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Raytech T-Rex Three Phase Voltage Extension to Turns Ratio Meter




T Rex

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The Raytech T-Rex Three Phase Voltage Extension to Turns Ratio Meter was designed to give Engineers and Test Technicians the ability to test the phase relationships and actual voltage ratios of transformer windings while applying three phase voltage.


The system (in connection with a 3 phase Raytech Turns Ratiometer) precisely measures the ratio and angular relationship of transformer phases with voltage applied to all three phases simultaneously. This is a “real condition” measurement, which allows greater understanding of how the transformer will operate connected to a 3 phase system.


The Raytech T-Rex is especially useful for transformers with:

  • Phase relationships other than multiples of 30°
  • Zig Zag windings 
  • Uncentered neutral points 
  • Suspected broken, damaged, or missing core laminations