EP1551048A1 - Dispositif limiteur de courant - Google Patents

Dispositif limiteur de courant Download PDF

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Publication number
EP1551048A1
EP1551048A1 EP04106992A EP04106992A EP1551048A1 EP 1551048 A1 EP1551048 A1 EP 1551048A1 EP 04106992 A EP04106992 A EP 04106992A EP 04106992 A EP04106992 A EP 04106992A EP 1551048 A1 EP1551048 A1 EP 1551048A1
Authority
EP
European Patent Office
Prior art keywords
arrangement according
plates
contact
quenching plates
arc
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.)
Withdrawn
Application number
EP04106992A
Other languages
German (de)
English (en)
Inventor
Wilfried Haas
Werner Hartmann
Norbert Wenzel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Siemens AG, Siemens Corp filed Critical Siemens AG
Publication of EP1551048A1 publication Critical patent/EP1551048A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66—Vacuum switches
    • H01H33/664—Contacts; Arc-extinguishing means, e.g. arcing rings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
    • H01H33/08—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
    • H01H33/10—Metal parts

Definitions

  • the invention relates to an arrangement for current limiting according to the preamble of claim 1.
  • Bei Such an arrangement for limiting the electrical Electricity in low-voltage networks, in case of operation at diffuse arc modes occur when the operating currents are flowing should in case of short circuit in the case of flowing Short-circuit currents of the arc through suitable cooling plates cooled or by suitable divider plates in a row lying partial arcs are split.
  • DE 199 13 236 C2 is in the individual embodiments explicitly on the spatial arrangement of the quenching plates, in particular cooling plates or divider plates, with respect to on position of contacts: Especially at the arrangements according to Figures 1 and 2 of DE 199 13 236 C2 are the identically shaped quenching plates in the axial direction of the Contact system stacked in parallel. So you are not staggered arranged so that the middle quenching plates in Contact gap proximity a huge distance to the contacts in transversal or radial direction and only the Close outer extinguishing plates close to the contact pieces.
  • the quenching plates are similar to the arrangement executed with spiral contacts, only that the two extreme extinguishing plates do not reach as far inside as the other quenching plates. It follows in the same way one Stacking of the quenching plates.
  • the inner edges of the thighs are or annular quenching plates as simple, smooth contours executed. More complicated, of air circuit breakers Her known geometric splitter structures, which are advantageous on the current-limiting formation of arc bases on the quenching plates are not applied.
  • quenching plate assemblies specifically cooling plates or dividing plates, for contacts in a current-limiting Specify vacuum interrupter, which the current-limiting Improve switching properties of the tube.
  • the individual quenching plates are advantageously not in the axial direction of the contact system parallel staggered or stacked, but are rather staggered in the direction of the switching pieces.
  • the quenching plates have a different immersion depth, the formed splitter stack with the edges the individual quenching plates a profile course accordingly the contact arrangement has. This is not enough only the outer Extinguishing plates close to the contacts, but show in particular, the middle quenching plates near the contact gap a small transverse or radial distance to the contacts.
  • the inner edges of the quenching plates lie that is, in a spatial band along the divergent contact segments.
  • the tape can be parallel to the contacts run. This is particularly important if the Contacts are beaked or rotationally shaped.
  • the staggered quenching plates are advantageously shaped so that the arc facing Edge deviates from a straight or circular contour.
  • the border contour can be regular, for example, serrated, or irregular.
  • the contours are preferably on the Slits adjusted.
  • vacuum interrupters be used with such contact configurations, the Although lean on the known structure. According to the invention however, improve the staggered arc splitter assemblies through the geometric changes the current limit and so the switching behavior of the vacuum switch crucial.
  • the invention was an analysis of the current limiting behavior in DE 199 13 236 C2 basis, resulting in some new knowledge led. It was recognized that the location of the Blade inside edges according to Figure 4 of DE 199 13 236 C2 neither an extension of the predominantly axial, one-piece arc filament before entering the quenching plates in the radial direction enforces the cooling effect the quenching plates by extending the contact zone Arc quenching favors. Both are unfavorable for the formation of arc bases on the Extinguishing plates, because of low arc length and poor cooling a low arc voltage requirement before entering into condition the quenching plates.
  • FIGS. 1 and 2 thus show an arrangement which is in contact with itself those used in conventional low-voltage circuit breakers Air switching chambers based, with suitable materials be used for vacuum conditions. This arrangement shows a good current-limiting at high short-circuit currents Behavior. A stationary in the field of divider plates however, a burning arc of several 10 kA may occur the divider plates and the outer, from the arc contaminated contact area destroy and therefore not sufficient Allow life.
  • FIG. 3 and Figure 4 is in each case the improved arc splitter arrangement shown.
  • the switch assembly 1 to 4 with the beak-shaped contact carriers 4 and the contacts. 9 corresponds to the figure 1 or 2.
  • Now shown is a Arrangement of quenching plates 36a to 36i, in which the individual Extinguishing plates have a different lateral extent. While the individual quenching plates on the right side ending flush and in a not shown in the figure 3 Holder made of electrically insulating, non-gaseous material are attached, they are on the opposite side different lengths.
  • the complete splitter stack 36 forms on this page in total approximately a triangular profile.
  • the switching pin consists of OFHC copper, where the actual contact pieces 9 made of contact material, For example, CuCr50, are arranged.
  • the individual quenching plates of the splitter stack with predetermined End profile consist of iron, steel or copper, in particular OFHC copper.
  • iron is possibly also a specific one Steel, is magnetizable, whereby the running of the Arc is favored in the splitter stack.
  • specially Iron is galvanically nickel plated to prevent corrosion.
  • FIGS. 6 and 7, 11 and 12 denote two contact pins for power supply, one of which via a not shown Federbalg is designed to be movable. Also the real one Vacuum interrupter is not shown in detail.
  • Between laterally beveled contacts 13 and 14 is an arrangement 15 present, in detail from individual divider plates 16a to 16h and associated ceramic or metal parts.
  • the divider plates 16a to 16h end introduced into a ceramic holder 17 and is according to FIG. 6 shows at least one radial slot 18.
  • the switching pieces 13 and 14 have in their layout similarities with spiral contacts used in vacuum switching technology.
  • the magnetic force acting on the intense arc created between the separating contact pads has components that drive the arc toward the race.
  • an extension of the arc is achieved by chamfering the contact pieces.
  • the arc will go into the diffuse mode and thereby extend over the entire contact piece surface, if a dependent of the contact piece diameter D limiting current of I G ⁇ 15 - 25 kA is not exceeded.
  • D limiting current of I G ⁇ 15 - 25 kA is not exceeded.
  • the arc is maintained in contracted mode, and its voltage requirement during wandering as a result of the extension increases to a few 100 V and thus the current limitation becomes effective.
  • the voltage requirement of a long arc at least for the repeatedly occurring unstable arc configurations will be greater than the sum of the voltage requirement of partial arcs, which burn between two divider plates or between a raceway and a divider plate.
  • the commutation of the long arc into the area of the divider plates and its division occurs within a few ⁇ s.
  • the burning voltage and the associated current limit are only slightly reduced. Only when the instantaneous current falls below the limit value I G before zero current, does the arc withdraw from the splitter plate region and change to the diffuse mode. It spreads over the contact surface and the arc voltage decreases with decreasing current.
  • the direction of the resulting between the divider plates contracted arcs is determined by the local magnetic field, that of the current flow in the switching pieces or Running rings and the divider plates depends. She can therefore for the individual sheets, as with reference to FIGS. 7 and 9 for a section of the divider plates and races shown will be, different.
  • the arc Since the current-limiting effect of a shutdown as possible should use quickly and immediately with the arc voltage build-up related, the arc must be fast migrate from the contact pads in the direction of the divider plates. In addition, the commutation must be in the range of the divider plates be done quickly, so that reignitions in the back of Arch and thus arc voltage dips are avoided.
  • FIGS. 8 and 9 show improvements of the staggered ones Fire extinguishers specially designed for axial symmetry.
  • a splitter stack 86 with staggered inside Extinguishing plates 86a to 86i and other extinguishing plates 86j to 861 shown. All quenching plates 86a to 861 are attached at the rear in an insulating assembly 87, the can be the wall of the vacuum interrupter at the same time. at this arrangement are related to the contact arrangement axially symmetric quenching plates before.
  • the well-known vacuum interrupter with current-limiting property thus consists of at least two contacts with measures for generating radially directed magnetic fields, of which at least one contact in the direction of the power supply From the other contact is movable, from one vacuum-tight envelope, an insulator and an electric largely isolated mounted, the main contacts enclosing Splitter stack for arc splitting.
  • the staggered arranged and / or shaped quenching plates bring considerable technical improvements: the one from the place of origin arc running away reaches the middle fireplaces immediately after contact separation.
  • the cooling Effect of the middle quenching plates is therefore without delay, as well as a possible formation of partial arcs, at least in the middle splitter columns.
  • the current limit due to increased arc tension thus occurs advantageous early in case of overload.
  • the location of the sheet-metal edges subjected to the arc forces an extension of the arc filament before or instead of a division through the quenching plates in transversal or radial direction. In particular, it causes a better one Cool the arc through the long contact zone between Arc and quenching plates.
  • the associated increased arc voltage requirement before entering the splitter plate column favors the formation of arc bases the quenching plates.
  • the specified geometric measures thus have an advantageous effect on the structure of increased arc voltage amplitudes out.
  • the shapes of the quenching plates described can also be advantageous be further educated. On the one hand, a big one improves Length of the arc exposed edge the cooling of the Arc. On the other hand cause the large edge length and possibly a structured, uneven or with openings provided sheet metal surface the chance, arc approaches to form on the sheets. Both properties favor the arc voltage build-up.
  • Vacuum switch contacts with staggered arranged Splitter plates have shown that significantly higher arc voltage amplitudes measured as in the case of non-staggered, i.e. stacked quenching plates, wherein the short-circuit current is further limited.
  • the Contour 80 may in particular have a regular serrated shape and serves to extend the splitter edge.
  • the Contour 90 may also be irregular, wherein such a contour depends on the slit of the spiral contacts.
  • Vacuum interrupters with the contact configurations according to the invention and quenching plate assemblies according to the figures 3 to 5 on the one hand and Figures 8 to 10 on the other hand can be based on the figures 1/2 and 6/7 of the prior art realize.
  • Figure 11 shows typical Time curves of the arc voltage for the rotationally symmetric Arrangement. Plotted on the abscissa is the time in s and on the ordinate the arc voltage in volts. Are shown Graphs 101 to 103 for comparison of the invention with the State of the art.
  • the graph 103 of a measurement with splitter staggering includes with respect to the graph 102 of the measurement without the plate spacing, but stacking, and the graph 101 without current limit a considerable improvement to higher arc voltages, which is to be regarded as technical progress.

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  • Arc-Extinguishing Devices That Are Switches (AREA)
EP04106992A 2003-12-29 2004-12-27 Dispositif limiteur de courant Withdrawn EP1551048A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10361398 2003-12-29
DE2003161398 DE10361398B3 (de) 2003-12-29 2003-12-29 Anordnung zur Strombegrenzung

Publications (1)

Publication Number Publication Date
EP1551048A1 true EP1551048A1 (fr) 2005-07-06

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ID=34559775

Family Applications (1)

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EP04106992A Withdrawn EP1551048A1 (fr) 2003-12-29 2004-12-27 Dispositif limiteur de courant

Country Status (2)

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EP (1) EP1551048A1 (fr)
DE (1) DE10361398B3 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101908450A (zh) * 2010-07-20 2010-12-08 中国船舶重工集团公司第七一二研究所 一种直流快速断路器
WO2019038151A1 (fr) 2017-08-24 2019-02-28 Siemens Aktiengesellschaft Limitation de courant comprenant un interrupteur à vide

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1111297A (fr) * 1954-09-14 1956-02-24 Comp Generale Electricite Perfectionnement aux interrupteurs à cloisons d'extinction d'arc
FR1309965A (fr) * 1962-09-10 1963-03-04
FR2441915A1 (fr) * 1978-11-15 1980-06-13 Bbc Brown Boveri & Cie Dispositif pour maitriser les developpements d'arcs electriques dans un disjoncteur a courant continu
GB2089574A (en) * 1980-12-12 1982-06-23 Gen Electric Co Ltd Circuit breaker
EP0428138A2 (fr) * 1989-11-13 1991-05-22 Eaton Corporation Appareil de commutation pour courant continu
EP0793318A1 (fr) * 1996-03-01 1997-09-03 Felten & Guilleaume Austria Ag Dispositif dérivateur de surtensions
DE19913236A1 (de) * 1999-03-23 2000-10-12 Siemens Ag Verfahren zur Strombegrenzung in Niederspannungsnetzen, zugehörige Anordnung sowie spezielle Verwendung dieser Anordnung

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1111297A (fr) * 1954-09-14 1956-02-24 Comp Generale Electricite Perfectionnement aux interrupteurs à cloisons d'extinction d'arc
FR1309965A (fr) * 1962-09-10 1963-03-04
FR2441915A1 (fr) * 1978-11-15 1980-06-13 Bbc Brown Boveri & Cie Dispositif pour maitriser les developpements d'arcs electriques dans un disjoncteur a courant continu
GB2089574A (en) * 1980-12-12 1982-06-23 Gen Electric Co Ltd Circuit breaker
EP0428138A2 (fr) * 1989-11-13 1991-05-22 Eaton Corporation Appareil de commutation pour courant continu
EP0793318A1 (fr) * 1996-03-01 1997-09-03 Felten & Guilleaume Austria Ag Dispositif dérivateur de surtensions
DE19913236A1 (de) * 1999-03-23 2000-10-12 Siemens Ag Verfahren zur Strombegrenzung in Niederspannungsnetzen, zugehörige Anordnung sowie spezielle Verwendung dieser Anordnung

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101908450A (zh) * 2010-07-20 2010-12-08 中国船舶重工集团公司第七一二研究所 一种直流快速断路器
CN101908450B (zh) * 2010-07-20 2012-07-18 中国船舶重工集团公司第七一二研究所 一种直流快速断路器
WO2019038151A1 (fr) 2017-08-24 2019-02-28 Siemens Aktiengesellschaft Limitation de courant comprenant un interrupteur à vide
DE102017214805A1 (de) 2017-08-24 2019-02-28 Siemens Aktiengesellschaft Strombegrenzung mit einem Vakuumschalter

Also Published As

Publication number Publication date
DE10361398B3 (de) 2005-09-29

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