What is one of the primary functions of insulating liquid in substations?

One of the primary functions of insulating liquid in substations is to provide electrical insulation. Insulating liquids, such as mineral oil or synthetic fluids, are used in transformers and other electrical equipment to prevent unwanted electrical currents from traveling between components. This property is crucial in maintaining the integrity and safety of the electrical system. The insulating liquid forms a barrier that withstands high voltages, ensuring that electricity flows only through the intended pathways and preventing short circuits or electrical failures.

While insulating liquids might also assist in temperature regulation by providing some cooling effects, their primary role remains focused on electrical insulation. Unlike enhancing chemical reactions, increasing current flow, or being solely a coolant, the insulation function is vital for the reliable operation of electrical substations, thereby protecting equipment and personnel from hazardous electrical discharges.