EP2443708A1

EP2443708A1 - Housing assembly for multi-pole surge protection devices

Info

Publication number: EP2443708A1
Application number: EP11722418A
Authority: EP
Inventors: Stephan Hierl; Michael Waffler; Uwe Strangfeld
Original assignee: Dehn and Soehne GmbH and Co KG
Current assignee: Dehn SE and Co KG
Priority date: 2010-06-01
Filing date: 2011-05-27
Publication date: 2012-04-25
Anticipated expiration: 2031-05-27
Also published as: EP2443708B1; CN102948023B; PL2443708T3; DE102010033764A1; CN102948023A; WO2011151262A1

Abstract

The invention relates to a housing assembly for multi-pole surge protection devices, comprising a base part (1), which receives individual modules (2) provided with electrical outside connections, wherein at least one individual module (2) comprises a horn gap and each individual module (2) consists of insulating material half shells, which encapsulate the respective spark gap, and at least the individual module (2) comprising the horn gap comprises a cooling space for electric arc-related gases between the insulating material half shells. Moreover, a shrouding cover (8) is present, which encloses the individual modules (2) and, on the assembly side, is positively and/or non-positively connected to the base part (1), wherein the shrouding cover (8) comprises windows (10) for a function display of the individual modules (2) in the upper cover face. According to the invention, first insulating material partitions (14), which extend from the bottom upward, are designed in the base part (1) and connected thereto, wherein said partitions delimit respective chambers for the individual modules. Second insulating material partitions (15), which extend in the direction of the base part (1), are designed in the shrouding cover (8) and connected thereto, the locations and positions of said partitions being complementary to the first insulating material partitions (14) so as to form the chambers.

Description

Housing arrangement for multi-pole overvoltage protection devices

description

The invention relates to a housing arrangement for multi-pole

Overvoltage protection devices with a base part, which receives individual modules provided with external electrical connections, wherein at least one individual module has a Hörnerfunkenstrecke and each module consists of Isolierstoffhalbschalen which encapsulate the respective spark gap and at least the single module with Hörnerfunkenstrecke between Isolierstoffhalbschalen a cooling space for

arc-related gases, further comprising a cover, which encloses the individual modules and the mounting side is positively and / or non-positively connected to the base part, wherein the cover in the hood top window for a function display of the individual modules according to the preamble of claim 1

DE 101 25941 B4 discloses a compact arrangement for multi-pole surge current-proof surge arresters with internally wired encapsulated spark gaps arranged essentially parallel in a housing. The local housing has a provided with partitions trough shape, wherein the housing chambers thus formed record the pressure-tight encapsulated individual spark gaps together with terminals. The housing pan is designed to be open at the top, wherein an insulating plate is used to the open side, having openings to contact via spring contact elements, the metallic housing of the relevant spark gaps. The spark gaps used according to DE 101 25941 B4 have a substantially cylindrical shape, wherein the trough shape is tuned to such a cylindrical spark gap shape.

In order to allow internal wiring in a multi-pole embodiment, a wiring plane is provided as a Z-shaped alternating bridge comprising two short opposing and one longer connecting legs. Tongue-like forms or

Projections, which are arranged or introduced in the region of the short legs of the wiring level swap bridge, orient themselves in the assembled state to the respective angle leg, so that a Counter bearing is created to absorb electrodynamic forces in the surge current case.

In the multi-pole surge arrester used in

Low-voltage power supply systems, eg. B. in TN-S or TT power supply systems according to DE 10001667 Cl is assumed by a U-shaped base with terminals in the body for the active lines and PE or ground potential, said in the

Cover of the base part guide means for releasably receiving electrically connectable with the terminals plug-in parts are provided with Varistor- or spark gap elements.

In the main body, respective opposite recesses and locking projections for the terminals are formed, and the terminals on the active side are designed as individual terminals and the PE or ground potential side as internally connected terminal blocks with a conductive passage clamping element. In addition, according to DE 10001 667 Cl, it is possible to conductively connect one of the terminals of the active side to a multiple plug-in contact rail on the PE or ground potential side, so that a different wiring can be realized solely by selecting the exchangeable, preconfigured terminals.

From DE 10058977 B4 is a multi-pole shock current resistant

Surge arrester having internally wired encapsulated spark gaps in a housing substantially in parallel

previously known, wherein the spark gaps have opposite, projecting contact surfaces with holes and internal threads, which are connected to outer terminals and inner contact rails. Furthermore, in this solution as well, there is a wiring plane changeover bridge having a substantially Z-shape. The spark gaps located in the base part are cylindrical, wherein the overall arrangement is enclosed by a cover.

The solutions described above, due to the cylindrical design of the spark gaps and the required minimum diameter, set a limit to the smallest possible space. In addition, the known housing arrangements are not suitable for receiving Hörnerfunkenstrecken from which

Arc-induced gases emerge in cooled form for pressure equalization.

It is therefore an object of the invention to develop a further

Specify housing arrangement for multi-pole overvoltage protection devices with a base part and a cover, which is suitable for receiving individual modules, which have both a sufficient lightning current carrying capacity and Folgestromlöschfähigkeit, and where the necessary electrical creepage distances are complied with despite cramped space. In addition, the internal one

Interconnection of the individual modules to realize so that shock-induced forces either avoided from the outset or safely absorbed and derived without damage or destruction of the housing.

The solution of the object of the invention is achieved by a

Housing arrangement according to the feature combination according to claim 1, wherein the dependent claims represent at least expedient refinements and developments.

It is therefore of a housing arrangement for multipole

Overvoltage protection devices with a base part assumed, which receives provided with external electrical connections individual modules. The individual modules have a very narrow design. At least one individual module has a horn spark gap, and each individual module consists of Isolierstoffhalbschalen which encapsulate the respective spark gap.

At least the single module with Hörnerfunkenstrecke has between the Isolierstoffhalbschalen a cooling space for arc-induced gases, which opens into at least one opening. Furthermore, a cover is provided which the individual modules to form a compact

Arrangement encloses and which mounting side is positively and / or non-positively connected to the base part, wherein the cover in the hood top window for a function display of the individual modules having. The cover consists, as well as the base part, of an insulating material, in particular plastic material.

According to the invention are in the base part connected to this, from the bottom upwardly ersteckende first Isolierstofftrennwände

formed, each delimiting chambers for the individual modules.

In the cover are connected to this, in the direction

Base part extending second Isolierstofftrennwände present, whose position and positioning is complementary to the first Isolierstofftrennwänden for chamber formation.

Furthermore, in the base part outside the space for receiving the respective individual modules at least one pressure compensation chamber

provided, which is on the gas side with existing in the bottom region of the base part labyrinth-like stomata.

The gas outlet of the cooling space of a single module used in this respect in the base part is oriented to the aforementioned pressure equalization chamber to a meander flow with the result of another

Cooling to reduce the flow velocity of the gases to ensure. Due to the cooling module located in the individual module in conjunction with the pressure compensation chamber and the openings, a complete encapsulation results electrically seen, and there are no hot gases, as in classic so-called ausblasenden

Surge arresters is the case.

According to the invention, the particle or gas flow over the

Pressure compensation chamber and the openings a multiple change of direction in the sense of a meander flow. For this purpose, the chambers may have individual chamber sections with deflection parts.

The individual modules are separated in the base part by the Isolierstoffwände and arranged vertically, each of the individual modules in the Isolierstoffhalbschalen having a passage slot to record for the interconnection of multiple modules a rigid, conductive bridge, which is perpendicular to the longitudinal axis of the standing arranged individual modules. Thereby The individual modules can be quasi threaded onto the rigid conductive bridge and strung together in the sense of a compact unit, which preassembled in such a way in the base part using there

trained chambers is used.

The first Isolierstofftrennwände extending from the bottom of the base part up, thereby reaching down to the bottom of the conductive bridge and do not hinder the insertion of the compact assembly of several Abieitern with bending in the base part not.

In the passage slot of the respective single module runs a

Spark gap electrode portion to contact directly with the conductive bridge.

In addition, one of the Isolierstoffhalbschalen, which form the housing of the single module, a recess in the longitudinal direction, d. H. perpendicular to the introduced conductive bridge, which extends to the passage slot to introduce and / or actuate a non-positive connection means between the bridge and the respective spark gap electrode section. The connecting means may be a screw which uses the appropriate connection with traction using a

large area contact between bridge and

Spark section electrode section realized.

The underside of the base part has a known return to DIN rail mounting according to relevant standards, wherein in

Base part spring-loaded, movable locking means are introduced with locking lugs.

The openings of those chambers which lie in the region of the latching means are realized via recesses provided there, wherein adjacent chambers comprise separate openings in the form of slots or the like.

The facing ends of the first and second

Isolierstofftrennwände form a free cut or a clearance that is tailored to the width and thickness of the conductive bridge. In order to is also in the field of recording the conductive bridge for the

required isolation and creepage distances and realized a separation of the individual chambers against each other.

Since the housing assembly comprising base part and cover not glued or welded, d. H. cohesively connected, but only latching connections exist, can be done via otherwise existing transitions or column a complementary pressure equalization with respect to arc-induced gases.

The invention will be explained below with reference to exemplary embodiments and with the aid of figures.

Hereby show:

Fig. 1 is a first partially broken view of the housing assembly with a chamber and

Pressure equalization opening in the area of a movable latching device for DIN rail mounting;

Fig. 2 is a view similar to that of FIG. 1, but with a second chamber for receiving a

Single module with horn spark gap and venting via pressure compensation chamber and openings;

Fig. 3 and Fig. 4 representations for the arrangement of the conductive bridge to

Connection of individual modules (with removed cover) and

Fig. 5 is an illustration of the overall arrangement with

Partially broken cover for demonstration of the first and second Isolierstofftrennwände.

The housing arrangement according to the figurative representations is based on a base part 1, which receives a plurality of individual modules 2 with spark gaps thereon. The individual modules are, as can be seen in FIGS. 2 and 3, arranged in parallel adjacent to the base part 1.

Those individual modules 2, which have a Hörnerfunkenstrecke and the Isolierstoffhalbschalen 3 a cooling room for

arc-related gases also include a flow outlet 4 in the form of a small opening.

In Figs. 1 and 2 with the arrow representations the vent, d. H. the path of the flowing gases or particles, which arise abbrand- or arc caused, represented.

The particle or gas flow is subjected to a multiple change of direction via a pressure compensation chamber 5 and stomata 6.

The gap openings 6 are formed in the illustration of FIG. 1 in the region of locking means 7 for DIN rail mounting. In the illustration according to FIG. 2, the stomata extend over slots which are located in the bottom of the base area and can be seen in the figure.

The housing arrangement further comprises a cover 8, which is held by means of snap-in connection means 9 on the base part.

In the cover 8 windows 10 are still present to detect the position of a function display 11.

In this case, each individual module 2 is provided with such a function indicator 11. Further openings 12 in the covering hood 8 allow access to screw terminals 13 located inside (see also FIG. 3).

In the base part 1 are from the ground vertically upwardly extending first Isolierstofftrennwänden 14 available, which form chambers for the individual modules 2. The first partitions 14, which differ from the

Base part 1 extend upward, positionally complementary second Isolierstofftrennwände 15 are assigned, which are located on the cover 8. The individual modules 2 are arranged separately and vertically in the base part 1 by the partition walls 14 and 15, wherein each of the individual modules 2 in the Isolierstoffhalbschalen 3 has a passage slot in order to connect a plurality of individual modules a rigid conductive bridge 16

take, which is perpendicular to the longitudinal axis of the standing arranged individual modules 2.

In the passage slot of the respective single module runs a

Spark gap electrode portion 17 to contact directly with the conductive bridge 16. One of the insulating half-shells 3 has a recess 18 in the longitudinal direction, which extends to the passage slot to a frictional connection means, for. B. a screw 19, between the bridge 16 and the respective

Insert spark gap electrode section 17 or actuate. For this purpose, in each case a corresponding bore 20 in the bridge 16 and a complementary bore in the spark gap electrode section 17 is provided.

The underside of the base part 1 has a recess 21 for

DIN rail mounting, wherein by pressing the locking means 7 by means of a withdrawal from the base part, the housing assembly of the top hat rail is releasable.

The facing ends of the first 14 and second Isolierstofftrennwände 15 form a free cut, which is matched to the width and thickness of the conductive bridge 16, as shown in FIG. 5 can be seen.

Figures 3 and 4 show the arrangement of standing individual modules 2, which can be interconnected variously. The internal bridge 16 for interconnecting the individual modules is placed perpendicular to the modules, so that current forces are reduced during discharge processes. In the

Representation of FIG. 3, right, the local module is a

Spark gap, which is connected between N and PE. Through this

Spark gap flows the entire lightning impulse current and then splits to the individual conductors N, LI, L2 and L3. Because the internal bridge 16 is vertical is conducted to the N-electrode of the N / PE spark gap, electromagnetic forces are avoided by field effect in this position.

With the help of the screw 19, an electrical connection between the respective spark gap electrode portion 17 and the conductive bridge 16 is made, wherein the currents are passed over the contact surface between the bridge and connecting legs in the spark gap module. The contact surface is very large and can easily transmit 100 kA / 350 MS lightning impulse currents.

The individual modules can be exchanged and interconnected depending on the network form. It can be TNS devices with four-network modules, TNC devices with

Three-network modules, TT devices with three-network and one N-PE module can be realized in a very narrow housing design. In the case, which is only approx. 36 mm wide, however, 1 + 1 large TT circuits or 2 + 0 device variants can also be implemented with the same individual modules. In one embodiment, the conductive bridge is fixedly connected to the N-PE module, and the other individual modules are virtually threaded onto the bridge and then inserted into the base part. However, the conductive bridge can also be mounted as a single part.

List of reference base part

Single module

half shell

flow output

Pressure equalization chamber

gap opening

latching means

cover

connecting means

window

function display

opening

clamp

first isolation partition

second isolation partition

bridge

Spark gap electrode section recess

screw

drilling

return

Claims

claims

1. Housing arrangement for multi-pole overvoltage protection devices with a base part which receives provided with external electrical connections individual modules, wherein at least one individual module a

Horn spark gap owns and each individual module

Isolierstoffhalbschalen exists, which encapsulate the respective spark gap and at least the single module with Hörnerfunkenstrecke between the Isolierstoffhalbschalen a cooling space for

Arc-related gases, further comprising a cover which encloses the individual modules and the mounting side is positively and / or non-positively connected to the base part, wherein the cover in the hood top window for a function display of the individual modules, characterized in that

- In the base part connected to this, are formed from the ground upwardly extending first Isolierstofftrennwände and these demarcate each chambers for the individual modules and

- Are formed in the cover with this connected, extending in the direction of the base part second Isolierstofftrennwände whose position and positioning is complementary to the first Isolierstofftrennwänden for chamber formation.

2. Arrangement according to claim 1,

characterized in that

in the base part outside the room to accommodate the respective

Single modules at least one pressure equalization chamber is provided, which is on the gas side with existing in the bottom region of the base part labyrinth-like stomata in connection, the gas outlet of the Abkühlraumes one used in this regard in the base part single module is oriented to the pressure compensation chamber.

3. Arrangement according to claim 2,

characterized in that

the gas or particle flow over the pressure compensation chamber and the stomata is subject to a multiple change of direction.

4. Arrangement according to claim 1, 2 or 3,

characterized in that

the individual modules in the base part separated by the Isolierstoffwände and are located, each of the individual modules in the Isolierstoffhalbschalen having a passage slot to receive for the interconnection of a plurality of modules a rigid conductive bridge which is perpendicular to the longitudinal axis of the standing arranged individual modules.

5. Arrangement according to claim 4,

characterized in that

a spark gap electrode section runs in the passage slot of the respective individual module, in order to contact it directly with the conductive bridge.

6. Arrangement according to claim 5,

characterized in that

a Isolierstoffhalbschale of the respective individual module has a recess in the longitudinal direction, which extends to the passage slot to introduce and / or operate a non-positive connection means between the bridge and the respective spark gap electrode section.

7. Arrangement according to one of the preceding claims,

characterized in that

the underside of the base part has a return to DIN rail mounting, wherein spring-loaded, movable latching means are introduced with locking lug in the base part.

8. Arrangement according to claim 7,

characterized in that

the gap openings of those chambers which are located in the region of the latching means are realized via recesses provided there, wherein adjacent chambers comprise openings in the form of separate slots.

9. Arrangement according to one of claims 4 to 8,

characterized in that

the facing ends of the first and second insulating partitions form a cutout matched to the width and thickness of the conductive bridge.