EP0844632A2 - Kontaktanordnung für Fehlerstromschutzschalter - Google Patents
Kontaktanordnung für Fehlerstromschutzschalter Download PDFInfo
- Publication number
- EP0844632A2 EP0844632A2 EP97112772A EP97112772A EP0844632A2 EP 0844632 A2 EP0844632 A2 EP 0844632A2 EP 97112772 A EP97112772 A EP 97112772A EP 97112772 A EP97112772 A EP 97112772A EP 0844632 A2 EP0844632 A2 EP 0844632A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- contact
- magnet
- contacts
- arc
- arrangement according
- 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.)
- Ceased
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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
- H01H9/44—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet
- H01H9/443—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet using permanent magnets
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H83/00—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
- H01H83/02—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by earth fault currents
Definitions
- the invention relates to a contact arrangement for residual current circuit breakers, especially for AC / DC sensitive residual current circuit breakers.
- Residual current circuit breakers are highly sensitive protective devices the a ground fault current flowing in the event of a fault Detect a few mA, evaluate this earth fault current and use a trip device interrupt the circuit at risk.
- Figure 1 shows a schematic representation of a known Residual current circuit breaker with a summation current transformer, whose primary winding by a phase conductor and Neutral conductor is formed. The residual current circuit breaker detects for example one in a mass connection over the Protective conductor to the current flowing to earth and disconnects it monitoring circuit 5 from the network.
- the circuit to be monitored is interrupted in the common AC and three-phase networks on simple Way by separating the contacts, being an emerging Switching arc within 10 ms at the zero point of the applied Current sine wave goes out.
- Residual current circuit breakers are also called zero point extinguishers.
- Residual current circuit breakers used in DC networks cannot take advantage of the effect of zero point deletion, which is why the arc does not automatically due to the zero crossing the current sine wave goes out.
- opening the Switching contacts i.e. when moving the movable Switching contact from the fixed contact arises between the two Contacts an arc column.
- the arc base of the Arc are on the moving contacts and over which a current initially continues to flow.
- the one about the Arc flowing direct current creates its own magnetic field, which is sufficient at high direct currents, the arc base points to move away from the opening contacts.
- At small direct currents is the strength of the direct current generated magnetic blowing field, however, is not sufficient to the arc base points of the resulting arc from the to move away from opening contacts. An extinction of the The arc is then not reached and the contacts can be destroyed.
- the current-carrying contact has a U-shaped course, which quickly drives the arc which arises during the shutdown by blowing action away from the contact zone into the quenching chamber, so that the arc in extinguishing the stack of quenching sheets.
- a further circuit breaker with a fixed contact and a movable contact is described in EP 0 567 614 B1.
- the circuit breaker has a magnet that contains a large number of steel sheets that are encapsulated with a thermoplastic material.
- the magnet has an opening in which the movable contact and the fixed contacts of the line switch are attached.
- the overmolded magnet that surrounds the contacts reinforces this effect and ensures that the circuit breaker quickly interrupts the current. This creates an arc between the movable contact and the fixed contact when the contacts open.
- Figure 1 shows a known residual current circuit breaker a summation current transformer 1, the primary winding through a Phase conductor 2 and a neutral conductor 3 is formed.
- a Secondary winding 4 in which when a fault current occurs a voltage is induced, an error occurs in the monitoring circuit 5 detected.
- a control circuit 6 detects via leads 7, 8 in the secondary winding 4 in Fault induced voltage and controls via lines 9, 10 a downstream relay 11 of the release device such that with the relay 11 mechanically connected switches 12, 13 in the lines 2, 3 are opened.
- the switches 12, 13 have each have a movable contact 12a, 13a and a fixed contact 12b, 13b.
- FIG. 2 shows a contact arrangement for a residual current circuit breaker of the type described above with a movable Contact and a fixed contact according to the invention.
- the same reference numerals designate the same components.
- a Terminal 14 in which a screw 15 for connecting a The conductor, not shown, can be screwed in, points laterally a supply bracket 16, which with the through the screw 15th pinched conductor is electrically connected.
- the supply bracket 16 has for easy insertion into a housing an extension 17 angled rectangularly to the rear and an arched protruding at an obtuse angle End section 18.
- the end section 18 is with a bearing 19 provided in which a movable contact lever 20th is pivotally mounted.
- the supply bracket 16 has essentially U-shaped profile, of which the central section is the end section 18 protrudes towards a mating contact. Of the End section 18 is bent approximately V-shaped upwards at its end and thus defines the bearing 19 for the movable Contact lever 20.
- the movable contact lever 20 preferably has an approximately S-shaped course, so that one of the Bearing 19 distal end portion 25 of the Terminal 14 is spaced further than that designated 20 Contact lever. At the end portion 25 of the contact lever 20, a contact contact portion 21 is arranged.
- the movable contact lever 20 with a contact contact portion 21 together form the movable one shown symbolically in FIG Switch contact 12a or 13a.
- the contact touch section 21 of the movable contact is in the closed State of the contact arrangement, as can be seen in FIG. 2, to a contact contact portion 22 of the fixed contact.
- the contact contact section 22 of the fixed contact is laterally on a first leg 23 of a substantially U-shaped Attached to the ladder.
- the U-shaped conductor is through two in substantially parallel legs 23, 24 are formed, which via a conductor center section oriented vertically to the legs 25 are connected. The distance between the two legs 23, 24 is sufficient to hold a magnet 26.
- the U-shaped conductor consists of the two legs 23, 24 and the middle section 25.
- the contact contact section 21 arranged on the leg 23 forms the fixed contact with the U-shaped conductor Contact arrangement, symbolic in Figure 1 with the reference numeral 12b or 13b.
- the magnet 26 is preferably exactly in the U-shaped conductor of the fixed contact.
- the magnet is therefore preferably seated 26 in the through the legs 23, 24 and the middle section 25 formed space and lies on the central section 25 on.
- the magnet 26 is thus as close as possible the contact surface of the two contact contact sections 21, 22.
- the magnet 26 is preferably a Permanent magnets.
- the U-shaped conductor of the fixed contact is as shown in Figure 2 on the distant from the central portion 25 End of the leg 24 connected to a feed line 27.
- the end of the leg 23 slightly bent, in the direction of the contact lever 20.
- the bent section of the leg 23 is designated 23a.
- the Lines of force of the magnetic field generated by the magnet 26 therefore run essentially perpendicular to one when opening arcing of the contacts.
- This external and through the magnetic field caused by the magnet 26 is superimposed on the Natural magnetic field of the current flowing over the arc and results in an overall stronger magnetic field.
- the strength of through the current and magnets 26 caused magnetic field is sufficient to the arc base points even at low direct currents of the arc from the contact contact portions which are spaced apart from each other 21, 22 to move away and the arc to quickly go out.
- the contact lever 20 via the bearing 19 as a fulcrum between the supply bracket 16 and the leg 23 is pivotable for the purpose the opening or closing of those shown in FIG Contact arrangement.
- the leg 23 is approximately at the level of Section 25 and extends upwards over the connecting section 25 around the magnet 26 and through the leg 24 back down to the section representing the feed line 27.
- FIG. 3 shows the contact arrangement shown in FIG Top view.
- the direction of polarization of the magnet 26 lies according to Figure 3 parallel to the contact surface of the two contact contact sections 21, 22.
- the lines of force of the through the magnet 26 caused magnetic field run perpendicular to the arcing when opening the contacts. This Magnetic blowing field ensures that the current-carrying arc even with smooth direct currents low strength.
- Figure 4 shows a further embodiment of the invention Contact arrangement in side view.
- this contact arrangement is the terminal 14 with the screw 15 on one approximately U-shaped conductor with two legs 23, 24 and one Middle section 25 attached.
- a Magnet 26 used in the U-shaped conductor.
- On the leg 23 of the U-shaped conductor there is the contact contact section 22 of the fixed contact, on which, in the closed partial state, the contact contact section 21 of the movable contact is present.
- the contact touch section 21 is on the symbolically shown movable contact lever 20 is provided.
- Figure 4 is the essentially U-shaped conductors around the magnet 26, that of the leg 24 through the section 25 and the leg 23 an electrical connection to a spark extinguishing chamber 28 is produced.
- FIG. 5 shows the embodiment of FIG contact arrangement according to the invention from the arrows 30, 31 direction indicated in Figure 4. Through the dashed line are the lines of force of the one caused by the magnet 26 Magnetic field indicated, which is parallel to the contact surface of the two contact contact sections 21, 22 extend.
- a magnet is provided on the movable contact lever 20, the The direction of polarization is also essentially parallel to the contact surface of the contact contact portions. This will further enhance the magnetic Blasfeldes reached.
- the blowing field caused externally by the magnets 26 enables it is suitable for direct current with the same contact openings to reach.
- the contact arrangement according to the invention thus guarantees a safe and quick extinction of the Arc even with smooth direct currents with lower Strength.
Landscapes
- Breakers (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
- Emergency Protection Circuit Devices (AREA)
- Keying Circuit Devices (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
Description
Ein weiterer Leitungsschutzschalter mit einem Festkontakt und einem beweglichen Kontakt ist in der EP 0 567 614 B1 beschrieben. Der Leitungsschutzschalter weist einen Magneten auf, der eine Vielzahl von Stahlblechen enthält, die mit einem thermoplastischen Material umspritzt sind. Der Magnet besitzt eine Öffnung, in die der bewegliche Kontakt und der Festkontakte des Leitungsschalters angebracht sind. Wenn der Strom durch den Leitungsschutzschalter eine gewisse Stärke erreicht, bewirkt die auftretende elektromagnetische Kraft ein schnelles Öffnen der Kontakte. Der umspritzte Magnet, welcher die Kontakte umgibt, verstärkt diese Wirkung und gewährleistet, daß der Leitungsschutzschalter den Strom schnell unterbricht. Hierbei entsteht ein Lichtbogen zwischen dem bewegbaren Kontakt und dem Festkontakt beim Öffnen der Kontakte.
- Figur 1
- den Aufbau eines bekannten Fehlerstromschutzschalters,
- Figur 2
- eine Kontaktanordnung für einen Fehlerstromschutzschalter in Seitenansicht,
- Figur 3
- eine Ansicht der Kontaktanordnung nach Figur 2 in Draufsicht;
- Figur 4
- eine weitere Ausführungsform der erfindungsgemäßen Kontaktanordnung in Seitenansicht;
- Figur 5
- die in Figur 4 gezeigte Kontaktanordnung von vorne.
Claims (9)
- Kontaktanordnung für Fehlerstromschutzschalter mit einem beweglichen Kontakt und einem Festkontakt, die jeweils einen Kontaktberührungsabschnitt (21, 22) aufweisen, und bei der mindestens an einem der Kontakte ein Magnet (26) angeordnet ist, dessen Polarisierungsrichtung im wesentlichen parallel zu der Berührungsfläche der beiden Kontaktberührungsabschnitte (21, 22) liegt.
- Kontaktanordnung nach Anspruch 1,
dadurch gekennzeichnet,daß der Magnet (26) ein Permanentmagnet ist. - Kontaktanordnung nach Anspruch 1 oder 2,
dadurch gekennzeichnet,daß der Magnet (26) an dem Festkontakt angebracht ist. - Kontaktanordnung nach einem der vorangehenden Ansprüche,
dadurch gekennzeichnet,daß einer der Kontakte im wesentlichen U-förmig ausgebildet ist und daß der Magnet (26) zwischen die Schenkel (23, 24) des im wesentlichen U-förmigen Kontaktes eingesetzt ist. - Kontaktanordnung nach einem der vorangehenden Ansprüche,
dadurch gekennzeichnet,daß der Festkontakt an eine Löschkammer (28) angebracht ist. - Kontaktanordnung nach einem der vorangehenden Ansprüche,
dadurch gekennzeichnet,daß der Magnet (26) an einem Mittelabschnitt (25) des etwa U-förmigen Kontaktes anliegt. - Kontaktanordnung nach einem der vorangehenden Ansprüche,
dadurch gekennzeichnet,daß die Polarisierungsrichtung des Magneten (26) im wesentlichen senkrecht zu einem beim Öffnen der Kontakte entstehenden Lichtbogen ist. - Fehlerstromschutzschalter miteinem Summenstromwandler (1) zur Erfassung von Fehlerströmen in einem zu überwachenden Stromkreis (5),einer Steuerschaltung (6), welche bei Fehlerstromerfassung durch den Summenstromwandler (1) eine Auslöseschalteinrichtung (11) zum Öffnen von mindestens einem Schalter (12, 13) veranlaßt
dadurch gekennzeichnet,daß der Schalter (12, 13) eine aus einem beweglichen Kontakt und einem Festkontakt bestehende Kontaktanordnung aufweist, daß der bewegliche und der Festkontakt jeweils einen Kontaktberührungsabschnitt (21, 22) besitzen und an mindestens einem der Kontakte ein Magnet (26) angeordnet ist, dessen Polarisierungsrichtung im wesentlichen parallel zu der Berührungsfläche der Kontaktberührungsabschnitte (21, 22) ist. - Kontaktanordnung nach Anspruch 8,
dadurch gekennzeichnet,daß der bewegliche Kontakt oder der Festkontakt einen im wesentlichen U-förmigen Abschnitt (23, 24, 25) festlegt, in welchem der Magnet (26) eingesetzt ist.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE29620519U DE29620519U1 (de) | 1996-11-25 | 1996-11-25 | Kontaktanordnung für Fehlerstromschutzschalter |
| DE29620519U | 1996-11-25 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0844632A2 true EP0844632A2 (de) | 1998-05-27 |
| EP0844632A3 EP0844632A3 (de) | 1999-04-21 |
Family
ID=8032445
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP97112772A Ceased EP0844632A3 (de) | 1996-11-25 | 1997-07-24 | Kontaktanordnung für Fehlerstromschutzschalter |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP0844632A3 (de) |
| DE (1) | DE29620519U1 (de) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019175042A1 (de) * | 2018-03-16 | 2019-09-19 | Ellenberger & Poensgen Gmbh | Schutzschalter zur trennung eines stromkreises |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6042756B2 (ja) * | 2013-03-21 | 2016-12-14 | 株式会社日立産機システム | 回路遮断器 |
| DE102014002161B4 (de) * | 2014-02-19 | 2022-02-17 | Abb Schweiz Ag | Schaltkammerbaugruppe mit Festkontaktträger und mehrpoliges Installationsschaltgerätmit einer derartigen Schaltkammerbaugruppe |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2611059A (en) * | 1950-07-07 | 1952-09-16 | Westinghouse Electric Corp | Electric switch with permanentmagnet blowout field |
| FR2204872B1 (de) * | 1972-10-30 | 1976-08-20 | Legrand Sa | |
| DE3337562A1 (de) * | 1983-10-15 | 1985-04-25 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Loescheinrichtung fuer einen leitungsschutzschalter |
| DE3347042A1 (de) * | 1983-12-24 | 1985-07-04 | Brown, Boveri & Cie Ag, 6800 Mannheim | Lichtbogenloeschanordnunng |
| DE3446765A1 (de) * | 1984-12-21 | 1986-07-10 | Schupa Elektro GmbH + Co KG, 5885 Schalksmühle | Kontaktsystem zur begrenzung der lichtbogenlaenge in einem fehlerstromschutzschalter |
| DE3531040C1 (de) * | 1985-08-30 | 1987-06-04 | Licentia Gmbh | Loescheinrichtung fuer einen Allstrom-Leitungsschutzschalter |
| DE8807222U1 (de) * | 1988-06-03 | 1989-10-05 | Klöckner-Moeller Elektrizitätsgesellschaft mbH, 5300 Bonn | Stromunterbrecher mit Lichtbogenbegrenzungseinrichtung |
| US4835502A (en) * | 1988-09-13 | 1989-05-30 | Potter & Brumfield, Inc. | Secure magnet blowout mounting for relays |
| DE3915127C1 (de) * | 1989-05-09 | 1990-09-06 | Flohr, Peter, Dipl.-Ing., 7790 Messkirch, De | |
| DE4011336A1 (de) * | 1990-04-07 | 1991-10-10 | Felten & Guilleaume Energie | Fehlerstromschutzschalter in modulbauweise |
| US5223681A (en) * | 1991-10-18 | 1993-06-29 | Square D Company | Current limiting circuit breaker with over-molded magnet and metal plates |
| DE4243249A1 (de) * | 1992-12-19 | 1994-06-23 | Abb Patent Gmbh | Elektrischer Schalter |
| DE4339425B4 (de) * | 1993-11-18 | 2005-11-10 | Heinrich Kopp Ag | Schaltschloß für einen Fehlerstromschutzschalter |
-
1996
- 1996-11-25 DE DE29620519U patent/DE29620519U1/de not_active Expired - Lifetime
-
1997
- 1997-07-24 EP EP97112772A patent/EP0844632A3/de not_active Ceased
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019175042A1 (de) * | 2018-03-16 | 2019-09-19 | Ellenberger & Poensgen Gmbh | Schutzschalter zur trennung eines stromkreises |
| CN112219253A (zh) * | 2018-03-16 | 2021-01-12 | 埃伦贝格尔及珀恩斯根有限公司 | 用于分离电流回路的保护开关 |
Also Published As
| Publication number | Publication date |
|---|---|
| DE29620519U1 (de) | 1997-02-06 |
| EP0844632A3 (de) | 1999-04-21 |
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