A Time Delay Relay is an electromechanical or electronic device that controls the operation of an electrical circuit by introducing a time delay after receiving a trigger signal. When the input signal is applied, the relay does not immediately respond; instead, it waits for the preset delay time before either activating or deactivating the connected load. This time delay can range from milliseconds to several hours, depending on the requirements of the application.

    Time Delay Relays are typically used to manage the sequence of operations in complex systems where timing and coordination are critical. They help in protecting equipment from sudden electrical shocks, ensuring that systems operate smoothly, and preventing failures due to improper timing or excessive load.