A rugged, lightweight instrument that automatically measures Turns Ratio, Voltage Ratio, Excitation Current, Phase Relationship, and Phase Displacement, the Raytech TR-Spy Mark II is a fully automatic instrument that can perform precision laboratory measurements, as well as function extremely well in the field for routine maintenance testing.

Raytech TR-SPY Mark II Three Phase TTR (Transformer Turns Ratio) features:

• Automatic Three Phase TTR 
• Select transformer type using simple user interface 
• Measure voltage/turns ratio, current and phase displacement 
• Store 100 test results on unit or export using RS-232 interface 
• Ratio Measurement of .08 to 13000 turns 
• Five test voltage ranges – 1V, 10V, 40V, 100V and Automatic 
• Automatic phase vector detection