Old-style instantaneous relay for relay protection
These relays are usually instantaneous in action, with no intentional time delay, closing as soon after pickup as the mechanical motion permits. This is the first generation oldest relaying system and they have been in use for many years. They have earned a well-deserved reputation for accuracy, dependability, and reliability. How Does Instantaneous and Time-Overcurrent Protection Work? Overcurrent protection prevents damage from the overheating of critical components and conductors, further preventing fires and injury. In electrical engineering, a protective relay is a relay device designed to trip a circuit breaker when a fault is detected.
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