understanding overload relay： protection for electrical equipment
Release time:2025-09-14 20:01:05
Overload relays are vital components in the protection of electrical circuits, particularly in industrial applications where motors and other equipment are used. Their primary role is to safeguard devices from damage caused by excessive current, which could lead to overheating, burnout, or even permanent failure. In this article, we will delve into the function, types, and applications of overload relays, as well as their importance in maintaining the safety and longevity of electrical systems.
What is an Overload Relay?
An overload relay is an electrical protective device designed to monitor the current flowing through an electrical circuit, typically associated with electric motors. Its purpose is to detect overcurrent conditions, which may occur due to mechanical failure, system malfunctions, or excessive load on a motor. Once the relay detects an abnormal current flow—indicating that the motor is operating under a condition that could cause overheating—it will disconnect the power supply, preventing damage to the motor and other connected equipment.
Function of an Overload Relay
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