ABB REL series has added a new member in the field of power system protection, the new REX521GHHPSH51G feeder protection relay with its advanced protection functions and monitoring capabilities, providing a strong guarantee for the safe and stable operation of medium voltage power systems.

The REX521GHHPSH51G feeder protection relay is an important member of ABB’s line of intelligent terminals from basic protection relays to integrated power system protection, measurement and monitoring functions. This relay not only has excellent protection function to meet the needs of power system protection, measurement, monitoring and control, but also adds a series of advanced functions, such as a large number of monitoring functions such as power quality monitoring, especially adding protection functions such as acceleration before and after reclosing, and provides a full Chinese man-machine interface display, making debugging and operation very convenient.

REX521GHHGSH05G

The relay is typically used in neutral ungrounded system, resonant grounding system, neutral direct grounding system and resistance grounding system, which can meet the protection functions of quick break, overcurrent and zero grounding sequence between incoming and outgoing lines. In addition, the powerful protection function of REX521GHHPSH51G makes it suitable for large and medium voltage motor protection units.

Concluding remarks:
ABB REL series of new REX521GHHPSH51G feeder protection relays further enrich ABB’s product line in power system protection. Its comprehensive protection features, high reliability and powerful data processing capabilities provide a strong guarantee for the safe and stable operation of the global power system.