earticle

한국어

This study analyzes the causes of electric shock accidents that occurred in Republic of Korea and emphasizes the importance of electrical safety devices, particularly focusing on the roles of grounding and earth leakage circuit breakers(ELBs). Through a review of actual accident cases, it was found that the absence or failure of ELBs, along with inadequate electrical installations in residential and construction environments, were major contributing factors to electric shock incidents. In response, a visualization device was developed to evaluate and visually display the operating characteristics of molded case circuit breakers(MCCBs) and ELBs under simulated real-world conditions. The experimental results showed that MCCBs effectively interrupt the circuit under overload conditions, while ELBs promptly cut off the current when a leakage current is detected. The developed testing device also enabled real-time measurement and visualization of voltage and current, allowing clear verification of breaker operations. This study emphasizes the necessity of systematic design and installation of electrical safety systems to prevent electric shock accidents and suggests its potential utility in safety policy development and educational applications.