An electrical apparatus includes a housing including an opening, an electronic component in the housing, electrical wires connected to the electronic component and extending out of the housing through the opening, a plug extending in a first direction and inserted in the opening with the electrical wires passing through the opening, and a waterproofing material in the opening. The plug includes a first outer peripheral surface matching an inner wall surface of the opening, and a second outer peripheral surface opposite and spaced apart from the inner wall surface of the opening. The electrical wires are between the second outer peripheral surface and the inner wall surface of the opening.

An electrical apparatus includes a housing including an opening, an electronic component in the housing, electrical wires connected to the electronic component and extending out of the housing through the opening, a plug extending in a first direction and inserted in the opening with the electrical wires passing through the opening, and a waterproofing material in the opening. The plug includes a first outer peripheral surface matching an inner wall surface of the opening, and a second outer peripheral surface opposite and spaced apart from the inner wall surface of the opening. The electrical wires are between the second outer peripheral surface and the inner wall surface of the opening.

A storage device for mobile provision of data at a technical installation includes a first connector for mechanical connection to a complementary mating connector, a second connector adjoining the first connector, and a housing enclosing the first connector and the second connector. The second connector can releasably receive a storage medium in a receptacle and can contact power and data connections of the storage medium when the storage medium is in the receptacle. The first connector is coupled to the second connector and, as a result of the coupling, the power and data connections of the storage medium can be contacted via the first connector. The first connector is a round plug connector with a connecting element having a circular cross-section or a heavy-duty connector.

Protective cover devices for associated electrical connectors include a one-piece molded polymeric body including at least one of: (i) at least one stud that is closely slidably received into a corresponding socket of the connector; (ii) a skirt that comprises a recess that receives at least part of the electrical connector therein. The protective cover device is adapted to be engaged with the associated electrical connector to inhibit contact between a surrounding corrosive atmosphere and at least one electrical contact of the associated electrical connector.

Protective cover devices for associated electrical connectors include a one-piece molded polymeric body including at least one of: (i) at least one stud that is closely slidably received into a corresponding socket of the connector; (ii) a skirt that comprises a recess that receives at least part of the electrical connector therein. The protective cover device is adapted to be engaged with the associated electrical connector to inhibit contact between a surrounding corrosive atmosphere and at least one electrical contact of the associated electrical connector.

A connector housing for an electrical plug connector includes a cable duct and an oscillation suppressor pivotable about a pivot axis into the cable duct. The cable duct receives an electrical cable of a predefined outer diameter along a plug-in direction. The cable duct in a cross section perpendicular to the plug-in direction has a clear dimension in a pivoted state of the oscillation suppressor in the cable duct equal to or less than the predefined outer diameter of the electrical cable.

A connector housing for an electrical plug connector includes a cable duct and an oscillation suppressor pivotable about a pivot axis into the cable duct. The cable duct receives an electrical cable of a predefined outer diameter along a plug-in direction. The cable duct in a cross section perpendicular to the plug-in direction has a clear dimension in a pivoted state of the oscillation suppressor in the cable duct equal to or less than the predefined outer diameter of the electrical cable.

Various techniques are provided for displacing air from partial discharge sensitive regions of a connector of a low partial discharge high voltage connector to other regions of the low partial discharge high voltage connector where electrical flux is reduced. A plug member is mated with a receptacle member to provide the connector, with a seal member disposed in a cavity provided by the plug member and/or the receptacle member. In response to the mating, the seal member is compressed at an initial contact region between an innermost layer and an outermost layer of the seal member. In response to the compressing, air is forced radially inward toward the innermost layer and radially outward toward the outermost layer away from the initial contact region to reduce partial discharge associated with the connector. Additional methods and systems are also provided.

There is provided an electric apparatus that can suppress the number of components from increasing and hence can suppress the production cost from rising, while providing a mechanism for covering a ventilation hole. The electric apparatus includes a case provided with a ventilation hole penetrating an outer wall, a protective member for covering outside of the ventilation hole, and one or both of a bracket for mounting the case to an external object and an external connector for electrically connecting an electronic component with outside; the protective member is a part of the bracket or a part of the external connector; a communication path for making the outer opening portion of the ventilation hole communicate with outside is provided between the outer wall and the protective member.

There is provided an electric apparatus that can suppress the number of components from increasing and hence can suppress the production cost from rising, while providing a mechanism for covering a ventilation hole. The electric apparatus includes a case provided with a ventilation hole penetrating an outer wall, a protective member for covering outside of the ventilation hole, and one or both of a bracket for mounting the case to an external object and an external connector for electrically connecting an electronic component with outside; the protective member is a part of the bracket or a part of the external connector; a communication path for making the outer opening portion of the ventilation hole communicate with outside is provided between the outer wall and the protective member.