Abstract:
An electrical switching device (1) comprises: a longitudinal axis (z), a contact arrangement with a first contact (3) and a second contact (4), an insulating element (8a) enclosing at least partly the first contact (3), and a first auxiliary insulating element (8b) enclosing at least partly the second contact (4). An arcing volume (5) is defined between the first contact (3) and the second contact (4) and delimited by inner walls of the insulating element (8a) and of the first auxiliary insulating element (8b) and is connected to a pressurized gas volume (6) via a first channel (7), in such a way that an insulating fluid can travel between both volumes (5, 6) through the first channel (7). The first channel (7) has a first section (7a) opening out in the arcing volume (5) and a second section (7b) opening out in the pressurized gas volume (6), the first section (7a) being delimited by a front face (9b) of the first auxiliary insulating element (8b) and at least by a front face (9a) of the insulating element (8a). In the first auxiliary insulating element (8b) at least a first bypass channel (2) is provided, which opens up on one side in the second section (7b) of the first channel (7) and opens up on the other side in a first transitional area (11) between the front face (9b) of the first auxiliary insulating element (8b) and an inner wall (9c) of the first auxiliary insulating element (8b).
Abstract:
Conductor arrangement (100) for reducing very fast transients in high voltage applications comprising a conductor element (10, 70) having a main conducting orientation x, a conductive annular shell element (20) coaxial to the conductor element (10, 70), thus forming an annular cavity (40) around the conductor element (10, 70). The annular shell element (20) in the main conducting orientation x comprises a first end portion (22) and a second end portion (24), wherein the first end portion (22) is conductively connected to the conductor element (10, 70). The second end portion (24) comprises an annular collar (26); wherein the collar (26) is substantially coaxial to the conductor element (10, 70), thus together with the conductor element (10, 70) forming a coaxial capacitor (30) which has a solid material filling (34). The capacitor (30) comprises a surge arrester (50; 51, 52; 34) which may serve as an energy conversion portion (50).
Abstract:
Die Erfindung betrifft ein elektrisches Schaltgerät (1), insbesondere einen Hochspannungsschalter (1), und ein Verfahren zur verbesserten Schaltgaskühlung. Erfindungsgemäss wird im Auspuffbereich (7, 8) Kaltgas (111) zwischengespeichert und eine erste Teilgasströmung (11a) an dem zwischengespeicherten Kaltgas (111) vorbeigeleitet und in die Schaltkammer (2) abgeströmt, wobei mit Hilfe einer zweiten Teilgasströmung (11b) das zwischengespeicherte Kaltgas (111) aus dem Auspuffbereich (7, 8) verdrängt und vor dem Abströmen in das Schaltkammergehäuse (3) mit der ersten Teilgasströmung (11a) durchmischt wird. Ausführungsbeispiele betreffen u. a.: die Ausgestaltung des Zwischenspeichervolumens (7, 8) für das Kaltgas (111) sowie Hilfsmittel (9) zur Vorkühlung des heissen Schaltgases (11, 110; 11a, 11b, 11c). Vorteile sind u. a.: verbesserte Schaltgaskühlung, erhöhte Schaltleistung und/oder kompaktere Schalterbauweise.