EP2074686A1 - Ensemble d'éclateurs pour tensions assignées supérieures - Google Patents
Ensemble d'éclateurs pour tensions assignées supérieuresInfo
- Publication number
- EP2074686A1 EP2074686A1 EP08831279A EP08831279A EP2074686A1 EP 2074686 A1 EP2074686 A1 EP 2074686A1 EP 08831279 A EP08831279 A EP 08831279A EP 08831279 A EP08831279 A EP 08831279A EP 2074686 A1 EP2074686 A1 EP 2074686A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- spark gap
- spark
- arrangement according
- gap arrangement
- insert
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000000463 material Substances 0.000 claims abstract description 21
- 238000009413 insulation Methods 0.000 claims description 12
- 230000007704 transition Effects 0.000 claims description 4
- 238000002485 combustion reaction Methods 0.000 claims description 2
- 230000001960 triggered effect Effects 0.000 abstract description 6
- 230000003247 decreasing effect Effects 0.000 abstract description 3
- 239000002775 capsule Substances 0.000 abstract 1
- 125000006850 spacer group Chemical group 0.000 description 29
- 230000036961 partial effect Effects 0.000 description 8
- 230000004044 response Effects 0.000 description 8
- 239000007789 gas Substances 0.000 description 6
- 238000002955 isolation Methods 0.000 description 6
- 230000035882 stress Effects 0.000 description 6
- 238000005538 encapsulation Methods 0.000 description 5
- 238000000926 separation method Methods 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 230000032683 aging Effects 0.000 description 2
- 238000007596 consolidation process Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- 230000000670 limiting effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000002829 reductive effect Effects 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 230000000306 recurrent effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
- H01T4/00—Overvoltage arresters using spark gaps
- H01T4/16—Overvoltage arresters using spark gaps having a plurality of gaps arranged in series
Definitions
- the invention relates to a spark gap arrangement for higher rated voltages, wherein at least two, opposite electrodes having spark gaps are connected in series and at least one of the spark gaps active, d.
- a series circuit of two spark gaps for the limitation of surges in low-voltage systems, consisting of three electrodes, wherein for the creation of each spark gap two of these electrodes are each opposite to a surface and are held apart by an insulating layer from each other, is known from DE 39 14 624 C2 previously known.
- the local spark gaps have a very different inherent capacity, whereby the response voltage of the overall arrangement is determined essentially by the spark gap with the smaller capacity.
- a spark arrestor overvoltage protection element with at least two main electrodes located in a pressure-tight housing and an auxiliary starting electrode is previously known, wherein a functional subassembly for reducing the response voltage is accommodated in the housing volume.
- This functional module comprises a series connection of a voltage-switching element, an impedance and an isolating distance, so that a simplified, quasi-integrated starting aid is created.
- spark gaps are used, which are located in a flameproof enclosure and which have at least one pressure equalization opening. Furthermore, the distance between the main electrodes of the passive spark gap bridging insert is provided, which consists of a low-resistance material. This material behaves strongly under current load with respect to the decreasing residual voltage nonlinear.
- the series connection is formed from two physically separated spark gaps, one of the spark gaps being triggerable and the second spark gap being passive.
- the spark gaps are accommodated in a common, pressure-resistant, preferably metallic housing.
- the spark gaps preferably used are rotationally symmetrical.
- the respective opposing main electrodes comprise a main electrode with Gasumlenkkanal.
- the bridging, low-impedance insert already mentioned is arranged as a preferably rotationally symmetrical part with a cylindrical opening delimiting the arc combustion chamber.
- the main electrode opposite the main electrode with the gas deflection channel has a nose portion or a projection which dips into the cylindrical opening, with the wall coming into contact with it. It is understood that the nose portion is to be formed in its outer contour complementary to the shape of the cylindrical opening.
- the low-resistance material of the insert preferably has a cold resistance of ⁇ 100 ohms.
- the insert has in one embodiment, a hollow cylindrical shape and is located with one end face over the entire surface of the main electrode with Gasumlenkkanal.
- the preferably hollow-cylindrical insert in each case with one of its end faces, is in contact with one main electrode in each case over its entire surface.
- the flashover between the main electrodes takes place only after a comparatively longer period of time or at very high pulse currents, which is particularly of interest when the residual voltage of the spark gap is to be above the nominal voltage at a plurality of pulse-shaped discharges to prevent a Netz Steinstrom ,
- the clear distance between the respective main electrodes of the spark gaps is substantially greater than that which can be found in the known state of the art in corresponding series circuits, and is at least about 5 mm.
- the pressure equalization openings are basically oriented in the axial direction of the rotationally symmetric spark gaps and are away from one another in order to prevent unwanted exposure of functionally important parts.
- a transition part may be provided which has a higher resistance value relative to the insert, but is conductive.
- the geometric shape of the insert can be subjected to changes in the radial and / or axial direction for adjusting and varying the current density, so that in the preferred rotationally symmetrical basic construction and a desired modular structure by replacing the insert various electrical parameters can be realized.
- a common central main electrode is preferably provided, which in this case is insulated from the jacket encapsulation.
- the pressure compensation openings are designed axially and opposite in the region of the external contact of the respective main electrode as channels of small cross section for the slow pressure reduction of the already cooled gas.
- the external trigger circuit for igniting the active spark gap is guided on the trigger electrode of this active spark gap and on the electrical end connection points of the series connection.
- the necessary follow current limiting is achieved by increasing the arc field strength due to the pressure increase or in combination with the arc cooling by flowing the arc within encapsulated spark gaps.
- the distances between the main electrodes are at least 5 mm.
- the low-resistance material of the insert is located within the passive spark gap directly in the region of the arc channel and radially or completely limits the wall-stabilized arc.
- the material that bridges the distance between the main electrodes of the passive spark gap has a cold resistance of less than 100 ohms and behaves at current load with respect to the falling residual voltage is highly linear, ie the voltage drops despite further increasing current.
- the material used can momentarily pulse-shaped currents of several kA without lasting damage lead to overturning.
- the resulting residual voltage is well below 2 kV.
- the height and the duration of the residual stress can also be set or influenced by influencing the current density distribution in the material itself, by the geometric design of the insert or else by a functional subdivision from a plurality of materials.
- the inventive passive spark gap does not affect the response, coordination and residual voltage behavior of the entire series connection.
- the subdivision into partial spark gaps reduces the thermal and dynamic load on each single spark gap and there are many design options.
- the performance of the series-connected lightning arrester is improved in terms of follow current limiting, lightning current carrying capacity and aging.
- Compared to a series connection of two triggerable arresters there is the advantage that both space and costs for the second or multiple ignition units can be saved.
- a conventional series connection of triggerable spark gaps namely either a simultaneous ignition must be done, which makes high demands on the spark gaps, the trigger circuit and the potential control, or the trigger circuit must be able to compensate the Zündverzugs founded the individual spark gaps, since usually trigger circuits only one time and energy provide limited ignition pulse.
- FIG. 1 is a series circuit of a triggered spark gap and a passive, ungetriggered spark gap as discrete elements in each flameproof enclosure.
- FIG. 2 shows an exemplary geometry of a passive spark gap as used for the series connection according to the invention.
- Fig. 3 shows another embodiment of a geometry of a passive
- Fig. 5 exemplary embodiments of the insert or spacer.
- the Fig. 1 shows a series connection (sectional representation) of a triggered spark gap 1 (active spark gap) and an ungetriggered (passive) spark gap 2.
- the trigger circuit 3 of the active spark gap 1 has a connection 4 which is connected to a connection 5 of a main electrode 8 of the passive spark gap 2. Another connection of the trigger circuit 3 leads to the main electrode 8 of the active spark gap 1, which also has the trigger contact through an insulation 20, led out of the pressure-resistant metallic encapsulation 21.
- Pressure compensation openings 6 of the spark gaps 1 and 2 and the gas flow direction 7 (arrow) within the spark gaps 1 and 2 are oriented opposite.
- Both spark gaps 1 and 2 each have a plurality of independent ventilation openings 6 for better control of the flow and for effective cooling of the gases formed during ignition and firing of the arc.
- one of the main electrodes 8 has an opening 22, which forms part of a Gasumlenkkanals, which merges into the pressure equalization openings 6.
- the triggerable spark gap 1 has two main electrodes, namely the main electrode 8 and 9, as well as a H ilfselde 10, which is in electrical connection with the trigger contact 20.
- the spark gap 1 has at least one insulation gap 12, which is located between the main electrodes 8 and 9 of this spark gap.
- the passive spark gap 2 also has two main electrodes 8 and 9.
- a trained as a spacer 13 insert between the main electrodes 8 and 9 of the passive spark gap is preferably made in one piece from a very low-resistance material.
- da 15 mm
- di 5 mm
- the spacer 13 is preferably designed as a hollow cylinder and is according to the illustration of FIG. 1 with one of its end faces over the entire surface on the main electrode 8.
- d. H. the existing there cylindrical opening protrudes a nose portion 23 of the main electrode 9, whereby a radial contact with the insert or the spacer 13 results.
- the spacer 13 is insulated therefrom by the part 15.
- the immersion depth of the nose portion 23 of the electrode 9 in the spacer 13 increases with the desired level of performance of the arrester and decreases with increasing erosion resistance of the electrode material.
- the immersion depth is in this case dimensioned such that both the axial burnup of the nose electrode 9 and the radial erosion of the spacer 13 do not lead to an insulating separation path between the parts 13 and 9.
- the height and duration of the current through the spacer 13 as well as the rollover behavior can be influenced by the control of the current density and the current distribution in the spacer 13 in addition to the material properties of this part. In addition to influencing the residual stress, this can also be used to control the power conversion, the burnup and the thermal load on the spark gap and in particular of the insert 13.
- the main electrodes 8 and 9 of the passive spark gap 2 can be completely or partially isolated from the spacer 13. The partial isolation serves to control the current transition region to affect the current density distribution and the flashover speed.
- the complete isolation of the electrodes 8 and 9 with respect to the spacer 13 serves the same purpose, d. H. the concentration of the current density in the preferred flashover area, in particular in the inner tube of the spacer.
- a spark generation is realized during the overturning of the insulation gap, which causes ionization, whereby the flashover is promoted.
- the isolation is designed so that the Breakover voltage does not affect the response voltage and residual voltage of the spark gap.
- the flashover voltage is so low that when the mains voltage is applied, the passive spark gap would always respond without series connection with the triggerable spark gap. Thus, this is virtually controlled and permanently loaded with electricity to burn. It follows that after ignition of the triggerable spark gap, the passive spark gap itself only at mains voltage current. The insulation is thus virtually absent and it ignites the passive spark gap with insulated electrodes as well due to the immediate current flow as well as without isolation. The function is identical to this. Only the current density distribution and the ionization lead to a rapid ignition of the main line of the passive spark gap.
- the Fig. 2 shows an exemplary geometry as a cross-sectional representation for a passive spark gap. Again, two opposite main electrodes 8 and 9 are present. The electrodes are isolated in a metallic enclosure 21 located.
- the main electrodes 8 and 9 shown can also be isolated from the insert 13, but the breakdown voltage of the insulation must be well below the desired protection level and below the residual voltage of the trigger circuit.
- the spacer 13 can also be varied in the circumference of the hollow cylinder in both the radial and in the axial direction with respect to the electrical conductivity. In this way, in addition to the control of the electric current density in the spacer 13 and effects of thermal insulation with respect to the electrodes 8 and 9 are effected. In addition, the Variation of the materials used in the discharge channel of the division of functions or used to influence the temperature and pressure resistance and the better aging quality and to reduce the burnup.
- FIG. 2 shows a substantially axial function distribution here.
- the two electrodes 8 and 9 in Fig. 1 only 9) with respect to the metallic encapsulation 21 isolated.
- the Fig. 3 shows another embodiment of a possible geometry in cross-sectional representation for the passive spark gap 2.
- a flashover between the main electrodes 8 and 9 should be done only at a comparatively long period of time or very high pulse currents.
- the spacer 13 is contacted over its entire surface at both end faces with the respective main electrodes 8 and 9 in order to bring about a largely homogeneous current density within the spacer 13.
- increases in the electric field strength, in particular in the rollover area can be avoided.
- FIG. 4 illustrates a basic embodiment of two spark gaps in a cross-sectional view, which are located within a common metallic encapsulation 21.
- Both spark gaps have a common center electrode 9, which is insulated from the flameproof enclosure 21. In the area of the passive spark gap 2, however, there is a low-resistance connection between the center electrode 9 and the main electrode 8 there. In contrast to the illustration of FIG. 1, in which at both spark gaps 1 and 2 In each case, the main electrode 8 is in direct contact with the metallic shell 21, at least in one of the spark gaps 1 and 2 as shown in FIG. 4, both main electrodes with respect to the jacket or the enclosure 21 is isolated.
- spark gap 1 this is the case with the passive spark gap 2.
- main electrodes 8 and 9 which are insulated with respect to the metallic encapsulation 21.
- the insulation of the main electrodes 8 and 9 is preferred over an insulating interruption of the pressure-resistant metallic shell 21 due to a better overload behavior.
- the spark gaps according to FIG. 4 have as well as in Fig. 1, opposite venting and pressure equalization openings or channels 6.
- the main electrodes each have at least a distance of substantially 5 mm in both spark gaps 1 and 2.
- the pressure in the discharge region, which is completely or partially enclosed by the insert 13, is up to several 100 bar in the case of impulse and subsequent static discharges. For prospective net sequence currents in the range of> 500 A to several kA, pressures of at least 10 bar are achieved.
- the illustrated series circuit of two spark gaps can basically be extended as desired.
- the series connection of a spark gap with insulation and a quasi-shorted spark gap has compared to two spark gaps, each with isolated separation distance per se the disadvantage that only one separation section provides an immediate consolidation after the current zero crossing.
- the instant solidification voltage is in the range of about 300 V.
- the danger of reignitions In order to be able to work with only one insulation distance, despite this disadvantage, the effect is used that the spark gaps used make use of the pressure increase that forms to delete the secondary current.
- the material of the spacer can be homogeneous, but also inhomogeneous. So z. B. a radially decreasing conductivity (Fig. 5a) can be realized. It is also possible to carry out a segmented conductivity in the periphery down to conductive webs (see Fig. 5b and 5c).
- the region 1 is a high-impedance region, while the region 2 is low-resistance. If the spacer 13 is made homogeneous, the current density can be determined or adjusted by the electrically conductive contact surface and the positioning of this contact surface.
- the contacts between the spacer 13 and the part 8 are reduced, for. B. by a smaller inner radius of the disc or the insulating film on the part 8, less current flows in the spacer 13 until the flashover, since the current density in the interior of the part 13 increases.
- FIG. 1 limited on the side of the nose electrode, the contact area between the parts 12 and 23 only to a limited height and the contact in the circumference, the current density increases in the inner tube region, ie in the discharge region of the spacer 13.
- a lower current density is z. B. achieved at the end-face support of the part 13 on the plate of the electrode holder 14.
Landscapes
- Spark Plugs (AREA)
- Breakers (AREA)
- Control Of Eletrric Generators (AREA)
- Prevention Of Electric Corrosion (AREA)
- Thermistors And Varistors (AREA)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102007049319 | 2007-10-15 | ||
DE102008049471A DE102008049471A1 (de) | 2007-10-15 | 2008-09-29 | Funkenstreckenanordnung für höhere Bemessungsspannungen |
PCT/EP2008/063757 WO2009050148A1 (fr) | 2007-10-15 | 2008-10-14 | Ensemble d'éclateurs pour tensions assignées supérieures |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2074686A1 true EP2074686A1 (fr) | 2009-07-01 |
EP2074686B1 EP2074686B1 (fr) | 2010-01-27 |
Family
ID=40340749
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08831279A Active EP2074686B1 (fr) | 2007-10-15 | 2008-10-14 | Ensemble d'éclateurs pour tensions assignées supérieures |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP2074686B1 (fr) |
AT (1) | ATE456875T1 (fr) |
DE (2) | DE102008049471A1 (fr) |
WO (1) | WO2009050148A1 (fr) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102016010102A1 (de) | 2016-08-24 | 2018-03-01 | Ingenieurbüro Spies GbR (vertretungsberechtigte Gesellschafter: Hans Spies, Martin Spies, 86558 Hohenwart) | Abtastender Optischer Abstandssensor |
DE102021208076B4 (de) * | 2021-07-27 | 2023-06-22 | Dehn Se | Überspannungsschutz-Funkenstreckenanordnung und Verfahren zum Betreiben einer Überspannungsschutz-Funkenstreckenanordnung |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL7316628A (nl) * | 1973-12-04 | 1975-06-06 | Coq Bv | Overspanningsafleider voor hoge spanning. |
SE458894B (sv) | 1987-09-04 | 1989-05-16 | Asea Ab | Anordning foer oeverspaenningsskydd |
DE3914624A1 (de) | 1989-05-03 | 1990-11-08 | Dehn & Soehne | Anordnung mit zumindest zwei funkenstrecken fuer die begrenzung von ueberspannungen |
DE4240138C2 (de) | 1992-11-28 | 1995-05-24 | Dehn & Soehne | Blitzstromtragfähige Anordnung mit zumindest zwei in Reihe geschalteten Funkenstrecken |
DE10230827A1 (de) | 2002-07-09 | 2004-02-05 | Obo Bettermann Gmbh & Co. Kg | Blitzstromtragfähige Funkenstrecke |
DE102004006988B4 (de) | 2003-11-28 | 2014-02-06 | Dehn + Söhne Gmbh + Co. Kg | Überspannungsschutzeinrichtung auf Funkenstreckenbasis, umfassend mindestens zwei in einem druckdichten Gehäuse befindliche Hauptelektroden |
DE102005024658B4 (de) | 2005-05-30 | 2007-02-15 | Dehn + Söhne Gmbh + Co. Kg | Gekapselte, druckfest ausgeführte, nicht hermetisch dichte, rotationssymmetrische Hochleistungsfunkenstrecke |
FI121765B (fi) | 2005-07-01 | 2011-03-31 | Alstom Grid Oy | Menetelmä ja sovitelma sarjakipinävälin liipaisemiseksi |
-
2008
- 2008-09-29 DE DE102008049471A patent/DE102008049471A1/de not_active Withdrawn
- 2008-10-14 WO PCT/EP2008/063757 patent/WO2009050148A1/fr active Application Filing
- 2008-10-14 EP EP08831279A patent/EP2074686B1/fr active Active
- 2008-10-14 AT AT08831279T patent/ATE456875T1/de active
- 2008-10-14 DE DE502008000350T patent/DE502008000350D1/de active Active
Non-Patent Citations (1)
Title |
---|
See references of WO2009050148A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE502008000350D1 (de) | 2010-03-18 |
EP2074686B1 (fr) | 2010-01-27 |
DE102008049471A1 (de) | 2009-11-12 |
WO2009050148A1 (fr) | 2009-04-23 |
ATE456875T1 (de) | 2010-02-15 |
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