Abstract
The influence of the superimposition of positive impulses on negative DC pre-stressed conductor-rod gaps with spacing of 50 cm is investigated. Previous experiments have shown that when a conductor of 2 cm in diameter is used a marked increase in the dielectric strength of the gap is observed when negative DC voltages between 100 kV and 125 kV in value are applied at the rod; this is not the case for a 3 cm conductor. This paper provides new data concerning the above phenomenon; by applying higher values of pre-stressing voltage a similar behaviour as with the 2 cm conductor is observed for the 3 cm conductor. The discharge mechanism is discussed taking into consideration parameters affecting the above behaviour, such as the value of the pre-stressing DC voltage, the waveshape of the applied impulse voltage and the variation of absolute humidity.
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References
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Mikropoulos, P.N., Stassinopoulos, C.A., Yakinthos, C.G. (2004). Negative DC Pre-Stressing on Conductor-Rod Gaps under Positive Impulse Voltages. In: Christophorou, L.G., Olthoff, J.K., Vassiliou, P. (eds) Gaseous Dielectrics X. Springer, Boston, MA. https://doi.org/10.1007/978-1-4419-8979-6_32
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DOI: https://doi.org/10.1007/978-1-4419-8979-6_32
Publisher Name: Springer, Boston, MA
Print ISBN: 978-1-4613-4745-3
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