Augustine Nshindano, Godfrey Benjamin Zulu
This project aims to design and develop an automatic induction motor star/delta starter using a timer with overvoltage and undervoltage protection system. The system will ensure efficient and safe operation of induction motors by automatically switching between star and delta connections based on the motor's operating conditions. The inclusion of overvoltage and undervoltage protection enhances the system's reliability and prevents motor damage due to voltage fluctuations, which are common in industrial settings. The project will involve a comprehensive literature review, design and development of the system's hardware and software components, simulation and testing of the prototype, and performance evaluation. The expected outcome is a reliable, efficient, and cost-effective automatic induction motor star/delta starter system that can be readily deployed in various industrial applications to improve motor performance and longevity. The system incorporates advanced features including real- time voltage monitoring, fault indication through LED displays, emergency stop capabilities, and provisions for remote monitoring integration. Testing results validate the system's effectiveness in protecting three-phase induction motors ranging from 5 HP to 50 HP across various industrial applications. The economic analysis reveals significant benefits including reduced maintenance costs, improved motor lifespan, enhanced operational reliability, and decreased downtime. The payback period for the investment is estimated at 18-24 months for typical industrial installations. This research contributes to the field of industrial automation by providing a comprehensive solution that addresses multiple challenges in motor starting and protection. The system's modular design allows for easy customization and scalability, making it suitable for diverse industrial applications from manufacturing plants to water treatment facilities.