet]. 2026 [Cited : ]; 12(2) : 1123-1128. Available from: http://ijariie.com/AdminUploadPdf/Automatic_Phase_Selection_System_for_Uninterrupted_Power_Supply_ijariie28260.pdf
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