Saturday, November 21, 2009

Transformer Oil Interfacial Tension Test

I previously discussed transformer oil analysis through DGA .
Here, I'd like to discuss another test at the disposal of analyzing the condition of a transformer insulation system - the Interfacial Tension Test (IFT).
As transformer oil degrades via oxidation, it cannot efficiently perform its insulation, cooling and protection of the core functions. Oxydation can occur via a myriad of reasons - oxygen derived from air, degrading paper insulation, water entering the oil via leaks, and also heat, electrical stress and many other factors.
One way to detect oil degradation is through its change in acidity (neutral number - NN) and through its IFT.
Acidity is manifested by a visible change of color in the oil - the oil turns markedly darker. These acids, combined with water content will degrade the paper insulation and cause rusting.
Another manifestation is the reduction of the IFT of the oil. IFT is a powerful tool that helps determine the condition of the insulation oil. It is highly correlated to the NN as shown in the figure at left. It is an empirical graph showing the strong dependency between the neutral number and the IFT.
Among Megwatt Transformers services, we offer comprehensive tests of transformers. Our analytics lab offers transformer oil testing and among them, we provide DGA, IFT, Acidity and water content.
Contact us for more information.
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10 comments:

  1. Tahira KhalidJuly 15, 2010 at 6:06 PM

    Hi,
    I really appreciate you for all the valuable information that you are providing us through your blog. Keep Sharing

    ReplyDelete
  2. Current TransformersAugust 14, 2010 at 1:06 PM

    Hi sir
    It is an awesome blog,and really this invention will add a value in our current situation of the power.

    ReplyDelete
  3. myunOctober 11, 2010 at 4:12 AM

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  4. plumbingJuly 2, 2011 at 8:38 AM

    This is a very valuable information for power consumers. Well, Physics must be involved into this kind of calculations.

    ReplyDelete
  5. Insulation oil testerJuly 6, 2012 at 5:41 PM

    I recently read another article on paper degrading and identify through oil testing. This is one of the better explanations I have seen.

    ReplyDelete
  6. UnknownNovember 24, 2012 at 10:57 AM

    Sir ,
    This is very important information for consumer, Keep sharing Thanks High Voltage Testing Set

    ReplyDelete
  7. UnknownMay 3, 2013 at 3:48 PM

    Thanks for sharing this information.This blog is very learning blog.Please visit also my site...electrical transformers

    ReplyDelete
  8. MiracleJuly 12, 2016 at 3:09 PM

    Any increase in moisture content can reduce the insulating properties of the oil, which may result in dielectric breakdown. So one needs to take care of this aspect during maintenance.
    Transformer manufacturer in India | Wire harness manufacturer in India

    ReplyDelete
  9. princeSeptember 25, 2018 at 2:41 PM

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    ReplyDelete
  10. S.B.ELECTROTECH - Electrical and Electronic testing & measuring instrumentsDecember 9, 2022 at 11:51 AM

    Thanks for sharing such information on Transformer Oil Interfacial Tension Test. I like the way that you mentioned complete specification about it. Contact us, we are leading Transformer Test Bench suppliers in India.

    ReplyDelete

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