An electrical feed-through, such as a PCB connector, involves at least one positioning protrusion protruding from a main body, and may further include multiple positioning protrusions protruding in respective directions from the main body. A data storage device employing such a feed-through includes an enclosure base with which the feed-through is coupled. The base includes an annular recessed surface surrounding an aperture that is encompassed by the feed-through and is at a first level, and at least one recessed positioning surface at a higher level than the first level, and extending in a direction away from the annular recessed surface. The positioning protrusion of the electrical feed-through contacts the recessed positioning surface of the base, such that the position of the feed-through is constrained by the recessed positioning surface.

A method for estimating the remaining useful life of a pressure compensator of a subsea arrangement, the method including determining displacement data related to displacements of the pressure compensator during a time period; and estimating the remaining useful life of the pressure compensator in relation to a failure mode of the pressure compensator based on the determined displacement data of the pressure compensator. A system including a subsea arrangement and a control system, a computer program product, and a computer program, are also provided.

A heat exchanging arrangement for a subsea electronic system, the heat exchanging arrangement including a wall section; a corrugation formed in the wall section, the corrugation having two generally opposing internal corrugation surfaces; and at least one heat exchanging element forced against at least one of the internal corrugation surfaces. A subsea electronic system including a heat exchanging arrangement is also provided.

A cooling arrangement may include a fluid-tight housing in which a power electronics system and a dielectric fluid for cooling the power electronics system may be arranged. The dielectric fluid may be in heat-transferring contact with the power electronics system and may cool the power electronics system via a fluid movement. The fluid movement may be provided via acceleration forces acting on the cooling arrangement.

An electrical feed-through, such as a PCB connector, involves at least one positioning protrusion protruding from a main body, and may further include multiple positioning protrusions protruding in respective directions from the main body. A data storage device employing such a feed-through comprises an enclosure base with which the feed-through is coupled, where the base comprises an annular recessed surface surrounding an aperture that is encompassed by the feed-through and is at a first level, and at least one recessed positioning surface at a higher level than the first level and extending in a direction away from the annular recessed surface. The positioning protrusion of the electrical feed-through physically mates with the recessed positioning surface of the base, such that the position of the feed-through is vertically constrained by the recessed positioning surface.

A cooling arrangement may include a fluid-tight housing in which a power electronics system and a dielectric fluid for cooling the power electronics system may be arranged. The dielectric fluid may be in heat-transferring contact with the power electronics system and may cool the power electronics system via a fluid movement. The fluid movement may be provided via acceleration forces acting on the cooling arrangement.

A converter station for the transmission of electrical power has a diode rectifier with a DC terminal and an AC terminal. At least one transformer is connected to the AC terminal. In order to render the converter station as compact as possible, the diode rectifier is arranged in an insulating material.

An electrical apparatus, including a first housing having a fluid-filled or fluid-perfused wet space and a dry space that are separated from one another by a wall, wherein the wall includes an opening, one or more power-conducting and/or power-switching elements arranged in the wet space, and a control electronics for the one or more power-switching elements arranged in the dry space. The electrical apparatus includes a second housing extending from the opening into the wet space, wherein the second housing reaches up to or encloses a power-conducting element, and a sensor arranged in the second housing, the sensor being configured to measure a variable that depends on an electrical power flowing through the power-conducting element. The second housing seals the opening in the wall in a fluid-tight manner. Measured values or signals of the sensor conducted by lines are passed through the opening into the dry space.

A pressure compensated subsea arrangement for housing of electric components. The arrangement includes a pressure compensated housing. The pressure compensated housing is filled with a dielectric liquid. The arrangement includes at least one electric component. The at least one electric component is provided inside the pressure compensated housing. The dielectric liquid is a hydrocarbon dielectric liquid including isoparaffin. There is also provided a method of manufacturing such an arrangement.

An enclosure for an electronic system that is configured to act as a heat exchanger to remove heat from a cooling liquid that is circulated through the electronic system for cooling the electronic components thereof which are submerged in the cooling liquid in direct contact therewith. The enclosure uses an arrangement of a combination of external fins on one or more walls and fluid passages formed in one or more of the walls through which the cooling liquid is circulated for cooling. The fluid passages and the external fins are preferably formed on the same wall. The fins and the fluid passages can be formed on any number of walls of the enclosure.