Overload relay is an electrical protection device that detects whether the current in a circuit exceeds the rated value and automatically cuts off the circuit when an overload occurs. In this way, overheating and burning of equipment or circuits can be avoided, and the safe and stable operation of equipment and circuits can be ensured.

With the continuous improvement of modern industrial automation, the scope of using electrical equipment is becoming more and more extensive. Overloading is a common problem that can arise from the electrical system itself, the environment in which the equipment is operated, or operator error. If there is no timely protection, overload will cause equipment burnout and circuit failure, resulting in production losses and safety hazards.

The function of the overload relay is to detect whether the current in the circuit exceeds the rated value. Once it is found that the current exceeds the set value, it will automatically cut off the circuit to avoid damage to electrical equipment or circuits due to overload. This can ensure the safe and stable operation of equipment and circuits, and ensure the normal progress of production.