WO1999038178A1 - Clamping device for an energy accumulator in a low-voltage power breaker - Google Patents
Clamping device for an energy accumulator in a low-voltage power breaker Download PDFInfo
- Publication number
- WO1999038178A1 WO1999038178A1 PCT/DE1999/000179 DE9900179W WO9938178A1 WO 1999038178 A1 WO1999038178 A1 WO 1999038178A1 DE 9900179 W DE9900179 W DE 9900179W WO 9938178 A1 WO9938178 A1 WO 9938178A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- ratchet wheel
- tensioning
- energy accumulator
- lever
- clamping device
- Prior art date
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
- H01H3/30—Power arrangements internal to the switch for operating the driving mechanism using spring motor
- H01H3/3005—Charging means
- H01H3/3021—Charging means using unidirectional coupling
Definitions
- the invention relates to a tensioning device for an energy storage device of a low-voltage circuit breaker with a ratchet wheel which is seated on a tensioning shaft and which can be rotated step by step in a direction of rotation by means of a transport pawl which can be actuated by a tensioning lever.
- the ratchet wheel tensions the clamping device during its rotary movement via a lever drive until it is blocked by a blocking device which can be released for switching, the reverse rotation being prevented by a pawl when the ratchet wheel is clamped.
- the energy store can be, for example, a compression or tension spring or a group of compression or tension springs.
- the tensioning lever is operated either by motor or by hand.
- Such a tensioning device is e.g. B. from DE 35 41 093 AI known.
- the blocking device is implemented here by a blocking lever engaging in the cams of a cam wheel, the cam wheel also being located on the tensioning shaft and being coupled to the ratchet wheel.
- the blocking lever engages in the cam wheel in the sense of a lock on.
- the lock can then be released via a further lever when the switching process is triggered.
- the ratchet drive is mechanically decoupled from the ratchet wheel. This is done by a pin arranged on the transport pawl, which is carried by the blocking lever and moves the transport pawl out of engagement with the toothing of the ratchet wheel.
- Transport pawl decoupled from the ratchet wheel in that a control disk connected to the ratchet wheel acts on a spring-loaded control pin mounted in a guide, which is pushed radially outward when the tensioning position is reached by the control curve of the control disk and with its rear end emerging from the guide, the transport pawl from the toothing of the ratchet wheel.
- the invention is therefore based on the object of providing a tensioning device of the type mentioned at the outset, which is of simple construction and with which the functional reliability of the switch can be increased further.
- the invention has the advantage that the tensioning device manages with a few, easy-to-manufacture individual parts and that the uncomplicated operation increases the switching reliability of the switch by arranging a control disk which moves with the ratchet wheel on the tensioning shaft and which over most of it its circumference has a concentric contour and over the remaining part of its circumference has a nose protruding beyond the concentric contour and the transport pawl has a control pin which is brought into contact with the control disk.
- a tensioning lever 2 rotatably mounted on a tensioning shaft 1 carries a transport pawl 4 which can be rotated on an axis 3.
- the transport pawl 4 is in engagement with a ratchet wheel 5 and rotates this when the tensioning lever 2 is actuated step by step indicated arrow direction, an energy storage device, for. B. a compression spring is tensioned.
- a pawl 7 rotatably mounted on a base plate 6 prevents the ratchet wheel 5 from rotating backwards. 4
- the clamping lever 2 can be operated by a hand lever 8 or also by a motor drive, not shown in the figures.
- the tensioning lever 2 is operated until the likewise not shown here, for. B. trained as a toggle lever drive, has just exceeded its dead center.
- the energy storage is designed so that it assumes the state of maximum energy storage in this position, i.e. that e.g. B. a compression spring is largely compressed in this position.
- a blocking device becomes effective in this position, which is released when a switching operation is triggered.
- the switching contacts of the circuit breaker are actuated when the switching process is triggered by the tensioning shaft 1, which is strongly accelerated by the energy store in the direction of rotation shown.
- a fixed connection with the ratchet wheel 5 is a control disk 9 which, when the ratchet wheel 5 has reached the tensioned position, acts on a control pin 11 on the transport pawl 4 with a molded nose 10 and thus moves the transport pawl 4 out of the toothing of the ratchet wheel 5.
- a further rotation of the ratchet wheel 5 by actuating the tensioning lever 2 is therefore no longer possible.
- the nose 10 has such a dimension that when the ratchet wheel 5 is rotated further by approximately 20 °, the transport pawl 4, expediently under the action of a return spring, returns to the 5
- the nose 10 is one on the otherwise provided concentric contour recessed undercut 12, in which the control pin 11, as shown in Figure 2, can intervene unhindered.
Landscapes
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
- Lock And Its Accessories (AREA)
Abstract
The invention relates to a clamping device for an energy accumulator in a low-voltage power breaker. Clamping occurs in the inventive device by means of a ratchet wheel which is actuated by a catch. The ratchet wheel is joined to an energy accumulator such as a pressure spring. In order to prevent any further force from being exerted by a motor drive or hand-lever driver on the ratchet wheel once sufficient clamping has occurred, the catch drive is mechanically decoupled from the ratchet wheel. Previous systems were mechanically complicated and unreliable during operation. According to the invention, a control disk (9) that moves with the ratchet wheel (5) is mounted on the clamp shaft (1). The greater part of the periphery of said disk forms a concentric contour. In the remaining part of said periphery, a lug (10) protrudes above the concentric contour and the catch (4) has a control pin (11) arranged in such a way that it rests upon the control disk (9).
Description
Beschreibungdescription
Spanneinrichtung für einen Energiespeicher eines Niederspannungs-LeistungsschaltersClamping device for an energy storage device of a low-voltage circuit breaker
Die Erfindung betrifft eine Spanneinrichtung für einen Energiespeicher eines Niederspannungs-Leistungsschalters mit einem mittels einer durch einen Spannhebel betätigbaren Transportklinke schrittweise in einer Drehrichtung zu drehenden, auf einer Spannwelle sitzenden Klinkenrad. Das Klinkenrad spannt bei seiner Drehbewegung über einen Hebelantrieb die Spanneinrichtung bis zur Sperrung durch eine zum Schalten lösbare Blockiereinrichtung, wobei die Rückwärtsdrehung beim Spannen des Klinkenrades durch eine Sperrklinke verhindert wird. Der Energiespeicher kann dabei beispielsweise eine Druck- oder Zugfeder oder eine Gruppe von Druck- oder Zugfedern sein. Der Spannhebel wird entweder motorisch oder von Hand betätigt.The invention relates to a tensioning device for an energy storage device of a low-voltage circuit breaker with a ratchet wheel which is seated on a tensioning shaft and which can be rotated step by step in a direction of rotation by means of a transport pawl which can be actuated by a tensioning lever. The ratchet wheel tensions the clamping device during its rotary movement via a lever drive until it is blocked by a blocking device which can be released for switching, the reverse rotation being prevented by a pawl when the ratchet wheel is clamped. The energy store can be, for example, a compression or tension spring or a group of compression or tension springs. The tensioning lever is operated either by motor or by hand.
Eine solche Spanneinrichtung ist z. B. aus der DE 35 41 093 AI bekannt. Die Blockiereinrichtung wird hierbei durch einen in die Nocken eines Nockenrades eingreifenden Blockierhebel realisiert, wobei sich das Nockenrad ebenfalls auf der Spannwelle befindet und mit dem Klinkenrad gekoppelt ist.Such a tensioning device is e.g. B. from DE 35 41 093 AI known. The blocking device is implemented here by a blocking lever engaging in the cams of a cam wheel, the cam wheel also being located on the tensioning shaft and being coupled to the ratchet wheel.
Ist die nötige Spannung des Energiespeichers erreicht, was in dem Augenblick der Fall ist, wenn durch die Drehung des Klinkenrades und des Nockenrades der Hebelantrieb, in diesem Fall ein Kniehebel, seinen Totpunkt überschritten hat, so greift der Blockierhebel im Sinne einer Sperrung in das Nockenrad ein. Die Sperrung kann dann beim Auslösen des Schaltvorganges über einen weiteren Hebel aufgehoben werden.If the required voltage of the energy storage device is reached, which is the case when the lever drive, in this case a toggle lever, has exceeded its dead center due to the rotation of the ratchet wheel and the cam wheel, the blocking lever engages in the cam wheel in the sense of a lock on. The lock can then be released via a further lever when the switching process is triggered.
Um zu verhindern, daß auf das Klinkenrad nach erfolgtem Spannen des Energiespeichers durch den Motorantrieb oder von
2In order to prevent that on the ratchet wheel after the energy storage has been tensioned by the motor drive or by 2
Hand noch weiter eine Kraft aufgebracht werden kann, was zu mechanischen Schäden führen könnte, wird der Klinkenantrieb vom Klinkenrad mechanisch abgekoppelt . Das geschieht durch einen an der Transportklinke angeordneten Stift, der von dem Blockierhebel mitgenommen wird und die Transportklinke aus dem Eingriff mit der Verzahnung des Klinkenrades herausbewegt .If a force can still be applied by hand, which could lead to mechanical damage, the ratchet drive is mechanically decoupled from the ratchet wheel. This is done by a pin arranged on the transport pawl, which is carried by the blocking lever and moves the transport pawl out of engagement with the toothing of the ratchet wheel.
Eine ähnliche Lösung ist aus der US 4 095 676 bekannt . Bei der dort beschriebenen Spanneinrichtung wird dieA similar solution is known from US 4,095,676. In the clamping device described there, the
Transportklinke vom Klinkenrad dadurch entkoppelt, daß eine mit dem Klinkenrad verbundene Steuerscheibe auf einen in einer Führung gelagerten, federbelasteten Steuerstift einwirkt, der beim Erreichen der Spannstellung durch die Steuerkurve der Steuerscheibe radial nach außen geschoben wird und mit seinem aus der Führung heraustretenden hinteren Ende die Transportklinke aus der Verzahnung des Klinkenrades herausdrückt .Transport pawl decoupled from the ratchet wheel in that a control disk connected to the ratchet wheel acts on a spring-loaded control pin mounted in a guide, which is pushed radially outward when the tensioning position is reached by the control curve of the control disk and with its rear end emerging from the guide, the transport pawl from the toothing of the ratchet wheel.
Beide Lösungen erfordern eine Vielzahl komplizierter mechanischer Einzelteile, die entsprechenden Bauraum beanspruchen und die Anordnung fertigungstechnisch aufwendig werden lassen . Außerdem bergen miteinander gekoppelte, einzeln gelagerte und mit Rückholfedern belastete Einzelteile stets die Gefahr des Verklemmens und gefährden somit die Zuverlässigkeit und Funktion des Schalters .Both solutions require a large number of complicated mechanical individual parts, which take up the corresponding installation space and make the arrangement complex in terms of production technology. In addition, individual parts that are coupled to one another, stored individually and loaded with return springs always harbor the risk of jamming and thus endanger the reliability and function of the switch.
Der Erfindung liegt daher die Aufgabe zugrunde, eine Spanneinrichtung der eingangs genannten Art zu schaffen, die einfach aufgebaut ist und mit der die Funktionssicherheit des Schalters weiter erhöht werden kann.The invention is therefore based on the object of providing a tensioning device of the type mentioned at the outset, which is of simple construction and with which the functional reliability of the switch can be increased further.
Diese Aufgabe wird erfindungsgemäß durch die Merkmale des Anspruchs 1 gelöst .
3 Eine zweckmäßige Ausgestaltung der Erfindung ist im Anspruch 2 enthalten.This object is achieved by the features of claim 1. 3 A useful embodiment of the invention is contained in claim 2.
Die Erfindung hat den Vorteil, daß die Spanneinrichtung mit wenigen, einfach zu fertigenden Einzelteilen auskommt und durch die unkomplizierte Funktionsweise eine Erhöhung der Schaltsicherheit des Schalters erreicht wird, indem auf der Spannwelle eine sich mit dem Klinkenrad mitbewegende Steuerscheibe angeordnet ist, die über den größten Teil ihres Umfanges eine konzentrische Kontur und über den verbleibenden Teil ihres Umfanges eine über die konzentrische Kontur überstehende Nase hat und die Transportklinke einen an der Steuerscheibe zur Anlage gebrachten Steuerstift aufweist.The invention has the advantage that the tensioning device manages with a few, easy-to-manufacture individual parts and that the uncomplicated operation increases the switching reliability of the switch by arranging a control disk which moves with the ratchet wheel on the tensioning shaft and which over most of it its circumference has a concentric contour and over the remaining part of its circumference has a nose protruding beyond the concentric contour and the transport pawl has a control pin which is brought into contact with the control disk.
Die Erfindung soll nachstehend anhand eines zumindest teilweise in den Figuren dargestellten Ausführungsbeispiels näher erläutert werden. Es zeigen:The invention will be explained in more detail below on the basis of an exemplary embodiment shown at least partially in the figures. Show it:
Fig.l den Klinkenantrieb der Spanneinrichtung mit dem Steuerstift außerhalb der Hinterschneidung,Fig.l the pawl drive of the clamping device with the control pin outside the undercut,
Fig.2 den Klinkenantrieb der Spanneinrichtung mit dem Steuerstift in Eingriff mit der Hinterschneidung.2 shows the pawl drive of the tensioning device with the control pin in engagement with the undercut.
Wie aus den Figuren 1 und 2 ersichtlich ist, trägt ein an einer Spannwelle 1 drehbar gelagerter Spannhebel 2 eine an einer Achse 3 drehbare Transportklinke 4. Die Transportklinke 4 steht mit einem Klinkenrad 5 im Eingriff und dreht dieses bei schrittweiser Betätigung des Spannhebels 2 in der angezeigten Pfeilrichtung, wobei über einen hier nicht gezeigten Kniehebel ein Energiespeicher, z. B. eine Druckfeder, gespannt wird. Eine an einer Grundplatte 6 drehbeweglich gelagerte Sperrklinke 7 verhindert eine Rückwärtsdrehung des Klinkenrades 5.
4 Der Spannhebel 2 kann durch einen Handhebel 8 betätigt werden oder auch durch einen in den Figuren nicht gezeigten motorischen Antrieb.As can be seen from FIGS. 1 and 2, a tensioning lever 2 rotatably mounted on a tensioning shaft 1 carries a transport pawl 4 which can be rotated on an axis 3. The transport pawl 4 is in engagement with a ratchet wheel 5 and rotates this when the tensioning lever 2 is actuated step by step indicated arrow direction, an energy storage device, for. B. a compression spring is tensioned. A pawl 7 rotatably mounted on a base plate 6 prevents the ratchet wheel 5 from rotating backwards. 4 The clamping lever 2 can be operated by a hand lever 8 or also by a motor drive, not shown in the figures.
Der Spannhebel 2 wird so lange betätigt, bis der hier ebenfalls nicht gezeigte, z. B. als Kniehebel ausgebildete Hebelantrieb, gerade seinen Totpunkt überschritten hat. Der Energiespeicher ist so ausgelegt, daß er in dieser Stellung den Zustand einer maximalen Energiespeicherung annimmt, d.h., daß z. B. eine Druckfeder in dieser Stellung weitgehend zusammengedrückt ist. Um zu verhindern, daß sich das Klinkenrad 5 über den Totpunkt des Hebelantriebes im Sinne einer Entspannung des Energiespeichers selbsttätig weiterbewegt, wird in dieser Stellung gleichzeitig eine Blockiereinrichtung wirksam, die bei der Auslösung eines Schaltvorganges freigegeben wird. Die Schaltkontakte des Leistungsschalters werden beim Auslösen eines Schaltvorganges durch die Spannwelle 1 betätigt, die durch den Energiespeicher in der gezeigten Drehrichtung stark beschleunigt wird.The tensioning lever 2 is operated until the likewise not shown here, for. B. trained as a toggle lever drive, has just exceeded its dead center. The energy storage is designed so that it assumes the state of maximum energy storage in this position, i.e. that e.g. B. a compression spring is largely compressed in this position. In order to prevent the ratchet wheel 5 from automatically moving beyond the dead center of the lever drive in the sense of relaxation of the energy store, a blocking device becomes effective in this position, which is released when a switching operation is triggered. The switching contacts of the circuit breaker are actuated when the switching process is triggered by the tensioning shaft 1, which is strongly accelerated by the energy store in the direction of rotation shown.
Mit dem Klinkenrad 5 fest verbunden ist eine Steuerscheibe 9, die bei Erreichen der Spannstellung des Klinkenrades 5 mit einer angeformten Nase 10 auf einen Steuerstift 11 an der Transportklinke 4 wirkt und damit die Transportklinke 4 aus der Verzahnung des Klinkenrades 5 herausbewegt. Eine weitere Drehung des Klinkenrades 5 durch Betätigen des Spannhebels 2 ist somit nicht mehr möglich.A fixed connection with the ratchet wheel 5 is a control disk 9 which, when the ratchet wheel 5 has reached the tensioned position, acts on a control pin 11 on the transport pawl 4 with a molded nose 10 and thus moves the transport pawl 4 out of the toothing of the ratchet wheel 5. A further rotation of the ratchet wheel 5 by actuating the tensioning lever 2 is therefore no longer possible.
Erst bei einer Schalterauslösung kann sich dann auch das Klinkenrad 5 in der gleichen Drehrichtung wie beim Spannen des Energiespeichers weiterbewegen. Die Nase 10 hat eine solche Abmessung, daß bei einer Weiterdrehung des Klinkenrades 5 um etwa 20° die Transportklinke 4, zweckmäßig unter der Wirkung einer Rückholfeder, wieder in die
5Only when the switch is triggered can the ratchet wheel 5 then continue to move in the same direction of rotation as when the energy store is tensioned. The nose 10 has such a dimension that when the ratchet wheel 5 is rotated further by approximately 20 °, the transport pawl 4, expediently under the action of a return spring, returns to the 5
Verzahnung des Klinkenrades 5 eingreifen kann. Um einen sicheren Eingriff in die Verzahnung bei dem ersten darauffolgenden Spannhub zu garantieren und zu verhindern, daß der Steuerstift 11 bei diesem Spannhub an die Nase 10 stößt und möglicherweise ein Verklemmen von Transportklinke 4 und Klinkenrad 5 verursacht, ist die Nase 10 mit einer auf die ansonsten konzentrische Kontur zurückspringenden Hinterschneidung 12 versehen, in die der Steuerstift 11, wie in Fig.2 dargestellt, ungehindert eingreifen kann.Interlocking of the ratchet wheel 5 can engage. In order to guarantee a secure engagement in the toothing during the first subsequent clamping stroke and to prevent the control pin 11 from bumping against the nose 10 during this clamping stroke and possibly causing jamming of the transport pawl 4 and ratchet wheel 5, the nose 10 is one on the otherwise provided concentric contour recessed undercut 12, in which the control pin 11, as shown in Figure 2, can intervene unhindered.
Die Erfindung ist nicht beschränkt auf das hier dargestellte Ausführungsbeispiel. Vielmehr ist es möglich, durch Kombination und Modifikation der genannten Mittel und Merkmale weitere Ausführungsvarianten zu realisieren, ohne den Rahmen der Erfindung zu verlassen.
The invention is not restricted to the exemplary embodiment shown here. Rather, it is possible to implement and implement further embodiment variants by combining and modifying the means and features mentioned, without leaving the scope of the invention.
Claims
1. Spanneinrichtung für einen Energiespeicher eines Niederspannungs-Leistungsschalters mit einem mittels einer durch einen Spannhebel betätigbaren Transportklinke schrittweise in einer Drehrichtung zu drehenden, auf einer Spannwelle sitzenden Klinkenrad, das bei seiner Drehbewegung über einen Hebelantrieb die Spanneinrichtung bis zur Sperrung durch eine zum Schalten lösbare Blockiereinrichtung spannt, wobei die Rückwärtsdrehung des Klinkenrades durch eine Sperrklinke verhindert wird, d a d u r c h g e k e n n z e i c h n e t , daß auf der Spannwelle (1) eine sich mit dem Klinkenrad (5) mitbewegende Steuerscheibe (9) angeordnet ist, die über den größten Teil ihres Umfanges eine konzentrische Kontur und über den verbleibenden Teil ihres Umfanges eine über die konzentrische Kontur überstehende Nase (10) hat und die Transportklinke (4) einen an der Steuerscheibe (9) zur Anlage gebrachten Steuerstift (11) aufweist.1.Tensioning device for an energy storage device of a low-voltage circuit breaker with a ratchet wheel, which can be rotated step-by-step in one direction of rotation by means of a transport pawl which can be actuated by a tensioning lever, and which on its rotation movement via a lever drive the tensioning device until it is blocked by a blocking device which can be released for switching tensions, the reverse rotation of the ratchet wheel is prevented by a pawl, characterized in that on the tensioning shaft (1) with the ratchet wheel (5) moving control disc (9) is arranged, which has a concentric contour over most of its circumference and over the remaining part of its circumference has a nose (10) projecting beyond the concentric contour and the transport pawl (4) has a control pin (11) brought into abutment on the control disk (9).
2. Spanneinrichtung nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t , daß die Nase (10) eine mit dem Steuerstift (11) zusammenwirkende Hinterschneidung (12) aufweist.
2. Clamping device according to claim 1, so that the nose (10) has an undercut (12) cooperating with the control pin (11).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1998103968 DE19803968A1 (en) | 1998-01-23 | 1998-01-23 | Tensioning arrangement e.g. for compression or draw-spring of low voltage (LV) power switch |
| DE19803968.9 | 1998-01-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1999038178A1 true WO1999038178A1 (en) | 1999-07-29 |
Family
ID=7856364
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/DE1999/000179 WO1999038178A1 (en) | 1998-01-23 | 1999-01-15 | Clamping device for an energy accumulator in a low-voltage power breaker |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE19803968A1 (en) |
| WO (1) | WO1999038178A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6965588B2 (en) | 2001-11-29 | 2005-11-15 | Motorola, Inc. | Method for expediting transitions between states of operation in communications equipment |
| CN101777440B (en) * | 2009-12-24 | 2012-01-11 | 黄勤飞 | Driving device for actuating mechanism |
| CN102496532A (en) * | 2011-12-29 | 2012-06-13 | 无锡江南奕帆电力传动科技股份有限公司 | Manual and electricity-driven operation integrated operation mechanism used for circuit breaker |
| CN101783255B (en) * | 2009-12-24 | 2012-07-11 | 黄勤飞 | High-pressure operation mechanism |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3944772A (en) * | 1974-10-18 | 1976-03-16 | Westinghouse Electric Corporation | Circuit breaker with low torque motor |
| US4095676A (en) * | 1976-11-23 | 1978-06-20 | Howe-Yin Research Co., Inc. | Stored energy operation for breakers |
| DE3541093A1 (en) * | 1985-11-18 | 1987-05-21 | Siemens Ag | DRIVING DEVICE FOR A LOW VOLTAGE CIRCUIT BREAKER WITH A Pawl |
| US4787480A (en) * | 1986-08-13 | 1988-11-29 | Sachesenwerk, Aktiengesellschaft | Tensioning device for the energy store of an electrical switch |
-
1998
- 1998-01-23 DE DE1998103968 patent/DE19803968A1/en not_active Withdrawn
-
1999
- 1999-01-15 WO PCT/DE1999/000179 patent/WO1999038178A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3944772A (en) * | 1974-10-18 | 1976-03-16 | Westinghouse Electric Corporation | Circuit breaker with low torque motor |
| US4095676A (en) * | 1976-11-23 | 1978-06-20 | Howe-Yin Research Co., Inc. | Stored energy operation for breakers |
| DE3541093A1 (en) * | 1985-11-18 | 1987-05-21 | Siemens Ag | DRIVING DEVICE FOR A LOW VOLTAGE CIRCUIT BREAKER WITH A Pawl |
| US4787480A (en) * | 1986-08-13 | 1988-11-29 | Sachesenwerk, Aktiengesellschaft | Tensioning device for the energy store of an electrical switch |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6965588B2 (en) | 2001-11-29 | 2005-11-15 | Motorola, Inc. | Method for expediting transitions between states of operation in communications equipment |
| CN101777440B (en) * | 2009-12-24 | 2012-01-11 | 黄勤飞 | Driving device for actuating mechanism |
| CN101783255B (en) * | 2009-12-24 | 2012-07-11 | 黄勤飞 | High-pressure operation mechanism |
| CN102496532A (en) * | 2011-12-29 | 2012-06-13 | 无锡江南奕帆电力传动科技股份有限公司 | Manual and electricity-driven operation integrated operation mechanism used for circuit breaker |
Also Published As
| Publication number | Publication date |
|---|---|
| DE19803968A1 (en) | 1999-07-29 |
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