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Raytech TR-SPY: Three Phase Transformer Turns Ratio Meter


The Raytech Turns Ratio Spy (TR-Spy) Meter was developed for high degree of accuracy for the research and development of transformers. This technology is packaged into a portable test system for use by transformer manufacturers, rebuild shops, and electrical maintenance crews. This first system has become the most widely respected precision instrument for the ease of use, design, and operation, and was developed with the assistance of transformer manufacturer’s and utility test crews.

SKU: raytech-tr-spy Categories: ,

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The Raytech TR-SPY Three Phase Meter automatically measures Turns Ratio, Voltage Ratio, Excitation Current and Vector Phase of transformers

All connections of the various transformer configurations are accomplished internally. This system is very easy to use and operate on all configurations of single and three phase transformers.

This is a fully automatic, rugged and portable instrument that provides very precise and repeatable measurements.

  • Automatic measurements of Voltage / Turns Ratio, Current, and Phase displacement.
  • Single push button operation.
  • Single hook up to the transformer .
  • Automatic test voltage range.
  • Displays deviation from a nominal ratio.
  • Graphical tap changer display.
  • 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.

Additional information


UOM - Unit of Measure


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