ABB, a global leader in electrification technology, recently introduced the new RED521 1MRK002003-BA differential protection terminal. This innovative product, with its unique measurement principle and low CT requirements, provides fast and selective phase separation protection for busbars, generators, autotransformers, etc., in power systems.

The RED521 1MRK002003-BA differential protection terminal uses advanced digital technology, with fast and stable characteristics, the operation time is usually 10-15ms, regardless of the number of connected feeders, can maintain complete stability against external failures, even in severe CT saturation conditions can be stable operation. In addition, the CT requirements of this terminal are very low, allowing the CT circuit to be shared with other relays, effectively saving costs.

The compact design of ABB RED521 1MRK002003-BA terminals allows up to 18 current transformers to be connected directly to the terminals, simplifying engineering configuration and reducing the need for auxiliary CT. The CT ratio, as the primary value of the pre-HMI input, greatly reduces the commissioning and installation time. This easy-to-use design philosophy makes RED521 1MRK002003-BA ideal for retrofits and new installations.

RED670

Concluding remarks:
ABB REL’s RED521 1MRK002003-BA differential protection terminals further enrich ABB’s product line in the field of power system protection. Its fast response, stability and ease of use provide a strong guarantee for the safe operation of the power system.

Citation information:

The introduction of ABB RED521 1MRK002003-BA differential protection terminals represents ABB’s continued innovation and leadership in the field of power system protection, providing users with efficient and reliable protection solutions.