started without causing an overcurrent and therefore without tripping protection of the electrical power supply circuit bzt related characteristics of the cooling liquid according to an embodiment of the invention are obtained using a concentration of bzt equal to 2 the bzt content of 5 avoids the need for any other corrosion inhibitors because it inhibits corrosion of copper steel aluminium stainless steel brass and nickel these metals being the most frequently found in electronic cooling circuits and in other domains this proportion of 5 is not natural it is greater than the dilution threshold of bzt in water alone 2 the presence of mpg at concentrations according to an embodiment of the invention enables this dilution at a high content the final product is stable and does not precipitate this effect is observed starting from a 33 concentration of mpg the optimum with the other desired characteristics is achieved for a 40 concentration of mpg the mpg also acts as antifreeze therefore the use of a mix of mpg and bzt at concentrations according to an embodiment of the invention can eliminate known disadvantages of mpg mentioned above in environments in which there are high voltages the use of pure water can reduce the conductivity of the liquid obtained in an embodiment water with an electric conductivity of not more than 15 microsiemens cm is used dosing of biocides is conventional one example is biocides in the quaternary ammoniums family one or several of them are used it will be appreciated that other biocides can be used although the invention has been illustrated with a benzotriazole a triazole in one of the following families could also be used instead although the list is not exhaustive one of.