DE202005014186U1 - Over-voltage suppressor for industrial bus bar distribution system, has connection point that interacts with a status monitoring circuit, and module-shaped structural component surrounded by housing adapted to respective application - Google Patents

Abstract

The suppressor has a carrier plate (1) exhibiting a connecting flange-section. A voltage-limiting component is connected with the plate. A connection point for a fiber-optic transmission line is provided at the section. The connection point interacts with a status monitoring circuit, where the mentioned components form a module-shaped structural component, which is surrounded by an external housing adapted to respective application.

Description

The The invention relates to a surge arrester arrangement for use in industrial busbar distribution systems and equipped with such systems Switchgear with internal low inductance and shock current resistant Wiring as well as a housing component executed support plate according to the generic term of claim 1.

Surges, as they occur in switchgear, can with conventional protection components, such as e.g. Continuous current-quenchable spark gaps or Varistorableitern on a tolerable Voltage level can be reduced. However, the concept is conventional protection devices In principle, little suitable, since they are usually for another Installation environment in which cable connections represent the common connection technology, are designed. If such devices in contrast changed environment a busbar system, may e.g. via the impedances of connecting cables or contact junction resistors of theirs not adapted connection technology additional overvoltages arise, which are detrimental to an otherwise achievable level of protection.

industrial Busbar distribution systems and such switchgear have to otherwise usual Building distribution systems another conception. This is due to the fact that in these Switchgear a first division of the main circuit of the power source takes place in single circuits, at their end or branch points themselves For example, a variety of known building main distributor are can, which the energy fed in such a way in terms of power-reduced further circuits, i.e. Subdistribution, or to end or load circuits split.

Out Busbar distribution systems are therefore complex systems, such as e.g. Districts or industrial plants supplied with electrical energy. According to the high achievements in this area for distribution abut, are the current-carrying Conductors typically as copper bars, i. Busbars executed. These Rails have a big one Cross section and are usually not isolated to improved by cooling conditions the cross section performance better to exploit.

For the resources, which are used in this area, this result from the in the subordinate systems widespread connection technology completely isolated by insulated wires other connection and operating conditions.

Bus distributor have a higher and higher capacity and achieved reliability, which also on one constantly increasing degree of automation of those used there Resources is due. The necessary for this Electronic circuits act due to the high integration density increasingly sensitive to Tensions and must therefore for availability reasons effective against voltages from the various sources of interference, those from the environment of a switchgear as well as external sources can affect them, protected become.

The Effects of overvoltages on the control electronics of a switchgear depend on various parameters from. The most important parameters are the degree of voltage overshoot, the on Input of the electronic module comes into effect, as well as their Period of time.

A effective protection against overvoltages must therefore be adapted to the application protection level and have a small reaction time, thus also fast transient overvoltages to safe Values are limited.

The sources of interference In the environment of a switchgear are mainly transient sources of interference. The noise levels generated by them have a very different energy level, which is reflected in their time course as well as the magnitude of the current and voltage values and their rates of change makes noticeable. In addition, you can the noise levels over different Media, e.g. as an electromagnetic wave through the air or as a line-bound Current / voltage pulse spread and so in the entire system at different Jobs come into effect.

electromagnetic Waves that are over the air spatially can spread in line systems or existing conductor loops and equipment couple and thus act as a secondary conducted fault. rarer lightning overvoltages have an energy related relatively high level of interference up to the destruction of Resources are known to pose the greatest threat to electrical equipment or electronic equipment and its components. Especially high surges arise along with or against discharges that lead directly coupled lightning currents.

In order to keep the high destruction energy resulting from such effects away from a system to be protected, lightning current surge arresters are used in distribution systems. Such arresters have in comparison to the primary disturbance on very small residual levels and protect thereby the subsequent resources against destruction by flashovers and arcs. A prerequisite for achieving such a high level of protection is a suitably designed connection technology which minimizes or even ideally avoids even induction loops during the installation of the outer connection lines.

So far Do you help yourself with the use of surge arrester arrangements in industrial busbar distribution systems with standard equipment, the neither the connection nor the mounting technique the necessary Requirements for have an optimized use. Concrete is the previous housing technology for resources, e.g. Fasteners for Snap-on holder on a DIN rail, not for use in switchgear, but for designed the distributor installation. The conventional connection technology via screw terminals does not correspond to the connection technology via bolts and connecting lugs, as they are preferably used in the switchgear connection technology. To the terminals of equipment for installation in standard distribution systems can the required cable cross sections or conductor geometries not be connected. About conventional Connection technology can not be used in switchgear to provide the necessary Realize low-impedance connections to a system compatible Ensure protection level. Furthermore, possible short circuits in the arrester path external short circuit fuses, which require additional space and thereby further costs regarding Cause procurement and maintenance.

Of others it is very awkward In busbar systems a DIN rail for the otherwise usual, introduced in standard distributors Snap fastening of the devices to be attached, e.g. the one for this necessary mounting plate system-conditioned is not available.

One Another disadvantage is that the necessary connection technology the protective effect of the surge arrester detrimental can be, because as a rule long distances between the connection points, between those the overvoltage should be limited to be bridged.

Further Problems can occur when an externally provided arrester fuse has tripped. For this Case it is necessary to change the state of the associated arrester too evaluate before a new fuse link can be inserted. This requires extensive measurements on the arrester, some of them special testing equipment presuppose, resulting in higher Costs leads.

Under Consideration of the above, technical solutions have become known where surge protectors, the for the DIN rail mounting are designed by means of mounting on special Adapter arrangements for the insert can be supplemented on busbars.

For example, be on the DE 200 04 593 U1 directed. There is assumed by a busbar system with one or more busbars, which are connected by means of a surge arrester with a reference potential. The local system is characterized by an adapter bridge, which can be placed transversely on the busbar and which has a shock-current-resistant contact for contacting the busbar and which has at least one slot which has at least one plug contact which is electrically connected to the contact of the busbar. The surge arrester is designed as a plug-in module for the corresponding receptacle in the slot of the adapter bridge and has at least one mating contact engageable with the mating contact and also a reference potential terminal, which is connectable to the reference potential of the system. The disadvantage of this solution is, inter alia, that such an adapter assembly is very costly and alone by the use of an adapter, the advantage of extremely short connection lengths is not reached or partially nullified.

In addition, be on DE 196 26 390 C2 and the local electrical terminal with busbar connection referenced. This terminal, which is designed in particular as a terminal block, comprises an insulating housing with at least one tension spring, wherein the insulating housing has at least one conductor insertion opening for insertion of an electrical conductor to be connected and at least one actuating opening for insertion of an actuating tool for opening the tension spring. The tension spring in turn has a clamping leg with a recess for insertion of the electrical conductor to be connected, an approximately perpendicular to the clamping leg extending support leg and the clamping leg and the plant leg connecting back. The insulating housing in turn has at least one busbar receptacle. The busbar receptacle is designed in a plane with the plant leg of the tension spring, so that the busbar in the inserted state directly on the plant leg of the tension spring under spring force of the same, whereby a direct or indirect contact with the busbar is possible by the tension spring with imported electrical conductor.

at this terminal with busbar connection is as additional Disadvantage given that for the mounting on an operating tool be resorted to must, especially when working under tension to problems to lead can.

The mentioned above solutions The prior art are on snap-in contacts or a snap-in connection designed in many cases not the desired one Surge current-carrying capacity possess what an application in industrial plants largely excludes.

Out The above, it is therefore an object of the invention, a surge arrester arrangement for use in industrial busbar distribution systems and with such Equipped systems Indicate switchgear, the electrical properties on the aforesaid Environment are adapted and both the connection technology and the equipment the arrester arrangement is extended so that an application or Installation, without additional limitations to be considered, possible is.

According to the invention are all Functions of the surge arrester including the externally arranged according to the prior art components housed on an assembly. This module forms an electrical and mechanical unit, which is based on the external design of the Assembly surrounding housing, as well as the applied connection technology is tuned.

According to the invention, the surge arrester arrangement as a mechanically stable, self-supporting unit combined in a modular manner, which also provides the necessary mechanical strength of the entire arrester ensures. It may be the outer casing contour designed individually and adapted to the respective application be designed so that no additional support elements, such as webs or brackets, become necessary, so that even with smaller quantities a cost-effective production possible becomes.

The solution the object of the invention with the resulting, briefly described above Advantages are made with a combination of features according to the protection claim 1, wherein the dependent claims at least expedient embodiments and represent further education.

The created surge arrester arrangement goes from one as housing component executed support plate out. This carrier plate consists of a conductive Material and has a large area, integral connection flange section for electrical and mechanical Attachment to a busbar.

On the carrier plate is an insulating Innenentragteil located, which is the recording parallel current fuses as short-circuit and overload protection element serves.

The or the voltage-limiting components of the arrester are respectively with an electrical connection directly to the carrier plate connected, wherein the one or more electrical connections via a Busbar associated with the current fuses whose further connection to an external connection lug leads.

in the Area of the carrier plate and the local connection flange section is a connection point for an optical waveguide (LWL) transmission link, which with a condition monitoring circuit interacts.

The The aforementioned components form a modular assembly that surrounded by an adapted to the particular application case is.

Ausgestaltend is on the Innentragteil or near this support member a circuit board with an ignition and display circuit available.

The Light emission unit for the optical fiber transmission path can be carried out in an advantageous manner as a glow lamp.

The Integrated arrester fuse is designed so that it carries a current load to lead can, for that the voltage-limiting component is designed, without itself trigger, with a persistent network wake or arrester short circuit the fuse interrupts. Therefor have the parallel fuse elements a different release characteristic on.

Of the further connection leading to the outer connecting lug guided is over a mechanically-constructively reinforced portion of the outer housing and fixed a breakthrough there.

This further connection, which leads to the connecting lug, can be used analogously as a cover plate the carrier plate be formed so that on both end sides of the module a essentially parallel contact surface is formed.

The support plate and / or the aforementioned cover plate have several recesses for electrical and mechanical Attachment to the respective busbar.

The insulating Innentragteil, which is located on the support plate divides on the carrier plate located space such that on one side of the Innentragteils the one or more voltage-limiting components and on the opposite Page the current fuses and in the intermediate area the condition monitoring circuit can be arranged.

The Outside housing is with the carrier plate and / or the cover plate connected, preferably screwed.

In Embodiment of the invention, the arrester as a spark gap, Varistor or combination of these elements may be formed.

Prefers the spark gap has a cylinder housing shape and is on the Support plate standing arranged.

to optimal adaptation to a busbar distribution system is the outer terminal lug in one embodiment the invention oriented at right angles to the support plate surface.

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 typical connection situation for surge arresters in busbar distribution systems according to the prior art;

2 a perspective view of an embodiment of the surge arrester arrangement with outer housing;

3 a representation analog 2 , but without outer casing;

4A / 4B different views of the functionally essential components of the surge arrester module without support plate;

5 a block diagram with electrical interconnection of the arrangement according to 3 such as 4A or 4B and

6 a wiring example of the busbar arrester according to the invention in 3 + 1 interconnection in a three-phase system.

The Characteristics of the surge arrester arrangement according to the embodiment, which especially for Busbar systems can be designed as modified Enclosures, adapted, needs-based connection solution as well as integrated arrester fuse with condition monitoring sum up.

The housing construction of the arrester according to the invention is designed that way a large area and Thus, particularly low-impedance connection technology is given.

For this are the connections as connection surfaces, the e.g. in the form of connection flanges and / or connection lugs can be trained in the housing conception integrated.

The housing encloses a self-supporting arrangement of the individual components (see 4A and 4B ), which in their entirety constitute the function of the arrester.

These Components include overvoltage or lightning arrester as a spark gap and / or varistor and their combination or other components with similar functions; Overcurrent protection devices as short-circuit and / or overload protection and other functions, such as a trigger circuit or monitoring devices and / or monitoring displays and a status signaling.

The needs-based connection technology is functional to the environment of Application adapted to prevent inevitable joints during installation by additionally necessary clamp connections, additional impedances in the arrester path through cable lengths or installation loops due to unfavorable connection configurations arise by unwanted Voltage overshoots in addition to the protection level of the arrester to downstream resources negative act.

1 shows a typical connection situation, as it is commonly found in known busbar systems.

Of the There arrester shown is with its terminals A / B via a Connecting cable with the length L connected to a rail system, possibly one between them Connection points occurring overvoltage to limit.

As soon as the arrester FS is ignited by the overvoltage, a surge current i _s sets in whose current change speed di / dt in the conductor loops L1 / L2 produces an induction voltage depending on its conductor geometry and the stitch length L.

This induction voltage is added to the voltage U _p via the terminals A / B of the arrester to a voltage U _peff , which comes at the terminals of the protected equipment G as an overvoltage effect. As a result, the expected protection level U _{p of} the arrester can be substantially exceeded, whereby the equipment to be protected is exposed to an increased risk of destruction.

In busbar systems, this negative effect can be reduced if the two Busbars, between which the arrester must limit the voltage, are close to each other. However, this is usually not the case.

Otherwise let yourself the value of the additional disturbing Residual essentially only about the lead inductance affect the connection lines of the arrester. This is both from the cable length as well as the cable cross section. With increasing cable length decreases the line inductance with constant cross section and constant line geometry to. By contrast, cross section (field line length) and line inductance are reversed proportional, so that at the same line length and an increased Conductor cross-section / field line length a lower inductance, as in the smaller line cross-section results, or a rectangular Cross section with larger field line length a lower inductance has, as an equivalent Conductor cross section with round geometry.

So result, for example, based on a normalized lightning impulse current 10/350 microseconds for the same cross-section and the same cable length, However, different conductor geometry deviations in the induced Voltage up to twice the value. Comparatively favorable values arise in rectangular conductor geometries with high aspect ratio, e.g. 1: 100.

It is therefore in the sense of effectiveness the protective measure desirable, the line length, i.e. the stitch length to do so that their line inductance is negligible Value reduced. Because in most cases the direct connection length between the two connection points of the potentials, between which the arrester the overvoltage limit, given by the geometry of the switchgear is, in many cases the effect of the line inductance only by the cross section or whose cross-sectional geometry are influenced.

For this purpose points According to the invention the arrester a connectivity for corresponding Cable cross sections or conductor geometries.

The required optimal connection possibility is carried out with the module construction according to the invention, as described in particular in the 3 becomes clear.

Further Advantages of the busbar arrester according to the invention lie in the arrangement of an integrated short-circuit protection. By this measure the arrester becomes short-circuit proof in itself and it can external Short circuit protection measures omitted in the discharge path. Not only the cable length of the Connecting line advantageously be made short, but it eliminates a external fuse unit that would otherwise be necessary.

simultaneously the short circuit protection is considered to be a factor in the aging behavior of the Arrester adapted overload protection designed by a design according to the aging behavior the voltage limiter elements used takes place. This measure leads to a coordinated end of life of the functionally important components arresters and Arrester fuse and thus the entire functional unit, the after the trigger the arrester fuse is renewed. Once the arrester fuse has tripped, becomes the arrester element and its associated shutdown replaced at the same time, so that both elements always the same Have aging state. In this way, the short-circuit protection acts at the same time as overload protection, by not just the one-time biggest load parameter, but also a certain number of low-energy discharge processes one Can cause shutdown, the in this conception advantageously always the exchange the entire functional unit entails.

A Extensive determination of the arrester state by checking certain Ableiterparameter can be omitted. The control of the arrester state reduces to a visual check of its status display, the e.g. monitors the voltage between the arrester element and fuse element.

arrester and arrester fuse thus form according to the invention a coordinated Arrester system, on the one hand from a powerful arrester and secondly adapted from one of the performance of the arrester Arrester fuse exists. The main feature of the vote between Arrester fuse and arrester is that the arrester fuse the surge current load, for the the arrester is designed to run without triggering.

As soon as exceeded this value will solve that Arrester fuse off. Leads the dissipation process to a long-lasting network follow current or to a short circuit in the arrester, interrupts the arrester fuse the occurring short-circuit current.

In order to achieve a tuning of the two elements in the case of the arrester system according to the invention, the arrester fuse consists of two parallel current fuses with different tripping characteristics. A first of the two arrester fuses reacts to exceeding the surge current specified for the arrester. If the arrester is then damaged in such a way that it can no longer extinguish the line follow current directly following the discharge process of the surge current, Also, the second arrester fuse of the parallel circuit is triggered, which has a switching characteristic for relatively long-lasting, compared to the surge current but smaller current values. If, on the other hand, the arrester retains its extinguishing function, only partial disconnection takes place and the protective function of the arrester remains intact. The limited function now given can meet the arrester until either another surge current triggers the only long-term current fuse that is only functional or the arrester reaches its aging limit via the subsequent currents that occur as a result of further discharge processes. Alternatively, due to the coordination of the two fuses, tripping in the event of extreme overload due to shock or secondary currents will work immediately, so that there is no safety gap in such a case.

The local surveillance the state of aging of the arrester system according to the invention takes place via a condition monitoring the arrester fuse. This local condition monitoring can be done by a Remote inquiry replaced or supplemented become.

in the embodiment a busbar arrester according to the invention the remote inquiry is based on a light wave conductor route, the each a photoreceiver is associated with the loss of the light signal via a potential-free contact a fault message triggers.

About this contact can be made in terms of circuitry a collective fault message summarized all the discharge paths, such as a three-phase system to a common message, as in the 6 is shown.

The Use of an optical fiber transmission system has over other systems considerable advantages. So the problem of touch protection related be released with a voltage tap after the arrester fuse, there at the junction for the outer connection the system no voltage, but only light energy from one inside the case housed light transmitter issued as evaluable status message is, is applied.

The Installation of an external signal circuit is thus completely unproblematic.

At long last arise in an optical waveguide transmission arrangement more Advantages in the harsh environment of a busbar distribution system.

There over here the busbar system flow high currents, very high magnetic fields, which are scattered in lines and corresponding interference voltages cause. These interference voltages in turn cause system disorders, which can lead to a misinterpretation of the remote inquiry. Under certain conditions may be in accordance with the here proposed solution be avoided that arranged in the signal line of the remote query itself overvoltage protection devices Need to become, a destruction prevent the interrogator by high-energy surges.

There the arrester-side transmitting device of the monitoring device only the task is to release the tension after the separating fuse element to monitor This can be done very easily and inexpensively. Here is particularly advantageous if instead of a usual Semiconductor transmitting diode a simple glow lamp as optical fiber light emitter is used.

If the busbar arrester according to the invention connected as N / PE arrester in a so-called 3 + 1 arrangement is, there is the possibility the interruption associated with the disconnection of the arrester fuse of the neutral for monitoring to use. By an appropriate interconnection is thereby the Neutral for power supply of the remote control unit interrupted, what ultimately as well as the failure of the light signal to a response the collective fault message leads. Next The arrester fuses can also monitor other safety-related Capture functions within the arrester system. So it is e.g. possible, to secure the circuit of a trigger circuit. Would then e.g. Instead of the arrester fuse triggering this fuse, the function of the Arrester system restricted. In the case of a detection of the state of this backup, on the other hand, a Error message, what synonymous for This case would lead to the replacement of the arrester.

In the embodiment of a surge arrester arrangement for use in busbar distribution systems according to 2 is first of a base plate or carrier plate 1 assumed that at the same time serving the housing, hood-like trained and inexpensive to create outer housing 2 on its open side.

The carrier plate 1 is designed as a connection flange for connecting the arrester to a busbar and also serves as a mechanical fastening.

In order to produce the largest possible contact with the busbar, in the embodiment, two mounting recesses 1' and 1'' in the connection flange of the carrier plate 1 intended.

On the side of the flange of the base plate is a conventional plug-in adapter 3 for connecting the fiber-optic cable. Such a positioning has the advantage that the mechanically sensitive optical waveguide arrangement is protected from external mechanical influences.

Opposite the flange connection of the carrier plate 1 there is a connection lug as another connection 4 that consists of a mechanically reinforced breakthrough 2 ' the front side of the housing 2 led out.

This connecting lug 4 is designed so that not only round but also rectangular cross-section can be easily connected.

The outer housing 2 is at its corners from below with the connecting flange or the carrier plate 1 with eg four fastening screws 11 ' to 11 '''' screwed (see 3 ).

Like from the 3 . 4A and 4B can be seen, the internal structure of the surge arrester arrangement is designed as a self-supporting unit, which is an Innentragteil 5 grouped, with the electrical components via busbars 6 ' . 6 '' are connected, which not only facilitates the installation of the busbar arrester, but also allows the integration of this structure in different housing concepts in a simple way.

There is according to the invention the possibility of this in the 4A and 4B shown use modular in a cuboid or cylindrical housing, the end faces on both sides a contact surface similar to the support plate 1 exhibit.

Such a housing construction may, for example, constitute an insulating support, as used in switchgear construction as an insulating spacer between two parallel busbars or as an insulating attachment of the rails to support frames. As already mentioned, eliminates the disturbing line inductance in the arrester branch, as in 1 presented with a view to the state of the art, completely.

At long last allows such a configuration of the contact surfaces special connection options e.g. above Ball studs or male connectors. This way becomes a safe Exchanging the arrester also possible under voltage.

The parallel-connected current fuses 7 ' . 7 '' be from the busbars 6 ' and 6 '' contacted while mechanically held, as shown in the illustration in particular 4B becomes clear.

As a spark gap 8th Preferably finds a spark gap with a cylindrical outer housing application, which standing on the support plate 1 can be mounted.

The interior support part 5 divides the installation space on the carrier plate 1 in one according to 3 left-sided and right-sided area. In the left-hand area is the spark gap 8th and a circuit board 9 having a combined ignition and display circuit. The right-hand part of the installation space takes the parallel-connected current fuses 7 ' and 7 '' as short-circuit and overload protection elements.

The contact between the ignition and display circuit 9 and the potential of the carrier plate 1 done by a contact clip 9 ' , like in the 4A recognizable. In this illustration is also clearly becoming, as the ignition of the spark gap and to generate the optical fiber monitoring signal or the N-conductor interruption to the evaluation device FM after 6 necessary ignition and display circuit within the quasi inner housing forming support member 5 is included.

5 shows the schematic diagram shown with electrical symbols and thus also the essential electrical interconnection of the arrangement of the components according to the representations 3 , such as 4A and 4B of the busbar arrester according to the invention.

The module TRAN is located on the already mentioned circuit board and consists of a combination spark gap ignition device and optical fiber transmitter, the potential of L via the terminal A and the arrester fuse F at point P or according to the potential of the busbar 6 '' at the point 10 ' . 10 '' monitored against the potential N / PEN at port B.

Alternatively, the assembly TRAN can be replaced by an assembly TR, which only the fused spark gap ignition device on the circuit board according to 6 having.

The 6 shows a wiring example of the busbar arrester according to the invention in 3 + 1 arrangement in a three-phase system.

Here the line-side arresters N1, N2 and N3 are provided with a voltage-monitoring transmitting device TRAN, which generates the individual optical fiber signals LWL1, LWL2, LWL3, while the arrester between N and PE (N / PE-Ab conductor) with its short-circuit and overload protection device F interrupts the neutral conductor feed to the remote evaluation FM.

These Conception of the signal evaluation of the remote inquiry causes in this Case as well as an interruption of one of the light signals LWL1 to LWL3 of the line-side arrester an error message about the respective contacts K1 to K3, which in its further expansion usually a circuit the remote monitoring operate the arrester. With appropriate connection of the contacts K1 to K3 can be either a single or a collective fault message will be realized.

1

support plate

2

outer casing

2 '

Housing bushing

3

Optical fiber plug-in adapter

4

connection tab

5

Internal support member or inner housing

6 ', 6' '

conductor rail

7 ', 7' '

current fuse

8th

radio link

8th'

ground contact

9

circuit board or combined ignition and display circuit

9 '

ground contact

10

Voltage monitoring point

11

Screw

Claims (13)

Surge arrester arrangement for use in industrial busbar distribution systems and equipped with such systems switchgear with internal low-inductance and shock-current wiring and designed as a housing component support plate, characterized in that the carrier plate consists of a conductive material and a large-scale, integral flange portion for electrical and mechanical fastening to a bus bar, on the support plate is an insulating Innenentragteil located, which serves to record parallel-connected current fuses as a short-circuit and overload protection element, or the voltage-limiting components of the arrester are each connected directly to the carrier plate with an electrical connection, said or the other electrical connections are connected via a busbar with the current fuses, the further connection to a e outer terminal strip leads, in the region of the support plate and the local flange portion there is provided a connection point for an optical fiber transmission path, which cooperates with a condition monitoring circuit and wherein the aforementioned components form a modular assembly surrounded by an adapted to the particular application outside housing is. Surge arrester assembly according to claim 1, characterized in that the Innentragteil a PCB with an ignition and display circuit is provided. Surge arrester assembly according to claim 1 or 2, characterized in that the light-emitting unit for the Optical fiber transmission path designed as a glow lamp is. Surge arrester assembly according to one of the preceding claims, characterized that the integrated arrester fuse the surge current load for which the voltage-limiting component is designed, can lead, without triggering itself, taking in the event of a persistent line current or arrester short circuit the Interrupts fuse and this the parallel fuse elements a different release characteristic exhibit. Surge arrester assembly according to one of the preceding claims, characterized that the further connection, which is led to the outer connecting lug, over a mechanically-constructively reinforced Fixed section of the outer housing is. Surge arrester assembly according to one of the claims 1 to 4, characterized in that the further connection to a Connecting lug leads, formed as a cover plate analogous to the support plate is, so that a contact surface is formed on both end sides of the module. Surge arrester assembly according to one of the preceding claims, characterized that the carrier plate and / or the cover plate a plurality of recesses for electrical and having mechanical attachment to the respective busbar. Surge arrester assembly according to one of the preceding claims, characterized that the insulating inner support part, which on the support plate is located on the support plate shared space such that divides on one side of the Innentragteils the voltage-limiting components and on the opposite Page the current fuses and in the intermediate area the condition monitoring circuit can be arranged. Surge arrester assembly according to one of the preceding claims, characterized that the outer housing with the carrier plate connected, preferably screwed. Surge arrester assembly according to one of the preceding claims, characterized that the arrester as a spark gap, varistor or combination of these Elements is formed. Surge arrester assembly according to claim 10, characterized in that the spark gap a cylinder housing shape and on the carrier plate is arranged standing. Surge arrester assembly according to claim 1, characterized in that the outer connecting lug oriented at right angles to the support plate surface is. Surge arrester assembly according to one of the preceding claims, characterized in that one of the connecting flange sections is designed such that An attachment of the arrester arrangement can be carried out under tension.