Title :
Corona at negative impulse stress in SF6 and SF6 -N2-mixtures
Author :
Pfeiffer, W. ; Welke, H.
Author_Institution :
Tech. Hochschule, Darmstadt, West Germany
Abstract :
Measurements of the corona onset voltage for negative impulse stress, single and repeating pulses, in SF6-N2 mixtures are compared with the DC-corona onset voltage. It is shown that the impulse corona onset voltage is some percent lower. Exceptions to this behaviour have been detected only for higher pressures (0.28-0.3 MPa) and a high content of SF6 (above 75%). Whenever impulse corona could be detected, it started always during the first pulse. The first detectable corona pulse started 30 ns after the beginning of the voltage stress
Keywords :
corona; electric breakdown of gases; gaseous insulation; mixtures; nitrogen; sulphur compounds; SF6; SF6-N2 mixtures; corona onset voltage; negative impulse stress; Cathodes; Corona; Delay; Pulse generation; Q measurement; Space vector pulse width modulation; Stress; Sulfur hexafluoride; Testing; Voltage;
Conference_Titel :
Electrical Insulation and Dielectric Phenomena, 1988. Annual Report., Conference on
Conference_Location :
Ottawa, Ont.
DOI :
10.1109/CEIDP.1988.26338
