Transformer Maintenance Knowledge Vault

Sampling - Part 1

Oil testing can diagnose unseen problems inside a transformer. Mineral oil comes in contact with the internal workings of the transformer and contains valuable information regarding the condition of the transformer. Information about the equipment and a properly drawn sample are critical for making a correct diagnosis of the transformer's health.

7 Challenges to Overcome in Developing Electrical System Reliability

There are very few organizations that are not concerned with following reliability best practices. It is more efficient and less expensive to prevent a breakdown than it is to fix something that breaks. Monitoring and data management are becoming ubiquitous in the industrial world, the utility world, and across most industries and sectors as we work towards a more reliable and interconnected future. Electric power systems have not been included in this shift away from break/fix and towards data-centric reliability, and what the future holds for organizations seeking best practices.

Moisture in Transformers - Part 2

Moisture may exist in a transformer in several forms. 1. Water vapor in the gas space of the transformer. 2. Water dissolved in the oil. 3. Free water suspended as droplets in the oil. 4. Emulsified water contained in the decay products of oil oxidation. 5. Water absorbed into and adsorbed onto the solid insulation. 6. Free water that has settled to the bottom of the transformer. Paper has more affinity for moisture than oil does. Once wet, moisture removal is the corrective action that should follow. However, before moisture removal, it is important to first evaluate how the transformer became wet.

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Sampling - Part 1

7 Challenges to Overcome in Developing Electrical System Reliability

Moisture in Transformers - Part 2

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