T&D World Magazine
Digital Transformer Ratiometer Gives Automatic Result Documentation

Digital Transformer Ratiometer Gives Automatic Result Documentation

AEMC's Digital Transformer Ratiometer DTR Model 8510 is a second-generation instrument incorporating the latest technology, improving on its predecessor, the Model 8500.

It offers straightforward operation, high accuracy, data storage and provides automatic test result documentation.

Features include:

  • Ratio Testing: PT/VT from 0.8000:1 to 8000:1 and CT from 0.8000 to 1000.0 (Auto-Ranging)
  • Tests performed by exciting the primary and reading the secondary; provides safer conditions for the operator on step-down transformers
  • Continuity test indicates open or loose (high resistance) terminal connections
  • DC test mode eliminates errors due to magnetic build up
  • Stores up to 10 primary/secondary nameplate voltages to use in comparing test results
  • Displays ratio, test current, winding polarity, and deviation from nameplate voltage or ratio
  • Stores up to 10,000 test results
  • DataView software included which allows configuring the instrument, downloading stored measurements and printing of test results in a report format
  • Display warns of incorrect lead connection, reverse polarity, open and short circuits
  • CE Pending - Consult Factory


  • Power transformers
  • Potential transformers
  • Current transformers
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