html{display:none} Digital Secondary Systems | Schweitzer Engineering Laboratories
Distribution / Protection

Digital Secondary Systems

SEL digital secondary system solutions (sometimes called digital substation solutions) help protect and control substation primary equipment using digital devices in the secondary system that transmit data via fiber-optic cables. Our flexible, scalable, and economical solutions are built with rugged, field-tested hardware that can withstand harsh environments. Select from two solutions:

  • Time-Domain Link (TiDL) technology
  • SEL Sampled Values (SV) technology

TiDL Technology

TiDL is an innovative solution engineered with simplicity in mind. This technology requires no external time reference, has strong cybersecurity, and is easy to implement with no network engineering required.