Abstract:
PROBLEM TO BE SOLVED: To provide a puffer circuit breaker with a valve for releasing overpressure in a puffer volume. SOLUTION: The circuit breaker includes a puffer volume 9, and at least one overpressure valve 16 for discharging gas from the puffer volume 9 if the pressure therein exceeds a given threshold. The overpressure valve 16 comprises a piston 17 and a spring 19 as well as a cavity 18 in a stationary support body of a movable contact assembly 2. The overpressure valve 16 is designed into compact and simple structure and has low hysteresis and large cross-section. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To enable to increase switching speed and/or reduce energy of required driving operation. SOLUTION: A circuit breaker comprises a puffer volume 9 and at least one filling valve 16 structured to allow a flow of gas into the puffer volume 9 upon expansion of the same. A closing member 18 is biased in a direction against the flow of gas emitting from the puffer volume 9 such that the filling valve 16 remains open while the pressure accumulated within the puffer volume 9 remains below a given threshold. This allows to keep the pressure in the puffer volume 9 low under low current switching conditions, thereby decreasing the tendency for supersonic flow in the insulating nozzle. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
Conmutador de alta tensión con una carcasa (10) rellena de gas de aislamiento, que delimita una cámaracolectora (11) para el gas de aislamiento, con una disposición de contacto retenida en la carcasa con dos piezas deconmutación (20, 30) desplazables a lo largo de un eje (A) relativamente entre sí, cuya primera pieza deconmutación (20) móvil por un accionamiento (D) del conmutador presenta en disposición coaxial un contacto dearco voltaico hueco (21) y un contacto de corriente nominal hueco (22), que rodea el contacto de arco voltaico hueco(21), con una primera salida de gas (21 b) conformada en la pared de un soporte de contacto (21a) en forma de tubodel contacto de arco voltaico hueco (21), con una cámara de escape (43) configurada de forma anular, que estáguiada alrededor de una sección, que contiene la primera salida de gas (21b), del soporte de contacto (21a) enforma de tubo y se comunica a través de un orificio de escape (47) guiado radialmente hacia fuera con la cámaracolectora (11), con un dispositivo de compresión de cilindro y pistón (50) que puede ser activado por elaccionamiento (D) con una cámara de compresión (52) configurada en forma de anillo para el alojamiento de gas deextinción, y con un volumen intermedio (44) dispuesto entre la cámara de compresión (52) y la cámara de escape(43), que está separado de la cámara de escape (43) por medio de una pared intermedia (42), se comunica a travésde un orificio de aspiración (48) guiado radialmente hacia fuera con la cámara colectora (11) y está conectado con lacámara de compresión (52) durante la conexión a través de una válvula de retención (58), caracterizado porque lapared intermedia (42) forma parte de un cuerpo fundido de metal hueco (40) que delimita la cámara de escape (43) yel volumen intermedio (44) radialmente hacia fuera y que contiene el orificio de escape (47) y el orificio de aspiración(48), porque el pistón (51) del dispositivo de compresión de cilindro y pistón (50) está fijado en un lado frontal delcuerpo fundido de metal (40) y delimita axialmente el volumen intermedio (44), y porque en la posición de conexióndel conmutador, el contenido espacial del volumen intermedio (44), determinado por la distancia axial de la paredintermedia (42) con respecto al pistón (51) es mayor que el contenido espacial de la cámara de compresión (52).
Abstract:
The invention relates to an electrical switching device for medium or high voltage circuits having at least a nominal contact arrangement, wherein the nominal contact arrangement comprises at least a first nominal contact comprising a plurality of contact fingers forming a finger cage concentric with respect to a longitudinal axis, wherein the contact fingers are separated from one another by empty slots extending up to a free end of the contact fingers . The empty slots comprise first and second empty slots, wherein the second empty slots are shorter than the first empty slots, and wherein the contact fingers are grouped in groups, with the contact fingers of each group being separated by second empty slots and the contact fingers of adjacent groups being separated by first empty slots.
Abstract:
The invention relates to an electrical switching device for medium or high voltage circuits having at least a nominal contact arrangement, wherein the nominal contact arrangement comprises at least a first nominal contact comprising a plurality of contact fingers forming a finger cage concentric with respect to a longitudinal axis, wherein the contact fingers are separated from one another by empty slots extending up to a free end of the contact fingers . The empty slots comprise first and second empty slots, wherein the second empty slots are shorter than the first empty slots, and wherein the contact fingers are grouped in groups, with the contact fingers of each group being separated by second empty slots and the contact fingers of adjacent groups being separated by first empty slots.
Abstract:
The switch has an intermediate wall (42) designed as a part of a hollow metal casting body (40) that contains exhaust and suction openings (47, 48). An intermediate volume (44) is arranged between compression and exhaust regions (52, 43) and separated from the exhaust region by the wall. A piston-cylinder-compression device (50) has a piston (51) fastened at a front side of the body, where the piston axially limits the volume. A capacity of the volume defined by axial distance of the volume from the piston is larger than capacity of the compression region in a switch-on position of the switch.
Abstract:
A circuit breaker comprises a puffer volume (9) and at least one filling valve (16) adapted to allow a flow of gas into the puffer volume (9) upon expansion of the same. The closing member (18) is biased in a direction against the flow of gas exiting from the puffer volume (9) such that the filling valve (16) remains open while the pressure build-up within the puffer volume (9) remains below a given threshold. This allows to keep the pressure in the puffer volume (9) low under low current switching conditions, thereby decreasing the tendency for supersonic flow in the insulating nozzle. It also allows to increase the switching speed and/or to decrease the required drive operating energy.