Overload relay, also known as overcurrent relay, is a crucial component in electrical systems. Its primary function is to protect electrical equipment from overheating or overloading caused by excessive current flow. This mechanism helps to ensure the longevity and safety of electrical systems.

Overload relay is a sophisticated device that detects and responds to excessive current flow by interrupting the power supply to the equipment. It works by monitoring the current flow through the electrical system and triggering a trip signal when it detects an overload or abnormal flow. This trip signal can either shut down the power supply to the equipment or activate an alarm, providing a warning to the operator.

Overload relays are essential in a wide range of applications, including motors, generators, transformers, and power distribution systems. By providing an extra layer of protection, it allows the equipment to operate safely and efficiently, preventing damage and reducing downtime.

In conclusion, the overload relay is an essential component of any electrical system. Its primary function is to protect the equipment from damage caused by excessive current flow. By adding this extra layer of protection, it helps to ensure the longevity and safety of the electrical systems, allowing them to operate efficiently for years to come.