EP1341280B1 - Overvoltage arrester arrangement, in particular for telecommunication devices; overvoltage arrester module and earth connection arrangement for a chopping strip - Google Patents

Abstract

The arrangement has at least one isolating strip with plug contacts in a pattern, at least one earth contact or point, an excess voltage protection module for double wires of the isolating strip, a wiring carrier, especially a circuit board, with contact pins on one end corresponding to the plug contact pattern, excess voltage drains wired in accordance with a protection circuit and at least one earth connection in the contact pin plane. Independent claims are also included for the following: an excess voltage protection module and an earthing arrangement.

Description

The invention relates to an overvoltage protection arrangement, in particular for telecommunications equipment and / or systems, which have at least one disconnect strip with plug contacts in the grid and wherein the disconnect strip has at least one ground contact or grounding point, according to the preamble of claim 1. Furthermore, the invention relates to a Overvoltage protection module, in particular for an overvoltage protection arrangement for telecommunication devices, as well as a grounding arrangement for a disconnect strip, which in turn can be used in particular for an overvoltage protection arrangement for telecommunication devices.

From the German utility model DE 200 02 378 U1 a protection module for telecommunications technology is known, which has tapping contacts for forming an electrically conductive connection with the contacts of a connection module of the telecommunications technology and can be combined accordingly. There, at least one overvoltage protection component is provided, which is connected either directly via its contact legs, which extend parallel to a contact slot formed in the associated tapping contact, or via an adapter in an electrically conductive manner with the tapping contacts. According to local solution, all tapping contacts should be substantially flat.
However, the space required for the protection module is considerable and there are problems in the formation of particularly current carrying earthing connections.

With regard to the earthing problem, the overvoltage protection magazine has yielded DE 199 17 824 A1 a housing containing a plurality of surge arresters, the each have a ground contact. Furthermore, a ground rail is present, which is conductively connected to the ground contacts. An earth tap is subsequently attachable to the exception of the ground tap itself fully assembled surge protection magazine so that a contact with the ground rail is made. The ground tap is latched designed, wherein on the housing of the overvoltage protection magazine, a latching hook is provided which engages in a formed in the Erdabgriff recess when the ground tap is inserted at the designated location in the surge memory magazine.

Terminal strips for telecommunications technology belong to the prior art and are for example from the DE 200 00 506 U1 previously known. Such terminal strips may also have an integrated grounding section or a grounding element having at least one contact area for forming an electrically conductive connection with an overvoltage protection component and further contacts for forming an electrically conductive connection with different carrier systems. Specifically, the terminal block after DE 200 00 506 U1 two laterally integrated earth contacts, so that a plugged overvoltage protection module also receives the necessary connection to ground or earth.

At the overvoltage protection magazine after WO 99/56361 a housing is provided which consists of a plurality of individual parts, wherein a plurality of tapping contacts with a portion extends from the rear side of the housing and in the attached state picks up contacts of the device of the telecommunications technique. Also, a ground contact is provided there and it can be used in the overvoltage protection magazine several over-voltage arrester, which have legs which are directly electrically conductively connected in the inserted state with the corresponding contacts. The local structure, in particular with regard to the use of the individual overvoltage protection elements is very time-consuming, since it is not readily possible to contact all the elements provided simultaneously in one step not cohesively.

A similar arrangement of a protective plug for a telecommunications device discloses the WO 99/54965 ,
There, the overvoltage protection components are fixed without circuit board directly via clamping slots on the contacts.

From the above, it is therefore Object of the invention to provide a special overvoltage protection module that includes energetically coordinated overvoltage arrester in the smallest space, each forming a group for several pairs of a known separation bar.

Another object of the invention is to provide an overvoltage protection arrangement, with this overvoltage protection module, in particular for telecommunications equipment and / or installations, which is generally inexpensive to produce, which has the required current carrying capacity and without further and easily replaced can.

Basically, it is the overvoltage protection arrangement and in particular the overvoltage protection module in such a way that this is suitable for miniaturized connection technology, in particular, reference should be made here to the so-called RCT (Rapid Contact Technology).

The object of the invention is achieved with an overvoltage protection module, according to the features of patent claim 1, with an overvoltage protection arrangement, in particular for telecommunications devices according to the features of claim 2, wherein the dependent claims represent at least expedient refinements and developments.

The overvoltage protection arrangement according to the invention, in particular for telecommunications equipment and / or systems, is based on a known separation strip, in particular for the so-called RCT connection technology. Such a separator strip has plug contacts in pitch and also has the ability to carry ground connections.

According to the invention, an overvoltage protection module is provided for a plurality of double cores of the disconnection strip, wherein the overvoltage protection module has a wiring carrier, in particular a printed circuit board.

The printed circuit board has at one end quasi integral contact pins corresponding to the pitch of the plug contacts of the separator bar and carries a group of energetically coordinated surge arresters, which according to the respective Protective circuit are wired. These overvoltage arresters include, for example, varistors and gas arresters.

The overvoltage protection module has at least one ground terminal, which lies in the plane of the contact pins, and is surrounded by a housing which leaves free only or at least the sections of the ground terminal and the contact pins.

The overvoltage protection module can now be inserted from above into the corresponding plug contacts of the disconnect strip and fixed there, whereby even with plugged surge arrester or module the routing of outgoing wires is easily possible and the labeling of the bar remains visible.

According to the invention, one or more overvoltage protection modules can be plugged into the disconnect strip, wherein the electrical connection between the plug contacts and the contact pins on the one hand and the ground terminal and the ground contact on the other hand is formed by the insertion.

The grounding contact within the disconnect strip has a grounding strap which has at least two notched or bent tabs which engage in slot-shaped recesses of the disconnector base body. The tabs are preferably located laterally next to a group of plug contacts. The grounding bracket also has contact claws for making the outer earth connection, for example via a mounting trough or the like means. The grounding strap with the tabs and the contact claws can be subsequently inserted into the disconnector base body.
Alternatively, the earthing bar can already be located in the mounting trough and positioning the grounding bar in the slot-shaped recesses is achieved by attaching the disconnecting bar.

The overvoltage protection module according to the invention, which can be used in particular for the above-mentioned overvoltage protection arrangement for telecommunications devices with disconnect strips, consists of a printed circuit board which has a wiring substrate for both semiconductor and Gasabieiter overvoltage protection components, which are electrically connected in an electrically coordinated manner , forms.

In particular, the gas discharge are absorbed by a fixing body, which has recesses corresponding to the outer dimensions of the respective gas discharge.
The fixing body has on its bottom side openings, each receiving a terminal contact wire of the respective gas discharge. The guided through the openings gas arrester Anschlußkontaktdrähte be connected to corresponding contact surfaces on the circuit board by soldering.
According to the invention a common contact plate for the mating contacts of the gas discharge is provided, wherein the contact plate corresponding to the position of the mating contacts recesses with spring clamp, so that when mounting the contact plate all mating contacts are electrically connected together in one step.

The contact plate has angled tongues, wherein at least one tongue forms a grounding connection and at least one further tongue surrounds the fixing body externally and is force-bonded or materially connected to a grounding connection point on the circuit board side.

At one end of the circuit board contact pins are formed or the circuit board itself is structured so that several quasi-integral pins arise. The pin distance then corresponds to the predetermined pitch of the separator bar or provided there mother contacts. The at least one tongue for the ground terminal is laterally adjacent to the contact pins, such that a ground contact with the tabs of the grounding strap can be made.

The gas discharge tubes extend with their connections substantially perpendicular to the printed circuit board plane, wherein the contact pins lie in the printed circuit board plane itself or run accordingly.

In a preferred embodiment, the contact plate may have two laterally opposite, outer grounding connection tongues and two inner tongues which laterally surround the fixing element. The contact plate is preferably designed as a metallic stamped and bent part, wherein each recess for the mating contacts of the gas discharge has a plurality of center-oriented spring claws, which enter into a force / form closure with the respective lead wire of the arrester.

The contact pins of the circuit board and the at least one tongue for the ground terminal forming means are designed as father contacts.

The spring claws of the contact plate can each form a plate spring, which opposes the lead wire during insertion a mechanical resistance, so that a secure, low-resistance and permanent electrical contact is given.

The fixing body consists of an insulating plastic and the recesses are designed as multi-row chambers. Furthermore, the fixing body on lateral extensions, which surround the circuit board leader in a lateral section. Also, the side wall of the fixing body has at least one groove for receiving the at least one further tongue.

The fixing body can be prefabricated with gas discharge tubes form a corresponding mounting aid.

The grounding arrangement for a disconnect strip, in particular for an overvoltage protection arrangement, is based on a disconnector base body which has a plurality of slot-shaped recesses spaced apart in the grid. An intended earthing strap comprises tabs which are guided on insertion into the recesses of the base body of these. The grounding bar also has contact claws or protrusions connected to ground. This ground connection can be made, for example, via a disconnect holder or disconnector mounting trough.

With the overvoltage protection module described above, comprising a contact plate with spring elements, all fitted gas discharge are connected to the contact plate when attaching the contact plate on the circuit board. The contact plate is as set forth so that it represents the grounding point for the overvoltage protection device suitable for disconnect strips of the rapid-contact system.

The side tabs or tongues hold the contact plate to the circuit board and at the same time form an electrical connection.

The contact plate of solid metal, the desired high surge current carrying capacity of the arrangement is achieved with simultaneous mechanical stability.

The invention will be explained below with reference to an embodiment and with the aid of figures.

Hereby show:

Fig. 1

a perspective view of the contact plate for the overvoltage protection module;

Fig. 2

an illustration of the circuit board with already equipped gas arresters and semiconductor overvoltage protection components;

Fig. 3

a representation of the overvoltage protection module with plugged contact plate; and

Fig. 4

a compilation of the overvoltage protection arrangement consisting of earthing bar, known per se and overvoltage protection module.

That in the Fig. 1 shown contact plate 1 is designed as a metal stamped and bent part and has rear tongues 4, which the fixing body 5 (FIG. Fig. 3 ) and embrace the printed circuit board 2.

For this purpose, the rear tongues 4 have a lower, inwardly directed crank. The area of this offset then forms at the same time a solder joint section with a connection field located on the underside of the printed circuit board 2.

Furthermore, front tongues 6 are integrally formed on the contact plate 1, which form the ground terminal.

The top surface of the contact plate 1 comprises recesses 7, each receiving a lead wire of a gas discharge tube 3.

The region of the recesses 7 in the contact plate 1 is provided with spring-clamping properties or even forms a plate spring.

The lateral Kröpfungsmaß the front tongues 6 is adapted to the width of the circuit board 2 and located at one end there contact pins 8.

Fig. 3 makes it clear that the front tongues 6 are laterally spaced by an insulating extension 9 of the fixing body 5 held by the contact pins 8.

The front tongues 6 can then come into contact with corresponding tabs 12 of a grounding strap 13 when inserting the complete module 10 into a known separating strip 11.

In addition to the Gasableitern 3 are more appropriately energetically coordinated selected and interconnected semiconductor overvoltage protection devices 14 on the circuit board. 2

As from the sequence of Fig. 2 and 3 can be seen, the contact plate 1 is placed from above on the fixing body 5 and contacted in one step, all the connecting wires of the gas discharge. 3

The fixing body 5 has a plurality of recesses which are matched to the outer dimensions of the respective gas discharge tube, and comprises bottom side openings (not shown), each receiving the other terminal contact wire. These other terminal contact wires are then connected by soldering to corresponding contact pads located on the back of the circuit board.

The gas discharge 3 are with their connections substantially perpendicular to the plane of the circuit board 2, wherein the contact pins 8 extend in circuit board plane.

Like in the Fig. 4 shown, a grounding strap 13 is inserted into the separator bar 11 of a rapid-contact system. The formed on the grounding bow 13, for example, notched tabs 12 provide for each complete module 10 two grounding points available.

When attaching the separator strip 11 on the mounting tray 15 of the grounding strap 13 is electrically connected thereto.

When inserting the complete module 10, the grounding is made to the mounting tray 15 via the grounding strap 13. In the illustrated embodiment, up to four overvoltage protection devices, ie complete modules 10, which each contact ten individual wires, can be plugged into the disconnecting strip 11. Of course, others are Versions of the disconnect strip for one or two overvoltage protection devices within the meaning of the invention. As shown in the graphic representation Fig. 4 it can be seen, no additional space is required on the sash for a grounding strap, as is the case with the above-mentioned prior art. Two grounding points are provided for each surge protection device, providing sufficient current carrying capacity in conjunction with the contact plate. The contacting itself occurs when pushing the separator strip on the mounting tray, so that no additional effort.

LIST OF REFERENCE NUMBERS

1

contact sheet

2

circuit board

3

gas arrester

4

rear tongue

5

fixing body

6

front tongue

7

Recess in the contact plate

8th

Contact pins of the printed circuit board

9

insulating extension on the fixing body 5

10

complete module

11

Disconnection Module

12

flap

13

grounding strap

14

Semiconductor overvoltage protection device

15

mounting tray

Claims (9)

1. Overvoltage protection module,
   characterized in that
   semiconductor overvoltage protection components (14) as well as gas arresters (3) are electrically interconnected in an energetically coordinated manner on a circuit board (2) forming a wiring carrier,
   the gas arresters (3) are received by a fixing body (5), wherein the fixing body (5) has cut-outs corresponding to the outer dimensions of the respective gas arrester (3) and comprises holes on its bottom side each receiving a connecting contact of the respective gas arrester, wherein further the gas arrester connecting contacts passed through the holes are connected by soldering to corresponding contact surfaces on the circuit board (2),
   a common contact sheet (1) for the counter-contacts of the gas arresters (3) is provided, wherein the contact sheet (1) comprises, in correspondence with the position of the counter-contacts, recesses (7) with spring clip properties so that all counter-contacts can be connected jointly when the contact sheet (1) is mounted,
   the contact sheet (1) includes angled tongues (6), wherein at least one tongue (6) forms a ground connection and at least one other tongue (6) encompasses the fixing body on the outside, and is connected to a ground connection point on the circuit board (2) in a non-positive manner and/or by material engagement,
   one end of the circuit board (2) comprises contact pins (8) or is configured to form a plurality of pins, wherein the distance between the pins corresponds to a predefined raster size and the at least one tongue (6) for the ground connection is arranged laterally adjacent to the contact pins (8).
2. Overvoltage protection arrangement, specifically for telecommunication installations and/or systems, which comprise at least one disconnecting strip (11) with plug contacts in the raster size, and wherein the disconnecting strip (11) includes at least one grounding contact or grounding point,
   characterized in that
   an overvoltage protection module (10) according to claim 1 is provided for a plurality of twin wires of the disconnecting strip (11), wherein the overvoltage protection module comprises a wiring carrier, specifically a circuit board (2), the circuit board (2) comprises at one end contact pins (8) corresponding to the raster size of the plug contacts, and includes a group of energetically coordinated overvoltage arresters wired according to the protection circuitry,
   wherein further at least one ground connection is provided on the overvoltage protection module (10) which is positioned in the plane of the contact pins (8), the overvoltage protection module (10) is surrounded by a housing which spares at least sections of the ground connection and the contact pins (8), wherein one or more overvoltage protection modules (10) are pluggable into the disconnecting strip (11), thereby forming the electrical connection between the plug contacts and the contact pins (8), on the one hand, and between the ground connection and the grounding contact, on the other hand, wherein the grounding contact includes a grounding strap (13) which includes at least two notched or integrally formed tabs (12) engaging with slot-shaped cut-outs or grooves of the disconnecting strip base body, wherein the tabs (12) are preferably located laterally next to a group of plug contacts,
   the grounding strap (13) includes contact claws for producing the external ground connection via a mounting trough or similar means and the grounding strap (13) with the tabs (12) can also be inserted or slid into the disconnecting strip base body subsequently.
3. Overvoltage protection module according to claim 1,
   characterized in that
   the gas arresters (3) extend with their terminals substantially vertically to the plane of the circuit board, wherein the contact pins run in the plane of the circuit board.
4. Overvoltage protection module according to claim 1 or 3,
   characterized in that
   the contact sheet (1) comprises two outer, laterally opposite ground connection tongues (6) and two inner tongues (4) laterally encompassing the fixing body.
5. Overvoltage protection module according to one of claims 1, 3 or 4,
   characterized in that
   the contact sheet (1) is a metallic stamped bending part, wherein each recess (7) for the counter-contacts of the gas arresters (3) comprises several spring claws oriented towards the center point, which enter into a non-positive/positive engagement with the respective connecting wire of the respective gas arrester (3).
6. Overvoltage protection module according to one of claims 1, 3, 4 or 5,
   characterized in that
   the contact pins (8) of the circuit board (2) and the at least one tongue (6) for the ground connection are so-called father contacts.
7. Overvoltage protection module according to claim 5,
   characterized in that
   the spring claws each form a disc spring which produces a mechanical resistance opposite to the connecting wire as it is inserted.
8. Overvoltage protection module according to one of claims 1, 3, 4, 5, 6 or 7,
   characterized in that
   the fixing body (5) is made of an insulating plastic material and the cut-outs are designed as multi-row chambers, that further the fixing body (5) includes lateral prolongations (9) which encompass the circuit board (2) at a lateral distance in a guided manner, that further the side wall of the fixing body (5) includes at least one groove for receiving the at least one further tongue.
9. Overvoltage protection module according to claim 8,
   characterized in that
   the fixing body (6) is at the same time a mounting aid for the gas arresters (3).

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