Sweep frequency response analysis is the process of measuring the mechanical integrity and electrical transfer function in power transformers. Sweep frequency response analyzers help provide information and detect damage or wear on the transformer, including any of the following: winding deformation, displacements between high and low voltage windings, partial winding collapse, shorted or open turns, faulty grounding of core or screens, core movement, broken clamping structures, problematic internal connections. Sweep frequency response analyzers measure the current capacitance of the transformer and the measurements are used to compare to the initial test at install. Any change in the condition of the insulation, winding or other components results in change of capacitance or inductance, indicating an issue.