EP0980085B1 - Leitungsschutzschalter mit lichtbogenbetätigter Blasspule - Google Patents

Leitungsschutzschalter mit lichtbogenbetätigter Blasspule Download PDF

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Publication number
EP0980085B1
EP0980085B1 EP99115328A EP99115328A EP0980085B1 EP 0980085 B1 EP0980085 B1 EP 0980085B1 EP 99115328 A EP99115328 A EP 99115328A EP 99115328 A EP99115328 A EP 99115328A EP 0980085 B1 EP0980085 B1 EP 0980085B1
Authority
EP
European Patent Office
Prior art keywords
arc
circuit breaker
coil
contact
contact 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.)
Expired - Lifetime
Application number
EP99115328A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0980085A3 (de
EP0980085A2 (de
Inventor
Anton Dipl.-Ing. Glas
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG, Siemens Corp filed Critical Siemens AG
Publication of EP0980085A2 publication Critical patent/EP0980085A2/de
Publication of EP0980085A3 publication Critical patent/EP0980085A3/de
Application granted granted Critical
Publication of EP0980085B1 publication Critical patent/EP0980085B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • 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
    • H01H9/46—Means for extinguishing or preventing arc between current-carrying parts using arcing horns
    • H01H9/465—Shunt circuit closed by transferring the arc onto an auxiliary electrode
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
    • H01H73/02—Details
    • H01H73/18—Means for extinguishing or suppressing arc

Definitions

  • the invention relates to a circuit breaker or circuit breaker with a fixed contact and with a switchable for producing a switchable electrical connection of two leads against this moving contact and a blow coil for the magnetic blowing of a resulting in the separation of the contacts electric arc.
  • a resulting in a turn-off operation of a circuit breaker (LS-switch) electrical arc is highly undesirable because such a one hand, even after opening the contact point maintains the flow of current and thus extends the switching time.
  • the electrical flashover referred to as an arc
  • releases a comparatively large amount of heat which in particular leads to a strong heating of the switch contacts at the point of application of the arc. This heating can lead to damage or destruction of the contacts. It is therefore necessary to extinguish the arc which inevitably occurs during a switch-off process as quickly as possible after it has arisen.
  • an extinguishing device in particular an extinguishing chamber, is usually provided on the side of the switch contacts.
  • the arc In order to drive the arc out of the contact region into the extinguishing device and thus accelerate the switch-off process, the arc is frequently exposed to a magnetic field acting transversely to the arc gap. With the correct orientation of the magnetic field, a force known as the Lorentz force is exerted on the arc consisting of moving charge carriers, accelerating it in the direction of the extinguishing device.
  • a magnetic field forced migration of the arc is referred to as magnetic blowing.
  • the circuit breaker disclosed therein comprises a fixed contact and a switchable for making a switchable electrical connection of two leads against this moving contact and a blow coil for magnetic blowing of a resulting in the separation of the contacts electric arc, the blow coil between such a supply line and a contact element for coupling the arc is connected, that after disconnection of the contacts, an electrical connection of the leads via the arc and the blow coil takes place.
  • the invention has for its object to provide a circuit breaker with an independent of the Stromflußraum and particularly effective magnetic blowing of an electric arc.
  • a blow coil is provided for the magnetic blowing of the arc, on the one hand to a supply line, in particular the moving contact associated feed line is connected.
  • the blow coil is connected to a contact element, which is provided as a derivative for the arc.
  • the contact element is designed such that after separation of the contacts, the arc acts on the contact element.
  • the blow coil is switched such that the two leads are conductively connected via the arc and the blow coil.
  • the contact element is at least laterally as the moving contact in its open position formed with respect to an arc gap surrounding fishing shoe.
  • the invention is based on the consideration that a magnetic blowing in an all-current circuit breaker is particularly effective when the direction of the magnetic field always changes with the Stromflußraum within the arc. It uses the experience that such a flow-dependent magnetic field change is advantageously achieved by means of a blow coil. In this case, an improvement over a conventional blinding coil could be achieved if the blown coil operated only in an existing arc, i. E. flowed through by electricity would. At all other times, however, a flow of current through the puff coil should be prevented in order to prevent unnecessary power consumption and thus unwanted heat generation. As is known, the described effect is achieved when the puff is contacted by the arc.
  • the arc acts as a kind of switch that only switches on the blower coil when the arc is present.
  • the contact element in the form of a catching shoe, which surrounds the moving contact in the open position at least laterally with respect to the arc gap, the moving contact immersed in its open position in the catching shoe, wherein the arc from the moving contact on skip the fishing shoe and turn on the blower field in this way.
  • the contact element is provided with a permanent magnet, which generates a magnetic field approximately perpendicular to the magnetic field and thus deflects the arc in the direction of the contact element. In this way, the skipping of the arc to the contact element is significantly accelerated.
  • the LS switch in an expedient embodiment comprises two rails, which feed the arc from the region of the contacts of a quenching chamber.
  • the area formed between the rails is referred to as the expansion area of the arc.
  • an insulating wall is preferably arranged between the expansion region of the arc and the blow coil, which prevents a rollover of the arc to the blow coil.
  • a first running rail connects electrically conductively to the contact element.
  • the electrical connection of the first rail to the contact element favors the skipping of the arc from the contact element on the running rail.
  • the first running rail is only brought up to an insulating distance to the contact element and connected via a line parallel to the blow coil line with the corresponding supply line. In this way, the blow coil is only turned on to drive the arc from the contact element on the rails.
  • the current flow through the blower coil is interrupted as soon as the arc has jumped over the rails. Heating the blown coil by the electrical power converted into it is thus further reduced.
  • the blower coil can be realized in a particularly space-saving way.
  • the advantages achieved by the invention are in particular that a particularly effective magnetic blowing of an arc takes place by means of an arc-operated blow coil, since the blow coil only in case of need, i. when an arc occurs in operation.
  • the direction of the Lorentz force only depends on the winding sense of the blow coil, but not on the current flow direction within the arc.
  • FIG. 1 shows a partial view of a circuit breaker (LS switch) 1, which is arranged via two leads 2 and 3 in a circuit, not shown.
  • the supply line 2 is electrically connected via a contact clip 4 with a fixed contact 5.
  • the supply line 3 is electrically connected via conductors 6 and 7 to a contact arm 8, which carries a moving contact 9 end.
  • the contact arm 8 is mounted pivotably about a rotation axis 10 such that in the closed position of the circuit breaker 1, not shown, the moving contact 9 rests on the fixed contact 5.
  • the circuit is closed in this case via the supply line 2, the contact bracket 4, the fixed contact 5, the moving contact 9, the contact arm 8, the conductors 7 and 6 and the supply line 3.
  • the LS-switch 1 is provided with a trigger shown only hinted 11, which emits a mechanical impulse to the contact arm 8 and a not-shown switching mechanism upon the occurrence of a predetermined trigger condition.
  • a trigger condition for example, a short-circuit current can be set within the circuit.
  • mechanical pulse of the contact arm 8 is pivoted in the open position shown in FIG 1.
  • this pivoting of the contact arm 8 which can also be done manually in a conventional manner, the fixed contact 5 and the moving contact 9 are separated from each other.
  • the moving contact 9 is arranged in its open position within a catching shoe 13.
  • the trapping shoe 13 is formed substantially as a hollow cuboid of a conductive material.
  • the catching shoe 13 is open at one of the fixed contact 5 facing side surface 14 and at one of the axis of rotation 10 of the contact arm 8 facing side surface 15, so that the interior 16 of the fishing boot 13 forms a pocket into which the contact arm 8 can be pivoted.
  • the north-south axis 19 is at least approximately aligned with the axis of rotation 10 out.
  • the north-south axis 19 thus runs approximately parallel to the contact arm 8 in its open position. In this way it is achieved that the static magnetic field S generated by the permanent magnet 18 (shown in FIG. 3) is approximately perpendicular to the arc gap 12.
  • the fishing boot 13 is electrically connected to a blow coil 20, which in turn is electrically connected to the supply line 3.
  • the blow coil 20 is wound in a coil plane 21 which is arranged parallel to a contact plane 22.
  • the contact plane 22 is defined as the plane in which the contact arm 8 is pivotable, and which contains the contacts 5 and 9 and the arc gap 12.
  • an insulating wall 23 is arranged between the inflation coil 20 and the contact plane 22. In this way it is prevented that the arc B rolls over the blow coil 20 and short circuits it.
  • the LS switch 1 further comprises two rails 24 and 25, each near an end point of the arc gap 12 begin and extend from there to a quenching chamber 26. In this case, the distance between the rails 24,25 increases in their course to the quenching chamber 26 toward.
  • the moving contact 9 associated with the first track 24 is electrically connected to the fishing boot 13.
  • the second running rail 25 is formed from a remote from the trigger 11 and beyond the fixed contact 5 also extended part of the contact clip 4.
  • the rails 24 and 25 thereby extend approximately within the contact plane 22.
  • the area enclosed by the arc gap 12, the rails 24, 25 and the quenching chamber 26 is designated as the widening area 27 of the electric arc B.
  • the magnetic field direction within the catching shoe 13 is approximately parallel to the north-south axis 19 of the permanent magnet 18.
  • the arc B is displaced in the direction of a side wall 28 or 29 of the catching shoe 13 as a result of the Lorentz force F1.
  • the direction of the Lorentz force F1 is - depending on the current flow direction within the arc B - either aligned with the side wall 28 or diametrically opposite to the opposite side wall 29.
  • the arc B thus automatically switches on the bleaching coil 20, which now generates a magnetic field M which is approximately perpendicular to the contact plane 22. Under the influence of this magnetic field M, the arc B is acted upon by a further Lorentz force F2, which acts on the arc B in the direction of the rails 24,25. Under the action of the Lorentz force F2, the arc B jumps from the fixed contact 5 to the adjacent second running rail 25 or from the catching shoe 13 to the associated first running rail 24. Thereafter, the arc is fed along the extension region 27 to the quenching chamber 26, where the arc B is extinguished.
  • the leads 2 and 3 are electrically isolated. Since in a reversal of the direction of current flow within the arc B, the direction of current flow inside the blow coil 20 and thus the direction of the magnetic field M reverses, the direction of the Lorentz force F2 depends only on the winding sense of the blow coil 20, but not from the current flow direction.
  • the winding sense of the blow coil 20 is chosen such that the direction of the Lorentz force F2 is aligned with the expansion region 27 of the arc B.
  • FIG. 4 shows an advantageous development of the circuit breaker switch 1.
  • the first running rail 24 is not connected directly to the catching shoe 13. Rather, an insulating gap 30 is formed between the running rail 24 and the fishing boot 13.
  • the running rail 24 is connected by means of a separate line 31 to the supply line 3.
  • This embodiment has the advantage that after skipping the arc B on the running rail 24, the puff 20 is de-energized. Another heating up the blow coil 20 and thus the LS switch 1 is thereby avoided.

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Circuit Breakers (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Breakers (AREA)
EP99115328A 1998-08-13 1999-08-03 Leitungsschutzschalter mit lichtbogenbetätigter Blasspule Expired - Lifetime EP0980085B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19836829 1998-08-13
DE19836829 1998-08-13

Publications (3)

Publication Number Publication Date
EP0980085A2 EP0980085A2 (de) 2000-02-16
EP0980085A3 EP0980085A3 (de) 2000-08-02
EP0980085B1 true EP0980085B1 (de) 2006-11-22

Family

ID=7877497

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99115328A Expired - Lifetime EP0980085B1 (de) 1998-08-13 1999-08-03 Leitungsschutzschalter mit lichtbogenbetätigter Blasspule

Country Status (4)

Country Link
EP (1) EP0980085B1 (es)
AT (1) ATE346366T1 (es)
DE (1) DE59913992D1 (es)
ES (1) ES2276490T3 (es)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7417520B2 (en) 2006-08-01 2008-08-26 Schaltbau Gmbh Contactor for direct current and alternating current operation
DE102007054960B3 (de) * 2007-11-17 2009-04-23 Moeller Gmbh Schaltgerät für Gleichstrom-Anwendungen
EP2061053A2 (de) 2007-11-17 2009-05-20 Moeller GmbH Schaltgerät für Gleichstrom-Anwendungen

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10352934B4 (de) * 2003-11-11 2005-12-22 Siemens Ag Lichtbogen-Löschvorrichtung
EP2393096B1 (de) * 2010-06-07 2013-02-13 ABB Schweiz AG Einfach unterbrechendes Niederspannungsschaltgerät, insbesondere Leitungsschutzschalter
DE102010031907B9 (de) * 2010-07-22 2013-01-17 Schaltbau Gmbh Unidirektional schaltendes DC-Schütz
EP2642500A1 (de) * 2012-03-21 2013-09-25 Eaton Industries GmbH DC-Schalter ohne Löschkammern
US10510506B1 (en) * 2019-01-31 2019-12-17 Carling Technologies, Inc. Narrow profile circuit breaker with arc interruption
CN114937580B (zh) * 2022-06-13 2025-11-14 浙江天正电气股份有限公司 一种用于直流断路器的灭弧室及直流断路器

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB930101A (en) * 1958-08-02 1963-07-03 Whipp & Bourne Ltd Improvements in or relating to air-break circuit-breakers
US3155801A (en) * 1960-12-21 1964-11-03 Ite Circuit Breaker Ltd Arc chute side with encapsulated face wound blowout coil
DE2841004C2 (de) * 1978-09-21 1980-10-02 Licentia Gmbh Leitungsschutzschalter mit zusätzlicher Blasschleife
DE3023673A1 (de) * 1980-06-25 1982-01-14 Deutsche Forschungs- und Versuchsanstalt für Luft- und Raumfahrt e.V., 5300 Bonn Verfahren zur loeschung des abreissbogens in schaltern und magnetfeldanordnung im kathodenbereich eines schalters zur durchfuehrung dieses verfahrens
US4451718A (en) * 1981-02-27 1984-05-29 Mitsubishi Denki Kabushiki Kaisha Circuit breaker

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7417520B2 (en) 2006-08-01 2008-08-26 Schaltbau Gmbh Contactor for direct current and alternating current operation
DE102007054960B3 (de) * 2007-11-17 2009-04-23 Moeller Gmbh Schaltgerät für Gleichstrom-Anwendungen
EP2061053A2 (de) 2007-11-17 2009-05-20 Moeller GmbH Schaltgerät für Gleichstrom-Anwendungen
EP2061052A2 (de) 2007-11-17 2009-05-20 Moeller GmbH Schaltgerät für Gleichstrom-Anwendungen
DE102007054958A1 (de) 2007-11-17 2009-06-04 Moeller Gmbh Schaltgerät für Gleichstrom-Anwendungen
EP2383761A1 (de) 2007-11-17 2011-11-02 Eaton Industries GmbH Schaltgerät für Gleichstrom-Anwendungen

Also Published As

Publication number Publication date
DE59913992D1 (de) 2007-01-04
ATE346366T1 (de) 2006-12-15
ES2276490T3 (es) 2007-06-16
EP0980085A3 (de) 2000-08-02
EP0980085A2 (de) 2000-02-16

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