Elbow Switching Capabilities for Unloaded Cable

Identify the phenomenon or phenomena responsible for unexplained flashovers of elbow terminators, while switching unloaded or very lightly loaded distribution cables. Also, correlate these switching failures to system (e.g. cable length, circuit topology) and component (e.g. elbow and bushing insert) characteristics. Two stages of investigation are planned:

  • Failure mechanisms will be identified in laboratory re-creations of typical field operations
  • Insulation strength will be defined for varying positions and environmental conditions.

In addition, this effort will be continued in Program 6, where a switching performance test will be developed and recommended for incorporation into ANSI Standard 386.

Tagged: P1-5, P5, Equipment Testing/Evaluation, System Protection, Engineering Guidelines, Engineering Analysis Software, Economic Analysis