512results about "Earthing switches" patented technology

By molding a plurality of vacuum valves (7), (13) having differing functions together with an input member (3) and an output member (21) en bloc in a resin layer (23) to form a switch gear (1), the present invention seeks to achieve dielectric strength without resorting to the use of SF6 gas, while rendering the whole device more compact and reducing both the number of parts and the man hours required for molding.

For simple structure and easy manufacture, module tanks have a common standardized size so that the same tank is applicable even when the components to be accommodated are changed. The basic structure of the module is arranged so that all of the interrupter, the disconnector with the grounding switch, the bus bar bushing, the cable connecting bushing and the gas section spacer can be mounted, and necessary main circuit components depending upon the circuit to be used are left behind and unnecessary main circuit components are short-circuited by a short-circuiting conductor, and that the tank opening portions are either left un-worked during manufacture or closed by a cover. The bus bar bushings and the cable connecting bushings are attached at the rear face of the tank and the gas section spacer is disposed on the top or bottom face of the tank. A lightning arrester in lieu of interrupter may be accommodated within an insulating cylinder housing the main circuit of the interrupter.

A vacuum insulated switchgear comprising a vacuum container accommodating at least a pair of movable contacts and a pair of fixed contacts, wherein the movable contacts are capable of taking three positions, the switchgear being a double-break three-position type switch having breaking and disconnecting functions.

A valley section is provided between a high-voltage arc contact and a high-voltage main contact. Because of the presence of the valley section, resistance between contacts is reduced while a moving arc contact makes contact with the high-voltage arc contact and then slides up to making contact with the high-voltage main contact.

The invention relates to a movable and static contact connection assembly and a high-voltage isolation grounding switch thereof. The movable and static contact connection assembly comprises a movable contact and a static contact which are inserted and matched correspondingly; the static contact comprises a static contact finger and a static arc contact which is arranged axially at the center of astatic contact seat; the static arc contact is provided with a cylindrical contact lever which extends axially and is integrated circumferentially; the center of the matched end part of the movable contact and the static contact finger is provided with a mounting hole extending axially; the mounting hole is internally provided with a hollow columnar movable arc contact which is inserted and matched with the contact lever of the static arc contact in switching on; and the static arc contact and the active arc contact are inserted, contacted and matched. The integral cylindrical structure is adopted for the static arc contact arranged on the movable and static contact connection assembly and the high-voltage isolation grounding switch static contact, also the movable contact is internally provided with a corresponding inserted and matched structure, the reduction of the strength of structure of the static arc contact caused by the splitting of the static contact finger for the opening on the static arc contact is avoided, and simultaneously the problem of in accurate excess of stroke after deformation is avoided caused by the easily-deformed pin finger on the static arc contact.

A switching device for medium, high, or extremely high voltage, wherein at least one voltaged component of the switching device is enclosed in an enclosure and the enclosure is filled with a filling medium. The filling medium includes at least one compound from the group of fluorinated ketones, or consists of the same.

The invention discloses a solid insulated totally-enclosed ring main unit, which comprises at least a line of leading-in unit and at least a line of leading-out unit, and each line of switch comprises a 3-phase high-voltage vacuum switch unit. The high-voltage vacuum switch consists of a housing fixed inside a box body, and a main switch and an isolator arranged in the housing, wherein, the housing is made of epoxy resin, and a copper joint pin of the main switch and the outside of a busbar connected with the copper joint pin are coated with silicon rubber layers. The ring main unit of the invention adopts a totally enclosed design, which causes the ring main unit to have a smaller volume and compact structure, and to be safe and reliable; the probability of leakage and discharge is low, thus improving the insulation class, and the ring main unit has obvious effect on saving energy and materials; air, moisture, dust and hot and cool air sources are isolated, which effectively retards the corrosion of a power source body, stabilizes the output of source voltage, decreases the times of the device maintenance, reduces expense cost and prolongs the service life of the ring main unit.

A vacuum insulated switchgear comprising a case having a switch section, a bus-bar section and a cable section, each being partitioned by an earthed metal plate, a vacuum double break three point switch disposed in the switch section and having breaking and disconnecting function, an operator, a bus-bar disposed in the bus-bar section of the case, and a cable connection terminal connected to a cable in the cable section.

A vacuum insulated switchgear comprising a case having a switch section, a bus-bar section and a cable section, each being partitioned by an earthed metal plate, a vacuum double break three point switch disposed in the switch section and having breaking and disconnecting function, an operator, a bus-bar disposed in the bus-bar section of the case, and a cable connection terminal connected to a cable in the cable section.

An electric device, in particular for medium or high voltage electric substations, able to perform the functions of circuit-breaking, isolating and earthing is described. The device comprises: a casing; at least one circuit-breaker; at least one line isolator having a fixed isolator contact; a line isolator actuating shaft for actuating the at least one line isolator; at least one earthing isolator; a circuit-breaker actuating shaft for actuating at least one circuit-breaker; and a lever connected to a conductor rod co-operating with movable circuit-breaker contacts, said conductor rod further engaging with said fixed isolator contact in a closing position, wherein: the device further comprises a resilient member co-operating with said conductor rod in order to transfer correct pressing loads to said movable contacts. According to the invention, said circuit-breaker actuating shaft and said line isolator actuating shaft are coaxial. Profitably, the casing is filled with nitrogen or sulphur hexafluoride.

Operating shaft 4 allows disconnecting switch-side and earthing switch-side moving contacts 7a and 7b to linearly reciprocate with the rotation of operating shaft 4. Operating shaft 4 has two-hole lever 5 allow an arc motion. Each one end of two curved links 6a and 6b is connected to two-hole lever 5 and the other end of two curved links 6a and 6b is respectively connected to the disconnecting switch-side moving contact or the earthing switch-side moving contact. When the two connecting points are axisymmetric with respect to the bisector, both the disconnecting switch and the earthing switch are in an open state; when two-hole lever 5 moves at a predetermined angle to the disconnecting switch-side, the disconnecting switch is in a closed state; and when two-hole lever 5 moves at a predetermined angle to the earthing switch-side, the earthing switch is in a closed state.

A vacuum circuit interrupter includes a line conductor, a vacuum interrupter, a load conductor, a ground conductor and an operating mechanism. The vacuum interrupter includes a fixed conductor and a vacuum envelope containing a fixed contact and a movable contact movable between a closed circuit position in electrical connection with the fixed contact and an open circuit position spaced apart from the fixed contact. The fixed conductor is outside of the vacuum envelope and is electrically connected to the fixed contact. The load conductor is electrically connected to the movable contact. The operating mechanism is structured to: open and close the fixed and movable contacts, and move the vacuum interrupter and the fixed conductor thereof between a first position wherein the fixed conductor is electrically connected to the line conductor, and a second position wherein the fixed conductor is electrically connected to the ground conductor.

A gas-insulated switchgear includes a tank filled with an electrically insulating gas, first and second conductors disposed within the tank, a disconnector for disconnecting the first conductor and the second conductor from each other, and a grounding switch for grounding the first conductor when the disconnector is in an open position. The disconnector includes a first and second fixed electrode disposed on the first and second conductors, respectively, a bridging movable electrode that is always maintained in contact with the first electrode and that is slidably movable for contacting with and separating from the second fixed electrode to connect and disconnect the first and second fixed electrodes, and an operating mechanism for opening and closing operation of the movable electrode. The grounding switch includes the bridging movable electrode which is in contact with the first contact, and a third fixed grounding electrode disposed to the tank capable of contacting with the movable electrode when the movable electrode is separated from the second electrode. The operating mechanism is provided with an electrically insulating operating rod extending through the first fixed electrode in the direction of movement of the movable electrode.

A switching device for electric power distribution, includes a breaker that is electrically connectable to a conductor, and an electrically conductive housing to which the breaker is mounted. The device provides a current path between the breaker and the conductor. The housing houses at least one guiding member for operating the breaker and a first part of the current path, the first part being electrically connected to the breaker. The device also includes a switch for electrically connecting the breaker to the conductor, the switch having a switch element movable to a first position where the switch element is connected to the first part and the conductor, movable to a second position where the switch element is disconnected from the conductor and connected to the first part and a grounded element, and movable to a third position where the switch element is disconnected from the conductor and the grounded element.

The device (10) has a driving disk (66) driven in rotation about an axis by an electric motor (14). A driven disk (68) rotates about the axis. A switching unit switches between a drive mode to drive a sleeve and a locking mode to lock an angular position of the sleeve. The unit has a rotary member carrying a cylindrical roller (58) that is simultaneously engaged in slots formed in peripheral edges of the disks due to rotation of member to induce commutation in the drive mode and disengaged from one of the slots to induce commutation in the locking mode.

The three-position, gas-insulated, metal-clad electrical switch inside a metal casing comprises first and second break contacts, a fixed grounding contact, and a switching element that is movable in an axial direction to interconnect said break contacts. The first and second break contacts and said fixed grounding contact are superposed in said axial direction, and the switching element is moved by means of a drive rod which passes through the fixed grounding contact, thereby enabling said switching element to occupy each of the three switching positions including a grounding position in which it connects the first break contact to the fixed grounding contact.

An electric device, in particular for medium or high voltage electric substations, able to perform the functions of circuit-breaking, isolating and earthing is described. The device comprises: a casing; at least one circuit-breaker; at least one line isolator having a fixed isolator contact; a line isolator actuating shaft for actuating the at least one line isolator; at least one earthing isolator; a circuit-breaker actuating shaft for actuating at least one circuit-breaker; and a lever connected to a conductor rod co-operating with movable circuit-breaker contacts, said conductor rod further engaging with said fixed isolator contact in a closing position, wherein: the device further comprises a resilient member co-operating with said conductor rod in order to transfer correct pressing loads to said movable contacts. According to the invention, said circuit-breaker actuating shaft and said line isolator actuating shaft are coaxial. Profitably, the casing is filled with nitrogen or sulphur hexafluoride.

This invention relates to the control of a switch apparatus having two interrupters, such as a busbar disconnector and a grounding disconnector.The invention provides:a rotary control shaft arranged away from, and at right angles to, the planes of straight line motion of the movable contacts;at least one disk cam fastened to the control shaft and having two distinct internal cam grooves; andtwo pairs of levers hinged to each other, with one of the levers of a given pair having one end hinged at a fixed point while its other end is hinged to the other lever of the same given pair, which is itself hinged to one of the movable contacts, a spigot being located between the two ends of each of the levers that has one end hinged at a fixed point, the spigot being engaged in one of the cam grooves so as to constitute a cam follower.The mechanism of the invention enables there to be an additional actuating ratio between the disk cam or cams and each associated movable contact.

The present invention provides a switch operating device capable of easily achieving three-point control even in the case where the disconnector and grounding switch have different operating angle or operating amount. The switch operating device has: an electric motor (5) capable of being rotated in both positive and negative directions; a drive shaft (6) rotated by the electric motor (5); a drive-side intermittent gear (8) rotated by the drive shaft (6); a driven-side intermittent gear (10) rotated by the drive-side intermittent gear (8); a main shaft (11) that is fixed to the driven-side intermittent gear (10) to drive the contacts of the switch; a disconnector lock cam (19a) and a grounding switch lock cam (19b) fixed to the main shaft (11) to be rotated; and a disconnector lock pin (52a) and a grounding switch lock pin (52b) that are capable of being engaged with and released from the disconnector lock cam (19a) and the grounding switch lock cam (19b) and capable of inhibiting predetermined range of rotation of the main shaft (11) when being engaged.

A main circuit switching unit and an isolator are accommodated in a vacuum container. A first conductor and a main circuit conductor are arranged to extend in and out of the vacuum container. A movable electrode of the main circuit switching unit is connected to the first conductor through a first flexible conductor, and a movable electrode of the isolator is connected to the main circuit conductor through a second flexible conductor. A shield is arranged around the first conductor and the main circuit conductor. Another shield is arranged around a connecting portion between the first flexible conductor and the movable electrode of the main circuit switching unit. A still another shield is arranged around the isolator. A further another shield is arranged around the second flexible conductor. These shields are secured to the vacuum container through insulating spacers. This arrangement instantly eliminates a dielectric breakdown phenomenon that occurs at electric field concentrated regions by the shields to prevent a dielectric breakdown caused by particulate foreign matters and thereby improve an insulation reliability of the devices.

The invention discloses a breaker actuator with three switch positions which is equipped with two crank inlet, capable of switching the breaker manually from the closed position to the open position, or from the open position to the earth position by one crank. Each inlet faced to a different switch unit capable of switching the breaker from one position to another when the crank actuates the switch unit is closed by a rotating protective cover fixed by an detachable rotating interlocking section with tracks which limits a special locking logic for preventing special manual switch order of breaker.

A gas-insulated switchgear device comprising a first casing housing: at least a first terminal for input / output connection; a disconnector unit comprising at least a first fixed contact operatively coupled to said first terminal and a corresponding first movable contact which can be electrically connected / disconnected with said first fixed contact, during operation of the disconnector unit; a circuit breaker unit electrically connected to said disconnector unit and comprising at least a couple of interruption contacts which can be actuated, during operation of said circuit breaker unit, between a circuit breaker closed position where they are electrically coupled and a circuit breaker open position where they are electrically separated; actuating means for operating said disconnector unit and said circuit breaker unit; a second casing operatively coupled with said actuating means, which houses said interruption contacts and on the outer surface of which at least said first movable contact is mounted; characterized in that said second casing is pivotally mounted inside said first casing so as to rotate said first movable contact during operation of said disconnector unit, said couple of interruption contacts being operatively coupled to said actuating means so as to be kept electrically coupled in said circuit breaker closed position and substantially still relative to each other during rotation of said second casing.

A switching installation (5) having a circuit breaker (12), which is connected to a cable connection (33), and optionally a disconnector (14) for making or breaking a conductive connection between the cable connection (33) and a rail system (15), and an electrically insulating barrier (10). The electrically insulating barrier (10) surrounds at least the parts which are under electric voltage in operation from the circuit breaker (12) to the rail system (15), including a branch (18) leading to a rail (15) of the rail system, separately for each phase of the switching installation (5). Furthermore, inside the electrically insulating barrier (10) the switching installation may be provided with field-control means and / or voltage-sealing means (22, 25, 37).

A valley section is provided between a high-voltage arc contact and a high-voltage main contact. Because of the presence of the valley section, resistance between contacts is reduced while a moving arc contact makes contact with the high-voltage arc contact and then slides up to making contact with the high-voltage main contact.

A switchgear includes an earthing and disconnecting switch which linearly moves and is switchable to a disconnecting and an earthing positions, a vacuum valve which performs closing and breaking of a current in a vacuum container producing vacuum inside, and a solid insulator with which the earthing and disconnecting switch and the vacuum valve are covered, therein the earthing and disconnecting switch and the vacuum valve are electrically connected, and closing and breaking of a current is performed in the vacuum valve.