WO2013083829A1

WO2013083829A1 - Overvoltage arrester

Info

Publication number: WO2013083829A1
Application number: PCT/EP2012/074921
Authority: WO
Inventors: Thomas Goeschl
Original assignee: Eaton Industries (Austria) Gmbh
Priority date: 2011-12-09
Filing date: 2012-12-10
Publication date: 2013-06-13
Also published as: EP2789062B1; AT512235A1; EP2789062A1; RU2014127894A

Abstract

The invention relates an overvoltage arrester (1), comprising a device socket (2) with an U-shaped insert part receiving element (11), wherein the device socket (2) is provided to be fastened to a mounting rail. According to the invention, at least two insert parts (3) are arranged in the insert part receiving element (11), each of the insert parts (3) comprising at least one overvoltage protection element.

Description

surge

The invention relates to a surge arrester according to the preamble of claim 1.

It is known to form surge arrester as a pluggable device combination of a lower part or housing base and a plug-in module or insert part. The housing base has connection terminals for contacting the electrical conductors and a receptacle for the insert part to be used, whereas at least one overvoltage protection element is arranged in the insert part. The electrical connection between the insert and the housing base is usually via plug contacts. In the insert part is a

Overvoltage protection element arranged. Such surge arresters are each allowed for certain maximum dissipative currents. A disadvantage of such known Uberspannungsableitern is that the technical complexity for their implementation and the corresponding costs increase disproportionately with increasing maximum dissipatable current.

The object of the invention is therefore to provide a surge arrester of the type mentioned, with which the mentioned disadvantages can be avoided, and with which easily and with little financial and technical effort safely high currents can be derived.

This is achieved by the features of claim 1 according to the invention.

As a result, an overvoltage arrester can be formed easily and with little financial and technical, in particular manufacturing, effort, which has a high current carrying capacity.

The subclaims relate to further advantageous embodiments of the invention. It is expressly referred to the wording of the claims, whereby the claims at this point are incorporated by reference into the description and are considered to be reproduced verbatim.

The invention will be further described with reference to the accompanying drawings, in which a merely preferred embodiment is shown by way of example. Showing:

1 shows a surge arrester in axonometric representation;

Fig. 2 shows a package of two inserts in axonometric representation; and

Fig. 3 shows a single insert in axonometric view.

Fig. 1 shows a surge arrester 1 comprising a device base (2) with a U-shaped insert receiving part 5, wherein the device base 2 is provided for attachment to a mounting rail, wherein in the insert part receptacle 5 at least two insert parts 3 are arranged, each of the insert parts. 3 has at least one overvoltage protection element.

As a result, a surge arrester 1 can be easily and with little financial and technical, in particular production engineering, effort, which has a high current carrying capacity.

Surge arresters 1 according to the invention serve to protect electrical installations and / or people from electrical overvoltages which propagate on an electrical line. Especially the susceptibility but also the

Importance of computers has become widespread

Surge arresters 1 out. Surge arresters 1 are generally designed as components which produce a very high-resistance or insulating connection between at least one phase or an outer conductor of an electrical network, in particular an electrical supply network, and a neutral conductor or a further phase of the network , If no overvoltage occurs, virtually no current flows through the surge arrester 1, and the function of the subsequent network is not affected by the presence of the surge arrester 1. When an overvoltage occurs, the surge arrester 1 forms a very fast within a very short time low-resistance transition between the phase and the neutral conductor or another phase, and thus bypasses the subsequent network. Of the

Überspannungsabieiter 1 has for this purpose at least one overvoltage protection element, which is preferably designed as a varistor. Due to the low resistance when an overvoltage occurs, correspondingly high currents can flow through the surge arrester 1.

Surge arrester 1 also have, in addition to a specified or specific rated voltage, a specified or stated current-carrying capacity.

Overvoltage arresters 1 according to the invention have a modular construction, and comprise a device base 2 and an insert part 3.

The device base 2 is for mounting on a mounting rail, such as a

Hutprofilschiene, provided, and has a corresponding hiezu

Mounting rail receptacle 25 and the necessary mounting means 26. For connection to the electrical network to be protected, the device base 2 has at least one first and one second connection terminal 27. FIG. 1 shows a surge arrester 1 for protecting a single-phase electrical network. The respective surge arrester 1 has in each case two terminals 27 on the input side as well as on the output side. It can be provided to connect the two terminals 27 on one side in parallel, such as a distribution rail. But it can also be provided that the two

Terminals 27 one side are short-circuited in the device base 2, so that only one of the terminals 27 one side must be connected.

The device base 2 preferably has a multi-part device base housing 28, which is formed from an insulating material.

The device base 2 has a substantially U-shaped insert part receptacle 5 for the insert part 3, whereby a differently configured insert part receptacle 5 can be provided, for example in the form of a recess closed on the circumference. The insert receiving part 5 has a according to the preferred embodiment first and a second side part 13, 14, as well as a base part 20 connecting these, and is formed substantially opposite to a lower part 30 of the insert part 3, which is intended to be inserted into the insert part receptacle 5. In the insert part receptacle 5, preferably in the region of the base part 20 are - also not shown - arranged inner contacts for contacting the insert part 3. To insert the insert 3 in the

To simplify insertion part receptacle 5, an insertion region is preferably arranged on the first and / or second side part 13, 14.

The insert part 3 has according to the illustrated preferred embodiment, an insert part housing 4 made of an insulating material, which is preferably formed of several parts. The insert part housing 4 encloses the insert part 3 substantially completely and on all sides, wherein only the areas for the

Contact with the device base 2 and for display means

are formed part-free housing. The insert 3 is designed as a fully functional electrotechnical component, and can be checked or removed as such electrotechnically. The insert part 3 further comprises electrical contact pins 32, which protrude from the insert part housing 4, for

Contacting the inner contacts of the device base 2.

It is envisaged that in the insert part receptacle 5 at least two insert parts 3 are arranged, wherein each of the insert parts 3 at least one

Overvoltage protection element has.

Subsequently, an arrangement of a device base 2 and two inserts 3 is essentially treated, as shown in Fig. 1. It is also possible to provide surge arresters 1 with more than two insert parts 3, in particular with three or four insert parts 3.

The two inserts 3 are each as a complete and functional

Inserted parts 3 are formed, and in particular each have an insert part housing 4, which in each case also has a side wall, on which the two

Insert 3 abut each other. As a result, the two insert parts 3 are each independent electrical devices which can be removed as such or tested by a testing agency. By connecting the at least two insert parts 3 in parallel, it can be achieved that the surge arrester 1 has a significantly higher current carrying capacity than a conventional surge arrester 1 with only one insert part 3. In this connection, it is preferably provided that the overvoltage protection elements in the individual insert parts 3 respectively have a higher current carrying capacity than the current carrying capacity of the entire

Surge arrester 1 divided by the number of inserts 3. The respective current carrying capacity is listed on the surge arrester. By the circuitry parallel arrangement of the overvoltage protection elements whose respective current load is reduced. Due to component tolerances, even with identical specified component parameters, it will generally not be possible to achieve a completely uniform distribution of the currents across the individual components

Overvoltage protection elements come. By increasing the respective current carrying capacity, this can be compensated advantageous.

In this context, it is preferably provided that the

Overvoltage protection elements in the individual inserts used in terms of their parameters, in particular with regard to the turn-on voltage and the actual internal resistance, are paired. It is preferably provided, those overvoltage protection elements from a crowd

To select surge arresters and pair, which have predetermined small deviations of said parameters.

Preferably, as also shown, it is provided that the at least two

Insert parts 3 are arranged side by side in parallel in the insert receiving part 5. As a result, the space utilization within a distribution cabinet can be positively exploited. This also has an advantageous effect on the wiring of the two insert parts 3.

It can be provided that the two insert parts 3 are arranged in the insert part receptacle 5 as in each case physically separate insert parts 3. Therefore, the two insert parts 3 are not connected to each other. This is a particularly simple structure, with the use of standard components is particularly supported. It may be provided in this, as well as in the further context preferably that on a front side 35 of the at least two insert parts. 3 a common cap 36 is arranged. As a result, the two insert parts can be held together and it is a uniform or

supports holistic appearance.

It is preferably provided that the at least two insert parts 3 connected to each other, in particular riveted, are. It is provided in particular that the two insert parts 3 are connected after their separate completion. This can ensure that the respective insert parts 3 are not used in other surge arresters 1.

Each of the insert parts 3 preferably has in each case a function display 37, which indicates the functional readiness of the overvoltage protection element, and is coupled to it for this purpose. It is particularly preferred that the function displays 37 of the two separate insert parts 3 are coupled. This can be achieved that only a display a user on the

Operational readiness of the surge arrester informed. The function displays 37 are coupled in such a way that the failure of one of

Overvoltage protection elements indicates a total failure of the surge arrester 1, and replacement of the inserts 3 is required. This can improve the safety in electrical systems.

If a cap 36 is provided, it is preferably provided that the cap 36 has a viewing window 38, to view a function display 37. It is provided that the one function display 37 is visible, indicating the state of both overvoltage protection element.

Claims

PATENT APPLICATIONS

1. surge arrester (1) comprising a device base (2) with a U-shaped insert receiving part (5), wherein the device base (2) is provided for attachment to a mounting rail, characterized in that in

Insert part receptacle (5) at least two insert parts (3) are arranged, wherein each of the insert parts (3) has at least one overvoltage protection element.

2. surge arrester (1) according to claim 1, characterized in that the at least two insert parts (3) are connected in parallel.

3. surge arrester (1) according to claim 1 or 2, characterized

in that the at least two insert parts (3) are arranged parallel to one another in the insert part receptacle (5).

4. surge arrester (1) according to one of claims 1 to 3, characterized in that on a front side (35) of the at least two insert parts (3) has a common cover (36) is arranged.

5. surge arrester (1) according to one of claims 1 to 4, characterized in that the overvoltage protection elements in the individual

Insert parts (3) each have a higher current carrying capacity than the

Current carrying capacity of the entire surge arrester (1) divided by the number of inserts (3).

6. surge arrester (1) according to one of claims 1 to 5, characterized in that the insert parts (3) each have a function display (37), and that the function displays (37) are coupled.

7. surge arrester (1) according to one of claims 4 to 6, characterized in that the cap (36) has a viewing window (38), for viewing a function display (37).

8. surge arrester (1) according to one of claims 1 to 7, characterized characterized in that the overvoltage protection element is designed as a varistor.

9. surge arrester (1) according to one of claims 1 to 8, characterized in that the at least two insert parts (3) connected to each other, in particular riveted, are.