Practical Results for Breakdown Voltage around Single and Multi-Contaminating Particles with Disc and Conical Spacers under D.C Voltage

Year 2026, Volume: 10 Issue: 2 , 649 - 660 , 01.05.2026

Amr Youssef

https://doi.org/10.31127/tuje.1838637

https://izlik.org/JA69MC36KH

Abstract

For gas-insulated transmission lines (GITL) and gas-insulated substations (GIS) systems, the most important dielectric design factor has been the conjunction of metallic particle contamination with spacers. The breakdown voltage tests in this work are conducted in a test chamber that is 12 cm wide and 50 cm long and can sustain pressures of up to 5 bars. The electrode system is installed in a chamber at room temperature that is either packaged with air or Sulfur hexafluoride (SF6) gas. The electrode setup adopted in this test comprises two parallel plane electrodes joined by an Epoxy Resin spacer inside the test tank. Spacers are made using the epoxy resin substance. Bisphenol-A and an anhydride hardener are the two ingredients of epoxy resin. In this study, we prepare various amounts of Bisphenol and hardener, which are then combined to form an epoxy resin material. The ideal concentration of these substances is then selected to create different spacer shapes, such as conical and disc spacers. Breakdown voltage values are examined in relation to single and multiple contaminants, such as wire and spherical particles. Additionally examined is the impact of various spacer shapes, including disc and conical spacers, as well as the existence of different contaminating particles, on the breakdown voltage values that are observed. The calculated and measured breakdown voltage values are compared.

Keywords

Breakdown Voltage , Disc Spacer , Conical Spacer , Contaminating Particles

Ethical Statement

Ethical Statement 1. Authorship and Contributions: Amr Ameen Youssef: Conceptualization, Methodology, Practical Measurements, Data curation, Writing-Reviewing, and Editing. 2. Originality and Plagiarism: This manuscript is the original work of the author. The text, data, figures, and ideas presented herein have not been plagiarized. All sources of information, including texts, ideas, and data from other works, have been appropriately cited and referenced in accordance with academic standards. 3. Data Integrity and Reproducibility: The experimental data presented in this paper are genuine, authentic, and accurately reflect the research performed. No data have been fabricated, falsified, or manipulated to support the hypotheses or conclusions. 4. Conflict of Interest: The author declare that there are no conflicts of interest, financial or personal, that could have influenced the work reported in this paper. 5. Funding Sources: This research received no external funding. 6. Prior Publication: This work has not been published previously and is not under consideration for publication elsewhere.

Supporting Institution

None

Project Number

1838637-AF-T0-V0-20251208214427

Thanks

None

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