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The "Limit Volt" system for monitoring the regulated distance in a HV transformer.

Main functions:

  • Monitoring the regulated line voltage (under- and overvoltage)
  • Monitoring and blocking of switching commands from the voltage regulator if the voltage is outside of the permitted range
  • Return to desired tap position of the tap changer
  • Activation of the voltage regulator high-speed return
  • Display of all measured values
  • Adaption of the behavior of the device to individual needs by using adjustable parameters


  • Web-based visualization via PC/Laptop
  • Mcontrol – touch panel display 7“ & 10“ (Example configuration with several products)