1. General

1.1 The role of insulating liquids in electrical engineering

Insulating liquids are used as impregnants for solid insulation or as fillers for a wide range of electrical equipment: transformers (power, distribution, traction, furnace, measurement, etc.), reactors, capacitors, cables, bushings, circuit breakers, tap changers, etc. [8] .

Their main role is to remove air and other gases to improve the dielectric strength of the insulation (the dielectric strength of liquids is much higher than that of gases ...