Determining the faulted phase

  title={Determining the faulted phase},
  author={David Costello and Karl Zimmerman},
  journal={2010 63rd Annual Conference for Protective Relay Engineers},
In August 1999, a lightning strike caused a misoperation of a relay installed in the late 1980s. The relay misoperation caused a two-minute outage at a petrochemical plant and led to an exhaustive root-cause analysis. The misoperation can be attributed to incorrect fault type selection in a distance element-based, 1980s-era relay. Two separate events in… CONTINUE READING