Sobhy. S. Dessouky, Saad A. Mohamed Abdelwahab, Mohammed Shaban
Current Transformer (CT) is used to indicate meters and protective relay systems so; the maintenance process is very important and should make regularly. Routine maintenance is done via cleaning the insulations, tighten the screws and follow up the oil level. Periodic electrical tests are insulation tests, turns ratio test and a saturation curve test. Tests results give a good indication of the internal transformer status. In this paper, maintenance of the CT was made by a new proposed technique. In the proposed maintenance technique, the nanoparticles (NPs) are used to treat the low level of electrical insulation. The insulating medium of the CT is mineral oil, it is a hydrocarbon material. In normal operating situations there is no problem but during the faults and short circuit, the transformer oil is dissolved and carbon atoms are formed within the oil. Due to the repetition of operations, CT becomes invalid and must be replacing by another new one, because it is dangerous to individuals and equipment surrounding it. Nanoparticles attract these particles and raise the electrical insulation level of the CT. An electrical insulation test of the CT is performed before and after treatment to ensure the benefits of the new proposed method. The test results of proposed maintenance processes are compared with the traditional method according to the IEC Standards 60044. The results were studied using statistical analysis and explained substantial differences, when using nanoparticles. CT was raised the efficiency and prolonged life span.
Current transformer; nanoparticles; insulation resistance test, dissipation factor and breakdown voltage test.
Cite this paper
Sobhy. S. Dessouky, Saad A. Mohamed Abdelwahab, Mohammed Shaban. (2019) Enhancement the Properties of Electrical Insulation for Current Transformer Using Nano-Particles. International Journal of Instrumentation and Measurement, 4, 31-37