Ruben Saldivar Guerrero | Centro de Investigación de Química Aplicada (CIQA) (original) (raw)
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Bangladesh University of Engineering & Technology
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Papers by Ruben Saldivar Guerrero
IET Generation, Transmission & Distribution, 2012
Ageing of non-ceramic insulation can conduct into failures of the power system, where usually pol... more Ageing of non-ceramic insulation can conduct into failures of the power system, where usually pollution plays an important role in the degradation process. These failures cannot be evaluated by applying IEC 61109 ageing tests, because such tests are considered as screening tests and up to now these tests are quite questionable. Therefore research of new test methods and diagnostic tools are needed to predict long-term performance of non-ceramic insulators. A non-standard method for insulation ageing is modified and used in this work to evaluate non-ceramic components of breakers, bushings and surge arresters. Different diagnostic tests are proposed to analyse the evolution in the degradation process of these apparatus. The results showed that the applied methodology and the proposed tests may evaluate in a more realistic way the performance of new non-ceramic insulating material used in electrical equipment.
Moisture removal in mineral insulating oils by a resinous residue of Opuntia ficus-indica
Innovación tecnológica: No hay un producto " verde " que elimine la humedad (en línea) en el acei... more Innovación tecnológica: No hay un producto " verde " que elimine la humedad (en línea) en el aceite de transformadores de potencia. Abstract The feasibility of application of a resinous residue (RR) found in Opuntia ficus-indica leaves for the elimination of moisture in mineral insulating oils was investigated. The RR was characterized physicochemically by infrared Fourier transform spectroscopy (FT-IR), thermogravimetric analysis (TGA) and solubility and absorption tests. In addition, the mineral insulating oil used in this work was characterized by a Karl Fischer titration and dielectric strength tests. The results of FT-IR indicated the presence of functional groups of type O-H, C=O and C-H mainly. The RR was insoluble in various organic solvents and distilled water. According to the TGA results, the RR sample contains approximately 9 % moisture, 73 % organic components and approximately 18 % residual components. The RR showed a high absorption capacity and moisture retention. The mineral oil increased its dielectric strength after the drying process. The RR of Opuntia ficus-indica is feasible for its application in the removal of moisture (on-line) in the mineral oil of electric transformers.
IET Generation, Transmission & Distribution, 2012
Ageing of non-ceramic insulation can conduct into failures of the power system, where usually pol... more Ageing of non-ceramic insulation can conduct into failures of the power system, where usually pollution plays an important role in the degradation process. These failures cannot be evaluated by applying IEC 61109 ageing tests, because such tests are considered as screening tests and up to now these tests are quite questionable. Therefore research of new test methods and diagnostic tools are needed to predict long-term performance of non-ceramic insulators. A non-standard method for insulation ageing is modified and used in this work to evaluate non-ceramic components of breakers, bushings and surge arresters. Different diagnostic tests are proposed to analyse the evolution in the degradation process of these apparatus. The results showed that the applied methodology and the proposed tests may evaluate in a more realistic way the performance of new non-ceramic insulating material used in electrical equipment.
Moisture removal in mineral insulating oils by a resinous residue of Opuntia ficus-indica
Innovación tecnológica: No hay un producto " verde " que elimine la humedad (en línea) en el acei... more Innovación tecnológica: No hay un producto " verde " que elimine la humedad (en línea) en el aceite de transformadores de potencia. Abstract The feasibility of application of a resinous residue (RR) found in Opuntia ficus-indica leaves for the elimination of moisture in mineral insulating oils was investigated. The RR was characterized physicochemically by infrared Fourier transform spectroscopy (FT-IR), thermogravimetric analysis (TGA) and solubility and absorption tests. In addition, the mineral insulating oil used in this work was characterized by a Karl Fischer titration and dielectric strength tests. The results of FT-IR indicated the presence of functional groups of type O-H, C=O and C-H mainly. The RR was insoluble in various organic solvents and distilled water. According to the TGA results, the RR sample contains approximately 9 % moisture, 73 % organic components and approximately 18 % residual components. The RR showed a high absorption capacity and moisture retention. The mineral oil increased its dielectric strength after the drying process. The RR of Opuntia ficus-indica is feasible for its application in the removal of moisture (on-line) in the mineral oil of electric transformers.