Abstract
In this paper, the safety diagnosis using thermal image analysis is described for power equipments. The conventional three-phase comparison method has only provided the results of thermal comparison for the equipments. The proposed method defines the conditions of poor connection by visual checks, and supports the criteria with each thermal rise step. As a result, the thermal difference from to meant the warning state. In addition, the thermal difference more than meant that the connection status was unbalanced. In this case, the countermeasure might be the internal load distribution. If the thermal difference more than is observed, it means a hot spot at the poor connection. If the hot spot is observed all over the surface, its cause was the unbalanced load, which made the conductive parts discolored and raised the possibility of oxidization or generation. This diagnostic technology employing thermal image analysis method can be directly applied in the field and ensures the safety of equipments.
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