Diagnosis

For diagnosis of “SF6 in oil – Bushing seal defects”, Sea Marconi uses its own diagnostic metrics, namely:

visual signs on the bushing are interpreted;

through analysis of the oil, the symptoms– that is, the symptomatic indicators (SF6 in oil, dissolved gases, dissolved water) and their characteristic values – are identified;

the database is used to study family or subjective case histories (in the search, for example, for defects/failures in twin machines);

factors of uncertainty, speed and evolution over time (trends) of symptomatic indicators are taken into consideration and monitored during the life cycle phases;

on the basis of assessment of these key factors, the specific criticality is classified according to type and priority, and type and priority of corrective actions are identified at the same time.