AT504454A1 - SWITCHGEAR - Google Patents

Abstract

The invention relates to a switchgear (1), preferably a circuit breaker, especially a fault-current circuit breaker and/or a line safety switch. Said switchgear comprises at least one connecting terminal (2) with one connecting area (3) for receiving at least one terminal lead (4), preferably having a rectangular cross-section, especially of a contact (5) of a busbar (6). The aim of the invention is to facilitate a simple, straightforward and rapid installation or wiring of the switchgear, especially without tools such as, e.g., a screwdriver. For this purpose, the connecting terminal (2) comprises at least one spring (7) for applying a contact pressure which is effective in the direction of a closed position of the connecting area (3).

Description

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28972 / lh

The invention relates to a switching device, preferably circuit breaker, in particular residual current circuit breaker and / or circuit breaker, with at least one terminal with a clamping area for receiving at least one connecting conductor, preferably with a rectangular cross section, in particular a contact of a busbar.

Switchgear have terminals for connecting electrical conductors. These terminals include clamping screws for adjusting the clamping area and securing the connection in the clamping area.

A disadvantage of such switching devices that the installation or interconnection of such switching devices is very time consuming, complicated and error prone. Especially when interconnecting switching devices by means of so-called busbars closing the screw is the only essential work and the main source of error. In the case of a busbar, it is difficult to check whether the clamping screw of the terminal is not tightened in a switching device, since pulling on an otherwise firmly screwed busbar is inappropriate for checking the contact pressure on each switching device. This can lead to impairments of the power supply or damage to a switching device, such as excessive heating of a contact due to lack of contact pressure.

The object of the invention is therefore to provide a switching device of the type mentioned, with which the mentioned disadvantages can be avoided, and which allows a simple, straightforward and quick installation or interconnection, especially without tools such as screwdrivers.

According to the invention this is achieved in that the terminal comprises at least one spring, for applying a force acting in the direction of a closed position of the clamping area contact pressure.

As a result, connection conductors, in particular busbars or their contacts, without the use of tools in the terminals of the switching device can be securely and contact-resistant arranged or fixed. As a result, a quick and easy installation in particular of switching devices, which are arranged on a busbar possible. I · t · ···· · · · · · ··· · · · · ···········································

In continuation of the invention can be provided that the spring is designed as a helical spring. As a result, a particularly simple and cost-saving production is possible because coil springs are manufactured as mass-produced and no separate special treatment or special production is necessary.

In this context, it can be provided in the weather guide of the invention that a connecting conductor free clamping area is at least partially open. As a result, the imports of Anschlußleitem, in particular of contacts of a busbar is simplified.

According to a further embodiment of the invention, in a switching device in which the terminal comprises a clamping element fixed in the switching device and a substantially rectangular box, wherein the clamping element between a first box portion and a second box portion of the box is arranged, and wherein the clamping portion of the first Box region and a first clamping element side is limited, be provided that the spring between the second box portion and one, the first clamping element side arranged opposite, second clamping element side is arranged. As a result, a conventional screw, which is also known as a lift clamp, be used without alterations or modified construction, whereby both the manufacturing cost of the switching device is kept low, since the same housing and the same injection molds can be used, as in switchgear with screw terminals and also the terminals except for the springs used can be identical to the screw terminals. This saves parts and production costs and enables flexible production to be built up, which can react quickly and easily to changing customer requirements.

According to yet another embodiment of the invention, it may be provided that in the region of the first box area, a tab facing away from the clamping area is arranged on the box, in particular integrally formed. This prevents the insertion of a conductor into the space behind the terminal.

A variant of the invention may consist in that the clamping element is designed as a substantially rectangular frame, and the second box portion is disposed between a first frame portion comprising the first and second clamping element sides and a second frame portion substantially parallel thereto. As a result, the spring can be protected and damage to the terminal, especially in the field of manufacturing can be prevented. This may cause: • · · · · · · · · · · · · ···· • t · t · ··· Also, a terminal already present as a screw terminal can be used, with the advantages already described, such as the use of identical housing or injection molds, as well as to the spring identer terminals. This increases flexibility and reduces manufacturing and warehousing costs.

In a further embodiment of the invention can be provided in a switching device with a housing with Klemmöffhungen and Klemmschrauböffnungen that in the Klemmschrauböffhung a closure piece, preferably comprising insulating material, is arranged. As a result, the use of housings is possible, which are intended for use with screw terminals, whereby the unauthorized access to the terminals can be prevented.

In a further development of the invention can be provided that the closure piece has a Klemmöffiiungsfortsatz, which partially fills the Klemmöffhung. As a result, the use of housings is possible, which are intended for use with screw terminals, whereby the now no longer required area of Klemmöflnung can be covered and thus secured against unauthorized access.

Another possible embodiment may be that the second frame portion has at least one recess. Such a recess may already be present at a connection terminal which can also be used as a screw terminal, and be used for interaction with the closure piece.

In this context, it can be provided in a continuation of the invention that the closure piece has a clamping extension which presses through the recess on the at least in the region of the clamping extension recess-free second box area, wherein the clamping area is pressed. This can ensure that the clamping region is opened a certain range, whereby the insertion of a connecting conductor is substantially simplified, and the necessary pressures are reduced.

The invention will be described in more detail with reference to the accompanying drawings, in which particularly preferred embodiments are shown by way of example. Showing:

1 shows a first embodiment of a connection terminal for a switching device according to the invention;

2 shows a second embodiment of a connection terminal for a switching device according to the invention; ··· ········ # ♦ ···· • ······················ , ··· # Ml ·· ·· Λ ·

3 shows the embodiments according to FIGS. 1 and 2 with two busbars;

4 shows the embodiments according to FIGS. 1 and 2 with connecting conductors in the clamping regions;

Figure 5 shows a part of a switching device according to the invention with a second embodiment of a terminal in a partially sectioned view.

6 shows a part of a switching device according to the invention with a first embodiment of a terminal in a partially cutaway view;

7 shows a part of a switching device according to the invention in plan view;

8 shows a part of a switching device according to FIG. 7 in a side elevation in a partially sectioned illustration;

9 shows a switching device according to FIG. 7 in elevation; FIG.

FIG. 10 shows a switching device according to FIG. 7 in an axonometric illustration with the upper housing half lifted off; FIG.

11 shows the upper housing half of a switching device according to FIG. 10; and

Fig. 12 shows two axonometric views of a closure piece.

1 to 12 show different embodiments, details or parts of a switching device 1, preferably circuit breaker, in particular residual current circuit breaker and / or circuit breaker, with at least one terminal 2 with a clamping portion 3 for receiving at least one connecting conductor 4, preferably with a rectangular cross-section, in particular a contact 5 of a busbar 6, wherein the connection terminal 2 comprises at least one spring 7, for applying a contact pressure acting in the direction of a closed position of the clamping region 3.

As a result, connection conductors 4, in particular busbar 6 or their contacts 5, without the use of tools in the terminals 2 of the switching device 1 can be arranged and fixed securely and contact-resistant. As a result, a quick and easy installation, in particular of switching devices 1, which are arranged on a mounting rail is possible.

Switching devices 1 according to the invention may be any type of switching device 1. Preferably, circuit breakers, in particular residual current circuit breaker and / or circuit breaker are provided. ·· ♦ ···· ····················· · Β5 ·· ·

The spring 7 for applying the contact pressure may be any type of spring 7, such as leaf springs, Belleville springs and / or helical springs 8, in each embodiment or in combination with each other, both tension and compression springs. Particularly preferred is the use of so-called. Schraubdruckfedem.

Switching devices 1 according to the invention can be provided for the use of any type of connecting conductor 4, such as round wires, flat wires and / or plugs. In particular, the insert is provided together with so-called busbars 6. These busbars 6, as shown by way of example in FIG. 3, have connection conductors 4 at a predetermined spacing, the distances being selected such that they correspond to the spacing of the clamping openings 20 or clamping areas 3 of switching devices 1 arranged next to one another, so that a predefinable number arranged side by side switching devices 1 can be connected quickly and easily. The connecting conductors 4 of the busbars 6 generally have a substantially rectangular cross-section and can be chamfered or chamfered in the region for insertion into the connecting terminal 2.

Switching devices 1 according to the invention have at least one connection terminal 2 which has at least one clamping region 3. In particular, two terminals 2 are provided for each of the switching device 1 to be switched switching path, which must not necessarily be executed ident ident. In particular, it may be provided that different terminals 2 may be provided, such as those with clamping screws, as well as those with springs 7, for applying the necessary clamping forces for holding. In particular, it can be provided that the juxtaposed terminals 2 of a switching device 1 of the side by side arranged in the switching device 1 switching paths can be performed substantially ident.

The clamping region 3 of the terminal 2 may comprise at least a portion of the spring 7, or be formed by at least a portion of the spring 7. It may be provided that the connection terminal 2 comprises a substantially Ω-shaped bent leaf spring, wherein the clamping region 3 is formed by the narrow opening of the Ω-shaped bent leaf spring.

In order to simplify the insertion of the connection conductors 4, it may be provided that a connection conductor-free clamping region 3 is at least partially open. This simplifies the insertion of a connecting conductor 4 or reduces the forces necessary for insertion. In particular, it can be provided that the clamping area 3 is open for 0.1 to 0.5 mm................... Preferably, it can be provided that the cross section of the Ößhung formed by the OfFenstehen the clamping portion 3 is about 10% to 60% of the cross section of the connecting conductor 4, which is intended for use with the respective Schaltgerat 1. By the information available for each switching device 1 with regard to the currents to be switched, a ratio to the conductor cross-section can be produced, which is necessary for the corresponding currents. For keeping open the clamping area 3, any means can be provided. In particular, it is possible for example to provide a flexible band which wraps around the spring 7 and thus only permits a maximum extent of the spring 7. Particularly preferred may be provided a separate device for keeping the clamping area open, which will be explained elsewhere.

It is preferably provided that the spring 7 only applies the contact pressure acting in the direction of a closing pitch of the clamping region 3. In the first and second particularly preferred embodiment of a terminal 2, 26, 27, as shown in FIGS. 1 to 4, a clamping element 9 and a movable box 10 are provided, which form the clamping region 3. Both the first preferred embodiment of a terminal 2, 26 of FIG. 1, and the second preferred embodiment of a terminal 2, 27 of FIG. 2 have as a basis conventional screw terminals, which are also known under the names cage terminal or Lifiklemme. The spring 7 takes over in the preferred first and second preferred embodiment of a terminal 2, 26, 27 only the task, otherwise a clamping screw zufallende task to provide the necessary contact pressure.

The preferred first and second embodiment of a connection terminal 2, 26, 27 has a fixed clamping element 9 in the switching device 1 and a substantially rectangular box 10, wherein the clamping element 9 is arranged between a first box portion 11 and a second box portion 12 of the box 10, and wherein the clamping region 3 is delimited by the first box portion 11 and a first clamping element side 13, the spring 7 being arranged between the second box portion 12 and a second clamping element side 14 arranged opposite the first clamping element side 13.

The clamping element 9 is in the first preferred embodiment of a connecting terminal 2, 26 as a substantially straight sheet-metal strip, in particular comprise steel, copper and / or copper alloys, in particular brass, which is in the ······· ···· · ·················································································

Switching device 1 immovable, in particular in the region of a clamping tunnel, is arranged, for example by clamping between projections on the Klemstunnelinnenwandung.

The box 10 is a preferably, and as shown, substantially rectangular member, which preferably consists of a four times by about 90 ° angled metal strip, in particular strips comprising steel, copper and / or copper alloys, such as brass. Preferably, the box 10 has an overlapping area. It can be provided that the box 10 is connected to form a torsionally rigid unit, in particular in the overlapping area, in particular welded or riveted.

It can be provided, as in the second preferred embodiment of a terminal 2, 27 that the clamping element 9 is formed as a substantially rectangular frame 16, and the second box portion 12 between a, the first and second clamping element side 13, 14 comprising the first frame portion 17 and a, for this substantially parallel, second frame portion 18 is arranged. As shown in FIGS. 2 to 4, but especially FIGS. 5 and 8, the frame 16 is a strip which is preferably angled three times by substantially 90 °. The clamping element 9 is extended and wraps around the movable box 10, wherein a preferably closed frame 16 is formed by a substantially rectangular cross-section. The frame 16 is rotated relative to the box 10 by 90 ° and hung in this. As in the case of the first embodiment of a connection terminal 2, 26, in this embodiment too, the clamping region 3 is bounded or bounded by the first box region 11 and a first clamping element side 13, wherein the first clamping element side 13 is part of the first frame region 17.

In order to prevent an import of Anschlussleitem 4 and / or tools in a room behind the terminal 2 can be provided that in the region of the first box portion 11, the clamping region 3 facing away, flap 15 is disposed on the box 10, in particular integrally formed ,

In particular, in order to continue to be able to use already existing housing 19, which are provided for Schraubanschlussklemmen in switching devices 1 according to the invention, in which switching devices 1 with housings 19 which Klemmschrauböffhungen 21, and Klemmöffhungen 20, in particular additional Klemmöffhungen 20 for clamping so-called. be provided that in the Klemmschrauböffiiung 21 a closure piece 22, preferably comprising insulating material, ··· ··· ♦ 9999 ·· 9999 • · ··· ··· * • # * 9 9 9 9 9 999 · · ··· · · · * ···· · · ......... 8 ·· · is arranged. As a result, the same housing 19 can be used as before, without the risk of unauthorized access by a no longer necessary Klemmschrauböffnung 21. As a result, significant costs can be saved because no new injection mold for a new housing 19 is necessary.

5 to 8 show switching devices 1 with a preferred embodiment of a closure piece 22. Figs. 10 and 11 show axonometric representations of a switching device 1 and a housing part 19 of a switching device 1 with the preferred embodiment of the closure piece 22. Fig. 12 shows two Axonometric representations of the preferred embodiment of the closure piece 22. It may preferably be provided that the closure piece 22 is formed such that it is able to fill the space or space available through the non-existent clamping screw.

In particular, it can be provided that the closure piece 22 has a Klemmöffhungsfortsatz 23 which fills the Klemmöffiiung 20 partially. As a result, unnecessary Klemmöfihungen 20, which were intended for about cable lugs, which should be clamped between the head of a clamping screw and the clamping element 9, are completely closed, whereby access, or the ingress of foreign bodies and dirt is prevented.

As already stated, it may be advantageous if the clamping region 3 of the terminal 2 is not completely closed, whereby the insertion of a connecting conductor 4 is simplified. Therefore, it can be provided in switching devices 1, which have a terminal 2, wherein the second frame portion 18 has at least one recess 24, that the closure piece 22 has a clamping extension 25, which passes through the recess 24 on the, at least in the region Clamp extension 25 recess-free, second box portion 12 presses, wherein the clamping portion 3 is pressed. 8 shows such an arrangement in which the clamping extension 25 presses through the recess 24 against the box 10, thus opening the clamping area 3, whereby the introduction of a connecting conductor 4 is simplified.

Further embodiments according to the invention have only a part of the features described, wherein each feature combination, in particular also of various described embodiments, can be provided.

claims:

Claims (10)

········································································································································································ Dr.techn. FERDINAND GIBLER Representative before the European Patent Office A-1010 WIEN Dorotheetgasse 7 Phone: (-43-1-) 512 10 98 Fax: (-43-1) 513 47 76 • · • · 9 28972 / lh PATENT CLAIMS 1. Switching device (1 ), preferably circuit breaker, in particular residual current circuit breaker and / or circuit breaker, with at least one terminal (2) with a clamping region (3) for receiving at least one connecting conductor (4), preferably with a rectangular cross-section, in particular a contact (5) of a busbar (6) , characterized in that the connection terminal (2) comprises at least one spring (7) for applying a contact pressure acting in the direction of a closed position of the clamping region (3). 2. Switching device (1) according to claim 1, characterized in that the spring (7) is designed as a helical spring (8). 3. Switching device (1) according to claim 1 or 2, characterized in that a connecting conductor free clamping region (3) is at least partially open. 4. Switching device (1) according to one of claims 1 to 3, wherein the connecting terminal (2) in the switching device (1) fixed clamping element (9) and a substantially rectangular box (10), wherein the clamping element (9) between a first box area (11) and a second box area (12) of the box (10) is arranged, and wherein the clamping area (3) from the first box portion (11) and a first clamping element side (13) is limited, characterized in that the spring ( 7) between the second box portion (12) and one, the first clamping element side (13) arranged opposite, second clamping element side (14) is arranged. • t ···································································· 5. Switching device (1) according to claim 4, characterized in that in the region of the first box portion (11), the clamping region (3) facing away from, lobes (15) on the box (10) is arranged, in particular integrally formed. 6. Switching device (1) according to claim 4 or 5, characterized in that the clamping element (9) as a substantially rectangular frame (16) is formed, and the second box portion (12) between one, the first and second clamping element side (13, 14) comprising a first frame portion (17) and a, for this substantially parallel, second frame portion (18) is arranged. 7. Switching device (1) according to one of claims 1 to 6, comprising a housing (19) with Klemmöffhungen (20) and Klemmschrauböffnungen (21), characterized in that in the Klemmschrauböffnung (21) a closure piece (22), preferably comprising insulating material , is arranged. 8. Switching device (1) according to claim 7, characterized in that the closure piece (22) has a Klemmöfihungsfortsatz (23) which fills the Klemmöffiiung (20) partially. 9. Switching device (1) according to one of claims 6 to 8, characterized in that the second frame region (18) has at least one recess (24). 10. Switching device (1) according to claim 9, characterized in that the closure piece (22) has a clamping extension (25) which passes through the recess (24) on the, at least in the region of the clamping extension (25) recess-free, second box area (25). 12) presses, wherein the clamping area (3) is pressed.