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:
The electrical switching device (1) has a longitudinal axis (z) and comprises at least one contact arrangement (4a, 4b), wherein the contact arrangement (4a, 4b) comprises a first contact (4a, 3a) and a mating second contact (4b, 3b), wherein the first contact comprises at least one contact finger (4a, 3a), wherein for closing and opening the electric switching device (1) at least one of the first contact and the mating second contact (3a, 3b; 4a, 4b) is movable parallel to the longitudinal axis (z) and cooperates with the other contact (3b, 3a; 4b, 4a), characterized in that the electrical switching device further comprises a deflector (6; 7a; 11, 14) elastically deflecting the at least one contact finger (3a, 4a) in a radial direction away from the axis (z) prior to or while closing the electrical switching device ( 1 ).
Abstract:
The electrical switching device (1) can comprise at least a nominal contact arrangement, wherein the nominal contact arrangement comprises at least a first nominal contact comprising a plurality of nominal contact fingers (3a) forming a finger cage concentric with respect to a longitudinal axis (z), and at least a mating second nominal contact (3b). It can further comprise at least an arcing contact arrangement, wherein the arcing contact arrangement comprises a first arcing contact (4a) and a mating second arcing contact (4b), wherein the first arcing contact comprises at least an arcing contact finger (4a).The arcing contact finger (4a) comprises at its free end a first impact area (7a) in which a first contacting to the second arcing contact (4b) occurs when closing the electrical switching device (1). The first impact area (7a) is formed by a first planar surface arranged at an inclination angle (α) larger than zero degrees with respect to the longitudinal axis (z).
Abstract:
Control of the encryption of data for storage with respect to removable data storage cartridges having a recording media and having cartridge memory with at least a portion lockable to read-only, employs the steps of inspecting the read-only portion of the cartridge memory of the removable data storage cartridge for an "Encrypt-Only" flag. If the "Encrypt-Only" flag is present, writes to the recording media of the removable data storage cartridge are limited to data in an encrypted format, if any; and, else, writes to the recording media of the removable data storage cartridge are allowed for data in any of encrypted and unencrypted formats.
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:
The invention deals with a method and device for controlling the ignition of electric arc in the intercontact break of a disconnector during the operation of opening and closing the disconnector used in gas-insulated switchgear. The invention is characterized by the control of the supply of additional pulses of electromagnetic radiation energy to the intercontact break of the disconnector depending on instantaneous voltage values uS(t) measured on the incoming side of the disconnector or depending on instantaneous voltage values uS(t) on the incoming side of the disconnector and instantaneous voltage values uL(t) on the load side of the disconnector, with defined voltage threshold values (U1, U2) and preset time boundary values (T1, T3) during opening the disconnector or (T2, T4) during closing the disconnector, while the preset time values (T1, T3) include time moments in which the supply of energy pulses to the intercontact break is stopped, and the preset time values (T2, T4) include time moments in which supply of energy pulses to the intercontact break starts.
Abstract:
A gas-insulated type circuit breaker (1) comprises a housing (4) defining a gas volume for a dielectric insulation gas; a first arcing contact member (10) and a second arcing contact member (20), wherein the first arcing contact member (10) and the second arcing contact member (20) are movable relative to each other along an axis (2); a first nominal contact member (40) and a second nominal contact member (60), wherein the first nominal contact member (40) and the second nominal contact member (60) are movable relative to each other along the axis (2); and a first nominal contact shielding arrangement (50) comprising an inner shield member (52) and an outer shield member (54), wherein the inner shield member (52) and the outer shield member (54) are arranged coaxially about the axis (2). The first nominal contact member (40) is arranged co-axially between the inner shield member (52) and the outer shield member (54), and is movable relative to the inner shield member (52) and to the outer shield member (54).
Abstract:
Die Erfindung betrifft ein elektrisches Kontakt System (1)für ein Schaltgerät mit einem Gegenkontakt (2) und einem zweiten Kontakt (3). Erfindungsgemäss weist der zweite Kontakt (3) eine Kontakttulpe (3a) auf, an deren Aussenflache (301) ein Stromübergang (13) zu einem ringförmigen Teil des Gegenkontakts (2c) stattfindet. Ausführungsbeispiele betreffen u. a.: zusätzlicher Stromübergang (14) an einer innenliegenden Kontaktierungsflache (300) der Kontakttulpe (3a) zu einem stiftförmigen Teil des Gegenkontakts (2c); Gegenkontakt (2) mit Gegenkontakttulpe (2a) zum Eingreifen in die Kontakttulpe (3a); und Massnahmen zur Verbesserung der Kontaktkräfte.Vorteile sind u. a.: Tulpe in Tulpe - Design mit grosser Kontaktfläche (300, 301), grosser Kontaktkraft, reduzierter Anzahl Kontaktfinger (30), reduzierter Anzahl Gegenkontaktfinger (20) und verbesserter Justiertoleranz; Kontakttulpe (3a) wirkt als Lichtbogenkontakt (31) und zugleich als Kurzzeitstromkontakt (301, 300) .
Abstract:
The electrical switching device (1) can comprise at least a nominal contact arrangement, wherein the nominal contact arrangement comprises at least a first nominal contact comprising a plurality of nominal contact fingers (3a) forming a finger cage concentric with respect to a longitudinal axis (z), and at least a mating second nominal contact (3b). It can further comprise at least an arcing contact arrangement, wherein the arcing contact arrangement comprises a first arcing contact (4a) and a mating second arcing contact (4b), wherein the first arcing contact comprises at least an arcing contact finger (4a).The arcing contact finger (4a) comprises at its free end a first impact area (7a) in which a first contacting to the second arcing contact (4b) occurs when closing the electrical switching device (1). The first impact area (7a) is formed by a first planar surface arranged at an inclination angle (α) larger than zero degrees with respect to the longitudinal axis (z).
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).