Abstract: A modular insulation fluid handling system for protecting insulation fluid of an inductive power device having an expansion vessel and for handling volume variations of the insulation fluid, the modular insulation fluid handling system includes a first protective housing including a resilient reservoir filled with an inert gas, a connector, and an adapter sealably connected to the inside of the resilient reservoir, an interface including a ventilation duct terminal and a reservoir terminal being sealably connected to the adapter, the connector is arranged between the adapter and the interface and configured to be connected to a connector of a second protective housing, and a vessel ventilation duct configured to be sealably connected to the expansion vessel and the ventilation duct terminal. The inside of the resilient reservoir is configured to be in hermetically sealed fluid communication with the expansion vessel via the adapter, the interface and the vessel ventilation duct.

Abstract: A modular insulation fluid handling system for protecting insulation fluid of an inductive power device having an expansion vessel and for handling volume variations of the insulation fluid, the modular insulation fluid handling system includes a first protective housing including a resilient reservoir filled with an inert gas, a connector, and an adapter sealably connected to the inside of the resilient reservoir, an interface including a ventilation duct terminal and a reservoir terminal being sealably connected to the adapter, the connector is arranged between the adapter and the interface and configured to be connected to a connector of a second protective housing, and a vessel ventilation duct configured to be sealably connected to the expansion vessel and the ventilation duct terminal. The inside of the resilient reservoir is configured to be in hermetically sealed fluid communication with the expansion vessel via the adapter, the interface and the vessel ventilation duct.

Abstract: A method for removal of corrosive compounds from insulating oil. The insulating oil is exposed to at least one reducing agent.

Abstract: A semiconductor device comprises means (7) for grading an electric field created in the active part (4) of the device when a high voltage is applied thereacross. Said means comprises a member (7) being of a material having a higher dielectric constant than the material of said active part and applied next to at least a portion of said active part where a high electric field occurs when a high voltage is applied across the device for obtaining a field grading for a condition of changing of said voltage.