The TR-MARK III R 250V is the successor of the famous TR-MARK III R. Besides an extended test voltage up to 250V, it offers new features and increased accuracy to make it a perfect system. A color LCD with back lighting and touch screen increases handling and user comfort. Two USB interfaces make it easy to store measurements on external storage devices and transfer easily to a personal computer or download nameplate data of xformer to test.



The TR-MARK III R 250V is the same instrument as the TR-MARK III 250V but built in a 19” rack housing. Therefore, it can be used very well in test labs or be assembled into complete measurement systems.


  • Color LCD with backlighting and touch screen
  • Automatic measurements of Voltage/Turns Ratio, Current and Phase displacement
  • Internal storage for  more than 10’000 complete test results
  • Simple touch screen operation
  • Easy one time hook up to the transformer
  • Graphical tap changer display
  • Tap changer interface (In- and Output)
  • Load on test object <0.05 VA
  • Measures Power transformers, PT’s and CT’s
  • Displays % error vs. name plate value
  • Automatic phase vector detection
  • Enhanced heavy-duty protection circuitry
  • Extremely rugged (can withstand a drop test of 1 meter)
  • Data exchange via USB-Key
  • Internal Printer
  • Displays deviation from a nominal ratio
  • Automatic test voltage range
  • 2 Years standard warranty