Proper Bushing Assessment for Power Transformers

Transformer bushings are one of the most critical components of a transformer. Up to 20% of major failures on high-voltage transformers can be related to bushings, with almost half resulting in catastrophic failures, such as explosions, fire, or oil spillage. It is well known in the industry that under normal circumstances, a transformer will outlast the bushings two to three times over, requiring timely bushing replacement. The key to knowing when to replace your bushings depends on the integrity and thoroughness of your routine testing or monitoring process. In this session we will present the latest in industry standards and test recommendations for bushing condition assessments to minimize the possibility of failure.