EP2137746B1 - Locking device for an installation switch device - Google Patents

Description

The invention relates to an installation switching device according to the preamble of claim 1.

Installation switchgear, such as a selective main circuit breaker or a non-selective circuit breaker, usually comprise at least one contact point, which is formed of a fixed and a contact lever located on a movable contact piece, input and output terminals, an operating lever for operating from the outside and a derailleur, the can be actuated by the operating lever and which cooperates with the contact lever so that closed in a Verklinkungszustand the switching mechanism, the contact point, and in a Entklinkungszustand the switching mechanism, the contact point is permanently opened. Thus, when the switchgear is latched, current can flow from the input terminal to the output terminal via the contact point; when the switchgear is disconnected, this current path is interrupted.

By the operating lever, the derailleur can be brought into the latched state, that is turned on, or brought into the unlatched state, that is turned off. In the interior of the service switching device also tripping devices are still present, which act on the switching mechanism when certain faulty operating conditions in the monitored by the installation switching device circuit, such as short circuit or overcurrent, so that this goes into the unlatched state, if it is before the release in the latched Condition was. For this purpose, the derailleur comprises a release lever, which can be either in a Verklinkungsstellung or in a Entklinkungsstellung. When the release lever located in the Verklinkungsstellung, so the rear derailleur can be latched by the operating lever. When the release lever is in the unlatched position, the rear derailleur disengages if previously latched. If the rear derailleur is unlatched and the release lever is held in the unlatched position, then the rear derailleur can not be latched again.

Usually, the release lever is held by a fetlock spring in the Verklinkungsstellungsstellung. When a short-circuit or overcurrent occurs, the corresponding triggering device acts on the release lever so that it briefly transitions from the Verklinkungs- to the Entklinkungsstellung so that the rear derailleur is unlatched, and then immediately spent by the fetlock spring back into the Verklinkungsstellung.

Often there is a requirement that an installation switching device from the off state only authorized by authorized personnel to be turned on again, For example, if the main circuit breaker is turned off because of performing maintenance on the electrical installation of a house to allow safe working, should be prevented in that an unauthorized person switches the switch back on, because this should be done only after proper completion of the maintenance by a person authorized to do so.

In today available devices of the prior art, this problem is usually solved by an additional cap or other mechanical locking device is attached to the outside of the operating lever, which prevents the operation of the operating lever and can only be removed by the authorized person. Since the authorized persons are often employees of the power supply companies (RUs), such a blocking device is also called "EVU lock".

However, this requires an additional externally attached to the service switching device part, which means a significant overhead in the production and spare parts inventory. In addition, there are security vulnerabilities, since the externally mounted locking device can be mistakenly mounted in the on state.

The DE 10 2004 019 174 A1 shows a generic locking device, where there arranged a trigger lever-adjusting device inside the switching device is that is adjustable from outside of the service switching device between a switch-on and a switch-off, that in the off position, the release lever is held in Entklinkungsstellung. The release setting device is a slider which can be moved by a rotatably mounted and operable from the outside only by a special tool control part. Such a device still requires an additional part inside the service switching device, namely the additional slide, and is therefore expensive.

The DE 25 07 497 shows a residual current circuit breaker with switching mechanism and test button on which a fixed contact with cooperating contact spring is arranged, wherein on the test button parallel to the user interface of the device and the trip lever of the derailleur pioneering cam is formed, which after pressing and turning the test button by means of a tool engages in the derailleur, thereby preventing a latching of the derailleur.

It is therefore the object of the present invention to simplify a generic locking device even further.

The object is achieved by an installation switching device according to claim 1.

According to the invention, therefore, the pin points into the interior of the switching device to the release lever and is coupled in the off position of the trigger lever-actuating part with the release lever.

In an advantageous embodiment of the invention, the trigger lever-adjusting part is rotatably mounted about a rotation axis pointing towards the trigger axis, and the pin is mounted eccentrically to the axis of rotation of the trigger lever-actuating part. The release lever-adjusting part is mounted and corresponds with the release lever, that in the locking position of the actuating part of the pin acts directly on an extension of the release lever and thereby holds it in the unlatching position.

Thus, the release lever can not lock the latching point with the pawl lever, and the shift handle runs empty.

According to a particularly advantageous embodiment, the pin carries a bevel, which cooperates with the insertion of the actuating part on the extension of the release lever with an edge of the extension and thereby causes a continuous pivoting of the release lever in the unlatched position.

According to the invention, the release lever is a double-arm lever. He has a first, the so-called. Verklinkungsarm, which carries at its free end a nose which interacts in the latched state with the Verklinkungsfläche the pawl lever. It has a second, the trigger arm, at which, in the vicinity of the axis of rotation and approximately perpendicularly from the second arm towards the front front side, the projection from which the pin of the trigger lever actuating part is coupled in the switch-off position.

According to a further advantageous embodiment, the operating side of the trigger lever actuating part is mounted on the front front of the device and the rear derailleur with the trigger lever is mounted near the front front of the device.

In a particularly advantageous embodiment of the invention, the trigger lever-actuating part can only be actuated by means of a special tool. Such special tools can be made available by organizational measures only to authorized persons, for example the maintenance and commissioning staff of the RU.

The advantage of a locking device according to the invention lies in the direct action of the trigger lever-actuating part on the release lever. As a result, the slider is saved, whereby a simpler and less susceptible to interference removal of the service switching device is made possible.

Further advantageous embodiments and improvements of the invention and further advantages can be taken from the subclaims.

Reference to the drawings, in which an embodiment of the invention is illustrated, the invention and further advantageous refinements and improvements of the invention will be explained and described in detail.

Figur 1

eine Ausführungsform einer erfindungsgemäßen Verriegelungsvorrichtung, bei der sich das Auslösehebel-Stellteil in Einschaltposition befindet;

Figur 2

eine Detailansicht der Figur 1

Figur 3

die Ausführungsform einer erfindungsgemäßen Verriegelungsvorrichtung wie in Figur 1 , bei der sich das Auslösehebel-Stellteil in Ausschaltposition befindet, sowie

Figur 4

eine Detailansicht der Figur 3.

Show it:

FIG. 1

an embodiment of a locking device according to the invention, in which the trigger lever-actuating part is in the on position;

FIG. 2

a detailed view of the FIG. 1

FIG. 3

the embodiment of a locking device according to the invention as in FIG. 1 , in which the trigger lever actuator is in the off position, as well

FIG. 4

a detailed view of the FIG. 3 ,

It will be the first FIG. 1 considered. In the FIG. 1 a locking device according to the invention is shown, comprising a rear derailleur 10 and a trigger lever-actuating part 12. The rear derailleur 10 and the locking device 12 are installed in a service switching device, such as a main circuit breaker. The main circuit breaker itself is only indicated here by the engraved device front side 2 of the housing. Incidentally, a main circuit breaker is known as such in principle. The derailleur of a main circuit breaker according to the invention is mounted below the housing wall 2 in the area in which a in a plane parallel to the housing wall 2 pivotable release lever-actuating part 12 is provided. At the trigger lever-actuating part 12 to the rear derailleur 10 reaching pin 123 is attached, formed here. When pivoting the release lever-actuating part 12 in the plane parallel to the housing wall 2, the release lever 30 of the rear derailleur 10 by the pin 123 in its Entklinkungsstellung durable. In the example shown here, the housing wall 2 is the front front side of an insulating housing of the service switching device.

The core of the rear derailleur 10 is a Verklinkungsstelle 31, formed by the interaction of a nose 302 on the Verklinkungsarm 301 of a trigger lever 30 with the Verklinkungsfläche a ratchet lever 27th

A control lever 17 is connected via a pivot pin 18 with a first intermediate lever 19. This is hingedly connected via a pivot pin 20 with a second intermediate lever 21 which is hinged to a hinge axis 23 to a switch knob 24 with a control handle 25. The switch knob 24 is mounted in a stationary axis 22.

The pivot pin 20 is movably guided in a slot 26 of the pawl lever 27. The pawl lever 27 is rotatably mounted in a stationary manner about a rotation axis 28. The latch lever 27 forms a latching point 31, which is rotatably mounted about a stationarily mounted axle 29.

The release lever 30 is designed as a double arm, the first, the Verklinkungsstelle inclined arm 301, also called Verklinkungsarm carries a nose 302 which forms the Verklinkungsstelle 31 together with a nose 271 of the ratchet lever 27. The second, 30 pointing away from the Verklinkungsstelle arm 303 of the trigger lever 30, also called trigger arm, carries a nose 304. At this nose 304 attack or the thermal release of the switch, for example via - not shown here - slider. By the action of the thermal release of the trigger lever 30 is pivoted during the triggering process in a clockwise direction, so that the nose 302, the nose 271 releases, whereby the Verklinkungsstelle 31 is unlatched.

The rear derailleur serves to permanently open or close a disconnect pad which includes a moveable contact piece 401 mounted on a contact carrier arm 400 and a fixed contact piece, not shown, either by manual actuation by means of a shift handle, or the closed isolating contact point on the action open a triggering organ and keep it permanently open. The action of the trigger member is done via the trigger lever 30, in such a way that upon activation of the trigger member of the trigger lever 30 is rotated so that the nose 302 is released at its Verklinkungsarm 301 of the Verklinkungsfläche 271 of the ratchet lever 27 and so the Verklinkungsstelle 31 is unlatched.

The illustrated rear derailleur 10 could for example be part of the switching mechanism of a selective main circuit breaker. The trigger member may then be a thermal release or a magnetic quick release, both of which act on the release arm 303 of the release lever 30 in a suitable manner via a release slide, not shown. About the control lever 17 is the rear derailleur 10 according to the FIG. 1 in conjunction with another contact lever, which is part of a main contact point in the main circuit breaker, not shown here. When switching on manually via the control handle 25, both the isolating contact point and the main contact point are closed, or when manually switching off both are opened.

A manual switching on the handle 25 is only possible with latched Verklinkungsstelle 31. If the Verklinkungsstelle 31 held in its unlatched position, the handle 25 is free, and the isolating contact point and the main contact point remain open.

The release lever 30 carries an extension 305, which protrudes in approximately perpendicular to the longitudinal direction of the release lever of this in the direction of the front of the device 2 and is mounted approximately in the vicinity of the axis of rotation 201 of the release lever.

The release lever-adjusting part 12 comprises an approximately cylindrical base body 121 which is rotatable in a recess of the housing wall about a stationary axis of rotation 122 which is oriented approximately perpendicular to the longitudinal direction of the trigger lever 30, and thus in a plane parallel to the housing wall about the axis 122nd is pivotally mounted. To the main body 121, a pin 123 is eccentrically mounted. This one has in the Figures 1 and 2 shown engagement position of the trigger lever actuating part 12 of the trigger lever extension 305 a distance which is so large that the trigger lever 30 can pivot freely about its axis 29.

The imaginary extension of the axis 123 of the trigger lever of the actuator 12 intersects the trigger lever 30 near its axis 29. The resulting spatial proximity of the trigger lever actuator 12 to the trigger lever extension 305 is important to allow without another intermediate part the trigger lever-actuating part 12 can hold the trigger lever 30 in the release position.

It will be the FIGS. 3 and 4 considered. In the in the FIGS. 3 and 4 shown off position, the trigger lever-adjusting member 12 has been rotated by 90 °. Now, the pin 123 of the trigger lever actuator 12 abuts on the trigger lever extension 305 and holds it pivoted clockwise so that the nose 302 is lifted on the Verklinkungsarm 301 of the Verklinkungsfläche the ratchet lever. In this position, the Verklinkungsstelle 31 is thus unlatched and manual switching on the service switching device is not possible.

The trigger lever-Stellteil12 has on its front of the device 2 side facing an actuating part 124 which allows engagement with a special tool. The actuating part 124 is designed so that only with this special tool, a rotation of the trigger lever-actuating part 12 is possible. Once brought into the off position, the service switching device can therefore only be turned back to the on position by the authorized person who has the special tool as a sign of their authorization.

The actuating member 124 is, for example, a pin with a specially shaped peripheral contour, such as a hexagon of such dimensions, which does not fit any of the conventional and standardized screwdriver cross-sections.

At the location of the front of the device 2, on which the actuating member 124 is visible, there is a blind hole-like recess 201, in the center of which a rotatably mounted, outer pin rises, which forms the actuating part 124. In addition to the peripheral contour of the pin and the distance of the pin of the side walls 202 of the recess 201 is dimensioned so that only the already mentioned special tool for rotating the operating member 124 can be introduced.

The pin 123 of the trigger lever actuator 12 has a chamfer 25. This ensures that upon rotation of the trigger lever actuator 12 in the off position of the pin 123 of the trigger lever-adjusting sliding with its outer peripheral contour cooperates with the trigger lever extension 305 and thereby jamming or jamming is avoided. <B> LIST OF REFERENCES </ b> 2 Switchgear front 201 recess 10 derailleur 202 Side wall of the recess 12 Sear setting part 271 Nose of the ratchet lever, Verklinkungsfläche 17 control lever 18 pivot 301 latch arm 19 first intermediate lever 302 Nose of the release lever 20 pivot pin 303 release arm 21 second intermediate lever 304 nose 22 fixed axis 23 joint axis 305 Sear extension 24 toggle switch 400 contact support 25 shifter 401 movable contact piece 26 Slot of the ratchet lever 27 ratchet lever 28 Rotary axis of the ratchet lever 29 Axle of the release lever 30 sear 31 latching 121 cylindrical body 122 fixed axis of rotation 123 Pin of the trigger lever actuator 124 actuating member 125 bevel

Claims (9)

1. Service switching device having a housing in which a switching mechanism (10) which can be moved from a latching state to an unlatching state by a release lever (30) is installed, wherein the switching mechanism (10) is fitted underneath the housing wall (2) in the region in which a release lever actuating part (12) which can be pivoted in a plane parallel to the housing wall (2) is provided, and wherein a pin (123), which points towards the release lever (30) of the switching mechanism (10), is fitted to the release lever actuating part (12), so that, when the release lever actuating part (12) pivots, the release lever (30) of the switching mechanism (10) can be held in its unlatching position by the pin (123), wherein the release lever (30) is a double-armed lever with a latching arm (301) which has a lug (304) at its free end, said lug, in the latched state, interacting with the latching surface of the catch lever (27), and with a release arm (303) on which a projection (305) protrudes in the vicinity of the rotation axis and approximately at a right angle from the release arm (303) in the direction of the housing wall (2) of the switching device, it being possible for the pin (123) of the release lever actuating part (12) to be coupled to the said projection in the switched-off position and it thereby being possible for the release lever (30) of the switching mechanism (10) to be held in its unlatching position by the pin (123), wherein the release lever actuating part (12) comprises an approximately cylindrical main body (121) which can rotate about a stationary rotation axis (122) in a recess in the housing wall and thereby is mounted, such that it can pivot about the axis (122), in a plane which is parallel to the housing wall, characterized in that the release arm has a lug (304) on which a thermal release of the service switching device acts, and in that the rotation axis (122) of the release lever actuating part is oriented approximately perpendicular to the direction of the longitudinal extent of the release lever (30).
2. Service switching device according to Claim 1, wherein the operator control face of the release lever actuating part (12) is fitted to the front device front face (2).
3. Service switching device according to Claim 1, wherein the switching mechanism (10), together with the release lever (30), is fitted close to the front device front face (2).
4. Service switching device according to Claim 3, wherein the release lever actuating part (12), on its side which faces the device front face (2), has an operating part (124) which allows engagement with a special tool.
5. Service switching device according to Claim 4, wherein the operating part (124) is designed such that operation of the release lever actuating part (12) is possible only using the special tool.
6. Service switching device according to Claim 5, wherein the operating part (124) is a pin with a specially shaped circumferential contour which is matched to the special tool.
7. Service switching device according to Claim 6, wherein a blind hole-like recess (201), in the interior of which the operating part (124) is located, is located at that point on the device front face (2) at which the operating part (124) can be seen.
8. Service switching device according to Claim 1, characterized in that the pin points into the interior of the switching device, and in that the release lever actuating part (12) is mounted such that it can rotate about a rotation axis (122) which points towards the release lever (30), and the pin (123) is fitted to the release lever actuating part (12) eccentrically with respect to the rotation axis (122).
9. Service switching device according to Claim 1, characterized in that the pin (123) has an incline (125) which, when the actuating part (12) is turned in towards the projection (305) on the release lever (30), interacts with a flank of the projection (305) and thereby pivots the release lever (30) into the unlatched position.

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