Protection Relay REJ603BB401NN31E ABB for Industrial Automation

Description

TheABB REJ603BB401NN31E Protection Relayis a self-powered feeder protection relay, part of ABB’sRelion® 600 series. This relay is specifically engineered forsecondary distribution networks, where reliable fault protection is critical. It is powered directly from the current transformers (CTs) connected to the feeder, eliminating the need for an external auxiliary power supply, making it perfect for installations with limited or unavailable auxiliary voltage sources. TheREJ603offers selectiveshort-circuitandearth-faultprotection, ensuring quick fault detection and tripping to safeguard both equipment and personnel. Itscompact designandease of installationmake it well-suited for use inring main units (RMUs),compact substations, anddistribution automationprojects.