SEL-487B

The SEL-487B provides optimized low-impedance bus differential fault detection using high-speed sub-cycle protection combined with high-security operation for externally generated faults. Superior protection performance is combined with integrated power plant automation features for seamless transition to new and upgrade applications.

Transform the way you modernize your substation with optional Time Domain Link (TiDL) technology or Sampled Value (SV)-based technology using IEC 61850-9-2.