EP0042113A2 - Interrupteur automatique - Google Patents

Interrupteur automatique Download PDF

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Publication number
EP0042113A2
EP0042113A2 EP81104307A EP81104307A EP0042113A2 EP 0042113 A2 EP0042113 A2 EP 0042113A2 EP 81104307 A EP81104307 A EP 81104307A EP 81104307 A EP81104307 A EP 81104307A EP 0042113 A2 EP0042113 A2 EP 0042113A2
Authority
EP
European Patent Office
Prior art keywords
contact
lever
release
switch
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
EP81104307A
Other languages
German (de)
English (en)
Other versions
EP0042113B1 (fr
EP0042113A3 (en
Inventor
Hermann Schmitt
Rudolf Sellner
Klaus Dipl.-Ing. Greefe
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.)
BBC Brown Boveri AG Germany
Original Assignee
Brown Boveri und Cie AG Germany
BBC Brown Boveri 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
Application filed by Brown Boveri und Cie AG Germany, BBC Brown Boveri AG Germany filed Critical Brown Boveri und Cie AG Germany
Priority to AT81104307T priority Critical patent/ATE16965T1/de
Publication of EP0042113A2 publication Critical patent/EP0042113A2/fr
Publication of EP0042113A3 publication Critical patent/EP0042113A3/de
Application granted granted Critical
Publication of EP0042113B1 publication Critical patent/EP0042113B1/fr
Expired 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
    • H01H71/12—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
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/20—Bridging contacts
    • H01H1/2066—Fork-shaped bridge; Two transversally connected contact arms bridging two fixed contacts
    • 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
    • H01H71/1081—Modifications for selective or back-up protection; Correlation between feeder and branch circuit breaker
    • 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
    • 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
    • H01H71/2463—Electromagnetic mechanisms with plunger type armatures

Definitions

  • the invention relates to a circuit breaker with an overload and a short-circuit current release, which act on a switch lock for the purpose of triggering a power interruption, with at least one contact point which is formed by at least one fixed contact piece and at least one movable contact piece fastened on a movably mounted contact lever and with at least one arc extinguishing device assigned to each of the contact points.
  • thermal bimetal is usually used as a thermal trigger, which bends when an overload current occurs, thereby causing the switching mechanism of a Switch lock unlatched and thus separates the contact lever or the movable contact piece from the fixed contact piece.
  • This thermal release is a so-called delayed release because it only responds to an overload current due to the heating up after a certain time.
  • a magnetic armature system is provided as the magnetic trigger, which responds practically without delay and without delay opens the contact point or unlatches the switch lock.
  • the circuit breaker can be connected downstream of a back-up fuse, whereby its triggering in the event of a short circuit in front of the consumer must take place in such a way that the back-up fuse does not respond either in the overload current range or in the short-circuit current range.
  • the opening device being designed such that it quickly switches the switch contacts through which the overcurrent flows opens at the different levels. It is also designed in such a way that it enables the contacts to be switched on again quickly when the current value falls below a predetermined value.
  • the trigger control has a counter which counts the successive opening and closing sequences of the contacts and which can trigger the triggering after a predetermined number of sequences, so as to keep the contacts of the corresponding switch open after the predetermined number of sequences. This means that the switch that is directly assigned to the consumer opens after a single opening.
  • the higher-level switch remains open after opening twice and the higher-level switch remains open after three times, and so on.
  • the problem here is that a resettable counting device is required for the implementation, which means that one has to develop and provide a mechanical or complicated electronic counting device with a network-independent, mechanical or electronic energy store.
  • the object of the invention is therefore to improve a self-switch, in particular for a selective protection device without a resettable counting device, and to provide a simple and advantageous structure. It is a further object of the invention to design the self-switch so that, from a certain short-circuit current level for the purpose of interrupting the current, the at least one switching contact point of the self-switch opens immediately and briefly, but closes again to a small value after the current has been interrupted or has decayed, that the switching lock is triggered when the overload or short-circuit current is present for a longer period of time and the at least one switching corrective position finally opens and that when a predetermined increased short-circuit current value is exceeded, the at least one switching contact point opens immediately and finally.
  • the auto switch has an additional impact armature system with a magnetic coil, a magnetic core, a magnet armature and a striking pin, that the striking pin strikes the movable contact lever directly and without delay in the event of short-circuit currents and thus proposes the at least one movable contact piece; the at least one stationary contact piece quickly and quickly detaches and that the short-circuit current release is designed as a selective protection release.
  • Selective protection trip means here a trip control which has a changeover device in the current path of the automatic switch which, when a short-circuit current occurs, at least partially switches the current to a parallel branch provided with a magnetic release, the parallel branch containing a device which, after passing through a predetermined pass value i 2 dt increases the current through the coil of the magnetic release so far that it triggers a switch lock which finally opens the at least one main contact point.
  • the contact system of the circuit breaker according to the invention can be opened without delay, briefly and without influencing the switch lock and trigger control, the switch lock allowing unimpeded contact opening and closing in the tensioned state.
  • a short-circuit current is only triggered by the selective protection release.
  • the particular advantage of the solution according to the invention emerges when the self-switch is used as a main circuit breaker in a selective protection arrangement in which a fuse, an inventive main circuit breaker and a circuit breaker assigned to each consumer are arranged between the network and at least one consumer.
  • a fuse an inventive main circuit breaker and a circuit breaker assigned to each consumer are arranged between the network and at least one consumer.
  • the contact system of the main circuit breaker according to the invention is closed again immediately after the short-circuit current has subsided, so that consumers arranged in parallel are not disconnected from the network.
  • the main circuit breaker trips using its selective protection release and switches all in parallel lying consumers.
  • a contact opening lever of the switch lock acts on the movable contact lever only when the switch lock is triggered and that the at least one movable contact piece lifts off the at least one stationary contact piece.
  • the automatic switch preferably has two main contact points which are electrically connected in pure form, each with an associated arc extinguishing device.
  • Claims 11 to 17 provide advantageous configurations of the contact lever and its suspension on the switching mechanism specified. Due to the described designs and suspension features of the contact lever, the latter can perform a pendulum movement, which ensures the same contact pressure force on both main contact points even with different contact erosion. Lie pendulum movement is favored by the formation of a narrow bearing point of the contact lever.
  • the proposed arrangement of the contact pressure spring ensures that the contact pressure force increases only insignificantly when the contact lever is deflected (opening of the contact point). This enables short contact opening times, particularly when the contact opening is brought about by the additional impact anchor system.
  • the switch lock has a double-leg contact opening lever, the two free leg ends of which each carry a nose, which engage at least behind one leg of an at least one leg contact lever, so that when the switch lock is triggered, the contact opening lever by means of its lugs detaches the contact lever from the closed position deflects and opens the main contact points.
  • This configuration enables the contact bridge to be moved out of its rest position (opening the contact point) either by the striker of the additional anchor system striking the contact bridge independently of the switch lock and deflecting it, or by the contact opening lever of the switch lock using its two Lugs line up the contact lever.
  • the bearing of the contact lever can advantageously be designed in such a way that the contact lever can be deflected to such an extent that the distance between the fixed contact pieces can exceed a contact opening dimension caused by the release of the switching lock. This occurs when the contact is opened using an impact anchor system and is advantageous because the current crossing is improved by large instantaneous contact distances.
  • each arc quenching device has a stack of quenching plates arranged between two arc guide rails, the deion plates of which protrude beyond the guide rail ends, so that the between the partial arcs burning from the deion sheets cannot be combined again into an arc behind the respective stack of quenching sheets.
  • the stack of quenching plates on the side facing away from the entry side of the arc can be covered by an insulating material plate, which preferably consists of a material that emits a lot of gas when heated, in particular plexiglass.
  • the outgassing creates a pressure, by means of which the arc is pushed back, so that an undesired emergence of the same from the stack of quenching plates is made more difficult. It also cools the arc.
  • the insulating material plate has openings for venting the arc chamber. Vent openings, which are formed like a labyrinth by offset webs in the switch housing on its side facing the at least one arc quenching device, serve to equalize the pressure.
  • an electrical circuit arrangement of the elements of the circuit breaker and a dimensioning instruction for the triggering elements of the short-circuit current release and the overload release which can in particular be bimetallic metals.
  • the resistance in the specified circuit arrangement advantageously consists of a chromium-aluminum alloy, which has a negative temperature coefficient.
  • the thermal bimetal downstream of the resistor is protected from larger overcurrents.
  • the bimetallic strip can be arranged in parallel and at a short distance from a connecting conductor. Due to the electrodynamic forces of a short-circuit current, the bimetallic metal is attracted by the connecting conductor piece, which causes its deflection Warming is supported.
  • the bimetallic strip consists at least partly of ferromagnetic material, e lektrodynamische attraction tends to occur.
  • FIG. 1 shows the interior of a self-switch according to the invention in an open, two-part, shell-shaped housing in a narrow construction, which is set up on its lower housing edge 10. Clamped in the area of a first connection. 11, a bolt anchor system 13 with a screw 12 is shown in section. This consists of a magnet coil 14, which is designed as a wire winding, an iron yoke 15, a hammer pin 16, a magnetic core, not shown, a magnet armature 17 and a metal sleeve 18, which is between the magnet coil 14 on the one hand and magnetic core and magnet armature 17 on the other hand and in which the magnet armature 17 moves.
  • the magnet armature 17 carries at its end protruding from the magnet coil 14 a permanent magnet bond, which consists of a permanent magnet 19 embedded in the magnet armature 17 and a ferromagnetic holding plate 20.
  • a permanent magnet bond which consists of a permanent magnet 19 embedded in the magnet armature 17 and a ferromagnetic holding plate 20.
  • One end 21 of the solenoid wire is connected to the first terminal 11.
  • an arc guide rail 23 is attached, which carries a stationary contact piece 24.
  • an arc extinguishing device which consists of the two guide rails 23 and 2G, the stack of extinguishing plates 27 in between, and an insulating plate 28 with openings 29.
  • the ends 30 of the deion plates of the stack of quenching plates 27 protrude beyond the ends 31 of the guide rails 23 and 26.
  • the arc chamber is covered by two ceramic plates 32, only one of which is visible.
  • a labyrinthine system of ventilation openings 33 which is formed by offset webs and enables gas pressure compensation.
  • Both light arc extinguishing devices are galvanically separated from each other by a partition made of insulating material. However, their two lower guide rails 26 are electrically connected to one another.
  • the upper guide rail of the rear arc device (not shown) (which corresponds to the guide rail 23) also carries a stationary contact piece (corresponding to the contact piece 24). It is connected to an insulated rigid connecting line 34 with the clamped end of a thermal bimetallic strip 35 which serves as an overload current release and which is fastened in the region of a second connecting terminal 40 approximately parallel to the housing wall.
  • a threaded hole is made into which an adjusting screw 36 accessible from the outside of the switch (through corresponding openings, not shown) is screwed.
  • the bimetal 35 bends with its free end towards the center of the switch, so that the adjusting screw 36 presses against a release lever 37 of the switching lock 49, which will be described below, and triggers it.
  • a flexible connecting line 38 is also attached, the other end of which is connected to a rigid connecting conductor piece 39.
  • the connecting conductor piece 39 leads to the second connection terminal 40.
  • the switch lock 49 of the automatic switch is described in detail with reference to FIGS. 6 to 8.
  • the manual control element 60 of the switch lock 49 protrudes upwards approximately in the middle from the switch front 91.
  • a sight glass 94 is embedded in the switch front 91, under which there is a switch position indicator 93 which is visible from the outside.
  • the switch position indicator 93 has a red and a green area and indicates the position of the movable contact pieces 42 (haptic contact point 25, 84 open or closed).
  • the contact lever 41 has a movable contact piece 42 on each of its two legs 59. With the two stationary contact pieces 24, these form two main contact points 25, 84, of which, however, only one is visible.
  • the short-circuit current release which is designed as a so-called selective protection release, is finally arranged in the area of the second connection terminal 40 between the switching lock 49 and the bimetallic strip 35 on the one hand and the lower housing edge 10 on the other hand. It consists of a helically wound resistance wire 43, a thermal bimetallic element (release element) 44, one end 45 of which is fastened in the switch housing, an auxiliary contact point 46 and a magnetic end release 47 designed as an anchor system.Electrically, these elements are connected to one another as follows: one end of the resistance wire 43 is soldered both to a flag 48 formed on the lower guide rail 26 and to the upper of the two housing boards 71, between which the switching mechanism 49 lies.
  • the other end of the resistance wire 43 is connected to the fixed, clamped end 45 of the bimetal 44.
  • the free end of the thermal bimetal 44 carries a first contact piece 50 of the auxiliary contact point 46.
  • the free end of the thermal bimetal 44 is connected to the connecting conductor piece 39 by a flexible connecting line 51.
  • the first contact piece 50 is opposite a second contact piece 52, which is fastened on a copper bracket 53 firmly clamped in the switch housing.
  • one end 54 of the coil wire of the magnetic trigger 47 is also attached.
  • the other end 55 of the coil wire is connected to the flag 48 and the lower guide rail 26.
  • the striking pin 56 of the in a magnetic yoke mounted magnetic end release 47 is aligned so that it also acts on the release lever 37 when the magnetic end release 47 is triggered, like the adjusting screw 36 of the thermobimetal 35.
  • the arrangement of the components of the circuit breaker shown in FIG. 1 represents a particularly favorable solution.
  • the assignment of the components is functional.
  • the electrical lines carrying the current are short.
  • the actuation of the contact lever 41 by the striking pin 16 or the actuation of the release lever 37 by the adjusting screw 36 of the thermobimetal 35 or the striking pin 56 takes place directly and without additional levers.
  • the space utilization in the switch housing is optimal.
  • the assembly of the components can be done easily. Flawless accessibility of the connection, setting and operating elements of the circuit breaker to be operated from the outside is guaranteed.
  • the mode of operation of the circuit breaker shown in FIG. 1 is described below.
  • the automatic switch is shown in the switched-on position in which the main contact points 25, 84 are closed.
  • the current to be monitored takes the following course within the circuit breaker: it enters the circuit breaker through the first connection terminal 11. It then flows through the magnet coil 14 of the impact armature system 13 via the first main contact point 25, then via the fork-shaped contact lever 41 to the second main contact point 84, which is not shown, then via the rigid connecting line 34 to the thermobimetal 35, through it the flexible connecting line 38 to the connecting conductor piece 39 and finally to the second connection terminal 40, from where the current leaves the automatic switch again.
  • a partial flow is branched on the contact lever 41. It flows via the housing plate 71 covering the switching lock to the resistor 43, through it into the thermobimetal 44 and is then also routed via the flexible connecting line 51 and the connecting conductor piece 39 to the second connecting terminal 40.
  • each an arc of which in each case projects from the movable contact piece 42 to the lower guide rail 26 is burning and the respective quenching plate stack 27 is driven.
  • the arcs are extinguished here, interrupting the current flow through the auto switch. Due to the series arrangement of two arc chambers, the total arc voltage is significantly above the nominal voltage, so that the arcs are quickly extinguished.
  • the magnet armature 17 tears itself away from the permanent magnet bond (which only allows tearing off at a certain, constant short-circuit current level), drives the striking pin 16, which strikes the contact lever 41 directly and without delay and the two movable contact pieces 42 from the fixed contact pieces 24 lifts off.
  • the switching lock 49 is not triggered here.
  • the contact opening lever 57 remains in its position.
  • two arcs form which run into the quenching stack 27.
  • the voltage drop across the main contact points 25, 84 increases considerably (light beam voltage). This results in an increased voltage drop across the short-circuit current release, which is connected in parallel to the main contact point 84 lying in series with the thermobimetal 35. This causes an increased current flow through the short-circuit current release, which causes the thermal bimetal 44 to heat up.
  • the thermal bimetal 44 is designed such that its temperature-related deflection does not lead to the closing of the auxiliary contact point 46 even with small short-circuit currents. This only happens if either the short-circuit current exceeds a predetermined value or if it is present for a longer period, that is, if a certain Duj chlass value i 2 dt is exceeded.
  • the forward value is not sufficient to close the auxiliary contact point 46, the short-circuit release does not release the switch lock 49. After the arcs have been extinguished or the switch current has dropped to a small value, the anchor system 13 drops and the contact lever 41 closes the main contact points 25, 84 again .
  • the auxiliary contact block G 46 is closed.
  • the magnetic final release 47 is thus t parallel to that with the Thermobimetal 44 main contact point 84 lying in series and virtually at the arc voltage of the concealed, not shown, arc chamber.
  • the arc voltage draws a current through the magnetic end release 47 and thus drives the striking pin 56, which acts on the release lever 37 of the switch lock 49 and releases the switch lock 49.
  • the double-leg contact opening lever 57 is pulled into the switching mechanism housing and prevents the main contact points 25, 84 from closing by means of its lugs 58, which hold back the double-leg contact lever 41.
  • the current flow through the circuit breaker is thus permanently interrupted.
  • the main contact points 25, 84 can only be closed again by actuating the manual actuating element 60.
  • an insulating plate 28 is attached, which preferably consists of a material that emits a lot of gas when heated, for example plexiglass.
  • This insulating material plate 28, which is shown in more detail in FIG. 9, has openings 29 at its edge for venting the arc chamber.
  • a pressure equalization with the switch exterior can over Vent openings 33, which are formed like a labyrinth by offset webs in the switch housing, are made.
  • the thermal bimetal 44 of the short-circuit current release is partially arranged parallel to the connecting conductor piece 39.
  • the bimetal 44 is ferromagnetic, it is attracted by the magnetic field of the current-carrying connecting piece 39. This supports the thermal deflection of the bimetallic 44 at high currents.
  • FIG. 3 shows the flow diagram for a self-switch according to the invention as described above.
  • This diagram is based on a selective protection arrangement (FIG. 2) in which a fuse SS, a main circuit breaker HS and a circuit breaker LS are fitted between the network N and a consumer VB.
  • FIG. 2 shows a selective protection arrangement
  • a fuse SS a fuse SS
  • main circuit breaker HS a circuit breaker LS
  • a circuit breaker LS are fitted between the network N and a consumer VB.
  • further miniature circuit breakers with consumers can be connected in parallel with the line circuit breaker LS.
  • the characteristic D SS of FIG. 3 represents the melting characteristic of the fuse SS.
  • the double-drawn characteristic D HS denotes the forward characteristic of a main line circuit breaker HS according to the invention and is clearly below the melting characteristic DSS of the fuse SS in the entire range shown.
  • the solid characteristic D LS is the pass characteristic of the line circuit breaker LS,
  • the current flow is only interrupted if the corresponding let-through value i 2 dt of the tripping characteristic AHS1 is exceeded for an overload current.
  • the impact armature system 13 responds and leads to an opening of the main contact points 25, 84.
  • the switch lock 49 is thus triggered at the same time, which leads to a permanent opening of the main contact points 25, 84.
  • the flow characteristic D ST shown in dashed lines is decisive for these switches.
  • the impact armature system 13 also opens the main contact points 25, 84 when an overcurrent which is greater than I B occurs.
  • the anchor system 13 does not trigger the switching lock 49, so that the main contact points 25, 84 close again after the overcurrent has subsided.
  • the switching lock 49 is only triggered when the bimetallic metal 44 of the short-circuit current release closes the auxiliary contact point 46 (at II K ).
  • the tripping characteristic of this bimetal 44 is shown in FIG. 3 with A HS2 . It is decisive in the current range between I B and I K for the passage of the circuit breaker according to the invention.
  • the pass characteristics D LS and D'LS represent the current limiting properties of a circuit breaker Characteristic D ' LS characterizes the properties of a miniature circuit breaker, the current-limiting effect of which is not supported by upstream miniature circuit breakers, while the lower solid characteristic curve D LS relates to a miniature circuit breaker LS which is connected upstream of a main miniature circuit breaker HS according to the invention. Below a current value I A , the tripping characteristic ALS of the overload current release of the miniature circuit breaker LS is decisive for the forward characteristic, while the short-circuit current release of the miniature circuit breaker LS takes effect at current values greater than I A.
  • FIG. 4 and FIG. 5 represent a fork-shaped and symmetrically designed contact lever 41. It consists of a U-shaped contact part 61, the two legs 59 of which support the movable contact pieces 42, and to the connecting leg 62 of which two angle pieces are fastened, the first of which each Angle leg 64 lies flat on the U-shaped contact part 61 and is connected to one another by means of rivets 65, and the second angle leg 66 of which lies perpendicular to the plane of symmetry 67. The two second angle legs 66 lying in the plane of symmetry 67 are connected to one another by means of rivets 68.
  • the contact lever 41 is rotatably mounted on a fixed axis 70 in its bearing 69.
  • the stationary axis 70 is fastened to the two printed circuit boards 71 covering the switching lock 49.
  • a pendulum axis 72 which has three grooves 73, engages on the two ends of the pendulum axis one end of a contact pressure tension spring 74 is suspended.
  • the respective other ends of the contact pressure tension springs 74 are each suspended in a fixed abutment 75 formed on the circuit boards 71.
  • the contact pressure tension spring 74 presses the contact lever 41 against the stationary contact piece 24.
  • the contact pressure tension spring 74 is in this case pretensioned.
  • the connecting line between the bearing point of the pendulum axis 72 and the bearing point 69 of the contact lever 41 and the connecting line between the bearing point of the pendulum axis 72 and the fixed abutment 75 form an acute angle.
  • the pendulum movement is favored by the formation of a narrow bearing point 69, the width of which can be less than 2 mm. This ensures a constant contact pressure force on both main contact points 25, 84.
  • the pendulum bearing also enables compensation for different contact erosion.
  • FIG. 6, FIG. 7 and FIG. 8 show the switch lock 49 in different switching states.
  • FIG. 6 shows this like the switch lock 49 in the tensioned state
  • FIG. 7 shows it in the released state
  • FIG. 8 shows it in the tensioned state, but with open main contact points 25, 84, which is caused by the action of the striking pin 16 of the striking anchor system 13.
  • the operation of the switching mechanism is as follows.
  • the release always takes place via the release lever 37 or the manual actuating element 60.
  • the pawl lever 89 is released and rotates in the direction of arrow B.
  • the axis 76 of the first knee joint consisting of two tabs 77, 78 is released and slides upward in the slot 79 in the pawl lever 89.
  • the manual actuator 60 rotates under the action of a spring (not shown) in the direction of arrow C into its switch-off position (FIG. 7).
  • the second knee joint consisting of the contact opening lever 57 and a tab 80, buckles under the action of the switch tension spring 81, in which the axis 82 migrates upward.
  • the double-leg contact opening lever 57 has at its free leg ends a nose 58, which engages behind one leg 59 of the contact lever 41.
  • the contact opening lever 57 is guided in the elongated hole 83 and, by means of its lugs 58, pulls the fork-shaped contact lever 41 with the movable contact pieces 42 away from the stationary contact pieces 24, whereby the main contact points 25, 84 are opened.
  • FIG. 7 shows the release of the switching lock 49, the latch lever 89 again being in its state ready for latching.
  • the triggering of the switching lock 49 is only effected by the thermobimetal 35 or the striker pin 56 of the magnetic final release 47, that is to say when an overcurrent or a short-circuit current occurs, the transmission value of which is greater than D K (see FIG. 3).
  • the main contact points 25, 84 are opened. This is done, as shown in Figure 8, in that the striking pin 16 of the striking anchor system 13 directly on the connecting leg 62 of the U-shaped contact Part 61 ( Figure 5) strikes and thus lifts the contact lever 41 with the movable contact pieces 42 from the fixed contact pieces 24. This does not trigger the switch lock 49.
  • the suspension of the contact lever 41 on the boards 71 of the key switch 49 is designed such that the contact lever 41 can deflect further by the striking pin 16 than is possible when the contact opening lever 57 makes contact by means of the lugs 58 thereof.
  • the instantaneous arc gap is increased in the event of short-circuit currents. This leads to an improved current limitation.
  • a coupling axis 95 is mounted, on which a lever 96 is formed, which engages behind an end 97 of the release lever 37.
  • the coupling axis 95 can serve as a connecting link to neighboring circuit breakers.
  • FIG. 9 shows an insulating material plate 28 which is shown on an enlarged scale and which is attached to the ends 30 of the deion sheets in order to avoid arcing.
  • the insulating plate 28 has openings 29 on all sides, which serve to vent the arc chamber.
  • the insulating plate 28 is made of plexiglass. This material is highly gassing when heated and thus causes an increase in pressure in the arc quenching chamber and an intensive cooling of the arc when an arc occurs in the arc quenching chamber, thus supporting the quenching effect.
  • FIG. 10 shows a circuit diagram of a circuit breaker according to the invention.
  • the current enters the switch circuit via a first connection terminal 11. It flows through the impact anchor system 13 to the first main contact point 25, which is shown in the open state and which is connected in parallel with an arc extinguishing device with arc guide rails 23, 26 and a stack of quenching plates 27.
  • a second main contact point 84 which is constructed identically to the first main contact point 25, is connected in series to this first main contact point 25. Both main contact points 25, 84 are connected to one another by a rigid contact lever 41.
  • the current path leads via a connecting line 34 to a thermobimetal 35, from there via a flexible connecting line 38 to a rigid connecting conductor piece 39 and the second connecting terminal 40.
  • a connecting line 34 to a thermobimetal 35
  • a flexible connecting line 38 to a rigid connecting conductor piece 39 and the second connecting terminal 40.
  • an as Flag 48 trained soldering base at which a portion of the current is branched off. This flows through a resistor 43 with a positive temperature coefficient, a thermobimetal 44, a flexible connecting line 51 to the second connection terminal 40.
  • one end 54 of the coil wire of a magnetic end trigger 47 is fastened to the flag.
  • the other end 55 of the coil wire leads to a fixed contact piece 52 which is opposite a contact piece 50 which is attached to the free end of the thermobimetal 44.
  • the two contact pieces 50, 52 form an auxiliary contact point 46 shown in the open state.
  • the arrangement consisting of resistor 43, bimetallic 44, magnetic end release 47 and auxiliary contact point 46 is referred to here as a selective protection release.
  • the mode of operation of the arrangement indicated by the circuit diagram is as follows: If an overload current flows through the arrangement - via the impact anchor system 13, the two main contact points 25, 84 and the thermobimetal 35 - this directs it T indicates hermobimetall 35 and causes, such as the line of action 85, a triggering of the switching mechanism 49. This results in a permanent opening of the main contact points 25,84. In the event of a short-circuit current, the impact anchor system 13, as the action line 86 indicates, causes the main contact points 25, 84 to be opened immediately and directly.
  • the selective protection release is only effective if the main contact points 25, 84 are open in the event of a short-circuit current and an arc is burning and if the transmission value of a short-circuit current exceeds a predetermined value (transmission value D K in FIG. 3). This can either be the case if the short-circuit current is very large, or if the short-circuit current occurs continuously for a long time or in short successive intervals.
  • the ThermobimetaJl 44 then deflects so far that the auxiliary contact point 46 is closed. In this case, the magnetic end release 47 is switched into the auxiliary circuit. It speaks and triggers the switching lock 49, as the action line 87 indicates. As in the case of an overcurrent, this (line of action 88) also leads to a permanent opening of the main contact points 25, 84.
  • the main contact points 25, 84 can then only be closed by the manual actuating member 60 via the switching lock 49.
  • the thermal bimetal 44 of the selective protection release is more sensitive than the thermal bimetal 35, which lies in the main circuit.
  • the positive temperature coefficient of the resistor 43 protects the thermobint metal 44 from large overcurrents.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Breakers (AREA)
  • Confectionery (AREA)
  • Control Of Eletrric Generators (AREA)
  • Percussive Tools And Related Accessories (AREA)
EP81104307A 1980-06-11 1981-06-04 Interrupteur automatique Expired EP0042113B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81104307T ATE16965T1 (de) 1980-06-11 1981-06-04 Selbstschalter.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19803021867 DE3021867A1 (de) 1980-06-11 1980-06-11 Selbstschalter
DE3021867 1980-06-11

Publications (3)

Publication Number Publication Date
EP0042113A2 true EP0042113A2 (fr) 1981-12-23
EP0042113A3 EP0042113A3 (en) 1982-05-12
EP0042113B1 EP0042113B1 (fr) 1985-12-11

Family

ID=6104345

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81104307A Expired EP0042113B1 (fr) 1980-06-11 1981-06-04 Interrupteur automatique

Country Status (5)

Country Link
US (1) US4417222A (fr)
EP (1) EP0042113B1 (fr)
JP (1) JPS5727528A (fr)
AT (1) ATE16965T1 (fr)
DE (1) DE3021867A1 (fr)

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FR2527003A1 (fr) * 1982-05-15 1983-11-18 Hager Electro Gmbh & Co Disjoncteur de protection de lignes et/ou d'appareils contre des surintensites et des courts-circuits
EP0096601A1 (fr) * 1982-05-17 1983-12-21 Merlin Gerin Bloc fonctionnel de distribution terminale basse tension
FR2531581A1 (fr) * 1982-08-09 1984-02-10 Merlin Gerin Tableau de distribution terminale basse tension
EP0350829A2 (fr) * 1988-07-15 1990-01-17 Asea Brown Boveri Aktiengesellschaft Dispositif sélectif de protection contre les courants de court-circuit
EP2330611A1 (fr) * 2009-12-04 2011-06-08 HAGER ELECTRO S.A.S. (société par Actions Simplifiée) Disjoncteur sélectif
US9543088B2 (en) 2011-12-19 2017-01-10 Sma Solar Technology Ag Circuit arrangement for suppressing an arc occurring over a contact gap of a switching member

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JPS58169736A (ja) * 1982-03-31 1983-10-06 松下電工株式会社 回路遮断器
DE3316230C2 (de) * 1982-05-15 1985-04-25 Hager Electro GmbH + Co, 6601 Ensheim Schutzschalter gegen Überstrom und Kurzschluß
US4491814A (en) * 1983-04-14 1985-01-01 Gte Laboratories Incorporated Circuit breaker
JPS6030027A (ja) * 1983-07-29 1985-02-15 株式会社日立製作所 しや断器の操作機構
JPS6038456U (ja) * 1983-08-24 1985-03-16 三菱電機株式会社 回路しや断器
JPS60250539A (ja) * 1984-05-25 1985-12-11 松下電工株式会社 回路遮断器の連動引き外し機構
US4616200A (en) * 1984-09-12 1986-10-07 Square D Company Circuit breaker
WO1988006801A1 (fr) * 1987-02-24 1988-09-07 Vsesojuzny Nauchno-Issledovatelsky I Proektno-Kons Interrupteur limiteur de courant
DE19517634C2 (de) * 1995-05-13 2002-01-31 Abb Patent Gmbh Elektrisches Installationsschaltgerät
DE19526592C2 (de) * 1995-07-21 1999-04-15 Abb Patent Gmbh Elektrischer Schalter, insbesondere Leitungsschutzschalter
US5844188A (en) * 1996-12-19 1998-12-01 Siemens Energy & Automation, Inc. Circuit breaker with improved trip mechanism
US6087914A (en) * 1996-12-19 2000-07-11 Siemens Energy & Automation, Inc. Circuit breaker combination thermal and magnetic trip actuator
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US5894260A (en) * 1996-12-19 1999-04-13 Siemens Energy & Automation, Inc. Thermal sensing bi-metal trip actuator for a circuit breaker
DE19954037A1 (de) * 1999-10-29 2001-05-03 Siemens Ag Verfahren zum Überwachen der Funktionsfähigkeit eines Bauelementes eines elektrischen Gerätes während des Betriebes
DE10118746B4 (de) * 2001-04-17 2004-06-24 Siemens Ag Verfahren zum Betreiben eines Schaltgerätes mit einem zuschaltbaren Strombegrenzer und zugehörige Anordnung
DE10119626A1 (de) * 2001-04-20 2002-11-28 Abb Patent Gmbh Installationsschaltgerät
US6636133B2 (en) * 2001-09-14 2003-10-21 Square D Company PTC terminals
DE10261994A1 (de) * 2002-01-30 2004-02-05 Abb Patent Gmbh Selektivschutzschalter und Verfahren zur selektiven Kurzschlussstromabschaltung
DE102004019175A1 (de) * 2004-04-16 2005-11-03 Abb Patent Gmbh Installationsschaltgerät
DE102004055564B4 (de) * 2004-11-18 2022-05-05 Abb Ag Elektrisches Installationsschaltgerät
DE102006037234A1 (de) * 2006-08-09 2008-02-14 Siemens Ag Schalt-Einheit
DE102006037230A1 (de) * 2006-08-09 2008-02-14 Siemens Ag Schalteinrichtung zum selektiven Abschalten mit einer induktiven Auslöseeinheit
DE102008017472A1 (de) * 2007-04-28 2008-11-06 Abb Ag Installationsschaltgerät
EP1995754B1 (fr) * 2007-05-23 2013-09-04 Abb Ag Commutateur d'installation électrique
DE102010004641B4 (de) * 2009-04-23 2021-02-18 Abb Ag Elektromagnetisches Auslösesystem und Installationsschaltgerät mit einem elektromagnetischen Auslösesystem
DE102009023556B4 (de) * 2009-05-30 2012-01-19 Abb Ag Elektrisches Schaltgerät mit einem thermischen Auslöser
ES2447370T3 (es) * 2009-12-29 2014-03-11 Abb Technology Ag Disyuntor de media tensión
DE102011008834A1 (de) * 2011-01-19 2012-07-19 Abb Ag Installationsschaltgerät
ES2600962T3 (es) * 2011-09-21 2017-02-13 Siemens Aktiengesellschaft Interruptor de potencia con canales de ventilación para una evacuación eficiente del calor
US8836453B2 (en) * 2011-10-07 2014-09-16 Siemens Industry, Inc. Electronic circuit breaker, electronic circuit breaker subassembly, circuit breaker secondary electrical contact assembly, and powering methods
CN102915890B (zh) * 2012-10-25 2015-04-22 温州市新蓝天电器有限公司 一种撬板脱扣断路器
KR101869724B1 (ko) * 2017-01-05 2018-06-21 엘에스산전 주식회사 회로차단기의 전자 트립 장치
KR102299858B1 (ko) * 2017-03-15 2021-09-08 엘에스일렉트릭 (주) 회로차단기의 전자 트립 장치
US10468219B2 (en) * 2017-09-07 2019-11-05 Carling Technologies, Inc. Circuit interrupter with status indication
US10847333B2 (en) * 2018-09-17 2020-11-24 Siemends Industry, Inc. Circuit breakers including dual triggering devices and methods of operating same
GB2591796A (en) * 2020-02-07 2021-08-11 Eaton Intelligent Power Ltd Circuit breaker and method for operating a circuit breaker

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CH543173A (de) * 1971-09-30 1973-10-15 Carl Maier & Cie Elek Sche Sch Leitungsschutzschalter
DE2158749C3 (de) * 1971-09-30 1975-01-09 Carl Maier + Cie, Schaffhausen (Schweiz) Leitungsschutzschalter
DE2525192A1 (de) * 1973-12-20 1976-12-23 Merlin Gerin Selektivschutzvorrichtung
DD133503A1 (de) * 1977-09-19 1979-01-03 Keitel,Juergen,Dd Einrichtung zum selektiven kurzschlussschutz
EP0013320A1 (fr) * 1978-12-18 1980-07-23 BROWN, BOVERI & CIE Aktiengesellschaft Mannheim Interrupteur de protection de ligne principale utilisé comme interrupteur de protection de groupe

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2527003A1 (fr) * 1982-05-15 1983-11-18 Hager Electro Gmbh & Co Disjoncteur de protection de lignes et/ou d'appareils contre des surintensites et des courts-circuits
EP0096601A1 (fr) * 1982-05-17 1983-12-21 Merlin Gerin Bloc fonctionnel de distribution terminale basse tension
FR2531581A1 (fr) * 1982-08-09 1984-02-10 Merlin Gerin Tableau de distribution terminale basse tension
EP0350829A2 (fr) * 1988-07-15 1990-01-17 Asea Brown Boveri Aktiengesellschaft Dispositif sélectif de protection contre les courants de court-circuit
EP0350829A3 (fr) * 1988-07-15 1991-07-17 Asea Brown Boveri Aktiengesellschaft Dispositif sélectif de protection contre les courants de court-circuit
EP2330611A1 (fr) * 2009-12-04 2011-06-08 HAGER ELECTRO S.A.S. (société par Actions Simplifiée) Disjoncteur sélectif
US9543088B2 (en) 2011-12-19 2017-01-10 Sma Solar Technology Ag Circuit arrangement for suppressing an arc occurring over a contact gap of a switching member

Also Published As

Publication number Publication date
JPS64778B2 (fr) 1989-01-09
US4417222A (en) 1983-11-22
EP0042113B1 (fr) 1985-12-11
EP0042113A3 (en) 1982-05-12
DE3021867C2 (fr) 1989-01-12
DE3021867A1 (de) 1981-12-17
JPS5727528A (en) 1982-02-13
ATE16965T1 (de) 1985-12-15

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