EP1990879A1 - Single mounting carrier for mounting an overload relay - Google Patents

Abstract

The itemized holder (1) has three lead-throughs (2,3,4) for receiving an electrical contact of the overload relay and accommodates an electrical line of an electrical equipment. The holder has a spring clamping element for fixing and electrical contacting of an electrical contact of the overload relay. The spring clamp element attaches and electrically contacts the electrical line from an electrical equipment.

Description

The present invention relates to a stand-alone support for fastening an overload relay, having at least a first passage for receiving at least one electrical contact of the overload relay and at least one second passage for receiving at least one electrical line from an electrical device, wherein the at least one first implementation and the at least a second implementation are arranged in the individual installation support such that the at least one electrical contact of the overload relay with the at least one electrical line can be electrically conductively connected to each other.

Overload relays take over motor protection in the "contactor overload relay" switching combination and are usually used, i. in about 85% of cases, directly connected to the contactor. This happens with overload relays with screw terminals directly via the terminals. The overload relay is thus electrically and mechanically coupled to the contactor. A contactor is an electromagnetically actuated switch. A control current flows through a magnetic coil, whereby a contact is mechanically actuated by the magnetic attraction, which closes the main circuit. Contactors have been developed, inter alia, a consumer with high power consumption, such as a motor turn on a hand-operated pushbutton switch with low switching capacity. Basically, a contactor is a relay, but with much higher switching capacity.

It is also known that overload relays with screw terminals are set up individually by means of a carrier because, for example, the contactor overload relay combination in the cabinet for reasons of space, for example, because of too high height, can not be plugged. That is, with overload relays with screw terminals, the requirement for individual installation with so-called Single display carriers solved. The overload relay is plugged onto the carrier and locked mechanically, with the electrical contacts, usually in the form of plug pins, immersed in the contactor terminal. By tightening the screw terminal, the electrical connection with the customer's line is made.

It is also known to connect overload relay with cage spring terminals directly to a contactor. Here, the electrical contact of the overload relay is made to the contactor by cage tension springs. The disadvantage of such direct connections that they can not always be realized due to lack of space. Thus, in a control cabinet for reasons of space, for example because of excessive height, it may be possible that an overload relay with cage spring terminals is not plugged onto a contactor.

The present invention has for its object to provide an adapter which connects an overload relay with cage spring terminals with an electrical device, in particular with a contactor, electrically conductive, wherein the overload relay individually, i. separated from the electrical device, can be placed. In this case, the connection of the overload relay and the connection of the electrical device to the adapter should be made particularly easy and fast.

This object is achieved by a Einzelaufstellungssträger with the features according to independent claim 1. Further features and details of the invention will become apparent from the dependent claims, the description and the drawings.

According to the invention, the object is achieved by a stand-alone support for fastening an overload relay, having at least a first passage for receiving at least one electrical contact of the overload relay and at least one second passage for receiving at least one electrical line from an electrical device, wherein the at least one first implementation and the at least one second implementation are arranged in the individual installation support such that the at least one electrical contact of the overload relay with the at least one electrical line can be electrically conductively connected to each other, wherein the Einzelaufstellsträger at least one spring clamping element for fastening and electrical contacting of the has at least one electrical contact of the overload relay and for attachment and electrical contacting of the at least one electrical line of the electrical device, solved.

The core of the invention is to be able to set up overload relays with cage spring terminals individually, if space reasons a direct connection to an electrical device, such as a contactor, is not possible. In this case, an overload relay with cage spring terminals, with electrical contacts, in particular with plug pins, can be constructed by such a single installation carrier in a simple manner to a single installation. The conversion from a single installation to a direct contactor installation can be just as easy.

The stand-alone support forms the adapter between the overload relay and an electrical line of an electrical device, in particular an electromagnetic switching device, such as a contactor. The individual installation carrier has at least one first passage for receiving at least one electrical contact of the overload relay and at least one second passage for receiving at least one electrical line from an electrical device. The at least one first bushing and the at least one second bushing are arranged in the individual mounting carrier in such a way that the at least one electrical contact of the overload relay with the at least one electrical line can be electrically connected to one another. The simple and quick connection of the overload relay to the stand-alone support is provided by the Spring clip reached. The spring clamp allows a simple, safe and fast to produce attachment and electrical contact of the at least one electrical contact of the overload relay. Furthermore, such a spring clamping element allows a simple, safe and fast to produce attachment and electrical contacting of the at least one electrical line. The spring clamping element may preferably be a cage tension spring. Such a cage tension spring has two receptacles for clamping the end of the electrical line and for clamping the electrical contact of the overload relay. The cage tension thus represents a Doppelkäfigzugfeder.

In this case, the electrical contact of the overload relay and the end of the electrical line to the spring clamping element may be arranged such that they form a direct contact with each other after attachment to the spring clamping element. The electrical contact of the overload relay and the end of the electrical line can also be electrically connected to one another via an intermediate conductor on the spring clamping element.

The electrical contacts of the overload relay are designed in particular in the form of plug pins. The first implementation of the individual placement carrier receives the electrical contacts, in particular the pins, the overload relay such that they contact the spring clamp element of the single installation carrier and can be attached to the spring clamp element. The second implementation allows the passage of the end of an electrical line or an electrical cable until the end of the line can be attached to the spring clamp element and is electrically connected to the electrical contacts, in particular the plug pins, the overload relay. By using the same spring clamp element for fastening and contacting the electrical contact, in particular the plug pin, the overload relay and for fastening and contacting the end of the electrical line can in particular Material costs are saved. The spring clamp element is a so-called double spring clamp element.

Preferably, the individual installation support has a plurality of spring clamping elements, so that at the same time a plurality of electrical contacts of an overload relay can be connected to a plurality of electrical lines.

Also preferred is a single installation carrier, in which at least one spring clamping element is associated with a plug contact for making electrical contact with the at least one electrical contact of the overload relay. This variant of the single installation carrier is an alternative to the so-called double spring clamp element. In such a single installation carrier, the end of the electrical line to the spring clamp element and the at least one electrical contact of the overload relay is attached to the plug contact. The plug contact is associated with the spring clamp, i. the plug contact is electrically connected to the spring clamp element. This alternative embodiment of the unitisation carrier, i. a spring clamping element for attaching and contacting the electrical line of an electrical device and a spring contact element associated plug contact, is advantageous if the electrical contacts of the overload relay are designed as plug pins. The spring clamping element is then designed as a simple cage tension spring, and not as Doppelkäfigzugfeder, which also costs can be saved.

It is advantageous if the plug contact of the individual placement carrier has a spring clamping element, in particular a cage tension spring, a lyre contact with or without additional spring, a leaf spring, a compression spring or a socket contact, such as a banana plug. That is, the at least one electrical contact of the overload relay can be attached to a first cage-type tension spring and the end of the electrical line can be fixed / contacted on a second cage-type tension spring, wherein both spring-clamping element are electrically conductive connected to each other. This can be done by a direct contact of the two spring clamp elements or by connecting the two spring clamp elements intermediate conductor. Another preferred embodiment of the individual placement carrier provides that the at least one electrical contact of the overload relay is arranged on a cage tension spring and the end of the electrical line is arranged on a lyre contact associated with the cage tension spring. This combination allows a simple, fast and safe electrical contacting and attaching at least one electrical line of at least one electrical device, such as a contactor, as well as at least one electrical contact of an overload relay.

The individual installation support advantageously has at least one third passage for passing an actuating tool for actuating the at least one spring clamping element. The actuating tool serves to deflect the spring clamping element, in particular the cage tension spring, so that a recess in the spring clamping element can be arranged in alignment with the first or the second feedthrough of the individual positioning carrier in order to receive the electrical contact or the electric line. After removal of the actuating tool, the spring clamping element clamps due to its spring force guided by the corresponding recess electrical contact of the overload relay or guided through the corresponding recess end of the electrical line. An operating tool inserted through the third bushing enables the attachment and release of the electrical contact of the overload relay or the electrical line to and from the spring clamping element.

The individual installation carrier preferably has fastening elements for fastening the overload relay. As a result, the overload relay is securely held on the stand-alone support. The fastening elements may be formed, for example in the form of locking elements. The overload relay is plugged onto the individual installation carrier and locked mechanically, wherein the at least one electrical contact of the overload relay, in particular designed as a plug pin, immersed in the first implementation of the Einzelaufstellungssträgers and electrically contacted the spring clamp element. The individual installation support furthermore preferably has receptacles for the positive reception of projections of the overload relay. These provide additional fixation of the overload relay to the stand-alone support. The recordings may be in the form of depressions or grooves.

Furthermore, a single installation support is preferred, which has a device for fastening the individual installation carrier to a DIN rail. As a result, the individual installation support can be easily attached to a corresponding DIN rail.

The individual installation support further preferably has bores for fastening the individual installation support to a mounting plate. The holes represent an alternative means of attachment to the device for attachment of the Einzelaufstellungssträgers on a top hat rail. The individual installation support can be attached through the holes on other objects, as a mounting plate.

FIG 1

ein Überlastrelais, welches direkt mittels Schraubklemmen an einen Schütz angeordnet ist;

FIG 2

einen Einzelaufstellungsträger, der zur Aufnahme eines Überlastrelais ausgebildet ist;

FIG 3

einen Einzelaufstellungsträger mit einem fast aufgesteckten Überlastrelais;

FIG 4

einen Einzelaufstellungsträger mit einem aufgesteckten Überlastrelais;

FIG 5

eine Frontansicht auf einen Einzelaufstellungsträger mit einem aufgesteckten Überlastrelais;

FIG 6

eine Frontansicht auf einen Einzelaufstellungsträger;

FIG 7

eine Schnittdarstellung des Klemmbereiches eines Einzelaufstellungsträgers für einen Anschluss einer elektrischen Leitung;

FIG 8

eine Schnittdarstellung des Klemmbereiches eines Einzelaufstellungsträgers für einen Anschluss eines Überlastrelais.

The invention will now be explained in more detail by means of embodiments with reference to the accompanying drawings.
Show it:

FIG. 1

an overload relay, which is arranged directly by means of screw terminals to a contactor;

FIG. 2

a stand-alone support adapted to receive an overload relay;

FIG. 3

a stand-alone support with an almost plugged overload relay;

FIG. 4

a stand-alone support with a plugged overload relay;

FIG. 5

a front view of a stand-alone support with a plugged overload relay;

FIG. 6

a front view of a stand-alone support;

FIG. 7

a sectional view of the clamping region of a Einzelaufstellungssträgers for a connection of an electrical line;

FIG. 8

a sectional view of the clamping region of a single installation carrier for connection of an overload relay.

In the FIG. 1 is an overload relay 20, which is arranged directly by means of screw terminals to a contactor 40, shown. This compound is known in the art. The overload relay 20 has screwdriver guides 22, are passed through the screw, which are screwed into corresponding holes in the contactor 40 to electrically connect the plug pins of the overload relay 20 with the contactor 40. This attachment of the overload relay 20 to the contactor 40 has the disadvantage that sufficient space for attachment of the overload relay 20 must be present on the contactor 40. Since in a cabinet in which such contactors 40 are arranged, there is often a lack of space, it may happen that such a direct attachment of the overload relay 20 to the contactor 40 is not possible. Another disadvantage of screw terminals is the complicated or difficult attachment due to the often prevailing lack of space in a control cabinet.

In the FIG. 2 is a possible embodiment of a single installation carrier 1, which is designed to receive an overload relay 20 with cage spring terminals shown. The individual installation support 1 has first passages 2 for receiving electrical contacts 21 of an overload relay 20. By passing the electrical contacts 21 of the overload relay 20, which are usually designed in the form of plug pins, the electrical contacts 21st the overload relay 20, each with a plug-in contact 12 of the Einzelaufstellungssträgers 1, each associated with a spring clamp element 10, contacted and attached to these plug contacts 12.

The individual installation support 1 also has second passages 3 through which one end of an electrical line 30 of an electrical device, such as a contactor, can be guided to a spring clamping element 10. The ends of the electric wires 30 electrically contact and are fixed to the respective spring clamping members 10. Each spring clamp element 10 is assigned a plug contact 12. In other words, the plug contact 12 assigned to a spring clamping element 10 is electrically conductively connected to this spring clamping element 10. As a result, each electrical contact 21 of the overload relay 20 can be connected to an electrical line 20 of a contactor. The plug contacts 12 are preferably also designed as spring clamp elements. Thus, the plug contacts 12 in the form of cage tension springs, Lyra contacts with or without additional spring, leaf springs, compression springs, socket contacts, such as banana plugs, etc. may be formed.

The individual installation support 1 also has third passages 4, through which an actuating tool can be passed to a spring clamping element 10. The actuating tool can deflect by passing through a third passage 4, the cage tension spring 11 so that they can receive the end of an electrical line 30 and clamp or release and release. As an operating tool usually acts as a screwdriver.

The individual installation support 1 according to FIG. 1 has a device 7 for attachment of the Einzelaufstellungssträgers 1 on a DIN rail. As a result, the individual placement support 1 can be easily, quickly and securely attached to a DIN rail. In this case, the device 7 locks for attachment of the individual installation carrier 1 on a DIN rail on the DIN rail. The individual installation support 1 also has Fastening elements 5 for fastening the overload relay 20. The fastening elements 5 can be designed in various ways. Thus, it is conceivable that the fastening elements 5 are designed as screw connections. In the FIG. 1 the fastening elements 5 are formed as latching elements. In this case, the individual installation support 1 has a latching hook, which can engage in a corresponding receptacle on the overload relay 20. Furthermore, the individual installation support 1 bores 8 for attachment of the Einzelaufstellungssträgers 1 on a mounting plate. That is, as an alternative to attachment of the single installation carrier 1 on a DIN rail, the individual installation support 1 can be attached to another object, such as a mounting plate. This is preferably done by fastening screws which are screwed through the holes 8 of the individual installation carrier 1 in the objects, in particular a mounting plate.

In the FIG. 3 a stand-alone support 1 with an almost plugged overload relay 20 is shown. Evident are the electrical contacts 21 of the overload relay 20, which are introduced into the first passages 2 of the individual placement carrier 1. The electrical contacts 21 of the overload relay 20 are formed in this embodiment of the overload relay 20 as plug pins. The overload relay 20 is positively plugged onto the individual installation support 1 and fastened by the fastening elements 5 on this. The FIG. 4 shows an overload relay 20 plugged onto a stand-alone support 1. The electrical contacts 21 of the overload relay 20 are inserted deeply into the first feedthroughs 2 of the individual placement support 1 and contact the plug-in contacts 12. After attaching the overload relay 20 to the stand-alone support 1, the second and third remain Bushings 3 and 4 freely accessible. The ends of electrical leads 30 of a contactor can be inserted into the second feedthroughs. This is done with the help of an executable through the third passages 4 operating tool.

In the FIG. 5 is a front view of a stand-alone support 1 with a plugged overload relay 20 is shown. The first passages 2 are covered by the electrical contacts 21 and by the devices holding the electrical contacts 21. The second bushings 3 for receiving one end of an electrical line 30 and the third bushings for receiving the actuating tool are not covered by the overload relay. As a result, the electrical leads 30 of an electrical device after attachment of the overload relay 20 can be attached to the stand-alone support 1 at this.

The FIG. 6 shows a front view of a stand-alone support 1 without plugged overload relay 20. The first feedthroughs 2 for receiving the electrical contacts 21 of the overload relay 20 are arranged offset to the bushings 3 and 4 for receiving the ends of the lines 30 and the actuating tool. Furthermore, the fastening element 5 of the individual placement carrier 1 is shown.

The FIG. 7 shows a sectional view of the clamping region of a single installation carrier 1 for a connection of an electrical line 30. The end of the electrical line 30 can be passed through the second passage 3 and on the spring clamp element 10, here in the form of a cage clamp 11, clamped and contacted electrically conductive become. For actuating the spring clamping element 10, ie for deflecting the cage tension spring, an actuating tool can be passed through the third passage 4, to engage behind the cage tension spring 11 and deflect.

The FIG. 8 shows a sectional view of the clamping region of a single installation carrier 1 for a connection of an overload relay 20. The electrical contact 21 of the overload relay 20 is through the first passage 2 of the individual installation carrier 1 has been passed and electrically contacted and secured to the plug contact 12 of the spring clamping element 10.

Claims (8)

Individual installation support for fastening an overload relay (20), with at least one first feedthrough (2) for receiving at least one electrical contact (21) of the overload relay (20) and with at least one second feedthrough (3) for receiving at least one electrical lead (30) an electrical device, wherein the at least one first feedthrough (2) and the at least one second feedthrough (3) are arranged in the stand-alone support (1), that the at least one electrical contact (21) of the overload relay (20) with the at least one electrical line (30) can be electrically conductively connected to each other, characterized in that the Einzelaufstellsträger (1) at least one spring clamp element (10) for attachment and electrical contacting of at least one electrical contact (21) of the overload relay (20) and for fastening and electrical Contacting the at least one electrical line (30) of the having electrical device. Individual installation support according to claim 1, characterized in that the spring clamping element (10) is a cage tension spring (11). Stand-alone support according to claim 1 or 2, characterized in that the at least one spring clamping element (10) is associated with a plug contact (12) for electrically contacting the at least one electrical contact (21) of the overload relay (20) Individual installation support according to claim 3, characterized in that the plug contact (12) has a spring clamping element, in particular a cage tension spring, a lyre contact or a socket contact. Individual installation support according to one of claims 1 to 4, characterized in that the individual installation support (1) at least a third passage (4) for passing an actuating tool for actuating the at least one spring clamping element (10). Individual installation support according to one of claims 1 to 5, characterized in that the individual installation support (1) has fastening elements (5) for fastening the overload relay (20). Individual installation support according to one of claims 1 to 6, characterized in that the individual installation support (1) has a device (7) for fastening the individual installation support (1) on a DIN rail. Individual installation support according to one of claims 1 to 7, characterized in that the individual installation support (1) has bores (8) for fastening the individual installation support (1) to a mounting plate.

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