Experimental Study on Ignition and Combustion Behaviors of Insulation Fluids for Transformer using Cone Calorimeter

Abstract

Silicone liquid has the high performance in fire safety showing fire resistance by self-extinguishing, and that is less environmentally pollutant compared with mineral oil. Applicability of silicone liquid of 20cSt to transformers was investigated from the view point of the correlation of ignition time with critical radiant heat flux. The same tests were carried out using a mineral oil and synthetic ester oil. The basic properties of silicone liquid (20cSt) obtained from the series of the tests were verified in its application as a less-flammable transformer fluid.