Abb Technology Ag

Asea Brown Boveri Ag

Daniel Bleiker

Walter Holaus

Bojan Pavlovic

Diego Sologuren-Sanchez

Herbert Schifko

Miguel Garcia

Jadran Kostovic

Sven Forss

Martin Wieser

Hanspeter Moser

A switching device configurable as a grounding device, a disconnecting device, and a combined disconnecting/grounding device is disclosed. The switching device includes an encapsulating housing, a stationary grounding contact fixed to the housing, a stationary disconnector contact fixed to a first conductor, and a moveable contact that is movable along an axis and engagable with the grounding contact and the disconnector contact. A conductor tube is fixed to a second conductor and accommodates the moveable contact. A drive for driving the moveable contact has a retaining element that is movable along the axis and is guided in the conductor tube. The retaining element accommodates two contact tubes. A first contact tube forms a mating contact of a grounding device containing the stationary grounding contact. A second contact tube forms a mating contact of a disconnector containing the disconnector contact.

Switching device with a disconnection and/or grounding function

The high-voltage switching device used in one installation position and has metallic encapsulation () a switching gap () and a particle trap () for holding foreign body particles (), and is characterized in that in the one installation position, the particle trap () is arranged vertically underneath the switching gap (), in the one installation position, an isolator part () is provided, which has a surface () aligned essentially horizontally and faces the interior of the high-voltage switching device, with a metallic wall (), which is higher than the particle trap (), being arranged between the isolator part () and the particle trap (). The particle trap () has a viewing window (). If the high-voltage switching device is a disconnector, this viewing window () may be identical to the viewing window () for visual access to the visible disconnecting gap () of the disconnector. The high-voltage switching device is used particularly advantageously in a second installation position and has a second particle trap, with the second particle trap arranged vertically underneath the switching gap () in the second installation position. This results in the high-voltage switching device having good operational reliability and a low susceptibility to defects.

High voltage device with a particle trap

A compact earthing switch (') is provided by a mounting lid () of the gas-insulated switchgear assembly () having a concave physical volume () which extends the gas chamber () and by the earthing switch fixed contact () being mounted on an inner side () of the mounting lid () and being arranged at least partially in the physical volume () of the mounting lid (). Exemplary embodiments relate, inter alia, to: an essentially cylindrical mounting lid (); an earthing switch fixed contact () having a physical length (L) which is smaller than an axial physical depth (T) of the physical volume (); and a large diameter (D) of the mounting lid () for simplified mounting and maintenance of active parts) in the switchgear assembly (). Advantages include: the compact design for the grounding device the ability of the earthing switch fixed contact () to be ready-mounted on the mounting lid (); and the integration of the earthing switch fixed contact (), which is integrated in the mounting lid (), in a combined disconnector/earthing switch (&#x2032;).

Compact earthing switch for gas-insulated switchgear assemblies

This switching device has a contact arrangement which is equipped with erosion-resistant contacts and comprises at least one contact which moves along a central axis (2) and at least one mating contact which is provided for receiving the moving contact. One of the two contacts has a finger cage (25) which is provided with individual, sprung contact fingers (13) which are spaced apart from one another by radial slots (26) extended in the direction of the central axis (2). Means are provided which prevent the side edges (29) of the contact fingers (13) being able to touch in the region of the contact surfaces (27) in the front part of the contact fingers (13) when said contact fingers (13) are drawn together in the direction of the central axis (2) , such that welding of the edges (29) of the contact fingers (13) cannot occur.

Electrical switching device

An isolator for a metal-encapsulated, gas-insulated high-voltage switching installation includes two contact supports and an enclosure. The enclosure has a longitudinal axis and is filled with insulating gas. The two contact supports are arranged in the enclosure. Each of the contact supports has a surface. A surface of a first one of the contact supports and a surface of the second one of the contact supports oppose each other to form opposing surfaces and define a separation that forms an isolating gap between the opposing surfaces. The isolator further includes a contact arrangement. The contact arrangement is movable along an operating axis between a connected state and a disconnected state. The contact arrangement electrically conductively shorts the separation when the contact arrangement is in the connected state. The longitudinal axis and the operating axis form a first angle with one another, and the opposing surfaces extend parallel to one another in a region of the isolating gap and are bent through a second angle with respect to the longitudinal axis.

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Zurich, Switzerland

Daniel Bleiker