EP2608233A1 - Commutateur de séparation de charge électrique pour basses tensions - Google Patents

Commutateur de séparation de charge électrique pour basses tensions Download PDF

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Publication number
EP2608233A1
EP2608233A1 EP12007930.6A EP12007930A EP2608233A1 EP 2608233 A1 EP2608233 A1 EP 2608233A1 EP 12007930 A EP12007930 A EP 12007930A EP 2608233 A1 EP2608233 A1 EP 2608233A1
Authority
EP
European Patent Office
Prior art keywords
contact
lever
piece
point
housing
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.)
Withdrawn
Application number
EP12007930.6A
Other languages
German (de)
English (en)
Inventor
Dirk Hauck
Ralf Weber
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.)
ABB AG Germany
Original Assignee
ABB AG Germany
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
Priority claimed from DE102012001336.1A external-priority patent/DE102012001336B4/de
Priority claimed from DE201220001641 external-priority patent/DE202012001641U1/de
Application filed by ABB AG Germany filed Critical ABB AG Germany
Publication of EP2608233A1 publication Critical patent/EP2608233A1/fr
Withdrawn legal-status Critical Current

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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
    • H01H71/52—Manual reset mechanisms which may be also used for manual release actuated by lever
    • H01H71/526—Manual reset mechanisms which may be also used for manual release actuated by lever the lever forming a toggle linkage with a second lever, the free end of which is directly and releasably engageable with a contact structure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/58—Electric connections to or between contacts; Terminals
    • 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

Definitions

  • the invention relates to a low-voltage electrical switch-disconnector, according to the preamble of claim 1.
  • a switch-disconnector should be able to be switched off under power and also be able to carry high short-circuit currents. In addition, he should also allow a switch to an overcurrent.
  • a switch-disconnector with reduced material costs has only one contact point and only two contact pieces.
  • Such a load-break switch is in the DE 10 2004 001 939 A1 shown.
  • the movable contact piece is mounted on a pivotable contact lever, and the contact lever is pivotally supported in a current-carrying cutting bearing.
  • the rear derailleur is realized as a simple snap-action mechanism without latching.
  • the contact pressure spring has to apply both the pressing force of the movable contact lever into the cutting bearing, as well as the contact pressure force at the contact point, which requires a very strong spring and a correspondingly stable housing construction and the risk of unreliable switching harbors. Due to the strong spring switching the jump gear by means of the switch knob is difficult.
  • the switch-disconnector comprises a switching mechanism with Verklinkungsstelle, the switching mechanism can take a latched and a unlatched state, wherein it is set in the latched state for transmitting the shift lever movement on the contact lever, and wherein it is in the unlatched state for decoupling Shift lever movement is formed by the contact lever, and in that a current of the contact point supplying, first movable conductor piece is attached to the contact lever near the movable contact piece, and that a current away from the contact point leading second conductor piece is fixed to the contact carrier.
  • the contact lever is pivotally mounted in the housing, the bearing point of the contact lever is not traversed by electricity.
  • the current flows near the movable contact piece in the contact lever and flows through this only a short piece.
  • the contact pressure spring is only responsible for applying the contact pressure force at the contact point.
  • the structure is simpler.
  • the formation of the derailleur as a rear derailleur with Verklinkungsstelle creates favorable leverage for switching, so that a low switching power is required to turn. To switch off only the latch must be released, the Verklinkungsstelle be unlatched in the then resulting freewheel of the rear derailleur pushes the contact pressure spring the contact lever off.
  • the switch lock has a latching position formed by a release lever and a fixed rotatably mounted, a slot for guiding a bracket having latching lever, and the switch lock has an intermediate lever which at one end with the contact lever and with his other End is hinged to the bracket, wherein the bracket is articulated with at least one leg on the switch knob.
  • the contact lever forms a first prefabricated insertable into the housing of the service switching device, which is mounted pivotably after insertion into the housing at a rotationally fixed to the housing axis of rotation, and the switch knob forms with the release lever, the latch lever, the intermediate lever and the bracket a second prefabricated insertable into the housing assembly which is hinged after insertion at a separation point with the first assembly.
  • the second module is also referred to below as the articulated chain.
  • the contact pressure spring only has to apply the contact pressure and no longer has a double function.
  • the modular design of prefabricatable contact lever and link chain assembly allows a very simple installation.
  • the separation point is formed by a coupling point between a free end of the intermediate lever with a free end of the contact lever.
  • the coupling point can be formed, for example, by an integrally formed on a free end of the contact lever bolt, which engages in a mounted at a free end of the intermediate lever recess.
  • the two assemblies can be manufactured independently and pre-tested. By separating the "contact closure lever" functionality into two assemblies, each assembly is in itself less complex than an assembly that would incorporate all the functionality into a single assembly. As a result, each of the two assemblies according to the invention is easier and more reliable to manufacture.
  • the assembly takes place in the housing at the separation point. During assembly, only two assemblies need to be inserted into the housing to maintain functionality. This can be done either simply by hand or by means of a production machine. The requirements on the production machines are manageable, since only two modules must be handled and positioned, and not a large number of individual parts.
  • the attachment point of the second conductor piece is located on the contact carrier of the attachment point of the first movable conductor piece on the contact lever in the direction of current flow below the fixed contact piece.
  • the contact carrier has a first, plate-shaped portion and a second arcuate portion formed thereon, wherein the fixed contact piece is attached to the first plate-shaped portion and the attachment point of the second conductor portion near the free end of the arcuate portion is located.
  • the attachment point of the second conductor piece is located on the contact carrier from the attachment point of the first, movable conductor piece on the contact lever in the direction of current flow above the fixed contact piece.
  • the housing has a T-shape with a short longitudinal ridge and a wide crosspiece, the short longitudinal ridge provides the operating side with the switch knob, and wherein the rear derailleur and the pivot axis of the contact lever are arranged in the region of the short longitudinal ridge , and wherein the fixed contact piece is approximately in the middle of the wide Crosspiece is arranged.
  • the movement path of the contact lever in the open position is limited by abutment against a fixedly connected to the housing stop.
  • the stop takes the impulse of the contact lever.
  • the bracket in approximately a U-shape, with a connecting the two U-legs strap web and integrally formed on the free ends of the U-leg guide extensions.
  • the strap web is slidably guided in the slot of the ratchet lever.
  • the switch knob diametrically opposite the handle on two fork-shaped projections on which leave a receiving space open on one side therebetween, wherein in each of the two projections of the guide extensions of the bracket is pivotally held.
  • the intermediate lever at its end opposite the separation point on an expiring in two fork-shaped projections projections U - profile, and each of the two fork-shaped projections arranged has terminal detent openings.
  • the intermediate lever is articulated with the detent openings on the hoop web and engages with its fork-shaped projections the pawl lever.
  • a respective pin designed as a projection extension is formed on the latch lever, with which it is mounted in two housing half-shells.
  • the sinking of the contact lever towards the fixed contact piece by a stationary stop can be formed by a housing projection in a very advantageous embodiment of the invention. It can also be realized by a separate, but with the housing stationary and positive or even cohesively connected attachment.
  • the advantage of the invention limiting the Nachsinkens by a stationary stop is that no contact pressure is lost and an improved reproducibility of the limiting threshold from device to device can be achieved.
  • the function of the limitation of the Nachsinkens is inventively taken away from the slot and a separate component, the stop assigned. This can be optimized in terms of its location and embodiment towards its only function, so that a total of a load-break switch according to the invention has improved properties.
  • the position of the stop in the device corresponds to the path of movement of the release lever that the contact lever does not hinder pivoting of the release lever when abutting against the stop.
  • a switch-disconnector 10, as in FIG. 8 and in FIG. 1 shown as a section, has a housing which is composed of two housing halves, of which only the first housing half shell 11 is shown.
  • This housing half shell 11 has like the complementary, not shown, second housing half shell a front front wall 12 and two rear front walls 13, 13 ', of which in the FIG. 1 only a rear front wall 13 can be seen, the front side walls 14, 14 ', of which in the FIG. 1 only one front side wall 14 can be seen connected to each other.
  • the housing rear narrow side walls 15, 15 ', and a mounting side 16 and broad sides of the housing are in the illustration of FIG. 1 not to be seen.
  • each housing half-shell has a width which corresponds to one-half the standard module width.
  • the housing half-shell has in corresponding Make a dimension that is chosen so that it reaches the module width together with the lid.
  • the current path through the device extends from a first terminal 100, located on the left, via a first bus bar 124 of the terminal 100 and a first strand 102 to the contact lever 62.
  • the strand 102 is welded to the bus bar 124 and the contact lever 62, respectively.
  • closed contact point in FIG. 8 If the contact point is shown open, the movable contact piece 68 on the contact lever 62 is pressed by the contact pressure spring 69 against the fixed contact piece 70.
  • the fixed contact piece is located on a first, plate-shaped portion 107 of a contact carrier 106 referred to as the contact carrier. At the free end of the plate-shaped portion 107, an arcuate portion is formed, the opening facing upward.
  • the first plate-shaped portion 107 is in communication with another plate 122, which is oriented approximately parallel to the first plate-shaped portion 107 and to the right of this is at some distance.
  • another plate 122 At the lower free end of the plate 122 is horizontally angled an additional plate formed, which is referred to as FestWalletleitschiene 105.
  • the second terminal 101 On the right side of the housing is the second terminal 101 with a second bus bar 125, which is in the form of a double L.
  • a second strand 103 is welded, the second end is welded to the free end of the second busbar.
  • the current path then continues from the fixed contact piece 70 via the second strand 103 to the second terminal 101.
  • the second strand 103 runs approximately parallel to the fixed contact rail 105, at some distance from the latter.
  • a rear derailleur 123 In the upper housing portion, such as between the two front side walls 14, 14 ', there is a rear derailleur 123. This is coupled at one end to the contact lever 62, and at the other end with the switch knob 19. A pivoting of the switch knob 19 causes a Change of state of the derailleur 123 such that it acts with one of its levers on the contact lever 62 and this brings either in such a position that the spring 69 presses the contact lever 62 in an opening manner away from the fixed contact piece, or the contact lever brings in such a position in which the spring 69 can press the contact lever 62 in closing manner against the fixed contact piece.
  • the rear derailleur includes a Verklinkungsstelle that verklinkt to close the contact point and must be unlatched to open the contact point, and after the pivoting of the contact lever in the open position, as in the FIG. 8 shown, automatically latched again, so that it can be switched on again.
  • the derailleur 123 includes a bracket 27, a pawl lever 37, a trigger lever 40 and an intermediate lever 33. Structure and interaction of the various levers in the function of the derailleur are described below.
  • Opposite the Fest.leitschiene 105 is another guide rail 104. This has a first, horizontal portion 108 which is located near the mounting side 106. On the left of this, an obliquely upwardly extending second portion 109 is formed, which bends in the vicinity of the contact lever 62 and again extends downward in a third portion 110. Between the Fest.leitschiene 105 and the guide rail 104 thus a gap 85 is clamped. If a switching arc should occur during the contact opening, then one of its base points can commutate via the fixed contact horn onto the solid contact guide rail 105, and its second base point can commute to the guide rail 104. In the gap 85 of the switching arc is widened, making it easier and faster extinguished.
  • the switch knob 19 has an opening which can be regarded as a virtual axis of rotation of the switch knob.
  • On the switching handle 18 diametrically opposite side are two fork-shaped projections 21,22, of which in the illustration of FIG. 1 only one projection 21 is visible. In the perspective view of FIG. 6d Both fork-shaped projections 21, 22 can be seen.
  • the two projections 21, 23 leave between a one-sided open receiving space 23 free.
  • Each of the two projections 21, 22 has at its end remote from the handle 18 an eye-shaped opening 24, 25.
  • the longitudinal center axis of the handle 18 extends through the center of the eye-shaped openings 24, 25th
  • the eye-shaped opening 24 engages a leg 26 of a U-shaped bracket 27 with its molded guide extension 28, as shown in detail in the FIG. 4 shown.
  • the second leg 29 of the bracket 27 engages with its guide extension 128 in the eye-shaped opening 25 of the second projection 22 of the switch knob 19 a.
  • the intermediate lever 33 has at its one end in two fork-shaped projections 34, 35 expiring U-profile, each of the two fork-shaped projections 34,35 each terminal has a detent opening 31,32.
  • the bar web 30 engages in an oblong hole 36 of a latch lever 37 arranged below the intermediate lever 33 and partially in the U-profile recess between the two terminal projections 34, 35 of the intermediate lever 33 and through it.
  • the U-shaped bracket 27 is guided with its hoop web 30 in the slot 36 of the ratchet lever 37, and at the same time the intermediate lever 33 is articulated with its latching openings 31 and 32 on the hoop web 30.
  • the switch knob 19, the intermediate lever 33 and the latch lever 37 thus form a coupled together by the bracket 27 assembly.
  • a pin 38, 39 are integrally formed on both sides, with which it is stationary and rotatably mounted in a two-shell housing in two housing halves or in a single-shell housing with cover in the housing shell and the lid.
  • the longitudinal direction of the intermediate lever 33, the pawl lever 37 and the legs 26, 29 of the bracket 27 are parallel to the broad side of the device housing.
  • a release lever 40 is rotatably mounted. This is designed approximately L-shaped, see Fig. 6 , Wherein its first arm 41 has at its free end a joint head with a loop-shaped opening 42, with which it is rotatably mounted on the stationary shaft 20. Its second arm 43 is formed approximately at right angles to the first arm 42. The first arm 41 has approximately in its center a latching surface 44.
  • the first arm 41 of the release lever 40 carries a latching nose 45.
  • the release lever 40 is inserted with its first arm 41 into the receiving space 23 between the two fork-shaped projections 21, 22 of the switch knob 19, so that the central axis its eye-shaped opening 42 coincides with the central axis of the opening of the switch knob 19.
  • the opening of the shift lever is seated on a bead 120 surrounding the eye-shaped opening 42, on which it is rotatably held.
  • the release lever 40 is pivotally supported on the axis 20, and the switch knob 19 is pivotally supported on the release lever 40.
  • the detent 45 holds a spring 46 which is received in a recess 121. In this way, the release lever 40 is added by coupling the switch knob 19, the intermediate lever 33 and the pawl lever 37 formed on the bracket 27 assembly.
  • the latch lever 37 carries at its one free end a nose 49 which forms the Verklinkungsstelle of the switch lock together with the locking surface 44 on the release lever 40 in the Verklinkungswolf of the release lever 40.
  • the load-break switch 10 is shown with latched derailleur.
  • the release lever 40 is clockwise in the view after FIG. 3 pivoted on the pawl lever 37 out.
  • the release lever 40, the switch knob 19, the intermediate lever 33 and the pawl lever 37 thus form a coherent, vorfertigbare unit, which is also referred to below as the articulated chain 50.
  • the articulated chain 50 can be prefabricated and pre-tested as a separate unit.
  • FIG. 4 it is now the FIG. 4 considered, in which the individual steps in the assembly of the link chain 50 are shown in the form of an exploded view.
  • the bracket 27 is guided by a leg 29 through the slot 36, so that the strap web 30 is slidably guided in the slot 36 and the latch lever 37 between the two legs 26,29 of the bracket 27 runs.
  • the intermediate lever 33 is clipped with its terminal locking openings 31 on the hoop web 30 so that its terminal projections 34, 35 cover the latch lever 37 and include.
  • the bracket is 27 with its terminal on the legs 26,29 integrally formed mecanical arrangementsn 28, 128 inserted into the eye-shaped openings 24,25 on the projections 21,22 of the switch knob 19.
  • the release lever into which the spring arrangement 46 was previously inserted is inserted into the receiving space 23 between the fork-shaped projections 21, 22 of the control knob 19 and latched therein.
  • FIGS. 6a to 6d show more details of the spring assembly 46 and the assembly of the link chain 50.
  • the spring assembly 46 is a coil spring which is pushed in the region of the condyle of the free end of the first arm 41 of the trigger lever 40 on the outer peripheral surface of the joint head.
  • the condyle carries a roughly centered on its outer peripheral surface circumferential shoulder 51, which serves as a stop for the coil spring of the spring assembly 46. From the shoulder 51 extends toward the end face of the joint head indicative of a cup-shaped top surface 52, so that between the outer peripheral surface of the condyle and the top surface 52, a gap for receiving and guiding the spring assembly 46 is formed.
  • the front side of the top surface 52 extends in the manner of a slope 53 from the stop edge of the paragraph 51 to the front side of the eye-shaped opening 42 and runs there in an undercut, so that a retaining pocket 54 is formed for the spring arm 47 of the spring assembly 46.
  • FIG. 6a shows, is thus pushed onto the spring assembly 46 on the outer peripheral surface of the eye-shaped opening 42, so that the protruding spring arm 48 is held in a further undercut on the first arm 41 of the release lever 40.
  • the second protruding spring arm 47 forms at a relaxed spring assembly 46 with the first protruding spring arm 48 is approximately a right angle.
  • the second protruding spring arm 47 is pivoted along the slope 53 in a clockwise direction until it locks in the retaining pocket 54.
  • the spring assembly 46 is now biased. As shown in FIG.
  • the link chain 50 is assembled, its individual parts are hinged to each other, and the trigger lever 40 is biased in its Verklinkungsraum by the spring assembly 46.
  • the intermediate lever 33 has at its end remote from the bracket 27 a recess 60. At this recess, it is connected by means of a cylindrical pin 61 hinged to the contact lever 62.
  • the contact lever 62 is designed as a double-arm lever and rotatably mounted in a slot 66 on a fixedly connected to the first housing half-shell 11 axis 63, so that a first part lever 64 from the stationary axis 63 in the direction of the front front wall 12 points out, and a second Part lever 65 points from the stationary axis 63 in the direction of the attachment side of the housing. At the free end of the first partial lever 64 this carries the positively connected with him pin 61. The pin 61 thus forms the coupling point between the link chain 50 and the contact lever 62nd
  • the first part lever 64 has a U-shaped contour with a receiving space 67 formed by the leg extending approximately parallel to the broad sides of the housing, which opens in the direction of the front side wall 14, and whose one leg has a recess, so that the receiving space 67 is accessible from the broad side of the removed housing half shell with the housing open.
  • the second part lever 65 carries at its free end the movable contact piece 68th
  • a contact pressure spring 69 which crashes with one end on the front side wall 14 of the housing, and with its second end in the receiving space 67 of the first partial lever 64, the contact lever 62 about the stationary axis 63 in a clockwise direction, so that the movable Contact piece 68 is pushed away from the fixed contact piece 70.
  • the movement path of the contact lever 62 is limited by a fixedly connected to the first housing half-shell stop 71, in other words, in the off position of the contact lever 62 abuts against the stationary stop 71.
  • the fixed stop 71 is formed by a bolt integrally connected to the housing half shell, which can be produced, for example, together with the housing half-shells in an injection molding process.
  • FIG. 3 the load-break switch 10 is shown in the closed position.
  • the switching handle 18 is in the closed position, the nose 49 on the pawl lever 37 is latched to the locking surface 44 on the trigger lever 40.
  • the intermediate lever is blocked and the pin 61 at the coupling point between the link chain 50 and the contact lever 62 now forms the axis of rotation for the contact lever 62.Um this axis 61, the contact pressure spring 69 pushes the contact lever 62 counterclockwise, thus providing the contact between the movable contact piece 68 and the fixed contact piece 70 safely.
  • the opening movement of the contact lever 62 is limited by the stationary stop 71.
  • the advantage of the limitation by the fixed stop 71 is that the impulse when opening the contact lever 62 is received by the housing and not of parts of the switching mechanism. As a result, excessive mechanical stress on the switching parts are avoided, so that stress-induced distortions and displacements of the switching parts are also omitted and the mutual arrangement and position of the individual parts of the switching mechanism is maintained within the required for a reliable function narrow tolerance limits. In particular, this ensures that the contact opening distance can be defined and precisely adjusted and does not change over time due to mechanical distortions.
  • the switch lock and the contact lever 62 with the contact point are arranged together in a first half-space of the housing extending from an imaginary center plane perpendicular to the housing sides through the center of the axis 20 of the switch knob 19, extends to a narrow side of the housing.
  • a first half-space of the housing extending from an imaginary center plane perpendicular to the housing sides through the center of the axis 20 of the switch knob 19, extends to a narrow side of the housing.
  • an arc quenching device 85 In the other half space of the housing, which extends from the imaginary center plane to the opposite narrow side of the housing, there is room for an arc quenching device 85.
  • FIG. 2 An assembly step is shown in which the contact lever 62 with the contact pressure spring 69 is already inserted into the housing, but not yet the link chain 50.
  • the assembly is done in such a way that the contact lever 62 hinged with its slot 66 to the stationary axis 63 becomes.
  • the contact pressure spring 69 is used. It is helpful that the first part of lever 64 of the contact lever 62 at its one leg of the U-shaped contour a recess having. Thereby, the contact pressure spring 69 can be used in a simple way perpendicular to the housing broadside in the receiving space 67 of the first partial lever 64, in particular, this facilitates automatic assembly.
  • the contact pressure spring 69 is supported on a wedge-shaped projection 86 on the front side wall 14, wherein the inclination of the support surface 87 relative to the front side wall 14 is selected so that they approximately parallel to the web of the first partial lever 64 in the on position of the contact lever 62 , on which the contact pressure spring 69 is supported on the contact lever side, and thus the contact pressure spring 69 in the closed position of the contact lever 62 extends substantially in a straight line between the front side wall 14 and the contact lever 62. This ensures good force transmission from the contact pressure spring 69 to the contact lever 62 and thus a high contact pressure force at the contact point.
  • the contact lever is pressed by the contact pressure spring 69 with its second arm part 65 against the stop 71.
  • the contact lever 62 is thus in a clearly defined and stable position. This is important because it facilitates the insertion of the link chain 50 following the next assembly step.
  • the articulated chain 50 is now used so that it is articulated and pivotally mounted once on the stationary axis 20, and further with the recess 60 of the intermediate lever 33 on the pin 61 of the contact lever 62.
  • circuit breaker according to the invention is designed very easy to install.
  • FIG. 7 Here is a variant of a circuit breaker according to the invention is shown in a schematic representation, in which the sinking of the contact lever 162 toward the fixed contact piece 170 in the event that the thickness of the fixed and / or movable contact piece 168, 170 is greatly reduced by burning through a fixedly connected to the housing half shell 111 stop 90 is limited.
  • the stopper 90 is formed as a housing projection, which protrudes into the interior of the housing at the corresponding location, and is produced in the manufacture of the housing halves by injection molding together with all other Gezzauseanformungen in an injection molding process. He can also by one separate, but with the housing stationary and positive or even cohesively connected attachment be realized.
  • Reference numerals 162, 168, 170 designate the contact lever, the movable contact piece and the fixed contact piece with the contact point closed and with no reduction in thickness due to erosion.
  • the reference numerals 162a, 168a, 170a and in dashed lines designate the contact lever, the movable contact piece and the fixed contact piece with the contact point closed and with the reduction in thickness due to burnup. It can be seen that in the case of heavy burnup, the contact lever 162a has a greater distance from the front side wall 114 of the housing when the contact point is closed. Therefore, the contact pressure force of the contact pressure spring (in the FIG. 7 not shown).
  • the current path forms a loop in the area of the contact point.
  • the contact lever flows first from the attachment point of the first conductor piece 102 on the contact lever down to the movable contact piece 68, and on the other side, in the contact horn 106, it flows up again, from the movable contact piece 70 to the attachment point of second conductor 103.
  • It thereby forming short parallel pieces of current path, which are opposite flows through current, and in which therefore a repulsive force effect arises on each other. Since a switch-disconnector has no safety shutdown integrated, in particular no magnetic or thermal short-circuit or overcurrent trip such as a circuit breaker, there is no power interruption in case of short-circuit currents or high overcurrents. Due to the above-described effect of the parallel current path pieces, therefore, the movable contact tends to lift off the pad due to the repulsive force at high currents, whereby the contact resistance may increase and the pad may be thermally overloaded.
  • FIG. 9 shows an embodiment in which this effect is avoided.
  • the second conductor 103 ' is welded here at the free end of Festuttons 106. Now the current flows without reversal of direction from the attachment point of the first conductor piece 102 on the contact lever down to the movable contact piece 68, and further down to the attachment point of the second conductor 103 '. Only here does the second conductor 103 'again turn upwards. In the area of the contact point, there are no longer any parallel current path pieces. As a result, the repulsive force effect of the current in the event of a short circuit is significantly reduced and a secure locking of the contact point in the event of a short circuit or high overcurrent is achieved.
  • the second conductor 103 now traverses the region of the intermediate space 85, which is thus no longer available for a function as an extinguishing area. Accordingly, in the embodiment according to FIG. 9 also the Festromeleitschiene not available, because not needed.
  • the first conductor 102 must be a flexible conductor, a stranded wire.
  • the second conductor 103 ' may also be a flexible conductor, but it could also be provided at this point, a fixed busbar, since the second conductor 103' connects only fixed components together.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
  • Lock And Its Accessories (AREA)
  • Tumbler Switches (AREA)
EP12007930.6A 2011-12-23 2012-11-24 Commutateur de séparation de charge électrique pour basses tensions Withdrawn EP2608233A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE202011109576 2011-12-23
DE102012001336.1A DE102012001336B4 (de) 2012-01-25 2012-01-25 Elektrischer Lasttrennschalter für Niederspannung
DE201220001641 DE202012001641U1 (de) 2011-12-23 2012-02-17 Elektrischer Lasttrennschalter für Niederspannung

Publications (1)

Publication Number Publication Date
EP2608233A1 true EP2608233A1 (fr) 2013-06-26

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EP12007930.6A Withdrawn EP2608233A1 (fr) 2011-12-23 2012-11-24 Commutateur de séparation de charge électrique pour basses tensions

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EP (1) EP2608233A1 (fr)
CN (1) CN103177897A (fr)
AR (1) AR089315A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106128880A (zh) * 2015-05-07 2016-11-16 施耐德电器工业公司 用于控制电气保护单元的设备及包括其的电气保护单元

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017148804A1 (fr) * 2016-02-29 2017-09-08 Wöhner GmbH & Co. KG Elektrotechnische Systeme Interrupteur-sectionneur

Citations (7)

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US2096544A (en) * 1936-02-18 1937-10-19 Square D Co Circuit breaker
US2529754A (en) * 1942-12-24 1950-11-14 Square D Co Circuit breaker
DE1198909B (de) 1962-10-24 1965-08-19 Siemens Ag Niederspannungsschalter
DE29604726U1 (de) * 1996-03-14 1996-05-23 Kloeckner Moeller Gmbh Stromzuführung für armförmige bewegliche Kontakte eines Niederspannungs-Schutzschalters
DE102004001939A1 (de) 2004-01-14 2005-08-04 Abb Patent Gmbh Elektrisches Schaltgerät
EP1995754A1 (fr) * 2007-05-23 2008-11-26 Abb Ag Commutateur d'installation électrique
DE102009023557B3 (de) * 2009-05-30 2010-08-05 Abb Ag Elektrisches Schaltgerät mit einem thermischen Auslöser

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