Overload relays are an essential component in electrical systems, designed to protect motors and other electrical devices from damage due to excessive current. These devices act as safety mechanisms, ensuring that electrical systems operate within safe limits and preventing costly repairs or failures caused by overheating or overcurrent. In this article, we will explore the concept of overload relays, their functions, types, and their importance in ensuring the longevity and efficiency of electrical equipment.
What is an Overload Relay? An overload relay is a protective device used in electrical circuits, specifically to protect motors from overcurrent situations. When an electric motor is subjected to a current that exceeds its rated capacity for an extended period, the motor could overheat and suffer damage. The overload relay works by sensing the current passing through the motor’s circuit and cutting off the power supply if the current reaches unsafe levels, typically caused by conditions such as mechanical failure or abnormal operating conditions. The Working Principle of Overload Relays
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