• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Surge suppressor element intended to be implemented between a neutral conductor N and a potential equalization PE in the supply of current of a low-voltage network, with a housing (2), with a component (3) limiting the overvoltage arranged in the housing (2), with two connection contacts (4, 5) for the electrical connection of the surge arrester element (1) to a current path to be protected, with an electrically conductive connection element (6), with an isolating isolating element (7) and with at least one spring element,
    公开号:FR3023988A3
    申请号:FR1556674
    申请日:2015-07-15
    公开日:2016-01-22
    发明作者:Markus Philipp；Karsten Trachte
    申请人:Phoenix Contact GmbH and Co KG；
    IPC主号:
    专利说明:

    [0001] The invention relates to a surge arrester element intended to be placed between a neutral conductor 5 N and a potential equalization PE in the power supply of a low-voltage network, with a housing, with a limiting component of overvoltage disposed in the housing, with two connection contacts for the electrical connection of the surge arrester element to the current path to be protected, with an electrically conductive connection element and with a thermal cut-off connection. DE 42 41 311 C2 discloses a surge arrester element having a thermal cutoff device for monitoring the state of a varistor. In this surge arrester element, the first connection contact is connected by a flexible conductor to a conductive connecting element whose end remote from the flexible conductor is connected by a brazing point to a connection tab provided on the varistor. The other connection contact is fixedly connected to the varistor or to a connection tab on the varistor by a flexible conductor. The conductive connection element is forced by a force 25 away from the connecting element with respect to the connection tab at the breaking of the brazed connection, so that the varistor is electrically disconnected in case of overload. Thermal. The use of a flexible conductor for connecting the varistor limits the value of the maximum permissible pulsed current that can be derived by the surge arrester element. DE 695 03 743 T2 discloses a surge arrester element with two varistors, comprising two of a spring, which drives conductive connecting elements, by which the varistors can be respectively disconnected at the end of their life. The connecting elements are each formed as an elastic cutting tongue, the first end of the cutting tab being fixedly connected to the first connection contact and the second end of the breaking tab being fixed by a soldering point on a connection tab. on the varistor in normal state of the surge arrester element. The brazed connection melts in case of inadmissible heating of the varistor. Since the breaking lug is in the brazed state (normal state of the surge arrester element) and is prestressed from its rest position, the free end of the clipping tab moves away elastically from the connection tab of the varistor. softening of the brazed connection, which causes the electrical disconnection of the varistor. In order to provide the insulation resistance and leakage currents required, and to extinguish an electric arc occurring at the opening of the cutoff point, it is required to obtain as large a spacing as possible between the second end of the tab cutoff and the connection tab of the varistor when pivoting the break tab. In addition, the cross section of the break tab must not be too large for it to have a satisfactory property of elasticity. This also results in a limitation of the maximum permissible pulsed current. The known surge arrester elements are generally made in the form of "protection plugs" forming a surge protector with a lower part of the device. For the installation of such an overvoltage protection device having to protect different current paths or lines of a low-voltage network, corresponding connection terminals for the different conductors L1, L2, L3 and for the neutral conductor N and the earth conductor PE are provided on the lower part of the known protective devices. For easy mechanical and electrical contact of the lower part of the device with the respective surge arrester element, the connection contacts of the surge arrester element are in the form of plug-in pins, to which there correspond sockets connected to the connection terminals in the lower part, so that the surge arrester element can be easily stuck on the lower part of the device. The thermal cut-off devices used for the known surge arrester elements, which are based on the fusion principle of a soldered connection, have several tasks to fulfill. In the normal state of the surge arrester element, that is to say in the non-breaking state, a satisfactory and safe electrical connection must be presented between the corresponding connection contact and the surge limiter component. If a set limit temperature is exceeded, the cut-off point must allow for safe disconnection of the surge suppressor component as well as long-lasting insulation resistance and resistance to leakage currents. In addition, if the surge arrester elements are not as small as possible, so that the dimensions of the overvoltage protective devices do not exceed those prescribed for devices with a support profile, it follows that the known overvoltage protection devices do not can be implemented only in the lower and middle power classes. The known surge arrester elements are therefore designed and provided in the first place to be implemented between a phase conductor L1, L2, L3 and the neutral conductor N.
    [0002] The present invention therefore aims to make available a surge arrester element of the above-mentioned kind, which avoids the disadvantages described above, so as to make the surge arrester element equally usable if it is placed between a neutral conductor N and a potential compensation. EP. This problem is solved by the features of claim 1 for the above-mentioned surge arrester element. Unlike the known surge arrester elements, which also have a thermal cut-off device, the surge arrester element according to the invention first comprises a surge shunt filled with gas instead of a varistor as a voltage limiting component. . Strong pulsed currents up to 100 kA can therefore be derived as well. The surge arrester element according to the invention further comprises an isolating isolating element, slidably disposed on the housing and movable from a first position to a second position by the force of at least one spring element. On the surge arrester element, the first connection contact is durably electrically conductive connected to the first electrode of the surge arrester. The second connection contact is also durably electrically connected to the first end of the electrically conductive connection element.
    [0003] In the normal state of the surge arrester element, that is, when the surge arrester is not unacceptably heated, the second end of the electrically conductive connection element is electrically conductive connected to the second electrode of the surge arrester. overvoltage filled with gas, by a connection with thermal break. In the normal state of the surge arrester element, the isolating isolating element is further maintained in its first position by the connection made between the second end of the conductive connecting element and the second electrode of the surge arrester. preferably acting on a soldered connection. If the overvoltage splitter has become highly heated due to a permanent overcharge of the surge arrester element, so that a defined limit temperature is exceeded, there is a break in the thermal connection between the second end of the surge arrester. The electrically conductive connection element and the second electrode of the surge arrester, the isolating isolating element being then moved to its second position by the force of the spring element (s). In the second position of the disconnecting element, a part of the disconnecting element is disposed between the second end of the electrically conductive connecting element and the second electrode of the surge protector, so as to electrically disconnect the element. 30 surge protector. In the normal state of the surge arrester element, the isolating isolating element is held in its first position against the spring force of the spring element (s) by the brazed connection existing on the thermal cutoff link. If an inadmissible heating of the surge arrester occurs, it will also cause a heating of the brazed connection, the latter can no longer maintain the severing element in the first position against the spring force from a temperature limit defined. Since the disconnecting element is moved to its second position, the electrically conductive connection is cut between the conductive connecting element and the second electrode of the surge arrester, an electric arc possibly generated at the opening of the breaking point. being reliably extinguished by the isolating isolating member penetrating the cut-off location.
    [0004] The second end of the conductive connection element is furthermore securely isolated from the second electrode of the surge diverter by the disconnecting element also after the opening of the cut-off point, which ensures an insulation resistance and resistance to long-lasting leakage currents. The electrical connection between the connection element and the second electrode of the surge arrester is then cut first by the isolating isolating element penetrating the breaking point, and not (only) by a repulsion of the element. connection. The connecting element can therefore have a larger cross section, also allowing the conduction of strong pulsed currents by the connecting element. According to an advantageous embodiment, the insulating sectioning element has an opening by which, in the normal state of the surge arrester element, the second end of the electrically conductive connection element is electrically conductive connected to the second electrode of the shunt splitter. overvoltage by the link with thermal break. The part of the insulating disconnecting element, which in second position of the disconnecting element is disposed between the second end of the connection element and the second electrode of the overvoltage diverter, preferably adjoins the opening and presents a segment of cut that extends perpendicular to the direction of movement of the cutting element and an insulation segment which extends parallel to the direction of movement of the cutting element. The perpendicularly extending cutoff segment in this case ensures a safe break of the heated soldered connection, while the insulation segment which extends parallel to the direction of travel of the severing element provides the insulation resistance. and resistance to leakage currents. The insulation segment is dimensioned so as to also ensure in second position of the sectioning element a sufficient isolation space between the second end of the connecting element and the second electrode of the surge diverter. According to another advantageous embodiment of the invention, the surge shunt filled with gas is formed in the form of a disk and is arranged in the housing in such a way that the extension of the surge shunt from the first electrode to the second electrode is perpendicular. to the longitudinal extension of the surge arrester element. A surge arrester element with a very small construction width is thus obtained. To further facilitate the electrical connection of the two electrodes of the surge arrester filled with gas, it is advantageously provided that the two electrodes are each electrically conductive connected to a connecting element. In the normal state of the surge arrester element, the second end of the electrically conductive connection element is then connected by the brazed connection serving as a thermal cut-off connection to the connection element connected to the second surge electrode. The construction and mounting of the bridge of the surge arrester element 10 can be further simplified in that the first electrode of the surge arrester filled with gas and the first connecting element are made in one piece, ie as a single component. In order to enable safe and at the same time economical engagement of the two electrodes of the gas-filled surge diverter, the first connection element has a part which, like the conductive connection element, parallel to the longitudinal extension of the surge protective element and perpendicular to the longitudinal extension of the two connection contacts. The first connection element furthermore has a second part which extends perpendicular to the longitudinal extension of the surge arrester element and parallel to the longitudinal extension of the two connection contacts, arranged respectively at a front face of the surge arrester element and having a width substantially corresponding to the width of the surge arrester element. The second part of the first connection element can be brazed or welded simply and over a large area with the first connection contact, so as to obtain a satisfactory and durable electrical contact between the first connection contact and the first electrode of the diverter overvoltage. According to another particularly advantageous embodiment of the invention, it is provided that the connection element connected to overvoltage shunt the second electrode of the gas filled has a junction zone slightly spaced from the surface of the surge diverter. In the normal state of the surge arrester element, the second end of the electrically conductive connection element can then be connected by the soldering point to the junction zone of the connection element disposed inside the opening of the cutting element, the connecting element not being or only slightly deviated from its rest position. The spacing between the junction area of the connection element and the surface of the surge diverter is in this case adjusted to the material thickness of the isolating isolating element, so that the isolating element can be moved to the junction area of the connection element in the event of a break in the soldered connection. The conductive connection element then having to have no particular failure property, but can be made relatively rigid, the cross section of the conductive connecting element can be better adjusted to the value of the maximum permissible pulsed current. By selecting the spacing between the junction area of the connection element and the surface of the surge diverter, it will also be possible to influence the thermal coupling of the surge bridge to the brazed connection, so as to obtain a thermal coupling defined by this spacing selection.
    [0005] Concretely, a plurality of possibilities is now presented for the configuration and improvement of the surge arrester element according to the invention. On this point, reference is made to the dependent claims of claim 1 and to the following description of an exemplary preferred embodiment, in relation to the figures. These represent: FIG. 1 an example of execution of a surge arrester element according to the invention in a normal state, FIG. 2 the surge arrester element of FIG. 1 with electrically disconnected surge arrester, FIG. 3 an exploded view of the surge arrester element of FIG. 1, Fig. 4 an enlarged view of the surge diverter, and FIG. The surge arrester element of FIG. 1 with separate outer housing. The figures represent an example of a preferred embodiment of a surge arrester element 1 with a casing 2, a gas-filled surge shunt 3 being disposed in the casing 2 as an overvoltage limiter component. The surge arrester element 1 formed as a protective plug is provided with two connection contacts 4, 5 made as knife contacts that can be inserted into corresponding sockets of a lower part of the apparatus, not shown, for connecting the surge arrester element to the current path to be protected. As can be seen in particular from the exploded view of FIG. 2, the surge arrester element 1 has an electrically conductive connecting element 6 and the isolating isolating element 7 slidably disposed in the casing 2 and constructed in the manner of a contact separator. A spring element is disposed in each of the two guides 8 formed on the housing 2, for moving the insulating disconnecting element 7 from a first position (Fig. 1) to a second position (Fig. 2). Thanks to the spring elements, the cutting element 7 is thus subjected to a force which moves the cutting element 7 parallel to the lateral surface of the housing 2 and - according to the orientation of FIG. 1 - from right to left, from the first position to the second position, when the sectioning element 7 is not maintained in first position.
    [0006] In the exploded view of fig. 1 that the first connection contact 4 is electrically conductive connected to the first electrode 9 of the surge diverter 3 - at the rear in FIG. 3 - by a first connection element 18.
    [0007] The connection element 18 of FIG. 4 is in this case made in one piece with the first electrode 9 of the surge diverter 3. The other end of the connection element 18, remote from the surge diverter 3, is brazed or welded with the first contact of connection 4. The second connection contact 5 is durably electrically conductive connected to the first end 10 of the electrically conductive connecting element 6, in this case being particularly brazed or welded. In addition, in fig. 1, the second end 11 of the electrically conductive connecting element 6 is in the normal state of the surge arrester element 1 electrically conductive connected to the second electrode 13 of the surge arrester 3, by a brazing point 12 as a thermal cut bond. The brazed connection 12 presented in the normal state of the surge arrester element 1 maintains the isolating isolating element 7 in its first position against the force of the spring elements. In case of inadmissible heating of the surge diverter 3, it causes a softening of the brazed connection 12, which has the consequence that the insulating disconnecting element 7 is moved to its second position - shown in FIG. 2 - by the elastic force of the spring elements. In the second position of the disconnecting element 7, the disconnecting element 7 is located between the second end 11 of the conductive connection element 6 and the second electrode 13 of the surge protector 3, so that the surge arrester element 3 1 is electrically disconnected, the electrically conductive connection between the second connection contact 5 and the second electrode 13 of the surge diverter 3 being cut off. An electric arc possibly generated at the opening of the cutoff point is then reliably extinguished by the insulating disconnecting element 7 penetrating into the cutoff point. As can be seen from fig. 1 to 3, the insulating disconnecting element 7 has a front end face 14 adjacent an opening 15. The insulating disconnecting element 7 further has a cut-off segment 16 extending perpendicular to the direction of movement of the disconnecting element 7 and an insulating segment 17 extending parallel to the direction of movement of the disconnecting element 7. The opening 15 is thus delimited by the end face 14 on one side, and by the segment of cut 16 on the other side. In the normal state of the surge arrester element 1, the second end 11 of the electrically conductive connection element 6 is connected to the brazed connection 12 through the opening 15 in the sectioning element 7. In the exemplary embodiment of the surge element 1 according to the invention illustrated by the figures, the soldered connection 12 is not directly provided between the second end 11 of the connection element 6 and the second electrode 13 of the surge conductor filled with gas 3, but between the second end 11 of the connection element 6 and the junction zone 20 of a second connection element 19. The second connection element 19 is then, as is clear from Figs. 3 and 4, electrically conductive connected to the second electrode 13 of the surge diverter filled with gas 3, in this case being brazed or welded. The second connection element 19 further comprises a junction zone 20 spaced from the surface of the surge diverter 3 or the electrode 13, which is in the normal state of the surge arrester element 1 disposed inside the opening In the insulating disconnecting element 7. Through the junction zone 20 projecting towards the second end 11 of the connecting element 6, the second end 11 of the connecting element 6 can be connected by the connection brazed 12 electrically conductive to the connection element 19 and therefore also to the second electrode 13 of the surge diverter 3, without the connecting element 6 has to be substantially deviated from its rest position. The connecting element 6 therefore has no particular spring property. The cross-section of the conductive connection element 6 can be selected so as to also allow the bypass of relatively strong pulsed currents via the connection element 6. It is however advantageous that the connecting element 6 is made in an elastic manner. , so as to lift slightly from the junction zone 20 of the connecting member 19 or to be pushed from the junction zone 20 by the cutting element 6 moving towards its second position during the cutting process. In case of softening of the brazed connection 12 due to a too high temperature of the surge diverter 3, the breaking of the connection between the second end 11 of the connecting element 6 and the junction zone 20 of the second element connection 19 is thus obtained in the first place in that the insulating disconnecting element 7 moves between the second end 11 of the connecting element 6 and the junction zone 20 and not in that the second end 11 of the However, the connecting element 6 is resiliently made in this case, so that its second end 11 can be moved out of the housing. junction zone 20 so as not to prevent the displacement of the insulating disconnecting element 7 from its first position to its second position, in other words the insulating disconnecting element 7 is not clamped between the second end 12 of the connecting element 6 and the junction zone 20. It appears from FIG. 4 that the gas filled surge shunt 3 is disk-shaped, so that the surge arrester element 1 has a very small construction width in the illustrated arrangement of the surge shunt 3 in the shunt extension housing 2 overvoltage 3 of the first electrode 9 to the second electrode 13 perpendicular to the longitudinal extension L of the surge arrester element 1. It is further apparent that the first connection element 18 formed in one piece with the first electrode 9 5 comprises a first part which extends parallel to the electrode 9. A second part adjoins the first part, which is bent perpendicularly, so that the second part can be easily brazed or welded with the first connection contact 4 10 as it appears of fig. 3. For the optical indication of the state of the surge arrester element 1, the isolating isolating element 7 has two marks 21, 22 arranged side by side, of different colors, such as green and red, which serve as optical optical indicator for the surge arrester element 1. For this purpose, the hood-shaped outer casing 23 of the surge arrester element 1 is engageable with the casing 2, which is shown in FIG. 5, has an observation opening 24 dimensioned so as to make visible from the outside only one or the other color mark 21, 22 through the observation opening 24, as a function of the position of The first green mark 21 is in this case visible through the observation aperture 24 in the first position of the insulating severing element 7, while the second red mark 22 is disposed under the observation opening 24 in the second position of the insulating sectioning element 7.
    权利要求:
    Claims (10)
    [0001]
    REVENDICATIONS1. Surge arrester element intended to be implemented between a neutral conductor N and a potential equalization PE in the supply of current of a low-voltage network, with a housing (2), with a component (3) surge limiter arranged in the housing (2), with two connection contacts (4, 5) for the electrical connection of the surge arrester element (1) to a current path to be protected, with an electrically conductive connection element (6), with a insulating disconnecting element (7) and with at least one spring element, wherein a gas-filled surge shunt (3) is used as an overvoltage limiter component, wherein the insulating disconnecting element (7) is arranged sliding on the housing (2) and can be moved from a first position to a second position by the force of the at least one spring element, where the first connection contact (4) is electrically connected to the first electrode (9) of the surge arrester (3), the second connection contact (5) being electrically conductive connected to the first end (10) of the electrically conductive connecting element (6), where in the normal state of the surge arrester element (1), the second end (11) of the electrically conductive connecting element (6) is electrically conductive connected to the second electrode (13) of the surge arrester (3). ) by a thermal cutoff linkage (12), and the isolating isolating element (7) is held in its first position, andwhen, if a prescribed limit temperature of the overvoltage splitter (3) is exceeded, the connection (12) between the second end (11) of the electrically conductive connecting element (6) and the second electrode (13) of the surge arrester (3) is thermally cut, and the isolating element i the solenoid (7) is displaced by the force of the spring member (s) to its second position, where a portion of the severing element (7) is disposed between the second end (11) of the electrically conductive connection (6) and the second electrode (13) of the surge diverter (3). 15
    [0002]
    Surge suppressor element according to Claim 1, characterized in that the isolating isolating element (7) has an opening (15) through which, in the normal state of the surge arrester element (1), the second end (11) of The electrically conductive connecting element (6) is electrically connected to the second electrode (13) of the surge arrester (3) via the thermal cut-off connection (12). 25
    [0003]
    Surge suppressor element according to Claim 2, characterized in that the insulating disconnecting element (7) has a breaking segment (16) extending perpendicular to the direction of movement of the disconnecting element (7) and an insulation segment (17) extending parallel to the direction of movement of the severing element (7).
    [0004]
    Surge suppressor element according to one of Claims 1 to 3, characterized in that the gas-filled surge arrester (3) is disc-shaped and is arranged in the casing (2) in such a way that the extension the overvoltage splitter (3) from the first electrode (9) to the second electrode (13) is perpendicular to the longitudinal extension (L) of the surge arrester element (1).
    [0005]
    Surge suppressor element according to one of Claims 1 to 4, characterized in that the two electrodes (9, 13) of the gas-filled surge arrester (3) are each connected electrically to a connection element (18). , 19).
    [0006]
    Surge suppressor element according to claim 5, characterized in that the first electrode (9) of the surge arrester filled with gas (3) and the first connection element (18) are made in one piece.
    [0007]
    Surge suppressor element according to Claim 5 or 6, characterized in that the connecting element (19) connected to the second electrode (13) of the gas-filled surge arrester (3) has a spaced junction zone (20). of the surface of the surge diverter (3), so that in normal state of the surge arrester element (1), the second end (11) of the electrically conductive connecting element (6) is connected to the zone junction (20) by the link (12) thermal cut, without the connecting element (6) is substantially deviated from its rest position.
    [0008]
    Surge suppressor element according to one of Claims 1 to 7, characterized in that the insulating disconnecting element (7) has two differently colored markings (21, 22) arranged side by side, serving as optical indicator of state for the surge arrester element (1).
    [0009]
    Surge suppressor element according to one of claims 1 to 8, characterized in that an outer housing (23) in the form of a hood is provided, which is engaged with the housing (2).
    [0010]
    10. Surge suppressor element according to claims 8 and 9, characterized in that an observation aperture (24) is provided in the outer casing (23), which is dimensioned so as to make visible from the outside (7). ) than one of the two color marks (21, 22) through the observation aperture (24), depending on the position of the insulating severing element.
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    同族专利:
    公开号 | 公开日
    FR3023988B3|2016-07-22|
    DE202014103262U1|2014-07-30|
    CN205140660U|2016-04-06|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE4241311C2|1992-12-08|1995-06-08|Phoenix Contact Gmbh & Co|Temperature switch with a block housing|
    FR2727806B1|1994-12-05|1997-02-28|EP3417470A4|2016-02-15|2020-04-01|Dongguang Littlefuse Electronics Co., Ltd.|Thermal metal oxide varistor circuit protection device|
    DE102016119202B4|2016-10-10|2019-12-05|Phoenix Contact Gmbh & Co. Kg|Snubber|
    CN106786465B|2017-01-19|2018-09-21|深圳市海鹏信电子股份有限公司|Surge protector|
    DE102017208571A1|2017-05-19|2018-11-22|Phoenix Contact Gmbh & Co. Kg|Separating unit for a varistor|
    DE102017112429B4|2017-06-06|2019-07-18|Phoenix Contact Gmbh & Co. Kg|Snubber|
    DE102018114564A1|2018-06-18|2019-12-19|Dehn Se + Co Kg|Disconnect device for a surge arrester|
    DE202018006119U1|2018-06-18|2019-04-11|Dehn + Söhne Gmbh + Co. Kg|Separating device for a surge arrester|
    DE102018116208A1|2018-07-04|2020-01-09|Phoenix Contact Gmbh & Co. Kg|Surge protection device|
    DE102019123354B4|2019-08-30|2021-03-25|Phoenix Contact Gmbh & Co. Kg|Surge protection module and process for its manufacture|
    法律状态:
    2016-07-11| PLFP| Fee payment|Year of fee payment: 2 |
    2017-07-27| PLFP| Fee payment|Year of fee payment: 3 |
    2018-07-26| PLFP| Fee payment|Year of fee payment: 4 |
    2019-07-29| PLFP| Fee payment|Year of fee payment: 5 |
    2020-07-28| PLFP| Fee payment|Year of fee payment: 6 |
    2021-07-26| PLFP| Fee payment|Year of fee payment: 7 |
    优先权:
    申请号 | 申请日 | 专利标题
    DE201420103262|DE202014103262U1|2014-07-15|2014-07-15|Snubber|
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