Do you have a gassing transformer?

- The Real Cause:
InsOil Canada Ltd. has developed a new laboratory technique to determine the real cause of this deficiency.
Three innovative methods approved by ASTM International ( click here ) are designed to determine whether the fault gases are generated by:
- the inability of oil to resist decompositions under the impact of thermal and electrical stress
- the drop of oilís initial stability under electrical discharges due to the gradual accumulation of oil-born decay products,
- an incipient electrical failure such as a hot spot or partial discharges.

According to our findings, these test methods can establish a quantitative relationship between the more accurate measurement of oilís analytical properties and the performance of liquid insulation in real life conditions.
As you have seen in my previous Press Release, the measurement of the soluble and insoluble decay products in accordance to D6802 and D6181, can precisely determine the extent of oilís deterioration. In addition, testing the stability of oil under electrical discharges in accordance to D6180, a link can be identified between the actual purity of oil and the level of fault gases assessed by Dissolved Gas Analysis (DGA).

- A Solution:
An economically viable solution able to reduce the increased level of fault gases is the removal of dissolved oxygen from free breathing power transformers.

When InsOilís Dissolved Oxygen Removal System (Patent Pending) was installed on an Alberta 40 MVA transmission transformer, the decrease of dissolved oxygen also diminished the level of fault gases determined by periodic Dissolved Gas Analysis ( read more on P-Talk pg.2 ).
Should you be interested in enhancing the service reliability of an aging transformer by improving the properties of liquid insulation, please send Benchmark Analytical oil samples for analysis and to InsOil Canada Ltd. the last DGA report for technical support.