Three Phase Fault Analysis Using Thermal-Magnetic Circuit Breaker and Overcurrent Relay

Due to the modernization of the power system, automatic monitoring, control, and protection are observed from electricity generation via transmission to the consumer end. Sometimes an unwanted fault occurs in power transmission lines, which breaks the uninterrupted electricity flow. Hence, a huge amount of power loss happens. This paper presents an in-depth study of three-phase failures in electrical power systems employing an overcurrent relay and a magnetic breaker. One of the most dangerous disruptions that can affect electricity systems is a three-phase failure, which can seriously harm machinery and endanger people's safety. The overcurrent relay and magnetic breaker are two common safeguards for spotting and isolating faults. With the combination of a thermal-magnetic circuit breaker and an overcurrent relay system, this research investigates three-phase fault automatic detection and protection. And examines how the magnetic breaker and overcurrent relay identify and stop faults, noting their benefits and drawbacks. The investigation offers important insights into the efficient use of magnetic breakers and overcurrent relays for improved fault detection and protection in electrical power systems.