Acoustic activities in equipment such as power transformers and reactors are generally caused by mechanical, thermal or electrical phenomena. Its most common causes are: mechanical vibrations of components and accessories; switching impulses; oscillations of the electrical system; hot spots and partial discharges. Regardless of their nature, these causes may result in degradation of the insulation and lead to equipment failure.
It allows to perform tests with the equipment in operation, the detection and analysis of defects in real time, has relative immunity to electromagnetic noise and can allow the three-dimensional location of defects.
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