DE102006028959A1 - Plug-in surge arrester with one or more 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

The The invention relates to a pluggable surge arrester with a or more overvoltage protection elements and a base part for mechanical or electrical recording at least one such pluggable surge arrester according to the preamble of claim 1 or 6.

From the German utility model DE 20 2004 006 227 is a surge arrester with telecommunications contact for error signaling previously known. The triggering of the potential-free mechanism takes place in this prior art by means of thermal monitoring varistors used or the trigger unit used network spark gaps in the corresponding plug-in parts, which is forwarded via biased springs by means of slide or flexible board.

in the Base part of this prior art surge protection device is the mechanical movement by means of moving plunger and a rotatably mounted Transfer rocker switch to a micro-switch, which at its outputs one potential-free changeover contact provides.

From the DE 100 01 667 C1 a multi-pole surge arrester for use in low-voltage power supply systems is previously known, comprising a single substantially U-shaped base with terminals in the body for the active lines and PE or ground potential, wherein in the cover of the base guide means for releasably receiving electrically to the terminals contactable plug-in parts are provided with Varistor- or spark gap elements.

at the previously known multi-pole surge arresters these are as set out in a substantially U-shaped base part used, for what the surge arresters Have plug contacts.

It However, it has been shown that at high demands on the surge current carrying capacity the plug contacts tend to merge. Will the contact forces of facing each other Contact elements over reinforced the design of the clamping seat, then for the purpose of Replacement of the respective surge arrester Hardly be removed without mechanical aids, what service represents a not insignificant disadvantage.

Out The above, it is therefore an object of the invention, an advanced pluggable surge arrester and a base part for mechanical or electrical recording to deliver such arrester, the design is particularly compact is and the necessary plug contacts between surge arrester and the Mating contacts in the base over an excellent surge current carrying capacity up to 100 kA. The object of the invention is also this high surge current carrying capacity to ensure the plug contacts without that at Inserting or removing the surge arrester too high mechanical forces and / or mechanical aids occur or are to be used.

The solution The object of the invention is achieved by the feature combination according to the teaching according to claim 1 or 6, wherein the dependent claims at least expedient embodiments and represent further education.

In accordance with the invention accordingly, the pluggable surge arrester two chambers, wherein a first, lower chamber an encapsulated spark gap or a similar erase arrangement receives.

The End faces of the lower chamber are formed by plug contact surfaces or are limited by such plug contact areas, which respectively are in electrical connection to the spark gap. It is preferred Here is a screw between the plug contact surfaces and selected the respective spark gaps.

The second, upper chamber takes a known overcurrent protection device and / or other electronic assemblies.

Between lower and upper chamber, a partition wall is provided which a wiring carrier to be able to fix. This wiring carrier can have a trigger circuit in an application.

The Plug contact surfaces, which are made of a metallic stamping material, have a stabilizing crank on, which is preferably designed as Außenkröpfung. The cranes or the plug contact surfaces even go in at least two spaced straight, largely smooth-surfaced connection lugs over, whose Lower edges each have a sliding or insertion bevel in the sense of a chamfer. The connection flags the respective end faces are parallel to each other.

The terminal lugs at the respective end face are aligned in a line.

The lower chamber is from one to the outer contour of the spark gap matched Lockable bottom part.

at an embodiment the spark gap is designed as a hollow cylindrical body, and accordingly the bottom part in cross section has a circular or circular segment shape.

In Another embodiment of the invention, at least one of the plug contact surfaces on the the connection flags opposite End of a molded extension, which in electrical connection to the wiring carrier stands. In this way, without any additional effort part of the Wiring between spark gap and e.g. Trigger electronics implemented become.

The inventive base part for mechanical or electrical recording of at least one, preferably several pluggable surge arresters has a substantially U-shape and has a switching device for potential-free remote signaling of fault conditions as well as contact counterparts and known per se terminals.

from The bottom part of this base part extend substantially vertically projections upwards, which the respective terminals provided in there Leading recess take up.

The terminals each have a contact counterpart, which is a U- or V-shape has an opening directed away from the bottom part.

Between the legs of the respective contact counterparts a molded spring part is inserted, which a Führungsabwinklung comprises when plugging in the surge arrester with its respective terminal lug corresponds.

Farther are provided in the bottom part of the base part formations or recesses, which have a U- or V-shape which corresponds to that of the contact counterparts, to fix these laterally.

One first leg of the contact counterpart goes into the respective terminal or is connected to this. A second leg of the counterpart contact stands with its inside in large area or full surface Contact with the respective likewise flat terminal lug of the used surge arrester.

The contact counterparts can in the area of their U- or V-shape analogous to the spaced terminal lugs 9 also spaced, ie formed upstream dividing.

in the Base part is for Modular combination arresters provide a multiplicity of terminals with contact counterparts, around several surge arresters parallel to each other.

For TT systems is an internal N / PE bridge provided in the space between two surge arrester slots as Metal molding located and non-positively with the respective contact counterpart, preferably connected by riveting.

The respective second leg of a pair of contact counterpart can via their Width an oblique have extending portion.

The aslant extending portions of the second leg of the respective pair can formed in a further embodiment to each other running be.

The Shape of the oblique extending portions is to the shape of the bottom of the U-shape base part in the area of the terminals chosen for the purpose of centering this complementary. Furthermore, the effect aslant extending sections easier insertion of the surge arrester in that with the contact counterparts provided base part.

The Invention will be described below with reference to an embodiment and below With the help of figures closer explained become.

in this connection demonstrate:

1 a perspective view of a pluggable surge arrester with indicated overcurrent protection device, spark gap and the structural unit of two chambers;

2 a representation of the bottom part of the base part with terminals and internal N / PE bridge;

3 a representation of the surge arrester with the side walls of the upper chamber and a representation of the extension for current conduction from the spark gap to electronic elements on the wiring substrate;

4 a detailed representation of the contact counterpart in U-shape with already inserted surge, the terminal lug has reached its final position in the U-shaped portion of the contact counterpart;

5 a perspective view of the U-shaped base member which is capable of receiving a plurality of surge arresters;

6 a representation of the underside of the U-shaped base part, wherein the recognizable part here on the bottom part according to 2 is attached or attached, and

7 a representation of a complete device as a combination arrester for example TT systems.

The pluggable surge arrester according to the illustrations after 1 and 3 has a first lower chamber 1 on which an example encapsulated spark gap 2 receives.

The end faces of the lower chamber 1 are from plug contact surfaces 3 formed or of such metallic plug contact surfaces 3 limited.

The plug contact surfaces 3 are via a screw connection with the corresponding electrode of the spark gap 2 electrically and mechanically related.

The second, upper chamber 4 can be an overcurrent protection device 5 , Have a defect display, not shown, or other electronic components.

Between the lower and the upper chamber is a partition 6 for example, of a plastic material, which is a wiring carrier 7 receives. The wiring carrier 7 is preferably designed as a printed circuit board and can the mentioned overcurrent protection device 5 wear mechanically and ensure their electrical wiring.

The plug contact surfaces 3 have a stabilizing bend 8th on, which is directed in the example shown to the outside.

Continue to go the plug contact surfaces 3 in at least two spaced terminal lugs 9 over, whose lower edges each have a sliding or insertion oblique 10 have. Furthermore, the connecting lugs run 9 the respective end faces parallel to each other.

The terminal lugs the respective end faces are aligned on or in a line, i.e. these run on a straight line.

The lower chamber 1 is from one to the outer contour of the spark gap 2 adapted bottom part 11 , preferably made of plastic material, closable.

At the bottom part 11 can be extensions 11.1 be formed, which form a stop when inserting the pluggable surge arrester in the base part.

The upper chamber 4 has two of the partition 6 side walls extending parallel upwardly 12 on. As a result, the pluggable surge arrester can be completely closed with a simple cap, as shown in the illustration 7 is apparent.

At which the connecting lugs 9 opposite end of at least one of the plug contact surfaces is an integrally formed extension 13 formed, which in electrical connection to the wiring support 7 stands. In this way, necessary potential for a trigger circuit and / or the overcurrent protection device can be introduced.

The base part for the mechanical or electrical recording of at least one, preferably a plurality of pluggable surge arrester is based on the 2 . 4 . 5 and 6 be explained in more detail.

From the bottom part 14 of the base extend spaced extensions 15 almost vertically upwards, which the respective terminals 16 lead and record secured against displacement.

The terminals 16 each have a contact counterpart 17 on, which has a U-shape, with one of the bottom part 14 away, free opening directed upwards.

Between the thighs 18 the respective contact counterparts 17 is a shaped spring part 19 used, which is a Führungsabwinklung 20 includes. The shaped spring part is preferably made of an element manufactured by punching and bending, which by its given shape captive between the legs 18 of the contact counterpart 17 is held.

The guide bend 20 points with its open end towards the respective terminal, so that for insertion and insertion of the surge arrester with its terminal lugs 9 gives a free space.

In addition, in the bottom part 14 Moldings provided, which have a shape that corresponds to that of the contact counterparts to these in addition to the extensions 15 to fix.

A first thigh 18.1 of the contact counterpart 17 goes into the respective terminal 16 over or is connected to this, with a second leg 18.2 with its inside in large contact with the respective terminal lug 9 the surge arrester used stands.

The contact counterparts 17 are in the range of their U-shape analogous to the spaced terminal lugs 9 formed upstream dividing (see 2 ).

In the base part as shown in FIG 2 two opposite rows of terminals or connecting elements may be provided with contact counterparts to accommodate a plurality of surge arresters in parallel side by side.

For TT systems is an internal N / PE bridge 200 provided, which is located in the space between two surge arrester slots as a metal molding and with the respective contact counterpart 17 non-positively connected, preferably by riveting.

The respective second legs 18.2 of a pair of contact counterpart can have a slanting portion across their width 21 (please refer 2 ) exhibit. These sloping sections can, as in the 2 shown to run towards each other. Due to the oblique design based on the width of the respective leg 18.2 occurs when inserting a surge arrester not the entire terminal lug 9 across its entire width in frictional contact to be overcome, but only a smaller width range.

The shape of the sloping sections 21 can to shape 24 the bottom 23 of the U-shape base 22 be selected in the region of the terminals for the purpose of centering this complementary. This training of the figure 24 show the 6 , The local inclined surfaces have a shape analogous to the inclined sections 21 the second leg 18.2 on, with the result of the mentioned centering when placing the part 22 on the completed with the terminals and the bridge bottom part 11 ,

When displaying the complete device according to 7 are a total of four surge, forming a combination arrester, taken from a base part, which has a convenient internal wiring using the aforementioned bridge. Riffled grip surfaces 25 allow easy grasping and pulling of the respective arrester without the need for auxiliary tools.

1

first chamber

2

radio link

3

Plug contact surface

4

second chamber

5

Overcurrent protection device

6

partition wall

7

wiring support

8th

cranking

9

terminal lug

10

chamfer

11

the bottom part

11.1

extension

12

Side wall

13

extension

14

the bottom part

15

extension

16

terminal

17

Contact counterpart

18

leg

18.1

first leg

18.2

second leg

19

Shaped spring part

20

Führungsabwinklung

200

N / PE bridge

21

sloping section

22

U-shaped base part

23

bottom

24

shape

25

grip

Claims (13)

Pluggable surge arrester with one or more overvoltage protection elements, which are arranged in a structural unit with an optical defect indicator, and with a thermal overcurrent protection device, this comprising an actuator for triggering a telecommunications contact for error signaling, characterized in that the structural unit has two chambers, wherein a first, lower chamber ( 1 ) an encapsulated spark gap or similar arrangement ( 2 ) and the end faces of the lower chamber of plug contact surfaces ( 3 ) are formed or limited, which in each case in electrical connection to the spark gap ( 2 ), a second, upper chamber ( 4 ) the overcurrent protective device ( 5 ), between lower and upper chamber ( 1 ; 4 ) a partition wall ( 6 ), which is a wiring carrier ( 7 ), the plug contact surfaces ( 3 ) a stabilizing crank ( 8th ) and in at least two terminal lugs ( 9 ), whose lower edges each have a sliding or insertion bevel ( 10 ) and continue to run the terminal lugs of the respective end faces parallel to each other. Surge arrester according to Claim 1, characterized in that the terminal lugs ( 9 ) are flush with each other at the respective end face. Surge arrester according to Claim 1 or 2, characterized in that the lower chamber ( 1 ) from one to the outer contour of the spark gap ( 2 ) adapted bottom part ( 11 ) is closable. Surge arrester after one of the preceding gone claims, characterized in that the upper chamber ( 4 ) two of the partition ( 6 ) side walls extending parallel upwards ( 12 ) having. Surge arrester according to one of the preceding claims, characterized in that the terminal lugs ( 9 ) opposite end at least one plug contact surface ( 3 ) has a molded extension which in electrical connection to the wiring substrate ( 7 ) stands. Base part for the mechanical or electrical reception of at least one, preferably a plurality of pluggable surge arresters according to one of the preceding claims, in U-shape with a switching device for the potential remote signaling of fault conditions, contact counterparts and terminals, characterized in that from a bottom part ( 14 ) spaced extensions ( 15 ), which connect the respective terminals ( 16 ), the terminals ( 16 ) each a contact counterpart ( 17 ) having a U- or V-shape with one of the bottom part ( 14 ) directed away, between the thighs ( 18 ) of the respective contact counterparts ( 17 ) a shaped spring part ( 19 ), which is a Führungsabwinklung ( 20 ), which upon insertion of the surge arrester with its respective terminal lug ( 9 ) corresponds. Base part according to claim 6, characterized in that in the bottom part ( 14 ) Moldings are provided, which have a U- or V-shape, which that of the contact counterparts ( 17 ) corresponds to fix them. Base part according to claim 6 or 7, characterized in that a first leg ( 18.1 ) of the contact counterpart merges into or is connected to the respective terminal, wherein a second leg ( 18.2 ) with its inside in large-area contact with the respective terminal lug ( 9 ) of the surge arrester used. Base part according to one of claims 6 to 8, characterized in that the contact counterparts ( 17 ) in the region of its U- or V-shape analogous to the spaced terminal lug ( 9 ) are formed upstream dividing. Base part according to one of claims 6 to 9, characterized in that it has a plurality of terminals ( 16 ) with contact counterparts ( 17 . 18.1 . 18.2 ) in order to accommodate a plurality of surge arresters in parallel next to one another, wherein for TT systems an internal N / PE bridge ( 200 ), which is located in the space between two surge arrester slots as a metal molding and with the respective contact counterpart ( 17 ) non-positively, preferably by riveting, is connected. Base part according to claim 9, characterized in that the respective second limbs ( 18.2 ) of a pair of contact counterpart ( 17 ) across its width a sloping section ( 21 ) exhibit. Base part according to claim 11, characterized in that the oblique sections ( 21 ) of the second leg of the respective pair to run towards each other. Base part according to claim 11 or 12, characterized in that the shape of the oblique sections ( 21 ) to the shape ( 24 ) of the underside ( 23 ) of the U-shape base part ( 22 ) is selected in the region of the terminals for the purpose of centering this complementary.