Winding Failures: Overloading, short circuits, or insulation breakdown can damage the windings, leading to reduced efficiency and potential fire hazards.
Core Damage: Excessive heat, mechanical stress, or poor manufacturing can compromise the core's integrity, affecting the transformer's performance.
Oil Contamination: Impurities in the transformer oil can degrade insulation and accelerate aging.
Bushings and Terminals: These components can deteriorate due to aging, exposure to the elements, or mechanical stress.