Method and apparatus, for preventing the power transformer in explosion and fire

摘要

The present invention relates to a kind of transformers for protecting to explosion and fire; transformer (1) includes casing (2) full of flammable coolant (7), comprising: the electrical isolation (1) that detection disconnects transformer uses pressure sensor (11); It is partly discharged in coolant (7) shell and uses drain valve (15) containing (2); And it cools at least part coolant (7) and the bottom (2) of shell is entered to cause a sensation coolant (7) and rinse oxygen positioned at close to coolant by injection pressurized inert gas (16). Device for the above method, including at least one pressure sensor (11) and coolant temperature sensor (7), optionally coolant steam sensing element, it is contained in shell (2) and has interconnected preferably via control unit and coolant (7) drain valve (15), the inert gas entrance valve (18) of coolant (7) inlet check valve (10) and (16).