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EP0721647B1 - Arrangement for controlling the switching of a power circuit breaker - Google Patents

Arrangement for controlling the switching of a power circuit breaker Download PDF

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Publication number
EP0721647B1
EP0721647B1 EP94927481A EP94927481A EP0721647B1 EP 0721647 B1 EP0721647 B1 EP 0721647B1 EP 94927481 A EP94927481 A EP 94927481A EP 94927481 A EP94927481 A EP 94927481A EP 0721647 B1 EP0721647 B1 EP 0721647B1
Authority
EP
European Patent Office
Prior art keywords
shaft
circuit breaker
coupling
state
coupling shaft
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.)
Expired - Lifetime
Application number
EP94927481A
Other languages
German (de)
French (fr)
Other versions
EP0721647A1 (en
Inventor
Marc Liebetruth
Ulrich Marquardt
Günter Prietzel
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.)
Siemens AG
Original Assignee
Siemens 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
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Publication of EP0721647A1 publication Critical patent/EP0721647A1/en
Application granted granted Critical
Publication of EP0721647B1 publication Critical patent/EP0721647B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00Mechanisms for operating contacts
    • H01H3/22Power arrangements internal to the switch for operating the driving mechanism
    • H01H3/30Power arrangements internal to the switch for operating the driving mechanism using spring motor
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00Mechanisms for operating contacts
    • H01H3/22Power arrangements internal to the switch for operating the driving mechanism
    • H01H3/30Power arrangements internal to the switch for operating the driving mechanism using spring motor
    • H01H2003/3057Power arrangements internal to the switch for operating the driving mechanism using spring motor provisions for avoiding idling, e.g. preventing release of stored energy when a breaker is closed, or when the springs are not fully charged
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00Mechanisms for operating contacts
    • H01H3/22Power arrangements internal to the switch for operating the driving mechanism
    • H01H3/30Power arrangements internal to the switch for operating the driving mechanism using spring motor
    • H01H2003/3073Indication of the charge on the spring motor

Definitions

  • a device of this type has become known from FR 1 574 048 A.
  • the operational parameters here are the switch position of the circuit breaker and the state of the energy store.
  • a switch-on command is rendered ineffective by the coupling member when the switch contacts are closed and the energy store is charged. In this way it is prevented that the switching mechanism of the circuit breaker is unnecessarily stressed by empty circuits and so-called pumps and the life of the circuit breaker is thereby adversely affected.
  • the invention has for its object to provide a device of the type described in such a way that other, for safe operation of the circuit breaker desired operational parameters can also be taken into account without the facility requiring a significantly increased effort or its reliability is impaired.
  • the coupling shaft offers an advantageous possibility to influence any influences, e.g. B. to take into account the lack of a release to be inserted as a structural unit in the circuit breaker or the lack of excitation of an undervoltage release.
  • the coupling shaft disengages the coupling member from the latching device.
  • An "ON" command regardless of whether it is given by hand or by an electromagnet, then has no effect. This state is brought to the attention of the user of the circuit breaker directly by the display element.
  • the coupling shaft can be provided with one or more sensing levers which are used to scan operational parameters occurring inside and outside the circuit breaker, these parameters being in particular "position of the switch contacts of the circuit breaker", “presence of an overcurrent release”, “switch position of at least one further circuit breaker “,” Position of the door of a circuit breaker receiving the circuit breaker "and” State of the travel drive of the circuit breaker in a rack.
  • a lack of readiness to switch on should be signaled when a trigger command is present.
  • a release half-shaft belonging to the switch-off latch has a boom and that the coupling shaft carries a steering lever which interacts with the boom in such a way that when the release half-shaft is acted upon, the clutch shaft is also rotated in the direction of release, around the coupling pin to disengage from the driver pin.
  • This arrangement ensures that all the organs provided for triggering the circuit breaker also cause the message or display "not ready to be switched on".
  • the tripping half-wave of the parameters "lack of excitation of an undervoltage release" can be supplied.
  • the aforementioned empty switching and pump prevention can be realized in a particularly simple manner in that the position of a switching shaft actuating the switching contacts can be supplied to the coupling shaft as a corresponding operational parameter, for example by means of a feeler lever of the type mentioned above , which have an insulating crossbar connecting the switch contact arrangements instead of a switching shaft, the position of the insulating crossbar can be used as a parameter.
  • the readiness for switching on of the circuit breaker can also be indicated mechanically.
  • a movement which is dependent on the position of the coupling member and on the state of the energy store can be fed to a mechanical AND element which carries or actuates the display member.
  • a signaling switch can be connected to this AND element or to the display element.
  • a parameter dependent on the state of charge of the energy store can also be supplied to the clutch shaft, the position of the clutch shaft or the clutch element controlled by it directly serving to indicate the readiness for switch-on.
  • the coupling member offers the possibility, in addition to the manual initiation of a switch-on command, also to process an "ON" command transmitted by remote control. This can be done in that the coupling member has an additional working surface which is only effective in the coupled state to initiate a parameter "state of a solenoid".
  • Parts of a circuit breaker are shown schematically in FIG. 1, while operational parameters are indicated in the form of function blocks.
  • the arrangement is in the "ready to switch on” state.
  • FIG. 2 shows the arrangement according to FIG. 1 in the “not ready to switch on” state due to closed switch contacts and an uncharged energy store.
  • the device according to FIG. 1 is also in the “not ready to switch on” state due to the undervoltage release not being energized.
  • FIG. 1 essential components of a circuit breaker 1 are shown schematically together with a number of internal and external peripheral devices.
  • a control panel 2 with a push button 3 for switching on and a push button 4 for switching off can be seen.
  • the pushbutton 3 interacts with a latching device which comprises a switch-on half-shaft 5 which is rotatably mounted in bearings (not shown) and a switch-on pawl lever 6.
  • the switch-on pawl lever 6 is arranged in the course of a mechanical power transmission which leads from an energy store 7 to a switching shaft 10 and from there to one or more switching contacts 11.
  • the pushbutton 4 controls a trip half-shaft 12, which is also rotatably mounted and on which a switch-off ratchet lever 13 is supported.
  • the switch-on half-wave 5 and the release half-wave 12 are biased into their latched position in the idle state by a tension spring 14 or 15.
  • the pushbutton 3 is connected by means of a switch-on plunger 16 to a lever carrier 17 which is movable about a fixed pivot bearing 18 and which has the function of an angle lever.
  • a coupling member 20 is also articulated by a bearing 19 and is provided with a coupling pin 21 for a driving pin 22 acting on the switch-on half-shaft 5.
  • the actuation of the release half-shaft 12 by the pushbutton 4 takes place via a switch-off plunger 24, an angle lever-like rod support 25 with a pivot bearing 26 and a drive rod 28 connected to the rod support 25 by a swivel joint 27.
  • the drive rod 28 engages with an elongated hole 29 or an equivalent one Arrangement via a driver 30 of the release half-wave 12.
  • the shown rest position of the rod carrier 25 is maintained by a tension spring 31.
  • the coupling member 20 can be actuated by a coupling shaft 32 which is mounted below and between the switch-on half-shaft 5 and the release half-shaft 12 in a fixed bearing 33.
  • the clutch shaft 32 is provided with a steering lever 34 which interacts with a boom 35 of the release half-shaft 12.
  • a feeler lever 36 of the clutch shaft 32 is biased by a tension spring 37 into its rest position shown, in which the steering lever 34 on one stationary stop 40 is present.
  • a coupling rod 41 is also articulated on the boom 36 for connection to the lever 20.
  • the coupling member 20 can thus be pivoted out of its coupling position shown in FIG. 1 by a counterclockwise rotation of the coupling shaft 32 in the direction of the arrow 23.
  • the clutch shaft 32 can be acted upon by a series of operational parameters which act as a mechanical movement in the direction of an arrow 42 shown in FIG. 1.
  • 1 shows operational parameters A, B, C, D and E which are explained below.
  • Parameter A signals the position of the selector shaft 10 and thus the position of the switch contacts 11. This feature is essential for enabling or disabling the switch-on because releasing the energy store 7 when the switch contacts 11 are closed can result in damage due to the lack of energy required by the switching mechanism .
  • Parameter B means "overcurrent release missing" and signals that the trip block essential for the protective function of the circuit breaker 1 has not been connected to the circuit breaker 1 in the intended manner and consequently the circuit breaker 1 cannot perform its protective function.
  • Parameter C contains the message of the position of other circuit breakers against which the operation of circuit breaker 1 is to be locked. This dependency can exist for one or more other circuit breakers.
  • the lock is against two further circuit breakers Q2 and Q3 are shown, the switching position of which can be fed to the coupling shaft 32.
  • the parameter D indicates the position of the switch cell door in which the circuit breaker 1 is located, which is important for the safety of the operating personnel. If the door is open, the clutch shaft 32 is also actuated.
  • the position of the circuit breaker in the slide-in carrier is also important for the decision as to whether it may be switched on or not. In intermediate positions, i.e. H. Outside the disconnected position, the test position and the operating position, it should not be possible to switch on the circuit breaker 1. In these cases too, a corresponding rotation of the coupling shaft 32 counterclockwise disengages the coupling lever 20 in the direction of arrow 23 from the switch-on half shaft 5.
  • the described parameters A and B belong to the circuit breaker 1 and are therefore "internal" parameters, while the parameters C, D and E are "external", i. H. Represent signals to be supplied from outside the circuit breaker 1. In a known manner, such signals can be supplied to the circuit breaker by linkage or cable pulls or similar means even after multiple deflections.
  • the undervoltage release acts in a suitable manner on the release half-shaft 12, the arm 35 of which actuates the clutch shaft by means of the steering lever 34 as well as one of the parameters A to E.
  • the arm 35 can be actuated by further parameters, in particular by a parameter M2, which denotes the state of a tripping magnet which is controlled by an overcurrent release.
  • the position of the coupling member 20 basically signals that the circuit breaker 1 is ready to be switched on. This property is used to take into account a further parameter S "state of excitation of the solenoid". This is done by means of a working surface 43 at the upper end of the coupling member, which only faces a plunger or other actuating element of the solenoid in the ready-to-switch-on position according to FIG. 1.
  • the state of charge L of the energy store 7 is also included in the display and, if appropriate, signaling that the circuit breaker 1 is ready to be switched on. This is done in such a way that the state of charge and the position of the clutch member 20 control the display of the readiness to switch on in the sense of an AND link.
  • FIG. 1 An example of the formation of an AND link for the readiness to switch on is shown in the upper right area of the figures.
  • a display element 47 Behind a viewing window 46 located on the partially shown front side 45 of the circuit breaker 1, a display element 47 is arranged so as to be pivotable and displaceable, which has a viewing surface 50 provided with appropriate labeling or other suitable identification.
  • the display element is attached to an actuating bar 51 projecting on both sides, the left section 52 of which with the coupling element 20 and the right one Section 53 is connected to the energy store 7 by transmission elements 54 and 55, respectively.
  • FIG. 1 shows the state "ready to switch on”, in which the transmission elements 54 and 55 are actuated in such a way that the display element 47 is pressed upwards and the visible surface 50 appears behind the window 46. Accordingly, a signaling switch 56 is also actuated and can also signal the readiness to switch on electrically.
  • FIG. 2 uses a representation corresponding to FIG. 1 to show the state that the switching contacts 11 are closed and the coupling shaft 32 is actuated by means of the parameter A.
  • the coupling member 20 is pivoted in the direction of arrow 23 and the coupling pin 21 is out of engagement with the driving pin 22. Therefore, the left section 52 of the actuating bar 51 is in the lowered idle state.
  • the right section 53 is also lowered because the energy store 7 is relaxed.
  • the display element 47 is now located below the viewing window 46.
  • FIG. 3 shows the state that the release half-wave 12 is actuated either by actuating the pushbutton 4 or by one of the parameters explained above, and as a result the clutch shaft 32 is rotated counterclockwise.
  • the coupling member 20 is therefore pivoted to the right and the coupling pin 21 is out of engagement with the driving pin 22.
  • the left transmission member 54 is deprived of support by the working surface on the coupling member 20 and the left section 52 of the actuating bar 51 is lowered.
  • the right section 53 is raised because the energy store 7 is tensioned.
  • the display element 47 thus only rotates, but does not reach the area of the viewing window 46.
  • the readiness to switch on can be directly indicated by the position of the clutch shaft 32 or the clutch element 20 if the state of charge of the energy store 7 is supplied to the feeler lever 36 as a further parameter L. This is shown in FIG. 1 by a dash-dotted line of action 57.
  • the coupling pin 21 of the coupling member 20 has only one working surface for cooperation with the driving pin 22.
  • An upper blocking surface 58 prevents the two pins from engaging in an undesired position and thereby the function of the device is disturbed.

Landscapes

  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Breakers (AREA)

Abstract

A power circuit breaker (1) is provided with an arrangement that controls its switching depending on functions' parameters (A...E, M1, M2, S). These parameters may for example be the position of switching contacts, the state of excitation of an undervoltage circuit-breaker and the switching position of another power circuit breaker. The arrangement has a coupling shaft (32) that may be rotated by a tripping half-wave by means of a steering lever (34) and by certain parameters by means of a sensor lever (36). A coupling member (20) that may be swivelled by the coupling shaft (32) allows a ratchet device (5, 6) of the energy storage (7) of the power circuit breaker (1) to be released only when all conditions required for switching are met.

Description

Die Erfindung betrifft eine Einrichtung zur Steuerung der Einschaltung eines Leistungsschalters in Abhängigkeit von wenigstens einem betrieblichen Parameter, wobei

  • der Leistungsschalter relativ zueinander bewegbare Schaltkontakte und zur Betätigung der Schaltkontakte einen Energiespeicher sowie eine Verklinkungseinrichtung besitzt, durch die der Energiespeicher im aufgeladenen Zustand verklinkbar ist und die von Hand oder ferngesteuert freigebbar ist,
  • der betriebliche Parameter sowie ein "EIN"-Befehl jeweils in der Gestalt einer mechanischen Bewegung vorliegen,
  • die Schaltkontakte aus dem geschlossenen Zustand durch Betätigung einer Auslöseverklinkung in den geöffneten Zustand überführbar sind und
    die Verklinkungseinrichtung ein Kupplungsorgan aufweist, das durch den betrieblichen Parameter beaufschlagbar ist, um den "EIN"-Befehl unwirksam zu machen.
The invention relates to a device for controlling the switching on of a circuit breaker as a function of at least one operational parameter, wherein
  • the circuit breaker has switching contacts which can be moved relative to one another and an energy storage device and a latching device for actuating the switching contacts, by means of which the energy storage device can be latched in the charged state and can be released by hand or by remote control,
  • the operational parameter and an "ON" command are each in the form of a mechanical movement,
  • the switching contacts from the closed state can be converted into the open state by actuating a release latch and
    the latching device has a coupling member which can be acted upon by the operational parameter in order to render the "ON" command ineffective.

Eine Einrichtung dieser Art ist durch die FR 1 574 048 A bekanntgeworden. Die betrieblichen Parameter sind hierbei die Schaltstellung des Leistungsschalters und der Zustand des Energiespeichers. Durch das Kupplungsorgan wird ein Einschaltbefehl unwirksam gemacht, wenn die Schaltkontakte geschlossen sind und der Energiespeicher aufgeladen ist. Auf diese Weise wird verhindert, daß die Schaltmechanik des Leistungsschalters durch Leerschaltungen und sog. Pumpen unnötig beansprucht und hierdurch die Lebensdauer des Leistungsschalters abträglich beeinflußt wird.A device of this type has become known from FR 1 574 048 A. The operational parameters here are the switch position of the circuit breaker and the state of the energy store. A switch-on command is rendered ineffective by the coupling member when the switch contacts are closed and the energy store is charged. In this way it is prevented that the switching mechanism of the circuit breaker is unnecessarily stressed by empty circuits and so-called pumps and the life of the circuit breaker is thereby adversely affected.

Der Erfindung liegt die Aufgabe zugrunde, eine Einrichtung der beschriebenen Art derart auszubilden, daß weitere, für einen sicheren Betrieb des Leistungsschalters erwünschte betriebliche Parameter gleichfalls berücksichtigt werden können, ohne daß die Einrichtung einen erheblich vergrößerten Aufwand erfordert oder ihre Zuverlässigkeit beeinträchtigt wird.The invention has for its object to provide a device of the type described in such a way that other, for safe operation of the circuit breaker desired operational parameters can also be taken into account without the facility requiring a significantly increased effort or its reliability is impaired.

Diese Aufgabe wird gemäß der Erfindung durch folgende weitere Merkmale gelöst:

  • das Kupplungsorgan ist durch eine Kupplungswelle betätigbar,
  • die Kupplungswelle ist durch den wenigstens einen betrieblichen Parameter beaufschlagbar, und
  • zur Meldung der Einschaltbereitschaft des Leistungsschalters ist in Abhängigkeit von der Stellung der Kupplungswelle ein Anzeigeorgan derart betätigbar, daß die Einschaltbereitschaft des Leistungsschalters nur bei gespanntem Energiespeicher und bei nicht betätigter Kupplungswelle signalisiert wird.
This object is achieved according to the invention by the following further features:
  • the coupling member can be actuated by a coupling shaft,
  • the clutch shaft can be acted upon by the at least one operational parameter, and
  • to signal the readiness for switching on of the circuit breaker, depending on the position of the clutch shaft, a display element can be actuated such that the readiness for switching on of the circuit breaker is only signaled when the energy store is tensioned and when the coupling shaft is not actuated.

Die Kupplungswelle bietet eine vorteilhafte Möglichkeit, beliebige Einflüsse, z. B. das Fehlen eines als Baueinheit in den Leistungsschalter einzufügenden Auslösers oder die fehlende Erregung eines Unterspannungsauslösers, zu berücksichtigen. Immer dann, wenn ein Zustand besteht, aufgrund dessen die Einschaltung des Leistungsschalters verhindert werden soll, bringt die Kupplungswelle das Kupplungsorgan mit der Verklinkungseinrichtung außer Eingriff. Ein "EIN"-Befehl, gleichgültig ob er von Hand oder durch einen Elektromagnet gegeben wird, bleibt dann wirkungslos. Dieser Zustand wird dem Benutzer des Leistungsschalters durch das Anzeigeorgan unmittelbar zur Kenntnis gebracht.The coupling shaft offers an advantageous possibility to influence any influences, e.g. B. to take into account the lack of a release to be inserted as a structural unit in the circuit breaker or the lack of excitation of an undervoltage release. Whenever there is a condition on the basis of which the circuit breaker is to be prevented from being switched on, the coupling shaft disengages the coupling member from the latching device. An "ON" command, regardless of whether it is given by hand or by an electromagnet, then has no effect. This state is brought to the attention of the user of the circuit breaker directly by the display element.

In einer vorteilhaften Ausführungsform der Erfindung kann die Einrichtung folgende Merkmale aufweisen:

  • Die Verklinkungseinrichtung weist eine Verriegelungswelle und einen mit der Verriegelungswelle verbundenen Mitnehmerzapfen auf,
  • das Kupplungsorgan weist einen um ein Schwenklager schwenkbaren Kupplungshebel auf, der mit einem den Mitnehmerzapfen erfassenden Kupplungszapfen versehen ist,
  • das Schwenklager befindet sich an einem schwenkbar gelagerten und durch einen "EIN"-Befehl betätigbaren Hebelträger, wobei eine Betätigung des Hebelträgers einer Verschiebung des Schwenklagers des Kupplungshebels im Sinne einer Drehung der Verriegelungswelle zur Freigabe des Energiespeichers entspricht und
  • der Hebel ist durch die Kupplungswelle um sein Schwenklager schwenkbar, um den Kupplungszapfen in Eingriff oder außer Eingriff mit dem Mitnehmerzapfen zu bringen.
In an advantageous embodiment of the invention, the device can have the following features:
  • The latching device has a locking shaft and a driver pin connected to the locking shaft,
  • the coupling member has a coupling lever which can be pivoted about a pivot bearing and which is provided with a coupling pin which grips the driver pin,
  • the pivot bearing is located on a pivotally mounted lever carrier which can be actuated by an "ON" command, an actuation of the lever carrier corresponding to a displacement of the pivot bearing of the clutch lever in the sense of a rotation of the locking shaft to release the energy store and
  • the lever is pivotable about its pivot bearing by the clutch shaft to engage or disengage the clutch pin from the driver pin.

Die Kupplungswelle kann mit einem oder mehreren Fühlhebeln versehen sein, die zur Abtastung innerhalb und außerhalb des Leistungsschalters anfallender betrieblicher Parameter dienen, wobei diese Parameter insbesondere sein können "Stellung der Schaltkontakte des Leistungsschalters", "Vorhandensein eines Überstromauslösers", "Schaltstellung wenigstens eines weiteren Leistungsschalters", "Stellung der Tür einer den Leistungsschalter aufnehmenden Schaltzelle" und "Zustand des Fahrantriebes des Leistungsschalters in einem Einschubträger.The coupling shaft can be provided with one or more sensing levers which are used to scan operational parameters occurring inside and outside the circuit breaker, these parameters being in particular "position of the switch contacts of the circuit breaker", "presence of an overcurrent release", "switch position of at least one further circuit breaker "," Position of the door of a circuit breaker receiving the circuit breaker "and" State of the travel drive of the circuit breaker in a rack.

In jedem Fall soll fehlende Einschaltbereitschaft signalisiert werden, wenn ein Auslösebefehl vorliegt. Dies kann dadurch erreicht werden, daß eine zu der Ausschaltverklinkung gehörende Auslöse-Halbwelle einen Ausleger besitzt und daß die Kupplungswelle einen mit dem Ausleger derart zusammenwirkenden Lenkhebel trägt, daß bei einer Beaufschlagung der Auslöse-Halbwelle im Auslösesinn auch die Kupplungswelle gedreht wird, um den Kupplungszapfen außer Eingriff mit dem Mitnehmerzapfen zu bringen. Durch diese Anordnung wird erreicht, daß alle zur Auslösung des Leistungsschalters vorgesehenen Organe zugleich auch die Meldung bzw. Anzeige "nicht einschaltbereit" bewirken. Insbesondere kann der Auslöse-Halbwelle der Parameter "fehlende Erregung eines Unterspannungsauslösers" zuführbar sein.In any case, a lack of readiness to switch on should be signaled when a trigger command is present. This can be achieved in that a release half-shaft belonging to the switch-off latch has a boom and that the coupling shaft carries a steering lever which interacts with the boom in such a way that when the release half-shaft is acted upon, the clutch shaft is also rotated in the direction of release, around the coupling pin to disengage from the driver pin. This arrangement ensures that all the organs provided for triggering the circuit breaker also cause the message or display "not ready to be switched on". In particular, the tripping half-wave of the parameters "lack of excitation of an undervoltage release" can be supplied.

In der Einrichtung nach der Erfindung ist die eingangs erwähnte Leerschalt- und Pumpverhinderung auf besonders einfache Weise dadurch zu verwirklichen, daß als entsprechender betrieblicher Parameter der Kupplungswelle die Stellung einer die Schaltkontakte betätigenden Schaltwelle zuführbar ist, beispielsweise mittels eines Fühlhebels der vorstehend erwähnten Art. Bei Leistungsschaltern, die anstelle einer Schaltwelle eine die Schaltkontaktanordnungen verbindende Isoliertraverse besitzen, kann sinngemäß die Stellung der Isoliertraverse als Parameter benutzt werden.In the device according to the invention, the aforementioned empty switching and pump prevention can be realized in a particularly simple manner in that the position of a switching shaft actuating the switching contacts can be supplied to the coupling shaft as a corresponding operational parameter, for example by means of a feeler lever of the type mentioned above , which have an insulating crossbar connecting the switch contact arrangements instead of a switching shaft, the position of the insulating crossbar can be used as a parameter.

Die Einschaltbereitschaft des Leistungsschalters kann gleichfalls mechanisch zwangsläufig angezeigt werden. Im Rahmen der Erfindung kann zur Meldung der Einschaltbereitschaft des Leistungsschalters ein von der Stellung des Kupplungsorgans und von dem Zustand des Energiespeichers abhängige Bewegung einem mechanischen UND-Glied zuführbar sein, welches das Anzeigeorgan trägt oder betätigt. Ein Meldeschalter kann mit diesem UND-Glied bzw. mit dem Anzeigeorgan verbunden sein.The readiness for switching on of the circuit breaker can also be indicated mechanically. Within the scope of the invention, to signal that the circuit breaker is ready to be switched on, a movement which is dependent on the position of the coupling member and on the state of the energy store can be fed to a mechanical AND element which carries or actuates the display member. A signaling switch can be connected to this AND element or to the display element.

Anstelle des gesonderten UND-Gliedes zur Anzeige der Einschaltbereitschaft kann ein von dem Ladezustand des Energiespeichers abhängiger Parameter gleichfalls der Kupplungswelle zugeführt werden, wobei die Stellung der Kupplungswelle bzw. des von ihr gesteuerten Kupplungsorgans direkt zur Anzeige der Einschaltbereitschaft dient.Instead of the separate AND element for indicating the readiness for switch-on, a parameter dependent on the state of charge of the energy store can also be supplied to the clutch shaft, the position of the clutch shaft or the clutch element controlled by it directly serving to indicate the readiness for switch-on.

Das Kupplungsorgan bietet die Möglichkeit, neben der manuellen Einleitung eines Einschaltbefehls auch einen durch Fernbedienung übertragenen "EIN"-Befehl zu verarbeiten. Dies kann dadurch geschehen, daß das Kupplungsorgan eine zusätzliche, nur im gekuppelten Zustand wirksame Arbeitsfläche zur Einleitung eines Parameters "Zustand eines Abrufmagneten" besitzt.The coupling member offers the possibility, in addition to the manual initiation of a switch-on command, also to process an "ON" command transmitted by remote control. This can be done in that the coupling member has an additional working surface which is only effective in the coupled state to initiate a parameter "state of a solenoid".

Die Erfindung wird im folgenden anhand des in den Figuren dargestellten Ausführungsbeispieles näher erläutert.The invention is explained below with reference to the embodiment shown in the figures.

In der Figur 1 sind schematisch Teile eines Leistungsschalter dargestellt, während betriebliche Parameter in Form von Funktionsblöcken angedeutet sind. Die Anordnung befindet sich im Zustand "einschaltbereit".Parts of a circuit breaker are shown schematically in FIG. 1, while operational parameters are indicated in the form of function blocks. The arrangement is in the "ready to switch on" state.

Die Figur 2 zeigt die Anordnung gemäß der Figur 1 im Zustand "nicht einschaltbereit" infolge geschlossener Schaltkontakte und nicht aufgeladenen Energiespeichers.FIG. 2 shows the arrangement according to FIG. 1 in the “not ready to switch on” state due to closed switch contacts and an uncharged energy store.

In der Figur 3 ist die Einrichtung gemäß der Figur 1 gleichfalls im Zustand "nicht einschaltbereit" infolge fehlender Erregung des Unterspannungsauslösers.In FIG. 3, the device according to FIG. 1 is also in the “not ready to switch on” state due to the undervoltage release not being energized.

In der Figur 1 sind schematisch wesentliche Komponenten eines Leistungsschalters 1 zusammen mit einer Anzahl interner und externer peripherer Geräte dargegestellt. Erkennbar sind insbesondere ein Bedienungspult 2 mit einem Drucktaster 3 zum Einschalten und einem Drucktaster 4 zum Ausschalten. Der Drucktaster 3 wirkt mit einer Verklinkungseinrichtung zusammen, die eine in nicht gezeigten Lagern drehbar gelagerte Einschalt-Halbwelle 5 und einen Einschalt-Klinkenhebel 6 umfaßt. Der Einschalt-Klinkenhebel 6 ist im Zuge einer mechanischen Kraftübertragung angeordnet, die von einem Energiespeicher 7 zu einer Schaltwelle 10 und von dort zu einem oder mehreren Schaltkontakten 11 führt.In Figure 1, essential components of a circuit breaker 1 are shown schematically together with a number of internal and external peripheral devices. In particular, a control panel 2 with a push button 3 for switching on and a push button 4 for switching off can be seen. The pushbutton 3 interacts with a latching device which comprises a switch-on half-shaft 5 which is rotatably mounted in bearings (not shown) and a switch-on pawl lever 6. The switch-on pawl lever 6 is arranged in the course of a mechanical power transmission which leads from an energy store 7 to a switching shaft 10 and from there to one or more switching contacts 11.

Der Drucktaster 4 steuert eine gleichfalls drehbar gelagerte Auslöse-Halbwelle 12, an der ein Ausschalt-Klinkenhebel 13 abgestützt ist. Die Einschalt-Halbwelle 5 sowie die Auslöse-Halbwelle 12 sind im Ruhezustand durch eine Zugfeder 14 bzw. 15 in ihre Verklinkungsstellung vorgespannt.The pushbutton 4 controls a trip half-shaft 12, which is also rotatably mounted and on which a switch-off ratchet lever 13 is supported. The switch-on half-wave 5 and the release half-wave 12 are biased into their latched position in the idle state by a tension spring 14 or 15.

Der Drucktaster 3 steht mittels eines Einschaltstößels 16 mit einem Hebelträger 17 in Verbindung, der um ein ortsfestes Schwenklager 18 beweglich ist und der die Funktion eines Winkelhebels hat. An dem Hebelträger 17 ist ferner durch ein Lager 19 ein Kupplungsorgan 20 gelenkig angebracht, das mit einem Kupplungszapfen 21 für einen auf die Einschalt-Halbwelle 5 wirkenden Mitnehmerzapfen 22 versehen ist. Durch eine Schwenkung des hebelartigen Kupplungsorgans 20 in einer noch zu beschreibenden Weise um sein an dem Hebelträger 17 befindliches Lager 19 kann der Kupplungszapfen 21 aus der in der Figur 1 gezeigten Stellung herausgeschwenkt und hierdurch der Kupplungszapfen 21 außer Eingriff mit dem Mitnehmerzapfen 22 gebracht werden. Das Kupplungsorgan 20 gestattet eine Drehung der Einschalt-Halbwelle 5 nur in der Stellung gemäß der Figur 1. Wird das Kupplungsorgan 20 in Richtung des Pfeiles 23 um sein Lager 19 geschwenkt, so bleibt eine Betätigung des Drucktasters 3 ohne Wirkung.The pushbutton 3 is connected by means of a switch-on plunger 16 to a lever carrier 17 which is movable about a fixed pivot bearing 18 and which has the function of an angle lever. On the lever bracket 17, a coupling member 20 is also articulated by a bearing 19 and is provided with a coupling pin 21 for a driving pin 22 acting on the switch-on half-shaft 5. By pivoting the lever-like coupling member 20 in a manner yet to be described, about its bearing 19 located on the lever support 17, the coupling pin 21 can be pivoted out of the position shown in FIG. 1 and the coupling pin 21 can thereby be disengaged from the driving pin 22. The coupling member 20 permits rotation of the switch-on half-shaft 5 only in the position according to FIG. 1. If the coupling member 20 is pivoted about its bearing 19 in the direction of arrow 23, actuation of the pushbutton 3 has no effect.

Die Betätigung der Auslöse-Halbwelle 12 durch den Drucktaster 4 erfolgt über einen Ausschaltstößel 24, einen winkelhebelartigen Stangenträger 25 mit einem Schwenklager 26 und einer mit dem Stangenträger 25 durch ein Drehgelenk 27 verbundenen Mitnehmerstange 28. Die Mitnehmerstange 28 greift mit einem Langloch 29 oder einer gleichwirkenden Anordnung über einen Mitnehmer 30 der Auslöse-Halbwelle 12. Durch eine Zugfeder 31 wird die gezeigte Ruhelage des Stangenträgers 25 aufrechterhalten.The actuation of the release half-shaft 12 by the pushbutton 4 takes place via a switch-off plunger 24, an angle lever-like rod support 25 with a pivot bearing 26 and a drive rod 28 connected to the rod support 25 by a swivel joint 27. The drive rod 28 engages with an elongated hole 29 or an equivalent one Arrangement via a driver 30 of the release half-wave 12. The shown rest position of the rod carrier 25 is maintained by a tension spring 31.

Das Kupplungsorgan 20 ist durch eine Kupplungswelle 32 betätigbar, die unterhalb und zwischen der Einschalt-Halbwelle 5 und der Auslöse-Halbwelle 12 in einem ortsfesten Lager 33 gelagert ist. Die Kupplungswelle 32 ist mit einem Lenkhebel 34 versehen, der mit einem Ausleger 35 der Auslöse-Halbwelle 12 zusammenwirkt. Ein Fühlhebel 36 der Kupplungswelle 32 wird durch eine Zugfeder 37 in seine dargestellte Ruhelage vorgespannt, in der der Lenkhebel 34 an einem ortsfesten Anschlag 40 anliegt. An dem Ausleger 36 ist ferner eine Kuppelstange 41 zur Verbindung mit dem Hebel 20 angelenkt. Das Kupplungsorgan 20 ist somit aus seiner in der Figur 1 gezeigten Kupplungsstellung durch eine entgegen dem Uhrzeigersinn erfolgende Drehung der Kupplungswelle 32 in der Richtung des Pfeiles 23 herausschwenkbar. Durch eine etwa rechtwinklig zu dem Kupplungsorgan 20 verlaufende Anordnung der Kuppelstange 41 ist dafür gesorgt, daß eine Verschiebung des Kupplungsorgans 20 mittels des Drucktasters 3 und des Hebelträgers 17 ohne Behinderung erfolgen kann.The coupling member 20 can be actuated by a coupling shaft 32 which is mounted below and between the switch-on half-shaft 5 and the release half-shaft 12 in a fixed bearing 33. The clutch shaft 32 is provided with a steering lever 34 which interacts with a boom 35 of the release half-shaft 12. A feeler lever 36 of the clutch shaft 32 is biased by a tension spring 37 into its rest position shown, in which the steering lever 34 on one stationary stop 40 is present. A coupling rod 41 is also articulated on the boom 36 for connection to the lever 20. The coupling member 20 can thus be pivoted out of its coupling position shown in FIG. 1 by a counterclockwise rotation of the coupling shaft 32 in the direction of the arrow 23. By arranging the coupling rod 41 approximately at right angles to the coupling member 20, it is ensured that the coupling member 20 can be displaced by means of the pushbutton 3 and the lever support 17 without hindrance.

Die Kupplungswelle 32 ist durch eine Reihe von betrieblichen Parametern beaufschlagbar, die als mechanische Bewegung in der Richtung eines in der Figur 1 gezeigten Pfeiles 42 wirken. In der Figur 1 sind betriebliche Parameter A, B, C, D und E gezeigt die im folgenden erläutert werden.The clutch shaft 32 can be acted upon by a series of operational parameters which act as a mechanical movement in the direction of an arrow 42 shown in FIG. 1. 1 shows operational parameters A, B, C, D and E which are explained below.

Der Parameter A signalisiert die Stellung der Schaltwelle 10 und damit die Stellung der Schaltkontakte 11. Dieses Merkmal ist wesentlich für die Freigabe bzw. Sperrung der Einschaltung, weil eine Freigabe des Energiespeichers 7 bei geschlossenen Schaltkontakten 11 wegen des fehlenden Energiebedarfes der Schaltmechanik zu Schäden führen kann.Parameter A signals the position of the selector shaft 10 and thus the position of the switch contacts 11. This feature is essential for enabling or disabling the switch-on because releasing the energy store 7 when the switch contacts 11 are closed can result in damage due to the lack of energy required by the switching mechanism .

Parameter B bedeutet "Überstromauslöser fehlt" und signalisiert, daß der für die Schutzfunktion des Leistungsschalters 1 wesentliche Auslöserblock nicht in der vorgesehenen Weise mit dem Leistungsschalter 1 verbunden worden ist und dieser demzufolge seine Schutzfunktion nicht ausüben kann.Parameter B means "overcurrent release missing" and signals that the trip block essential for the protective function of the circuit breaker 1 has not been connected to the circuit breaker 1 in the intended manner and consequently the circuit breaker 1 cannot perform its protective function.

Der Parameter C beinhaltet die Meldung der Stellung anderer Leistungsschalter, gegenüber denen die Bedienung des Leistungsschalters 1 verriegelt werden soll. Diese Abhängigkeit kann für einen oder mehrere weitere Leistungsschalter bestehen. In der Figur 1 ist die Verriegelung gegen zwei weitere Leistungsschalter Q2 und Q3 gezeigt, deren Schaltstellung der Kupplungswelle 32 zuführbar sind.Parameter C contains the message of the position of other circuit breakers against which the operation of circuit breaker 1 is to be locked. This dependency can exist for one or more other circuit breakers. In Figure 1, the lock is against two further circuit breakers Q2 and Q3 are shown, the switching position of which can be fed to the coupling shaft 32.

Die für die Sicherheit des Bedienungspersonals wichtige Stellung der Tür der Schaltzelle, in der sich der Leistungsschalter 1 befindet, wird durch den Parameter D gemeldet. Ist die Tür offen, wird gleichfalls die Kupplungswelle 32 betätigt.The parameter D indicates the position of the switch cell door in which the circuit breaker 1 is located, which is important for the safety of the operating personnel. If the door is open, the clutch shaft 32 is also actuated.

Ist der Leistungsschalter auf eine Einschub verschiebbar angeordnet, so ist für die Entscheidung, ob eingeschaltet werden darf oder nicht, auch die Stellung des Leistungsschalters in dem Einschubträger wesentlich. In Zwischenstellungen, d. h. außerhalb der Trennstellung, der Teststellung und der Betriebsstellung soll es nicht möglich sein, den Leistungsschalter 1 einzuschalten. Auch in diesen Fällen wird durch eine entsprechende Drehung der Kupplungswelle 32 entgegen dem Uhrzeigersinn der Kupplungshebel 20 in Richtung des Pfeiles 23 von der Einschalthalbwelle 5 entkuppelt.If the circuit breaker is arranged to be displaceable on a slide-in unit, the position of the circuit breaker in the slide-in carrier is also important for the decision as to whether it may be switched on or not. In intermediate positions, i.e. H. Outside the disconnected position, the test position and the operating position, it should not be possible to switch on the circuit breaker 1. In these cases too, a corresponding rotation of the coupling shaft 32 counterclockwise disengages the coupling lever 20 in the direction of arrow 23 from the switch-on half shaft 5.

Die beschriebenen Parameter A und B gehören zu dem Leistungsschalter 1 und sind daher "interne" Parameter, während die Parameter C, D und E "externe", d. h. von außerhalb dem Leistungsschalter 1 zuzuführende Signale darstellen. In bekannter Weise können derartige Signale durch Gestänge bzw. Seilzüge oder ähnliche Mittel auch nach mehrfacher Umlenkung dem Leistungsschalter zugeführt werden.The described parameters A and B belong to the circuit breaker 1 and are therefore "internal" parameters, while the parameters C, D and E are "external", i. H. Represent signals to be supplied from outside the circuit breaker 1. In a known manner, such signals can be supplied to the circuit breaker by linkage or cable pulls or similar means even after multiple deflections.

Neben den vorstehend erläuterten Parametern gibt es weitere Parameter, die eine zusätzliche Funktion an sich zur Auslösung des Leistungsschalters dienender Vorrichtungen darstellen. Insbesondere gilt dies für einen in der Regel vorgesehenen Unterspannungsauslöser. Ist dieser nicht erregt, weil eine ausreichende Spannung nicht besteht, so kann der Leistungsschalter nicht eingeschaltet werden. Der in den Figuren gezeigte Parameter M1 "Zustand des Unterspannungsauslösers" soll dann die Anzeige "nicht einschaltbereit" bewirken. Hierzu beaufschlagt der Unterspannungsauslöser in geeigneter Weise die Auslöse-Halbwelle 12, deren Ausleger 35 mittels des Lenkhebels 34 die Kupplungswelle ebenso betätigt wie einer der Parameter A bis E. Außerdem ist der Ausleger 35 durch weitere Parameter zu betätigen, insbesondere durch einen Parameter M2, der den Zustand eines Auslösemagneten bezeichnet, der durch einen Überstromauslöser angesteuert wird.In addition to the parameters explained above, there are further parameters which represent an additional function per se for triggering the circuit breaker of devices. This applies in particular to an undervoltage release that is usually provided. If this is not energized because there is insufficient voltage, the circuit breaker cannot be closed. The parameter M1 "state of the undervoltage release" shown in the figures should then cause the display "not ready to switch on". For this purpose, the undervoltage release acts in a suitable manner on the release half-shaft 12, the arm 35 of which actuates the clutch shaft by means of the steering lever 34 as well as one of the parameters A to E. In addition, the arm 35 can be actuated by further parameters, in particular by a parameter M2, which denotes the state of a tripping magnet which is controlled by an overcurrent release.

Die Stellung des Kupplungsorgans 20 signalisiert grundsätzlich die Einschaltbereitschaft des Leistungsschalters 1. Diese Eigenschaft wird benutzt, um einen weiteren Parameter S "Zustand der Erregung des Abrufmagneten" zu berücksichtigen. Dies geschieht mittels einer Arbeitsfläche 43 am oberen Ende des Kupplungsorgans, die einem Stößel oder sonstigen Betätigungsglied des Abrufmagneten nur in der einschaltbereiten Stellung gemäß der Figur 1 gegenübersteht.The position of the coupling member 20 basically signals that the circuit breaker 1 is ready to be switched on. This property is used to take into account a further parameter S "state of excitation of the solenoid". This is done by means of a working surface 43 at the upper end of the coupling member, which only faces a plunger or other actuating element of the solenoid in the ready-to-switch-on position according to FIG. 1.

In die Anzeige und ggfs. Signalisierung der Einschaltbereitschaft des Leistungsschalters 1 wird neben dem vorgenannten Parametern A...E sowie M1 und M2 noch der Ladezustand L des Energiespeichers 7 einbezogen. Dies geschieht in der Weise, daß der Ladezustand und die Stellung des Kupplungsorgans 20 im Sinne einer UND-Verknüpfung die Anzeige der Einschaltbereitschaft steuern.In addition to the aforementioned parameters A ... E and M1 and M2, the state of charge L of the energy store 7 is also included in the display and, if appropriate, signaling that the circuit breaker 1 is ready to be switched on. This is done in such a way that the state of charge and the position of the clutch member 20 control the display of the readiness to switch on in the sense of an AND link.

Ein Beispiel für die Ausbildung einer UND-Verknüpfung für die Einschaltbereitschaftsanzeige ist im rechten oberen Bereich der Figuren gezeigt. Hinter einem an der teilweise gezeigten Frontseite 45 des Leistungsschalters 1 gelegenen Sichtfenster 46 ist schwenk- und verschiebbar ein Anzeigeorgan 47 angeordnet, das eine mit einer entsprechenden Beschriftung oder sonstigen geeigneten Kennzeichnung versehene Sichtfläche 50 besitzt. Das Anzeigeorgan ist an einem beidseitig überstehenden Betätigungsbalken 51 befestigt, dessen linkes Teilstück 52 mit dem Kupplungsorgan 20 und deren rechtes Teilstück 53 mit dem Energiespeicher 7 durch Übertragungsglieder 54 bzw. 55 in Verbindung steht.An example of the formation of an AND link for the readiness to switch on is shown in the upper right area of the figures. Behind a viewing window 46 located on the partially shown front side 45 of the circuit breaker 1, a display element 47 is arranged so as to be pivotable and displaceable, which has a viewing surface 50 provided with appropriate labeling or other suitable identification. The display element is attached to an actuating bar 51 projecting on both sides, the left section 52 of which with the coupling element 20 and the right one Section 53 is connected to the energy store 7 by transmission elements 54 and 55, respectively.

In der Figur 1 ist der Zustand "einschaltbereit" gezeigt, in welchem die Übertragungsglieder 54 und 55 derart betätigt sind, daß das Anzeigeorgan 47 nach oben gedrückt ist und dadurch die Sichtfläche 50 hinter dem Sichtfenster 46 erscheint. Ein Meldeschalter 56 ist dementsprechend ebenfalls betätigt und vermag die Einschaltbereitschaft auch elektrisch zu signalisieren.1 shows the state "ready to switch on", in which the transmission elements 54 and 55 are actuated in such a way that the display element 47 is pressed upwards and the visible surface 50 appears behind the window 46. Accordingly, a signaling switch 56 is also actuated and can also signal the readiness to switch on electrically.

Die Figur 2 zeigt anhand einer der Figur 1 entsprechenden Darstellung den Zustand, daß die Schaltkontakte 11 geschlossen sind und mittels des Parameters A die Kupplungswelle 32 betätigt ist. Durch die Kuppelstange 41 ist das Kupplungsorgan 20 in Richtung des Pfeils 23 geschwenkt und der Kupplungszapfen 21 steht außer Eingriff mit dem Mitnehmerzapfen 22. Daher befindet sich das linke Teilstück 52 des Betätigungsbalkens 51 im abgesenkten Ruhezustand. Das rechte Teilstück 53 ist ebenfalls abgesenkt, weil der Energiespeicher 7 entspannt ist. Das Anzeigeorgan 47 befindet sich nun unterhalb des Sichtfensters 46.FIG. 2 uses a representation corresponding to FIG. 1 to show the state that the switching contacts 11 are closed and the coupling shaft 32 is actuated by means of the parameter A. Through the coupling rod 41, the coupling member 20 is pivoted in the direction of arrow 23 and the coupling pin 21 is out of engagement with the driving pin 22. Therefore, the left section 52 of the actuating bar 51 is in the lowered idle state. The right section 53 is also lowered because the energy store 7 is relaxed. The display element 47 is now located below the viewing window 46.

In der Figur 3 ist der Zustand gezeigt, daß die Auslöse-Halbwelle 12 entweder durch Betätigen des Drucktasters 4 oder durch einen der vorstehend erläuterten Parameter betätigt und hierdurch die Kupplungswelle 32 entgegen dem Uhrzeigersinn gedreht ist. Das Kupplungsorgan 20 ist daher nach rechts geschwenkt und der Kupplungszapfen 21 steht außer Eingriff mit dem Mitnehmerzapfen 22. Hierdurch ist dem linken Übertragungsglied 54 die Unterstützung durch die Arbeitsfläche am Kupplungsorgan 20 entzogen und das linke Teilstück 52 des Betätigungsbalkens 51 ist abgesenkt. Dagegen ist das rechte Teilstück 53 angehoben, weil der Energiespeicher 7 gespannt ist. Das Anzeigeorgan 47 führt somit nur eine Drehung aus, gelangt jedoch nicht in den Bereich des Sichtfensters 46.FIG. 3 shows the state that the release half-wave 12 is actuated either by actuating the pushbutton 4 or by one of the parameters explained above, and as a result the clutch shaft 32 is rotated counterclockwise. The coupling member 20 is therefore pivoted to the right and the coupling pin 21 is out of engagement with the driving pin 22. As a result, the left transmission member 54 is deprived of support by the working surface on the coupling member 20 and the left section 52 of the actuating bar 51 is lowered. In contrast, the right section 53 is raised because the energy store 7 is tensioned. The display element 47 thus only rotates, but does not reach the area of the viewing window 46.

Anstelle der beschriebenen gesonderten UND-Verknüpfung im Bereich des Anzeigeorgans 47 kann eine direkte Anzeige der Einschaltbereitschaft durch die Stellung der Kupplungswelle 32 bzw. des Kupplungsorgans 20 erfolgen, wenn der Ladezustand des Energiespeichers 7 als weiterer Parameter L dem Fühlhebel 36 zugeführt wird. Dies ist in der Figur 1 durch eine strichpunktierte Wirkungslinie 57 dargestellt.Instead of the separate AND link described in the area of the display element 47, the readiness to switch on can be directly indicated by the position of the clutch shaft 32 or the clutch element 20 if the state of charge of the energy store 7 is supplied to the feeler lever 36 as a further parameter L. This is shown in FIG. 1 by a dash-dotted line of action 57.

Wie die Figuren noch zeigen, besitzt der Kupplungszapfen 21 des Kupplungsorgans 20 nur eine Arbeitsfläche für das Zusammenwirken mit dem Mitnehmerzapfen 22. Durch eine obere Sperrfläche 58 wird vermieden, daß die beiden Zapfen in einer unerwünschten Stellung in Eingriff gelangen können und hierdurch die Funktion der Einrichtung gestört wird.As the figures show, the coupling pin 21 of the coupling member 20 has only one working surface for cooperation with the driving pin 22. An upper blocking surface 58 prevents the two pins from engaging in an undesired position and thereby the function of the device is disturbed.

Claims (9)

  1. System for controlling closing of a power circuit breaker (1) in dependence on at least one operating parameter (A...E, M1, M2), wherein
    - the circuit breaker (1) has switch contacts (11) which are movable relative to one another and has, for operation of the switch contacts (11), an energy storage mechanism (7) and a latching mechanism (5, 6) by which the energy storage mechanism can be latched in the charged-up state and which can be cleared manually or by remote control,
    - the operating parameters (A...E, M1, M2) and also an ON command are each present in the form of a mechanical movement, and
    - the switch contacts (11) can be changed over from the closed state into the open state by operation of a tripping device (12, 13),
    - the latching mechanism (5, 6) includes a coupling element (20) which can be acted on by the operating parameters (A...E, M1, M2) in order to disable the ON command,
    characterised by the following features:
    - the coupling element (20) is actuatable by means of a coupling shaft (32),
    - the coupling shaft (32) can be acted on by the at least one operating parameter (A...E, M1, M2),
    - to indicate availability of the circuit breaker (1), an indicating element (47) is actuatable, in dependence on the position of the coupling shaft (32), in such a way that availability of the circuit breaker (1) is only signalled when the energy storage mechanism (7) is charged up and the coupling shaft (32) is not actuated.
  2. System according to claim 1,
    characterised by the following features:
    - the latching mechanism (5, 6) includes a closing half-shaft (5) and a driver pin (22) connected to the closing half-shaft (5),
    - the coupling element (20) is movable about a pivot bearing (19) and is provided with a coupling pin (21) which intercepts the driver pin (22),
    - the pivot bearing (19) is located on a lever carrier (17) which is pivotally mounted and is actuatable by an ON command, such that actuation of the lever carrier (17) corresponds to displacement of the pivot bearing (19) of the coupling element (20) in the sense of a rotation of the closing half-shaft (5) to clear the energy storage mechanism (7), and
    - the coupling element (20) is pivotable about its pivot bearing (19) by the coupling shaft (32), in order to bring the coupling pin (21) into or out of engagement with the driver pin (22).
  3. System according to claim 1 or claim 2,
    characterised in that
    the coupling shaft (32) is provided with at least one feeler lever (36) to detect operating parameters (A...E) arising inside and outside the circuit breaker (1), these parameters being in particular
    A: "Position of the switch contacts",
    B: "Presence of an overcurrent trip",
    C: "Switch position of at least one other circuit breaker",
    D: "Position of the door of a switchgear cubicle housing the circuit breaker (1)", and
    E: "Condition of the travel drive of the circuit breaker in a pull-out carrier".
  4. System according to claim 3,
    characterised in that a tripping half-shaft (12) forming part of the tripping device (12, 13) is provided with a cross-arm (35) and that the coupling shaft (32) carries a rocker arm (34) cooperating with the cross-arm (35) in such a way that when the tripping half-shaft (12) is acted on in the tripping sense the coupling shaft (32) is rotated for actuation of the coupling element (20) in order to bring the coupling pin (21) out of engagement with the driver pin (22).
  5. System according to claim 4,
    characterised in that at least one further operating parameter (M1), in particular "State of excitation of an undervoltage trip", can be supplied to the tripping half-shaft (12).
  6. Device according to claim 3,
    characterised in that to provide a way of preventing no-voltage switching and pumping, the position of a switching shaft (10) actuating the switch contacts (11) can be supplied to the coupling shaft (32) as an operating parameter.
  7. System according to any preceding claim,
    characterised in that to indicate the availability of the circuit breaker (1) a movement dependent on the position of the coupling element (20) and on the state of the energy storage mechanism (7) can be supplied to a mechanical AND member which carries or actuates the indicating element(47).
  8. System according to any preceding claim, characterised in that a parameter (L) dependent on the state of charge of the energy storage mechanism (7) can likewise be supplied to the coupling shaft (32) and that the position of the coupling shaft (32) or of the coupling element (20) controlled by it serves directly as indication of the availability.
  9. System according to any preceding claim,
    characterised in that the coupling element (20) is provided with an additional bearing surface (43), only effective in the coupled state, for input of a parameter "State of a calling magnet" (S).
EP94927481A 1993-09-30 1994-09-16 Arrangement for controlling the switching of a power circuit breaker Expired - Lifetime EP0721647B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4333828 1993-09-30
DE4333828A DE4333828C1 (en) 1993-09-30 1993-09-30 Device for controlling the opening of a circuit breaker
PCT/DE1994/001108 WO1995009429A1 (en) 1993-09-30 1994-09-16 Arrangement for controlling the switching of a power circuit breaker

Publications (2)

Publication Number Publication Date
EP0721647A1 EP0721647A1 (en) 1996-07-17
EP0721647B1 true EP0721647B1 (en) 1997-05-14

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Family Applications (1)

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EP94927481A Expired - Lifetime EP0721647B1 (en) 1993-09-30 1994-09-16 Arrangement for controlling the switching of a power circuit breaker

Country Status (5)

Country Link
US (1) US5661627A (en)
EP (1) EP0721647B1 (en)
JP (1) JP3461508B2 (en)
DE (2) DE4333828C1 (en)
WO (1) WO1995009429A1 (en)

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Also Published As

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US5661627A (en) 1997-08-26
JPH09503613A (en) 1997-04-08
DE4333828C1 (en) 1995-03-09
JP3461508B2 (en) 2003-10-27
WO1995009429A1 (en) 1995-04-06
EP0721647A1 (en) 1996-07-17
DE59402779D1 (en) 1997-06-19

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