A Current Overload Relay (COR) is an essential component in electrical systems, designed to protect motors and other equipment from damage caused by excessive current. It acts as a safeguard, ensuring that electrical circuits and machinery function within their designated parameters. This article will explore the significance, working principle, and various applications of Current Overload Relays.
What is a Current Overload Relay? A Current Overload Relay is a protective device used to prevent electrical circuits, particularly those involving motors, from drawing excessive current that could lead to overheating and potential damage. It monitors the current flowing through a circuit and triggers an automatic shutdown or disconnection if the current exceeds the preset limit for a specified duration. This protection helps to avoid costly repairs, downtime, or even the complete failure of the motor. How Does a Current Overload Relay Work? The primary function of a COR is to monitor the current flow in a circuit. The relay is typically connected to the motor or another critical load. It continuously measures the current and compares it with a pre-set value. When the current exceeds this threshold, usually due to conditions like motor failure, excessive load, or system malfunction, the overload relay trips, disconnecting the power supply.
Leave a Reply