Open AccessBreakdown Characteristic of N2-CO2 Gas Mixtures under AC and DC Test Voltages
Author(s) -
Noor Mazliza Badrul Sham,
NABILA ZAHID,
M. S. Kamarudin,
Nor Akmal Mohd Jamail,
Rahisham Abd Rahman
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1874/1/012027
Subject(s) - electric field , breakdown voltage , voltage , electrode , bar (unit) , plane (geometry) , materials science , analytical chemistry (journal) , sulfur hexafluoride , intensity (physics) , field (mathematics) , electrical engineering , stress (linguistics) , gas pressure , chemistry , optics , physics , geometry , mathematics , chromatography , linguistics , philosophy , organic chemistry , quantum mechanics , meteorology , petroleum engineering , pure mathematics , engineering
This study provides fundamental knowledge on the breakdown properties of N 2 -CO 2 gas mixture with a ratio of 20:80, 50:50, and 80:20. The gas mixtures were tested under HVAC and HVDC voltages with 1 bar (abs) pressure. The plane-plane and needle-plane electrodes were used with gap lengths between 0.5 cm to 2.5 cm. It is found that the breakdown voltage of N 2 -CO 2 mixture increased with the increased of CO 2 content. The breakdown voltage is also affected by the increment of gap distance for both electrode geometrics; plane-plane to represent the uniform field and needle-plane as the non-uniform field. The gas under uniform field configuration has a higher ability to withstand higher voltage levels compared under non-uniform field configuration. However, the non-uniform field provides a very high electric field intensity, which implies very high electric field stress. By increasing the percentage CO 2 in N 2 -CO 2 mixture, the insulation strength can reach about 64% that of pure SF 6 gas at the 0.1 MPa.