Sweep Frequency Response Analysis (SFRA) is a powerful and sensitive method to evaluate the mechanical integrity& electrical condition of core, windings and clamping structures within power transformers by measuring their electrical transfer functions over a wide frequency range.

SFRA analysis can detect incipient fault in transformers like:

• winding deformation – axial & radial, like hoop buckling, tilting, spiraling

• displacements between high and low voltage windings

• partial winding collapse

• shorted or open turns

• faulty grounding of core or screens

• core movement & shorting of lamination

• broken clamping structures