EP4481784B1 - Parallel schaltender lastschalter und mittelspannungsschaltanlage damit - Google Patents

Parallel schaltender lastschalter und mittelspannungsschaltanlage damit

Info

Publication number
EP4481784B1
EP4481784B1 EP24183100.7A EP24183100A EP4481784B1 EP 4481784 B1 EP4481784 B1 EP 4481784B1 EP 24183100 A EP24183100 A EP 24183100A EP 4481784 B1 EP4481784 B1 EP 4481784B1
Authority
EP
European Patent Office
Prior art keywords
contact
moving
cam
breaking load
load switch
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP24183100.7A
Other languages
English (en)
French (fr)
Other versions
EP4481784A1 (de
Inventor
Lingyi Shao
Wei Shen
Ping Zhou
Taishan WANG
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Eaton Electrical Ltd
Original Assignee
Eaton Electrical Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Eaton Electrical Ltd filed Critical Eaton Electrical Ltd
Publication of EP4481784A1 publication Critical patent/EP4481784A1/de
Application granted granted Critical
Publication of EP4481784B1 publication Critical patent/EP4481784B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
    • H01H31/003—Earthing switches
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66—Vacuum switches
    • H01H33/664—Contacts; Arc-extinguishing means, e.g. arcing rings
    • H01H33/6647—Contacts; Arc-extinguishing means, e.g. arcing rings having fixed middle contact and two movable contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66—Vacuum switches
    • H01H33/662—Housings or protective screens
    • H01H33/66261—Specific screen details, e.g. mounting, materials, multiple screens or specific electrical field considerations
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66—Vacuum switches
    • H01H33/666—Operating arrangements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66—Vacuum switches
    • H01H33/666—Operating arrangements
    • H01H33/6661—Combination with other type of switch, e.g. for load break switches
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
    • H01H3/42—Driving mechanisms, i.e. for transmitting driving force to the contacts using cam or eccentric
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
    • H01H31/26—Air-break switches for high tension without arc-extinguishing or arc-preventing means with movable contact that remains electrically connected to one line in open position of switch
    • H01H31/28—Air-break switches for high tension without arc-extinguishing or arc-preventing means with movable contact that remains electrically connected to one line in open position of switch with angularly-movable contact

Definitions

  • a medium-voltage switchgear according to present disclosure is particularly suitable for being connected into a medium-voltage circuit as a load breaking switch. Therefore, the medium-voltage switchgear is used to provide a breaking function and a circuit cutoff function at a specified circuit state (a nominal or overload state), and particularly to make a load-side portion of the circuit to be grounded.
  • a specified circuit state a nominal or overload state
  • the medium-voltage switchgear belongs to a multi-phase (e.g. three-phase) type, and includes a plurality of (e.g. three) electrodes.
  • the medium-voltage switchgear includes a shell C preferably made of an insulation material, and the insulation shell C beneficially defines an internal space capable of accommodating the electrodes.
  • the insulation shell C has an elongated shape (for example, generally a cuboid shape) extending along a main longitudinal axis.
  • the plurality of electrodes are arranged side by side along a corresponding horizontal plane perpendicular to the main longitudinal axis of the medium-voltage switchgear.
  • the internal space of the medium-voltage switchgear is filled with pressurized dry air with low environment impact or another insulation gas (such as a mixture of oxygen, nitrogen, carbon dioxide and/or fluorinated gases).
  • each electrode is electrically connected to a power line of the medium-voltage electrical system and is correspondingly broken by a parallel breaking load switch of present disclosure
  • the parallel breaking load switch 100 includes a stationary contact 1 which includes a first end 11 connected to the power line and a second end 12 opposite to the first end, the first end 11 is protruded out of the upper side of the insulation shell C and provided with a connector connected with an external power line, and the second end 12 is a flaky piece arranged inside the insulation shell C and protruded inwards.
  • the stationary contact 1 can be realized according to other solutions of a known type (for example, configured according to a plurality of blades including a plurality of fixed contact pieces), which is not described in detail here for brevity.
  • the parallel breaking load switch 100 further includes a moving contact 2 which is at least partially made of a conductive material, and can be electrically connected to the power line of the electrical system via a wiring terminal 25 located at the lower end.
  • the moving contact 2 can pivot reciprocally around a corresponding pivot axis A2 generally parallel to the main longitudinal axis of the medium-voltage switchgear.
  • the moving contact 2 can rotate in a first rotating direction away from the second end 12 of the stationary contact 1 and toward a grounding contact 3 or a second rotating direction, and the second rotating direction is opposite to the first rotating direction and is directed away from the grounding contact 3 and towards the second end 12 of the stationary contact 1.
  • the moving contact 2 can be formed by a pair of spaced contact pieces that are made of a conductive material. Each contact piece has an end that is hinged to the corresponding wiring terminal 25 at the pivot axis A2 and forms an opposite free end electrically coupled with the second end 12 of the stationary contact 1.
  • the medium-voltage switchgear includes an actuator 21, and the actuator 21 provides an appropriate actuating force to actuate the moving contact 2 ( Figure 1 ).
  • the actuator 21 here can be, for example, a mechanical actuator, an electric motor or a solenoid actuator.
  • one end of the contact piece of the moving contact 2 is provided with a spherical portion protruded outwards and operatively connected to the actuator 21 so as to be actuated to rotate around the pivot axis A2 among the closed position, the commutation position and the breaking position that are described in detail below, and the other end of the contact piece of the moving contact 2 is provided with an abutting portion 22 protruded outwards and capable of forming surface contact with the second end 12 of the stationary contact 1.
  • a contact area between the moving contact 2 and the stationary contact 1 can be increased obviously, thereby improving the passing capacity of the current, so that ablation and fusion welding are unlikely to occur when the breaking operation is performed by means of the moving contact 2.
  • the lower portion of the moving contact 2 is designed in a spherical surface, the friction or resistance of the pivot movement can be reduced, thereby meeting the requirements of temperature-rise test.
  • the moving contact 2 is also provided with a voltage equalizing ring 24 arranged adjacent to the spherical portion of the contact piece and used to equalize an electric field of electrical current flowing through the moving contact and a semicircular shielding cover 23 arranged adjacent to the abutting portion of the contact piece at an interval and used for preventing partial discharge, which are helpful to prevent the partial discharge during the normal operation of the medium-voltage electrical equipment and equalize the electric field inside the electrical equipment, and beneficial to improving the operation reliability and service life of the medium-voltage electrical equipment.
  • the medium-voltage electrical equipment can also include a grounding contact 3 located at one side of the moving contact 2 and capable of being electrically coupled to a grounding conductor, wherein the grounding contact 3 is designed generally in a U shape and includes a first end coupled to a grounding conductor, a second end opposite to the first end and a hollow portion located between the first end and the second end, and the second end is provided with a pair of contact feet 31 (referring to Figures 8-10 ) matched with the moving contact.
  • grounding contact 3 is designed in a U shape, those skilled in the art may know that two sides of an electrodynamic force are opposite in direction according to a right-hand rule, and most of electrodynamic force acting on the moving contact 3 can be counteracted, so that the grounding closing test is more stable and more reliable.
  • the parallel breaking load switch 100 also includes a vacuum interrupter 4, which is provided with a fixed switch contact and a movable switch contact, and the stationary contact 1 is electrically connected with the fixed switch contact.
  • the vacuum interrupter 4 as an example here includes the paired fixed switch contact and movable switch contact, wherein the fixed switch contact can be e ectrically connected with the first end 11 of the stationary contact 1, and the vacuum interrupter 4 is fixedly connected to the stationary contact 1.
  • the movable switch contact is driven by a moving end 42 extending from the shell of the vacuum interrupter 4. In this structure, no electrical current passes through the vacuum.
  • the vacuum interrupter 4 during the normal operation, that is, when the moving contact 2 and the stationary contact 1 are closed to enable the current to pass through a main circuit.
  • a movable portion of the moving contact 2 switches on a parallel bypass circuit including the vacuum interrupter before the electrical current in the main circuit is interrupted. The current is then interrupted in the main circuit, so that all the current then passes through the vacuum interrupter.
  • the movable portion of the main circuit disconnects the contact of the vacuum interrupter, and the current is cut off. Therefore, the generation of arcs in the main circuit is avoided, because at the moment of cutting off the current, the current only passes through the vacuum interrupter.
  • the structure of the vacuum interrupter 4 is known, for example, the vacuum interrupter can be a VI-8 vacuum interrupter commercially available from Eaton Company, and its structure is not described in detail here for the sake of brevity.
  • the medium-voltage electrical equipment does not use sulfur hexafluoride (SF6) gas as an insulation medium, but uses other gases with poorer insulation properties, higher requirements are imposed on the breaking distance of the arc interrupter and the kinematic connection between components of the load switch, and further description is made below in combination with the accompanying drawings.
  • SF6 sulfur hexafluoride
  • the parallel breaking load switch 100 includes a cam assembly, wherein the cam assembly is provided with a small contact 7 capable of rotating around a rotating axis A1, and the small contact 7 is provided with an electric conductor 6 capable of being electrically connected with the moving contact 2 so as to be electrically connected with the vacuum interrupter 4 in response to the rotation of the moving contact 2 around the pivot axis A2.
  • the cam assembly includes a cam frame 5, wherein the small contact 7 is pivotally connected to the cam frame 5 via, for example, a pivot point 52 of a pivot pin, the cam frame 5 is provided with a leading groove 51 for leading the moving end 42 of the movable switch contact to move linearly between an off position and an on position; the cam assembly also includes a cam 8 capable of being pivotally connected to the cam frame 5, the cam 8 is designed generally in a semilunar shape and also pivotally pivoted to the pivot point 52 by means of the pivot pin, the cam 8 is provided with an abutting pin 82 operatively connected with the small contact 7 and a guiding groove 81 sandwiching the moving end 42 of the movable switch contact; therefore, when the small contact 7 drives the cam 8 to pivot together around the rotating axis A1, the moving end 42 of the movable switch contact can move linearly between the off position and the on position via the leading groove 81 and the guiding groove 51; and the moving end 42 of the movable switch contact is aligned with the
  • the cam assembly described above realizes the breaking of the vacuum interrupter 4 in a manner of rotating the small contact 7 that can be used as a lever.
  • the whole process is consisting of following transmissions, i.e. rotation pair realized by the moving contact 2, the lever realized by the small contact 7, the movement synthesis of the guiding groove 81 and the leading groove 51.
  • a contact angle of the moving contact 2 and the breaking stroke of the vacuum interrupter 4 can be controlled not to be less than 7 mm, and can over-travel can also be set by lengths of the guiding groove 81 in the cam 8 and the leading groove 51 in the cam frame 5 and interaction thereof and the length of the arm of force of the small contact 7.
  • the cam assembly further includes a torsional spring 9 fixedly installed to the cam frame 5, wherein a supporting leg of the torsional spring 9 operatively abuts the cam 8 so as to pivot along with the cam 8 relative to the cam frame 5 to accumulate elastic potential energy, and subsequently to release the elastic potential energy to return the cam 8 to the initial position; and thus, when the cam 8 rotates clockwise or counterclockwise, the cam can be reset rapidly under the action of the torsional spring 9.
  • the small contact 7 is designed as an elongated piece, which includes a first end pivoted to the cam frame 5 and a second end opposite to the first end, wherein the second end is provided with an elastic sheet 71 elastically abutting the moving contact 2; the elastic sheet 71 is designed to expand outwards here and located at the top of the second end of the small contact 7; and when the moving contact 2 performs the breaking operation around the pivot axis A2, the elastic sheet 71 can be snapped into the inner sides of two contact pieces of the moving contact 2.
  • the design ensures the continuity of the eletrical current.
  • a copper sheet 73 electrically communicated with the electric conductor 6 is also arranged below the elastic sheet 71; the moving contact 2 may contact the copper sheet 73 when continuing the action; the current is transferred to the vacuum interrupter 4 through the copper sheet 73 and the electric conductor 6; and the above design can realize a simple bypass circuit.
  • the small contact 7 is preferably made of insulation material and the second end of the small contact is provided with an insulation material layer on the side opposite to the elastic sheet 71.
  • the horizontal portion 10B of the insulation bracket 10 can also be fixedly provided with a lead holder 53, wherein as best shown in Figure 6 , the lead holder 53 is provided with a horizontal installation section installed to the plane below the horizontal portion 10B and an arc section for leading the electric conductor 6, thereby presenting a mirrored "5" shape in a cross section.
  • a groove for embedding the electric conductor 6 is arranged in the arc section, at the installed state, and the electric conductor moves in an arc path defined by the groove in the arc section, which effectively prevents the electric conductor 6 from being broken due to repeated bending, affecting the reliability and service life of the whole parallel breaking load sw tch 100.
  • the parallel breaking load switch 100 can execute different types of operations, and each of the operations corresponds to given change in the operation state. Specifically, as shown in Figure 8 , the moving contact 2 is located on the closed position, the vacuum interrupter 4 then is located on a default closed position, that is, the fixed switch contact and the movable switch contact are closed. When the moving contact 2 is located at the closed position, the moving contact 2 is kept in close contact with the second end 12 of the stationary contact 1 by means of the abutting portion 22, the current can flow from the first end of the stationary contact 1 to the stationary contact and further flows through the moving contact 2 to reach the wiring terminal 25, and the parallel breaking load switch 100 can be considered to be in closed configuration.
  • the moving contact 2 begins to rotate around the pivot axis A2 and contacts the second end of the stationary contact 1 and the cam assembly (specifically the small contact 7 in the cam assembly) connected with the vacuum interrupter 4 at a certain rotation point, thus forming a commutation point, wherein since the fixed switch contact and the movable switch contact of the vacuum interrupter 4 are closed, a bypass current circuit from the first end 11 of the stationary contact 1 to the moving contact 2 directly through the vacuum interrupter 4 and the electric conductor 6 is thus formed.
  • the parallel breaking load switch 100 is considered to be in the commutation configuration.
  • the moving contact 2 continues to rotate around the pivot axis A2 under the action of the actuator 21 and thus is separated from the second end 12 of the stationary contact 1 but kept in electric contact with the small contact 7; and moreover, the fixed switch contact and the movable switch contact of the vacuum interrupter 4 still contact each other, so that the current flows to the vacuum interrupter 4 only from the first end 11 of the stationary contact 1 and then flows to the moving contact 2 through the vacuum interrupter 4.
  • the moving contact 2 keeps rotating, and during the rotation of the moving contact, the small contact 7 continues to rotate correspondingly, the cam 8 is then driven by the abutting pin 82 to rotate together relative to the cam frame 5 with the pivot point 52 as the rotating axis A1, and consequently, with the rotation of the cam assembly, the moving end 42 of the movable switch contact accommodated in the leading groove 51 and the guiding groove 81 of the cam assembly moves linearly along the axis of the vacuum interrupter 4 from the on position to the off position so as to separate the movable switch contact from the fixed switch contact of the vacuum interrupter 4, and the stroke of the linear movement is not less than 7 mm.
  • the result is that the contact of the vacuum interrupter 4 is already broken to cut off the current.
  • the moving contact 2 continues to rotate and passes through the small contact 7, the small contact 7 is then reset under the action of the torsional spring 9 and drives the vacuum interrupter 4 to be returned to the default closed configuration; however, the moving contact 2 is already separated from the small contact 7 and the first end 12 of the stationary contact 1; therefore, the parallel breaking load switch 100 is already in the breaking configuration; and as the moving contact rotates to contact the grounding contact 3 and is stopped by the grounding contact, the parallel breaking load switch 100 is then in the grounding configuration.
  • the parallel breaking load switch 100 can be changed from grounding configuration to closed configuration; moreover, a current path is formed between the second end 11 of the stationary contact 1 and the moving contact 2; and moreover, the vacuum interrupter 4 is configured in a state that the contact is closed, and there is no current flowing through the vacuum interrupter. Thereafter, the parallel breaking load switch 100 is prepared for another breaking operation. Since the opposite side of the small contact 7 is designed to be insulated, the moving contact 2 is prevented from switching on the bypass circuit when pivoting to the closed position in an opposite direction.

Landscapes

  • High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)

Claims (9)

  1. Parallelgeschalteter Lastschalter, geeignet zum Unterbrechen einer Stromleitung eines elektrischen Mittelspannungssystems, umfassend:
    - einen stationären Kontakt (1), umfassend ein erstes Ende (11), das mit der Stromleitung verbunden ist, und ein zweites Ende (12), das dem ersten Ende gegenüberliegt;
    - einen beweglichen Kontakt (2), wobei der bewegliche Kontakt so konfiguriert ist, dass er sich um eine Schwenkachse (A2) zwischen einer geschlossenen Position, einer Kommutierungsposition und einer Unterbrechungsposition drehen kann, wobei der bewegliche Kontakt mit dem zweiten Ende des stationären Kontakts in der geschlossenen Position verbunden ist und elektrisch mit dem stationären Kontakt in Verbindung steht, und wobei der bewegliche Kontakt von dem stationären Kontakt gelöst ist, wenn er sich um die Schwenkachse in die Unterbrechungsposition dreht;
    - einen Vakuumschalter (4) mit einem festen Schaltkontakt und einem darin angeordneten beweglichen Schaltkontakt, wobei der stationäre Kontakt elektrisch mit dem festen Schaltkontakt verbunden ist; ferner umfassend:
    - eine Nockenanordnung (5, 8), wobei die Nockenanordnung mit einem kleinen Kontakt (7) bereitgestellt ist, der sich um eine Drehachse (A1) drehen kann, wobei der kleine Kontakt mit einem elektrischen Leiter (6) bereitgestellt ist, der mit dem beweglichen Kontakt elektrisch verbunden werden kann, um in Reaktion auf die Drehung des beweglichen Kontakts um die Schwenkachse mit dem Vakuumschalter elektrisch verbunden zu werden,
    wobei ein bewegliches Ende (42) des beweglichen Schaltkontakts entlang der Achse des Vakuumschalters ausgerichtet ist und eine lineare Bewegung zwischen einer Aus-Position und einer Ein-Position ausführen kann, das bewegliche Ende des beweglichen Schaltkontakts geführt werden kann und funktionsfähig mit der Nockenanordnung verbunden sein kann, und ein Weg der linearen Bewegung nicht weniger als 7 mm beträgt;
    in der geschlossenen Position der bewegliche Kontakt in Kontakt mit dem stationären Kontakt steht und von dem kleinen Kontakt beabstandet ist, der bewegliche Schaltkontakt in der Ein-Position in Kontakt mit dem festen Schaltkontakt steht und elektrischer Strom durch den stationären Kontakt zu dem beweglichen Kontakt fließen kann;
    wobei sich der bewegliche Kontakt um die Schwenkachse in einer ersten Drehrichtung von der geschlossenen Position zur Kommutierungsposition dreht und während der Drehung der bewegliche Kontakt in Kontakt mit dem kleinen Kontakt ist, so dass der elektrische Strom durch den stationären Kontakt und den Vakuumschalter über den kleinen Kontakt zum beweglichen Kontakt zu fließen kann; und
    wobei sich der bewegliche Kontakt weiter um die Schwenkachse in der ersten Drehrichtung von der Kommutierungsposition zur Unterbrechungsposition dreht; wobei der bewegliche Kontakt den kleinen Kontakt dazu antreibt, sich um die Drehachse zu drehen und die Nockenanordnung betätigt, so dass sich das bewegliche Ende des beweglichen Schaltkontakts linear von der Ein-Position zur Aus-Position entlang der Achse des Vakuumschalters bewegt, um den beweglichen Schaltkontakt von dem festen Schaltkontakt des Vakuumschalters zu trennen, wobei die Nockenanordnung Folgendes umfasst:
    - einen Nockenrahmen (5), wobei der kleine Kontakt schwenkbar mit dem Nockenrahmen verbunden ist und der Nockenrahmen mit einer vordere Nut (51) bereitgestellt wird, um das bewegliche Ende des beweglichen Schaltkontakts zu führen, um sich linear zwischen der Aus-Position und der Ein-Position zu bewegen;
    - einen Nocken (8), der schwenkbar mit dem Nockenrahmen verbunden ist, wobei der Nocken mit einem Anschlagstift (82), der funktionsfähig mit dem kleinen Kontakt verbunden ist, und einer Führungsnut (81) bereitgestellt ist, um das bewegliche Ende des beweglichen Schaltkontakts sandwichartig zu halten;
    wobei der kleine Kontakt die Nocke antreiben kann, um gemeinsam um die Drehachse zu schwenken, so dass sich das bewegliche Ende des beweglichen Schaltkontakts über die Führungsnut und die vordere Nut linear zwischen der Aus-Position und der Ein-Position bewegt,
    und wobei die Nockenanordnung weiter eine Torsionsfeder (9) umfasst, die fest an dem Nockenrahmen installiert ist, wobei ein stützendes Bein der Torsionsfeder funktionsfähig an dem Nocken anliegt, um zusammen mit dem Nocken relativ zu dem Nockenrahmen zu schwenken, um elastische potentielle Energie zu akkumulieren, und um anschließend die elastische potentielle Energie freizugeben, um den Nocken in eine Ausgangsstellung zurückzubringen;
  2. Parallel schaltender Lastschalter nach Anspruch 1, wobei der kleine Kontakt (7) als längliches Teil ausgebildet ist, umfassend ein erstes Ende, das schwenkbar an dem Nockenrahmen (5) angebracht ist, und ein zweites Ende, das dem ersten Ende gegenüberliegt, wobei das zweite Ende mit einem elastischen Blatt (71) bereitgestellt ist, das elastisch an dem beweglichen Kontakt (2) anliegen kann.
  3. Parallel schaltender Lastschalter nach Anspruch 1, ferner umfassend eine Isolierhalterung (10), die einstückig ausgebildet ist und einen horizontalen Abschnitt (10B) zum festen Installieren des Nockenrahmens (5) und des Vakuumschalters (4) sowie einen vertikalen Abschnitt (10A) zum festen Installieren des stationären Kontakts (1) umfasst.
  4. Parallel schaltender Lastschalter nach Anspruch 1, wobei der bewegliche Kontakt (2) ein Paar beabstandeter Kontaktstücke umfasst, wobei ein Ende des Kontaktstücks mit einem kugelförmigen Abschnitt versehen ist, der nach außen vorsteht und betriebsfähig mit einem Stellantrieb (21) verbunden ist, um so betätigt zu werden, dass er sich um die Schwenkachse (A2) zwischen der geschlossenen Position, der Kommutierungsposition und der Unterbrechungsposition dreht, und das andere Ende des Kontaktstücks mit einem Anschlagabschnitt bereitgestellt ist, der nach außen vorsteht und einen Oberflächenkontakt (22) mit dem zweiten Ende (12) des stationären Kontakts (1) bildet.
  5. Parallel schaltender Lastschalter nach Anspruch 4, ferner umfassend einen Spannungsausgleichsring (24), der benachbart zu dem kugelförmigen Abschnitt des Kontaktstücks angeordnet ist und zum Ausgleich eines elektrischen Feldes des durch den beweglichen Kontakt (2) fließenden Stroms verwendet wird, und eine halbkreisförmige Abdeckungsanordnung (23), die benachbart zu dem Anschlagabschnitt des Kontaktstücks auf beabstandete Weise angeordnet ist und zur Verhinderung einer Teilentladung verwendet wird.
  6. Parallel schaltender Lastschalter nach Anspruch 2, wobei der kleine Kontakt (7) aus einem isolierenden Material besteht und das zweite Ende (12) an einer dem Kontaktstück gegenüberliegenden Seite mit einer isolierenden Materialschicht bereitgestellt ist.
  7. Parallel schaltender Lastschalter nach Anspruch 1, ferner umfassend einen Erdungskontakt (3), der sich an einer Seite des beweglichen Kontakts (2) befindet und mit einem Erdungsleiter elektrisch gekoppelt werden kann, wobei der Erdungskontakt im Allgemeinen U-förmig gestaltet ist und ein erstes Ende, das mit dem Erdungsleiter verbunden ist, ein zweites Ende, das dem ersten Ende (11) gegenüberliegt, und einen hohlen Abschnitt umfasst, der sich zwischen dem ersten Ende und dem zweiten Ende (12) befindet, wobei das zweite Ende mit einem Paar von Kontaktfüßen (31) bereitgestellt ist, die an den beweglichen Kontakt angepasst sind.
  8. Parallel schaltender Lastschalter nach Anspruch 1, ferner umfassend eine Leitungshalterung (53), die unterhalb des horizontalen Abschnitts (10B) der Isolierhalterung (10) angeschlossen ist, wobei die Leitungshalterung mit einem Lichtbogenabschnitt zum Führen eines elektrischen Leiters (6) bereitgestellt ist und eine Nut zum Einbetten des elektrischen Leiters in dem Lichtbogenabschnitt angeordnet ist.
  9. Mittelspannungsschaltanlage, umfassend ein mit Isoliergas gefülltes Gehäuse (C) und den in dem Gehäuse angeordneten parallel schaltenden Lastschalter (100), wobei der parallel schaltende Lastschalter der parallel schaltende Lastschalter nach einem der Ansprüche 1-8 ist.
EP24183100.7A 2023-06-21 2024-06-19 Parallel schaltender lastschalter und mittelspannungsschaltanlage damit Active EP4481784B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202321592062.7U CN220358020U (zh) 2023-06-21 2023-06-21 并联开断负荷开关及具有其的中压开关设备

Publications (2)

Publication Number Publication Date
EP4481784A1 EP4481784A1 (de) 2024-12-25
EP4481784B1 true EP4481784B1 (de) 2026-01-28

Family

ID=89506039

Family Applications (1)

Application Number Title Priority Date Filing Date
EP24183100.7A Active EP4481784B1 (de) 2023-06-21 2024-06-19 Parallel schaltender lastschalter und mittelspannungsschaltanlage damit

Country Status (4)

Country Link
EP (1) EP4481784B1 (de)
JP (1) JP2025011037A (de)
KR (1) KR20240178238A (de)
CN (1) CN220358020U (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4675659A1 (de) * 2024-07-02 2026-01-07 Efacec Energia - Máquinas e Equipamentos Eléctricos S.A. Lasttrennschalter
CN119132849B (zh) * 2024-11-12 2025-04-18 广东正超电气有限公司 一种环保型负荷开关柜并联式开断装置
CN121439597A (zh) * 2025-12-31 2026-01-30 博海机电科技集团有限公司 一种负荷开关

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2970809B1 (fr) * 2011-01-25 2013-02-22 Schneider Electric Ind Sas Dispositif de coupure moyenne tension comprenant une ampoule a vide
ES2601385T3 (es) * 2012-06-25 2017-02-15 Siemens Aktiengesellschaft Seccionador en carga de tres posiciones para instalaciones de distribución de media tensión
ES2995238T3 (en) * 2021-03-03 2025-02-07 Abb Schweiz Ag A medium voltage switching apparatus

Also Published As

Publication number Publication date
EP4481784A1 (de) 2024-12-25
JP2025011037A (ja) 2025-01-23
KR20240178238A (ko) 2024-12-30
CN220358020U (zh) 2024-01-16

Similar Documents

Publication Publication Date Title
EP4481784B1 (de) Parallel schaltender lastschalter und mittelspannungsschaltanlage damit
US7829814B2 (en) Vacuum circuit interrupter grounding assembly
KR101463374B1 (ko) 스위칭 디바이스 및 개폐기
US11776779B2 (en) Medium voltage switching apparatus
US11715613B2 (en) Medium voltage switching apparatus
US12087527B2 (en) Switching device on an electric line comprising a vacuum interrupter
US20120181156A1 (en) Gas-insulated high-voltage switching system
EP3046128B1 (de) Nebenschluss Unterbrechersystem
KR20230159282A (ko) 중전압 스위칭 장치
EP4277059A1 (de) Schaltanlagen für elektrische stromverteilungsnetze
EP4276872B1 (de) Mittelspannungsschaltvorrichtung
CN101248503A (zh) 带有限制可移动的接触件偏转的限制元件的触点装置
EP3046129B1 (de) Lastschaltsystem mit parallelem Strompfad
EP4030455A1 (de) Mittelspannungsschaltvorrichtung
EP4089704B1 (de) Mittelspannungsschaltvorrichtung
EP4459653B1 (de) Schaltvorrichtung für elektrische systeme
EP4432324B1 (de) Schaltanlagenarchitektur
EP4276874B1 (de) Mittelspannungsschaltvorrichtung
EP4675659A1 (de) Lasttrennschalter
GB2643406A (en) Switching device
CN120954919A (zh) 一种隔离开关以及电气设备
CN120833986A (zh) 用于电气系统的开关设备
CN117133588A (zh) 中压开关装置
CN121034898A (zh) 一种真空断路器以及隔离开关
CN120709100A (zh) 三相共箱式快速接地开关、气体绝缘金属封闭开关设备

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN PUBLISHED

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC ME MK MT NL NO PL PT RO RS SE SI SK SM TR

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20250612

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: GRANT OF PATENT IS INTENDED

INTG Intention to grant announced

Effective date: 20250904

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE PATENT HAS BEEN GRANTED

P01 Opt-out of the competence of the unified patent court (upc) registered

Free format text: CASE NUMBER: UPC_APP_0017733_4481784/2025

Effective date: 20251216

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC ME MK MT NL NO PL PT RO RS SE SI SK SM TR

REG Reference to a national code

Ref country code: CH

Ref legal event code: F10

Free format text: ST27 STATUS EVENT CODE: U-0-0-F10-F00 (AS PROVIDED BY THE NATIONAL OFFICE)

Effective date: 20260128

Ref country code: GB

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 602024002271

Country of ref document: DE

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: NL

Ref legal event code: FP