Sweep Frequency Response Analysis -SFRA Test: > SFRA test is nothing but a Sweep Frequency Response analysis, which is used to find out the physical condition of transformer windings, Alternator Rotor’s windings etc. The winding of transformer or alternator rotor’s may be exposed to mechanical stresses during unsafe transportation, lightning impulse, heavy short circuit faults, … Continue reading Sweep Frequency Response Analysis -SFRA Test Procedure