EP2842145A1 - Electric switching system - Google Patents

Electric switching system

Info

Publication number
EP2842145A1
EP2842145A1 EP14700712.4A EP14700712A EP2842145A1 EP 2842145 A1 EP2842145 A1 EP 2842145A1 EP 14700712 A EP14700712 A EP 14700712A EP 2842145 A1 EP2842145 A1 EP 2842145A1
Authority
EP
European Patent Office
Prior art keywords
isolator
switchgear
earthing
cam
earthing 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.)
Granted
Application number
EP14700712.4A
Other languages
German (de)
French (fr)
Other versions
EP2842145B1 (en
Inventor
Lutz Drews
Achim Stelter
Oliver Voigt
Heiko Garbe
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.)
General Electric Technology GmbH
Original Assignee
Alstom Technology AG
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 Alstom Technology AG filed Critical Alstom Technology AG
Publication of EP2842145A1 publication Critical patent/EP2842145A1/en
Application granted granted Critical
Publication of EP2842145B1 publication Critical patent/EP2842145B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H01H33/42—Driving mechanisms

Definitions

  • the invention relates to an electrical switchgear with a series circuit consisting of a first disconnector / earthing switch, a circuit breaker and a second disconnector / earthing switch.
  • Such a switchgear is well known. It is also known that each of the three switches, a drive is assigned, with which the respective switch can be switched to its switching positions.
  • the two isolator / earthing switches may only be earthed one after the other. This can be achieved, for example, by electronically monitoring the switch positions of the two isolator / earthing switches and, depending on the determined switching positions, influencing the drive for the respective isolator / earthing switch. In this way, thus by means of the monitoring of the switching positions and the corresponding control of the drives of the two isolator / earthing switch a simultaneous changeover of both disconnector / earthing switch can be avoided in the grounded position.
  • the object of the invention is to improve the known switchgear.
  • a switching drive having a component provided with a first cam track associated with the first disconnector / earthing switch and provided with a second cam track associated with the second disconnector / earthing switch, wherein the component is drivable by a single drive.
  • the switching positions of the two isolator / earthing switch can be specified via the two curved paths. With the help of the two curved paths, any change or sequence of switching positions of the two isolator / earthing switches can thus be set in advance in a desired manner. Since the two cam tracks are arranged on or on the same component, only the set switching positions of the two isolator / earthing switch can occur. However, other switching positions or changes in the switching positions can not occur.
  • the two isolator / earthing switch can be locked by the invention in terms of their switching positions in a desired manner to each other.
  • the cost of this lock is low.
  • FIG. 2 shows a schematic perspective view of a first embodiment of a switching drive for the switchgear of Figure 1
  • Figures 3a, 3b show two schematic views of a second embodiment of a switching drive for the switchgear of Figure 1
  • 4 shows a schematic perspective view of a third embodiment of a switching drive for the switchgear of Figure 1.
  • FIG. 1 shows an electrical switchgear 10, in particular a high-voltage switchgear.
  • the switchgear 10 has a series circuit consisting of a first disconnector / earthing switch TE1, an associated circuit breaker LS and a second disconnector / earthing switch TE2 connected thereto.
  • the first isolator / earthing switch TE1, the power switch LS and the second isolator / earthing switch TE2 are each designed as separate switching devices.
  • the circuit breaker LS and / or the two isolator / earthing switches TE1, TE2 can be housed in a container filled with an insulating gas.
  • the two isolator / earthing switches TE1, TE2 each have three terminals 11, 12, 13, wherein the terminal 13 is grounded.
  • To the terminal 11 of the first isolator / earthing switch TE1 is a first input / output EA1 and to the terminal 11 of the second isolator / earthing switch TE2, a second input / output EA2 is connected.
  • To the terminal 12 of the first isolator / earthing switch TE1 is the circuit breaker LS with its one terminal and to the terminal 12 of the second isolator / earthing switch TE2, the power switch LS is connected to its other terminal.
  • Each of the two isolator / earthing switches TE1, TE2 can assume the following three switching positions: the two terminals 11, 12 are connected to one another; the three terminals 11, 12, 13 are not connected to each other; the terminal 11 is connected to the terminal 13 and thus grounded.
  • These three switch positions are referred to below as positions P11, P12, P13 for the first disconnector / earthing switch TE1 and as positions P21, P22, P23 for the second disconnector / earthing switch TE2.
  • the two isolator / earthing switches TE1, TE2 are mechanically coupled to a common switching drive 15.
  • the mechanical coupling is shown only schematically in FIG. 1 as arrows 16, 17.
  • the switching drive 15 of Figure 1 is described below with reference to FIG 2 in more detail.
  • the circuit breaker LS is either closed and thus turned on or open and thus causing an interruption. Between the two switch positions of the circuit breaker LS can be switched back and forth with the aid of a in the figure 1 only schematically indicated as arrow 19 means.
  • FIG. 2 shows a first embodiment 15 'of the common switching drive 15 for the two isolator / earthing switches TE1, TE2 shown in more detail.
  • the switching drive 15 ' On the left side of the switching drive 15 ' is the mechanical coupling 16 to the first isolator / earthing switch TE1 and on the right side of the switching drive 15', the mechanical coupling 17 is indicated to the second isolator / earthing switch TE2.
  • the switching positions P11, P12, P13, P21, P22, P23 of the two isolator / earthing switches TE1, TE2 are indicated in FIG. 2, in each case with an associated electrical circuit symbol. It should be noted that the circuit diagrams shown are only for the purpose of explanation and need not necessarily be present.
  • the switching drive 15 ' has a frame 21, on which an electric motor 22 is held.
  • the electric motor 22 has a drive shaft 23 which carries a cam 24.
  • the axis of the cam 24 is aligned coaxially with the drive axis 23 of the electric motor 22.
  • the cam 24 can thus be rotated by the electric motor 22 about its axis in both directions.
  • the cam 24 two cam tracks KB1, KB2 are present, which are introduced in the present case as recesses in the cam 24.
  • the first curved path KB1 is associated with the first isolator / earthing switch TE1
  • the second curved path KB2 is associated with the second isolator / earthing switch TE2.
  • first cam track KB1 engages a first Abtastwitch AS1, which is held on a rod 26.
  • the rod 26 is guided translationally displaceable in a guide 27.
  • the guide 27 is held on the frame 21.
  • a second scanning pin AS2 engages in the second curved path KB2, wherein the second scanning pin AS2 is held on a corresponding rod 28, which in turn is translationally displaceable in a guide 29.
  • each of the two rods 26, 28 is provided with a position indicator SA1, SA2.
  • the first position indicator SA1 indicates which of the three possible switching positions P11, P12, P13 the first disconnector / earthing switch TE1 occupies
  • the second position indicator SA2 indicates which of the three possible switching positions P21, P22, P23 the second disconnector / earth Switch TE2 occupies. It should be noted that the aforementioned position indicator SA1, SA2 are present only for the purpose of explanation and must by no means be mandatory.
  • the rod 26 is a part of the mechanical coupling 16, via which the switching drive 15 is connected to the first isolator / earthing switch TE1.
  • the rod 28 is a component of the mechanical coupling 17, via which the switching drive 15 is connected to the second isolator / earthing switch TE2.
  • a translational movement of the respective rod 26, 28 thus leads to a movement and optionally change the switching position of the associated disconnector / earthing switch TE1, TE2.
  • FIG. 2 shows an initial position of the cam disk 24, in which the two scanning pins AS1, AS2 are located approximately at the beginning of the respectively associated cam track KB1, KB2.
  • the two disconnector / earthing switches TE1, TE2 are in this initial position in the switching position P11, P21, in each case the terminals 11, 12 of the disconnector / earthing switches TE1, TE2 with each other are connected.
  • the two isolator / earthing switches TE1, TE2 can be switched by the common switching drive 15 ', for example, as follows.
  • a first rotation of the cam 24 in a counterclockwise direction causes both isolator / earthing switches TE1, TE2 to go into their switching position P12, P22. This means that the terminals 11, 12, 13 of the two isolator / earthing switches TE1, TE2 are not connected to each other and the two isolator / earthing switches TE1, TE2 are thus opened, but not earthed.
  • both inputs / outputs EA1, EA2 are earthed.
  • a rotation of the cam 24 in the opposite direction, ie in a clockwise direction causes the two isolator / earthing switches TE1, TE2 return to their initial position, ie in the switching positions P11, P21.
  • FIG. 3 a is a plan view and in FIG. 3 b a front view of the switching drive 15 "rotated by 90 degrees.
  • the switching drive 15 '' has a frame 41 on which an electric motor 42 is held.
  • the electric motor 42 has a drive shaft 43 which carries a cam cylinder 44.
  • the axis of the cam cylinder 44 is aligned coaxially with the drive axis 43 of the electric motor 42.
  • the cam cylinder 44 can thus be rotated by the electric motor 42 about its axis in both directions.
  • the cam cylinder 44 two cam tracks KB1, KB2 are present, which are introduced in the present case as depressions in the cam cylinder 44.
  • the first curved path KB1 is associated with the first isolator / earthing switch TE1
  • the second curved path KB2 is associated with the second isolator / earthing switch TE2.
  • first cam track KB1 engages a first Abtastwitch AS1, which is attached to a lever 46.
  • the lever 46 is held on the frame 41 and pivotable about an axis 47 there.
  • a second scanning pin AS2 engages in the second curved path KB2, the second scanning pin AS2 being fastened to a corresponding lever 48, which is held pivotably on the frame 21 about an axis 49.
  • FIG. 4 shows a third exemplary embodiment 15 '' 'for the common switching drive 15 of the two isolator / earthing switches TE1, TE2.
  • the switching drive 15 '' ' has a frame 51, on which an electric motor 52 is held.
  • the electric motor 52 has a drive axle which carries a gear 53.
  • a cam plate 54 is provided, which has a toothing on its upper longitudinal side, and which is arranged with its lower longitudinal side in a rail 55 slidably.
  • the gear 53 connected to the electric motor 52 engages in the toothing of the cam plate 54.
  • the cam plate 54 is thus movable via the gear 53 and the toothing along the rail 55 in both longitudinal directions.
  • the cam plate 54 two cam tracks KB1, KB2 are present, which are presently introduced as recesses in the cam plate 54.
  • the first curved path KB1 is associated with the first isolator / earthing switch TE1
  • the second curved path KB2 is associated with the second isolator / earthing switch TE2.
  • first cam track KB1 engages a first Abtastwitch AS1, which is attached to a lever 56.
  • the lever 56 is held on the frame 51 and pivotable about an axis 57 there.
  • a second scanning pin AS2 engages in the second curved path KB2, wherein the second scanning pin AS2 is fastened to a corresponding lever 58, which is held pivotably on the frame 51 about an axis 59.
  • a different type of drive may be provided, such as a pneumatic drive or a hydraulic drive or a magnetic drive or a manual drive or the like.
  • the drive does not have to be designed to rotate like the electric motor 22, 42, 52, but can also perform a longitudinal movement or other movement.

Landscapes

  • Gas-Insulated Switchgears (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Control Of Position Or Direction (AREA)

Abstract

The invention concerns an electric switching system (10) which is provided with a series circuit consisting of a first circuit breaker/earthing switch (TE1), a power switch (LS) and a second circuit breaker/earthing switch (TE2). Also provided is a switch drive (15) comprising a component which is provided with a first curve track (KB1), which is associated with the first circuit breaker/earthing switch (TE1), and with a second curve track (KB2), which is associated with the second circuit breaker/earthing switch (TE2). The component can be driven by a single drive.

Description

    Elektrische Schaltanlage Electrical switchgear
  • Die Erfindung betrifft eine elektrische Schaltanlage mit einer Serienschaltung bestehend aus einem ersten Trenner/Erder-Schalter, einem Leistungsschalter und einem zweiten Trenner/Erder-Schalter. The invention relates to an electrical switchgear with a series circuit consisting of a first disconnector / earthing switch, a circuit breaker and a second disconnector / earthing switch.
  • Eine derartige Schaltanlage ist allgemein bekannt. Dabei ist es ebenfalls bekannt, dass jedem der drei Schalter ein Antrieb zugeordnet ist, mit dem der jeweilige Schalter in seine Schaltstellungen umgeschaltet werden kann. Such a switchgear is well known. It is also known that each of the three switches, a drive is assigned, with which the respective switch can be switched to its switching positions.
  • Bei einer derartigen Schaltanlage kann es erforderlich sein, dass beispielsweise die beiden Trenner/Erder-Schalter nur nacheinander geerdet werden dürfen. Dies kann beispielsweise dadurch erreicht werden, dass die Schaltstellungen der beiden Trenner/Erder-Schalter elektronisch überwacht werden und in Abhängigkeit von den ermittelten Schaltstellungen der Antrieb für den jeweiligen Trenner/Erder-Schalter beeinflusst wird. Auf diese Weise kann somit mittels der Überwachung der Schaltstellungen und der entsprechenden Ansteuerung der Antriebe der beiden Trenner/Erder-Schalter eine gleichzeitige Umschaltung beider Trenner/Erder-Schalter in die geerdete Stellung vermieden werden.In such a switchgear it may be necessary that, for example, the two isolator / earthing switches may only be earthed one after the other. This can be achieved, for example, by electronically monitoring the switch positions of the two isolator / earthing switches and, depending on the determined switching positions, influencing the drive for the respective isolator / earthing switch. In this way, thus by means of the monitoring of the switching positions and the corresponding control of the drives of the two isolator / earthing switch a simultaneous changeover of both disconnector / earthing switch can be avoided in the grounded position.
  • Aufgabe der Erfindung ist es, die bekannte Schaltanlage zu verbessern.The object of the invention is to improve the known switchgear.
  • Diese Aufgabe wird durch eine elektrische Schaltanlage nach dem Anspruch 1 gelöst.This object is achieved by an electrical switchgear according to claim 1.
  • Erfindungsgemäß ist ein Schaltantrieb vorhanden, der ein Bauteil aufweist, das mit einer ersten Kurvenbahn versehen ist, die dem ersten Trenner/Erder-Schalter zugeordnet ist, und das mit einer zweiten Kurvenbahn versehen ist, die dem zweiten Trenner/Erder-Schalter zugeordnet ist, wobei das Bauteil von einem einzigen Antrieb antreibbar ist.According to the invention, there is provided a switching drive having a component provided with a first cam track associated with the first disconnector / earthing switch and provided with a second cam track associated with the second disconnector / earthing switch, wherein the component is drivable by a single drive.
  • Bei der Erfindung können die Schaltstellungen der beiden Trenner/Erder-Schalter über die beiden Kurvenbahnen vorgegeben werden. Mit Hilfe der beiden Kurvenbahnen kann somit jegliche Veränderung bzw. Abfolge von Schaltstellungen der beiden Trenner/Erder-Schalter in einer erwünschten Weise vorab eingestellt werden. Da die beiden Kurvenbahnen auf bzw. an demselben Bauteil angeordnet sind, können nur die eingestellten Schaltstellungen der beiden Trenner/Erder-Schalter auftreten. Andere Schaltstellungen oder Veränderungen der Schaltstellungen können jedoch nicht auftreten. In the invention, the switching positions of the two isolator / earthing switch can be specified via the two curved paths. With the help of the two curved paths, any change or sequence of switching positions of the two isolator / earthing switches can thus be set in advance in a desired manner. Since the two cam tracks are arranged on or on the same component, only the set switching positions of the two isolator / earthing switch can occur. However, other switching positions or changes in the switching positions can not occur.
  • Damit können die beiden Trenner/Erder-Schalter durch die Erfindung im Hinblick auf ihre Schaltstellungen auf eine erwünschte Weise zueinander verriegelt werden. Der Aufwand für diese Verriegelung ist dabei gering. Thus, the two isolator / earthing switch can be locked by the invention in terms of their switching positions in a desired manner to each other. The cost of this lock is low.
  • Weitere Merkmale, Anwendungsmöglichkeiten und Vorteile der Erfindung ergeben sich aus der nachfolgenden Beschreibung von Ausführungsbeispielen der Erfindung, die in zugehörigen Figuren dargestellt sind. Dabei bilden alle beschriebenen oder dargestellten Merkmale für sich oder in beliebiger Kombination den Gegenstand der Erfindung, unabhängig von ihrer Zusammenfassung in den Patentansprüchen oder deren Rückbeziehung sowie unabhängig von ihrer Formulierung bzw. Darstellung in der Beschreibung bzw. in den Figuren.Other features, applications and advantages of the invention will become apparent from the following description of exemplary embodiments of the invention, which are illustrated in the accompanying figures. All described or illustrated features, alone or in any combination form the subject matter of the invention, regardless of their summary in the claims or their dependency and regardless of their formulation or representation in the description or in the figures.
  • Die Figur 1 zeigt ein schematisches Schaltbild einer elektrischen Schaltanlage, die Figur 2 zeigt eine schematische Perspektivansicht eines ersten Ausführungsbeispiels eines Schaltantriebs für die Schaltanlage der Figur 1, die Figuren 3a, 3b zeigen zwei schematische Ansichten eines zweiten Ausführungsbeispiels eines Schaltantriebs für die Schaltanlage der Figur 1, und die Figur 4 zeigt eine schematische Perspektivansicht eines dritten Ausführungsbeispiels eines Schaltantriebs für die Schaltanlage der Figur 1.2 shows a schematic perspective view of a first embodiment of a switching drive for the switchgear of Figure 1, Figures 3a, 3b show two schematic views of a second embodiment of a switching drive for the switchgear of Figure 1 4 shows a schematic perspective view of a third embodiment of a switching drive for the switchgear of Figure 1.
  • In der Figur 1 ist eine elektrische Schaltanlage 10 dargestellt, insbesondere eine Hochspannungsschaltanlage. Die Schaltanlage 10 weist eine Serienschaltung bestehend aus einem ersten Trenner/Erder-Schalter TE1, einem damit verbundenen Leistungsschalter LS und einem damit verbundenen zweiten Trenner/Erder-Schalter TE2 auf. FIG. 1 shows an electrical switchgear 10, in particular a high-voltage switchgear. The switchgear 10 has a series circuit consisting of a first disconnector / earthing switch TE1, an associated circuit breaker LS and a second disconnector / earthing switch TE2 connected thereto.
  • Der erste Trenner/Erder-Schalter TE1, der Leistungsschalter LS und der zweite Trenner/Erder-Schalter TE2 sind jeweils als separate Schaltgeräte ausgebildet. Der Leistungsschalter LS und/oder die beiden Trenner/Erder-Schalter TE1, TE2 kann/können dabei in einem mit einem Isoliergas gefüllten Behälter untergebracht sein.The first isolator / earthing switch TE1, the power switch LS and the second isolator / earthing switch TE2 are each designed as separate switching devices. The circuit breaker LS and / or the two isolator / earthing switches TE1, TE2 can be housed in a container filled with an insulating gas.
  • Die beiden Trenner/Erder-Schalter TE1, TE2 besitzen jeweils drei Anschlüsse 11, 12, 13, wobei der Anschluss 13 auf Erde liegt. An den Anschluss 11 des ersten Trenner/Erder-Schalters TE1 ist ein erster Ein/Ausgang EA1 und an den Anschluss 11 des zweiten Trenner/Erder-Schalters TE2 ist ein zweiter Ein/Ausgang EA2 angeschlossen. An den Anschluss 12 des ersten Trenner/Erder-Schalters TE1 ist der Leistungsschalter LS mit seinem einen Anschluss und an den Anschluss 12 des zweiten Trenner/Erder-Schalters TE2 ist der Leistungsschalter LS mit seinem anderen Anschluss angeschlossen.The two isolator / earthing switches TE1, TE2 each have three terminals 11, 12, 13, wherein the terminal 13 is grounded. To the terminal 11 of the first isolator / earthing switch TE1 is a first input / output EA1 and to the terminal 11 of the second isolator / earthing switch TE2, a second input / output EA2 is connected. To the terminal 12 of the first isolator / earthing switch TE1 is the circuit breaker LS with its one terminal and to the terminal 12 of the second isolator / earthing switch TE2, the power switch LS is connected to its other terminal.
  • Jeder der beiden Trenner/Erder-Schalter TE1, TE2 kann die folgenden drei Schaltstellungen einnehmen: die beiden Anschlüsse 11, 12 sind miteinander verbunden; die drei Anschlüsse 11, 12, 13 sind nicht miteinander verbunden; der Anschluss 11 ist mit dem Anschluss 13 verbunden und damit geerdet. Diese drei Schaltstellungen werden nachfolgend als Stellungen P11, P12, P13 für den ersten Trenner/Erder-Schalter TE1 und als Stellungen P21, P22, P23 für den zweiten Trenner/Erder-Schalter TE2 bezeichnet.Each of the two isolator / earthing switches TE1, TE2 can assume the following three switching positions: the two terminals 11, 12 are connected to one another; the three terminals 11, 12, 13 are not connected to each other; the terminal 11 is connected to the terminal 13 and thus grounded. These three switch positions are referred to below as positions P11, P12, P13 for the first disconnector / earthing switch TE1 and as positions P21, P22, P23 for the second disconnector / earthing switch TE2.
  • Die beiden Trenner/Erder-Schalter TE1, TE2 sind mit einem gemeinsamen Schaltantrieb 15 mechanisch gekoppelt. Die mechanische Kopplung ist in der Figur 1 jeweils nur schematisch als Pfeil 16, 17 dargestellt. Der Schaltantrieb 15 der Figur 1 wird nachfolgend anhand der Figur 2 näher beschrieben. The two isolator / earthing switches TE1, TE2 are mechanically coupled to a common switching drive 15. The mechanical coupling is shown only schematically in FIG. 1 as arrows 16, 17. The switching drive 15 of Figure 1 is described below with reference to FIG 2 in more detail.
  • Der Leistungsschalter LS ist entweder geschlossen und damit leitend geschaltet oder geöffnet und damit eine Unterbrechung bewirkend. Zwischen den beiden Schaltstellungen des Leistungsschalters LS kann mit Hilfe einer in der Figur 1 nur schematisch als Pfeil 19 angedeuteten Einrichtung hin- und her geschaltet werden.The circuit breaker LS is either closed and thus turned on or open and thus causing an interruption. Between the two switch positions of the circuit breaker LS can be switched back and forth with the aid of a in the figure 1 only schematically indicated as arrow 19 means.
  • In der Figur 2 ist ein erstes Ausführungsbeispiel 15‘ des gemeinsamen Schaltantriebs 15 für die beiden Trenner/Erder-Schalter TE1, TE2 detaillierter dargestellt. Auf der linken Seite des Schaltantriebs 15‘ ist die mechanische Kopplung 16 zu dem ersten Trenner/Erder-Schalter TE1 und auf der rechten Seite des Schaltantriebs 15‘ ist die mechanische Kopplung 17 zu dem zweiten Trenner/Erder-Schalter TE2 angedeutet. Weiterhin sind in der Figur 2 die Schaltstellungen P11, P12, P13, P21, P22, P23 der beiden Trenner/Erder-Schalter TE1, TE2 angegeben, und zwar jeweils mit einem zugehörigen elektrischen Schaltzeichen. Es wird darauf hingewiesen, dass die dargestellten Schaltzeichen nur zum Zwecke der Erläuterung vorhanden sind und keinesfalls zwingend vorhanden sein müssen.2 shows a first embodiment 15 'of the common switching drive 15 for the two isolator / earthing switches TE1, TE2 shown in more detail. On the left side of the switching drive 15 'is the mechanical coupling 16 to the first isolator / earthing switch TE1 and on the right side of the switching drive 15', the mechanical coupling 17 is indicated to the second isolator / earthing switch TE2. Furthermore, the switching positions P11, P12, P13, P21, P22, P23 of the two isolator / earthing switches TE1, TE2 are indicated in FIG. 2, in each case with an associated electrical circuit symbol. It should be noted that the circuit diagrams shown are only for the purpose of explanation and need not necessarily be present.
  • Der Schaltantrieb 15‘ weist ein Gestell 21 auf, an dem ein Elektromotor 22 gehalten ist. Der Elektromotor 22 besitzt eine Antriebsachse 23, die eine Kurvenscheibe 24 trägt. Die Achse der Kurvenscheibe 24 ist koaxial zur Antriebsachse 23 des Elektromotors 22 ausgerichtet. Die Kurvenscheibe 24 kann somit von dem Elektromotor 22 um ihre Achse in beide Richtungen gedreht werden. The switching drive 15 'has a frame 21, on which an electric motor 22 is held. The electric motor 22 has a drive shaft 23 which carries a cam 24. The axis of the cam 24 is aligned coaxially with the drive axis 23 of the electric motor 22. The cam 24 can thus be rotated by the electric motor 22 about its axis in both directions.
  • In der Kurvenscheibe 24 sind zwei Kurvenbahnen KB1, KB2 vorhanden, die vorliegend als Vertiefungen in der Kurvenscheibe 24 eingebracht sind. Die erste Kurvenbahn KB1 ist dem ersten Trenner/Erder-Schalter TE1 und die zweite Kurvenbahn KB2 ist dem zweiten Trenner/Erder-Schalter TE2 zugeordnet.In the cam 24, two cam tracks KB1, KB2 are present, which are introduced in the present case as recesses in the cam 24. The first curved path KB1 is associated with the first isolator / earthing switch TE1, and the second curved path KB2 is associated with the second isolator / earthing switch TE2.
  • In die erste Kurvenbahn KB1 greift ein erster Abtaststift AS1 ein, der an einer Stange 26 gehalten ist. Die Stange 26 ist in einer Führung 27 translatorisch verschiebbar geführt. Die Führung 27 ist an dem Gestell 21 gehalten. In entsprechender Weise greift ein zweiter Abtaststift AS2 in die zweite Kurvenbahn KB2 ein, wobei der zweite Abtaststift AS2 an einer entsprechenden Stange 28 gehalten ist, die ihrerseits in einer Führung 29 translatorisch verschiebbar ist.In the first cam track KB1 engages a first Abtaststift AS1, which is held on a rod 26. The rod 26 is guided translationally displaceable in a guide 27. The guide 27 is held on the frame 21. In a corresponding manner, a second scanning pin AS2 engages in the second curved path KB2, wherein the second scanning pin AS2 is held on a corresponding rod 28, which in turn is translationally displaceable in a guide 29.
  • Zum Zwecke der Beschreibung ist jede der beiden Stangen 26, 28 mit einem Stellungsanzeiger SA1, SA2 versehen. Der erste Stellungsanzeiger SA1 zeigt an, welche der drei möglichen Schaltstellungen P11, P12, P13 der erste Trenner/Erder-Schalter TE1 einnimmt, und der zweite Stellungsanzeiger SA2 zeigt an, welche der drei möglichen Schaltstellungen P21, P22, P23 der zweite Trenner/Erder-Schalter TE2 einnimmt. Es wird darauf hingewiesen, dass die vorgenannten Stellungsanzeiger SA1, SA2 nur zum Zwecke der Erläuterung vorhanden sind und keinesfalls zwingend vorhanden sein müssen.For purposes of description, each of the two rods 26, 28 is provided with a position indicator SA1, SA2. The first position indicator SA1 indicates which of the three possible switching positions P11, P12, P13 the first disconnector / earthing switch TE1 occupies, and the second position indicator SA2 indicates which of the three possible switching positions P21, P22, P23 the second disconnector / earth Switch TE2 occupies. It should be noted that the aforementioned position indicator SA1, SA2 are present only for the purpose of explanation and must by no means be mandatory.
  • Gemäß der Figur 2 stellt die Stange 26 ein Bestandteil der mechanischen Kopplung 16 dar, über die der Schaltantrieb 15 mit dem ersten Trenner/Erder-Schalter TE1 verbunden ist. Entsprechend stellt die Stange 28 ein Bestandteil der mechanischen Kopplung 17 dar, über die der Schaltantrieb 15 mit dem zweiten Trenner/Erder-Schalter TE2 verbunden ist. Eine translatorische Bewegung der jeweiligen Stange 26, 28 führt damit zu einer Bewegung und gegebenenfalls Veränderung der Schaltstellung des zugehörigen Trenner/Erder-Schalters TE1, TE2.According to Figure 2, the rod 26 is a part of the mechanical coupling 16, via which the switching drive 15 is connected to the first isolator / earthing switch TE1. Accordingly, the rod 28 is a component of the mechanical coupling 17, via which the switching drive 15 is connected to the second isolator / earthing switch TE2. A translational movement of the respective rod 26, 28 thus leads to a movement and optionally change the switching position of the associated disconnector / earthing switch TE1, TE2.
  • In der Figur 2 ist eine Anfangsstellung der Kurvenscheibe 24 dargestellt, in der die beiden Abtaststifte AS1, AS2 sich etwa am Anfang der jeweils zugehörigen Kurvenbahn KB1, KB2 befinden. Wie aus den beiden Stellungsanzeigern SA1, SA2 hervorgeht, befinden sich die beiden Trenner/Erder-Schalter TE1, TE2 in dieser Anfangsstellung in der Schaltstellung P11, P21, in der jeweils die Anschlüsse 11, 12 der Trenner/Erder-Schalter TE1, TE2 miteinander verbunden sind.FIG. 2 shows an initial position of the cam disk 24, in which the two scanning pins AS1, AS2 are located approximately at the beginning of the respectively associated cam track KB1, KB2. As can be seen from the two position indicators SA1, SA2, the two disconnector / earthing switches TE1, TE2 are in this initial position in the switching position P11, P21, in each case the terminals 11, 12 of the disconnector / earthing switches TE1, TE2 with each other are connected.
  • Es wird angenommen, dass sich der Leistungsschalter LS in seiner geschlossenen Stellung befindet. Gemäß der Figur 1 ist somit ein Stromfluss von dem ersten Ein/Ausgang EA1 zu dem zweiten Ein/Ausgang EA2 oder umgekehrt möglich.It is assumed that the power switch LS is in its closed position. According to FIG. 1, a current flow from the first input / output EA1 to the second input / output EA2 or vice versa is thus possible.
  • Wird nunmehr der Leistungsschalter LS geöffnet, so können die beiden Trenner/Erder-Schalter TE1, TE2 von dem gemeinsamen Schaltantrieb 15‘ beispielsweise wie folgt geschaltet werden.If now the circuit breaker LS is opened, then the two isolator / earthing switches TE1, TE2 can be switched by the common switching drive 15 ', for example, as follows.
  • Eine erste Drehung der Kurvenscheibe 24 im Gegenuhrzeigersinn führt dazu, dass beide Trenner/Erder-Schalter TE1, TE2 in ihre Schaltstellung P12, P22 übergehen. Dies bedeutet, dass die Anschlüsse 11, 12, 13 der beiden Trenner/Erder-Schalter TE1, TE2 nicht miteinander verbunden sind und die beiden Trenner/Erder-Schalter TE1, TE2 damit geöffnet, aber nicht geerdet sind.A first rotation of the cam 24 in a counterclockwise direction causes both isolator / earthing switches TE1, TE2 to go into their switching position P12, P22. This means that the terminals 11, 12, 13 of the two isolator / earthing switches TE1, TE2 are not connected to each other and the two isolator / earthing switches TE1, TE2 are thus opened, but not earthed.
  • Eine weitere Drehung der Kurvenscheibe 24 im Gegenuhrzeigersinn führt dazu, dass der erste Trenner/Erder-Schalter TE1 in seiner Schaltstellung P12 verbleibt, während der zweite Trenner/Erder-Schalter TE2 in seine Schaltstellung P23 übergeht. Der zweite Ein/Ausgang EA2 ist somit über den zweiten Trenner/Erder-Schalter TE2 geerdet.Further rotation of the cam 24 in the counterclockwise direction causes the first disconnector / earthing switch TE1 remains in its switching position P12, while the second disconnector / earthing switch TE2 goes to its switching position P23. The second input / output EA2 is thus earthed via the second isolator / earthing switch TE2.
  • Eine weitere Drehung der Kurvenscheibe 24 im Gegenuhrzeigersinn führt dazu, dass der zweite Trenner/Erder-Schalter TE2 in seiner Schaltstellung P23 verbleibt, während der erste Trenner/Erder-Schalter TE1 in seine Schaltstellung P13 übergeht. Der erste Ein/Ausgang EA1 wird somit über den ersten Trenner/Erder-Schalter TE1 geerdet. Further rotation of the cam 24 counterclockwise causes the second isolator / earthing switch TE2 remains in its switching position P23, while the first disconnector / earthing switch TE1 goes to its switching position P13. The first input / output EA1 is thus grounded via the first isolator / earthing switch TE1.
  • Damit sind beide Ein/Ausgänge EA1, EA2 geerdet.Thus both inputs / outputs EA1, EA2 are earthed.
  • Eine Drehung der Kurvenscheibe 24 in Gegenrichtung, also im Uhrzeigersinn führt dazu, dass die beiden Trenner/Erder-Schalter TE1, TE2 wieder in ihre Anfangsstellung zurückkehren, also in die Schaltstellungen P11, P21.A rotation of the cam 24 in the opposite direction, ie in a clockwise direction causes the two isolator / earthing switches TE1, TE2 return to their initial position, ie in the switching positions P11, P21.
  • Es versteht sich, dass mit Hilfe einer entsprechenden Ausgestaltung der beiden Kurvenbahnen KB1, KB2 auch mehr oder weniger Veränderungen der Schaltstellungen und/oder andere Veränderungen der Schaltstellungen der beiden Trenner/Erder-Schalter TE1, TE2 hervorgerufen können. Ebenfalls versteht es sich, dass durch eine entsprechende Ansteuerung des Elektromotors 22 unter anderem die Geschwindigkeit der Veränderungen der Schaltstellungen beeinflusst werden kann.It is understood that with the aid of a corresponding design of the two curved paths KB1, KB2, more or fewer changes in the switching positions and / or other changes in the switching positions of the two isolator / earthing switches TE1, TE2 can be caused. It is also understood that, among other things, the speed of the changes in the switching positions can be influenced by a corresponding control of the electric motor 22.
  • In den Figuren 3a, 3b ist ein zweites Ausführungsbeispiel 15‘‘ für den gemeinsamen Schaltantrieb 15 der beiden Trenner/Erder-Schalter TE1, TE2 dargestellt. Bei der Figur 3a handelt es sich um eine Draufsicht und bei der Figur 3b um eine um 90 Grad gedrehte Vorderansicht des Schaltantriebs 15‘‘.In the figures 3a, 3b, a second embodiment 15 '' for the common switching drive 15 of the two isolator / earthing switch TE1, TE2 is shown. FIG. 3 a is a plan view and in FIG. 3 b a front view of the switching drive 15 "rotated by 90 degrees.
  • Der Schaltantrieb 15‘‘ weist ein Gestell 41 auf, an dem ein Elektromotor 42 gehalten ist. Der Elektromotor 42 besitzt eine Antriebsachse 43, die einen Kurvenzylinder 44 trägt. Die Achse des Kurvenzylinders 44 ist koaxial zur Antriebsachse 43 des Elektromotors 42 ausgerichtet. Der Kurvenzylinder 44 kann somit von dem Elektromotor 42 um seine Achse in beide Richtungen gedreht werden. The switching drive 15 '' has a frame 41 on which an electric motor 42 is held. The electric motor 42 has a drive shaft 43 which carries a cam cylinder 44. The axis of the cam cylinder 44 is aligned coaxially with the drive axis 43 of the electric motor 42. The cam cylinder 44 can thus be rotated by the electric motor 42 about its axis in both directions.
  • In dem Kurvenzylinder 44 sind zwei Kurvenbahnen KB1, KB2 vorhanden, die vorliegend als Vertiefungen in den Kurvenzylinder 44 eingebracht sind. Die erste Kurvenbahn KB1 ist dem ersten Trenner/Erder-Schalter TE1 und die zweite Kurvenbahn KB2 ist dem zweiten Trenner/Erder-Schalter TE2 zugeordnet.In the cam cylinder 44, two cam tracks KB1, KB2 are present, which are introduced in the present case as depressions in the cam cylinder 44. The first curved path KB1 is associated with the first isolator / earthing switch TE1, and the second curved path KB2 is associated with the second isolator / earthing switch TE2.
  • In die erste Kurvenbahn KB1 greift ein erster Abtaststift AS1 ein, der an einem Hebel 46 befestigt ist. Der Hebel 46 ist an dem Gestell 41 gehalten und dort um eine Achse 47 schwenkbar. In entsprechender Weise greift ein zweiter Abtaststift AS2 in die zweite Kurvenbahn KB2 ein, wobei der zweite Abtaststift AS2 an einem entsprechenden Hebel 48 befestigt ist, der um eine Achse 49 schwenkbar an dem Gestell 21 gehalten ist.In the first cam track KB1 engages a first Abtaststift AS1, which is attached to a lever 46. The lever 46 is held on the frame 41 and pivotable about an axis 47 there. In a corresponding manner, a second scanning pin AS2 engages in the second curved path KB2, the second scanning pin AS2 being fastened to a corresponding lever 48, which is held pivotably on the frame 21 about an axis 49.
  • Bei dem Schaltantrieb 15‘‘ der Figuren 3a, 3b führt eine Drehung des Kurvenzylinders 44 zu einer Schwenkbewegung der beiden Hebel 46, 48. Im Unterschied zu dem Schaltantrieb 15‘ der Figur 2, bei dem eine translatorische Kopplung 16, 17 des Schaltantriebs 15‘ mit den beiden Trenner/Erder-Schaltern TE1, TE2 vorhanden ist, ist diese Kopplung 16, 17 bei dem Schaltantrieb 15‘‘ der Figuren 3a, 3b somit rotatorisch. Ausgehend von den beiden Achsen 47, 49 können die beiden Trenner/Erder-Schalter TE1, TE2 von dem Schaltantrieb 15‘‘ der Figuren 3a, 3b verstellt werden.In the switching drive 15 '' of Figures 3a, 3b, a rotation of the cam cylinder 44 leads to a pivoting movement of the two levers 46, 48. In contrast to the switching drive 15 'of Figure 2, in which a translational coupling 16, 17 of the switching drive 15' is present with the two isolator / earthing switches TE1, TE2, this coupling 16, 17 in the switching drive 15 '' of Figures 3a, 3b thus rotatory. Starting from the two axes 47, 49, the two isolator / earthing switches TE1, TE2 can be adjusted by the switching drive 15 "of FIGS. 3a, 3b.
  • In der Figur 4 ist ein drittes Ausführungsbeispiel 15‘‘‘ für den gemeinsamen Schaltantrieb 15 der beiden Trenner/Erder-Schalter TE1, TE2 dargestellt. FIG. 4 shows a third exemplary embodiment 15 '' 'for the common switching drive 15 of the two isolator / earthing switches TE1, TE2.
  • Der Schaltantrieb 15‘‘‘ weist ein Gestell 51 auf, an dem ein Elektromotor 52 gehalten ist. Der Elektromotor 52 besitzt eine Antriebsachse, die ein Zahnrad 53 trägt. Es ist eine Kurvenplatte 54 vorgesehen, die an ihrer oberen Längsseite eine Zahnung aufweist, und die mit ihrer unteren Längsseite in einer Schiene 55 verschiebbar angeordnet ist. Das mit dem Elektromotor 52 verbundene Zahnrad 53 greift in die Zahnung der Kurvenplatte 54 ein. Die Kurvenplatte 54 ist damit über das Zahnrad 53 und die Zahnung entlang der Schiene 55 in beide Längsrichtungen bewegbar. The switching drive 15 '' 'has a frame 51, on which an electric motor 52 is held. The electric motor 52 has a drive axle which carries a gear 53. It is a cam plate 54 is provided, which has a toothing on its upper longitudinal side, and which is arranged with its lower longitudinal side in a rail 55 slidably. The gear 53 connected to the electric motor 52 engages in the toothing of the cam plate 54. The cam plate 54 is thus movable via the gear 53 and the toothing along the rail 55 in both longitudinal directions.
  • In der Kurvenplatte 54 sind zwei Kurvenbahnen KB1, KB2 vorhanden, die vorliegend als Vertiefungen in der Kurvenplatte 54 eingebracht sind. Die erste Kurvenbahn KB1 ist dem ersten Trenner/Erder-Schalter TE1 und die zweite Kurvenbahn KB2 ist dem zweiten Trenner/Erder-Schalter TE2 zugeordnet.In the cam plate 54, two cam tracks KB1, KB2 are present, which are presently introduced as recesses in the cam plate 54. The first curved path KB1 is associated with the first isolator / earthing switch TE1, and the second curved path KB2 is associated with the second isolator / earthing switch TE2.
  • In die erste Kurvenbahn KB1 greift ein erster Abtaststift AS1 ein, der an einem Hebel 56 befestigt ist. Der Hebel 56 ist an dem Gestell 51 gehalten und dort um eine Achse 57 schwenkbar. In entsprechender Weise greift ein zweiter Abtaststift AS2 in die zweite Kurvenbahn KB2 ein, wobei der zweite Abtaststift AS2 an einem entsprechenden Hebel 58 befestigt ist, der um eine Achse 59 schwenkbar an dem Gestell 51 gehalten ist. In the first cam track KB1 engages a first Abtaststift AS1, which is attached to a lever 56. The lever 56 is held on the frame 51 and pivotable about an axis 57 there. In a corresponding manner, a second scanning pin AS2 engages in the second curved path KB2, wherein the second scanning pin AS2 is fastened to a corresponding lever 58, which is held pivotably on the frame 51 about an axis 59.
  • Bei dem Schaltantrieb 15‘‘‘ der Figur 4 führt eine Längsbewegung der Kurvenplatte 54 in der Schiene 55 zu einer Schwenkbewegung der beiden Hebel 56, 58. Im Unterschied zu dem Schaltantrieb 15‘ der Figur 2, bei dem eine translatorische Kopplung 16, 17 des Schaltantriebs 15‘ mit den beiden Trenner/Erder-Schaltern TE1, TE2 vorhanden ist, ist diese Kopplung 16, 17 bei dem Schaltantrieb 15‘‘‘ der Figur 4 somit rotatorisch. Ausgehend von den beiden Achsen 57, 59 können die beiden Trenner/Erder-Schalter TE1, TE2 von dem Schaltantrieb 15‘‘‘ der Figur 4 verstellt werden.In the switching drive 15 '' 'of Figure 4, a longitudinal movement of the cam plate 54 in the rail 55 to a pivotal movement of the two levers 56, 58. In contrast to the switching drive 15' of Figure 2, in which a translational coupling 16, 17 of Switching drive 15 'with the two isolator / earthing switches TE1, TE2 is present, this coupling 16, 17 in the switching drive 15' '' of Figure 4 thus rotatory. Starting from the two axes 57, 59, the two isolator / earthing switches TE1, TE2 can be adjusted by the switching drive 15 '"of FIG.
  • Es wird darauf hingewiesen, dass in allen drei Ausführungsbeispielen des Schaltantriebs 15 anstelle des Elektromotors 22, 42, 52 auch ein andersartiger Antrieb vorgesehen sein kann, beispielsweise ein pneumatischer Antrieb oder ein hydraulischer Antrieb oder ein magnetischer Antrieb oder auch ein manueller Antrieb oder dergleichen. Der Antrieb muss dabei nicht wie der Elektromotor 22, 42, 52 rotierend ausgebildet sein, sondern kann auch eine Längsbewegung oder sonstige Bewegung ausführen.It should be noted that in all three embodiments of the switching drive 15 instead of the electric motor 22, 42, 52, a different type of drive may be provided, such as a pneumatic drive or a hydraulic drive or a magnetic drive or a manual drive or the like. The drive does not have to be designed to rotate like the electric motor 22, 42, 52, but can also perform a longitudinal movement or other movement.

Claims (9)

  1. Elektrische Schaltanlage (10) mit einer Serienschaltung bestehend aus einem ersten Trenner/Erder-Schalter (TE1), einem Leistungsschalter (LS) und einem zweiten Trenner/Erder-Schalter (TE2), dadurch gekennzeichnet, dass ein Schaltantrieb (15) vorhanden ist, der ein Bauteil aufweist, das mit einer ersten Kurvenbahn (KB1) versehen ist, die dem ersten Trenner/Erder-Schalter (TE1) zugeordnet ist, und das mit einer zweiten Kurvenbahn (KB2) versehen ist, die dem zweiten Trenner/Erder-Schalter (TE2) zugeordnet ist, wobei das Bauteil von einem einzigen Antrieb antreibbar ist.Electrical switchgear (10) with a series circuit consisting of a first isolator / earthing switch (TE1), a circuit breaker (LS) and a second isolator / earthing switch (TE2), characterized in that a switching drive (15) is present, comprising a component provided with a first cam track (KB1) associated with the first disconnector / earthing switch (TE1) and provided with a second cam track (KB2) corresponding to the second disconnector / earthing switch (TE2) is assigned, wherein the component is driven by a single drive.
  2. Schaltanlage (10) nach Anspruch 1, wobei das Bauteil als eine Kurvenscheibe (24) oder als ein Kurvenzylinder (44) oder als eine Kurvenplatte (54) ausgebildet ist.Switchgear (10) according to claim 1, wherein the component as a cam plate (24) or as a cam cylinder (44) or as a cam plate (54) is formed.
  3. Schaltanlage (10) nach einem der vorstehenden Ansprüche, wobei die beiden Kurvenbahnen (KB1, KB2) jeweils als Vertiefungen ausgebildet sind, und wobei jeder der Kurvenbahnen (KB1, KB2) ein Abtaststift (AS1, AS2) zugeordnet ist, der in die zugehörige Kurvenbahn (KB1, KB2) eingreift.Switchgear (10) according to one of the preceding claims, wherein the two cam tracks (KB1, KB2) are each formed as depressions, and wherein each of the cam tracks (KB1, KB2) is associated with a scanning pin (AS1, AS2), in the associated cam track (KB1, KB2).
  4. Schaltanlage (10) nach Anspruch 2 und 3, wobei die beiden Abtaststifte (AS1, AS2) jeweils mit einer Stange (26, 28) verbunden sind, und wobei die jeweilige Stange (26, 28) durch den zugehörigen Abtaststift (AS1, AS2) translatorisch bewegbar ist.Switchgear (10) according to claim 2 and 3, wherein the two scanning pins (AS1, AS2) are each connected to a rod (26, 28), and wherein the respective rod (26, 28) is driven by the associated scanning pin (AS1, AS2). is translationally movable.
  5. Schaltanlage nach Anspruch 2 und 3, wobei die beiden Abtaststifte (AS1, AS2) jeweils mit einem Hebel (46, 48; 56, 58) verbunden sind, und wobei der jeweilige Hebel (46, 48; 56, 58) durch den zugehörigen Abtaststift (AS1, AS2) rotatorisch bewegbar ist.A switchgear according to claims 2 and 3, wherein the two sensing pins (AS1, AS2) are each connected to a lever (46, 48, 56, 58), and wherein the respective lever (46, 48, 56, 58) passes through the associated sensing pin (AS1, AS2) is rotationally movable.
  6. Schaltanlage (10) nach einem der vorstehenden Ansprüche, wobei die beiden Trenner/Erder-Schalter (TE1, TE2) jeweils drei Schaltstellungen aufweisen, und wobei von dem Bauteil beliebige Veränderungen der Schaltstellungen vorgebbar sind.Switchgear (10) according to one of the preceding claims, wherein the two isolator / earthing switches (TE1, TE2) each have three switching positions, and wherein any changes of the switching positions can be predetermined by the component.
  7. Schaltanlage (10) nach Anspruch 6, wobei von dem Antrieb unter anderem die Geschwindigkeit der Veränderungen der Schaltstellungen beeinflussbar ist.Switchgear (10) according to claim 6, wherein among other things the speed of the changes of the switching positions can be influenced by the drive.
  8. Schaltanlage (10) nach einem der vorstehenden Ansprüche, wobei die beiden Trenner/Erder-Schalter (TE1, TE2) beliebig zueinander verriegelbar sind.Switchgear (10) according to one of the preceding claims, wherein the two isolator / earthing switches (TE1, TE2) are arbitrarily lockable to each other.
  9. Schaltanlage (10) nach einem der vorstehenden Ansprüche, wobei das Bauteil von einem Elektromotor (22, 42, 52) antreibbar ist.Switchgear (10) according to one of the preceding claims, wherein the component of an electric motor (22, 42, 52) is drivable.
EP14700712.4A 2013-03-26 2014-01-17 Electrical switchgear Not-in-force EP2842145B1 (en)

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CN111463035A (en) * 2020-04-17 2020-07-28 杭州乐垚生物科技有限公司 Genetic engineering device with high safety performance and good stability
CN112490060B (en) * 2020-11-20 2023-01-10 北京清畅电力技术股份有限公司 Five-prevention interlocking device for bus side three-station switch ring main unit contact scheme
WO2023168388A1 (en) * 2022-03-03 2023-09-07 Sensata Technologies Inc. Multi-switch contactor assembly

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