METHOD FOR WET CLEANING OF ELECTRICAL EQUIPMENT Russian patent published in 2023 - IPC B08B3/08 C23G5/02 B08B5/00 

FIELD: power supply systems.

SUBSTANCE: maintenance of power supply systems and process equipment and maintenance, repair and scheduled work. Applying an initial dielectric cleaner to the contaminated surfaces of the elements and assemblies of electrical equipment by means of a directed jet to ensure complete coverage of the contaminated surfaces with the specified cleaner, in washing off softened contaminants with the help of a directed jet of the finishing dielectric cleaner, blowing the elements and assemblies of electrical equipment with an air jet and removing the washed off contaminants. The impact of the initial dielectric cleaner is carried out with a specific consumption of 0.03 to 0.08 l/m², the exposure time for the necessary weakening of the adsorption bond is set in the range from 5.0 to 20.0 min, while the composition is used as the final dielectric cleaner, including the following components, wt.%: methyl perfluoroisobutyl ether 30-50, methyl nonafluorobutyl ether 20-50, isoparaffin - the rest. Flushing of contaminants is carried out with a pulse jet with a specific consumption of the finishing cleaner from 0.5 to 1.0 l/m² using a head with a nozzle located at a distance of 5.0-15.0 cm from the surfaces to be cleaned, and a jet pulsation frequency in the range from 1.0 to 10.0 Hz. Removal of residual contaminants is carried out using a vacuum pump. As the initial dielectric cleaner, two versions of the composition are used, % by weight, composition: 1) 2-(2-butoxyethoxy) ethyl acetate 30-50; mixtures of isoparaffins 10-30; bromotrifluoromethane up to 20; the rest is surfactant; 2) mixtures of isoparaffins up to 80, calcium dinonylnaphthalenesulfonate 0.5-2.0; bromotrifluoromethane up to 20; the rest is surfactant. The impact of the final dielectric cleaner jet is carried out under pressure from 0.3 to 25 MPa.

EFFECT: increasing of the efficiency of cleaning, the safety of work when working under voltage, as well as reduction of the consumption of dielectric cleaners.

6 cl