scholarly journals Effect of temperature on AC breakdown voltage of nanofilled transformer oil

2018 ◽  
Vol 12 (1) ◽  
pp. 138-144 ◽  
Author(s):  
Amr M. Abd-Elhady ◽  
Mohamed E. Ibrahim ◽  
T.A. Taha ◽  
Mohamed A. Izzularab
Keyword(s):  
Breakdown Voltage ◽  
Transformer Oil ◽  
Effect Of Temperature

Experimental evaluation of thermal conductivity, viscosity and breakdown voltage AC of nanofluids of carbon nanotubes and diamond in transformer oil

2015 ◽  
Vol 58 ◽  
pp. 115-121 ◽  
Author(s):  
Douglas Hector Fontes ◽  
Gherhardt Ribatski ◽  
Enio Pedone Bandarra Filho
Keyword(s):  
Thermal Conductivity ◽  
Carbon Nanotubes ◽  
Breakdown Voltage ◽  
Experimental Evaluation ◽  
Transformer Oil

scholarly journals Lightning Impulse Breakdown Voltage of Rice Bran Oil for Transformer Application

Energies ◽  
2021 ◽  
Vol 14 (16) ◽  
pp. 5084
Author(s):  
Mardhiah Hayati Abdul Hamid ◽  
Mohd Taufiq Ishak ◽  
Nur Sabrina Suhaimi ◽  
Jaafar Adnan ◽  
Nazrul Fariq Makmor ◽  
...  
Keyword(s):  
Weibull Distribution ◽  
Electric Fields ◽  
Breakdown Voltage ◽  
Rice Bran ◽  
Rice Bran Oil ◽  
Transformer Oil ◽  
Uniform Field ◽  
Testing Methods ◽  
Lightning Impulse ◽  
The Difference

Transformer oil does not only serve as an insulating liquid, but also in removing heat from the windings and cores. Mineral oil (MO) has been widely used in transformers for more than 150 years. Recently, researchers have attempted to search for alternative insulating oils due to the possibility that MO will run out in the future together with the concern on fire safety and environmental pollution. Among the potential oils is rice bran oil (RBO). This work presents the studies of the lightning impulse (LI) of RBO behavior under various electric fields, gap distances and testing methods. The electrical performances of LI tests show that RBO and Palm Oil (PO) have lower LI breakdown voltage than MO under both uniform and non-uniform electric fields. However, the difference in LI breakdown voltages between RBO, PO and MO are slightly small which is less than 20%. In addition, there is no significant effect in the various testing methods under both uniform field and non-uniform field where the percentages of difference are less than 12% and 8% respectively. The data of LI breakdown voltage were statistically analysed to predict the withstand voltage and 50% breakdown voltage of oil samples by using Weibull distribution. The Weibull distribution of MO, PO and RBO has well fit with the fitting line. Finally, the relationship between LI voltages under a non-uniform field with various parameters of PO and RBO was obtained and proposed. From this work, it can be concluded that RBO shows promising results to be considered as an alternative to MO in transformer applications.

The Effect of Temperature on GPC for the Separation of PCBs from Transformer Oil and Subsequent Analysis by GC-MSD

1995 ◽  
Vol 60 (2-4) ◽  
pp. 195-202 ◽  
Author(s):  
B. R. Sheridan ◽  
G. Poole ◽  
E. Dowdall ◽  
C. Chiu
Keyword(s):  
Transformer Oil ◽  
Effect Of Temperature

Effect of liquid motion on breakdown voltage under divergent electric fields in transformer oil

2002 ◽  
Author(s):  
R. Hanaoka ◽  
R. Ishibashi ◽  
T. Aoyagi ◽  
Y. Asada ◽  
T. Nishi
Keyword(s):  
Electric Fields ◽  
Breakdown Voltage ◽  
Transformer Oil ◽  
Liquid Motion

Modelling by design of experiments method of the AC breakdown voltage of transformer oil point–plane gaps with insulating barrier

2016 ◽  
Vol 10 (1) ◽  
pp. 232-239 ◽  
Author(s):  
Mohamed Zitouni ◽  
Fettouma Guerbas ◽  
Larbi Boukezzi ◽  
Ahmed Boubakeur
Keyword(s):  
Design Of Experiments ◽  
Breakdown Voltage ◽  
Transformer Oil

Effect of temperature on the breakdown voltage of paper-covered conductor impregnated with various liquids

1988 ◽  
Vol 23 (3) ◽  
pp. 475-483 ◽  
Author(s):  
D.F. Binns ◽  
A.B. Crompton ◽  
A. Jaberansari
Keyword(s):  
Breakdown Voltage ◽  
Effect Of Temperature

Properties of Hard Rubber. XVIII. Action of Hydrocarbon Oils at High Temperatures (Part XV of Swelling of Rubber)

1947 ◽  
Vol 20 (1) ◽  
pp. 171-172
Author(s):  
J. R. Scott
Keyword(s):  
Petroleum Ether ◽  
Plastic Flow ◽  
High Temperatures ◽  
Critical Value ◽  
Transformer Oil ◽  
Aliphatic Hydrocarbons ◽  
Effect Of Temperature ◽  
Pronounced Change ◽  
Noticeable Effect ◽  
Two Samples

Abstract It has already been shown that liquids consisting essentially of aliphatic hydrocarbons, e.g., petroleum ether, paraffin, and transformer oil, had practically no swelling action at 34° C on two samples of hard rubber composed of rubber and sulfur only. Hard rubber shows a pronounced change in properties at temperatures above a critical value (“yield temperature”) in the neighborhood of 50° –80° C, the most noticeable effect being that it becomes much softer and more susceptible to plastic flow. It seemed likely, therefore, that the swelling action of liquids such as those mentioned above might be much greater at temperatures above this critical value. This view was strengthened by the statement of Dunton and Muir that hard rubber is “badly attacked” by immersion for 7 days in “hot” transormer oil. As no data appear to have been published on the effect of temperature on the swelling of hard rubber, experiments were made to examine this effect. Details of the hard rubber samples used are as follows.

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