Abstract:
The invention relates to a vacuum switch, especially a vacuum circuit breaker, for medium and high voltages, comprising a mobile switch unit arranged inside a vacuum switch compartment (1) and provided with mutually mobile elements including a contact tappet (17), an insulator (18), and a driving or switching rod (11) introduced into the vacuum switch compartment (1) by means of metal bellows. Said vacuum switch also comprises a fixed contact inserted into the housing of the vacuum switch compartment (1). The upper end of the insulator (18) is fixed to the contact tappet (17), and the lower end of the insulator (18) is fixed to the driving or switching rod (11). The contact tappet (17) is connected to a conductor (8) by a flexible, electroconductive connection (20), said conductor being electroconductively connected to at least one laterally arranged output contact (6). The aim of the invention is to enable a simplified, more economical and improved design of a flexible conductive connection to the output contact. To this end, the inner cross-sectional surface of the vacuum switch compartment (1) is covered, at the level of the at least one output contact (6), around the contact tappet (17), by film-type or plate-type electroconductive covering elements (26) which are arranged over each other in layers and at least partially cover each other.
Abstract:
The invention relates to a vacuum interrupter for circuit-breakers. The aim of the invention is to reduce the contact pressure force. To this end, the contacts (1, 2) of the vacuum interrupter are configured in such a way that an inner contact area (9) is situated inside an outer, arc-extinguishing contact area (7). Said inner contact area consists of several spring contact studs (11) that are situated adjacently to each other on a divided circle.
Abstract:
Um eine Vorrichtung zur Übertragung von Kräften auf einem Bewegkontaktanschlussbolzen (7) eines Kontaktsystems aus einem Bewegkontakt und einem weiteren Kontakt eines Schaltgerätes (1), mit einem zumindest teilweise flexiblen, zum elektrischen Verbinden des Bewegkontaktanschlussbolzens (7) mit einem Anschluss des Schaltgerätes (1) vorgesehenen Leiterelement (12) mit mindestens einem ersten Schenkel (14) und einem zweiten Schenkel (16), die zum gegenseitigen Stromfluss angeordnet sind, um so eine elektromagnetische Kraft zu erzeugen, wobei der erste Schenkel (14) ortsfest in einem Gehäuse (5) des Schaltgerätes (1) angeordnet ist, weiterzubilden, welche über einen einfachen Aufbau verfügt, wird vorgeschlagen, dass der zweite Schenkel (16) an einer fest mit dem Bewegkontaktanschlussbolzen (7) verbundenen Stützplatte (17) derart entlanggeführt und gehalten ist, dass eine in einem Kurzschluss auftretende elektromagnetische kraft zwischen dem ersten Schenkel (14) und dem zweiten Schenkel (16) zum Vergrößern einer von einer Kontaktdruckfeder (9) ausgeübten Kontaktdruckkraft in dem Bewegkontaktanschlussbolzen (7) einleitbar ist, wobei die Stützplatte (15) in dem Gehäuse (5) des Schaltgerätes (1) gleitend beweglich geführt ist.
Abstract:
Bei einem Vakuumschalter insbesondere Vakuumleistungsschalter, für Mittel- und Hochspannung mit einer innerhalb einer Vakuumschalt kammer (1) angeordneten beweglichen Schalteinheit, die miteinander beweglich einen Kontaktstößel (17), einen Isolator (18) und eine in die Vakuumschaltkammer (1) durch einen Faltenbalg (10) aus Metall eingeführte Antriebs- oder Schaltstange (11) umfasst, und einem in das Gehäuse der Vakuumschalt kammer (1) eingefügten Festkontakt (16), wobei das obere Ende des Isolators (18) mit dem Kontaktstößel (17) und das untere Ende des Isolators (18) mit der Antriebs- oder Schaltstange (11) fest verbunden ist, und wobei der Kontaktstößel (17) eine flexible, elektrisch leitende Verbindung (20) mit einem Leiter (8) aufweist, der in stromleitender Verbindung mit mindestens einem seitlich angeordneten Abgangskontakt (6) steht, soll eine Lösung geschaffen werden, die eine verbesserte Schalt- und Kontaktflächenausgestaltung ermöglicht. Dies wird dadurch erreicht, dass der Festkontakt (16) und der Kontaktstößel (17) jeweils ein Schaltkontaktstück (14a, 14b) aufweisen, das eine äußere Schalt- und Kontaktfläche (29) und eine relativ dazu bewegliche innere Schalt- und Kontaktfläche (30) aufweist.
Abstract:
An improved vacuum interrupter (1000) is disclosed. The vacuum interrupter (1000) includes end covers (1005) having a curved or looped portion (1022), which serves to connect a coil segment (1015) of the vacuum interrupter (1000) to a ceramic envelope (1010) of the vacuum interrupter (1000), and thereby help maintain a vacuum seal for the interrupter. The curved portion (1022) acts as a spring when the vacuum interrupter (1000) is exposed to heat, thereby absorbing any expansion or contraction in the length of the vacuum interrupter due to the heating or cooling. The curved portion (1022) also protects an end of the ceramic envelope (1010) from any build-up of metallic arcing products and eliminates the need for elaborate fixturing during assembly. Additionally, a guide (1045) may be affixed to the end cover (1005), the guide (1045) having ears (1302) which ride in a slot (1050) in a moving rod (1035) of the vacuum interrupter (1000), to thereby prevent a twisting of a bellows (1030) of the interrupter during a brazing process. Thus, no elaborate fixturing is necessary to prevent this twisting.
Abstract:
The invention relates to a contact arrangement for a vacuum switch tube for low-voltage power switches. The aim of the invention is to reduce the contact force required to control short circuit currents. To this end, a twin-contact contact arrangement is used wherein every contact comprises a plurality of separate individual contacts having a defined spring rate. At least one of the contact bodies (4) is configured as a two-layer spiral contact with a lower layer consisting of a highly elastic material and an upper layer (7) consisting of a highly electroconductive material. A contact coat (9) consisting of a contact material is provided on the upper layer in the outer zone of every contact arm (10).
Abstract:
A vacuum circuit breaker comprises a vacuum interrupter operable between a closed state and an open state, and an actuator. The actuator comprises a piezoelectric driving element that is expandable and contractable along an expansion axis in response to an electrical input signal. The actuator further comprises a mechanical amplifying structure extendable along an actuation axis and being mechanically coupled to the piezoelectric driver such that expansion or contraction of said piezoelectric driving element causes the amplifying structure to extend or retract along the actuation axis. The mechanical amplifying structure is coupled to the vacuum interrupter for operating the vacuum interrupter between said closed and open states.
Abstract:
The invention relates to a vacuum switch, especially a vacuum circuit breaker, for medium and high voltages, comprising a mobile switch unit arranged inside a vacuum switch compartment (1) and provided with mutually mobile elements including a contact tappet (17), an insulator (18), and a driving or switching rod (11) introduced into the vacuum switch compartment (1) by means of metal bellows. Said vacuum switch also comprises a fixed contact inserted into the housing of the vacuum switch compartment (1). The upper end of the insulator (18) is fixed to the contact tappet (17), and the lower end of the insulator (18) is fixed to the driving or switching rod (11). The contact tappet (17) is connected to a conductor (8) by a flexible, electroconductive connection (20), said conductor being electroconductively connected to at least one laterally arranged output contact (6). The aim of the invention is to enable an improved embodiment of the switching and contact surfaces. To this end, the fixed contact (16) and the contact tappet (17) respectively comprise a switching contact part (14a, 14b) comprising an outer switching and contact surface (29) and an inner switching and contact surface (30) that can be moved in relation to the outer surface.