An automatic relay is an electrical device that is used to control a circuit automatically based on certain conditions. It is a type of relay that switches on or off a system or device without requiring manual intervention. This relay typically operates in response to signals from sensors, timers, or controllers in various systems, such as electrical circuits, automation systems, and machinery.

Here are some common characteristics and applications of automatic relays: Functionality: It works by detecting certain conditions like voltage, current, or temperature changes and, based on those parameters, automatically triggers an action, such as opening or closing a circuit. Applications: Automatic relays are used in many fields, including: Protection circuits: For overload or short circuit protection in electrical systems. Automation: To control machinery or processes without manual inputs, such as in industrial automation. Timing and control: In systems like motors, lighting circuits, or heating elements, where timed operations are required.