Title :
A study of voltage withstand of various gases under AC voltage
Author :
Tiamkatok, W. ; Chotigo, Supakit
Author_Institution :
Dept. of Electr. Eng., King Mongkut´s Univ. of Technol. Thonburi, Bangkok, Thailand
Abstract :
At present, equipments in Gas Insulated Substation(GIS) such as circuit breaker, ground switch, busbar and transformer use SF6 as its insulation because of its better electrical withstand, less area for installation and arc quenching for circuit breaker. However, SF6 has high cost. Furthermore, it causes green house effect and poisonous environment. In this research, the voltage withstand of Ar, He, O2, CO2, Air, and N2 was studied to compare with that of SF6. The voltage withstand of each gas under 50 Hz AC voltage was studied using a chamber designed following ASTM D 2477-96 which consists of rod-plane and sphere-plane gap made of stainless steel. Gap distances in this experiment were 5, 10, 15 and 20 mm while the gas pressures were varied to 1, 2 and 3 bars. The results show that He has the lowest voltage withstand compared to other gases at the same gap distance and pressure.
Keywords :
SF6 insulation; argon; carbon compounds; electric breakdown; electric strength; gas insulated substations; helium; nitrogen; oxygen; AC voltage; ASTM D 2477-96 chamber; Ar; CO2; He; N2; O2; SF6; busbar; circuit breaker; frequency 50 Hz; gas insulated substation; gas pressures; ground switch; pressure 1 bar to 3 bar; rod-plane gap; sphere-plane gap; stainless steel; transformer; voltage withstand; Circuit breakers; Conference proceedings; Electrodes; Gases; Power transformer insulation; Sulfur hexafluoride; Breakdown voltage; Characteristic; Dielectric Strengths; Gases; Insulation;
Conference_Titel :
Electrical Insulating Materials (ISEIM), Proceedings of 2011 International Conference on
Conference_Location :
Kyoto
Print_ISBN :
978-4-88686-074-3
DOI :
10.1109/ISEIM.2011.6826360
