SI25063A - A surge arrester - Google Patents

Abstract

An object of the invention is an overvoltage arrester for electrotechnical devices with an indicator of a failure with a signaling pin which is directly or indirectly resilient from the baseline position signaling the ability of the surge arrester to operate in the position of indicating a failure upon a faulty heating of the overvoltage arrester, the signaling pin being held in the base position in the position which is prestressed against the force of the spring, and thus is capable of being positioned in the position indicating the failure, that the short-circuit current flows through the surge arrester and heats it or its construction parts, it is improved so that it can be made cost-effective and easy with only a little time consuming by holding a retaining part from the low-melting lithium in the baseline position held by the surge arrester with a signaling pin, the retaining portion retaining parts of the overvoltage arrester which, in the event of a failure, is heated, and in the event of a malfunction when heating parts of the overvoltage a arrestor stopped and released a signaling pin.

Description

OVERVOLTAGE ARM

Technical area

The invention relates to an overvoltage arrester for electrical appliances, wherein the overvoltage arrester has, on its housing or in its housing, a failure indicator with a signaling pin, which can be directly or indirectly adjustable from a starting position signaling the ability of the overvoltage arrester to function faulty heating of the surge arrester, keeping the signaling pin in the starting position in a position that is biased against the force of the spring, and thus adjustable to the fault indication position so that the current flows through the surge arrester and its or its structural parts.

Such surge arresters are known in the art and are commonly used in practice.

Such surge arresters, which typically comprise a surge protector such as e.g. the spark gap and, where appropriate, at least one further electrical structural member, which is connected in series with it, are often located inside the housing, which is connected between the phase conductor and the PE conductor or N conductor.

In such overvoltage arresters, it is known to assign a signaling pin that communicates with a failure indicator indicating the ready state for operation at the starting position of the signaling pin and which, in the released and changed position, is adjustable to a fault indication position which can be disengaged by the failure indicator shows the user.

For example, surge arresters of a similar type are e.g. known from DE 36 39 533 Al and from DE 10 2009 012 931 Al.

For surge arresters known in the art, e.g. the signaling pin attached to the housing or part of the housing of the surge arrester, whereby the lot, after a short contact, sparkles and releases the signaling pin. Therefore, heat is used in the event of a failure to separate the accessory signaling pin from the surge arrester and move the failure indicator from the starting position to the fault indication position.

Attaching a signaling pin to a housing or part of a housing is time-consuming and costly.

On the basis of the aforementioned prior art, it is an object of the invention to improve the surge arrester of the aforementioned prior art so that it can be made cost-effective and simple with only a reduced amount of time.

In order to solve the problem, the invention proposes that the low-melt lot holder in the starting position held by the surge arrester holds the signaling pin, the retaining part retains the surge arrester parts which, in the event of failure, heat up and, in the event of failure, heating the parts of the surge arrester stops and releases the signaling ski pin.

According to this embodiment, the signaling pin with a low-fusible lot holding member, which is made cost-effective and simple, is held in place by the parts of the surge arrester which, in the event of failure, heat up. This, in particular, is a time-consuming and cost-disadvantageous cracking of signaling pins with parts, such as eg. parts of the housing, overvoltage arrester is no longer needed, saving time and cost.

The holding part therefore holds the signal pin in a pre-tensioned position against the spring and releases it as soon as the surge arrester parts are released and the low-melt lot holding part is restrained so that it can be moved by the force of the spring , which is released to move the fault indicator to the fault indication position.

In this case, the heat transfer in case of overvoltage can be carried out not only through the parts of the housing, but also, if necessary, through the massive contacts of the overvoltage arrester, which in the event of release accept the heat and transfer it to the holding part so that the years melt. Such housings or parts of the apparatus generally consist of a good thermal conductive material.

The holding member may consist of a known alloy, e.g. bismuth alloys with a melting point of about 110 ° C to 140 ° C.

For example, the signaling pin may consist of a die-cast zinc having a substantially higher melting point than the holding portion so that the melting holding portion does not affect it in the case of melting of the holding portion in the event of a surge arrester being triggered.

In a known manner, it may be particularly advantageous to foresee that the signaling pin is operatively connected to a switch contact of a microswitch electrically connected to the remote signaling in which the switching state is displayed.

In this way, remote signaling, for example, in a switchgear or in a computer system connected to the surge system, can be connected to the fault indicator located on or in the housing of the surge arrester. In this case, even if the surge arrester is installed or attached, the ability to operate or the operation of the surge arrester may not be displayed remotely. To this end, the signaling pin switches after the holding part is melted and the microswitch contact spring spring is released. The contact switch of the microswitch is thus positioned in the direction of movement of the signaling pin and, in the event of triggering after the release and movement of the signaling pins, is switched by the molten holding part when the spring is released.

• · · · ·

In particular, it may be particularly advantageous to provide that the signaling pin is longitudinally guided on the metal part of the housing of the overvoltage arrester and has a notch or similar recess in which the block engages a portion of the holding portion.

In this case, the signaling pin is held solely in the area of its force notch of the spring so that as soon as the retaining member located in the notch or similar recess is melted, the signaling pin is released and moves in accordance with the longitudinal guide upon release. .

In particular, it may be particularly advantageous to assume that the holding portion consists of a catfish.

The use of catfish as a holding part is a particularly cost-effective and easy-to-use solution. In doing so, the velvet can consist of a pole section, resulting in particularly low manufacturing costs.

Furthermore, it may be particularly advantageous to provide in the housing part a first hole in which the signaling pin is longitudinally guided approximately parallel to the wall of the housing, wherein a second hole is formed in the housing portion transversely to the first hole, i.e. in the intersecting region, and in the initial position, the venom is disposed to extend through the notch of the signaling pin.

With this arrangement of two holes arranged side by side, the signal pin on one side and the positional securing pin for the securing pin may be biased against the spring, in particular simply positioned on parts of the surge arrester housing. After warming up the som, the somag, which extends through the notch of the signaling pin and releases the signaling pin, moves so that, through the force of the spring being released, it moves inside the longitudinal guide wound by the first hole. . During this signaling movement, the ski pin, on the one hand, switches the microswitch switch contact and, on the other hand, moves the failure indicator from the starting position to the fault indication position.

In addition, it may be particularly advantageous to have a defect indicator located on the housing or integrated in the housing, a window or a cavity area in which the indicator bar associated with the signaling pin and showing its ability is visible from the outside operation (starting position) or inability to operate (fault indication position) of the surge arrester.

This enables the user to visually detect the actual state, namely the ability to operate or the inability of the surge arrester to operate in an extremely fast and simple way.

In particular, it may be advantageous, in particular, that the indicator strip in the window or cavity area shows the starting position by means of the green partial area of the indicator strip and the position of the failure indication by the red partial area of the indicator strip.

In particular, with the easily recognizable signal colors green and red, which signal the actual state of the surge arrester, it is also possible for technically less experienced users to recognize the actual state of the surge arrester in a particularly simple way. In doing so, the indicator strip shows a green area in the starting position in which the surge arrester is capable of operating, and in the fault indication position the red area inside the window.

In addition, it may be particularly advantageous to provide that the indicator strip consists of heat-resistant paper.

Alternatively, it may be particularly advantageous to provide that the indicator strip consists of a heat-resistant plastic film.

The construction of an indicator strip made of heat-resistant paper or heat-resistant foil ensures that even when heated, it can show the actual state as desired when the surge arrester is triggered. This prevents heat damage from both the heat-resistant paper strip and the heat-resistant plastic film.

It may also be particularly advantageous to have a signaling pin on its front face facing the first end of the indicator strip with a toothed slot and a broken area of the first end of the indicator strip, which end is held by the toothed, in the slot.

In particular, the broken area of the first end of the indicator strip and the fastening area with the notches in the signal pin slot may in each case be advantageously provided in such a way that the parts V are centered in one another.

In such a structure, the indicator strip, with its first end, can be inserted into the slot formed on the signal pin in a particularly simple manner and secured there by glazing. In particular, the V-shaped two end-to-end picking ends allow the fractured area of the indicator strip to be centered on the attachment area with the notches in the pin of the signaling pin.

Finally, it may be particularly advantageous to provide that the broken area of the first end of the indicator strip has a V-shaped recess in which a V-shaped projection formed on or in the attachment region is arranged in the assembled position.

By means of a V-shaped recess at the broken end of the indicator strip surrounding the V-shaped projection formed on or in the attachment area, a forced centering of the broken indicator tape area on the attachment area is provided to open the signal pin so that holds positionally fixed and centered against lateral unwanted slipping or displacement.

An exemplary embodiment of the invention is presented in the figures and described in greater detail below.

Figure 1: Part of the surge arrester according to the invention in perspective view;

Figure 2: Same arrester in lateral view;

Figure 3: Enlarged detail of Figure 2;

Figure 4: Signal pin with indicator strip located on it;

Figure 5: Signal pin in perspective view;

Figure 6: Same cross-sectional side view pin;

Figure 7: Indicator bar in perspective view;

Figure 8: Same strip in lateral view;

Figure 9: Same band in front view;

Figure 10; Signaling pin with indicator strap in front view with catfish; Figure 11: Same pin in further view.

The figures show parts of the surge arrester for electrical appliances. The surge arrester has a fault indicator on its housing 1 or in its housing 1 (not shown in the figures) with a signaling pin 2. The signaling pin 2 is directly or indirectly adjustable from a starting position signaling the ability of the surge arrester to function in the fault indication position in the event of a fault. heating the surge arrester. The signaling pin 2 is then held in the starting position in a position biased against the force of the spring 3. The signaling pin 2 is thus adjustable to the fault indication position so that the short-circuit current flows through the surge arrester and its or its structural parts warms.

According to the invention, a low-melting lot holding member in a starting position held by an overvoltage arrester holds a signal pin 2. The holding part retains the overvoltage arrester parts which, in the event of a failure, heat up and, in the event of a failure, heat the overvoltage arrester parts. signaling pin 2. Signaling pin 2 can now only move with the help of the released spring with respect to the housing 1 or parts of the housing 1 and the failure indicator is moved from the starting position signaling the ability of the surge arrester to the fault indication position signaling the inability to operate surge arrester.

In addition, the signaling pin 2 is operatively connected to the switch pin 4 of the microswitch 5. The microswitch 5 is electrically connected to the remote signaling, in which the switch state of the surge arrester is displayed or can be displayed. In this way, even with a visually inaccessible or inaccessible surge arrester, the switching state can always be displayed so that it is also visible from a distance whether the surge arrester is capable of operating or not.

The signaling pin 2 is longitudinally guided on a part 6 of the housing of the surge arrester and has a notch 7 or a similar recess in which a portion of the holding part is blocked. According to the invention, the holding member is formed from a somik 8. Somik 8 may, for example, consist of a section of a rod of a low-melting lot, which is made extremely cost-effective.

As can be seen in particular from Figure 3, a first hole is arranged in the housing part 6, in which the signaling pin 2 is longitudinally guided approximately parallel to the wall of the housing. The housing wall and housing part 6 preferably comprise well-conductive metal. In this case, a second hole is formed in part 6 of the housing, which runs transversely to the first hole, intersecting in the partial region. Somik 8 is positioned inside the second hole in the starting position to extend through the notch 7 of the signaling pin 2. After heating of the housing part 6, when the surge arrester is triggered, the somyak 8 stands and releases the movement of the signaling pin 2 by means of a spring which is released. In this way, after fusion 8, longitudinal movement of signaling pin 2 is made, whereby signaling pin 2, on the one hand, switches the switch contact 4 of the microswitch 5 and, on the other hand, moves the failure indicator from the starting position to the fault indication position.

The heat transfer in the event of the surge arrester being triggered on the som 8 can also be carried out through the massive contacts of the electrical system, which accept the heat and transfer it to the som. These may be, for example, structural members of the housing 1 or arranged on or in the housing 1, for example on or in the housing housing 1.

For a particularly fast and simple recognition of the ability or inability to operate the surge arrester, a fault indicator is located on the housing 1 or integrated in the housing 1, a window or a cavity. An indicator strip 10, which is connected to the signaling pin 2, is visible externally from the window or cavity area. The indicator strip 10 indicates the ability to operate (starting position) or the inability to operate (fault indication position) of the surge arrester. In this case, the indicator strip 10 in the window or the cube area shows the starting position with the help of the green partial area of the indicator strip 10 and the position of the failure indication with the help of the red partial area of the indicator strip 10. This enables even less technically experienced users to quickly and easily recognize the actual situation, ie the ability to operate or the inability to operate the surge arrester.

In the embodiment, the indicator strip 10 consists of a heat-resistant plastic film. Alternatively, the indicator strip 10 may also consist of heat-resistant paper or similar heat-resistant material.

For fast and easy attachment of the indicator strip 10 to the signaling pin 2, the signaling pin 2 has a slot 9 with a notch on its front face facing the first end of the indicator strip 10. In the slot 9, the broken area 11 of the first end of the indicator strip 10 is disposed and stuck. The broken area 11 of the first end of the indicator strip 10 is held with its end at the notch of the slot 9.

The broken area 11 of the first end of the indicator strip 10 and the fastening area with the notches in the slot 9 of the signaling pin 2 each have the shape of a letter V such that the parts are centered in one another. In this embodiment, the broken region 11 of the first end of the indicator strip 10 has a V-shaped recess 12 in which the V-shaped projection 13 formed on or in the attachment region in the slot 9 of the signaling pin 2 is arranged in the assembled position. This achieves self-centering of the indicator strip 10 with respect to the attachment area of the signaling pins 2, the top of which substantially prevents the laterally broken area 11 of the indicator strip 10 from the attachment area in the slot 9 of the signaling pins 2.

The invention is not limited to embodiments, but can be modified within the scope of the disclosure.

All individual features and combinations thereof disclosed in the description and / or in the drawings are to be construed as features of the invention.

List of markings signal box ski pin spring switch contact micro switch part of notch housing (at 2) somic slit indicator strip broken area (at 10)

V shape at 11

V shape at 9

Claims (12)

Patent claims 1. An overvoltage arrester for electrical appliances, wherein the overvoltage arrester has, on its housing (1) or in its housing (1), a failure indicator with a signaling pin (2) that can be directly or indirectly adjustable from a starting position, signaling the ability to operate overvoltage of the arrester, to the fault indication position in the event of a faulty overvoltage arrester, the signaling pin (2) being held in the starting position in a position biased against the force of the spring (3), and thereby adjustable to the fault indication position so that the short-circuit current it flows through the surge arrester and its or its structural parts is heated, characterized in that the holding part of the low melting lot in the starting position held by the surge arrester holds the signaling pin (2), while the holding part retains the parts of the surge arrester arresters, which heat up in the event of failure and, in the event of failure, heat the parts of the overvoltage The lanyard stops and releases the signaling pin (2). 2. An overvoltage arrester according to claim 1, characterized in that the signaling pin (2) is operatively connected to the switch contact (4) of the microswitch (5), which is electrically connected to the remote signaling, in which the switching state is displayed. An overvoltage arrester according to claim 1 or 2, characterized in that the signaling pin (2) is guided longitudinally at a portion (6) of the overvoltage arrester housing and has a notch (7) or similar recess in which a portion of the holding portion is blocked. A surge arrester according to any one of claims 1 to 3, characterized in that the holding part consists of a catfish (8). 5. An overvoltage arrester according to claim 4, characterized in that a first hole is arranged in the housing part (6) in which the signaling pin (2) is longitudinally guided approximately parallel to the wall of the housing, in which the housing part (6) is formed a second hole extending transversely to the first hole, intersecting in the partial region of the intersection, and in the starting position the somic (8) is arranged such that it extends through the notch (7) of the signaling pin (2). 6. An overvoltage arrester according to any one of claims 1 to 5, characterized in that the failure indicator is located on the housing (1) or integrated in the housing (1), a window or a cavity area in which it is externally a visibly positioned indicator strip (10) connected to the signaling pin (2) and showing the capability of operation (starting position) or inability to operate (fault indication position) of the surge arrester. 7. An overvoltage arrester according to claim 6, characterized in that the indicator strip (10) in the window or cavity area shows the starting position by means of the green partial area of the indicator strip (10) and the position of failure indication by the red partial area of the indicator strip (10) . An overvoltage arrester according to claim 6 or 7, characterized in that the indicator strip (10) consists of heat-resistant paper. 9. An overvoltage arrester according to claim 6 or 7, characterized in that the indicator strip (10) consists of a heat-resistant plastic film. An overvoltage arrester according to any one of claims 6 to 9, characterized in that the signaling device has a ski pin (2) on its front face facing the first end of the indicator strip (10), a slot (9) with a toothed, and the broken area (11) of the first end of the indicator strip (10) is positioned and stuck in the slit (9), the end of which holds the tooth. 11. An overvoltage arrester according to claim 10, characterized in that the fractured area (11) of the first end of the indicator strip (10) and the fastening area with the notches in the slot (9) of the signaling pin (2) each have the shape of a letter V such that it divides centered they kill each other. A surge arrester according to claim 10 or 11, characterized in that the broken area (11) of the first end of the indicator strip (10) has a V-shaped recess (12) in which a projection (13) is arranged in the assembled position the letter V formed on or in the attachment area.