EP3055875B1 - Schaltgerät mit einem dämpfungselement für das kontaktsystem beim sprunghaften einschalten - Google Patents

Schaltgerät mit einem dämpfungselement für das kontaktsystem beim sprunghaften einschalten Download PDF

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Publication number
EP3055875B1
EP3055875B1 EP14731201.1A EP14731201A EP3055875B1 EP 3055875 B1 EP3055875 B1 EP 3055875B1 EP 14731201 A EP14731201 A EP 14731201A EP 3055875 B1 EP3055875 B1 EP 3055875B1
Authority
EP
European Patent Office
Prior art keywords
damping element
contact
switching device
switching
contact slide
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.)
Active
Application number
EP14731201.1A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3055875A1 (de
Inventor
Martin Steinbauer
Tobias KEMPTNER
Günter WIESENT
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 EP3055875A1 publication Critical patent/EP3055875A1/de
Application granted granted Critical
Publication of EP3055875B1 publication Critical patent/EP3055875B1/de
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Anticipated expiration legal-status Critical

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Classifications

    • 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
    • H01H71/504—Manual reset mechanisms which may be also used for manual release provided with anti-rebound means
    • 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
    • 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
    • H01H50/00—Details of electromagnetic relays
    • H01H50/16—Magnetic circuit arrangements
    • H01H50/18—Movable parts of magnetic circuits, e.g. armature
    • H01H50/30—Mechanical arrangements for preventing or damping vibration or shock, e.g. by balancing of armature
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/54—Contact arrangements
    • H01H50/546—Contact arrangements for contactors having 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
    • 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

Definitions

  • the invention relates to a switching device with a damping element for the contact system when suddenly switching, wherein the contact system comprises a contact slide and a guided therein movable contact piece, and wherein the movable contact piece is arranged opposite to a fixed contact piece.
  • Switching devices serve, among other things, the safe switching off in the event of a short circuit and thereby protect consumer installations.
  • electrical or mechanical switching units are suitable for the operational manual switching of consumers as well as for the safe disconnection of a system from the mains during maintenance work or when changing the system. Electrical switching units are often operated electromagnetically.
  • switching units are high-quality electrical switching devices with integrated protection for motors, lines, transformers and generators. They are used more closely at workstations with a lower switching frequency. Such switching units are suitable in addition to the short circuit protection for overload protection.
  • Circuit breakers have two separate release mechanisms for overload and short-circuit protection. Both triggers are connected in series. Short-circuit protection is provided by an electromagnetic release that acts 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 separates the contact piece before the short-circuit current can reach its maximum value.
  • switching units have a contact slide unit with a contact slide and a movable contact piece.
  • the movable contact piece also has electrical contacts.
  • switching units have first switching 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 fixed contacts.
  • circuit breakers In addition to their protective functions as overload and short-circuit releases, as already mentioned above, circuit breakers also fulfill the normative switching on and off of motors. To prove this function, the circuit-breakers must be able to switch on ten times the rated motor current in accordance with the product standard. In order to be able to ensure this limit load, it is necessary for the circuit breaker to close the double interruption of the three current paths in the form of a movable bridge with two movable contact points and two fixed contact points almost simultaneously and in a step function.
  • the DE 2315456 A1 describes a switching device with a damping element for the contact system when suddenly switching, wherein the contact system comprises a contact slide and a movable contact therein guided and wherein the movable contact is disposed opposite to a fixed contact, wherein the contact slide has at least one projection, the jump in the Switching the switching device is in operative connection with the damping element.
  • the object of the present invention is to provide a switching device with a contact system, which avoids bouncing of the switching device, a bouncing of the contacts.
  • a switching device with the features of claim 1.
  • Advantageous embodiments and developments, which can be used individually or in combination with each other, are the subject of the dependent claims.
  • the principle of quick turn-on is based on the fact that the closing movement of the contact apparatus, which has a contact slide, a bridge and a fixed contact piece, is decoupled from the switch-on movement of the switch lever, that is to say superordinately from the manually operated mechanism comprising actuating element, switch lock and transmission chain.
  • the contact apparatus and thus the bridge is held at the switch-on at a certain distance from the Festschalt Swissen from the shift lever until the parent hand-operated mechanism has completed the switch-on. Only then is the contact apparatus released, as a result of which the contacts are closed by the preloaded spring-loaded memory in a step function. Due to the high forces of the contact load spring, which are necessary due to the large device design, the contact slide after the contacts were closed, further accelerated.
  • the contact slide now hits the lever, is reflected by it and opens the contacts again during the collision with the bridge, which leads to welding of the contacts and thus to failure of the device.
  • This problem is solved by a damping element which is part of the subassembly.
  • the object of this damping element is to withdraw the kinetic energy of the contact slide after the sudden turn-on of the device and thus to avoid reflecting the contact slide and thus reopening the contacts.
  • the damping element according to the invention is preferably designed as a stamped and bent part and is used in the present construction as a catch spring.
  • the catch spring is installed below the baffle fixed to the lower part assembly.
  • the catch spring has V-shaped leaf spring elements which form-fit the contact slide, which is provided with trapezoidal thickenings, in the installed state. If the contact slide is located between two positions "on” and “off”, then the catch spring is ineffective and the freedom of movement of the contact slide is not restricted. However, if the contact slide continues to move upwards after a quick start-up process due to its own inertia and lifts off from the bridge, then it is effectively braked by the catch spring in its upward movement. Reflecting on the shift lever is therefore no longer possible. As a result, the contacts can not be opened again, so that welding and ultimately destruction of the device can be avoided.
  • the catching spring according to the invention which has V-shaped leaf spring elements, and a trapezoidal thickening as a counterpart on the contact slide, this is effectively braked, if it is further accelerated upwards by its own inertia when switching.
  • the catch spring according to the invention it is avoided that the contact slide is reflected on the shift lever due to its kinetic energy and reopens the contacts during its backward movement. The danger of welding the contacts and destroying the device is no longer possible.
  • the damping element according to the invention is that of the usual assembly operations must not be deviated, since the missing elements of the catch spring can be easily bridged during assembly of the contact slide.
  • the catch spring has no effect on the freedom of movement of the contact slide. Only when the contact slide lifts off the bridge will this effectively braked by the catch spring to avoid reflection.
  • the contact slide is U-shaped, with a central region and two side guides, on which at least one projection is arranged.
  • the projection is preferably a trapezoidal thickening on a side guide of the contact slide, which is designed as a counterpart to a bulge in the damping element, whereby the contact slide is effectively braked in the upward movement of the switching device in its upward movement. Reflecting on the shift lever of the switching device is thus no longer possible. As a result, the contacts of the contact system can not be opened, so that welding is avoided.
  • An inventive continuation of this concept may consist in that the damping element is designed as a stamped and bent part.
  • the design of the damping element as a stamped and bent part has the advantage that the damping element can be easily and inexpensively manufactured and also can be easily mounted.
  • a further concept may consist in that the damping element is U-shaped with two side bars spaced apart parallel to each other and a transition area.
  • the design of the damping element according to the invention in U-shape has the advantage that the damping element can be positioned around the baffle of the switching device, which is generally located at the bottom of the housing of the switching device. As a result, a fixed fixation of the damping element in the subassembly of the switching device is possible.
  • the guide plate is arranged on the transition region of the damping element.
  • the side webs of the damping element have bulges which are in operative connection with the at least one projection on the contact slide when the switching device is suddenly switched on. If the contact slide is located between two positions "on” and “off”, then the damping element is ineffective and the freedom of movement of the contact slide is not restricted. Moves the contact slide, however, after its rapid activation by its inertia further up and lifts off the bridge, so the damping element is effectively braked by the interaction of the projection on the contact slide and the bulge on the damping element in its upward movement. Reflecting on the shift lever is therefore no longer possible.
  • a technical continuation of this inventive concept may consist in that the damping element is positioned below a guide plate of the switching device.
  • the baffle of a switching device in particular a circuit breaker, is generally positioned on the housing bottom.
  • the guide plate can be guided through the two side webs of the damping element that are parallel to one another and spaced apart from each other and rest on the transition region of the damping element. This is associated with a fixed fixation of the damping element on the lower part of the switching device.
  • the damping element is designed as a leaf spring element.
  • the advantage of this special embodiment of the damping element is that no particularly large space must be provided for this type of spring element.
  • the damping element it is possible in this specific embodiment, to enclose the contact slide with its trapezoidal detections in the installed state form fit.
  • the contact slide is enclosed by the damping element in the installed state in a form-fitting manner.
  • This particular embodiment is particularly favored by a damping element, which is designed as a leaf spring element.
  • the switching device is a circuit breaker.
  • the switching device is surrounded by a housing and has a contact system, with a contact slide, in which a movable contact piece is guided with contacts, and an opposite to the movable contact piece fixedly positioned switching piece.
  • the contact slide is preferably U-shaped with a central region and two side guides. Between the side guides of the contact slide a contact load spring is arranged. Above the central region of the contact slide, a shift lever is arranged, which is in operative connection to the contact system.
  • the principle of quick turn-on is based on the fact that the closing movement of the contact device consisting of contact slide and fixed and movable contact pieces is decoupled from the switch-on movement of the shift lever, that is to say superordinately from the manually operated mechanism comprising actuating element, switch lock and transmission chain.
  • the contact apparatus and thus the bridge is held at the switch-on at a certain distance from the Festschalt consultancyen from the shift lever until the parent hand-operated mechanism has completed the switch-on. Only then is the contact apparatus released, as a result of which the contacts are closed by the prestressed spring accumulator in a kind of jump function.
  • the contact load spring is arranged on a baffle which is positioned on the housing bottom of the switching device.
  • the contact slider, the contact load spring, which is positioned between the side guides of the contact slide, and the Guide plate are of a damping element, which is preferably designed as a leaf spring element or as a catch spring, in such a way that the damping element bears against a side guide of the contact slide and is performed below the baffle.
  • the switching device according to the invention with a damping element for the contact system is characterized in that is avoided with the use of the damping element that the contact slide on the shift lever due to its kinetic energy reflects and re-opens the contacts during its backward movement.
  • the danger that the contacts weld and the device is thereby destroyed, is no longer given.
  • Another advantage is that of the usual assembly operations must not be deviated, since the resilient element can be easily bridged during assembly of the contact slide.
  • the damping element has no effect on the freedom of movement of the contact slide. Only when the contact slide lifts off the bridge is it effectively braked by the catch spring to avoid reflection.
  • Fig. 1 shows a switching device according to the invention, which is surrounded by a housing and having a contact system, which has a contact slide 1, in which a movable contact piece 2 is guided with contacts, and a movable contact piece 2 arranged opposite fixedly positioned contact piece 3.
  • the contact slide 1 is preferably U-shaped with a central region 4 and two side guides 5, 6. Between the side guides 5, 6 of the contact slide 1, a contact load spring 7 is arranged. Above the central region 4 of the contact slide 1, a shift lever 8 is arranged, which is in operative connection to the contact system.
  • the principle of quick turn-on is based on the fact that the closing movement of the contact apparatus consisting of contact slide 1, movable contact piece 2 and fixed contact piece 3 is decoupled from the switch-on movement of the shift lever 8, that is to say superordinate to the manually operated mechanism, actuating element, switch lock and transmission chain.
  • the movable contact piece 2 is held at the switching on at a certain distance from the Festschalt Anlagenen 3 from the shift lever 8 until the parent hand-operated mechanism has completed the switch-on. Only then is the contact apparatus released, as a result of which the contacts are closed by the prestressed spring accumulator in a kind of jump function.
  • the contact load spring 7 is seated on a plastic dome in the lower part of the switching device.
  • a baffle 9 is positioned at the bottom of the housing.
  • the contact slide 1, the contact load spring 7, between the side guides 5, 6 of the contact slide 1, and the guide plate 9 are of a damping element 10, which is preferably designed as a leaf spring element or as a catch spring, in such a way that the damping element 10 abuts the side guides 5.6 of the contact slide 1 and is performed below the baffle 9 ,
  • Fig. 2 shows how the damping element 10, the unit comprising contact slide 1, contact load spring 7 and baffle 9.
  • the damping element 10 is preferably U-shaped with a transition region 11 and two side bars 12, 13 spaced parallel to each other and from each other.
  • the side web 12 of the damping element 10 rests against the side guide 5 of the contact slide 1.
  • the side web 13 of the damping element 10 abuts against the side guide 6 of the contact slide 1.
  • the baffle 9 is positioned on the transition region 11 of the damping element 10 and guided by the side webs 12, 13, so that the damping element 10, the side guides 4, 5 of the contact slide, the contact load spring 7 positioned therebetween and the guide plate 9 comprises.
  • From the Fig. 2 also shows that the side webs 12, 13 of the damping element 10 bulges 14, which are formed to the side guides 5, 6 of the contact slide 1 out.
  • Fig. 3 shows the contact system according to the invention with damping element in the off state.
  • the contacts When switched off, the contacts are open and the shift lever 8 is located on the contact slide 1 on.
  • the damping element 10 is in this switching state without effect. From this FIG. 3 go out projections 15 which are arranged at the ends of the side guides 5,6 of the contact slide 1. These projections 15 cooperate with the bulges 14, the damping element 10 after a quick turn on.
  • Fig. 4 shows the contact system according to the invention with damping element 10 in the on state.
  • the shift lever 8 When switched on, the shift lever 8 is not directly on the contact slide 1 on.
  • the contacts of moving contact piece 2 and fixedly positioned switching piece 3 are closed in this switching state.
  • the damping element 10 is also without effect.
  • Fig. 5 the contact system according to the invention with damping element 10 is shown after the sudden turn on.
  • the contacts are still closed here.
  • the contact slide 1 tries to accelerate, but is braked by the damping element 10.
  • the braking operation is caused by the interaction of the projections 15 on the side guides 5, 6 of the contact slide 1 with the bulge 14 on the side webs 12, 13 of the damping element 10.
  • the damping element 10 is preferably designed as a catch spring and forms the counterpart to a preferred trapezoidal thickening on the contact slide.
  • the movement of the contact slide 1 is effectively braked.
  • this damping element 10 it is avoided that the contact slide 1 is reflected on the shift lever 8 due to its kinetic energy and reopens the contacts during its backward movement. The danger that the contacts weld and the device is thereby destroyed, is no longer given.
  • the switching device according to the invention with a damping element for the contact system is characterized in that is avoided with the use of the damping element that the contact slide on the shift lever due to its kinetic energy reflects and re-opens the contacts during its backward movement.
  • the danger that the contacts weld and the device is thereby destroyed, is no longer given.
  • Another advantage is that of the usual assembly operations must not be deviated, since the resilient element can be easily bridged during assembly of the contact slide.
  • the damping element has no effect on the freedom of movement of the contact slide. Only when the contact slide from the bridge This is effectively braked by the catch spring to avoid reflection.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Slide Switches (AREA)
  • Switches Operated By Changes In Physical Conditions (AREA)
EP14731201.1A 2014-06-11 2014-06-11 Schaltgerät mit einem dämpfungselement für das kontaktsystem beim sprunghaften einschalten Active EP3055875B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2014/062138 WO2015188858A1 (de) 2014-06-11 2014-06-11 Schaltgerät mit einem dämpfungselement für das kontaktsystem beim sprunghaften einschalten

Publications (2)

Publication Number Publication Date
EP3055875A1 EP3055875A1 (de) 2016-08-17
EP3055875B1 true EP3055875B1 (de) 2018-05-16

Family

ID=50976610

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14731201.1A Active EP3055875B1 (de) 2014-06-11 2014-06-11 Schaltgerät mit einem dämpfungselement für das kontaktsystem beim sprunghaften einschalten

Country Status (5)

Country Link
US (1) US10043628B2 (fi)
EP (1) EP3055875B1 (fi)
CN (1) CN106463310B (fi)
BR (1) BR112016015651B1 (fi)
WO (1) WO2015188858A1 (fi)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3067909B1 (de) * 2015-03-11 2017-10-18 Siemens Aktiengesellschaft Kontaktschiebereinheit für eine schalteinheit
FR3074355B1 (fr) * 2017-11-28 2020-12-18 Schneider Electric Ind Sas Dispositif de coupure d'un courant electrique

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1015100B (de) 1953-12-22 1957-09-05 Voigt & Haeffner Ag Vorrichtung zum Vermeiden von Kontaktprellungen bei einem elektromagnetisch betaetigten Schalter
DE1764291B2 (de) 1968-05-10 1972-06-15 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Elektromagnetisches tauchankerrelais mit mitteln zur verminderung der prellneigung
US3808389A (en) * 1973-01-26 1974-04-30 Three Dimensional Circuits Inc Key for electric contact keyboard
DE2315456B2 (de) 1973-03-26 1978-06-22 Siemens Ag, 1000 Berlin Und 8000 Muenchen Schaltgerät mit einer Dämpfungsanordnung
DE4203803C2 (de) 1992-02-10 1997-04-17 Siemens Ag Schaltschütz
NO20003974L (no) * 2000-02-18 2001-08-20 Ziad Badarneh Manöverinnretning
CN103578867A (zh) 2013-11-14 2014-02-12 贵州振华群英电器有限公司 一种提高接触器振动性能的结构

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
BR112016015651A2 (fi) 2017-08-08
US10043628B2 (en) 2018-08-07
EP3055875A1 (de) 2016-08-17
BR112016015651B1 (pt) 2022-01-11
WO2015188858A1 (de) 2015-12-17
CN106463310B (zh) 2018-08-03
US20170032918A1 (en) 2017-02-02
CN106463310A (zh) 2017-02-22

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