CN100539342C - Overvoltage side-discharging device - Google Patents
Overvoltage side-discharging device Download PDFInfo
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- CN100539342C CN100539342C CNB2005800134109A CN200580013410A CN100539342C CN 100539342 C CN100539342 C CN 100539342C CN B2005800134109 A CNB2005800134109 A CN B2005800134109A CN 200580013410 A CN200580013410 A CN 200580013410A CN 100539342 C CN100539342 C CN 100539342C
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- switch
- overvoltage limiting
- overvoltage
- limiting element
- switch block
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Abstract
The invention relates to a device for overvoltage bypass, comprising one or several overvoltage limiting elements (such as varistors, diodes or the like) which are arranged in parallel in a structural unit, at least one switching element for electrically disconnecting the overvoltage limiting elements in the event of a thermal overload of the elements, and means for displaying and/or indicating a given error state. According to the invention, a first switching component is provided which is in thermal contact with the overvoltage limiting element and which activates or triggers an optical display upon reaching a first temperature limit value (T1) to indicate a limited use or service life limit of the overvoltage limiting element. A second switching element is also provided, which is in thermal contact with the overvoltage limiting element. The components effect power disconnection and error status display in a known manner.
Description
Technical field
The present invention relates to the other device of letting out of a kind of overvoltage, preamble as claimed in claim 1 is described, described overvoltage is other let out device comprise one or more be arranged in parallel overvoltage Limiting element (as rheostat, diode or analog) in construction unit, as described in during overvoltage Limiting element thermal overload electric power separate their at least one switch block and be used to show and/or indicate the parts of the error condition of appearance subsequently.
Background technology
Comprise that the rheostatic overvoltage protection that holds in the enclosure is known; for example as can be known by German utility model 9305796U; thermoswitch is set in the current path between power line and the rheostat by the pad of opening under spring action when rheostat is overheated; and for this purpose, one of them contact of pad is positioned at along opening on the contact frame of direction loading spring power.This device also allows to be higher than the impulse current that increases of nominal discharge current, with rheostatic the closing of realizing being provided.For this purpose, in the path of contact frame, provide a predetermined breakpoint, its cross section and thereby the mechanical modulus of section be less than the cross section of contact frame on all the other paths.The electric power that corresponding high impulse current causes is with respect to the horizontal effect of the sense of current, and therefore with respect to the portraitlandscape effect of contact frame.Therefore this just causes the fracture of contact frame at the predetermined breakpoint place.
Letting out in the device triggering separating component that a plurality of overvoltage Limiting elements (for example rheostat or diode) is set and for example leaks according to the overvoltage of DE4124321C2 is other based on overheated or definite electric current.In order to improve the reliability of this device; particularly in order to construct them redundantly; thereby when one of them in described overvoltage Limiting element breaks down; can utilize other overvoltage Limiting element to work on; can guarantee simultaneously that by this overvoltage Limiting element fault and overheated effectively separates; two overvoltage Limiting elements are provided at least, wherein said size of component enough greatly so that each element is guaranteed the overvoltage protection in the relevant work position.This solution also provides the thermo-fuse of the current path that is arranged in the first overvoltage Limiting element, and it is based on crossing the thermal release first overvoltage Limiting element and connecting second overvoltage Limiting element.
According to EP0716493B1, the prior art comprises that one has at least two rheostatic devices to prevent the generation of transient overvoltage, this device comprises the separating component to above-mentioned rheostatic state sensitivity, and described separating component separates rheostat respectively when rheostatic working life finishes.The mechanical part of visual rheostat state is provided in addition, these rheostats be functionally connected to separating component with by its actuating.
Whether the machinery visualization element is used to distinguish two rheostats in work, and whether one of them is separated, and perhaps whether two rheostats all are in released state.This machinery visualization element also has a slide block, and it is activated by the rheostatic separation guider that is installed in parallel.
Known thermal release parts are based on the solder joint effect, and described solder joint electric power when terminate the useful life of overvoltage discharger or when active component transships separates, and activate demonstration or indicating device a light and/or electricity directly or indirectly.
As mentioned above, the varistor disks that provides one to have the thermal release parts is provided prior art, and two varistor disks that have separating component respectively perhaps are provided, to separate corresponding varistor disks and open second varistor disks under overload condition.A shortcoming of this known arrangement is that the separation of the thermal release parts that carry out based on fault/overload means that corresponding component is separated from electric power system.Though this has been avoided further damaging subsequently, overvoltage protection is just no longer worked or only limited work.
Summary of the invention
In view of the above, task of the present invention is to provide a kind of overvoltage that further develops the other device of letting out, it comprises one or more overvoltage Limiting elements (as rheostat, diode or analog) that are arranged in parallel in construction unit, this device comprises at least one switch block by this, is used under the situation of described overvoltage Limiting element thermal overload electric power and separates described element and show or indicate corresponding state.Like this, the imminent overload of corresponding overvoltage protection (for example causing with the aging of temperature correlation or to the repeated impacts voltage of effective parts by the varistor disks that works) will be discerned in time.For this purpose, described device will be configured to, and work display in useful life is set as accurate early warning level.Also need in addition to regulate and control described early warning level, thereby for this display provides or provide enough intervals, to reflect from only limited remaining life until the damage that can not the repair state of (thereby parts finally must separate from power supply).
Task of the present invention solves by a device that has according to the assemblage characteristic of claim 1, and wherein dependent claims constitutes functional at least embodiment and further improves.
Device according to the present invention allows each parts at the ageing state of its corresponding working position and thereby remaining life is shown, assessment and long-range transmission signal.
At the General Maintenance duration of work, the side damaged of the initial stage that is identified as is let out device and can be replaced, and need not to move simultaneously the system that does not have overvoltage protection or the overvoltage protection of minimizing is only arranged when so doing.
Different with prior art solutions, whole discharge capabilities remain unchanged; That is to say that the impulse current load capacity continues the end until Acceptable life.In other words, even provide a plurality of rheostat paths, under the situation of early warning, do not have any path yet and separate from power supply.Therefore this has just improved by the Global Macros degree that system provided of being furnished with according to device of the present invention.
According to the present invention, first switch block with overvoltage Limiting element thermo-contact is provided, so that just activate or trigger an optical display in case reach the first temperature extremes value T1, thereby show practicality of above-mentioned edge or the useful life that reaches the overvoltage Limiting element.
Second switch parts with the thermo-contact of overvoltage Limiting element also are provided,, just realize in a manner known way that electric power separates and the error condition demonstration so that in case reach the second temperature extremes value T2 (T2〉T1).
In one embodiment of the invention, first switch block is functionally connected to long distance communication contact, so that limited residue Acceptable life or detected abnormality are transferred into a service centre.
In one embodiment of the invention, first and second switch blocks and separately a slide block or common slide block mechanical connection, and act on respectively on such slide block, wherein said slide block is positioned on the end face of construction unit and the switch block that correspondingly activates by response vertically moves, and exposes the visual field colored or coloud coding.
In conjunction with so far, the notion that is used for the Acceptable life display of overvoltage protection is preferably realized by one three grades, color optical display.For example; the Show Color of " green " may be corresponding to the other device of letting out of a global function overvoltage; the Show Color of " yellow " may indicate a prestrain/aging side to let out device, and the Show Color of " redness " may be indicated the protection module of an overload, separation.The latter then need be replaced, and by this, as mentioned above, lets out the device level by the long distance communication contact that is provided has been damaged based on the accurate initial stage and activated.
First switch block of the present invention can be constructed to have the element of the variable optical characteristic that responds thermal effect, for example so-called thermocolour film.
According to one embodiment of present invention, switch block is included in the spring-loaded lever element of primary importance, and wherein said primary importance is fixed by fusible wiring, wax, thermoplastic or similar material.The fusing point that is used for the material of this first switch block is selected as being lower than the fusing point of second switch parts.
In an optional embodiment, switch block has by the lever element of at least one springs preload, wherein the primary importance of first switch block is fixed by a thermal shrinkage pipe material, make the change in location that corresponding lever element takes place by the contraction of tubing up to the heat load of temperature extremes value T1 the time, carry out optical signalling simultaneously and send.
When conceptive formation is of the present invention, can select the difference between temperature extremes value T1 and the T2, make it can be specially adapted for corresponding demand for security.
The constructional variant that overvolatge device is let out on the side has two varistor disks that are arranged in the construction unit, as with parallel interval overvoltage Limiting element adjacent one another are.
Switch block herein preferably is arranged on the separating part between the varistor disks, wherein rheostatic contact disc or contact plate and switch block thermo-contact separately.
Description of drawings
With embodiment the present invention is described in more detail below with reference to accompanying drawings.
Wherein:
Fig. 1 is the basic circuit diagram according to device of the present invention, and this device comprises the Acceptable life monitor;
Fig. 2 is first technology implementation example of described device;
Fig. 3 is second embodiment according to device of the present invention;
Fig. 4 is an embodiment who has as the device of the heat-shrink tube of first switch block according to the present invention;
Fig. 5 is the embodiment of first switch block of on-mechanical effect, and indicator for displaying color change or based on the color change of heat load;
Fig. 6 is the perspective view of a rheostat module, and this rheostat module has two varistor disks, described varistor disks with place the device of switch block therebetween to be connected in parallel;
Fig. 7 illustrates the operation of the switch block of first mechanical realization that is used for the display in useful life; And
Fig. 8 illustrates d/d first switch block and the color change from the yellow to the redness in the variable resistor unit that electric power of figure bottom separates.
Embodiment
According to an embodiment, as shown in Figure 1, overvoltage protection comprises the display unit 2 an and separator 3 in useful life of a rheostat module and an integral body, and described rheostat module has two plate-like rheostats 1 that are connected in parallel.
The temperature of display in useful life 2 (level S1) assessment variable resistor unit 1 shows video from green conversion extremely yellow (referring to Fig. 7), and activate remote communication signal FM when the temperature extremes value T1 that limits is exceeded.
The technology of display must be noted that during realizing in useful life, is configured to the contact disc of variable resistor unit with the optimization of maximum heat flux density, and this selectivity heating for various parts (preferred fusible wiring) by the temperature decision is necessary.
Except using fusible wiring, can use other temperature optionally wax, plastics, heat-shrink tube or other similar material equally.
Thermal release device (among Fig. 1 level S2) separates variable resistor unit 1 and converts visual display to redness (referring to Fig. 8) from yellow at critical temperature T2 (T2〉T1).
Necessary between the triggering of accurate early warning and thermal release device can be set at by the selectivity temperature rank of employed sensitive component at interval one dispatch from the factory or wide region that the user is specific in.
According to first embodiment of apparatus of the present invention of reference Fig. 2, the first temperature survey point T1 (Reference numeral 4) connects (referring to Fig. 6) by for example soft soldering between the contact-making surface and is connected to switch element S1 (Reference numeral 5).The first temperature survey point T1 is moved when being triggered by preloaded spring 6, so that signal lever 7 triggers warning level 8 and the remote communication signal of being represented by slide block, thereby video board is changed to yellow from green.
When surpassing critical temperature T2 in zone 9, switch S 2 (Reference numeral 10) activated, and this is just finally from the power supply separative element.Switch S 2 moves again and shows slide block 8a, to send " redness " signal in the video display.Described switch S 2 can be configured to a spring-loaded contact under suitable pretension.
According to the embodiment of the device of reference Fig. 3, be placed in the pre-stretching spring 6 in the sliding shoe guider and then be used for first switch block, described by this spring also holds a caster assembly therefor.When the soft soldering of zone in 4 connects fusing, under the effect of spring 6, signal lever 7 together with useful life display 8 move and cross a receiver (to the left side of figure), the zone of different color is exposed on the visible surface of construction unit as a result.
Among the embodiment according to Fig. 4, the heat-shrink tube 11 that is determined by temperature is used to indicate the early warning critical value that has reached under the temperature T 1.
When the adjustable critical value that reaches above the heat shrinkable pipe material parameter, the diameter of pipe reduces and mobile display element 12, thereby can clearly see early warning level 12a.
When surpassing temperature extremes value T2, then then to take place finally separating of whole parts with the fusible similar mode of effect that is connected thermo-fuse at point 13 places.
According to the modification of the solution of the embodiment of Fig. 5, the early warning level is sent to display device 14 by the color change of a temperature decision by signal.When reaching temperature T 1, for example variable color of thermochromic materials takes place in this case.When surpassing temperature T 2 in being welded to connect 13 zone, the associated switch parts just are triggered in a manner known way and realize that the system of parts separates.
Fig. 6 describes the sandwich style device of the rheostat module of the varistor disks (figure top) with two parallel connections.
Can find out that first and second switch blocks structurally are housed inside in the zone between the varistor disks from the bottom of figure.
This device allowable temperature reference point 4 contact with 9 optimal heat, and for example soft soldering connection accordingly of realization different melting points under the spring preload it on is with the primary importance of the lever element of floatless switch parts.
According to the top of Fig. 7, the rheostat module is in the global function state.According to the top of Fig. 8 and the bottom of Fig. 7, when meeting or exceeding first temperature T 1,4 realize separation process in the zone.Owing to the preload of spring 6, lever 7 drives slide blocks 15 and together moves to a figure left side in view of the above.Therefore, the cover plate 16 of construction unit experiences color change on according to bottom video board shown in Figure 7.
When the thermo-fuse in the toggle area 9, and then the variation of color takes place, for example from yellow to red (Fig. 8, bottom), just known clearly failure of apparatus by this and must change module.
Claims (8)
1. one kind is used for the other device of letting out of overvoltage, comprises one or more overvoltage Limiting elements that are arranged in parallel in a construction unit; When described overvoltage Limiting element thermal overload, be used at least one switch block that electric power separates described overvoltage Limiting element; And the device that is used to show and/or indicate the error condition that occurs subsequently,
It is characterized in that:
One first switch block is configured to and the thermo-contact of described overvoltage Limiting element, when reaching the first temperature extremes value (T1), described first switch block activates or triggers an optical display, the edge practicality or the useful life of overvoltage Limiting element have been reached with expression, second switch parts with the thermo-contact of described overvoltage Limiting element also are set, when reaching the second temperature extremes value (T2), described second switch parts realize that electric power separates and error condition shows that the wherein said second temperature extremes value (T2) is greater than the described first temperature extremes value (T1).
2. according to the described device of claim 1, it is characterized in that: described first switch block is connected with a telecommunication contact.
3. according to claim 1 or 2 described devices, it is characterized in that: each of described first and second switch blocks mechanically is connected with corresponding slide block, wherein said slide block is positioned on the end face of described construction unit, and the switch block that correspondingly activates by response vertically moves, and exposes the visual field colored or coloud coding on described end face.
4. according to claim 1 or 2 described devices, it is characterized in that: described first switch block is the device with variable optical characteristic of response thermal effect.
5. according to claim 1 or 2 described devices, it is characterized in that: described first and second switch blocks are included in the lever element that primary importance spring-loaded ground is provided with, wherein said primary importance is fixed by fusible wiring, wax, thermoplastic or similar material, and the fusing point that is used for the described material of first switch block is selected as being lower than the fusing point of the material of described second switch parts.
6. according to claim 1 or 2 described devices, it is characterized in that: described first and second switch blocks comprise by the lever element of at least one springs preload, wherein the primary importance of first switch block is fixed by a thermal shrinkage pipe material, make the change in location that corresponding lever element takes place by the contraction of tubing up to the heat load of the first temperature extremes value (T1) time, carry out optical signalling simultaneously and send.
7. according to claim 1 or 2 described devices, it is characterized in that: select the difference between the first temperature extremes value (T1) and the second temperature extremes value (T2), make to be applicable to corresponding demand for security.
8. according to claim 1 or 2 described devices, it is characterized in that: two varistor disks are set at the interior conduct of the construction unit overvoltage Limiting element of parallel interval adjacent to each other, wherein said first and second switch blocks are set on the separating part between described two varistor disks, and contact disc or contact plate and the thermo-contact of respective switch parts are being connected described two varistor disks, but wherein electromagnetic force is neutralized and big impulse current value Be Controlled.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102004016377.4 | 2004-04-02 | ||
| DE102004016377 | 2004-04-02 | ||
| DE102004024657.2 | 2004-05-18 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1947317A CN1947317A (en) | 2007-04-11 |
| CN100539342C true CN100539342C (en) | 2009-09-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005800134109A Expired - Fee Related CN100539342C (en) | 2004-04-02 | 2005-03-30 | Overvoltage side-discharging device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100539342C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102008031917B4 (en) * | 2008-07-08 | 2017-06-22 | Phoenix Contact Gmbh & Co. Kg | Snubber |
| DE102008048644B4 (en) * | 2008-08-01 | 2017-08-24 | DEHN + SÖHNE GmbH + Co. KG. | Overvoltage protection device with one or more parallel-connected, located in a structural unit overvoltage limiting elements |
| DE102010007428A1 (en) * | 2010-02-09 | 2011-08-11 | Phoenix Contact GmbH & Co. KG, 32825 | Snubber |
| US9570260B2 (en) | 2011-06-17 | 2017-02-14 | Littelfuse, Inc. | Thermal metal oxide varistor circuit protection device |
| SI2812962T1 (en) * | 2012-02-08 | 2016-07-29 | Obo Bettermann Gmbh & Co. Kg | Surge arrester |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB690495A (en) * | 1950-06-15 | 1953-04-22 | Bernard Andre Vuille | Improvements in indicating devices for remotely controlled electrical apparatus |
| EP0716493A1 (en) * | 1994-12-05 | 1996-06-12 | Soule Materiel Electrique | Transient overvoltage protection device with varistors and thermal disconnectors |
| US5574614A (en) * | 1994-10-01 | 1996-11-12 | Krone Aktiengesellschaft | Protection plug |
| CN1207600A (en) * | 1993-06-09 | 1999-02-10 | 欧奈克公司 | Telephone line overvoltage protection apparatus |
| EP1022837A2 (en) * | 1999-01-22 | 2000-07-26 | Zymax International Limited | Surge protector |
| CN2439134Y (en) * | 2000-07-18 | 2001-07-11 | 深圳市华为电气技术有限公司 | Overvoltage protector for main distributing frame protecting unit |
-
2005
- 2005-03-30 CN CNB2005800134109A patent/CN100539342C/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB690495A (en) * | 1950-06-15 | 1953-04-22 | Bernard Andre Vuille | Improvements in indicating devices for remotely controlled electrical apparatus |
| CN1207600A (en) * | 1993-06-09 | 1999-02-10 | 欧奈克公司 | Telephone line overvoltage protection apparatus |
| US5574614A (en) * | 1994-10-01 | 1996-11-12 | Krone Aktiengesellschaft | Protection plug |
| EP0716493A1 (en) * | 1994-12-05 | 1996-06-12 | Soule Materiel Electrique | Transient overvoltage protection device with varistors and thermal disconnectors |
| EP1022837A2 (en) * | 1999-01-22 | 2000-07-26 | Zymax International Limited | Surge protector |
| CN2439134Y (en) * | 2000-07-18 | 2001-07-11 | 深圳市华为电气技术有限公司 | Overvoltage protector for main distributing frame protecting unit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1947317A (en) | 2007-04-11 |
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