One of the most important safety features of relays is their ability to detect overcurrent conditions. An overcurrent relay monitors the current flowing through a circuit and disconnects the circuit if the current exceeds a pre-set value. This is crucial for preventing damage to electrical components, such as wiring, motors, and transformers, which can be severely damaged by excessive current. Overcurrent protection relays come in two primary types： instantaneous and time-delay. Instantaneous relays trip immediately when an overcurrent is detected, while time-delay relays allow for a brief delay before tripping, providing protection against short-lived current surges.