Patent ID: 8264804

Claim:
A device for preventing the explosion of an element of an electrical transformer provided with a tank containing a combustible cooling fluid, comprising: a pressure release element coupled to an outlet of the tank for decompressing the tank; a gastight inflatable bag coupled to an outlet orifice, said gastight inflatable bag being coupled to the outlet orifice with a sealed gastight connection downstream of the pressure release element and configured to pass from a substantially un-inflated state to a gas inflated state upon the rupture of the pressure release element and for confining fluid passing through the pressure release element such that the combustible cooling fluid be stored in the gastight inflatable bag; wherein the pressure release element is configured to rupture such that a substantially unrestricted release of fluid occurs from the tank to the gastight inflatable bag when a predetermined pressure occurs in the tank, and a channel for introducing inert gas downstream of the pressure release element to expel combustible gases towards the gastight inflatable bag.