About ABB REJ601BD446BB1NH RELAY

ABB REJ601BD446BB1NH RELAY

The REF601 is a dedicated feeder protection and control relay. The REJ601 is an overcurrent protection relay without breaker control. These relays are intended for the protection of utility substations and industrial power systems within primary and secondary distribution networks. They are members of ABBs Relion product family and part of its 605 series.These relays, provide an optimized composition of protection, monitoring and control functionality in one unit, with the best performance usability in its class and are based on ABBs indepth knowledge of protection and numerical technology.The REF601 and REJ601 can be pre-configured which facilitates easy and fast commissioning of switchgear. To emphasize the simplicity of using these relays, only application specific parameters need to be set within the relays intended area of application. The standard signal configuration can be altered by LHMI (local human-machine interface).The relays are available in three alternative application configurations, as indicated in Table 2

Advanced Feeder Protection

The REJ601BD446BB1NH relay delivers comprehensive feeder protection across electrical systems, guarding against overcurrent and short-circuit conditions. Its swift response time of less than 30 ms ensures rapid system isolation, minimizing potential damage and improving overall safety. Designed for both low and medium-voltage applications, this relay is ideal for utility substations and industrial power distribution.


Reliable and Durable Construction

Engineered for long-term use, this ABB relay features a rugged enclosure rated IP54 at the front and IP20 at the rear, suitable for challenging environments. The relay is capable of enduring extreme temperatures, from -40C to +70C ambient, ensuring operational stability. Its mechanical life exceeds ten million operations, while high insulation resistance and dielectric strength enhance electrical reliability.


User-friendly Operation and Integration

Equipped with an intuitive LED display and clear signaling for Trip, Start, Ready, and Alarm, the relay allows straightforward operation and detection of system status. Installation is simplified with plug-in modules and screw terminal connections, and the relay's Modbus-enabled RS-485 interface allows for easy integration with SCADA and automation systems in modern electrical networks.