The Iris Power RFAII-S instrument employs algorithms that revolutionize the analysis of the flux data on salient pole rotors by providing diagnosis of the rotor winding condition regardless of generator load changes. This technology, when connected to the Iris Power TFProbe (total flux probe), can accurately detect and locate the presence (or absence) of turn shorts. 

Salient pole rotor winding insulation must withstand severe electrical, mechanical and environmental stresses. Insulation failures can result from many factors including:
• mechanical wear, e.g. caused by frequent start/stop cycling;
• distortion, breakage and cracking due to centrifugal mechanical loading and thermally inducedexpansion/contraction cycles;
• overheating due to overloading, over excitation or inadequate/diminished cooling;

• local overheating at high resistance joints and at the shorted areas of the winding;
• contamination from brake dust or other environmental factors that result in surface tracking between pole turns, or to ground;
• over-voltage induced from system events or from firing circuits in static exciters.