understanding overload relay： protection and function in electrical systems
Release time:2025-12-01 04:09:56
Overload relays are essential components in electrical systems, especially in motors and other machinery. They serve as protective devices that help prevent damage to equipment by disconnecting the power supply when an overload condition is detected. Understanding how overload relays work, their types, and their importance can significantly enhance the reliability and lifespan of electrical systems.
What is an Overload Relay?
An overload relay is a device used to protect electric motors and other electrical appliances from damage caused by excessive current or overheating. The primary function of an overload relay is to monitor the current flowing through the system. If the current exceeds a preset threshold for a prolonged period, the relay activates and disconnects the power, protecting the equipment from possible damage. Overload relays are designed to prevent the consequences of motor burnout, mechanical failure, and even fire hazards that may arise from prolonged overload conditions.
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