Improvement of Used Transformer Oils with Activated Bentonite
Loai Nasrat, Mohamed Abdelwahab, Gamal Ismail
DOI: 10.4236/eng.2011.36070   PDF   HTML     9,358 Downloads   16,334 Views   Citations


This research presents the evaluation of activated Bentonite material for treatment of used transformer oil. Different properties such as; electrical, physical, chemical and thermal of used transformer oil were meas-ured before and after purification and treatment. Two power transformers were used in this research (6.4: 4.6 MVA, 3 phases, 50 Hz). One of them was filled with purified oil and the other was filled with activated Bentonite treated oil after purification, and then the two power transformers were tested for one year under practical conditions of the operating field. Initial tests have indicated that the use of Activated BENTONITE in the treatment process for the aged transformer oil improved breakdown voltage, water content, total acidi-ty and flash point. Thus activated Bentonite gives an ideal treatment of aged transformer oil with its environmental and economic advantages. Moreover, activated Bentonite is available at many places in Egypt with low costs.

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L. Nasrat, M. Abdelwahab and G. Ismail, "Improvement of Used Transformer Oils with Activated Bentonite," Engineering, Vol. 3 No. 6, 2011, pp. 588-593. doi: 10.4236/eng.2011.36070.

Conflicts of Interest

The authors declare no conflicts of interest.


[1] H. I. Inyang and L. Kaanagbara, “Estimation of Electric Trans-former Service Life from Oil Degradation Kinetics,” Journal of Energy Engineering, Vol. 133, No. 19, 2007, pp. 19-25. doi:10.1061/(ASCE)0733-9402(2007)133:1(19)
[2] T. O. Rouse, “Mineral Insulating Oil in Transformers,” IEEE Elec-trical Insulation Magazine, Vol. 14, No. 3, May-June 1998, pp. 6-16. doi:10.1109/57.675572
[3] B. Garcia, J. C. Burgos, A. M. Alonso and J. Sanz, “A Moistureoo-in-Oil Model for Power Transformer Monitoring – Part I: Theoretical Foundation,” IEEE Transaction on Power Delivery, Vol. 20, 2005, pp. 1417-1422. doi:10.1109/TPWRD.2004.832366
[4] M. G. Danikas, “Breakdown of Transformer Oil,” IEEE Electrical Insulation Magazine, Vol. 6, No. 5, September-October 1990, pp. 27-34. doi:10.1109/57.63080
[5] G. Chen and M. H. Zuber, “Pre-Breakdown Characteristics of Contaminated Power Transformer Oil,” Annual Report - Conference on Electrical Insulation and Dielectric Phenomena (CEIDP 2007), Vancou-ver, 14-17 October 2007, pp. 659-662.
[6] J. R. Lucas, D. C. Abeysundara, C. Weerakoon, K. B. M. I. Perera, K. C. Obad-age and K. A. I. Gunatunga, “Coconut oil Insulated Distribu-tion Transformer,” 8th Annual Conference of the IEE, Sri Lanka, 2001.
[7] K. Longva, “Natural Ester Distribution Transform-ers Improved Reliability and Environmental Safety,” Nordic Insulation Symposium, Trondheim, Norway, 13-15 June 2005.
[8] U. Gafvert, G. Frimpong and J. Fuhr, “Modeling of Dielectric Measurements on Power Transformers,” Cigre, Paris, 1998.
[9] Z. T. Yao and T. K. Saha, “Separation of Aging and Moisture Impacts on Transformer Insulation Degradation by Polarization Measurements,” Cigre, Paris, 2002.
[10] T. V. Oommen, “Vegetable Oils for Liquid Filled Transformers,” IEEE Electrical Insulation Magazine, Vol. 18, No. 1, Janu-ary-February 2002, pp. 6-11. doi:10.1109/57.981322
[11] R. Ferguson, A. Lobeiras and J. Sabau, “Suspended Particles in the Liquid Insulation of Power Transformers,” IEEE Electrical Insulation Magazine, Vol. 18, No. 4, July-August 2002, pp. 17-23. doi:10.1109/MEI.2002.1019902
[12] R. Blue, D. Uttamchan-dani and O. Farish, “Infrared Detection of Transformer Insula-tion Degradation Due to Accelerated Thermal Aging,” IEEE Transactions on Dielectrics and Electrical Insulation, Vol. 5, No. 2, April 1998, pp. 165-168. doi:10.1109/94.671924
[13] I. L. Hosier, A. S. Vaughan, S. J. Sutton and F. J. Davis, “Chemical, Physical and Electrical Properties of Aged Dode-cylbenzene: Thermal Aging of Mixed Isomers in Air,” IEEE Transactions on Dielectrics and Electrical Insulation, Vol. 14, No. 5, 2007, pp. 1113-1124. doi:10.1109/TDEI.2007.4339470
[14] I. L. Hosier, A. S. Vaughan and S. J. Sutton, “Aging Behavior of Dodecylben-zene/Mineral Oil Blends,” Annual Report - Conference on Electrical Insulation and Dielectric Phenomena (CEIDP 2007), Vancouver, 14-17 October 2007, pp. 69-72.
[15] P. Aksamit, D. Zmarzly, T. Boczar and M. Szmechta, “Aging Properties of Fullerene Doped Transformer Oils,” Conference Record of the 2010 IEEE International Symposium on Electrical Insulation (ISEI), San Diego, 6-9 June 2010.

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