Experimental study on the electrical characteristics of different volume fraction waterethylene glycol mixtures charged in microseconds

Using the water and ethylene glycol mixtures with volume fraction of 36.5%,48.7%,59.0% and 71.2% as the dielectric of the coaxial transmission line, experimental research on the breakdown of mixtures when the inner conductor was charged negative voltage in microseconds was conducted. the breakdown strength,breakdown time,relative permittivity and resistivity of the mixtures as a function of volume fraction was studied. Compared the mixture of 71.2% to the mixture of 36.5%, the results show that the breakdown strength increased 25.1% and the breakdown time delayed 10.49%,but the relative permittivity decreased 7.91%. Furthermore, the breakdown strength of mixtures increased with the decrease of the charge time.