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DTR-8500 Portable Digital Transformer Ratiometer

Supplier: OBIAT Electronics Pty Ltd

The DTR-8500 is a portable digital transformer ratiometer designed for on-site testing of power, potential and current transformers.

Price Guide: POA

When connected to a non-energized transformer, the DTR-8500 accurately measures primary to secondary turns ratio, while simultaneously displaying polarity and excitation current.

Rugged and reliable, the DTR-8500 is built into an attractive, sealed structural polypropylene case designed to withstand the rigors of industrial and utility field use.


  • Designed for power transformers, VTs, PTs and CTs.
  • Direct readings from 0.8000:1 to 1500.0:1.
  • Display turns ratio, polarity and excitation current simultaneously.
  • Dual power supply and operation: integrated rechargeable NiCD battery and AC supply.
  • Display warnings of incorrect lead connections, reverse polarity, open and short circuits.
  • Easy connection and test setup: no calibration or balancing required.
  • Large dual line display with adjustable contrast and backlight ensures clear day/night visibility.
  • Low battery indicator.
  • Includes 15ft leads.


  • Power transformers.
  • Potential transformers.
  • Current transformers.

Model DTR-8500 Datasheet PDF (511kb)

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