EP0174904A1 - Dispositif de contact pour disjoncteur basse tension avec un levier de contact à deux bras - Google Patents

Dispositif de contact pour disjoncteur basse tension avec un levier de contact à deux bras Download PDF

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Publication number
EP0174904A1
EP0174904A1 EP85730104A EP85730104A EP0174904A1 EP 0174904 A1 EP0174904 A1 EP 0174904A1 EP 85730104 A EP85730104 A EP 85730104A EP 85730104 A EP85730104 A EP 85730104A EP 0174904 A1 EP0174904 A1 EP 0174904A1
Authority
EP
European Patent Office
Prior art keywords
contact
lever
contact lever
bearing pin
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.)
Granted
Application number
EP85730104A
Other languages
German (de)
English (en)
Other versions
EP0174904B1 (fr
Inventor
Bernhard Dipl.-Ing. Preuss
Karl-Heinz Ing. Grad. Manthe
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 EP0174904A1 publication Critical patent/EP0174904A1/fr
Application granted granted Critical
Publication of EP0174904B1 publication Critical patent/EP0174904B1/fr
Expired legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/32—Self-aligning contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/20—Bridging contacts
    • H01H1/2041—Rotating bridge
    • H01H1/205—Details concerning the elastic mounting of the rotating bridge in the rotor
    • 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
    • H01H73/04—Contacts
    • H01H73/045—Bridging contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/22—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact
    • H01H1/221—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact and a contact pressure spring acting between the pivoted member and a supporting member
    • H01H2001/223—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact and a contact pressure spring acting between the pivoted member and a supporting member using a torsion spring

Definitions

  • the invention relates to a contact arrangement for low-voltage circuit breakers, in particular current-limiting circuit breakers, with a two-armed contact lever which can be moved about a central axis of rotation, which is provided at its ends on opposite sides of a longitudinal axis crossing the axis of rotation, each with a switching element and the lever arms of which are each assigned a contact force spring is.
  • a contact arrangement of this type has become known from DE-OS 21 57 927.
  • such a contact arrangement has the advantage that no flexible current band is required in the current path of the switch, because the two-armed contact lever connects two fixed counter switching elements to one another in a bridge-like manner. When switching, two disconnection points connected in series are thus created.
  • the prerequisites for a high switching capacity are met.
  • the object of the invention is to achieve this the storage, the drive and the generation of the to improve a rotary contact system.
  • the bearing pin with the shift lever or is arranged to be stationary independently of this the contact lever in both cases the possibilities Alignment.
  • the contact lever can be provided with two stop surfaces arranged symmetrically to its center and there can be two drivers. This results in a symmetrical application of force.
  • An effective current limitation can be achieved in that the driver is or are arranged in relation to the contact lever with a free-wheel mechanism in such a way that the contact lever can move into an open position when the driver or the driver is in the unchanged position.
  • the opening position can correspond to the normal switch-off position or even a larger opening angle if a high current limitation is sought. It is advantageous that the rotation of the contact lever can take place independently of the drive parts only against the action of the contact force spring.
  • the drivers can be part of a switching shaft rotatable about the bearing pin. A driving force can be introduced into this from a space lying next to the switching chamber and therefore easily separable from it. Furthermore, such a switching shaft is best suited to effect a common drive of the contact levers of a multi-pole switch.
  • the contact force springs can advantageously be designed as torsion springs enclosing the bearing pin, one leg of which is supported on a counter surface of the control shaft and the other leg of which is supported on the contact lever.
  • the contact force springs are relatively far away from the contact points in this arrangement, which reduces the risk that the properties of the contact force springs are adversely affected by the switching arcs.
  • the contact force springs designed as torsion springs are arranged on both sides of the contact lever in such a way that they are accommodated in one pocket of a housing carrying the contact arrangement are and that the wall parts of the pocket for the passage of legs of the contact lever limit certain slots.
  • the wall parts hereby form an additional protection of the contact force springs against impairment by switching arcs.
  • the contact lever is designed in the form of a circular arc near its center on the side of the switching pieces.
  • the space between the contact lever and the wall parts remains the same regardless of the angular position when switching, so that the arc gases occurring during switching find a high flow resistance.
  • This not only protects the contact force springs, but also reduces stress on the bearing gaps of the selector shaft due to the arc gases and the gas passage to the adjacent phase.
  • a relatively coarse tolerance can be provided on the bearings of the switch shaft between adjacent current paths of a switch, which makes it easier to produce a one-piece switch shaft for multi-pole switches.
  • the contact arrangement shown in FIG. 1 is arranged in a chamber of a housing 1.
  • This housing consists of an insulating material and can be made in one or more parts.
  • the housing 1 is in the figure. 1 is shown in its outline, the further components belonging to a low-voltage circuit breaker, such as a drive device, a switch lock, trigger and connecting devices, not being shown, since they are known per se and do not require any explanation in the present context.
  • Only the main current path of a pole of a circuit breaker is shown, which extends from a first connecting bar 2 via a schematically indicated trip block 3 to a first fixed contact piece 4, from there via a rotatably mounted contact lever 5 to a further fixed contact piece 6 and a connecting bar 7 .
  • the contact lever 5 is provided at its opposite ends with a contact piece 10 and 11, respectively, which cooperate with the fixed contact pieces 4 and 6.
  • the switching pieces 10 and 11 of the contact lever 5 are arranged on opposite sides of the longitudinal axis 12 of the contact lever. By rotating the contact lever 5 counterclockwise, the switching pieces 10 and 11 can be separated from the fixed switching pieces 4 and 6 at the same time.
  • a bearing bolt 13 which is arranged in the housing 1 in a fixed manner or is made of insulating material, is used in connection with a central elongated hole 14 of the contact lever 5 13 corresponds, the contact lever 5 can move transversely to its longitudinal axis 12 on the bearing pin 13, because the longitudinal axis 15 of the elongated hole 14 is also perpendicular to the longitudinal axis 12 of the contact lever.
  • the contact forces occurring between the contact pieces 4 and 10 or 6 and 11 are thus independent of the mounting of the contact lever 5 and are based only on the action of contact force springs 47 and 48, the arrangement of which will be explained with reference to FIG. 2.
  • the contact lever 5 has two stop surfaces 16 and 17 arranged opposite one another with respect to the bearing axis. These are provided for cooperation with drivers 20 and 21, which are part of a switching shaft 22 made of insulating material and rotatable about the bearing pin 13.
  • the stop surfaces 16 and 17 lie on the longitudinal axis 15 of the elongated hole 14. A displacement caused by the alignment of the contact lever 5 on the bearing pin 13 therefore has no influence on the interaction between the stop surfaces 16 and 17 and the drivers 20 and 21.
  • the drivers 20 and 21 are lifted from the stop surfaces 16 and 17, so that apart from a bearing friction between the bearing pin 13 and the elongated hole 14, only the contact force springs are effective.
  • the contact lever 5 can rotate under the influence of current forces in the unchanged position of the control shaft 22.
  • the central area of the contact lever 5 overlapped by the drivers 20 and 21 is also provided with circular sections 34 and 35. In a known manner can be ensured by a not shown latching that the contact lever 5 is held in its electrodynamically open position until the switching lock is released.
  • the housing 1 is divided in the area of the contact arrangement shown by wall parts in such a way that a first arc chamber 23 and a second arc chamber 24 and a central pocket 25 are formed.
  • Conventional quenching plate arrangements 25 and 26 are located in the arc chambers.
  • the middle pocket 25 is provided for receiving the selector shaft 22 and the contact force springs, as will be explained below.
  • the wall parts of the pocket 25 delimit slots 27 and 28 for the passage of the legs 8 and 9 of the contact lever 5.
  • Parts 30 and 31 in the form of a circular arc are located near the center of the contact lever 5 at a short distance from edges 32 and 33 which define the slots 27 and limit 28. These points are located on the side of the legs 8 and 9 of the contact lever 5, which are on the side of the switching pieces 10 and 11. In this way, a good seal of the area of origin of the switching arcs with respect to the pocket 25 is achieved in every angular position of the contact lever 5. The penetration of switching gases into the pocket 25 is hindered thereby.
  • the housing 1 is provided with adjacent rooms for receiving three parallel current paths according to FIG. 1.
  • the bearing pin 13 extends over all current paths, as does the control shaft 22, which is rotatable about the bearing pin 13.
  • the switching shaft is designed such that it encloses the partitions, forming a labyrinth gap.
  • a very narrow dimensioning of the gap can, however, be dispensed with because the exposure of the pockets 25 to arcing gases is relatively low, as has already been pointed out.
  • Fig. 2 shows that the slots 27 and 28 between the wall parts of the pockets 25 are dimensioned so that the contact lever can be rotated freely.
  • the slots are so wide that legs 45 and 46 of contact force springs 47 and 48 designed as torsion springs also have space next to the legs 8 and 9 of the contact levers 5.
  • the legs 45 and 46 can be shortened compared to the example shown, that they rest on the legs 8 and 9 within the pocket 25 in order to be able to adapt the width of the slots more closely to the thickness of the legs 8 and 9. This is shown in the area of the middle current path 43, where the narrower slots are designated 57 and 58.
  • the torsion springs 47 and 48 each have a further leg 50 and 51, which is supported on the control shaft 22. Due to the symmetrical arrangement of two contact force springs for each contact lever, one-sided stress is avoided and the contact forces are equal.
  • Fig. 2 is indicated schematically that the switching shaft 22 is connected at one end to a drive device having a switch lock 52 and a manual actuator 53 (Fig. 1). Furthermore, the switch lock 52 is connected to triggers, for which an overcurrent release 54, a short-circuit release 55 and an undervoltage release 56 are given as examples.
  • the low voltage circuit breaker described above operates with a high current limit.
  • This property is based on the loop-shaped supply leads to the fixed contact pieces 4 and 6.
  • This arrangement causes the legs 8 and 9 of the contact lever 5 at a short distance from the busbars carrying the switching pieces 4 and 6, so that high currents exert a torque acting in the opening direction on the contact lever 5.
  • the contact lever 5 assumes the position shown in broken lines in FIG. 1. In a known manner, this prevents the short-circuit current from reaching its full height.
  • the release of the switch lock 52 (FIG. 2) follows, since the short-circuit current also acts on the trigger 55.
  • the low-voltage circuit breaker described also has a current-limiting property if the power supply is not loop-shaped in the manner shown, because current-dependent contact-lifting forces also occur between the switching elements themselves and, as a result of the double-contact arrangement, these forces are stronger than with single-contact arrangements Effects come.
  • An example of this is shown in simplified form in FIG. 3.
  • the connecting rails shortened compared to FIG. 1 are designated there by 60 and 61.
  • the desired amount of current limitation can thus be influenced by the configuration of the power supply to the fixed contact pieces 4 and 6.
EP85730104A 1984-08-23 1985-08-07 Dispositif de contact pour disjoncteur basse tension avec un levier de contact à deux bras Expired EP0174904B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3431288 1984-08-23
DE19843431288 DE3431288A1 (de) 1984-08-23 1984-08-23 Kontaktanordnung fuer niederspannungs-leistungsschalter mit einem zweiarmigen kontakthebel

Publications (2)

Publication Number Publication Date
EP0174904A1 true EP0174904A1 (fr) 1986-03-19
EP0174904B1 EP0174904B1 (fr) 1988-05-04

Family

ID=6243865

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85730104A Expired EP0174904B1 (fr) 1984-08-23 1985-08-07 Dispositif de contact pour disjoncteur basse tension avec un levier de contact à deux bras

Country Status (6)

Country Link
US (1) US4649247A (fr)
EP (1) EP0174904B1 (fr)
JP (1) JPH0610947B2 (fr)
CA (1) CA1258283A (fr)
DE (2) DE3431288A1 (fr)
MX (1) MX160683A (fr)

Cited By (17)

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Publication number Priority date Publication date Assignee Title
FR2622347A1 (fr) * 1987-10-26 1989-04-28 Merlin Gerin Dispositif de coupure pour un disjoncteur multipolaire a contact rotatif double
EP0394922A1 (fr) * 1989-04-28 1990-10-31 Asea Brown Boveri Ab Dispositif de contact pour appareils de commutation électriques
WO1992000598A1 (fr) * 1990-06-27 1992-01-09 Asea Brown Boveri Ab Contacts pour dispositifs de commutation electriques
FR2682530A1 (fr) * 1991-10-15 1993-04-16 Merlin Gerin Gamme de disjoncteurs basse tension a boitier moule.
EP0646938A1 (fr) * 1993-10-05 1995-04-05 Schneider Electric Sa Disjoncteur à chambre d'extinction d'arc perfectionnée
WO1998005053A1 (fr) * 1996-07-27 1998-02-05 Klöckner-Moeller Gmbh Sectionneur de puissance limiteur de courant
WO1998005049A1 (fr) * 1996-07-27 1998-02-05 Klöckner-Moeller Gmbh Boitier de chambre de commutation pour un sectionneur de puissance et modules servant a fabriquer ce boitier de chambre de commutation
EP0889498A2 (fr) * 1997-07-02 1999-01-07 AEG Niederspannungstechnik GmbH & Co. KG Dispositif de contact rotatif pour disjoncteur à courant fort
EP0903761A2 (fr) * 1997-09-23 1999-03-24 AEG Niederspannungstechnik GmbH & Co. KG Interrupteur
WO2001006529A1 (fr) * 1999-07-17 2001-01-25 Moeller Gmbh Systeme de contact comportant une barre de contact a deux bras
WO2001065582A2 (fr) * 2000-02-29 2001-09-07 General Electric Company Double bande de connexion pour disjoncteur a contacteur rotatif
FR2818003A1 (fr) * 2000-12-09 2002-06-14 Moeller Gmbh Dispositif de commutation comportant un contact rotatif monte flottant et a double coupure
FR2825189A1 (fr) * 2001-05-28 2002-11-29 Fuji Electric Co Ltd Disjoncteur en boitier moule
CZ300252B6 (cs) * 2005-08-15 2009-04-01 Oez S. R. O. Pohyblivý kontakt elektrického prístroje, zvlášte jistice
EP2079088A2 (fr) * 2008-01-14 2009-07-15 Siemens Aktiengesellschaft Commutateur, notamment commutateur de puissance doté de deux paires de contacts commutés en série pour interrompre une voie de courant
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DE932191C (de) * 1951-07-17 1955-08-25 Hochkoepper & Co P Walzenschalter, dessen Schaltwalze mit Schirmwaenden zwischen den leitenden Teilen versehen ist
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Cited By (31)

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Publication number Priority date Publication date Assignee Title
FR2622347A1 (fr) * 1987-10-26 1989-04-28 Merlin Gerin Dispositif de coupure pour un disjoncteur multipolaire a contact rotatif double
EP0314540A1 (fr) * 1987-10-26 1989-05-03 Merlin Gerin Dispositif de coupure pour un disjoncteur multipolaire à contact rotatif double
US4910485A (en) * 1987-10-26 1990-03-20 Merlin Gerin Multiple circuit breaker with double break rotary contact
EP0394922A1 (fr) * 1989-04-28 1990-10-31 Asea Brown Boveri Ab Dispositif de contact pour appareils de commutation électriques
WO1992000598A1 (fr) * 1990-06-27 1992-01-09 Asea Brown Boveri Ab Contacts pour dispositifs de commutation electriques
EP0538149A1 (fr) * 1991-10-15 1993-04-21 Schneider Electric Sa Gamme de disjoncteurs basse tension à boitier moulé
FR2682530A1 (fr) * 1991-10-15 1993-04-16 Merlin Gerin Gamme de disjoncteurs basse tension a boitier moule.
US5298874A (en) * 1991-10-15 1994-03-29 Merlin Gerin Range of molded case low voltage circuit breakers
AU660489B2 (en) * 1991-10-15 1995-06-29 Schneider Electric Sa Range of molded case low voltage circuit breakers
EP0646938A1 (fr) * 1993-10-05 1995-04-05 Schneider Electric Sa Disjoncteur à chambre d'extinction d'arc perfectionnée
WO1998005053A1 (fr) * 1996-07-27 1998-02-05 Klöckner-Moeller Gmbh Sectionneur de puissance limiteur de courant
WO1998005049A1 (fr) * 1996-07-27 1998-02-05 Klöckner-Moeller Gmbh Boitier de chambre de commutation pour un sectionneur de puissance et modules servant a fabriquer ce boitier de chambre de commutation
US6087609A (en) * 1996-07-27 2000-07-11 Kloeckner-Moeller-Gmbh Circuit breaker, arcing chamber housing for a circuit breaker and housing module for an arcing chamber housing
EP0889498A3 (fr) * 1997-07-02 1999-06-16 AEG Niederspannungstechnik GmbH & Co. KG Dispositif de contact rotatif pour disjoncteur à courant fort
EP0889498A2 (fr) * 1997-07-02 1999-01-07 AEG Niederspannungstechnik GmbH & Co. KG Dispositif de contact rotatif pour disjoncteur à courant fort
EP0903761A2 (fr) * 1997-09-23 1999-03-24 AEG Niederspannungstechnik GmbH & Co. KG Interrupteur
EP0903761A3 (fr) * 1997-09-23 1999-12-08 AEG Niederspannungstechnik GmbH & Co. KG Interrupteur
WO2001006529A1 (fr) * 1999-07-17 2001-01-25 Moeller Gmbh Systeme de contact comportant une barre de contact a deux bras
US6403901B1 (en) 1999-07-17 2002-06-11 Moeller Gmbh Spring biased contact system including a rotatable symmetrical contact with two lever arms
WO2001065582A2 (fr) * 2000-02-29 2001-09-07 General Electric Company Double bande de connexion pour disjoncteur a contacteur rotatif
WO2001065582A3 (fr) * 2000-02-29 2001-12-06 Gen Electric Double bande de connexion pour disjoncteur a contacteur rotatif
FR2818003A1 (fr) * 2000-12-09 2002-06-14 Moeller Gmbh Dispositif de commutation comportant un contact rotatif monte flottant et a double coupure
FR2825189A1 (fr) * 2001-05-28 2002-11-29 Fuji Electric Co Ltd Disjoncteur en boitier moule
CZ300252B6 (cs) * 2005-08-15 2009-04-01 Oez S. R. O. Pohyblivý kontakt elektrického prístroje, zvlášte jistice
EP2079088A2 (fr) * 2008-01-14 2009-07-15 Siemens Aktiengesellschaft Commutateur, notamment commutateur de puissance doté de deux paires de contacts commutés en série pour interrompre une voie de courant
EP2079088A3 (fr) * 2008-01-14 2010-08-18 Siemens Aktiengesellschaft Commutateur, notamment commutateur de puissance doté de deux paires de contacts commutés en série pour interrompre une voie de courant
US7902948B2 (en) 2008-01-14 2011-03-08 Siemens Aktiengesellschaft Switching device, in particular a power switching device, having two pairs of series-connected switching contacts for interrupting a conducting path
DE102008027582A1 (de) * 2008-06-10 2009-12-24 Siemens Aktiengesellschaft Schaltvorrichtung zur Doppelunterbrechung
DE102008027582B4 (de) * 2008-06-10 2011-03-17 Siemens Aktiengesellschaft Schaltvorrichtung zur Doppelunterbrechung
DE102013208373A1 (de) * 2012-08-29 2014-03-06 Siemens Aktiengesellschaft Rotor für einen elektrischen Schalter
US9299518B2 (en) 2012-08-29 2016-03-29 Siemens Aktiengesellschaft Rotor for an electric switch

Also Published As

Publication number Publication date
CA1258283A (fr) 1989-08-08
JPH0610947B2 (ja) 1994-02-09
MX160683A (es) 1990-04-09
US4649247A (en) 1987-03-10
JPS6161319A (ja) 1986-03-29
EP0174904B1 (fr) 1988-05-04
DE3562537D1 (en) 1988-06-09
DE3431288A1 (de) 1986-03-06

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