December 2016 29
Why Perform Fault Gas Analysis?
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Why Perform Fault Gas Analysis? Fault Gas Analysis determines the percentage of combustible gasses present in the nitrogen cap of sealed, pressurized oil-filled transformers. This can provide information as to the likelihood of incipient faults…

December 2016 22
When to Conduct Metals-in-Oil Analysis?
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When should Metals-in-oil analysis be conducted? Metals-in-oil analysis should be conducted in large power transformers to determine quantity and type of metals present in the oil. This test can indicate problems with pump bearing wear,…

December 2016 15
Why is Dissolved Gas in Oil Analysis Important?
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Why is Dissolved Gas in Oil Analysis Important? Dissolved Gas in Oil Analysis is a refinement of the Fault Gas Analysis. Dissolved gasses are extracted from an oil sample and analyzed. Different types of faults…

November 2016 29
Importance of Performing Routine Tests on Insulating Oil
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Importance of Performing Routine Tests on Insulating Oil It’s imperative to perform routine tests on insulating oil for the following reasons: Dielectric breakdown – measures the ability of the fluid to withstand electrical stress without…

November 2016 21
Infrared Scanning: Done Without Interruption to Power
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Infrared Scanning Infrared scanning can be done without any interruption to power. It’s fast, safe, and affordable. What we can scan in one day would take hundreds of man-hours to accomplish by conventional means. Scheduled…

November 2016 11
Excitation Current Test: An Important Transformer Test
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Excitation Current Test: Another Important Transformer Test Excitation current tests are used to detect: Shorted turn-to-turn insulation, Short circuited core laminations, Loosening of the core clamping, or Improper winding connections. A typical excitation current test…

November 2016 03
Purpose of Conducting Transformer Diagnostic Tests
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Conducting Transformer Diagnostic Tests Diagnostic tests are conducted on transformers to confirm the transformer’s ability to continue functioning properly and to reduce the chance of failure. Transformer diagnostic tests include: Turns-ratio tests are used to…

October 2016 27
Purpose of Conducting Transform Insulation Tests
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Conducting Transformer Insulation Tests Insulation tests are conducted on transformers to confirm the transformer’s ability to continue functioning properly and to reduce the chance of failure. Transformer insulation tests include: Power-Factor Tests (or Dissipation-factor) are…