Line Sentinel,  

Broken overhead power lines can cause significant damage to equipment, people and surroundings. Recloser systems intending to quickly restore power can extend the damage during these events. The Line Sentinel is a patented system solution to detect open power line conductors. Upon detection, the system communicates to existing recloser controllers to disconnect the power source and block reclose. The system is designed to disconnect the power source before the line touches the ground.


  • Pre-fault detection.
    - Designed to detect broken power line and disconnect power source.
    - Broken conductors can reach beyond right-of-way.
    - End of line to disconnect in less than 1.25 seconds.
  • End-of-Line Detection: Cover the entire network.
  • Controlled via a proven and established BE1-11 protective relay.
    - Proven algorithms based on more than 50 years of relaying experience and more than 30 years of reliable digital relaying design.
  • Deploy quickly.
    - No current transformers.
    - Self-Powered with 10 hour outage ride through rechargeable battery.
  • Easily expandable.
    - Implement as full system or add to or revise configuration over time.
    - Prioritize high risk locations.
  • Integrates into existing distribution control schemes.
    - Contact I/O to Recloser Controller or Breakers.
    - Implement only where desired.
  • Patented Negative Sequence based methodology.
    - Beyond Protection. Detect the absence of a healthy system.
  • Industry standard 900 Mhz radio communications.
    - Proven technology.
    - No Licensing required.
  • System wide event recording via Measurement Module.
    - Over 1,000 record Sequence of Event log.
    - Records trip initiate location.
  • System Alarms: Choose to trip or alarm.
  • BESTCOMSPlus® software, provided free of charge<.br> - Easy to edit protection settings with confidence with its intuitive settings, built-in error checking, and summary screens.
  • Pre-programmed logic and protection settings.
    - Easy to edit (if desired) and understand with preprogrammed schemes, drag-and-drop logic, user labels, and notes provided by BESTlogic™Plus.
    - Offline Simulator in BESTlogic™Plus helps test and troubleshoot logic without expensive hardware.
  • Rugged NEMA 3R Enclosure: Confidently install for harsh weather.
  • Designed, Manufactured and Supported in the USA.



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