Abstract: A method for replacing salts inside a self-regenerating breather device for power electrical apparatus, such as transformers, comprising the following steps: disconnecting said self-regenerating breather device from a suction duct of a power electrical apparatus; rotating and overturning said breather device; opening a lower flange (15) of the breather device; removing a split pin or another closing system and removing a closure net (16) of the tank (12) of said self-regenerating breather device, said tank (12) containing said salts to be replaced; replacing said salts by completely overturning said breather device over a container; further overturning said breather device; filling said tank (12) with new salts.

Abstract: A breather device (1) for dehumidifying air to be supplied into an expansion vessel (103) of a power electrical device (100), said breather device comprising an air demoisturizer unit (2) including one or more tanks (21), each tank having an internal volume (20) accommodating a regenerable moisture absorbing substance and a heater (23) for regenerating said moisture absorbing substance, at least a first opening (25) configured to put the internal volume of said tank in fluid-dynamic communication with the external environment and at least a second opening (22) configured to allow a flow of air to exit from the internal volume of said tank towards another section of said breather device.