Papers by Keyword: Insulators

Abstract: In this manuscript, we analyze the viability of waterborne polyurethanes (WPU) and compounds derived from WPU mixtures, for applications of these materials in the electrical, electronic, and energy fields as insulation and anti-electrostatic applications. In the current research, several applications type of neat WPU, with any reinforcement, and WPU polymer blends have been studied and compared with standard criterions from the International Electrotechnical Commission (IEC) and Standardization Association from Spain (UNE). To analyze the feasibility in different industrial applications selected, certain compounds obtained from the WPU blends were analyzed regarding their use in eleven low requirement insulator and anti-electrostatic applications. The research and analysis developed in this manuscript used standard data from the UNE – IEC norms, and these standard values were compared with the obtained research values from scientific literature and recent research published experiences. The obtained results were used to provide an application list that could be helpful for industrial applications. In this research, the analyzed WPU compounds neat WPU, Fe3O4 WPU composites, among other nanocomposites WPU blends, which has been currently published in research works, journals, and conferences. We have discovered some possible useful applications for WPU with any reinforcement, mainly as insulators and for WPU nanocomposite blends for anti-electrostatic uses, mainly dielectric and mechanical features compared, however other test types are needed to obtain like flame resistance, thermal behavior, or another key aspect to analyze in deep.

Abstract: This article investigates the characteristics of cap and pin glass insulator and its enhancement due to contamination particles or elements by means of laboratory experiments. The insulator surface is simulated for dry conditions as well as its changes under wet conditions. To find the influence of the contamination layers on the leakage current and voltage distribution, various levels of the ESDD of the insulators were applied in the study. Additionally, experimental results show that the higher contamination level of insulator may have lower breakdown voltage especially in wet condition.

Abstract: This paper describes a system for the online monitoring of insulators contamination, the system monitors equivalent salt deposit density near insulators on the power system by using optical technology. This paper mainly analyzes contamination components on optical sensor surface of different pollution sources coming from 17 sites in Sichuan, the inland areas of China, and draws the conclusion that calcium sulfate of industrial sources is more than ones of agricultural sources.

Abstract: Most high-voltage faults are caused by the insulation degradation of electrical equipment, while partial discharge is the main reason of insulation breakdown of electrical equipment. This paper introduces partial discharge types of GIS, transformer, switchgear and other substation equipment based on the study of partial discharge types and summarizes five types of partial discharge of substation equipment, namely: spike discharge, free particle discharge, insulation defects discharge, surface discharge and suspended click discharge.