BE1-40Q, Loss of Excitation Relay

These relays provide protection for synchronous generators from extensive damage by detecting loss-of-field excitation.


  • Accurate protection provided by true var measurement.
  • Minimized CT and PT costs as a result of low sensing burden.
  • Reduced battery load with low burden power supply.
  • Accurate, repeatable, and reliable operation.
  • Simple HMI provides clear and intuitive settings for easy configuration.
  • LED targets provide clear annunciation of status.
  • Easily perform in-case system and device tests using test paddles.


Technical Resources


Case Studies