Describe the limitations of using only Dissolved Gas Analysis (DGA) to determine the exact location of a fault within a power transformer.

While Dissolved Gas Analysis (DGA) is a valuable tool for detecting and diagnosing faults in power transformers, it has limitations in pinpointing the exact location of a fault within the transformer. DGA identifies the presence and concentration of various gases dissolved in the transformer oil, which are produced by the decomposition of oil and paper insulation due to thermal or electrical stress. Different fault types generate different gas profiles, but these profiles are not specific enough to precisely locate the fault. DGA provides a general indication of the type and severity of the fault, but it does not provide spatial information. For example, DGA can indicate overheating, but it can....