EP2992543A1 - Bloc de coupure, en particulier disjoncteur - Google Patents

Bloc de coupure, en particulier disjoncteur

Info

Publication number
EP2992543A1
EP2992543A1 EP14741539.2A EP14741539A EP2992543A1 EP 2992543 A1 EP2992543 A1 EP 2992543A1 EP 14741539 A EP14741539 A EP 14741539A EP 2992543 A1 EP2992543 A1 EP 2992543A1
Authority
EP
European Patent Office
Prior art keywords
movable
contact piece
switching
movable contact
short
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
EP14741539.2A
Other languages
German (de)
English (en)
Other versions
EP2992543B1 (fr
Inventor
Rainer Kreutzer
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
Priority to EP14741539.2A priority Critical patent/EP2992543B1/fr
Publication of EP2992543A1 publication Critical patent/EP2992543A1/fr
Application granted granted Critical
Publication of EP2992543B1 publication Critical patent/EP2992543B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • H01H1/36—Contacts characterised by the manner in which co-operating contacts engage by sliding
    • 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
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/24—Electromagnetic mechanisms
    • H01H71/2409—Electromagnetic mechanisms combined with an electromagnetic current limiting mechanism
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
    • H01H3/38—Driving mechanisms, i.e. for transmitting driving force to the contacts using spring or other flexible shaft coupling
    • 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
    • H01H1/50—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/50—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position
    • H01H2001/508—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position with mechanical means to prevent return/reverse movement of movable contact once opening or closing cycle has started
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/60—Mechanical arrangements for preventing or damping vibration or shock
    • 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
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/24—Electromagnetic mechanisms
    • H01H71/2418—Electromagnetic mechanisms combined with an electrodynamic current limiting mechanism

Definitions

  • the invention relates to a switching unit, in particular a circuit breaker, with a contact slide unit having ei ⁇ NEN contact slide and a fixed and a movable contact piece, and a short-circuit release, which acts on a push rod in the event of a short circuit on the movable contact piece.
  • Switching units serve, among other things, the safe switching off in the event of a short circuit and thus protect consumers and systems. Further, electrical or mechanical switching units are suitable for ⁇ be instinctive, manual switching of consumers and for the safe separation of a plant from the power supply during maintenance work or changes in the plant. Electrical switching units are often operated electromagnetically.
  • switching units are high-quality electrical switching devices with integrated protection for Mo ⁇ gates, lines, transformers and generators. They are used at workstations with lower switching frequency. Such switching units are suitable in addition to the short circuit protection for overload protection.
  • an electrical switching ⁇ unit safely disconnects an electrical system.
  • This provides a protection against overload. Every conductor through which electricity flows heats up more or less. The heating depends on the ratio of the current to the conductor cross section, the so-called current density. The current density must not be too large, otherwise the conductor insulations may be spattered or possibly cause a fire due to excessive heating.
  • switching units are used as overcurrent protective devices. Circuit breakers have two separate release mechanisms for overload and short-circuit protection. Both triggers are connected in series.
  • the short-circuit protection is provided by an electromagnetic release that works almost instantaneously. In the event of a short circuit, the electromagnetic release unlocks without delay a circuit breaker of the circuit breaker. A switching armature disconnects the contactor before the short-circuit current can reach its maximum value.
  • Known switching units have a contact slide unit with a contact slide and a movable contact piece.
  • the movable contact member further includes electrical contacts ⁇ Kon.
  • switching units have first contacts to a power line.
  • the electrical contacts of the movable contact piece contact the fixed contacts of the switching unit.
  • the electrical contacts of the movable contact piece are released from the fixed contacts, so that the flow of current is interrupted.
  • the movable contact is released from the fixed contacts.
  • Known contact slides of switching units often have two guide systems, an inner and an outer guide ⁇ system.
  • the outer guide system is used when the switching operation, that is, the switching on or off, via a switching mechanism of the switching unit. This does not create a bridge twister.
  • the inner guidance system is used in the case of short-firing if the switching operation is achieved via a switching armature, frequently a tappet, the switching unit. follows. That is, when switching off due to a Kurzschlus ⁇ ses the movable contact piece along the inner guide system ahead of the contact slide, bounces on Aufschlag ⁇ surfaces in the so-called lower part of the switching unit and flies back along the inner guide system.
  • Switching piece and a non-functioning switching unit are detrimental to the electrical loads and the system in which the switching unit is installed.
  • the object of the present invention since ⁇ rin, to provide a switching unit, which the timing of the contact-opening mechanisms reliably ensured even at high short-circuit currents.
  • this object is achieved by a switching unit, in particular a circuit breaker, with a contact slide unit having a contact slide and a fes ⁇ tes and a movable contact piece, and a short ⁇ circuit trigger, which acts on a short stroke on the movable contact piece via a plunger.
  • Switching unit comprises a movable brake device which is designed such that in case of short circuit, the movable brake device dampens the movement of the rebounded, movable contact piece.
  • the invention makes use of the physical principle of energy exchange in the collision of two bodies. If two bodies bang together, their velocities change analogously to their mass ratios. The contact piece rebounding from the housing meets a mass. The speed of the switching piece is significantly slower ⁇ velvet and thus the time to reach the fixed contact make extended. This time delay is sufficient for the switch lock to be able to travel the way to a permanent minimum contact opening width.
  • the movable contact piece is guided on a guide element, wherein the movable Bremsvorrich ⁇ tion is disposed above the movable contact piece and at the upper end of the guide element.
  • the guide element is preferably designed as a guide pin and has a region of greater mass.
  • the center of mass is above the moving contact.
  • the mass is moved to the current dynamic lifting of the contact piece by the plunger of the short-circuit release in the return trajectory of the contact piece.
  • the resulting inevitable collision with the on the return flight ⁇ sensitive switching piece leads to the desired time delay.
  • the movable braking device in the form of a mass is a flat-shaped metal part produced by means of stamping technology.
  • stamping technology the advantage is associated that stamped parts are ponderegüns ⁇ tiger.
  • the flat shape of the metal part reduces the insulation distance between the two switching poles, so the L and the T-side, far less than a mass equal, asymmetric rotary part. It also requires a smaller space.
  • a second mass is positioned in addition to the first mass below the movable contact piece. Both masses are together connected to a double mass, preferably by an opening breakthrough located in the switching bridge. They are also arranged axially displaceable in the direction of the contact opening. At stromdynamischer contact bridge opening suggests the
  • the bridge and double mass fly up to the possibly different housing stops and rebound from there.
  • the housing stop of the double ⁇ mass is further away from the contact point as the contact ⁇ bridge.
  • the preloaded contact load spring moves both parts back towards contact.
  • the movable brake device is arranged on the plunger of the short-circuit release. This embodiment is characterized by a very simple installation.
  • the switching unit has a Needlesschie ⁇ beraji with a contact slide and a fixed and a movable contact piece, which are arranged opposite to each other.
  • a plunger of a short-circuit release is arranged above the contact slide unit.
  • a tubular extension is formed which is integrally connected to either of the plunger or is molded as a separate part on the plunger.
  • This tubular extension ent ⁇ speaks in this embodiment of the mass that forms the braking device.
  • the movable contact piece has an opening in which the guide element is positioned.
  • the guide ⁇ element preferably has above the movable switching piece designed as a mass braking device. Before ⁇ preferably a further additional mass may be arranged as Bremsvor ⁇ direction and below the movable contact piece on the guide element. When triggered, the plunger of the short-circuit release moves in the direction of the movable switching piece.
  • the invention is characterized in that by positioning ⁇ at least one additional mass which serves as a braking device, an energy exchange is caused by the impact of two bodies, which leads tocommunicationsreduzie ⁇ tion of the movable contact piece.
  • the additional masses for the braking device according to the invention are at least in two embodiments on the guide element is arranged, which leads the movable contact piece.
  • the guide element has a double function. On the one hand it serves as a braking device to the speed of the movable, rebounded
  • the guide element guides the movable contact piece, so that rotations of the contact piece due to a highegasimpul ⁇ ses be reliably avoided.
  • Switching unit thus allows reliable even at high short-circuit currents, the timing of the contact-opening mechanisms.
  • FIG. 1 in a schematic sectional view of a first embodiment of a switching unit according to the invention with a contact slide and a short-circuit release with a braking device according to the invention in the form of an additional mass in the on state;
  • FIG. 2 is a schematic sectional view of the embodiment according to FIG. 1 in the case of a short circuit;
  • FIG. 3 shows a schematic sectional view of the embodiment of Figures 1 and 2 during the bridge reflection of the movable contact piece on the braking device ..;
  • FIGS. 1 to 3 shows a schematic sectional view of the embodiment according to FIGS. 1 to 3 with a contact point held open by the switching mechanism ;
  • 5 shows a schematic sectional view of a second exemplary embodiment of a switching unit according to the invention with a contact slide and a short-circuit release with a braking device according to the invention in the form of a double mass in the switched-on state;
  • FIG. 6 is a schematic sectional view of the embodiment according to FIG. 5 in the case of a short circuit
  • FIG. 7 shows a schematic sectional view of the exemplary embodiment according to FIG. 6 in the case of a short circuit, wherein the
  • FIGS. 5 to 7 shows a schematic sectional view of the embodiment according to FIGS. 5 to 7 during bridge reflection of the movable contact piece on the braking device;
  • FIGS. 5 to 8 are schematic sectional views of the embodiment according to FIGS. 5 to 8 with a through the
  • FIG. 10 is a schematic sectional view of a third embodiment of a switching unit according to the invention with a contact slide and a short-circuit release with a brake device according to the invention in the form of a tubular body-like extension of the plunger of the short-circuit release in the on state;
  • Figure 11 is a schematic sectional view of the Ausry tion of Figure 1 in the event of a short circuit.
  • FIG. 12 is a sectional view of the embodiment of Figures 10 and 11 during the bridge reflection of the movable contact piece on the braking device ..;
  • Fig. 13 is a sectional view of the embodiment of Figures 10 to 12 with a ge through the switching lock held contact.
  • FIG. 14 is a prior art path-time diagram for the movable contact
  • Fig. 15 shows an inventive path-time diagram for the embodiments with an additional mass as Bremsvor ⁇ direction or with a tubular body Fortsat on the plunger as a braking device for the movable switching ⁇ piece; 16 shows an inventive path-time diagram for the exemplary embodiment with a double mass according to the invention as a braking device for the movable contact piece.
  • FIG. 17 is a perspective view of a further embodiment of a switching unit according to the invention with a short-circuit release with a braking device according to the invention in the form of a mass, which is produced as a flat metal part by means of punching technology.
  • 1 shows a first exemplary embodiment of a switching unit according to the invention with a contact slide unit, which has a contact slide 1 and a fixed and a movable contact piece 2, 3, and a short-circuit release 4, which acts via a plunger 5 in the event of a short circuit on the movable contact piece 3.
  • the movable contact piece 3 has an opening 6, through which a guide element 7 is guided.
  • the guide element 7 is above the movable
  • Switching piece 3 is formed with a mass 8, which is arranged on the movable contact 3, that they in the event of short circuit, the movable contact 3 from the fixed
  • Switching piece 2 separates when the plunger 5 hits the mass 8.
  • FIG. 1 also shows a mechanical kinematics chain to be unlatched in the form of a switching lock 10.
  • the switch lock 10 must keep the radio ⁇ tion, the contact link permanently open when triggered.
  • FIG. 2 the contact slide unit of Fig. 1 in the off ⁇ solvent case is shown.
  • the plunger 5 meets the mass 8 of the guide element 7, whereby the Füh ⁇ approximately element 7 moves back into the guide of the housing 9 and thereby separates the movable contact piece 3 from the fixed contact piece 2.
  • Fig. 3 shows the first embodiment according to FIGS. 1 and 2 during the bridge reflection of the movable contact piece 3 on the braking device, which is formed in the form of the mass 8 on the guide element 7.
  • FIGS. 1 to 3 shows the embodiment according to FIGS. 1 to 3, wherein the contact bridge is held in the opened state by the switching mechanism 10.
  • Fig. 5 shows a second embodiment of a switching unit according OF INVENTION ⁇ dung with a contact slide 1 and a short-circuit release 4 with an inventive
  • the contact slide unit has a contact slide 1 as well as a fixed and a movable contact piece 2, 3 and a short-circuit release 4, which acts on the movable contact 3 via a plunger 5 in the event of a short circuit.
  • the guide member 12 is formed above and below ⁇ of the movable contact piece 3 respectively at the end portions with a mass that characterizes the dung OF INVENTION ⁇ braking device according to the second embodiment in the form of a double mass.
  • the mass is such as bronzebil ⁇ det above the movable contact piece 3, that separates the movable contact 3 from the fixed contact piece 2 in the case of short circuit, when the plunger 5 hits the ground.
  • the mass below the movable switching ⁇ piece 3 is designed such that it limits the movement of the movable contact 3 in the event of triggering.
  • FIG. 5 also shows a mechanical kinematics chain to be unlatched in the form of a switching lock 10.
  • the switch lock 10 must keep the radio ⁇ tion, the contact link permanently open when triggered.
  • FIG. 6 shows the contact slide unit according to FIG. 5 in the case of release.
  • the plunger 5 meets the double mass 11 of the guide member 12, whereby the guide member 12 moves back ⁇ be in the leadership of the housing 9 and thereby the movable contact piece 3 from fixed
  • Fig. 7 shows the embodiment according to FIGS. 5 and 6 in the case of short circuit, wherein the movements of the movable contact piece 3 on the one hand by the housing stop and the Others is limited by the double mass 11 below the movable contact piece 3.
  • FIGS. 5 to 8 shows the second embodiment according to FIGS. 5 to 7 during the bridge reflection of the movable contact piece 3 on the braking device according to the invention, which is designed in the form of a double mass 11 on the guide element 12.
  • Fig. 9 the embodiment of FIGS. 5 to 8 is shown, being held by the switching mechanism 10, the Dodgebrü ⁇ bridge in the open state.
  • FIG. 10 shows a third exemplary embodiment of a switching unit according to the invention with a contact slide 1 and a short-circuit release 4 with a switching device according to the invention
  • the contact slide unit comprises a contact slide 1 and a fixed and a movable contact piece 2, 3 and a short-circuit release 4, which acts via a plunger 5 in the event of a short circuit on the movable contact piece 3.
  • the braking device in the form of a tubular body-like extension 13, which surrounds the end of the plunger 5, is formed.
  • FIG. 10 also shows a mechanical kinematics chain to be unlatched in the form of a switching mechanism 10.
  • the switching mechanism 10 has the function of keeping the contact bridge permanently open when triggered.
  • FIG. 11 the contact slide unit of FIG. 10 is shown in the case of activation.
  • the plunger 5, including the tubular body-like extension 13 strikes the moving contact piece 3, whereby the movable contact piece 3 is separated from the fixed contact piece 2.
  • Fig. 12 the third embodiment according to FIGS. 10 and
  • Fig. 14 shows a path-time diagram for a moving one
  • FIG. 15 shows a path-time diagram for an exemplary embodiment according to the invention with an additional mass as
  • Braking device or shown with a tubular body-like extension on the plunger as a braking device for the movable contact piece. It can be seen from the diagram that the path from the contact contact So to the housing stop S2 equals the course from FIG. 14. However, the path from the housing stop L2 in the direction of contact contact is different. Here, at the point Si, there is the collision and thus the energy exchange between the respective braking device and the movable contact piece. The associated time gain is evident from the diagram in the form of the time interval t 2 . Due to the time delay, which is caused by the braking device, the operation of the switching mechanism is guaranteed. In Fig. 16, the path-time diagram for the embodiment according to the invention with double mass is shown as a braking device for the movable contact piece.
  • a further switching unit according to the invention with a fixed and a movable contact piece 2, 3 and a short-circuit release 4 is shown, which acts via a plunger 5 in the event of a short circuit on the movable contact piece 3.
  • the guide element 7 is formed above the movable contact piece 3 with a mass 8, which is arranged on the movable contact piece 3 such that in the event of a short circuit, the movable contact piece 3 from the fixed
  • the mass 8 is formed in this embodiment as a flat-shaped metal part, which was produced by means of stamping technology.
  • the invention is characterized in that by positioning ⁇ tion of at least one additional mass, which serves as a braking device, an energy exchange is caused by the impact of two bodies, which leads to speed reduction of the movable contact piece.
  • the additional masses for the braking device according to the invention are arranged at least in two embodiments on the guide element, which guides the movable contact piece.
  • the guide element serves as a braking device to reduce the speed of the movable rebound GmbHstü ⁇ ckes in the event of triggering.
  • the guide element guides the movable contact piece so that rotations of the contact piece due to a high momentum of movement are reliably avoided.
  • the switching input ⁇ standardized according to the invention thus makes it possible also reliable at high short-circuit currents ⁇ the timing of the contact-opening mechanisms.

Abstract

L'invention concerne un bloc de coupure, en particulier un disjoncteur, qui comprend un ensemble curseur de contact, comportant un curseur de contact (1) ainsi qu'une pièce de contact fixe (2) et une pièce de contact mobile (3), et un déclencheur sur court-circuit (4) qui agit sur la pièce de contact mobile (3) par le biais d'un poussoir en cas de court-circuit. L'invention est caractérisée en ce que le bloc de coupure comporte un dispositif de freinage mobile qui est adapté pour amortir le déplacement par rebond de la pièce de contact mobile (3) en cas de court-circuit.
EP14741539.2A 2013-09-16 2014-07-08 Unité de commutation, notamment commutateur de puissance Active EP2992543B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP14741539.2A EP2992543B1 (fr) 2013-09-16 2014-07-08 Unité de commutation, notamment commutateur de puissance

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP13184489.6A EP2849199A1 (fr) 2013-09-16 2013-09-16 Unité de commutation, notamment commutateur de puissance
EP14741539.2A EP2992543B1 (fr) 2013-09-16 2014-07-08 Unité de commutation, notamment commutateur de puissance
PCT/EP2014/064568 WO2015036143A1 (fr) 2013-09-16 2014-07-08 Bloc de coupure, en particulier disjoncteur

Publications (2)

Publication Number Publication Date
EP2992543A1 true EP2992543A1 (fr) 2016-03-09
EP2992543B1 EP2992543B1 (fr) 2019-04-24

Family

ID=49212614

Family Applications (2)

Application Number Title Priority Date Filing Date
EP13184489.6A Withdrawn EP2849199A1 (fr) 2013-09-16 2013-09-16 Unité de commutation, notamment commutateur de puissance
EP14741539.2A Active EP2992543B1 (fr) 2013-09-16 2014-07-08 Unité de commutation, notamment commutateur de puissance

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP13184489.6A Withdrawn EP2849199A1 (fr) 2013-09-16 2013-09-16 Unité de commutation, notamment commutateur de puissance

Country Status (4)

Country Link
US (1) US9947486B2 (fr)
EP (2) EP2849199A1 (fr)
CN (1) CN105340045B (fr)
WO (1) WO2015036143A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021104812B3 (de) 2021-03-01 2022-02-17 elobau GmbH & Co.KG Stufenhubtaster

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3516090A (en) * 1965-05-21 1970-06-02 Gen Electric Current limiting circuit breaker with independent acting high speed opening means
US4104494A (en) * 1974-11-25 1978-08-01 David Allen Swann Electric switches
DE102006054984A1 (de) * 2006-11-22 2008-05-29 Abb Ag Installationsschaltgerät mit einer Doppelunterbrechung
DE102006055007A1 (de) 2006-11-22 2008-05-29 Abb Ag Installationsschaltgerät mit einer Doppelunterbrechung
DE102007015794B4 (de) 2007-03-30 2009-02-26 Siemens Ag Kontaktschiebereinheit für eine Schalteinheit, insbesondere einen Leistungsschalter, aufweisend einen Kontaktschieber und ein Schaltstück
DE102008016036A1 (de) * 2008-03-28 2009-10-01 Abb Ag Installationsschaltgerät mit einer Doppelunterbrechung
EP2704171A1 (fr) 2012-08-29 2014-03-05 Siemens Aktiengesellschaft Unité à curseur de contact pour une unité de commutation, notamment pour un disjoncteur

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2015036143A1 *

Also Published As

Publication number Publication date
US9947486B2 (en) 2018-04-17
US20160203921A1 (en) 2016-07-14
EP2849199A1 (fr) 2015-03-18
WO2015036143A1 (fr) 2015-03-19
CN105340045B (zh) 2018-06-05
EP2992543B1 (fr) 2019-04-24
CN105340045A (zh) 2016-02-17

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