WO2013083830A1

WO2013083830A1 - Overvoltage arrester

Info

Publication number: WO2013083830A1
Application number: PCT/EP2012/074922
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: RU2014127895A; EP2789063A1; EP2789063B1; AT512255A1

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 (5), each of the insert parts (3) comprising at least one overvoltage protection element (48) and in each case a function display (37), the function displays (37) being coupled to each other.

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. As a result, can further be reliably detected a failure of the reliability of the surge arrester.

The subclaims relate to further advantageous embodiments of the invention. It is hereby 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 with the function displays in a first position in axonometric representation;

FIG. 2 shows a package of two insert parts of a surge arrester according to FIG. 1 in axonometric representation; FIG.

Fig. 3 is a single insert in axonometric view;

FIG. 4 shows the surge arrester according to FIG. 1 with the function displays in a second position in axonometric representation; FIG.

FIG. 5 shows the insert part according to FIG. 3 with the housing part lifted off; FIG.

Fig. 6 shows a preferred embodiment of a first trigger lever; and

Fig. 7 shows a preferred embodiment of a second trigger lever.

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 at least one Overvoltage protection element 48, and wherein the

Insert parts 3 each have a function display 37, and that the

Function indicators 37 coupled sin.

As a result, an overvoltage arrester 1 can be formed easily and with little financial and technical, in particular manufacturing, effort, which has a high current carrying capacity. As a result, further reliably a failure of the operational safety of the surge arrester 1 can be detected. Overvoltage 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

Surge arrester 1 has for this purpose at least one overvoltage protection element 48, which is preferably designed as a varistor. By the small one

Resistance when an overvoltage occurs, it can come to flow correspondingly high currents through the surge arrester 1.

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

Surge 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 the protection of a single-phase electric network. The respective surge arrester 1 has in each case on the input side and on the output side two connection terminals 27. It can be provided 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, according to the preferred embodiment, a first and a second side part 13, 14, as well as a connecting them

Base part 20, 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 48 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 a parallel connection of the at least two insert parts 3 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 context, it is preferably provided that the overvoltage protection elements 48 in the individual insert parts 3 each have a higher current carrying capacity, as 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 48 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 48 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 48 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 to select those overvoltage protection elements 48 from a set of overvoltage protection elements 48 and to pair, which can be predetermined have 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.

It is provided that each of the insert parts 3 each have a function display 37 which indicates the functional readiness of the overvoltage protection element 48, and is coupled to it. It is further provided that the function displays 37 of the two separate insert parts 3 are coupled. This can be achieved that only an ad a user on the

Operational readiness of the surge arrester 1 informed. The

Function displays 37 are coupled such that the failure of one of the overvoltage protection elements 48 a total failure of

Overvoltage arrester 1 indicates which requires an exchange of both inserts 3. 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 function display 37 is visible, which indicates the state of both overvoltage protection elements 48.

According to the present invention shown as preferred in the figures

Embodiment is provided that the function display 37 per insert part 3 comprises a display lever 3, whereby a structurally simple function display 37 can be formed. In particular, the coupling of the two function displays 37 can thereby be implemented. The indicator lever 39 are preferably rotatably mounted within the insert part housing 4, and have a

at right angles to the pivot direction protruding display area 47.

For the purposes of further description, one of the insert parts 3 is referred to as a first insert part 3, 45, which has a first indicator lever 39, 43, and the other of the insert parts 3 is referred to as a second insert part 3, 46, which has a second indicator lever 39, 44 , This preferably represents no restriction to only two insert parts 3, 45, 46.

For this purpose, it is preferably provided that a display lever 39 of the at least two indicator lever 39 has an extension 42, to entrain the other

Indicator lever 39 of the at least two indicator levers 39.

According to the illustrated preferred embodiment, it is provided that the first indicator lever 39, 43 has said extension 42. This extends beyond the insert part housing 4 of the first insert part 3, 45, for engagement with the second indicator lever 39, 44 of the second insert part 3, 46. The extension 42 is formed, the second indicator lever 39, 44 in the case of movement of the first indicator lever 39, 43 mitzubewegen in the manner of a Schleppzeiger.

In the case of the operational readiness of the overvoltage protection elements 48, both indicator levers 39, 43, 44 are in the position which the first indicator lever 39, 43 in FIGS. 1, 3 and 5 has. It is preferably provided that the respective indicator lever 39, 43, 44 is held in the insert part 3 by a solder joint 40 in this function readiness position. The solder joint 40 connects prefers the indicator lever 39, 43, 44 with a, through the

Overvoltage protection element 48 thermally stressed point. This solder joint 40 is caused by thermal stress in the case of overvoltage deriving

increasingly weakened, all the way to their complete solution.

The indicator levers 39, 43, 44 are preferably each by a spring 41st

applied. The spring 41 in each case exerts a force on the indicator levers 39, 43, 44, which tries to force them towards a position which is intended to indicate that no functional readiness of the surge arrester 1 is present.

The relevant spring 41 may be formed as a separate component. According to a preferred embodiment, however, it is provided that the spring 41 is formed in each case as an integral part of the indicator lever 39, 43, 44.

It is preferably provided, the display lever 39, 43, 44 as a plastic part

train. It has been shown that with a one-piece production of the indicator lever 39, 43, 44 with the spring 41, this has grown to the prevailing thermal conditions. The spring 41 is preferably formed as a curved extension.

If a solution of a solder joint 40 of a display lever 39, 43, 44, this is pivoted by the spring force of the spring 41. Fig. 1 shows an arrangement in which the second indicator lever 39, 44 is pivoted accordingly. According to the preferred embodiment of the cap 36, as shown in Fig. 2, the viewing window 38 is in the region of the second indicator lever 39, 44. By the movement of the second indicator lever 39, 44 due to the solution of the solder joint 40, there is a change the display in the viewing window 38, which indicates to the user a no longer given operational readiness.

Fig. 4 shows the state of the same arrangement, wherein the first indicator lever 39, 43 has changed its position. This is so behind the - not shown in Fig. 4 - cap 36 according to FIG. 2 arranged that this displacement takes place undetected by a user. By the extension 42, however, the first indicator lever 39, 43 transmits its pivoting movement to the second indicator lever 39, 44, which as described above a display change caused in the viewing window 38.

According to the preferred embodiment, the function display 37 comprises a rotatably mounted indicator lever 39, 43, 44 and a solder joint. In the figures, all parts are also designated by the reference numeral of the function display 37.

The described coupling of the function display 37, a particularly high level of security for the user can be achieved because it is not unsettled by two usually different displays, and also already the failure of one of the two inserts exchange of both inserts 3, 45, 46 required power.

Claims

PATENT APPLICATIONS

1 . Surge arrester (1) comprising a device base (2) with a U-shaped insertion part receptacle (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 (48), and that the insert parts (3) each have a function display (37).

and that the function displays (37) are coupled.

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 (48) 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 4 or 5, characterized in that the cap (36) has a viewing window (38), for viewing a function display (37).

7. surge arrester (1) according to one of claims 1 to 6, characterized characterized in that the overvoltage protection element (48) is designed as a varistor.

8. surge arrester (1) according to one of claims 1 to 7, characterized in that the at least two insert parts (3) connected to each other, in particular riveted, are.

9. surge arrester (1) according to one of claims 1 to 8, characterized in that the function display (37) per insert part (3) a

Indicator lever (39) comprises.

10. surge arrester (1) according to claim 9, characterized in that a display lever (39) of the at least two display lever (39) has an extension (42) for entrainment of the other display lever (39) of the at least two indicator lever (39).

1 1. Surge arrester (1) according to claim 9 or 10, characterized

in that the respective indicator lever (39) is held in the insert part (3) by a soldering point (40) in a functional readiness position.

12. surge arrester (1) according to any one of claims 9 to 1 1, characterized in that the solder joint (40) connects the indicator lever (39) with a, by the overvoltage protection element (48) thermally stressed point.

13. surge arrester (1) according to any one of claims 9 to 12, characterized in that the display lever (39) in each case by a spring (41) are acted upon.

14. surge arrester (1) according to claim 13, characterized in that the spring (41) is formed in each case as an integral part of the indicator lever (39).