EP2122645A1 - Elément d'extinction, système d'extinction, système d'extinction et de barrage ainsi que dispositif de commutation - Google Patents

Elément d'extinction, système d'extinction, système d'extinction et de barrage ainsi que dispositif de commutation

Info

Publication number
EP2122645A1
EP2122645A1 EP08701498A EP08701498A EP2122645A1 EP 2122645 A1 EP2122645 A1 EP 2122645A1 EP 08701498 A EP08701498 A EP 08701498A EP 08701498 A EP08701498 A EP 08701498A EP 2122645 A1 EP2122645 A1 EP 2122645A1
Authority
EP
European Patent Office
Prior art keywords
extinguishing
plastic
quenching
element according
extinguishing element
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Withdrawn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
EP08701498A
Other languages
German (de)
English (en)
Inventor
Andreas Krätzschmar
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
Original Assignee
Siemens AG
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 filed Critical Siemens AG
Publication of EP2122645A1 publication Critical patent/EP2122645A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
    • H01H9/341—Barrier plates carrying electrodes

Definitions

  • Extinguishing element Extinguishing element, extinguishing device, extinguishing and confining device as well as switching device
  • the invention relates to a plate-shaped extinguishing element for a quenching device of a switching device.
  • the invention relates to an extinguishing device or an extinguishing and confining device with a plurality of such extinguishing elements.
  • the invention relates to a switching device having at least one stationary contact piece and at least one, actuatable by a trip unit movable contact piece and arranged in a region of a switching chamber of the switching device deletion or deletion and confining device.
  • a switching device may be, for example, a circuit breaker, a circuit breaker or a motor protection switch.
  • Plate-shaped extinguishing elements have long been known from the prior art. These are usually made of sheet iron and combined to form a splitter stack or to a quenching device. Typically, a splitter stack consists of about 5 to 20 extinguishing elements. In technical language such plate-shaped extinguishing elements are also referred to as quenching plates.
  • the prerequisite for the extinguishing function of the extinguishing device is, on the one hand, the electrical and, at the same time, magnetic conductivity of the iron.
  • an arc arising when the main contacts of the switching device are opened is drawn into the extinguishing device and extinguished there. That is, the arc is moved away from the switch contacts toward the extinguishing device by the magnetic suction effect. If the arc enters the electrically conductive quenching plates, then this is in individual sections subdivided, and on the quenching plates form new arc base.
  • the disadvantage of this variant is that, due to the high electrical conductivity of the iron or of ferromagnetic metals, the current to be disconnected is relatively poorly limited in the event of a short circuit.
  • the exiting metal vapor partly causes an improvement in the electrical conductivity of the arc plasma, which on the one hand disadvantageously lowers the voltage requirement of the plasma.
  • the residual conductivity of the plasma during the current zero crossing can not be lowered quickly enough and it comes to so-called re-ignitions after the
  • iron-containing quenching plates rust without surface treatment, which can lead to loss of function (either by the "growing together" of the quenching plates by rust bubbles or by the electrical insulation of the grate.)
  • quenching plates must, for example, galvanized surface, but this vaporizes Surface protection at the first short circuit shutdown, so that the problem for further operation again "new" arises.
  • the short-circuit current can be a multiple in comparison to a nominal current to be switched operationally, for example 10 times to 1000 times.
  • the use of highly gassing plastics in the switching chamber is known from the prior art for short-circuit current limiting.
  • the plastics are treated with a flame retardant, e.g. Aluminum hydroxide or
  • Magnesium hydroxide provided.
  • the plastic decomposes and guest out.
  • the energy required for endothermic decomposition of the plastic is thereby removed from the plasma of the arc.
  • a higher mass density or a higher pressure occurs in the plasma, as a result of which heat can be better removed from the arc plasma.
  • the voltage requirement of the arc increases.
  • the outgassing decomposition gases thus have a strong current-limiting effect.
  • the decomposition products can be reflected at the switching contacts of the switching device. This leads disadvantageously to an increase in the contact resistance and thus to a faulty increase in the heating of the switching device.
  • the purpose of the polymeric current limiter is to increase the switching capacity of the switching device used. It remains in nominal operation, in overload mode and in case of minor short circuits inactive. Only with larger short-circuit currents does the polymer compound intervene with a sudden increase in resistance to limit the current of the short circuit. Consequently, the switching device does not need to be designed for the maximum possible short-circuit current, but only for the limited by the polymer compound short-circuit current.
  • the polymer compound is electrically connected in series and generates an additional electrical power loss through its rail resistance even in nominal or overload operation.
  • thermally activated current limiters can lead to faulty circuits (early tripping) if electrical loads such as motors are frequently switched on at short intervals.
  • the inrush current flowing at switch-on corresponds approximately to 6 to 10 times the rated current, so that the polymer compound is strongly heated.
  • Such a polymer compound consists of an electrically nonconducting phase, the so-called matrix, and a conductive phase, that is, a filler.
  • the matrix used is a plastic, in particular a thermoplastic, and as filler carbon black.
  • carbon black metal particles or graphite can also be used.
  • the three-dimensional arrangement of the filler particles in a two-component system consisting of the matrix and the filler is also referred to as a percolation network.
  • the filler concentration is also referred to as the percolation threshold. In other words, by suitable selection of the filler concentration, a specific electrical conductivity value for the polymer compound can be specified.
  • a plate-shaped extinguishing element for a quenching device of a switching device having the features of patent claim 1.
  • Advantageous embodiments are given in the dependent claims 2 to 16.
  • a quenching device is called with a plurality of inventive plate-shaped extinguishing elements.
  • advantageous embodiments of the extinguishing device are indicated.
  • an extinguishing and confiscation device is called.
  • Advantageous embodiments of the extinguishing and confining device are given in the dependent claims 24 and 25.
  • a switching device is specified, which has an extinguishing device according to the invention or an extinguishing and confiscation device according to the invention.
  • the extinguishing element is made of an electrically and at the same time magnetically conductive plastic. This can also have an active gassing effect.
  • the electrical conductivity of such plastics is lower than that of metals, a Short-circuit current limit improved by means of an extinguishing element or by means of a plurality of extinguishing elements according to the invention. At the same time ensures the magnetic conductivity of the plastic, the magnetic suction of the arc occurring when switching off the switching device to the extinguishing element or to the plurality of extinguishing elements.
  • the extinguishing element is made of an electrically non-conductive plastic matrix as having introduced therein, electrically and at the same time magnetically conductive particles.
  • the particles have a volume fraction of 50% to 95%, in particular in a range of 70% to 90%, in the plastic material of the extinguishing element.
  • the magnetic and electrically conductive particles are ferromagnetic particles.
  • metals such as iron, nickel or cobalt and their alloys, such as e.g. Nickel cobalt alloys, in question.
  • the metal particles have lengths of up to 0.5 mm, but preferably in the range of 50 to 300 ⁇ m, at least in one spatial direction.
  • the plastic is a thermoplastic, in particular a polybutylene terephthalate or a polyoxymethylene.
  • Polybutylene terephthalate (abbreviated to PBT) is characterized by high rigidity and strength, very good dimensional stability in heat, low water absorption and good resistance to many chemicals. In addition, this plastic has an excellent heat aging behavior.
  • Polyoxymethylene or polyacetal (abbreviated POM) is characterized among other things by a high mechanical rigidity and strength, optimum dimensional stability and very good resistance to different chemicals.
  • the extinguishing element is made of an electrically conductive plastic as a matrix with magnetically conductive particles introduced therein.
  • Conductive plastics as such are known in the art. Such plastics do not obtain their electrical conductivity by the addition of further electrically conductive substances, such as metals, carbon black or graphite, but by suitable doping of electrically non-conductive polymers, that is of insulators. The reason for this is that the polymers completely lack the basic requirement for electrical conductivity, quasi-free electrons. By adding substances (doping), which for the electron movement of either the polymer chain electrons (reduction) or by removal (oxidation) create vacancies, electrically conductive polymers can be prepared.
  • polyacetylene and poly (p-phenylene) become electrically conductive when doped with bromine, iodine or perchloric acid.
  • Another possible electrically conductive polymer is polyaniline doped with hydrochloric acid and polypyrrole from anodic oxidation.
  • the magnetically conductive particles have a volume fraction of 50% to 95%.
  • the magnetically conductive particles are ferrites.
  • Ferrites are electrically poor or non-conductive ferromagnetic ceramic materials of iron oxide hematite (Fe 2 ⁇ 03), more rarely magnetite (Fe 3 O 4) and other metal oxides. Ferrites conduct the magnetic flux very well in the non-saturated case. They have a comparatively high permeability. Preferably it is The ferrites under consideration are soft-magnetic ferrites.
  • the plastic preferably has a specific electrical conductivity in the range from 10 3 to 10 6 Siemens / meter. That is, the conductivity of the plastic used for the quenching element is one to two orders of magnitude lower than that of metals, in particular the iron metal commonly used. Due to the advantage considerably lower
  • Conductivity is also a significant current limit of the arc possible. Nevertheless, the specific electrical conductivity in the abovementioned range of 10 3 to 10 6 Siemens / meter compared to undoped thermoplastics with conductivity values of significantly less than 1 mS / meter is extremely high.
  • the plastic has a magnetic permeability of more than 10. It is thus an order of magnitude larger than that of the diamagnetic or paramagnetic substances.
  • the magnetic permeability is relatively low compared to ferromagnetic materials, such as. Iron, with a permeability of more than 100. However, this is quite sufficient for an effective magnetic suction.
  • the plastic for a quenching element described above may also be a mixture of undoped and thus non-conductive thermoplastics and of a doped thermoplastic.
  • the plastic has a flame retardant, in particular with a volume fraction of up to 10%.
  • the volume fraction may also be lower, e.g. to 5%, or above, e.g. between 10% to 20%.
  • the flame retardant is preferably a metal hydroxide such as aluminum hydroxide or magnesium hydroxide.
  • the flame retardant may be, for example, polybrominated diphenyl ether, tetrabromobisphenol or the like.
  • the extinguishing element according to the invention can be produced by means of an extrusion and / or injection molding process.
  • a plastic granulate is preferably melted in an extruder to a viscous mass and mixed.
  • Extruders are conveyors that press solid to viscous masses under high pressure and high temperature evenly from a shaping opening according to the principle of operation of the Archimedean screw.
  • this plastic matrix the previously described only magnetically or magnetically and electrically conductive particles and optionally the flame retardant are added. After mixing and homogenization of the injection molding of the plate-shaped extinguishing elements.
  • the extinguishing element has a substantially rectangular shape.
  • it has a U-shaped or semicircular recess.
  • the recess is located at the edge of one of the four sides of the extinguishing element.
  • the recess is designed such that the arc running into the recess meets the extinguishing element uniformly.
  • the extinguishing element has a structured surface.
  • the arc mobility is advantageously limited, so that it is mainly used within the extinguishing device.
  • the extinguishing elements can be configured, for example, corrugated. You may alternatively or additionally have a variable splitter thickness. You can continue surveys, Indentations, webs and / or openings for changing the flow behavior of the arc have.
  • the object of the invention is further arranged by a quenching device with a plurality of stacked
  • the extinguishing elements can be injected into a housing of a switching device by means of a plastics manufacturing process.
  • the housing is made of an electrically non-conductive plastic and possibly of a magnetically conductive plastic.
  • the plastic may have a flame retardant.
  • the extinguishing device may be made up of a plurality of
  • Extinguishing elements may be formed, which are held together in the lateral area by means of spacers.
  • the spacers may for example be made of an electrically non-conductive plastic.
  • the spacers may be made of fiberglass or ceramics.
  • the extinguishing device itself may have a housing into which the extinguishing elements can be injected by means of a synthetic material production process.
  • the housing is made in this case of an electrically non-conductive plastic and optionally of a magnetically conductive plastic.
  • the plastic may have a flame retardant.
  • the extinguishing device can be produced in one piece by means of a plastic production process. This allows the extinguishing device advantageous in a single manufacturing step are produced, such as in an injection molding.
  • the quenching device is multi-phase, in particular 3-phase, formed.
  • Such an extinguishing device is advantageously more compact compared to separately performed extinguishing devices.
  • the quenching device has a phase quenching device for each phase, which can be injected together into the switching device housing.
  • the object of the invention is further achieved by an extinguishing and damming device, which has an extinguishing device according to the invention and at the same time an injection unit which can be sprayed onto the extinguishing device.
  • the extinguishing and damming device is preferably produced by means of a plastic injection molding process.
  • the confinement unit serves to prevent the arc from emerging behind the extinguishing elements. It is therefore arranged on a rear side of the extinguishing device facing away from the incoming arc.
  • the confinement unit represents a flow resistance for the arc, which causes the arc to remain within the extinguishing device and ultimately extinguish there.
  • Extinguishing device may have openings to increase the flow resistance or be formed labyrinth-shaped.
  • the extinguishing and confining device can be produced in a (single) injection molding step.
  • a manufacturing process is the so-called 1 x 2K plastic injection molding process.
  • different synthetic materials are used. Substances are injected together in different areas of the injection mold, which then connect inextricably with each other.
  • the types of plastic needed for the quenching device and for the detackification unit are injected together into the injection mold.
  • the plastic used for spacing the extinguishing elements is the same as that used for the damming unit.
  • this plastic is a non-conductive plastic, such as PBT or POM.
  • the extinguishing and confining device can be produced by means of a so-called 2 x 1K plastic injection molding process.
  • different types of plastic are successively sprayed on one another. That is, e.g.
  • the extinguishing elements are produced such that, in a second injection molding step, the housing or a number of spacers of the extinguishing device is produced, which inter alia firmly connects the plurality of extinguishing elements with one another, and in a third step Damming unit is molded onto the extinguishing device.
  • the last two steps can also be summarized in a single step, especially if a type of plastic is used for both the housing or for the spacer and for the confining unit.
  • a nonconductive material in particular a plastic, e.g. PBT or POM, used.
  • the object is finally achieved by a switching device with at least one fixed contact piece and at least one controllable by a trip unit movable contact piece and arranged in a region of a switching chamber of the switching device according to the invention extinguishing device or extinguishing and confiscation device according to the invention.
  • the extinguishing device or extinguishing and confining device produced by means of the methods described above can be produced in a high number of units and in a production-wise simple way. This eliminates the hitherto required complex installation of the extinguishing device or the extinguishing and confining device from the large number of extinguishing plates, which must be summarized in the connection still to a splitter stack. Also, the separate attachment of the confining unit is unnecessary to the extinguishing device.
  • Another advantage is the lower weight of the extinguishing elements according to the invention or the extinguishing device due to the lower specific weight of the plastics used in comparison to the conventionally used heavy iron sheet.
  • Such a switching device is protected by the active current limitation by means of the extinguishing device according to the invention or
  • Extinguishing and damming device particularly compact executable. Due to the lighter weight extinguishing device or extinguishing and damming device and the weight of the switching device according to the invention is advantageously lower.
  • Another advantage is the increased reliability of such a switching device, since the extinguishing device or the extinguishing and confining device are not arranged in the direct contact region of the switching contacts of the switching device. Another premature outgassing of the extinguishing elements by the adjacent and hot in switching operation switching contacts is thereby advantageously avoidable.
  • Show it 1 shows an example of a structure of a switching device according to the prior art
  • FIG. 3 shows the extinguishing and confining device according to FIG. 2 in a sectional view through a splitter plate along the section line III-III indicated in FIG. 2
  • FIG. 4 shows by way of example the construction of a switching device with a current-limiting polymer compound according to the prior art
  • FIG. 5 shows by way of example a top view of a sectional view through an extinguishing device according to the invention or through an extinguishing and confiscating device according to the invention
  • FIG. 6 shows a sectional view of the extinguishing device or the extinguishing and confiscating device according to FIG. 5 along the section line VI-VI shown in FIG. 5, FIG.
  • FIG. 8 a sectional view through a multipole extinguishing and confining device according to the invention injected into a housing of a switching device
  • FIG 9 is a plan view of the extinguishing
  • FIG. 1 shows an example of a structure of a switching device 1 according to the prior art.
  • the electrical connections E, A that is, the input E and output A, the switching device 1 can be seen.
  • the main contacts 3 consisting of a fixed contact piece 3a and a movable contact piece 3b, shown.
  • the movable con- Clock piece 3b can be pivoted in a detected overcurrent or short circuit case by means of a trip unit 2, such as by means of a control magnet to open the main contacts 3 according to the arrow direction.
  • the reference symbol LB denotes an arc which, in particular in the event of a short circuit, runs to the right in the direction of a further arrow, where it strikes an erasing device 5a.
  • the arc LB runs along rails 4, which are electrically connected to the quenching device 5a.
  • the extinguishing device 5a consists of a plurality of extinguishing plates 6, which are combined to form an iron sheet package.
  • FIG. 2 shows, by way of example, a side view of an extinguishing and confining device 5 in a side view according to the prior art.
  • the arrow indicates the direction of movement of the arc LB.
  • the arc LB running into the quenching device 5 a is then cooled on the inner sides IS of the quenching device 5 a, that is to say on the outer sides of the quenching plates 6.
  • the consequent increased voltage requirement of the arc LB leads to extinction and thus to the demolition of the switching current.
  • Reference numeral 5b denotes a confining unit. It is typically made of an electrically non-conductive plastic, a ceramic or fiberglass, and prevents leakage of the arc LB from the extinguishing device 5b.
  • FIG. 3 shows the extinguishing and confining device 5 according to FIG. 2 in a sectional representation through a splitter plate 6 along the section line III-III entered in FIG.
  • a U-shaped recess AS is now to be seen, which is geometrically tuned to the vertical front of the arc LB upon arrival in the quenching device 5a.
  • the recess AS can also have a semicircular or another geometrically suitable shape.
  • FIG. 4 shows by way of example the structure of a switching device 1 with a current-limiting polymer compound 10 according to the prior art.
  • the polymer compound or the polymeric current limiter 10 is then switched into the current path when the arc LB runs along the rails 4.
  • a limiting resistor connected in parallel thereto is drawn.
  • the polymer compound 10 increases abruptly in a short circuit its resistance, whereby the current increase in the switching device 1 is limited.
  • FIG. 5 shows, by way of example, a plan view of a sectional representation through an extinguishing device 5a according to the invention or through an extinguishing and confining device 5 according to the invention.
  • the plate-shaped extinguishing element 6 for a deletion device 5a of a switching device 1.
  • the plate-shaped extinguishing element 6 has a rectangular shape with a U-shaped recess AS.
  • the plate-shaped extinguishing elements can also have a structured surface.
  • the extinguishing element 6 is made of an electrically and at the same time magnetically conductive plastic.
  • the electrically non-conductive plastic forms a matrix 13, in which electrically and at the same time magnetically conductive particles 12 are introduced.
  • the particles 12 are in the example game of FIG 5 shown as small dots. They can have a volume fraction of 50% to 95%.
  • the mentioned particles 12 may be metallic particles 12, such as iron, cobalt, nickel particles. They can also be alloys thereof.
  • an electrically conductive plastic may be used as the matrix 13, e.g. doped polyacetylene, polyphenylene or polyaniline.
  • an electrically conductive plastic instead of the electrically and at the same time magnetically conductive particles 12, only magnetically conductive particles 12, that is to say substantially electrically non-conductive particles 12, can be introduced into the plastic.
  • the required electrical conductivity of the extinguishing element 6 is given in this case by the electrically conductive plastic itself.
  • the predominantly only magnetically conductive particles 12 are in particular ferrites. Their volume fraction in the plastic material is in a range of 50% to 95%.
  • both aforementioned embodiments, in which an electrically conductive or an electrically non-conductive plastic is used as the matrix 13, can also be combined with each other.
  • the finally produced plate-shaped plastic extinguishing elements 6 have a specific electrical conductivity in the range of 10 3 to 10 6 Siemens / meter.
  • the permeability number describing the magnetic conductivity of the synthetic material has a value of more than 10, such as 100, for example.
  • a flame retardant can also be introduced into the plastic matrix 13, in particular with a volume fraction of up to 10%.
  • the flame retardant is especially a metal hydroxide such as aluminum hydroxide.
  • the introduced flame retardant is in the example of FIG 5 is not shown graphically for reasons of clarity.
  • FIG. 5 In the left part of FIG. 5 there is further shown a sectional view of one of an electrically nonconductive plastic, e.g. PBT or POM, can be seen. It therefore has no electrically conductive and magnetically conductive particles 12.
  • the confining unit 5b typically, but not necessarily, has no flame retardant.
  • the combined quenching and confining unit shown is manufactured in a single injection molding step, that is to say in one piece, such as e.g. by means of a 1 x 2K plastic injection molding process.
  • the extinguishing device 5a may have a housing in which the extinguishing elements 6 according to the invention are inserted spaced from one another.
  • the housing is made of an electrically non-conductive and optionally magnetically conductive material, in particular of a plastic.
  • the plate-shaped extinguishing elements 6 according to the invention can be held together by means of electrically non-conductive spacers. These are preferably arranged in relation to the running direction of the arc LB in the lateral direction, that is, at the side edge of the extinguishing elements 6.
  • a quenching device 5a can be produced in such a way that the quenching elements 6 are injected directly into the housing of the quenching device 5a.
  • the housing may, for example, be made of plastic or of a ceramic.
  • FIG. 6 shows a sectional view of the deletion device 5a or of the deletion and suspension device 5 according to FIG. 5 along the section line VI-VI entered in FIG.
  • the extinguishing elements 6 have an equal distance from each other.
  • the distance is typically in the millimeter range.
  • the retaining walls 5c see the following FIG. 7, which keep the extinguishing elements 6 at a distance and which are preferably made of the same plastic as the confining unit 5b, are not visible.
  • FIG. 7 shows a front view of the extinguishing device 5a or of the extinguishing and confining device 5 according to FIG. 5 and FIG. 6 corresponding to the viewing direction shown in FIG.
  • extinguishing and confiscation device 5 In this illustration, in particular the compact design of the extinguishing and confiscation device 5 according to the invention can be seen.
  • the extinguishing elements 6 are held together by holding webs 5c and retaining walls 5c, which are formed on the side surfaces SF of the extinguishing device 5a.
  • FIG. 8 shows a sectional view through a multi-phase extinguishing and confining device 5 according to the invention injected into a housing 14 of a switching device 1.
  • phase quenching device 5 for each phase L1-L3 a phase quenching device 5a.l-5a.3, which are injectable into the switching device housing 14 together.
  • the switchgear housing 14 is made of an electrically non-conductive material, in particular of a plastic.
  • the extinguishing elements 6 according to the invention injected into the switchgear housing 14 are arranged in such a way that they within the respective phase quenching devices 5a.l-5a.3 are spaced. Between the quenching elements 6 of a phase L1-L3 are not further designated cavities, through which the arc LB can pass. In addition, the electrically and at the same time magnetically conductive extinguishing elements 6 are arranged to be extinguishing elements 6 of adjacent phase quenching devices 5a.l-5a.3 electrically insulating.
  • FIG. 9 shows a plan view of the extinguishing and confining device 5 according to the invention as shown in FIG. 8.
  • the electrically insulating arrangement of the extinguishing elements 6 is clearly recognizable with respect to extinguishing elements 6 of adjacent phase extinguishing devices 5a.i-5a.3.
  • the reference numeral 5b shows cavities, which for example each form a confinement unit 5b for the respective phase L1-L3. They can therefore also be regarded as phase confinement units.
  • a switching device 1 comprises at least one fixed contact piece 3a and at least one movable contact piece 3b that can be triggered by a triggering unit 2, in addition to a quenching device 5a according to the invention arranged in an area of a switching chamber of the switching device 1.
  • the extinguishing device 5a and the extinguishing and confining device 5 are electrically connected to rails 4, which in turn lead to the electrical connections E, A of the switching device 1.
  • the plastic has a flame retardant.
  • the invention relates to a quenching device and a quenching and damming device with a plurality of such quenching elements. Furthermore, the invention relates to a switching device with such a er Löscheraum or such extinguishing and Verdämmungs liked.
  • a special feature of the invention is electrical and at the same time magnetic conductivity of the plastic extinguishing elements.
  • the simultaneously gassing effect is more efficient than the evaporation of a conventionally used iron sheet to increase the arc voltage and to avoid re-ignition.
  • the lower electrical conductivity compared to iron or metals in general significantly improves the current-limiting effect.
  • Another big advantage is the significantly simplified production of the extinguisher or the combined extinguishing and Verdämmseinrich- device. They can now be produced in one piece, with the damper unit and other parts, such as e.g. for attachment, can be sprayed with. Due to the improved oxidation behavior, a refining surface treatment, as is the case with conventional quenching plates, is not required.

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)

Abstract

L'invention concerne un élément d'extinction en forme de plaque (6) pour un système d'extinction (6) d'un dispositif de commutation (1), fabriqué selon l'invention à partir d'un plastique électriquement et magnétiquement conducteur. Dans un mode de réalisation particulier, le plastique présente un agent ignifuge. L'invention concerne un système d'extinction (5a) ainsi qu'un système d'extinction et de barrage (5) comprenant une pluralité de ce type d'éléments d'extinction (6). En outre, l'invention concerne un dispositif de commutation (1) muni d'un tel système d'extinction (5a) ou d'un tel système d'extinction et de barrage (5).
EP08701498A 2007-01-18 2008-01-15 Elément d'extinction, système d'extinction, système d'extinction et de barrage ainsi que dispositif de commutation Withdrawn EP2122645A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007002723 2007-01-18
PCT/EP2008/050389 WO2008087136A1 (fr) 2007-01-18 2008-01-15 Elément d'extinction, système d'extinction, système d'extinction et de barrage ainsi que dispositif de commutation

Publications (1)

Publication Number Publication Date
EP2122645A1 true EP2122645A1 (fr) 2009-11-25

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP08701498A Withdrawn EP2122645A1 (fr) 2007-01-18 2008-01-15 Elément d'extinction, système d'extinction, système d'extinction et de barrage ainsi que dispositif de commutation

Country Status (3)

Country Link
US (1) US8809721B2 (fr)
EP (1) EP2122645A1 (fr)
WO (1) WO2008087136A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021023325A1 (fr) * 2019-08-05 2021-02-11 Lisa Dräxlmaier GmbH Commutateur électrique pour ouvrir un trajet de courant

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Publication number Priority date Publication date Assignee Title
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US8809721B2 (en) 2014-08-19

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