EP1328956B1 - Strombegrenzender niederspannungs-leistungsschalter - Google Patents

Strombegrenzender niederspannungs-leistungsschalter Download PDF

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Publication number
EP1328956B1
EP1328956B1 EP01964861A EP01964861A EP1328956B1 EP 1328956 B1 EP1328956 B1 EP 1328956B1 EP 01964861 A EP01964861 A EP 01964861A EP 01964861 A EP01964861 A EP 01964861A EP 1328956 B1 EP1328956 B1 EP 1328956B1
Authority
EP
European Patent Office
Prior art keywords
contact
levers
circuit breaker
latching device
switching contact
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
EP01964861A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1328956A1 (de
Inventor
Michael Bach
Michael Sebekow
Guenter Seidler
Detlev Schmidt
Ingo Thiede
Sezai Tuerkmen
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 EP1328956A1 publication Critical patent/EP1328956A1/de
Application granted granted Critical
Publication of EP1328956B1 publication Critical patent/EP1328956B1/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
    • H01H77/00—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting
    • H01H77/02—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism
    • H01H77/10—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with electrodynamic opening
    • H01H77/102—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with electrodynamic opening characterised by special mounting of contact arm, allowing blow-off movement
    • H01H77/104—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with electrodynamic opening characterised by special mounting of contact arm, allowing blow-off movement with a stable blow-off position
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/50—Manual reset mechanisms which may be also used for manual release
    • H01H71/52—Manual reset mechanisms which may be also used for manual release actuated by lever
    • H01H71/528—Manual reset mechanisms which may be also used for manual release actuated by lever comprising a toggle or collapsible link between handle and contact arm, e.g. sear pin mechanism

Definitions

  • One of these principles is to cause the lifting contact forces to be effective at high currents before a normal mechanical latch is released in the switch drive. This is due to the fact that any stumping contact by the current forces a repulsive effect and if the contacts are not held together by external forces, they lift off at a certain amperage. With the opening of the contacts then the switching mechanism must be brought into the open position and the contact carrier with the switching mechanism to be locked again. It is desirable that, where appropriate, a single pole of a multi-pole circuit breaker is brought under the influence of these forces to open, while the others still remain closed, because just this one pole carries the high current.
  • the process described can be realized in different ways. For low demands, if the switching mechanism is particularly well, especially with low mass of moving parts, it is sufficient to release it in three poles. But it is better, as already mentioned, to effect a single-pole interruption of the affected current path, because a higher current limiting factor is thereby achieved.
  • the FR-PS 721 451 describes a DC-circuit breaker in which the current forces are generated by a separate from the contact system, responsive to a current increase electromechanical transducer.
  • AT-PS 250 479 is a current-limiting switch has become known, the movable lever is held in the closed position by a latch, which is solvable both by means of an induced by electrodynamic forces movement of the movable lever and by an electromagnetic overcurrent release. The transmission of the release movement of the overcurrent release on the Verklinkungsstelle done by several intermediate links.
  • DE-PS 1 801 071 is a low-voltage circuit breaker with a loop-shaped flow path, which generates diverging contact-opening forces, shown in which is moved by the occurring at very high overcurrents, electrodynamic forces in the contact system, the shift lever against the force of a spring.
  • a rod On the movable contact lever, a rod is provided, which is supported with a roller on a locking member. Through this locking member, which in turn is displaceable against spring force and a role, a latch lever is moved and released, whereby the shift lever can be brought into the Ausschaltlage.
  • the DE 15 13 341 A1 describes another such circuit breaker in which a repulsive effect between the two contact elements comes about at a high short-circuit current due to the electrodynamic forces.
  • a repulsive effect between the two contact elements comes about at a high short-circuit current due to the electrodynamic forces.
  • a support lever is rotated.
  • the release shaft is rotated, which causes a unlatching of the switching mechanism.
  • the DE 25 11 948 A1 describes a switch in which a lever arrangement for direct unlatching of the switching mechanism is actuated by an electrodynamic opening movement of the movable contact piece immediately after the contact opening and with increasing contact spring force.
  • the movable contact piece is rotatably mounted on a support and pressed in the closed position of a carrier supported on the contact force spring against the fixed contact piece.
  • the carrier is mounted on a fixed pivot point and locked rigidly in the on state by the switching mechanism.
  • the opening movement of the movable contact piece for unlocking the carrier is passed via a lever arrangement on the switching mechanism and on the lock of the carrier.
  • an articulated lever connection is provided as the connection between the movable contact lever carrier and the switching shaft, which is formed by mutually articulated part flaps is, which are acted upon by a spring so that they occupy a stretched position.
  • the movable contact lever carrier is not, as usual, rigid, but connected by a, preferably formed by a shaft pivot bearing with its support levers, so that it can perform a pivoting movement.
  • the movable contact lever carrier is further provided in the region of the contact lever shaft passing through it in normal switches with recesses which are formed so that its pivotal movement is not hindered by this contact lever shaft.
  • the object of the invention is therefore to propose a current-limiting low-voltage circuit breaker, which can be derived without significant design and manufacturing effort from a normal standard switch, without having to be made to this significant changes.
  • Conventional switches have a movable switching pole with a switching contact with a switch drive and between a lever chain which connects the switching shaft and the contact carrier, so that it is advisable to incorporate in the train of the lever chain an element having a mechanically non-linear characteristic, in that the Lever chain regardless of the shift shaft yields, kinks or buckle, if pressed by the current-carrying forces of the contact carrier against the lever chain.
  • the above object of the invention is achieved in that the previously executed as a lever chain power transmission from the switch drive to the contact carrier is structurally completely redesigned, insofar as it is constructed as a kind of articulated link.
  • the hinge pin expediently has at one end a head as an abutment for the pressure spring and at its other end a thread for a nut.
  • Serving as a toothing when loading the Verklinkungs adopted in the direction of rotation of the lever toward each other to moving inclined surfaces are formed with steep flanks as snap surfaces and the loading of the Verklinkungs adopted in the direction of rotation of the lever away from each other moving inclined surfaces have flat flanks as sliding surfaces.
  • the pressure spring is advantageously formed as the hinge pin enclosing and supported on the head of the hinge pin helical compression spring.
  • the axis of the joint connecting the lever is expediently arranged parallel to a pivot axis of the movable switching contact.
  • the force exerted by the pressure spring on the contact surfaces of the lever on the concentric parts in the region of the joint with the teeth acting as teeth inclined pressure is adjustable by changing the effective length of the hinge pin.
  • the latching device provides a new assembly for the force-transmitting connection of the switching shaft lever with the switching contact or the contact carrier. It is designed as a force-dependent buckling element, which makes it possible that, when a short-circuit current occurs, each switching unit opens independently of one another and independently of the ON position of the switching shaft.
  • the two levers of Verklinkungs are identical. So it is only one part of production.
  • the latching device according to the invention is not, as in known embodiments, telescoped together, but there is a rotary bending movement. If in the further course of the shutdown of the electromagnetic quick release switches off the switch finally, the Verklinkungs engaged is returned to its rest position by the rotating shaft and its switching shaft lever. The switch is ready to switch on again.
  • the Fig. 1 schematically shows a low-voltage circuit breaker with the latching device according to the invention in a sectional view in the off state.
  • the Fig. 2 schematically shows a low-voltage circuit breaker with the latching device according to the invention in a sectional view in the on state.
  • the Fig. 3 schematically shows a low-voltage circuit breaker with the latching device according to the invention in a sectional view in the tripped state.
  • the Fig. 4 shows a preferred embodiment of the latching device according to the invention in side view.
  • the Fig. 5 shows a single lever of Verklinkungs worn according to the invention according to the Fig. 4 in the plan view.
  • the Fig. 6 shows the Verklinkungs Healthy according to the invention according to the Fig. 1 partially assembled.
  • a low-voltage circuit breaker 1 is shown in section to illustrate the location of the Verklinkungs worn 13 according to the invention.
  • the upper connecting rail 3 and the lower connecting rail 4 are passed.
  • the fixed switching contact 5 and the lower connecting rail 4 is connected via flexible connections 6 of the located on a contact carrier 7 movable switch contact 8.
  • the arc extinguishing chamber 9 is arranged.
  • the switch drive 10 is the Shift shaft 11 with the switching shaft lever 12, to which the Verklinkungs worn 13 according to the invention is attached as a connecting element to the contact carrier 7.
  • Fig. 1 stand in the off state of the low-voltage circuit breaker 1, the lever 14, 15 in the rest state of Verklinkungs adopted 13 for generating a dependent on the opening force relative torque in an angle different from each other at the extended position, wherein the axis of the lever 14, 15 connecting joint 16 is arranged parallel to a pivot axis, not shown, of the movable switching contact 8.
  • the same constellation only in the on state of the low-voltage circuit breaker 1 shows the Fig.2 while in the Figure 3 the low-voltage circuit breaker 1 is shown with the Verklinkungs worn 13 in the tripped state in which the Verklinkungs recruited 13 is folded and an opening of the movable contact 8 is carried out.
  • the Fig. 4 shows a preferred embodiment of the latching device 13 according to the invention in the side view. It has two identically designed lever 14; 15, which are interconnected by a hinge 16 and pivotable about the hinge 16 relative to each other.
  • the contact surfaces of the lever 14; 15 included as inclined surfaces 17; 18 trained work surfaces, which in the form of a toothing of the concentric parts 19; 20 are formed.
  • the inclined surface 17 is formed steeply as a snap surface and the inclined surface 18 flat as a sliding surface.
  • the levers 14; 15 connecting joint 16 is through an aligned through holes 21; 22, the lever 14; 15 passing through hinge pin 23 is formed, which at the same time Guide and the holder for the trained as a helical compression spring pressure spring 24 forms, which surrounds the hinge pin 23 and the same is supported at the end of the hinge pin 23 by a disc-shaped head 25 thereof.
  • a thread 26 for receiving a nut 27 is provided, by means of which the voltage of the seated on the hinge pin 23 pressure spring 24 is variable.
  • the two levers 14; 15 are thus under the variable spring pressure of the pressure spring 24.
  • the levers 14, 15 each with a through hole 28, 29 provided recordings 30; 31, which serve for connection to the switching shaft lever 12 and the contact carrier 7.
  • the Fig. 5 shows a single lever of Verklinkungs worn according to the invention according to the Fig. 4 in the plan view.
  • the two levers 14; 15 are formed identically, which is why only one lever 15 is shown.
  • As inclined surfaces 17; 18 trained working surfaces of the lever 15 are arranged concentrically around the through hole 22 for the hinge pin 23 in the concentric part 20.
  • At the opposite end of the lever 15 which is provided with a through hole 29 receptacle 31 is arranged, which serves for connection to the switching shaft lever 12 and the contact carrier 7.
  • the Fig. 6 shows the Verklinkungs worn 13 according to the invention according to the Fig. 1 partially assembled with the nut 27 omitted.
  • this illustration in which like parts corresponding to Fig. 1 are provided with the same reference numerals, is clearly the formation of the inclined surfaces 17; 18 as a toothing of the concentric parts 19; 20 to recognize which is in the mounted state under the spring pressure of the seated on the hinge pin 23 pressure spring 24.
  • the spring force of the pressure spring 24 is easily adjusted by changing the effective length of the hinge pin 23 by more or less wide screwing the nut 27 and thus the functional force of Verklinkungs worn 13 adjustable.
  • the arrangement according to the invention is mechanically very simple and yet has the advantage that the functional force is easily adjustable.
  • the two levers 14, 15 are identical, so it is manufacturing moderate only one part to produce.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Breakers (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
EP01964861A 2000-10-27 2001-07-23 Strombegrenzender niederspannungs-leistungsschalter Expired - Lifetime EP1328956B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10054383A DE10054383A1 (de) 2000-10-27 2000-10-27 Strombegrenzender Niederspannungs-Leistungsschalter
DE10054383 2000-10-27
PCT/DE2001/002820 WO2002035570A1 (de) 2000-10-27 2001-07-23 Strombegrenzender niederspannungs-leistungsschalter

Publications (2)

Publication Number Publication Date
EP1328956A1 EP1328956A1 (de) 2003-07-23
EP1328956B1 true EP1328956B1 (de) 2008-12-31

Family

ID=7661955

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01964861A Expired - Lifetime EP1328956B1 (de) 2000-10-27 2001-07-23 Strombegrenzender niederspannungs-leistungsschalter

Country Status (7)

Country Link
US (1) US6819205B2 (zh)
EP (1) EP1328956B1 (zh)
JP (1) JP2004512647A (zh)
CN (1) CN1242445C (zh)
DE (2) DE10054383A1 (zh)
HK (1) HK1062356A1 (zh)
WO (1) WO2002035570A1 (zh)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10345660A1 (de) * 2003-09-25 2005-05-12 Siemens Ag Antriebsstrang für zumindest einen bewegbaren Kontakt eines elektrischen Schalters und strombegrenzender elektrischer Schalter mit einem Antriebsstrang
DE102005028474B4 (de) * 2005-06-20 2008-04-30 Siemens Ag Kontaktsystem, insbesondere für ein Schaltgerät
DE102007011451A1 (de) 2007-03-06 2008-09-11 Siemens Ag Kontakthebelbewegungseinrichtung und elektrischer Schalter sowie Verfahren zur Herstellung der Kontakthebelewegungseinrichtung
US7566840B2 (en) * 2007-10-04 2009-07-28 General Electric Company Contact arm mechanism for circuit breaker
US7911302B2 (en) * 2007-11-15 2011-03-22 General Electric Company Secondary trip system for circuit breaker
DE102008047247A1 (de) * 2008-09-10 2010-04-15 Siemens Aktiengesellschaft Kontaktsystem für ein Schaltgerät mit einem Schaltwellensegment drehbar gelagerten Kontaktglied und mit einer axial dazwischen angeordneten Rasteinrichtung
CN114496676A (zh) * 2020-10-26 2022-05-13 西门子能源国际公司 弧触头组件以及断路器

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE250749C (zh)
FR721451A (fr) 1930-06-27 1932-03-03 Merlin Gerin Perfectionnements aux disjoncteurs et particulièrement aux disjoncteurs à action rapide pour courant continu
DE1463311B2 (de) 1963-05-16 1970-03-19 Licentia Gmbh Selbstschalter mit strombegrenzender OEffnung des Kontaktsystems
DE1513341A1 (de) * 1965-12-29 1969-12-18 Licentia Gmbh Selbstschalter mit strombegrenzendem Kontaktsystem
CH486114A (de) 1968-05-14 1970-02-15 Siemens Ag Niederspannungsleistungsschalter mit einem feststehenden Leiterstück und einem mit diesem eine Stromschleife bildenden Schalthebel
DE2511948C3 (de) 1975-03-19 1978-05-03 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Strombegrenzender Leistungsschalter
US4998081A (en) * 1989-05-18 1991-03-05 Siemens Energy & Automation, Inc. Power interrupter with force-sensitive contact latch
US5566818A (en) 1993-02-16 1996-10-22 Fuji Electric Co., Ltd. Movable contactor device in circuit breaker
DE19630470C1 (de) * 1996-07-27 1997-08-28 Kloeckner Moeller Gmbh Strombegrenzender Leistungsschalter
DE19740422B4 (de) * 1997-09-10 2005-10-06 Siemens Ag Strombegrenzender Niederspannungs-Leistungsschalter
US6218921B1 (en) * 2000-02-24 2001-04-17 Eaton Corporation Adjustable flux transfer shunt trip actuator and electric power switch incorporating same
US6376788B1 (en) * 2001-01-08 2002-04-23 Eaton Corporation Magnetically collapsible toggle linkage for electrical switching apparatus

Also Published As

Publication number Publication date
CN1476623A (zh) 2004-02-18
US20040056744A1 (en) 2004-03-25
CN1242445C (zh) 2006-02-15
WO2002035570A1 (de) 2002-05-02
EP1328956A1 (de) 2003-07-23
JP2004512647A (ja) 2004-04-22
DE50114625D1 (de) 2009-02-12
US6819205B2 (en) 2004-11-16
HK1062356A1 (en) 2004-10-29
DE10054383A1 (de) 2002-05-08

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