Leakage current relay (LCR) is an essential component in electrical systems designed to enhance safety by detecting and responding to leakage currents. These currents, though typically small, can pose significant risks to both electrical equipment and human safety if left unchecked. A leakage current relay is designed to protect electrical devices from damage, reduce fire risks, and prevent potential electrical shocks. In this article, we will explore the workings, applications, and advantages of leakage current relays, shedding light on their importance in maintaining safe and efficient electrical systems.
What is a Leakage Current Relay? A Leakage Current Relay (LCR) is a protective relay used to detect leakage currents in an electrical system. Leakage currents are the small electrical currents that flow through unintended paths, often due to degraded insulation or faults in the electrical system. LCRs are designed to monitor these currents and trigger protective actions, such as turning off the power supply, when the current exceeds a predefined threshold. By doing so, these relays help in preventing electrical hazards like fires, equipment damage, and even electric shock to humans. Working Principle of a Leakage Current Relay