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Surface flashover of micro TiO2 epoxy composite dielectric under nanosecond pulse in transformer oil

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7 Author(s)
Zeng-Bin Wang ; State Key Lab. of Electr. Insulation & Power Equip., Xi''an Jiaotong Univ., Xi''an, China ; Yong-Hong Cheng ; Chen, Yu ; Guo-Dong Meng
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Micro TiO2/epoxy composite samples with different filler weight percentage were prepared. Their flashover voltages under the 50ns (rise time)/2.5μm (half-height width time) pulse in transformer oil were measured. The results of surface flashover voltages as the number of flashovers, weight percentage of the filler, fluid pressure and the steepness of the pulse were presented. It is demonstrated that the flashover strength of epoxy composite can be enhanced by filling with a huge mount of micro TiO2. Moreover, the results also show that the flashover characteristic of epoxy is significantly affected by the number of flashovers, fluid pressure and the steepness of the pulse.

Published in:

Solid Dielectrics (ICSD), 2010 10th IEEE International Conference on

Date of Conference:

4-9 July 2010