Implementing Online Dissolved Gas Analysis
Monitor DGA gas levels, rates, and ratios to get a complete picture of transformer or load tap changer (LTC) health.
Transformer Failure Happens More Often Than You Think!
Already in 2017, the United States has seen a number of transformer failures (explosions and fires). These include transformer fires in Castle Rock, CO (Feb 6th), Lawrence County, Ohio (Feb 9th), and Waikiki, Hawaii (Feb 12th) and numerous others!
According to our 2012 survey, about 68 % of electric utility companies manually obtain transformer oil samples to measure transformer health every six months to a year. These tests are too far apart to allow for condition-based maintenance and are, most often than not, unable to detect faults before they turn into failures.
While it would be ideal to implement instruments on the entire fleet, there are some transformers specifically in need of constant monitoring:
- Transformers with a lifetime of 30+ years of age (as transformers age, the possibility of faults and failures increases)
- Critical power transformers identified with emerging defects (wait and watch approach)
- Strategic transformers belonging to power generation units