Jim Mack Engineering  Description of Service

Distribution Feeder Protection Evaluation

Most distribution feeders have not had their relay settings reevaluated for decades.   Many Utilities set all feeder relays the same for simplicity.   Relays have been upgraded to microprocessor and settings were merely transferred over from the electromechanical, not taking advantage of the additional power of the new relay.

My feeder review program takes your feeder maps, operational experience, and problem history into account together with my experience to recommend what additional protection can be utilized including but not limited to:

  1.  Identify if feeder is a candidate for adaptive settings.

  2.  Identify if feeder is a candidate for negative sequence elements.

  3.  Identify if feeder is a candidate for impedance based elements or voltage supervised elements.

  4.  Identify if feeder is a candidate for advanced reclosing settings.

  5.  Suggest settings to alarm for a downed conductor.

  6.  Fix any history of operational problems with settings adjustments and additional elements.