Abstract:
The gas-insulated HV switching device comprises a contact arrangement with two arcing contacts, one of which being designed as a contact tulip (21), an auxiliary nozzle (40) enclosing at least partially the contact tulip (21) and a tubular electrostatic shield (42), which protrudes along an axis (A) beyond a free end of the contact tulip (21). In order improve the switching performance of the switching device the tubular electrostatic shield (42) is electrically connected to the contact tulip (21) and is integrated in an electrical circuit comprising a current limiter (resistors 43, 44) and extending from the shield (42) through the current limiter to an end of the contact tulip (21) which is arranged opposite its free end.
Abstract:
A contact arrangement has a symmetry axis (z) and comprises at least a first elongated contact (4c) and at least a second elongated contact (4d). At least one of the contacts (4c, 4d) is movable linearly along the axis (z) relatively to the other contact (4d, 4c) and contacts it electrically and mechanically, the electrical and mechanical contact occurring at a front face (13) of each contact (4c, 4d). The first and/or the second contact (4c, 4d) is at least partially hollow, thereby forming a hollow space (6a, 6b) in its interior. A diameter, with regard to the axis (z), of the hollow space (6a, 6b) of the first and/or the second contact (4c, 4d) varies along at least a section of the hollow space (6a, 6b) and the hollow space (6a, 6b) has an opening (8a, 8b) on the front face (13) of the first and/or the second contact (4c, 4d).
Abstract:
A contact arrangement has a longitudinal axis (z) and comprises a first contact group (3a, 4a) with a first contact (3a) and a second contact (4a) and a second contact group (3b, 4b) with a third contact (3b) and a fourth contact (4b). The first contact (3a) interacts electrically and mechanically with the third contact (3b),and/or the second contact (4a) interacts electrically and mechanically with the fourth contact (4b), for closing and opening the contact arrangement. At least one mechanical coupling (2) is provided for transmitting an actuation force to the second contact group (3b, 4b) and thereby moving the second contact group (3b, 4b). The at least one mechanical coupling (2) is adapted to move the third and the fourth contact (3b, 4b) in such a way that their speeds differ along at least a portion of a travel path of the third contact (3b) or along at least a portion of a travel path of the fourth contact (4b).
Abstract:
A gas insulated high voltage circuit breaker (1) comprises: a first arcing contact (31) and a second arcing contact (41), wherein at least one of the two arcing contacts (31, 41) is axially movable along an axis (A-A'); and a nozzle (32) surrounding an axially extending channel (33), wherein during a breaking operation, an arc between the first arcing contact and the second arcing contact is formed in an arcing region in the channel (33), wherein at least a part of an inner surface of the nozzle (32) is coated with a first ceramic coating (34) in order to protect it from an influence of the arc.
Abstract:
Dieser Leistungsschalter weist in einer mit einem Isoliergas gefüllten Kapselung mindestens eine mit dem Isoliergas gefüllte, entlang einer Längsachse (2) erstreckte und im wesentlichen radialsymmetrisch aufgebaute, mindestens zwei Leistungskontakte (5,6) und einen diesen zugeordneten Lichtbogenraum (4) enthaltende Löschkammer (1) auf. Der Lichtbogenraum (4) steht mit mindestens einem, ein Auspuffvolumen (12) aufweisenden Auspuff in Wirkverbindung, welcher für die Kühlung von bei Ausschaltungen entstehenden Heissgasen ausgebildet ist. Der Auspuff ist mit einem Löschkammervolumen (22) verbunden. Die Ausschaltleistung dieses Leistungsschalters soll deutlich erhöht werden, wobei der Auspuff vergleichsweise einfach und kostengünstig aufgebaut werden soll. Dies wird dadurch erreicht, dass im Bereich des Auspuffs mindestens ein, den Strömungswiderstand der Heissgase erhöhendes, zwangsweise erzeugtes Rezirkulationsgebiet (29) vorgesehen wird.
Abstract:
A contact arrangement has a longitudinal axis (z) and comprises a first contact group (3a, 4a) with a first contact (3a) and a second contact (4a) and a second contact group (3b, 4b) with a third contact (3b) and a fourth contact (4b). The first contact (3a) interacts electrically and mechanically with the third contact (3b),and/or the second contact (4a) interacts electrically and mechanically with the fourth contact (4b), for closing and opening the contact arrangement. At least one mechanical coupling (2) is provided for transmitting an actuation force to the second contact group (3b, 4b) and thereby moving the second contact group (3b, 4b). The at least one mechanical coupling (2) is adapted to move the third and the fourth contact (3b, 4b) in such a way that their speeds differ along at least a portion of a travel path of the third contact (3b) or along at least a portion of a travel path of the fourth contact (4b).