SK283786B6 - Switchgear with movable connection lines - Google Patents

Abstract

Electric switching device, such as automatic cut=out or fault current circuit breaker, for switch cabinet The switching device (1) has movable lines (2) for providing electrical connections with the terminal clamps of an immediately adjacent switching device within the switch cabinet. The lines are movable along a defined linear path relative to the switching device, with all lines mechanically coupled together so that they are moved in common. The lines may be mounted on a common carrier (6) which is displaced parallel to the side faces (10, 11) of the switching device.

Description

Technical field

BACKGROUND OF THE INVENTION The present invention relates to a switchgear for incorporation in a switchgear having a lead for establishing electrical connections to the connection terminals of another immediately adjacent switchgear, wherein the leads are arranged on a common carrier. The invention further relates to a residual current circuit breaker FI / line circuit breaker LS comprising this switchgear.

BACKGROUND OF THE INVENTION

As a rule, the switch cabinet comprises a plurality of spaced strips to which the various switchgear is attached, which are then electrically connected to one another.

There are switching devices which are arranged in each switch cabinet and must be connected electrically in series. The best examples of this are line circuit breakers and circuit breakers. For the sake of clarity, these components are usually arranged on one and the same bar directly next to each other. Since, as mentioned above, they must be continuously connected in series, both switches are manufactured as one piece in order to reduce the complexity of their interconnection.

EP-A1 649 158 discloses a fault current module which comprises a horizontally arranged - in relation to the mounting position in the switch cabinet - a rigid yoke in which the guides necessary for establishing electrical connections to the adjacent switch LS are arranged. The ends of the wires protrude from the yoke, in that, when the LS switch and the FI module are arranged side by side on one mounting rail, these ends engage the connection terminals of the LS switch.

With this connection of the FI module and the LS switch, both devices must be connected to each other indefinitely in order to prevent unprofessional replacement of individual components. If, however, other devices are arranged next to one another - for example a switch LS with a pulse switch - connected to each other in the manner described, each of the two devices can be replaced individually. A disadvantage of the embodiment according to EP A1 649 158 is that in the event of a failure - even if only one part of the switching block is defective - the entire switching block must be replaced or the switching block must be removed as a whole for repair.

However, when one of the two is replaced, the difficulty is that the modules are connected by a mounting rail and connected by a rigid caliper to each other. In order for this connection to be disconnected, both modules must be removed together so that the two downstream cables can be separated and removed from the rail.

DE U 78 13 854 also discloses a residual current circuit breaker FI which is connectable to a line circuit breaker arranged next to it. The connecting lines (hereinafter referred to as "cross-links"), which must be arranged between the two circuit breakers, are located in a contact strip made separately from the circuit breakers. This contact strip has tongues which can be connected to the circuit-breaker terminals and, on the one hand, the measuring rails, which can be inserted into the corresponding sockets of the FI circuit breaker.

SUMMARY OF THE INVENTION

SUMMARY OF THE INVENTION It is an object of the present invention to provide a switchgear of the above-mentioned type, in which there will be no restriction on the freedom of movement next to the arranged switchgear by electrical connection lines.

This is accomplished by a switchgear embedded in a switchgear having a wiring for making electrical connections to the connection terminals of another immediately adjacent switchgear, wherein the wires are arranged on a common carrier according to the invention, the essence of which is that each wiring is itself movable and the carrier is mounted in the switching device between the retracted and extended positions parallel to the side walls of the switching device.

In this way, it is ensured that the guides are movable not only together but also individually, for greater flexibility. The lines can be removed from both connection terminals of the adjacent switchgear and thus disconnect the mechanical connection of the two switchgears without moving the switchgear equipped with the leads. Since the conventional connection terminals are made in such a way that the lines to be inserted therein are inserted in a direction parallel to the side walls, according to a further preferred embodiment, any standard adjacent switchgear can be connected.

According to a preferred embodiment, the carrier has a first part which is straight and arranged parallel to the side walls of the switch apparatus, the first part being arranged inside the switch apparatus and passing through one side of the switch apparatus.

This provides a compact design and by arranging the carrier inside the switchgear, its walls simultaneously serve to insulate the conduit.

According to a further preferred embodiment, the carrier has a second part, attached at the end of the first part, extending through the transverse wall of the switch apparatus, substantially perpendicular thereto and arranged completely outside on the switch apparatus, the second part carrying the ends of the conduits to be connected to the connection terminals of the adjacent switch device.

In this way, the cables are particularly mechanically connected to one another and their placement in the connection terminals of an adjacent switchgear is thereby simplified.

According to a further preferred embodiment of the invention, the part of the support arranged parallel to the side walls of the switchgear has at its end extending through the transverse wall of the switchgear an elastically attached extension which abuts the edge of the switchgear crossgear in the extended position.

This makes it possible to releasably attach the carrier in its extended position, so that the adjacent switchgear can be positioned in its position particularly easily.

According to a further preferred embodiment, the support is formed by a flat plate on whose surfaces the guides are attached, since this embodiment can be manufactured particularly easily.

In this context, it may be advantageous if the board on each surface fitted with guides has walls arranged substantially perpendicular to these surfaces.

These walls serve for electrical isolation of individual lines.

It may be particularly advantageous if all the guides are fixed on one and the same surface of the board, since the guides can be similarly formed and their mounting, i.e. their placement on the board, is thereby particularly simplified.

According to a further preferred embodiment of the invention, the second part of the support, arranged on the outside of the switching device, is provided with extensions in the form of strips, preferably arranged substantially over the entire length of the second part of the support, on which a cover covering the lines can be fastened.

In this way, the lines can be covered from all sides and electrically insulated from the environment.

In this connection, it may be advantageous if protrusions extending in the direction of the plate are arranged on the inside of the lid.

By means of these projections, the guides can be clamped between the plate and the lid and fixed in the carrier, thereby eliminating further attachment measures, such as gluing, screwing or the like.

In this connection, a further improvement can be achieved in that the lid is provided with a protrusion in the region of its edge adjacent to the switching device, which protrudes into a corresponding recess in the transverse wall of the switching device in the extended position of the carrier.

The cover is thus secured against horizontal displacement in the extended position of the carrier, so that it cannot be released from the plate. There is therefore no need for equipment to permanently close the lid, such as gluing.

Furthermore, it is possible for the side wall on which the other switchgear is to be fitted with pins in the form of plugs which project into the apertures flush-mounted in the sidewall of the adjacent adjacent switchgear, since the adjacent switchgear can be applied to the sidewall. switchgear in precise arrangement.

It is a further object of the invention to provide a circuit breaker which comprises the described switchgear, fulfills both FI and LS functions, has a compact design and is easy to connect.

This is accomplished by a residual current circuit breaker FI / line circuit breaker LS comprising the described switchgear according to the invention which is characterized in that the switchgear consists of a fault current module comprising a switch lock, a summation current transformer and a summation current transformer connection. operating the circuit breaker lock, wherein the adjacent switchgear is a line circuit breaker and the circuit breaker circuit breaker is provided with a trigger finger, passing side walls of the circuit breaker module and a line circuit breaker and operating a circuit breaker circuit breaker of the adjacent line circuit breaker.

In this embodiment, the normally open circuit breaker closing contacts are also used to trip when the FI module is started. Thus, it is not necessary to provide the contacts of the FI part connected separately in series, thereby reducing the overall arrangement.

BRIEF DESCRIPTION OF THE DRAWINGS

The invention will be explained in more detail with reference to the accompanying drawings, in which:

Fig. 1 shows a front view of a switchgear according to the invention and another switchgear arranged next to it; FIG. 2 is a front view of a particularly preferred embodiment of the invention with an open body, FIG. 3 is an axonometric view of a guide carrier according to the invention; FIG. 4 is a perspective view of the switching apparatus of FIG. 2 with the body closed, FIG. 5a is an axonometric view of the carrier lid of FIG. 4, FIG. 5b is a sectional view of the lid; FIG. 6 is a side view of the switching apparatus of FIG. 2, FIG. 7 is a bottom view of the switching apparatus of FIG. 2, FIG. 8 is a front elevational view of the switching apparatus of FIG. 2 with a protective circuit breaker to be arranged next to it, FIG. 9 shows the arrangement of FIG. 8, wherein the module FI and the switch LS are pushed together and the guide carrier is in its extended position; and FIG. 10 shows the arrangement of FIG. 9, wherein the guide carrier is in its retracted position.

DETAILED DESCRIPTION OF THE INVENTION

As already mentioned, it is obviously provided with a switchgear 1 on the switchgear to be electrically connected to another switchgear 4 arranged directly next to it, with appropriate lines 2 in order to prevent their manual installation

This equipment also exists with the switching device 1 according to the invention, as best seen in FIG. The problem that exists in such an arrangement is, as we have already said, that, together with the electrical connection through the lines 2, a mechanical connection of the two switching devices 1, 4 is also established.

In order to be able to disconnect or connect the connection made by the guides 2 without moving the two switchgears 1, 4, and this is a situation which necessarily occurs when the two switchgears 1, 4 are installed in the switch cabinet, fasten relative to the switch 1 movably relative to the switch 1 along a predetermined path.

This possibility of movement can be realized, for example, in that the guides 2 are arranged to be rotatable about the axes 5. Preferably, however, the guides 2 are movable translationally, in particular they are displaceably disposed parallel to the side walls 10, 11 of the switchgear 1.

In principle, the guides 2 could be movable individually, i.e. they could be rotatably mounted on the switching device 1, but for the sake of ease of handling it is advantageous if the guides 2 are mounted movably on the switching device 1. Advantageously, the guides 2 are mechanically connected to each other, whereby a common possibility of movement is automatically provided. In the case of the pivot bearing of the guide 2 shown in FIG. 1, the axes 5 would then be combined into a common axis, or all axes 5 would be aligned coaxially. For further explanation, a very special exemplary embodiment of the invention shown in FIG. 2 to 10.

In this case, the switchgear 1 is designed as a fault current module, which itself has no switch contacts and only contains a fault current detection circuit with a corresponding circuit breaker lock. The circuit for fault current detection consists of a circuit breaker lock, a summation current transformer 17 and a circuit summation current transformer 17 that controls the circuit breaker lock. For clarity, FIG. 2, only the summation current transformer 17 is shown. The adjacent switchgear 4 is a line circuit breaker.

The trip circuit breaker lock includes a trigger finger 15 that extends through the trip circuit side wall 11 and the line circuit breaker side wall 40 and controls the line circuit breaker lock, see FIG. 8. The switch contacts LS of the circuit-breaker LS are used both for opening in the event of a line overload and in the event of a faulty current.

The invention is by no means limited to this embodiment and can be transferred to any kind of device to be built into a switch cabinet. Examples of this transfer are the LS switch next to the FI switch, the LS switch next to the pulse switch, the staircase switch, and so on.

As best shown in FIG. 2, the switchgear 1 comprises a carrier 6 on which the guides 2 are arranged. The carrier 6 is mounted in the switchgear 1 parallel to the side walls 10, 11 of the switchgear 1 slidably between the retracted and extended positions.

An essential part of this carrier 6 is its first part 60, arranged parallel to the side walls 10, 11. This first part 60 is disposed inside the switchgear 1 in a sliding manner similar to a socket and passes through one of the transverse walls 12, 13 of the switchgear LV therefore, the lower transverse wall 12 has been chosen, but quite equally, the first portion 60 of the carrier 6 could pass through the upper transverse wall 13.

At the end 61 of the first portion 60, which extends through the lower transverse wall 12 of the switchgear 1, a second portion 62 is attached substantially perpendicularly to the first portion 60. This second portion 62 is arranged completely out of the switchgear 1 and carries the guide ends 20. the guide ends 20 are disposed on the second part 62 of the carrier 6 such that when the carrier 6 moves in the direction of the arrow 8, they engage the connection terminals 3 of the directly adjacent switch 4, thus abutting the side wall 11 of the switch L

Referring now to FIG. The first part 60 of the carrier 6 further comprises at its end 61 passing through the lower transverse wall 12 a flexible attachment 63. This attachment 63 is located inside the switching device 1 in the retracted position of the carrier 6 and intervenes in the extended position of the carrier 6. behind the lower transverse wall 12 and can therefore be mounted on the edge 64 of the lower transverse wall 12, see also FIG. 4. The carrier 6 is lockable in its extended position.

The carrier 6 is formed by a flat plate 65, on the surfaces of which the guides 2 are attached. (To maintain clarity, only one guide 2 is shown in FIG. 3). As in the exemplary embodiment shown in the figures, all lines 2 are fastened on one and the same surface of the board 65, i.e. on the surface of the board 65 facing away from the other switchgear 4. However, according to the invention board surfaces

65 so that, for example, with the same dimensions of the plate 65, it is possible to locate the guides 2 of larger cross-section or to arrange the guides 2 on the surface of the plate 65 facing away from the other switching device 4.

In all cases, however, it is important that the lines 2 are sufficiently isolated from each other. This could be done, for example, in that the guides 2 are encapsulated with an insulating material, for example plastic.

Another possibility is that the plate 65 is provided with walls on each surface fitted with the guides 2

66, arranged substantially perpendicular to these surfaces. This results in individual chambers in which the guides 2 can be insulated from one another.

In this method of insulation it is not necessary to insulate each conduit 2 alone, but to use bare metal strips, for example copper strips. In order to prevent these copper strips from being freely accessible in the switch cabinet, there is provided a cover 7 which covers the guides 2 in the region of the second part 62 of the carrier 6. For fastening with form fit, rails 67 and rails 75 are arranged on the second part 62. moldings also at the age 7 itself, see FIG. 5a, 5b.

On its face 72 facing the switchgear 1, the lid 7 is open and on the face facing away from the switchgear 1, the lid 7 is closed by the end wall 71. Thus, the lid 7 can be slid onto the second part 62 of the carrier 6 in the arrow direction. 9 in FIG. Second

On the inside of the lid 7 there are protrusions 73 extending in the direction of the plate 65 of the carrier 6. As can be seen from FIG. 6, the projections 73 are of such a height that they rest on the guides 2 and the guides 2 thus clamp between the plate 65 and the lid 7.

In the region of its side edge 72, adjacent to the switchgear 1, the cover 7 is provided with a protrusion 74 which, in the retracted position of the carrier 6, engages in a corresponding recess in the lower transverse wall 12 of the switchgear 1, see FIG. 7th

This prevents the cover 7 from sliding in the retracted position of the carrier 6, that is to say after the assembly has been completed, and a reliable insulation of the guide 2 is guaranteed.

In the exemplary embodiment of the invention shown in the figures, as explained above, the movement of the switch lock switch 1 is transmitted by a trigger finger 15 passing through the side wall 11 to the lock just next to the arranged switch LS. In order that this trigger finger 15 can be inserted exactly into the respective lock socket of the switch LS when the two switching devices 1, 4 are connected together, it is advantageous if the side wall 11 on which the other switching device 4 is to be fitted is provided with a pin 16. When the two switchgears 1, 4 are fully pushed together, the pin-shaped extensions 16 engage the holes recessed mirror-symmetrically in the side wall of the adjacent switchgear 4, thereby ensuring a precise mutual arrangement of the two switchgears 1, 4.

Referring now to FIG. 8 to 10 describes the method of mounting the FI / LS module according to the invention. The switchgear 1 in the form of a fault current module is fastened to the circuit-breaker rail by snap-in connection and the carrier 6 is brought into its extended position. A further switchgear 4 in the form of a line circuit breaker is also arranged on this strip, at a small horizontal distance from the switchgear 1 in the form of a fault current module, see FIG. 8. The two switching devices 1, 4 now slide together until the pin-shaped extensions 16 engage the corresponding holes and the lowering finger 15 into the corresponding socket and the switching devices 1, 4 engage one another with their side walls 11, 40, see FIG. 9th

Then the carrier 6 is brought into its retracted position, the guide ends 20 are thereby inserted into the connection terminals 3 of the switchgear 4 in the form of a line circuit breaker, and by tightening the connection terminals 3 an electrical connection is established. 10th

Claims (12)

PATENT CLAIMS Switchgear for switching into a switch cabinet, which has a guide (2) for making electrical connections to the connection terminals (3) of another immediately adjacent to the arranged switchgear (4), the leads (2) being arranged on a common carrier (6), characterized in that each of the guides (6) is movable per se and the carrier (6) is mounted in the switching device (1) slidably between the retracted and extended positions parallel to the side walls (10, 11) of the switching device (1) . Switching device according to claim 1, characterized in that the carrier (6) has a first part (60), Arranged parallel to the side walls (10, 11) of the switchgear (1), which is arranged inside the switchgear (1) and passes through its transverse wall (12,13) of the switchgear (1) at its end (61). Switching device according to claim 2, characterized in that the support (6) has a second part (62) arranged completely outside on the switching device (1), fastened at the end (61) of the first part (60), passing through the transverse wall (62). 12) of a switching device (1), substantially perpendicular to the first part (60), the second part (62) carrying guide ends (20) connectable to the connection terminals (3) of the adjacent switching device (4). Switching device according to claim 2 or 3, characterized in that the first part (60) of the carrier (6), arranged parallel to the side walls (10, 11) of the switching device (1), has at its end (61) extending a transverse wall (12) of the switchgear (1), a resiliently fastened extension (63) which, in the extended position of the support (6), is mounted on the edge (64) of the cross-wall (12) of the switchgear (1). Switching device according to one of Claims 1 to 4, characterized in that the support (6) is formed by a flat plate (65) on whose surfaces the guides (2) are attached. Switching device according to claim 5, characterized in that the plate (65) is provided on each surface provided with guides (2) with walls (66) arranged substantially perpendicular to its surfaces. Switchgear according to claim 5 or 6, characterized in that all the guides (2) are fixed on one and the same surface of the plate (65). Switching device according to one of Claims 5, 6 or 7, characterized in that the second part (62) of the support (6) arranged outside on the switching device (1) is provided with rail-shaped extensions (67) arranged in substantially along the entire length of the second part (62) of the carrier (6), on which a cover (7) covering the guide (2) is attachable with a shape fit. The switchgear according to claim 8, characterized in that protrusions (73) extending towards the plate (65) of the carrier (6) are arranged on the inside of the lid (7). Switching device according to claim 8 or 9, characterized in that the cover (7) is provided with a protrusion (74) in the retracted position of the carrier (6) in the region of its side edge (72) adjacent to the switching device (1). 1) engages a corresponding recess in the transverse wall (12) of the switchgear (1). Switching device according to one of Claims 1 to 10, characterized in that pin-shaped extensions (16) are formed on the end wall (11) on which the other switching device (4) is fitted, which extend into the retracted state into apertures recessed mirror-symmetrically into the side wall (40) of the adjacent other switching device (4). Fail-current circuit breaker FI / line circuit breaker LS, comprising a switchgear (1) according to one of claims 1 to 5, characterized in that the switchgear (1) consists of a fault current module comprising a circuit breaker, a summation measuring device the current transformer (17) and the wiring of the summation current transformer (17) and the circuit breaker control lock, the adjacent switchgear (4) being constituted by a line circuit breaker and the fault current module breaker lock provided with a trigger finger (15) passing through the side walls (11, (40) the fault current module and the line circuit breaker and the circuit breaker control lock of the adjacent line circuit breaker.