EP1302957B1 - Low-voltage high-power contact arrangement - Google Patents
Low-voltage high-power contact arrangement Download PDFInfo
- Publication number
- EP1302957B1 EP1302957B1 EP20020022180 EP02022180A EP1302957B1 EP 1302957 B1 EP1302957 B1 EP 1302957B1 EP 20020022180 EP20020022180 EP 20020022180 EP 02022180 A EP02022180 A EP 02022180A EP 1302957 B1 EP1302957 B1 EP 1302957B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- contact
- quenching
- low
- breaking
- voltage high
- 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.)
- Expired - Lifetime
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
- H01H31/02—Details
- H01H31/12—Adaptation for built-in fuse
- H01H31/122—Fuses mounted on, or constituting the movable contact parts of, the switch
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H11/00—Apparatus or processes specially adapted for the manufacture of electric switches
- H01H11/0006—Apparatus or processes specially adapted for the manufacture of electric switches for converting electric switches
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- 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
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- 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
- H01H9/342—Venting arrangements for arc chutes
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- 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
- H01H9/345—Mounting of arc chutes
Definitions
- the present invention relates to a contact arrangement for NH fuse switch disconnector, NH fuse load switch strips or the like with a contact tulip for receiving a knife NH fuse and contact protection for the contact tulip, which with an opening for performing the safety knife and adjacent to this opening with molded extinguishing plates is provided as an arc extinguishing agent.
- Such contact arrangements are known and also in practical use. They can be single or multi-pole.
- the NH fuse is attached to the underside of a switch cover which is pivotally mounted on the circuit breaker or the load switch bar or by parallel guides.
- a switch cover which is pivotally mounted on the circuit breaker or the load switch bar or by parallel guides.
- extinguishing chambers are known as extinguishing agent on such contact arrangements, which are provided with a plurality of approximately U-shaped and stacked at a mutual distance stacking plates. From their extinguishing effect, the extinguishing chambers are superior to the extinguishing plates. From their construction, however, they are much more expensive and expensive than extinguishing plates, which can be obtained simply as molded ribs in the production of contact protection as a plastic injection molded part without any additional effort.
- NH fuse switch disconnectors NH fuse switch disconnectors or the like
- Devices in which contact arrangements of the type considered are used are usually designed for a specific switching capacity according to IEC 60947-3.
- a standardized switching capacity is, for example, AC22 at 690V.
- Another normalized switching capacity is AC 23 at 690 V. Due to the limited extinguishing effect of extinguishing plates, contact arrangements of the type mentioned in the introduction are only used in practice up to the aforementioned switching capacity of AC22. For larger switching capacities, such as those mentioned by AC23, contact arrangements with extinguishing chambers are used.
- a contact arrangement is provided, which can be easily adapted to the above-mentioned different circumstances by merely on-demand mounting a quenching chamber on the standard existing extinguishing plates.
- the invention reduces the variety of types of NH fuse switch disconnectors, NH fuse switch-disconnectors or the like, which also has a favorable effect on the storage.
- Another advantage of the invention is the fact that the combination of extinguishing plates and quenching chamber even better extinguishing properties than the parts mentioned each alone.
- the quenching chamber comprises, in a manner known per se, an insulating material housing into which the quenching plates, in particular those of a U-shaped design, are inserted and held therein by guides.
- the extinguishing plates advantageously engage between the legs of the U-shaped extinguishing plates in the extinguishing chamber.
- the extinguishing chamber in the plugged state can be determined in particular by a snap connection.
- a knock-out opening can be provided between the extinguishing plates and / or a knock-out opening can be provided in the contact protection area in the attachment area of the extinguishing chamber.
- extinguishing plates and extinguishing chamber should be dimensionally and dimensionally adapted to each other.
- the properties of the contact device according to the invention can be further improved by providing two, preferably slightly resilient, guide ribs as insertion aids for the safety knife into the contact tulip on the underside of the contact protection facing the Kontkattulpe.
- these guide ribs can be obtained without additional effort in the formation of contact protection as a plastic injection molded part by simply spraying.
- By mediated by the guide ribs centering of the safety knife this hits when switching virtually simultaneously on both legs of the contact tulip, whereby the contact bounce and the associated burnup are greatly reduced.
- means are formed on the contact arrangement, which ensure a targeted discharge of the resulting when opening or closing the NH fuse gases.
- the means selectively deliver the gases from the conductor regions of the contact arrangement. This is achieved by the gases are at least partially removed via an arranged directly on the side facing away from the NH fuse side of the contact tulip upper discharge opening and a related discharge channel from a housing formed by the contact protection upwards.
- Such a preferred embodiment can be realized by at least one discharge channel to the inside (ie in the direction of the housing interior) is integrally formed at an opening in the contact protection substantially directly on the side facing away from the NH fuse side of the extinguishing plates, which with the housing interior in the direction of Contact tulip is connected via an upper discharge opening.
- This discharge channel preferably has two side walls (in particular substantially perpendicular to the front cover of the housing) and a horizontal bottom, and further preferably has on the side facing away from the NH fuse on a curved bottom upwards. This curvature serves to deliberately not only remove the gases which normally explode explosively during the opening upwards, but also to control the gases and remove them from the entire contact arrangement as efficiently as possible by additionally guiding them forwards.
- At least one longitudinal web is particularly preferably arranged between the extinguishing plates, which extends at least to the horizontal bottom of the discharge channel, ie which first extends in the gap between the two extinguishing plates and then in the upper discharge opening (the gap between the two extinguishing plates and the discharge opening are not separated from each other, but form a large opening).
- a vertical inner partition is arranged substantially perpendicular to the plane of the contact tulip, and by this vertical inner partition a Recess has, whose upper part forms the upper discharge opening, and whose lower part forms a lower discharge opening, wherein preferably the at least one longitudinal web also extends over the lower discharge opening, and particularly preferably additional lateral longitudinal webs substantially parallel to at least one longitudinal web in the The additional webs serve in particular for protection against contact.
- the NH fuse switch disconnector comprises a contact tulip 2, which two spring against each other Contact arms 2.1 and 2.2 has.
- 3 is one of the best in the FIGS. 3 and 4 identifiable NH fuse denotes, which has on both sides of a fuse body a safety knife, of which in the figures only 4 is shown in each case. In the Figures 1 - 4 this safety knife 4 is received by the contact tuple 2 between the arms 2.1 and 2.2.
- a contact protection which covers the area of the contact tulip 2 against the user (in each case upward). It is made in one piece and injection molded from a plastic insulating material such as polyamide. Directly above the contact tulip 2, a lead-through opening 6 is released in the contact protection 5, through which the safety blade 4 for turning on and off of the NH fuse switch-disconnector is feasible.
- the NH fuse 4 is usually attached to a switch cover, not shown here, which is often also applied pivotally. In this case, the NH fuse can be pivoted together with the switch cover around its pivot axis, as indicated by the arrows in the FIGS. 3 and 4 is indicated.
- the extinguishing plates 7 are integrally formed on both sides and along the pivotal opening 6 on the contact protection as an upstanding narrow ribs. At her in the FIGS. 5 and 6 rear upper corner they are connected to each other via a crosspiece 7.1. Between this crossbar 7.1 and the contact protection 5 also extends a longitudinal web 7.2.
- the extinguishing plates 7 are generally sufficient as extinguishing means for the arc.
- switching capacity such as AC 23 at 690
- the quenching chamber 8 in addition to the above-mentioned quenching chamber 8 to mount on the extinguishing plates 7. The assembly takes place by simply plugging.
- the quenching chamber 8 comprises a Isolierstoffgeophuse 9 in which a plurality (eg five to ten) about U-shaped quenching plates 10 are inserted and held stacked therein.
- a plurality eg five to ten
- guides 11 are provided for the quenching plates.
- the quenching chamber housing 9 is provided with snap hook 12, which engage in snap openings 13 in the contact protection 5.
- the two quenching plates 7 engage between the u-shaped quenching plates 10 in the quenching chamber 8 and cover their u-legs aside.
- the connecting web 7.2 is provided to advantage with correspondingly suitable predetermined breaking points.
- a region of the contact protection 5, which comes to lie below the rear connection region of the quenching plates when the quenching chamber 8 is plugged forms a breakout opening 14 and breaks out before the extinguishing chamber 8 is plugged on.
- FIG. 1 and 2 Yet another advantageous embodiment of the inventive NH fuse switch-disconnector is shown, which consists of two guide ribs 15 which are integrally formed on both sides of the lead-through opening 6 for the safety knife 4 and the extinguishing plates 7 approximately opposite to the underside of the contact protection.
- the guide ribs 15 are further formed so that they engage a distance between the two legs 2.1 and 2.2 of the contact tulip 2 and thereby form a centering and insertion aid for the insertion of the safety blade 4 in the contact tulip 2 when switching.
- the safety knife 4 comes on contact virtually simultaneously with both Mixulpenschenkeln 2.1 and 2.2 in contact, whereby the unwanted contact bounce and contact erosion are substantially reduced.
- the two guide ribs 15 are, like the Löchplatten 7, spritzed directly to the contact protection 5 and form insofar as the extinguishing plates an integral part of this.
- FIGS. 7 to 10 Another embodiment of the present invention is in the FIGS. 7 to 10 shown.
- the FIGS. 7a ) and 8a) show perspective views of the embodiment without patch extinguishing chamber 8
- the FIGS. 7b ) and 8b) show corresponding perspective views of the embodiment with attached extinguishing chamber 8.
- the opening on which the extinguishing chamber 8 is placed if necessary not provided with a Ausbrechplatte, but always open, ie even when used without extinguishing chamber. 8
- Fig. 7a It can be seen how in the surface of the housing, ie in the contact protection 5 a hole immediately adjacent to the area of the extinguishing plates 7 is present, in which hole a discharge channel 16 is arranged.
- the longitudinal web 7.2 between the two extinguishing plates is extended downward in this case, so that the upper discharge opening 26 is divided centrally by this longitudinal web 7.2.
- the discharge channel 16 has a horizontal bottom 17, which is arranged parallel to the upper housing surface and slightly offset in the depth.
- the recess has a depth of in the range of 8 to 15 mm, which depth of course also depends on the specification of the contact arrangement and the associated size of the NH fuse.
- the depth is 9mm, for size 2 (400A) and size 3 (630A) 12mm.
- the discharge channel 16 is bounded by two side walls 18. Also recognizable in Fig. 7a ) are the additional ventilation slots 21 on the front of the housing, as well as additional ventilation slots 22 in the upper side wall of the housing. With upper side wall in this case, the viewer facing side wall of the housing is called. The function of these additional ventilation slots will be seen below.
- Fig. 8a shows in addition the special configuration of the discharge channel 16. This has in fact in its fuse-remote area on a curved bottom 20.
- the upward curvature of this lower bottom causes the usually resulting from the contact, explosive wave of hot gases is initially transported parallel to the main direction of the safety knife 4, and then targeted by the curvature in the insertion direction of the fuses, ie Front side of the housing is led out. This is necessary to ensure optimal and efficient discharge of the gases.
- Fig. 7b The housing 9 of the quenching chamber 8 has on its side facing away from the fuse between the quenching plates 10 via ventilation slots 24, which also ensures efficient removal of the resulting gases from the region of the contacts, and optionally can dissipate occurring heat development.
- the opening of the discharge channel 16 is not completely covered, but leaves an opening in the region remote from the fuse, so that even with mounted extinguishing chamber 8, the resulting gases are not hindered by the patch chamber. Accordingly, it is also apparent why the curved portion 20 of the bottom of the discharge channel 16 is slightly offset from the trailing edge of the extinguishing plates 7.
- the quenching chamber 8 is located substantially above the flat bottom 17 of the AbGermankanals 16, ie in this area, the exiting gas is initially performed only parallel to the front of the housing, and only behind the the quenching chamber 9, the gases through the curved bottom 20 deflected out of the recess of the discharge channel 16 out.
- Fig. 8b shows the contact arrangement with attached extinguishing chamber 8 gem.
- Fig. 7b in a view from the side of the NH fuses.
- Fig. 9a 1) shows in particular how the guidance of the gases produced at the contact closure within the housing is further optimized by providing a vertical inner dividing wall 25, which defines the area in which the safety knife 4 is arranged, separated from the other housing interior 28 substantially.
- the partition wall 25 now has in its uppermost, ie the front side of the housing facing area over the already above-mentioned upper discharge opening 26, which opens into the discharge channel 16.
- a lower discharge opening 27 is arranged in the partition wall 25, through which emerging gases can escape into the housing interior 28. Accordingly, a first portion of the resulting gases passes through the upper discharge opening 26, and a second portion exits into the area 28. From there, the gases are now prevented from flowing back into the region of the contacts by the partition wall 25.
- the gases are discharged from the housing interior 28 via the ventilation slots 21 and 22 already mentioned above.
- the combination of a direct discharge via the discharge channel 16 with an indirect discharge via the lower discharge opening 27 first into the housing interior 28 and then through the slots 21 and 22 to the outside, wherein the vertical inner partition 25 prevents the gases from the housing interior 28 back into the field of contacts proves to be particularly efficient.
- Fig. 9b again shows the arrangement acc. Fig. 9a
- the quenching chamber 8 is located substantially above the flat portion 17 of the bottom of 16, whereby an optimal chimney effect can be achieved even when mounted extinguishing chamber 8.
- FIGS. 10a ) and b) also shows perspective views into the interior of a contact arrangement from below.
- Fig. 10a it can be seen that the longitudinal web 7.2 and the two lateral longitudinal webs 19 extend not only on the upper discharge opening 26, but also on the lower discharge opening 27. Again, so an increased stability of the construction can be ensured. In particular, but dadruch a further protection against contact is guaranteed.
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- Arc-Extinguishing Devices That Are Switches (AREA)
- Fuses (AREA)
Description
Die vorliegende Erfindung betrifft eine Kontaktanordnung für NH-Sicherungslasttrennschalter, NH-Sicherungslastschaltleisten oder dergleichen mit einer Kontakttulpe zur Aufnahme eines Messers einer NH-Sicherung und mit einem Berührungsschutz für die Kontakttulpe, welcher mit einer Öffnung für das Durchführen des Sicherungsmessers sowie angrenzend an diese Öffnung mit angeformten Löschplatten als Lichtbogen-Löschmittel versehen ist.The present invention relates to a contact arrangement for NH fuse switch disconnector, NH fuse load switch strips or the like with a contact tulip for receiving a knife NH fuse and contact protection for the contact tulip, which with an opening for performing the safety knife and adjacent to this opening with molded extinguishing plates is provided as an arc extinguishing agent.
Derartige Kontaktanordnungen sind bekannt und auch im praktischen Einsatz. Sie können ein- oder mehrpolig ausgeführt sein. Üblicherweise ist die NH-Sicherung an der Unterseite eines Schaltdeckels befestigt, welcher an dem Trennschalter oder der Lastschaltleiste schwenkbar oder durch Parallelführungen befestigt ist. Insbesondere beim Ausschalten, wenn das/die Messer der NH-Sicherung aus seiner/ihren Kontakttulpe/n herausgezogen wird, entsteht ein Lichtbogen. Bei der Löschung dieses Lichtbogens helfen die Löschplatten.Such contact arrangements are known and also in practical use. They can be single or multi-pole. Usually, the NH fuse is attached to the underside of a switch cover which is pivotally mounted on the circuit breaker or the load switch bar or by parallel guides. In particular, when switching off, when the / the blade of the NH fuse is pulled out of his / her contact tulip / n, an arc is created. When extinguishing this arc, the extinguishing plates help.
Als Löschmittel an solchen Kontaktanordnungen sind andererseits auch Löschkammern bekannt, die mit mehreren etwa u-fömigen und mit gegenseitigem Abstand übereinander gestapelten Löschblechen versehen sind. Von ihrer Löschwirkung her sind die Löschkammern den Löschplatten überlegen. Von ihrem Aufbau her sind sie jedoch wesentlich aufwendiger und teurer als Löschplatten, die z.B. bei der Herstellung des Berührungsschutzes als Kunststoffspritzteil ohne jeden zusätzlichen Aufwand einfach als angespritzte Rippen erhalten werden können.On the other hand, extinguishing chambers are known as extinguishing agent on such contact arrangements, which are provided with a plurality of approximately U-shaped and stacked at a mutual distance stacking plates. From their extinguishing effect, the extinguishing chambers are superior to the extinguishing plates. From their construction, however, they are much more expensive and expensive than extinguishing plates, which can be obtained simply as molded ribs in the production of contact protection as a plastic injection molded part without any additional effort.
NH-Sicherungslasttrennschalter, NH-Sicherungslastschaltleisten oder dergleichen Geräte, bei denen Kontaktanordnungen der betrachteten Art zum Einsatz kommen, sind üblicherweise für ein bestimmtes Schaltvermögen nach IEC 60947-3 ausgelegt. Eine normiertes Schaltvermögen ist beispielsweise AC22 bei 690V. Ein anderes normiertes Schaltvermögen ist AC 23 bei 690 V. Wegen der begrenzten Löschwirkung von Löschplatten werden Kontaktanordnungen der eingangs genannten Art in der Praxis nur bis zu dem genannten Schaltvermögen von AC22 eingesetzt. Bei grösseren Schaltvermögen wie dem erwähnten von AC23 kommen Kontaktanordnungen mit Löschkammern zum Einsatz.NH fuse switch disconnectors, NH fuse switch disconnectors or the like Devices in which contact arrangements of the type considered are used are usually designed for a specific switching capacity according to IEC 60947-3. A standardized switching capacity is, for example, AC22 at 690V. Another normalized switching capacity is
Aus der
Durch die Erfindung, wie sie in den Patentansprüchen gekennzeichnet ist, wird eine Kontaktanordnung geschaffen, welche sich in einfacher Weise an die vorstehend erläuterten unterschiedlichen Gegebenheiten durch lediglich bedarfsweises Montieren einer Löschkammer auf den standardmässig vorhandenen Löschplatten anpassen lässt.The invention, as characterized in the claims, a contact arrangement is provided, which can be easily adapted to the above-mentioned different circumstances by merely on-demand mounting a quenching chamber on the standard existing extinguishing plates.
Durch die Erfindung wird die Typenvielfalt an NH-Sicherungslasttrennschaltern, NH-Sicherungslastschaltleisten oder dergleichen reduziert, was sich auch günstig auf die Lagerhaltung auswirkt. Ein weiterer Vorteil der Erfindung ist darin zu sehen, dass die Kombination aus Löschplatten und Löschkammer noch bessere Löscheigenschaften aufweist als die genannten Teile jeweils allein.The invention reduces the variety of types of NH fuse switch disconnectors, NH fuse switch-disconnectors or the like, which also has a favorable effect on the storage. Another advantage of the invention is the fact that the combination of extinguishing plates and quenching chamber even better extinguishing properties than the parts mentioned each alone.
Bevorzugt umfasst die Löschkammer in an sich bekannter Weise ein Isolierstoffgehäuse, in welches die Löschbleche, inbesondere solche von u-förmiger Ausbildung, eingeschoben und darin durch Führungen gehalten sind. Bei aufgesteckter Löschkammer greifen die Löschplatten mit Vorteil zwischen die Schenkel der u-förmigen Löschbleche in der Löschkammer ein. Am Berührungsschutz kann die Löschkammer im aufgesteckten Zustand insbesondere durch eine Schnappverbindung festgelegt werden. Weiter kann zwischen den Löschplatten ein ausbrechbarer Steg und/oder im Berührungsschutz im Aufsteckbereich der Löschkammer eine Ausbrechöffnung vorgesehen sein.Preferably, the quenching chamber comprises, in a manner known per se, an insulating material housing into which the quenching plates, in particular those of a U-shaped design, are inserted and held therein by guides. When the extinguishing chamber is plugged in, the extinguishing plates advantageously engage between the legs of the U-shaped extinguishing plates in the extinguishing chamber. At the contact protection, the extinguishing chamber in the plugged state can be determined in particular by a snap connection. Furthermore, a knock-out opening can be provided between the extinguishing plates and / or a knock-out opening can be provided in the contact protection area in the attachment area of the extinguishing chamber.
Es versteht sich, dass im Rahmen der Erfindung Löschplatten und Löschkammer form- und dimensionmässig aneinander angepasst sein sollten.It is understood that in the invention extinguishing plates and extinguishing chamber should be dimensionally and dimensionally adapted to each other.
Die Eigenschaften der erfindungsgemässen Kontakteinrichtung können weiter auch noch dadurch verbessert werden, dass an der der Kontkattulpe zugewandeten Unterseite der Berührungsschutzes zwei zwischen die Schenkel der Kontakttulpe eingreifende, vorzugsweise etwas federnde Führungsrippen als Einführhilfe für das Sicherungsmesser in die Kontakttulpe vorgesehen sind. Wie die Löschplatten können diese Führungsrippen ohne zusätzlichen Aufwand bei der Ausbildung des Berührungsschutzes als Kunststoffspritzteil durch einfaches Anspritzen mit erhalten werden. Durch die durch die Führungsrippen vermittelte Zentrierung des Sicherungsmessers trifft dieses beim Einschalten praktisch gleichzeitig auf beide Schenkel der Kontakttulpe, wodurch das Kontaktprellen und der damit verbundene Abbrand stark reduziert werden.The properties of the contact device according to the invention can be further improved by providing two, preferably slightly resilient, guide ribs as insertion aids for the safety knife into the contact tulip on the underside of the contact protection facing the Kontkattulpe. As the extinguishing plates, these guide ribs can be obtained without additional effort in the formation of contact protection as a plastic injection molded part by simply spraying. By mediated by the guide ribs centering of the safety knife this hits when switching virtually simultaneously on both legs of the contact tulip, whereby the contact bounce and the associated burnup are greatly reduced.
Gemäss einer anderen bevorzugten Ausführungsform der vorliegenden Erfindung sind an der Kontaktanordnung Mittel angeformt, welche eine gezielte Abführung der beim Öffnen oder Schliessen der NH-Sicherung entstehenden Gase gewährleisten. Werden nämlich die beim Öffnen und/oder Schliessen der NH-Sicherung bei Trennung des Kontakts respektive bei Kontaktschluss entstehenden Gase nicht gezielt von den Kontaktbereichen abgeführt, so besteht ein Risiko, dass infolge der Anwesenheit dieser Gase in hoher Konzentration Kurzschlüsse auftreten. Vorzugsweise führen entsprechend die Mittel die Gase gezielt von den Leiterbereichen der Kontaktanordnung ab. Dies wird erreicht, indem die Gase wenigstens teilweise über eine unmittelbar auf der der NH-Sicherung abgewandten Seite der Kontakttulpe angeordnete obere Abführöffnung und einen damit in Verbindung stehenden Abführkanal aus einem vom Berührungsschutz gebildeten Gehäuse nach oben abgeführt werden. Alternativ oder zusätzlich ist es möglich, die Gase wenigstens teilweise über eine unmittelbar auf der der NH-Sicherung abgewandten Seite der Kontakttulpe angeordnete untere Abführöffnung in ein vom Berührungsschutz gebildetes Gehäuseinneres nach oben abzuführen, wobei dann Belüftungsschlitze entsprechend am Gehäuse angeordnet sind, über welche die Gase aus dem Gehäuseinneren nach aussen austreten können und ev. Mittel angeordnet sind, welche die Gase nicht in den Bereich der Sicherung zurückfliessen lassen.According to another preferred embodiment of the present invention, means are formed on the contact arrangement, which ensure a targeted discharge of the resulting when opening or closing the NH fuse gases. Namely, when the opening and / or closing of the NH fuse when disconnecting the contact or at contact closure resulting gases are not specifically discharged from the contact areas, there is a risk that short circuits occur due to the presence of these gases in high concentration. Preferably, the means selectively deliver the gases from the conductor regions of the contact arrangement. This is achieved by the gases are at least partially removed via an arranged directly on the side facing away from the NH fuse side of the contact tulip upper discharge opening and a related discharge channel from a housing formed by the contact protection upwards. Alternatively or additionally, it is possible to discharge the gases at least partially via a directly on the side facing away from the NH fuse side of the contact tulip lower discharge opening in a housing formed by the contact protection upwards, in which case ventilation slots are correspondingly arranged on the housing, via which the gases can escape from the inside of the housing to the outside and ev. Means are arranged, which do not allow the gases flow back into the area of the fuse.
Konkreter kann eine derartige bevorzugte Ausführungsform realisiert werden, indem an einer Öffnung im Berührungsschutz im wesentlichen unmittelbar auf der der NH-Sicherung abgewandten Seite der Löschplatten wenigstens ein Abführkanal nach innen (d. h. in Richtung des Gehäuseinneren) angeformt ist, welcher mit dem Gehäuseinneren in Richtung der Kontakttulpe über eine obere Abführöffnung in Verbindung steht. Dieser Abführkanal verfügt bevorzugt über zwei Seitenwände (insbesondere im wesentlichen senkrecht zur vorderen Abdeckung des Gehäuses) sowie über einen horizontalen Boden, und weist weiterhin bevorzugt auf der der NH-Sicherung abgewandten Seite einen nach oben hin gekrümmten Boden auf. Diese Krümmung dient dazu, die üblicherweise explosionsartig beim Öffnen entstehenden Gase gezielt nicht nur nach oben abzuführen, sondern dass die Gase ausserdem kontrolliert und möglichst effizient von der gesamten Kontaktanordnung abgeführt werden, indem sie zusätzlich nach vorne geleitet werden. Zur Stabilisierung dieser Konstruktion ist insbesondere bevorzugt zwischen den Löschplatten wenigstens ein Längssteg angeordnet, welcher sich wenigstens bis zum horizontalen Boden des Abführkanals erstreckt, d. h. der sich zunächst im Spalt zwischen den beiden Löschplatten und anschliessend in der oberen Abführöffnung erstreckt (der Spalt zwischen den beiden Löschplatten und die Abführöffnung sind nicht voneinander getrennt, sondern bilden eine grosse Öffnung). Die Abführung der heissen Gase aus dem Gehäuse kann noch besser kontrolliert werden, indem weiterhin im Gehäuseinneren auf der der NH-Sicherung abgewandten Seite der Kontakttulpe eine vertikale innere Trennwand (im wesentlichen senkrecht zur Ebene der Kontakttulpe angeordnet ist, und indem diese vertikale innere Trennwand eine Aussparung aufweist, deren oberer Teil die obere Abführöffnung bildet, und deren unterer Teil eine untere Abführöffnung bildet, wobei sich bevorzugt der wenigstens eine Längssteg auch über die untere Abführöffnung erstreckt, und wobei insbesondere bevorzugt zusätzliche seitliche Längsstege im wesentlichen parallel zum wenigstens einen Längssteg in der Aussparung angeordnet sind. Diese zusätzlichen Stege dienen insbesondere dem Berührungsschutz.
Weitere bevorzugte Ausführungsformen der vorliegenden Erfindung sind in den abhängigen Ansprüchen beschrieben.More specifically, such a preferred embodiment can be realized by at least one discharge channel to the inside (ie in the direction of the housing interior) is integrally formed at an opening in the contact protection substantially directly on the side facing away from the NH fuse side of the extinguishing plates, which with the housing interior in the direction of Contact tulip is connected via an upper discharge opening. This discharge channel preferably has two side walls (in particular substantially perpendicular to the front cover of the housing) and a horizontal bottom, and further preferably has on the side facing away from the NH fuse on a curved bottom upwards. This curvature serves to deliberately not only remove the gases which normally explode explosively during the opening upwards, but also to control the gases and remove them from the entire contact arrangement as efficiently as possible by additionally guiding them forwards. To stabilize this construction, at least one longitudinal web is particularly preferably arranged between the extinguishing plates, which extends at least to the horizontal bottom of the discharge channel, ie which first extends in the gap between the two extinguishing plates and then in the upper discharge opening (the gap between the two extinguishing plates and the discharge opening are not separated from each other, but form a large opening). The removal of the hot gases from the housing can be even better controlled by further inside the housing on the side facing away from the NH fuse side of the contact tulip, a vertical inner partition (is arranged substantially perpendicular to the plane of the contact tulip, and by this vertical inner partition a Recess has, whose upper part forms the upper discharge opening, and whose lower part forms a lower discharge opening, wherein preferably the at least one longitudinal web also extends over the lower discharge opening, and particularly preferably additional lateral longitudinal webs substantially parallel to at least one longitudinal web in the The additional webs serve in particular for protection against contact.
Further preferred embodiments of the present invention are described in the dependent claims.
Die Erfindung soll nachfolgend anhand von Ausführungsbeispielen im Zusammenhang mit der Zeichnung näher erläutert werden. Es zeigen:
- Fig. 1
- in einer quer geschnittenen Teildarstellung (Schnitt A-A in
Fig. 5 ) einen NH-Sicherungslasttrennschalter nach der Erfindung mit aufgesteckter Löschkammer; - Fig. 2
- in gleicher Darstellung den NH-Sicherungslasttrennschalter ohne die Löschkammer;
- Fig. 3
- den NH-Sicherungslasttrennschalter in einer längs geschnittenen Teildarstellung (Schnitt B-B in
Fig. 5 ); - Fig. 4
- in gleicher Darstellung den NH-Sicherungslasttrennschalter ohne die Löschkammer;
- Fig. 5
- eine perspektivische Teildarstellung des NH-Sicherungslasttrennschalters mit aufgesteckter Löschkammer;
- Fig.6
- in gleicher Darstellung den NH-Sicherungslasttrennschalter, wobei die Löschkammer separat und getrennt nach ihren Teilen dargestellt ist;
- Fig. 7
- a) ein zweites Ausführungsbeispiel eines NH- Sicherungslasttrennschalters ohne aufgesetzte Löschkammer von hinten in perspektivischer Ansicht; b) das zweite Ausführungsbeispiel mit aufgesetzter Löschkammer von hinten in perspektivischer Ansicht;
- Fig. 8
- a) das zweite Ausführungsbeispiel gem.
Fig. 7a ) von vorn in perspektivischer Ansicht; b) das zweite Ausführungsbeispiel gem.Fig. 7b ) von vorn in perspektivischer Ansicht; - Fig. 9
- a) das zweite Ausführungsbeispiel gem.
Fig. 7a ) in einem Schnitt parallel zum Sicherungsmesser; b) das zweite Ausführungsbeispiel gem.Fig. 7b ) in einem Schnitt parallel zum Sicherungsmesser; und - Fig. 10
- a) einen perspektivischen Einblick von unten in das offene Gehäuse des zweiten Ausführungsbeispiels aus der Richtung der Sicherung ; b) einen weiteren perspektivischen Einblick von unten in das offene Gehäuse des zweiten Ausführungsbeispiels zur Sicherung.
- Fig. 1
- in a cross-sectioned partial representation (section AA in
Fig. 5 ) an NH fuse switch disconnector according to the invention with plugged-on quenching chamber; - Fig. 2
- in the same representation the NH fuse switch disconnector without the quenching chamber;
- Fig. 3
- the NH fuse switch disconnectors in a longitudinal sectional partial view (section BB in
Fig. 5 ); - Fig. 4
- in the same representation the NH fuse switch disconnector without the quenching chamber;
- Fig. 5
- a partial perspective view of the NH fuse switch-disconnector with plugged extinguishing chamber;
- Figure 6
- in the same representation, the NH fuse switch-disconnector, the quenching chamber is shown separately and separated according to their parts;
- Fig. 7
- a) a second embodiment of a NH fuse switch disconnectors without patch extinguishing chamber from behind in a perspective view; b) the second embodiment with attached extinguishing chamber from behind in a perspective view;
- Fig. 8
- a) the second embodiment according to.
Fig. 7a ) from the front in perspective view; b) the second embodiment according to.Fig. 7b ) from the front in perspective view; - Fig. 9
- a) the second embodiment according to.
Fig. 7a ) in a section parallel to the safety knife; b) the second embodiment according to.Fig. 7b ) in a section parallel to the safety knife; and - Fig. 10
- a) a perspective view from below into the open housing of the second embodiment from the direction of the fuse; b) another perspective view from below into the open housing of the second embodiment for securing.
Sämtliche Figuren zeigen denselben, jeweils jedoch nur teilweise dargestellten und mit 1 bezeichneten NH-Sicherungslasttrennschalter. Dieser kann grundsätzlich einpolig, jedoch auch mehrpolig ausgebildet sein. In den
Wie besonders in den
Mit 5 ist ein Berührungsschutz bezeichnet, der den Bereich der Kontakttulpe 2 gegen den Benutzer hin (in den Figuren jeweils nach oben) abdeckt. Er ist einteilig und spritztechnisch aus einem Kunststoff-Isoliermaterial wie z.B. Polyamid hergestellt. Direkt oberhalb der Kontakttulpe 2 ist in dem Berührungsschutz 5 eine Durchführungsöffnung 6 freigelassen, durch welche hindurch das Sicherungsmesser 4 zum Ein- und Ausschalten des NH-Sicherungslasttrennschalters durchführbar ist. Wie bereits erwähnt, ist die NH-Sicherung 4 üblicherweise an einem hier nicht dargestellten Schaltdeckel befestigt, welcher häufig auch noch schwenkbar angelegt ist. In diesem Fall lässt sich die NH-Sicherung zusammen mit dem Schaltdeckel um dessen Anlenkachse herum schwenken, wie dies durch die Pfeile in den
Um den beim Ausschalten , d.h. beim Herausziehen des Sicherungsmessers 4 aus der Kontakttulpe 2 unter Last zwischen dem Sicherungsmesser 4 und der Kontakttulpe 2 entstehenden Lichtbogen wirksam zu löschen ist der NH-Sicherungslasttrennschalter 1 zum einen mit zwei Löschplatten 7 versehen. Zum anderen kann zusätzlich auf den Löschplatten 7 bei Bedarf eine Löschkammer 8 montiert werden.To switch off when switching off, i. When removing the
Die Löschplatten 7 sind als hochstehende schmale Rippen beidseitig und entlang der Durchschwenköffnung 6 an dem Berührungsschutz spritztechnisch angeformt. An ihrer in den
Bei Schaltvermögen bis AC 22 bei 690 V genügen in der Regel die Löschplatten 7 als Löschmittel für den Lichtbogen. Um höhere Schaltvermögen wie z.B. AC 23 bei 690 zu erreichen, ist im Rahmen der Erfindung vorgesehen, zusätzlich die bereits erwähnte Löschkammer 8 auf den Löschplatten 7 zu montieren. Die Montage erfolgt dabei durch einfaches Aufstecken.With switching capacity up to
Wie besonders in
Wenn die Löschkammer 8 auf die Löschplatten 7 aufgesteckt ist, greifen die beiden Löschplatten 7 zwischen die u-fömigen Löschbleche 10 in der Löschkammer 8 ein und decken deren u-Schenkel beiseitig ab. Andererseits ist es jedoch vorgesehen, den erwähnten Längsteg 7.2 zwischen den Löschplatten 7 vor dem Aufstecken der Löschkammer 8 auszubrechen, um den hinteren Verbindungsbereich der Bleche zwischen ihren u-Schenkeln weiter freizulegen. Der Verbindungssteg 7.2 wird dazu mit Vorteil mit entsprechend geeigneten Sollbruchstellen versehen. Ebenso ist es vorgesehen, einen Bereich des Berührungsschutzes 5, welcher bei aufgesteckter Löschkammer 8 unterhalb des hinteren Verbindungsbereichs der Löschbleche zu liegen kommt, als Ausbrechöffnung 14 auszubilden und vor dem Aufstecken der Löschkammer 8 auszubrechen.When the quenching
In den
Ein weiteres Ausführungsbeispiel zur vorliegenden Erfindung ist in den
In
Die entsprechende
Zur abschliessenden Illustration der Anordnung von Abführkanal 16, vertikaler innerer Trennwand 25 respektive insbesondere der unteren Abführöffnung 27, sind in den
- 11
- NH-SicherungslasttrennschalterNH fuse switch disconnectors
- 22
- KontakttulpeContact tulip
- 2.1, 2.22.1, 2.2
- Kontaktarme der KontakttulpeContact arms of the contact tulip
- 33
- NH-SicherungNH fuse
- 44
- Sicherungsmesserfuse knife
- 55
- Berührungsschutzcontact protection
- 66
- Durchführungsöffnung im BerührungsschutzPassage opening in the contact protection
- 77
- Löschplattenextinguishing plates
- 7.17.1
- Quersteg zwischen den LöschplattenCrosspiece between the extinguishing plates
- 7.27.2
- Längssteg zwischen den LöschplattenLongitudinal ridge between the extinguishing plates
- 88th
- Löschkammerextinguishing chamber
- 99
- LöschkammergehäuseExtinguishing chamber housing
- 1010
- Löschblechesplitters
- 1111
- Führungen für Löschbleche im LöschkammergehäuseGuides for quenching plates in the quenching chamber housing
- 1212
- Schnapphakensnap hooks
- 1313
- Einschnappöffnungen im BerührungsschutzSnap openings in the contact protection
- 1414
- Ausbrechöffnung im BerührungsschutzKnock-out opening in the contact protection
- 1515
- Führungsrippenguide ribs
- 1616
- Abführkanaldischarge channel
- 1717
- flacher Boden von 16flat bottom of 16
- 1818
- Seitenwand von 16Sidewall of 16
- 1919
-
seitliche Längsstege in Abführöffnung 26/27lateral longitudinal webs in
discharge opening 26/27 - 2020
- gekrümmter Boden von 16curved bottom of 16
- 2121
- Belüftungsschlitze in 5Ventilation slots in 5
- 2222
- Belüftungsschlitze in oberer/unterer Seitenwand von GehäuseVentilation slots in upper / lower side wall of housing
- 2323
- Trennwand zwischen SicherungsbereichenPartition wall between security areas
- 2424
- Belüftungsschlitze in 9Ventilation slots in 9
- 2525
- vertikale innere Trennwandvertical inner partition
- 2626
- obere Abführöffnungupper discharge opening
- 2727
- untere Abführöffnunglower discharge opening
- 2828
- Gehäuseinnereshousing interior
Claims (11)
- Contact arrangement for low-voltage high-breaking-capacity fuse switch disconnectors (1), low-voltage high-breaking-capacity fuse switch disconnector blocks or the like comprising a contact tulip (2) for receiving a blade (4) of a low-voltage high-breaking-capacity fuse (3), and comprising a direct-contact protection means (5) for the contact tulip (2), which direct-contact protection means is provided with an opening (6) for the fuse blade (4) to pass through, wherein the quenching means (5) provided is a quenching chamber (8), wherein the quenching chamber (8) is provided with arc splitter stacks (10), characterized in that the direct-contact protection means adjoining the said opening (6) is provided with integrally formed quenching plates (7) as arc-quenching means, and in that, in addition to the quenching plates (7), the quenching chamber (8) which can be fitted on the said quenching plates (7) is provided.
- Contact arrangement according to Claim 1, characterized in that the quenching chamber (8) comprises an insulating material housing (9) into which the arc splitter stacks (10) are inserted and held by guides (11).
- Contact arrangement according to either of the preceding claims, characterized in that the arc splitter stacks (10) are approximately u-shaped, and in that the quenching plates (7) engage in the quenching chamber (8), between the limbs of the u-shaped arc splitter stacks (10), when the quenching chamber (8) is mounted.
- Contact arrangement according to one of Claims 1-3, characterized in that a web (7.2) which can be knocked out is provided between the quenching plates (7), wherein a transverse web (7.1) is preferably arranged substantially at the upper edge of the quenching plates (7) and connects the quenching plates (7) to one another and on which the web (7.2) which can be knocked out is particularly preferably integrally formed by way of its upper end.
- Contact arrangement according to one of Claims 1-4, characterized in that a knock-out opening (14) is provided in the direct-contact protection means (5) in the region in which the quenching chamber (8) is fitted.
- Contact arrangement according to one of Claims 1-5, characterized in that the quenching chamber (8) can be fixed to the direct-contact protection means (5) in the mounted state, preferably by a snap-action connection (12, 13).
- Contact arrangement according to one of Claims 1-6, characterized in that two guide ribs (15), which engage between the limbs (2.1, 2.2) of the contact tulip (2), are provided on the lower side, which faces the contact tulip (2), of the direct-contact protection means (5) to aid insertion of the fuse blade (4) into the contact tulip (2).
- Contact arrangement according to one of the preceding claims, characterized in that means (16, 17, 18, 20, 25, 26, 27) are arranged, the said means ensuring targeted discharge of the gases which are produced when the low-voltage high-breaking-capacity fuse (3) is opened or closed.
- Contact arrangement according to Claim 8, characterized in that the means (16, 17, 18, 20, 25, 26, 27) discharge the gases from the contact regions of the low-voltage high-breaking-capacity fuse (3) in a targeted manner by the gases being discharged at the top from a housing which is formed by the direct-contact protection means (5) at least partially by means of an upper discharge opening (26), which is arranged directly on that side of the contact tulip (2) which is averted from the low-voltage high-breaking-capacity fuse (3), and by means of a discharge channel (16) which is connected to the said discharge opening, and/or being discharged at the top into a housing interior (28), which is formed by the direct-contact protection means (5), at least partially by means of a lower discharge opening (27) which is arranged directly on that side of the contact tulip (2) which is averted from the low-voltage high-breaking-capacity fuse (3), wherein ventilation slots (21, 22) are arranged, it being possible for the gases to exit from the housing interior (28) to the outside via the said ventilation slots.
- Contact arrangement according to either of Claims 8 and 9, characterized in that at least one discharge channel (16) toward the inside is integrally formed at an opening from the direct-contact protection means (5) directly on that side of the quenching plates (7) which is averted from the low-voltage high-breaking-capacity fuse (3), the said discharge channel being connected to the housing interior (28) in the direction of the contact tulip (2) by means of an upper discharge opening (26), having two side walls (18) and also a flat base (17), and preferably having a base (20) which is curved in the upward direction on that side which is averted from the low-voltage high-breaking-capacity fuse (3), wherein at least one longitudinal web (7.2) which extends at least as far as the horizontal base (17) of the discharge channel (16) is particularly preferably arranged between the quenching plates (7).
- Contact arrangement according to Claim 10, characterized in that furthermore a vertical inner separating wall (25) is arranged substantially perpendicular to the plane of the contact tulip (2) in the housing interior (28) on that side of the contact tulip (2) which is averted from the low-voltage high-breaking-capacity fuse (3), and in that this vertical inner separating wall (25) has a cutout, the upper part of the said cutout forming the upper discharge opening (26), and the lower part of the said cutout forming a lower discharge opening (27), wherein the at least one longitudinal web (7.2) preferably also extends across the lower discharge opening (27), and wherein additional lateral longitudinal webs (19) are particularly preferably arranged in the cutout substantially parallel to the at least one longitudinal web (7.2).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH18752001 | 2001-10-11 | ||
CH18752001 | 2001-10-11 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1302957A1 EP1302957A1 (en) | 2003-04-16 |
EP1302957A8 EP1302957A8 (en) | 2007-03-07 |
EP1302957B1 true EP1302957B1 (en) | 2014-01-22 |
Family
ID=4566616
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20020022180 Expired - Lifetime EP1302957B1 (en) | 2001-10-11 | 2002-10-04 | Low-voltage high-power contact arrangement |
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EP (1) | EP1302957B1 (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE20316027U1 (en) * | 2003-10-18 | 2004-01-15 | Moeller Gmbh | Electrical switching device with device for arc extinguishing |
EP1903589B1 (en) | 2006-09-21 | 2014-10-01 | Siemens Aktiengesellschaft | Safety circuit breaker with light arc chamber |
DE102007044390B3 (en) * | 2007-09-18 | 2009-02-26 | Wöhner GmbH & Co. KG Elektrotechnische Systeme | Fuse switch disconnector with double contact protection for changeable connection direction |
PL2913835T6 (en) * | 2014-02-26 | 2022-05-30 | Wöhner Besitz Gmbh | Safety circuit breaker strip for low-voltage high-power fuses |
CN105374591B (en) * | 2015-11-11 | 2017-12-12 | 德力西集团有限公司 | Fuse disconnecting switch |
RU179395U1 (en) * | 2017-08-24 | 2018-05-14 | Закрытое акционерное общество "Чебоксарский электроаппаратный завод" | ARCAMENT CAMERA WITH DEION LATTICE |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1799775U (en) * | 1959-09-05 | 1959-11-12 | Wickmann Werke Ag | FUSE DISCONNECTORS WITH TOUCH PROTECTION FOR LOAD DISCONNECTION. |
DE1168530B (en) * | 1962-06-28 | 1964-04-23 | Siemens Ag | Switching chamber, especially for fuse disconnectors |
DE1199361B (en) * | 1963-01-26 | 1965-08-26 | Albrecht Jung G M B H | Protective cover for the fixed contacts of knife switches, especially fuse disconnectors |
DE1899474U (en) * | 1964-05-22 | 1964-08-27 | Leopold Neu | MULTI-PART FUSE PART, IN PARTICULAR FOR FUSE DISCONNECTORS AND FUSE DISCONNECTORS. |
DE1301383B (en) | 1966-06-16 | 1969-08-21 | Schneider Schaltgeraete | Knife disconnectors, especially fuse disconnectors, with protective covers |
BE794287A (en) * | 1972-02-07 | 1973-05-16 | Krone Gmbh | EXTINGUISHING DEVICE FOR LOW-VOLTAGE CIRCUIT-BREAKER BASES |
DE3019925C2 (en) * | 1980-05-24 | 1982-09-02 | Albrecht Jung Gmbh, 7965 Ostrach | NH fuse disconnectors and load switches |
DE3119957A1 (en) * | 1981-05-20 | 1982-12-23 | Karl Pfisterer Elektrotechnische Spezialartikel Gmbh & Co Kg, 7000 Stuttgart | Circuit connecting block for holding low-voltage hrc fuses |
DE9208693U1 (en) * | 1992-06-29 | 1993-10-28 | Siemens AG, 80333 München | Fuse disconnector |
DE29721438U1 (en) * | 1997-12-04 | 1998-04-30 | Wöhner GmbH & Co. KG Elektrotechnische Systeme, 96472 Rödental | Contact device, in particular NH contact device, for fuse switch disconnectors or the like. |
-
2002
- 2002-10-04 EP EP20020022180 patent/EP1302957B1/en not_active Expired - Lifetime
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EP1302957A8 (en) | 2007-03-07 |
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