ES2314976T3 - PLUGGED OVERVOLTAGE DOWNLOADER WITH ONE OR VARIOUS OVERVOLTAGE PROTECTION ELEMENTS. - Google Patents

Abstract

The invention relates to a pluggable surge arrester comprising one or several overvoltage protection elements which are disposed within a structural unit comprising an optical fault indicator. The inventive surge arrester further comprises a thermal overcurrent protector (5) that encompasses an actuator for triggering a remote signalisation contact in order to indicate a fault. The structural unit comprises two chambers. The first lower chamber (1) accommodates an encapsulated spark gap or similar arrangement and the front sides of the lower chamber (1) are formed or delimited by plug-in contact surfaces (3) which are, respectively, electrically connected to the spark gap (2). A second upper chamber (4) accommodates the overcurrent protector. A partition (6) that fixes a wiring support (7) is provided between the lower and upper chambers. The plug-in contact surfaces (3) comprise a stabilisation bend (8) and extend into at least two connection lugs (9), the lower edges thereof respectively comprising a sliding or insertion ramp (10), the connection lugs (9) of the respective front sides being parallel in relation to each other.

Description

Plug-in surge arrester with one or Various elements of surge protection.

The invention relates to a downloader of plug-in overvoltage with one or more protection elements of overvoltage as well as a base piece for mechanical admission or electrical of at least one plug-in surge arrester this type according to the preamble of claim 1 or 6.

From the German utility model DE 20 2004 006 227 a surge arrester with contact for the remote signaling of faults. The mechanics shot without potential is effected in this state of the art by control thermal of the voltage transient suppressors used or of the firing unit of the network spark meters used in the corresponding pluggable parts, which is transmitted by means of  pre-tensioned springs by sliding or flexible stage.

In the base piece of this device previously known surge protection, movement mechanic is transmitted by a motion pusher and a rocker switch housed rotatably on a microswitch that in its outputs facilitates a contact of switching without potential.

A downloader is known from DE 10001667 C1 of multipolar overvoltage for use in systems of Low voltage power supply, comprising a single essentially U-shaped base piece with connection terminals in the basic body for active and potential PE conductors or of ground, whereby on the cover of the basic element are provided guide elements for the removable housing of parts of insertion contactable electrically with the connection terminals with voltage transient suppressor elements or spark gauges

In surge arresters known multipolar, these are incorporated, as had exposed, in an essentially U-shaped base piece, for what which surge arresters have contacts pluggable

It has been shown however that, in case of high load capacity requirements of the current Overload, plug-in contacts tend to melt. Whether intensify the contact forces of the contact elements front over the shape of the tightening seat, then you can remove, in order to change it, the respective downloader of overvoltage barely without mechanical auxiliary means, which It represents a considerable disadvantage for the service.

For the aforementioned is the task of invention present a plug-in surge arrester perfected as well as a base piece for mechanical admission or electric arresters of this type, where the form of construction is especially compact and plug-in contacts required between surge arresters and Countercontacts in the base part have a load capacity of  Excellent overload current of up to 100 kA. It is equally a task of the invention to guarantee this high load capacity of overload current of the plug-in contacts without produce or have to apply too high mechanical forces when inserting or pulling surge arresters.

The solution of the task of the invention is effect by the combination of the characteristics according to the theory of claim 1 or 6, wherein the secondary claims they represent at least configurations and refinements timely.

According to the invention, the unloader of Pluggable overvoltage therefore comprises two chambers, where a first lower chamber houses an encapsulated sparkmeter or a similar shutdown device.

The front parts of the lower chamber are formed by pluggable contact surfaces or are limited by said pluggable contact surfaces that are coupled each electrically to the sparkmeter. Preferably chosen in this case a thread contact between the contact surfaces Pluggable and the respective spark meters.

The second upper camera supports a device overcurrent protection known per se and / or others Electronic components.

Between the lower and upper chamber is provided a separation wall that is suitable for fixing a support wiring In one application, this wiring bracket can Present a trigger circuit.

The plug-in contact surfaces that are made of a stamped metallic material have an elbow stabilizer that is preferably performed as an angled Exterior. Layered or plug-in contact surfaces they are transformed into at least two connection terminals of straight surface, essentially smooth surface, whose edges lower respectively have a sliding bezel or introduction in the sense of an obliqueness. The terminals of connection of the respective front parts extend in parallel with each other.

The connection terminals are located aligned in a line in the respective front part.

The lower chamber can be closed on one side background adapted to the outer contour of the sparkmeter.

In one embodiment, the sparkmeter is configured as a hollow cylindrical body, where the bottom part therefore it has a circle shape in cross section or circular segment shape.

In another configuration of the invention, at least one of the pluggable contact surfaces at the end opposite to the connection terminals has an extension adapted to them that is electrically communicated with the wiring support. This way it can be done without cost Supplementary part of the wiring between the sparkmeter and p. ex. Shooting electronics

The base piece according to the invention for the mechanical or electrical admission of at least one arrester plug-in overvoltage, preferably several arresters overvoltage, it has an essentially U shape and has a control device for remote signaling without potential of fault states as well as counter contacts and connection terminals known itself.

From the bottom of this basic element essentially vertical extensions extend towards above, which support the respective connection terminals of so that they are guided in a planned recess.

The connection terminals present respectively a countercontact, which has a U or V shape with a hole diverted from the bottom.

Between the arms of the respective Countercontacts a profiled spring part is incorporated, the which comprises a guide with angular inclination corresponding to its respective connection terminal when inserting the arrester overvoltage

In addition, in the bottom part of the base part U or V shapes or flanges are provided that correspond to those of the contracontacts to fix them laterally.

A first arm of the contracontact is transformed in the respective connection terminal or is connected to it. A second arm of the countercontact is in contact with its inner side on a large surface or full surface with the respective equally flat connection terminal of the arrester of overvoltage used.

Countercontacts can also be formed in the area of its U or V shape analogously to the terminals of connection 9 spaced apart, that is, they can be formed of so that they subdivide the current.

In the base piece it can be provided, for modular combined unloaders, a large number of terminals connection with countercontacts to support multiple downloaders of parallel overvoltage side by side.

For TT systems a bridge is planned interior N / PE that is in the space between two points plug-in surge arrester as profiled part of metal and is not positively attached to the respective counter contact, preferably joined by rivets.

The respective second arm of a pair of Countercontacts can present a section that extends into oblique throughout its width.

The oblique sections of the second arm of the respective pair in another configuration may be formed so that they extend the one in the direction of the other.

The shape of the sections that extend in oblique is chosen in addition to the side configuration bottom of the basic U-shaped element in the terminal area of connection in order to focus the latter. In addition, the sections that extend obliquely cause slight insertion of the surge arrester in the base part provided with countercontacts

The invention will be described below. in detail by means of an embodiment as well as with Help figures.

Here they show:

Fig. 1 a perspective representation of a plug-in surge arrester with a device overcurrent protection, a sparkmeter and the unit two chamber construction;

Fig. 2 a representation of the bottom part of the basic element with connection terminals and internal bridge N / PE;

Fig. 3 a representation of the arrester of surge with the side walls of the upper chamber and a representation of the extension for the conduction of the electric current, starting from the sparkmeter in the direction of electronic elements on the wiring holder;

Fig. 4 a detailed representation of the U-shaped counter contact with surge arrester already inserted whose connection terminal has reached its final position in the U-shaped section of the countercontact;

Fig. 5 a perspective view of the element basic U-shaped, which is suitable for admitting several surge arresters;

Fig. 6 a representation of the lower side of the basic U-shaped element, where the recognizable part here is superimposed or inserted on the bottom part according to Fig. 2, Y

Fig. 7 a representation of a complete apparatus in the form of a combined downloader for, for example, systems TT.

The plug-in surge arrester according to the representations of Figs. 1 and 3 present a first chamber bottom 1, which supports p. ex. an encapsulated sparkmeter 2.

The front parts of the lower chamber 1 are formed by plug-in contact surfaces 3 or are limited by such pluggable contact surfaces 3 metallic

Pluggable contact surfaces 3 are electrically and mechanically in contact by a threaded joint with the corresponding electrode of the sparkmeter 2.

The second upper chamber 4 may have a overcurrent protection device 5, an indicator of defects not represented or other electronic components.

Between the lower chamber and the upper chamber are find a separation wall 6, p. ex. of a material plastic, which supports a wiring support 7. The support of wiring 7 is preferably formed as a printed circuit and can mechanically support the protection device of overcurrent 5 mentioned and can provide its interconnection electric

Pluggable contact surfaces 3 they have a stabilizing bend 8 which in the example shown It is oriented outwards.

In addition, pluggable contact surfaces 3 are transformed into at least two connection terminals 9 distanced, whose lower edges each have a bevel of sliding or introducing 10. In addition, the terminals of connection 9 of the respective front parts extend in parallel to each other.

The connection terminals of the respective front parts rest in alignment on or in a line, it is say they extend on a straight line.

The lower chamber 1 can be closed by a bottom part 11 adapted to the outer contour of the spark meter 2 preferably made of plastic material.

On the bottom part 11 they can be formed 11.1 extensions that create a stop when inserting the surge arrester pluggable into the base piece.

The upper chamber 4 has two walls laterals 12 extending parallel upwards from the separation wall 6. In this way, the surge arrester Pluggable can be completely closed with a cover simple, as can be seen in the representation according to Fig. 7.

At the opposite end of the terminals of connection 9 of at least one of the contact surfaces plug-in has been developed an extension 13 formed on the same that is in electrical contact with the support of wiring 7. In this way a necessary potential can be implanted for a trigger circuit and / or the protection device against Overcurrent

The base piece for mechanical admission or electric of at least one, preferably several arresters of Pluggable surge will be described in detail with the help of Figs. 2, 4, 5 and 6.

From the bottom part 14 of the basic element 15 extensions are extended spaced approximately by vertical up, which guide and house the respective connection terminals 16 securely against the displacement.

The connection terminals 16 each have a contracontact 17 which presents a U-shape, that is to say with a free hole diverted from the bottom part 14 and oriented towards above.

Between the arms 18 of the respective counter contacts 17 a profiled spring piece is incorporated 19 comprising a guide with angular inclination 20. The piece of profiled spring preferably consists of a manufactured element by punching and bending, which, due to the shape it is given, is held securely between arms 18 of the counter contact 17.

The guide with angular inclination 20 points with its open end towards the respective connection terminals, so that a space for the introduction and the insertion of the surge arrester with its terminals connection 9.

In addition, in the background part 14 Profiles are provided that have a shape that corresponds to that of the contracontacts to fix them in addition to the extensions 15.

A first arm 18.1 of the countercontact 17 is transforms into the respective terminal 16 or is connected to this, whereby a second arm 18.2 with its inner side is in contact in most of the surface with the respective connection terminal 9 of the surge arrester employee.

The contracontacts 17 are formed in the zone of its U shape analogously to the connection terminals 9 spaced apart so that they subdivide the current (see Fig. 2).

In the base piece can be provided, according to the representation in Fig. 2, two opposite series of terminals of connection or connection elements with contracontacts, for support several surge arresters parallel to each other side of the other.

For TT systems a bridge is planned interior N / PE 200 that is in the space between two points plug-ins of the surge arrester in the form of a profiled piece of metal and is not positively attached to the respective counter contact 17, preferably by rivets.

The respective second arms 18.2 of a pair of contracontacts can present a section across its width 21 (see Fig. 2) which extends obliquely. These sections that extend obliquely can run, as it comes shown in Fig. 2, towards each other. Due to the oblique embodiment with respect to the width of the respective arm 18.2, when inserting a surge arrester, not the entire terminal connection 9 enters a friction contact, which must be overcome, for all its width but first a narrower area.

The shape of sections 21 that extend in oblique can be chosen in addition to the configuration 24 of the lower side 23 of the U-shaped basic element 22 in the zone of the connection terminals in order to center it. The Fig. 6 illustrates this formation of the configuration 24. The local oblique surfaces have a shape analogous to oblique sections 21 of the second arm 18.2, with the consequence of the centering mentioned when placing part 22 on the part of the bottom 11 completed with the connection terminals and the bridge.

In the representation of the complete device according to Fig. 7 are housed in total four arresters of overvoltage by a base piece, forming a arrester combined, which has a suitable internal wiring with help of the mentioned bridge. Grip surfaces 25 provided with a groove allow an easy grip and stretching of the respective downloader, without having to use tools auxiliary

Reference List

one

First camera

2

Sparkmeter

3

Pluggable contact surface

4

Second chamber

5

Protection device against overcurrent

6

Separation wall

7

Wiring brackets

8

Layered

9

Connection terminal

10

Input bezel

eleven

Background part

11.1

Extension

12

Side wall

13

Extension

14

Background part

fifteen

Extension

16

Connection terminal

17

Counter contact

18

Arm

18.1

First arm

18.2

Second arm

19

Shaped Spring Piece

twenty

Guide with angular inclination

200

N / PE bridge

twenty-one

Oblique section

22

U-shaped base piece

2. 3

Lower side

24

Setting

25

Driving surface

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Documents cited in the description

This list of documents cited by the applicant has been collected exclusively for information of the reader and is not part of the European patent document. The it has been made with the greatest diligence; the EPO without However, it assumes no responsibility for any errors or omissions

Patent documents cited in the description

DE 202004006227 [0002]

DE 10001667 C1 [0004]

Claims (13)

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1. Plug-in surge arrester with one or more surge protection elements that are arranged in a construction unit with an optical defect indicator as well as with a thermal overcurrent protection device, the latter comprising a drive device for triggering a contact for remote signaling of faults, characterized by the fact that the construction unit has two cameras, where a first lower chamber (1) houses an encapsulated sparkmeter or a similar device (2) and the front parts of the lower chamber are formed or limited by plug-in contact surfaces (3) that are respectively in electrical contact with respect to the spark meter (2), in addition a second upper chamber (4) houses the overcurrent protection device (5), between the lower and upper chamber (1) , 4) a separation wall (6) is provided that fixes a wiring support ( 7), the plug-in contact surfaces (3) have a stabilizing bend (8) and are transformed into at least two connection terminals (9), whose lower edges respectively have a sliding or insertion bezel (10) and also, the connection terminals of the respective front parts run parallel to each other. 2. Surge arrester according to claim 1, characterized in that the connection terminals (9) are arranged in mutual alignment on the respective front part. 3. Surge arrester according to claim 1 or 2, characterized in that the lower chamber (1) can be closed by a bottom part (11) adapted to the outer contour of the spark meter (2). 4. Surge arrester according to one of the preceding claims, characterized in that the upper chamber (4) has two side walls (12) extending parallel upwards from the separation wall (6). 5. Surge arrester according to one of the preceding claims, characterized in that at the opposite end of the connection terminals (9), at least one plug-in contact surface (3) has an extension formed thereon, which It is in electrical connection with the wiring support (7). 6. Base piece for the mechanical or electrical admission of at least one, preferably several plug-in surge arresters according to one of the preceding claims, in the form of a U with a control device for remote signaling without potential error states, of contracontacts as well as connection terminals, characterized by the fact that spaced extensions (15) extend from a bottom part (14), which host the respective connection terminals (16), the connection terminals (16) presenting each a countercontact (17) having a U or V shape with a hole diverted from the bottom part (14), and a profiled spring piece is incorporated between the arms (18) of the respective countercontacts (17) (19) which comprises a guide with angular inclination (20) which, during the insertion of the surge arrester, corresponds to its respective connection terminal (9). 7. A base piece according to claim 6, characterized in that in the bottom part (14) there are provided profiles that have the U or V shape corresponding to that of the contracontacts (17) to fix the latter . 8. Base piece according to claim 6 or 7, characterized in that a first arm (18.1) of the counter contact is transformed into the respective connection terminal or is connected to it and a second arm (18.2) with its inner side it is in contact in most of its surface with the respective connection terminal (9) of the surge arrester used. 9. Base piece according to one of claims 6 to 8, characterized in that the contracontacts (17) are made in the area of their U or V shape, so that they subdivide the current, analogously to the terminal connection (9) distanced. 10. A base part according to one of claims 6 to 9, characterized in that it has a large number of connection terminals (16) with counter contacts (17, 18.1, 18.2), to admit several surge arresters in parallel with each other. next to the others, so that for the TT systems an internal N / PE bridge (200) is provided that is located in the space between two plug-in points of surge arresters in the form of a profiled metal part and is connected not positively with the respective counter contact (17), preferably by rivets. 11. A base piece according to claim 9, characterized in that the respective second arms (18.2) of a pair of contracontacts (17) have a section (21) that extends obliquely over its width. 12. Base piece according to claim 11, characterized in that the oblique sections (21) of the second arms of the respective pair extend in the direction of each other. 13. Base piece according to claim 11 or 12, characterized in that the shape of the oblique sections (21) is chosen in addition to the configuration (24) of the lower side (23) of the base piece (22) ) U-shaped in the area of the connection terminals in order to center the latter.