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EP0317660B1 - Contactor - Google Patents

Contactor Download PDF

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Publication number
EP0317660B1
EP0317660B1 EP87117364A EP87117364A EP0317660B1 EP 0317660 B1 EP0317660 B1 EP 0317660B1 EP 87117364 A EP87117364 A EP 87117364A EP 87117364 A EP87117364 A EP 87117364A EP 0317660 B1 EP0317660 B1 EP 0317660B1
Authority
EP
European Patent Office
Prior art keywords
contact
contactor according
slide
contactor
angle member
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP87117364A
Other languages
German (de)
French (fr)
Other versions
EP0317660A1 (en
Inventor
Helmut Lemmer
Josef Risthaus
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.)
Square D Co Deutschland GmbH
Original Assignee
Square D Co Deutschland GmbH
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 Square D Co Deutschland GmbH filed Critical Square D Co Deutschland GmbH
Priority to ES198787117364T priority Critical patent/ES2035843T3/en
Priority to AT87117364T priority patent/ATE82087T1/en
Priority to EP87117364A priority patent/EP0317660B1/en
Priority to DE8787117364T priority patent/DE3782499D1/en
Priority to CN88103874.1A priority patent/CN1033337A/en
Priority to CA000582438A priority patent/CA1295358C/en
Priority to AU24994/88A priority patent/AU608488B2/en
Priority to US07/272,289 priority patent/US4931757A/en
Priority to NO885256A priority patent/NO171526C/en
Priority to DK655388A priority patent/DK655388A/en
Priority to BR888806185A priority patent/BR8806185A/en
Publication of EP0317660A1 publication Critical patent/EP0317660A1/en
Application granted granted Critical
Publication of EP0317660B1 publication Critical patent/EP0317660B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H89/00Combinations of two or more different basic types of electric switches, relays, selectors and emergency protective devices, not covered by any single one of the other main groups of this subclass
    • H01H89/06Combination of a manual reset circuit with a contactor, i.e. the same circuit controlled by both a protective and a remote control device
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00Mechanisms for operating contacts
    • H01H3/001Means for preventing or breaking contact-welding
    • H01H2003/002Means for preventing or breaking contact-welding with lockout, e.g. two contact pairs in series
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H89/00Combinations of two or more different basic types of electric switches, relays, selectors and emergency protective devices, not covered by any single one of the other main groups of this subclass
    • H01H89/06Combination of a manual reset circuit with a contactor, i.e. the same circuit controlled by both a protective and a remote control device
    • H01H2089/065Coordination between protection and remote control, e.g. protection job repartition, mutual assistance or monitoring
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00Details of electromagnetic relays
    • H01H50/44Magnetic coils or windings
    • H01H50/443Connections to coils
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/02Housings; Casings; Bases; Mountings
    • H01H71/0207Mounting or assembling the different parts of the circuit breaker
    • H01H71/0228Mounting or assembling the different parts of the circuit breaker having provisions for interchangeable or replaceable parts
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10Operating or release mechanisms
    • H01H71/12Automatic release mechanisms with or without manual release
    • H01H71/14Electrothermal mechanisms
    • H01H71/16Electrothermal mechanisms with bimetal element
    • H01H71/162Electrothermal mechanisms with bimetal element with compensation for ambient temperature
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10Operating or release mechanisms
    • H01H71/12Automatic release mechanisms with or without manual release
    • H01H71/40Combined electrothermal and electromagnetic mechanisms
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10Operating or release mechanisms
    • H01H71/12Automatic release mechanisms with or without manual release
    • H01H71/46Automatic release mechanisms with or without manual release having means for operating auxiliary contacts additional to the main contacts

Definitions

  • the invention relates to a contactor with a housing, in which a magnetic system and at a distance from the mounting side a main system with main contacts with double contact interruption having contact system are housed, on the mounting side to a magnet system, thermal triggers and also within the housing for each phase Magnetic triggers are provided, which act on the contact system by means of an actuating device and are based on EP-A-0 185 107.
  • a motor protection device normally consists of a contactor, to which a separate thermal motor protection is assigned, which is housed in a special housing.
  • the entire contact system and the magnet system by which the contact system is actuated are then accommodated in a single housing, specifically the magnet system is either on the mounting side of the contact system or on the side of the contact system remote from the mounting side, that is to say above it arranged.
  • the movable armature of the magnet system is connected to the contact bridge holder of the contact system via a coupling.
  • a thermal motor protection part is also accommodated in the housing, which only triggers if the current load or thermal load exceeds a certain level.
  • Another contactor known from EP-A-0 185 107 is of relatively compact design due to its construction, so it requires only little space on a mounting wall or in the control cabinet and the wiring can be carried out largely within the contactor.
  • short-circuit fast triggers or magnetic triggers are also provided, which act on a switch lock and thus on the contact system and, in the given case, switch off the motor protection switch.
  • An undervoltage or shunt release can also be provided.
  • the main disadvantage of this contactor serving as a motor protection switch is that it can only be switched on manually by means of the switch-on button and a deliberate switch-off can only be carried out manually by means of a switch-off button, apart from the automatic switch-off by the motor protection described.
  • EP-A-0 237 607 In order to create a contactor that is as compact as possible with the least possible external wiring effort, it was proposed in EP-A-0 237 607 to provide a contact system in a housing near the mounting side and an actuating device vertically above it, with one side of the actuating device at each phase Thermal triggers and magnetic triggers are arranged, which are operatively connected to the actuator. On the other side of the actuating device, an electromagnetic drive is arranged, the armature of which is connected to an extension piece of a common contact bridge holder of the contact system via articulated toggle levers. A slide is also provided, on which the toggle levers on the one hand and the thermal and magnetic triggers on the other hand engage.
  • a mechanical device with two rockers is activated, so that the circuit of the coil of the electromagnet is interrupted, the armature drops and the contact bridges are opened in the other phases .
  • a thermal release is also provided, which can also switch off the motor protection switch in the event of a fault via the mechanical actuation device.
  • the invention is based on the object of creating a compact contactor with little external wiring with integrated thermal and magnetic triggers, which ensures great switching reliability.
  • the additional contacts can remain closed during the normal switching operation of the contactor, they are therefore subject to virtually no wear, so that there is no danger of these additional contacts being welded for this reason. Even this danger is eliminated in that the additional contacts are forcibly opened in the event of an overload.
  • FIGS. 1 to 4 For the sake of clarity, individual parts of the contactor according to the invention are drawn out in FIGS. 1 to 4, while FIG. 5 illustrates a longitudinal section through the entire contactor composed of the individual parts according to FIGS. 1 to 4.
  • the actual contactor 1 according to FIG. 1 has a lower housing part 2 and an upper housing part 3 with a division plane 4 which runs perpendicular to the image plane of FIG. 1.
  • the housing parts can be connected to one another by conventional screwing.
  • clamp-like connecting springs 10 with a crank 11 at the lower end and a support bow 12 at the upper end, so that a simple tool-free clamping of the housing parts is made possible, so that both simple assembly and disassembly is achieved.
  • the lower housing part 2 has a lower fastening plate on the fastening side, which is provided with a quick fastener (not shown in detail) and is used for connection to a standard mounting rail.
  • the magnet system consists of a core 6 with short-circuit rings 8 and 9, which is fastened in the lower housing part 2, and an armature 7 and a coil 13 movable in the upper housing part 3.
  • the armature 7 is fastened to a connecting piece 14, from which lateral guide tabs 15 extend that enclose the anchor laterally.
  • a plunger 16 is connected, which is extended upwards to a contact bridge holder and ends with a pushbutton 17 which protrudes outwards through an opening in the upper housing part and the height of which indicates the switching status of the contactor.
  • a contact bridge 19 with movable contact pieces 20, 21 is arranged so as to be vertically movable.
  • the contact bridge 19 is under the pressure of a helical compression spring 22 with the interposition of a further bow spring 23, which serves for better mounting and guidance.
  • Fixed contact rails 24 with fixed contact pieces are arranged to the contact bridge, of which only one rail is shown in FIG. 1. This leads to a terminal 26, which in turn carries a contact terminal screw 27. The terminal 26 is used to connect the external wiring, not shown.
  • Figure 2 shows some additions compared to Figure 1. As for the shooter part of Figure 1, it agrees with Figure 2 and the same reference numerals have been used for the same parts.
  • 2 shows a further U-shaped fixed contact rail 29 with a fixed contact piece 28 on the upper side of the web 30 of the fixed contact rail 29.
  • One end of a tension spring 35 is fastened to the lower end of the leg 31, while the other end of the tension spring is fastened to a pivotable one Contact rail 33 attacks.
  • the pivot bearing of the contact rail 33 is located on the outside of the lower end of the leg 32, but with a certain small distance above the center line or pull line of the tension spring 35. In the drawn position, the contact rail 33 with the movable contact piece 34 is by the tension spring 35 pressed down.
  • the contact rail is moved counterclockwise around the pivot bearing, so that the tension spring also moves over the corresponding dead center and then contributes to the sudden opening of the contact, until the contact rail is in the dot-dash position 33a.
  • FIG. 3 shows a vertical section through the upper housing part 3, but compared to FIGS. 1 and 2 not in one plane of a phase, but in a plane in which the coil connections are located.
  • the coil connections are of course only on one level, since only two connections are required.
  • the coil connection screws 37 and 39 are accessible from above through holes for a screwdriver, the holes also serving as guides for the screwdriver.
  • coil connecting rails 40 and 41 with vertical legs 42 and 43 are provided, the latter being connected to the coil.
  • the coil connecting wires are not directly connected to the legs 42 and 43, but there are advantageously mutually not shown spring pieces that meet when the upper housing part 3 is placed on the lower housing part 2 and ensure a safe current transfer and at the same time facilitate assembly and disassembly. It is of particular importance that In the current path of the coil connections, an additional contact that is forcibly opened is provided. This additional contact is formed by a fixed contact piece 46 and a movable contact piece 47.
  • the fixed contact piece 46 is attached to the top of a right-angled leg of the coil connecting rail 41, while the movable contact piece 47 is attached to the outer end of a contact spring clip 44.
  • the contact end bracket is attached with its right end to a right-angled rail 45, which in turn is electrically conductively connected to the coil terminal 38.
  • FIG. 49 denotes a magnetic release, which essentially consists of a coil carrier 50, a coil 51 and a fastening part 52.
  • an armature 53 is arranged axially displaceably, which has a window at the lower end and, as described below, interacts with an actuating device.
  • the actuating device has a first angle piece 54 with a left leg 55.
  • the angle piece has a web 58.
  • the pivot bearing for the angle piece is provided with the reference number 57.
  • the web 58 At its outer, lower end the web 58 has an angled part 59 with a lug 60.
  • a pressure spring 61 engages on the web 58, the other end of which is supported on the inner wall of the housing 87 and which tries to turn the angle piece 54 in the bearing 57 in a clockwise direction to pan.
  • a second angle piece 62 Below the first angle piece 54 there is a second angle piece 62, one leg 63 of which engages in the window 90 of the armature 53.
  • the angle piece 62 is held in a pivot bearing 64 and it has a step 65.
  • a compensation strip 66 is also attached to the angle piece 62, the lower free end of which rests on a spherical projection 68 of a lever arm 67 and serves for compensation with respect to the room temperature.
  • the compensation strip 66 and the lever arm 67 are provided only once, while all the other parts which have been explained so far with reference to FIG. 4 and also explained below in this regard are provided in triplicate, as will be explained further below.
  • the lever arm 67 is attached to a third angle piece 70 at 69.
  • This angle piece 70 is connected at 71 to the upper angle piece 62.
  • the outwardly angled leg of the angle piece 70 has an opening or a slot into which a web 72 of a thermal release 73 engages from above.
  • the thermal trigger is attached to its upper end by a bracket 74.
  • a fixed contact piece 76 of a fixed contact rail 77 is also shown.
  • This fixed contact rail 77 is essentially C-shaped and its leg 78 leads to a clamp 79 with a contact connection screw 80.
  • the fixed contact piece 76 interacts with the movable contact piece 34 of the contact rail 33 already described. So this is an additional one Contact for one phase each, for a total of three additional contacts.
  • the mode of operation of the device according to FIG. 4 is essentially as follows. If an overcurrent suddenly occurs, for example from ten times the nominal current to a short circuit, the magnetic release 49 in the relevant phase comes into operation, that is to say the armature 53 is suddenly pulled up, so that the leg 63 of the second angle piece 62 about the pivot bearing 64 moves in the clockwise direction and the nose 60 is free relative to the step 65, so that the compression spring 61 also swings the first angle piece 54 around the bearing 57 in a clockwise direction. The left end of the leg 55 of the angle piece 54 engages in the slide 48, so that it is moved upward and triggers a double function, which will be explained in more detail below.
  • a similar process takes place when a thermal release 73 responds in at least one phase when the overcurrent rises slowly, for example up to six to eight times the nominal current. This then presses with its web 72 the third angle piece 70 to the left, so that the second angle piece 62 again in the described clockwise direction moved and the contact is triggered.
  • FIG. 5 now shows the overall contactor composed of the parts of Figures 1 to 4.
  • the same reference numerals as in FIGS. 1 to 4 have been used for all parts.
  • FIG. 5 essentially illustrates the double action of the slider 48. This is designed so that, as described, it is effectively connected to the left end of the leg 55 of the angle piece 54, that it also moves the contact rail 33 when it is moved upward takes forcibly upwards, so forcibly opens the contact between the contact pieces 34 and 76.
  • the slide 48 is extended upwards so far that it can perform a second function, namely also strikes under the contact spring clip 44 and thus opens the coil contact with the contact pieces 46 and 47.
  • the action of the tension spring 35 causes the contact rail 33 to snap up into position 33a.
  • the device can be switched on again by pivoting the contra-angle 54 counterclockwise, specifically on the top of the upper housing part a correspondingly configured restart button or a plunger 88 with a plunger head 89 (FIGS. 6, 11 and 12) is provided, above all, to return the contact rail 33 from the spread position 33a back to the original position. At the same time, this also brings the contact spring clip 44 back into the switched-on position.
  • the housing part 87 for receiving the contactor part according to FIG. 4 can optionally be designed differently. So it can with the lower housing part 2 can be integrated or it can be divided according to the lower housing part 2 and the upper housing part 3 or it can be manufactured as a separate housing part in order to be firmly connected to the other housing parts after the installation of the individual device parts. Finally, there is a particularly advantageous possibility of expanding the housing part 87 upwards and accommodating all additional contacts both for the phases and for the coil connection. Compared to the previously described exemplary embodiment, this requires only a relatively small redesign according to FIG. 7, so that a component is created which can also be retrofitted to conventional contactors. It is important that intermediate wiring with contact connection screws is omitted.
  • the contactor explained above embodies a number of properties and advantages. One shift is possible by hand.
  • the contactor can also be switched on and off by remote control. Furthermore, overload protection of each individual phase is provided by both magnetic triggers and thermal triggers. The additional contacts per phase and in the coil connection are positively opened when tripped, so that a shutdown takes place in any case, even if the main contacts should be welded.
  • the switching status of the contactor is constantly visible from the outside.
  • the contactor can advantageously be used as a motor protection switch. Overall, despite all the possibilities, there is such a compact design that the contactor as a conventional Contactor can be attached to a standard mounting rail, for example, without requiring any significant space.
  • the mostly standardized width of the contactors (perpendicular to the image plane) can be maintained so that the contactor can be placed close together with other, possibly conventional contactors, in a control cabinet or on a mounting plate.
  • the lowest possible wiring is required, namely two three, ie six, wiring connections with contact connection screws for the three phases and two further wirings with connection screws for the coil connection. All connection screws are freely accessible from the operating side.
  • FIGS. 6 and 7 The exemplary embodiment of the contactor according to the invention shown in FIGS. 6 and 7 largely corresponds to the contactor according to FIGS. 1 to 5, so that the same reference numerals have been used for all the same parts.
  • Another design has received the fixed contact rail 81, which is also U-shaped, but with a vertical web in the drawing and two horizontal legs, the lower leg having a kink 83, which is used for pivoting a contact rail 82.
  • a compression spring 84 is inserted obliquely between the upper leg of the fixed contact rail 81 and the inner end of the contact rail 82 and can be held by pins or projections on both sides. In this case too, the contact rail in the open position assumes approximately the position shown with the reference symbol 82a.
  • the compression spring 84 is inserted between the fixed contact rail 81 and the pivotable contact rail 82 in such a way that it increases the contact pressure between the contact pieces 34 and 76 in the normal switched-on operating position, but increases after tripping via a Dead center position moved away and the opening force increased.
  • arc quenching chambers or lamellae 85 can advantageously also be arranged.
  • FIGS. 8 to 10 illustrate, in comparison to FIG. 4, another simplified exemplary embodiment of an actuating device in three different operating positions.
  • the same reference numerals as in FIG. 4 have been used for the same or equivalent parts.
  • magnetic triggers 49 and thermal triggers 73 are again present, one trigger per phase, that is, three triggers perpendicular to the image plane at a distance from one another, as has been explained above.
  • the actuating device also has an angle piece 54, the leg 55 of which engages with the left end in the drawing in a window of the slide 48 and which can be pivoted about a bearing 57.
  • a cranked lever 91 is provided, which is again held in the pivot bearing 64 and which, in the normal operating position according to FIG. 8, locks the angled part 59 of the angle piece 54 because the edge of the nose 60 rests on the adjacent edge of the step 65 .
  • the left end of the cranked lever 91 which is expediently crowned on the underside, engages in a window 90 of the armature 53 or a lower extension of the armature. If a magnetic trigger 49 now responds, the armature is attracted.
  • the cranked lever 91 pivots clockwise around the pivot bearing 64 and gives the angled part 59 of the Elbow 54 under the pressure of the spring 61 free, so that the slider 48, as described above, is suddenly moved up again and opens all the additional contacts described.
  • This operating position is shown in Figure 10.
  • the lower web 72 presses on a lug 94 of a pivot lever 93, which is held in a pivot bearing 71.
  • the nose 94 of the pivot lever bears against the web 72 and, in addition, the pivot lever 93 with the ball 68 bears against a rail loaded by the spring 92, which in turn is fastened in the cranked lever.
  • this rail 66 can also be designed as a compensation strip.
  • the pivot lever 93 pivots out in the corresponding direction, takes the rail 66 with it, as a result of which the cranked lever 91 is pivoted clockwise or in the direction of the arrow about the pivot bearing 64 is, so that the angle piece 54 comes back to the release position as described above and causes the contact opening of all additional contacts via the slide 48.
  • the above statements in connection with FIG. 4 also apply to this exemplary embodiment according to FIGS. 8 to 10.
  • FIGS. 11 and 12 illustrate a particularly important embodiment in the diagram, which is also shown in principle in FIG. 6 in order to clarify the connection with the other parts of the contactor. These are shown in FIG. 6 Device parts are also to be used equally in the exemplary embodiment according to FIGS. 1 to 5.
  • the slider 48 is designed as a flat, substantially rectangular plate which can be displaced between suitable guides, not shown, within the housing part 87 in the direction of the arrow 95.
  • a plunger 88 is fastened with a plunger button for manual actuation, which projects outwards through an opening in the upper housing wall and which makes the respective operating position visible. The inward position indicates the normal on position. If the plunger 88 protrudes far up, you can see the release position in which all additional contacts are open.
  • the slider 48 has three windows 96, 97 and 98 in the lower area, into which the legs 55 (FIG. 4) or 99, 100 and 101 of the angle pieces 54 or 102, 103 and 014 engage. Approximately in the middle area, further windows 105, 106 and 107 are incorporated in the slide 48, through which the pivotable contact rails 33 (FIG. 4) or 109, 110 and 111 are guided. The same applies to the contact rails 82 in the exemplary embodiment according to FIG. 6.
  • a further window 108 is provided in the slide 48, which, however, is only shown in FIG For the sake of clarity and for better differentiation, it is drawn in an upper right projection, but in practice it can be arranged within the rectangular plate of the slider 48 and further down.
  • the contact spring clip 44 is passed through this window 108.
  • the size of the window is to be adapted to the circumstances, so that the contact rails or the contact spring clip have a certain amount of play, but can inevitably be brought safely into the open position and when switched on again in the closed position.
  • a lock is provided between the slide 48 and a suitable head part 112 of a common contact bridge holder of the contactor contact system.
  • This head part 112 is shown only schematically in FIG. Figure 6 clearly shows, however, that this head part is a part which is connected to the plunger 16 and to the common contact bridge holder and thus to the armature 7 of the contactor.
  • the lock is now arranged and designed such that the additional contacts, which have been described in detail above, can only be switched on again if all main contacts 20, 21, 25, 28 of the contactor contact system are open.
  • the lock expediently has a cross slide 114.
  • the cross slide 114 is provided after the slide 48 with an inclined surface 118 which interacts with another window 119 of the slide 48.
  • the cross slide 114 has a somewhat offset projection 115, which can be snapped into a notch 113 or an indentation or recess in the head part 112.
  • the cross slide 114 as illustrated in FIG. 12, is provided with a compression spring 117, which is arranged such that it connects the cross slide 114 to the Tried to push slider 48.
  • the compression spring 117 is used, for example, in an elongated rectangular recess in the cross slide, the right end of the compression spring being supported on the wall of the recess and being held immovably there, for example by a pin or the like.
  • the left end of the compression spring is supported on a stop 121, which is connected to a guide 116, for example, in an embodiment not shown.
  • the cross slide 114 is advantageously held by a guide 116, which allows the cross slide to be displaced in its longitudinal direction and between stops, not shown, parallel to the displacement direction of the slide 48 and the head part 112.
  • FIGS. 11 and 12 The mode of operation of this constructional detail according to FIGS. 11 and 12 is essentially as follows, starting from the operating state shown in FIG. 12 and in which both all main contacts 20, 21 and all described additional contacts are open.
  • the plunger head 89 is actuated by pressing it down to switch the additional contacts on or on again.
  • the edge 120 on the upper edge of the window 119 reaches the inclined surface 118 of the cross slide 114, which is thereby displaced to the left against the pressure of the compression spring 117, so that the projection 115 engages in the notch 113.
  • the additional contacts for the three phases are switched on without load, since the main contacts of the Contactors are open.
  • the additional contact for the coil connection is closed, however, so that the contactor can now operate normally, ie can be switched on and off.
  • the actuating device moves into the locking position described, for example according to FIGS. 5 to 8. While the projection 115 of the cross slide 114 engages in the notch 113, when the slide 48 is pressed down, the outer edge of the inclined surface 118 bears against the left wall surface of the slide 48. If the contactor is now switched on, the plunger 16 with the head part 112 and with the common contact bridge holder moves down to the switch-on position, the latched cross slide being carried along on or with the guide 116 until the inclined surface 118 of the cross slide is in again the window 119 of the slide 48 can slide in, under the action of the compression spring 117. The projection 115 disengages, so that the contactor can now operate completely normally.
  • the cross slide 114 cannot be shifted to the left and its right end remains in the window 119 of the slide 48 and thus blocks the shifting movement of the slide 48 into the switched-on position. Only after the fault has been completely eliminated can it be switched on again if the main contacts of the contactor are open.
  • the main advantages of the contactor according to the invention are emphasized here.
  • the compactness of the contactor with all the functions described in a single device results in considerable connection savings and space savings for transport, storage and assembly in comparison with known contactors.
  • the contactor itself can operate completely normally, taking into account that a contactor has a switching capacity of up to approximately 10 million switching operations during the normal service life.
  • the described additional contacts switch only in the event of an overload and are therefore only loaded to a relatively small extent, so that there is also a high degree of switching reliability.
  • the additional contacts can only be switched on without load. This prevents bouncing.
  • the entire actuator, which is also called Switch lock can only be effective with its thermal and magnetic triggers if it is overshot.
  • a small switching cycle in the actuating device or the switching lock according to the invention is only a small switching cycle in the actuating device or the switching lock according to the invention.
  • the compact construction of the contactor with a contactor part according to FIG. 1 which is quite normal per se results in the further advantage that additional parts, such as auxiliary contact blocks or modules, can be attached or constructed.

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  • Contacts (AREA)
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  • Relay Circuits (AREA)
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  • Protection Of Generators And Motors (AREA)

Abstract

In a contactor (1) having a housing, in which a magnet system (6, 7, 13) is accommodated towards the mounting side and a contact system (19, 20, 21, 24, 25, 28, 81), which can be operated by the magnet system, is accommodated at a distance from the mounting side, thermal trip devices (73) and magnetic trip devices (49) being provided for each phase, which trip devices act on the contact system by means of an operating device (53, 54, 70, 48), in order to improve the switching reliability it is proposed that additional contacts (34, 76) for each phase and for the coil connection of the magnet system be provided in addition to the contact system and that the thermal trip devices, the magnetic trip devices and the operating devices be arranged and designed such that the additional contacts are forced to open in the event of tripping and switching-on again is possible only when the main contacts of the contact system are open. <IMAGE>

Description

Die Erfindung bezieht sich auf ein Schütz mit einem Gehäuse, in welchem nach der Montageseite zu ein Magnetsystem und mit Abstand von der Montageseite ein von dem Magnetsystem betätigbares, Hauptkontakte mit Zweifachkontaktunterbrechung aufweisendes Kontaktsystem untergebracht sind, wobei ebenfalls innerhalb des Gehäuses zu jeder Phase thermische Auslöser und magnetische Auslöser vorgesehen sind, welche mittels einer Betätigungsvorrichtung auf das Kontaktsystem einwirken und geht dabei von der EP-A-0 185 107 aus.The invention relates to a contactor with a housing, in which a magnetic system and at a distance from the mounting side a main system with main contacts with double contact interruption having contact system are housed, on the mounting side to a magnet system, thermal triggers and also within the housing for each phase Magnetic triggers are provided, which act on the contact system by means of an actuating device and are based on EP-A-0 185 107.

Es sind bereits verschiedene Konstruktionen bzw. Bauarten von Schützen und Motorschutzschaltern bekannt. Normalerweise besteht eine Motorschutzeinrichtung aus einem Schütz, dem ein separater thermischer Motorschutz zugeordnet ist, der in einem besonderen Gehäuse untergebracht ist. In einem einzigen Gehäuse ist dann sowohl das gesamte Kontaktsystem als auch das Magnetsystem, durch welche das Kontaktsystem betätigt wird, untergebracht, und zwar ist ds Magnetsystem entweder auf der Montageseite des Kontaktsystems oder auf der von der Montageseite abliegenden Seite des Kontaktsystems, d. h. oberhalb von diesem angeordnet. Der bewegliche Anker des Magnetsystems ist über eine Kupplung mit dem Kontaktbrückenhalter des Kontaktsystems verbunden. Bei einer weiteren Bauart ist in dem Gehäuse noch ein thermisches Motorschutzteil untergebracht, welches nur dann eine Auslösung bewirkt, wenn die Strombelastung bzw. thermische Belastung ein gewisses Maß überschreitet. Trotz des großen Bauaufwandes arbeitet dieser thermische Motorschutz in der Praxis verhältnismäßig träge, weil auch die Strombelastung bzw. die thermische Beanspruchung meist sehr langsam ansteigt. Um den betreffenden Elektromotor auch gegen plötzlich auftretende Störungen, z. B. Kurzschlüsse zu sichern, ist hierfür noch eine separate Sicherung erforderlich, die bisher in einem separaten Gehäuse außerhalb des vorerläuterten Schützengehäuses untergebracht ist. Um die notwendigen elektrischen Verbindungen herstellen zu können, bedarf es dazu insgesamt achtzehn Anschlüssen.Various designs and types of contactors and motor protection switches are already known. A motor protection device normally consists of a contactor, to which a separate thermal motor protection is assigned, which is housed in a special housing. The entire contact system and the magnet system by which the contact system is actuated are then accommodated in a single housing, specifically the magnet system is either on the mounting side of the contact system or on the side of the contact system remote from the mounting side, that is to say above it arranged. The movable armature of the magnet system is connected to the contact bridge holder of the contact system via a coupling. In a further design, a thermal motor protection part is also accommodated in the housing, which only triggers if the current load or thermal load exceeds a certain level. In spite of the large construction costs, this thermal motor protection works relatively sluggishly in practice, because the current load or the thermal stress usually also increases very slowly. To the electric motor in question also against sudden disturbances, e.g. B. To secure short circuits, a separate fuse is still required for this, which has so far been housed in a separate housing outside of the previously described shooter housing. In order to be able to make the necessary electrical connections, a total of eighteen connections are required.

Bekannt ist ferner, an ein normales Schütz, bestehend aus einem Kontaktsystem und einem Magnetsystem, über elektrische Leitungen einen separaten Motorschutzschalter anzuschließen. Hierfür sind insgesamt zwölf Anschlüsse erforderlich, an denen jeweils elektrische Leitungen angeschlossen werden müssen.It is also known to connect a separate motor protection switch to a normal contactor consisting of a contact system and a magnet system via electrical lines. This requires a total of twelve connections, to which electrical lines must be connected.

Bei beiden Bauarten ist die Verdrahtung umständlich und zeitaufwendig, und es wird nicht nur ein Materialaufwand für die elektrischen Leitungen, sondern auch für die vielen Anschlüsse an den Geräteteilen benötigt. Abgesehen von diesem Installationsaufwand wird auch bei diesen Mehrfachgeräten viel Raum, z. B. bei der Unterbringung in einem Schaltschrank benötigt.In both types, the wiring is cumbersome and time-consuming, and it is not only a cost of materials for the electrical lines, but also for the many connections to the device parts. Apart from this installation effort, there is also a lot of space in these multiple devices, e.g. B. needed for accommodation in a control cabinet.

Ein weiteres aus der EP-A-0 185 107 bekanntes Schütz ist auf Grund seiner Bauweise verhältnismäßig kompakt ausgebildet, benötigt also nur wenig Raum an einer Montagewand oder im Schaltschrank und di Verdrahtung kann weitgehend innerhalb des Schützes vorgenommen werden. Neben den thermischen Auslösern für drei Phasen sind auch Kurzschlußschnellauslöser oder magnetische Auslöser vorgesehen, die auf ein Schaltschloß und damit auf das Kontaktsystem einwirken und den Motorschutzschalter im gegebenen Fall ausschalten. Es kann hierbei auch noch ein Unterspannungsoder Arbeitsstromauslöser vorgesehen werden. Der wesentliche Nachteil dieses als Motorschutzschalter dienenden Schützes besteht jedoch darin, daß ein Einschalten nur von Hand mittels der Einschalttaste und auch ein gewolltes Ausschalten nur von Hand mittels einer Ausschalttaste vorgenommen werden kann, abgesehen von dem automatischen Ausschalten durch den beschriebenen Motorschutz.Another contactor known from EP-A-0 185 107 is of relatively compact design due to its construction, so it requires only little space on a mounting wall or in the control cabinet and the wiring can be carried out largely within the contactor. In addition to the thermal triggers for three phases, short-circuit fast triggers or magnetic triggers are also provided, which act on a switch lock and thus on the contact system and, in the given case, switch off the motor protection switch. An undervoltage or shunt release can also be provided. The main disadvantage of this contactor serving as a motor protection switch, however, is that it can only be switched on manually by means of the switch-on button and a deliberate switch-off can only be carried out manually by means of a switch-off button, apart from the automatic switch-off by the motor protection described.

In der Praxis besteht darüberhinaus noch ein erheblicher Bedarf für die Fälle, in denen das Schütz auch zusätzlich maschinell ein- oder ausgeschaltet werden soll. Außerdem besteht ein Bedarf dahingehend, daß das Ein- oder Ausschalten des Schützes von einer anderen geeigneten Stelle vorgenommen werden kann, z. B. bei Einbau des Schützes in einem Schaltschrank gemeinsam mit vielen anderen Schaltgeräten, wobei dann das Ein- oder Ausschalten maschinell oder von Hand von einer anderen Stelle, z. B. an einer Werkzeugmaschine, in der sich z. B. der zu schützende Elektromotor befindet, erfolgen soll.In practice, there is also a considerable need for cases in which the contactor should also be switched on or off mechanically. There is also a need for the contactor to be switched on or off from another suitable location, e.g. B. when installing the contactor in a control cabinet together with many other switching devices, then switching on or off mechanically or manually from another location, for. B. on a machine tool in which z. B. the electric motor to be protected is located.

Um ein möglichst kompaktes Schütz mit möglichst geringem äußeren Verdrahtungsaufwand zu schaffen, wurde in der EP-A-0 237 607 vorgeschlagen, in einem Gehäuse nahe der Montageseite ein Kontaktsystem und senkrecht darüber eine Betätigungsvorrichtung vorzusehen, wobei auf der einen Seite der Betätigungsvorrichtung zu jeder Phase thermische Auslöser und magnetische Auslöser angeordnet sind, die mit der Betätigungsvorrichtung wirkungsmäßig verbunden sind. Auf der anderen Seite der Betätigungsvorrichtung ist ein Elektromagnetantrieb angeordnet, dessen Anker über gelenkige Kniehebel mit einem Verlängerungsstück eines gemeinsamen Kontaktbrückenhalters des Kontaktsystems verbunden ist. Ferner ist ein Schieber vorgesehen, an welchem einerseits die Kniehebel und andererseits die thermischen und magnetischen Auslöser angreifen.In order to create a contactor that is as compact as possible with the least possible external wiring effort, it was proposed in EP-A-0 237 607 to provide a contact system in a housing near the mounting side and an actuating device vertically above it, with one side of the actuating device at each phase Thermal triggers and magnetic triggers are arranged, which are operatively connected to the actuator. On the other side of the actuating device, an electromagnetic drive is arranged, the armature of which is connected to an extension piece of a common contact bridge holder of the contact system via articulated toggle levers. A slide is also provided, on which the toggle levers on the one hand and the thermal and magnetic triggers on the other hand engage.

Schließlich ist noch aus der DE-C-845 974 ein Motorschutzschalter mit Schnellauslösung und Zweifachkontaktunterbrechung in den Phasen bekannt. Die Zweifachkontaktunterbrechung erfolgt an den Hauptkontakten bzw. den Arbeitskontakten. Zu diesem Zweck sind, wie bei Schützen und insbesondere auch bei Motorschutzschaltern allgemein bekannt, je Phase zwei feststehende Kontaktschienen mit Abstand voneinander vorgesehen, die mit einer beweglichen Kontaktbrücke zusammenwirken, so daß je Phase zwei Kontakte vorgesehen sind. Aber auch hier erfolgt die Schnellauslösung mittels magnetischer Auslöser, die unter Zwischenschaltung mechanischer Bauteile direkt auf die jeweilige Kontaktbrücke einwirken und durch Abheben der Kontaktbrücke den Doppelkontakt öffnen. In einem Störfall, in dem ein solcher magnetischer Auslöser zur Wirkung kommt, wird eine mechanische Vorrichtung mit zwei Schwingen in Tätigkeit gesetzt, so daß dann der Stromkreis der Spule des Elektromagneten unterbrochen wird, der Anker abfällt und auch die Kontaktbrücken in den übrigen Phasen geöffnet werden. Es ist ferner ein thermischer Auslöser vorgesehen, der ebenfalls über die mechanische Betätigungsvorrichtung im Störfalle den Motorschutzschalter abschalten kann.Finally, from DE-C-845 974 a motor protection switch with quick release and double contact break in the phases is known. The double contact interruption occurs at the main contacts or the work contacts. For this purpose, as is well known for contactors and in particular also for motor protection switches, two fixed contact rails are provided at a distance from each other for each phase, which cooperate with a movable contact bridge, so that two contacts are provided for each phase are. But also here the quick release takes place by means of magnetic triggers, which act directly on the respective contact bridge with the interposition of mechanical components and open the double contact by lifting off the contact bridge. In the event of a malfunction, in which such a magnetic release comes into effect, a mechanical device with two rockers is activated, so that the circuit of the coil of the electromagnet is interrupted, the armature drops and the contact bridges are opened in the other phases . A thermal release is also provided, which can also switch off the motor protection switch in the event of a fault via the mechanical actuation device.

Bei all den bekannten Bauarten bzw. Konstruktionen der Schütze wird davon ausgegangen bzw. es wird unterstellt, daß bei Überlast und Auslösung die Kontakte des Kontaktsystems auch tatsächlich immer öffnen. Bei den Schützen, die mit thermischen und magnetischen Auslösern ausgestattet sind, wirken diese mittels einer Betätigungsvorrichtung ausschließlich auf das übliche Kontaktsystem ein. Auf Grund der sehr großen Zahl von Schaltvorgängen, die das Kontaktsystem ausführen muß, kommt es im Laufe der Zeit zu einem Verschleiß, der durch zahlreiche mechanische Einflüsse und auch durch auftretende Lichtbögen gefördert bzw. beschleunigt wird. Es kann daher zu unvorhersehbaren Zeitpunkten zum Verschweißen der Kontakte kommen, so daß letztlich keine optimale Schaltsicherheit gegeben ist.In all the known types or constructions of the contactors, it is assumed or assumed that the contacts of the contact system actually always open in the event of overload and tripping. In the case of contactors equipped with thermal and magnetic triggers, these only act on the usual contact system using an actuating device. Due to the very large number of switching operations that the contact system has to carry out, wear occurs over time, which is promoted or accelerated by numerous mechanical influences and also by arcing. The contacts can therefore be welded at unpredictable times, so that ultimately there is no optimal switching reliability.

Der Erfindung liegt demgegenüber die Aufgabe zu Grunde, ein kompaktes Schütz mit geringem äußeren Verdrahtungsaufwand mit integrierten thermischen und magnetischen Auslösern zu schaffen, welches eine große Schaltsicherheit gewährleistet.In contrast, the invention is based on the object of creating a compact contactor with little external wiring with integrated thermal and magnetic triggers, which ensures great switching reliability.

Ausgehend von dem zu Anfang erläuterten Schütz wird die gestellte Aufgabe dadurch gelöst, daß im Strompfad der Hauptkontakte des Kontaktsystems zusätzliche während des normalen Schaltbetriebes ständig geschlossene Kontakte für jede Phase und für den Spulenanschluß des Magnetsystems vorgesehen sind, und daß die thermischen Auslöser, die magnetischen Auslöser und die Betätigungsvorrichtung derart angeordnet und ausgebildet sind, daß sämtliche zusätzlichen Kontakte bei Auslösung infolge eines Störfalles zwangsweise geöffnet werden.Starting from the contactor explained at the beginning, the task is solved in that in the current path Main contacts of the contact system additional contacts which are constantly closed during normal switching operation are provided for each phase and for the coil connection of the magnet system, and that the thermal triggers, the magnetic triggers and the actuating device are arranged and designed in such a way that all additional contacts when triggered as a result of an accident forcibly opened.

Dadurch, daß die zusätzlichen Kontakte während des normalen Schaltbetriebes des Schützes ständig geschlossen bleiben können, unterliegen sie daher praktisch keinem Verschleiß, so daß aus diesem Grunde keine Gefahr für ein Verschweißen dieser zusätzlichen Kontakte gegeben ist. Selbst diese Gefahr wird dadurch beseitigt, daß die zusätzlichen Kontakte im Falle der Überlast zwangsweise geöffnet werden.Because the additional contacts can remain closed during the normal switching operation of the contactor, they are therefore subject to virtually no wear, so that there is no danger of these additional contacts being welded for this reason. Even this danger is eliminated in that the additional contacts are forcibly opened in the event of an overload.

Vorteilhafte Ausgestaltungen des erfindungsgemäßen Schützes ergeben sich aus den Unteransprüchen.Advantageous embodiments of the contactor according to the invention result from the subclaims.

In der Zeichnung sind Ausführungsbeispiele der Erfindung im Schema dargestellt, und zwar zeigen.

  • Figur 1 ein Schützteil mit Magnetsystem und Kontaktsystem im Vertikalschnitt,
  • Figur 2 ein Schützteil gemäß Figur 1, jedoch mit einer Ergänzung des oberen Gehäuseteiles,
  • Figur 3 das obere Gehäuseteil im Vertikalschnitt mit Darstellung der Spulenanschlüsse,
  • Figur 4 ein weiteres Schützteil mit Darstellung der thermischen und magnetischen Auslöser sowie mit einem zusätzlichen Kontakt im Vertikalschnitt,
  • Figur 5 einen Vertikalschnitt durch ein gesamtes Schütz, welches aus den Teilen nach den Figuren 1 bis 4 zusammengesetzt ist,
  • Figur 6 einen Vertikalschnitt eines Schützes entsprechend Figur 5, jedoch in einer anderen Ausführung
  • Figur 7 ein Schützenteil entsprechend Figur 4, jedoch in der Ausführung nach Figur 6,
  • Figuren 8 bis 10 eine andere Ausgestaltung der Betätigungsvorrichtung mit thermischen und magnetischen Auslösern in unterschiedlichen Betriebsstellungen,
  • Figur 11 eine perspektivische Darstellung eines Schiebers mit einer Sperre und
  • Figur 12 eine Einzelheit aus Figur 6 mit einer Sperre in vergrößertem Maßstab.
In the drawing, embodiments of the invention are shown in the diagram, namely show.
  • 1 shows a contactor part with magnet system and contact system in vertical section,
  • FIG. 2 shows a protective part according to FIG. 1, but with an addition to the upper housing part,
  • FIG. 3 the upper housing part in vertical section showing the coil connections,
  • FIG. 4 shows a further protective part with a representation of the thermal and magnetic triggers and with an additional contact in vertical section,
  • FIG. 5 shows a vertical section through an entire contactor, which is composed of the parts according to FIGS. 1 to 4,
  • Figure 6 is a vertical section of a contactor corresponding to Figure 5, but in a different version
  • 7 shows a contactor part corresponding to FIG. 4, but in the embodiment according to FIG. 6,
  • FIGS. 8 to 10 show another embodiment of the actuating device with thermal and magnetic triggers in different operating positions,
  • Figure 11 is a perspective view of a slide with a lock and
  • Figure 12 shows a detail of Figure 6 with a lock on an enlarged scale.

Der besseren Deutlichkeit halber sind in den Figuren 1 bis 4 Einzelteile des erfindungsgemäßen Schützes herausgezeichnet, während die Figur 5 einen Längsschnitt durch das gesamte, aus den Einzelteilen nach den Figuren 1 bis 4 zusammengesetzte Schütz veranschaulicht. Das eigentliche Schütz 1 nach Figur 1 weist ein Gehäuseunterteil 2 und ein Gehäuseoberteil 3 auf mit einer Teilungsebene 4, welche senkrecht zur Bildebene der Figur 1 verläuft. Die Gehäuseteile können durch übliche Verschraubung miteinander verbunden sein. Vorteilhaft ist es jedoch, klammerartige Verbingunsfedern 10 mit einer Kröpfung 11 am unteren Ende und einem Haltbogen 12 am oberen Ende einzustzen, so daß ein einfaches werkzeugloses Zusammenspannen der Gehäuseteile ermöglicht ist, so daß sowohl eine einfache Montage als auch Demontage erreicht wird. Das Gehäuseunterteil 2 weist auf der Befestigungsseite eine untere Befestigungsplatte auf, die mit einem im einzelnen nicht gezeichneten Schnellverschluß versehen ist und zum Verbinden mit einer Norm-Tragschiene dient. Das Magnetsystem besteht aus einem Kern 6 mit Kurzschlußringen 8 und 9, der im Gehäuseunterteil 2 befestigt ist, sowie aus einem im Gehäuseoberteil 3 beweglichen Anker 7 und einer Spule 13. Der Anker 7 ist an einem Verbindungsstück 14 befestigt, von dem seitliche Führungslaschen 15 ausgehen, die den Anker seitlich umfassen. Mit dem Verbindungsstück 14 ist ein Stößel 16 verbunden, der nach oben hin zu einem Kontaktbrückenhalter erweitert ist und mit einer Drucktaste 17 endet, die durch eine Öffnung des Gehäuseoberteiles nach außen herausragt und an deren Höhenstellung der Schaltzustand des Schützes erkennbar ist.For the sake of clarity, individual parts of the contactor according to the invention are drawn out in FIGS. 1 to 4, while FIG. 5 illustrates a longitudinal section through the entire contactor composed of the individual parts according to FIGS. 1 to 4. The actual contactor 1 according to FIG. 1 has a lower housing part 2 and an upper housing part 3 with a division plane 4 which runs perpendicular to the image plane of FIG. 1. The housing parts can be connected to one another by conventional screwing. However, it is advantageous to use clamp-like connecting springs 10 with a crank 11 at the lower end and a support bow 12 at the upper end, so that a simple tool-free clamping of the housing parts is made possible, so that both simple assembly and disassembly is achieved. The lower housing part 2 has a lower fastening plate on the fastening side, which is provided with a quick fastener (not shown in detail) and is used for connection to a standard mounting rail. The magnet system consists of a core 6 with short-circuit rings 8 and 9, which is fastened in the lower housing part 2, and an armature 7 and a coil 13 movable in the upper housing part 3. The armature 7 is fastened to a connecting piece 14, from which lateral guide tabs 15 extend that enclose the anchor laterally. With the connecting piece 14, a plunger 16 is connected, which is extended upwards to a contact bridge holder and ends with a pushbutton 17 which protrudes outwards through an opening in the upper housing part and the height of which indicates the switching status of the contactor.

Im Kontaktbrückenhalter des Stößels 16 befindet sich ein Fenster 18, in dem eine Kontaktbrücke 19 mit beweglichen Kontaktstücken 20, 21 höhenbeweglich angeordnet ist. Die Kontaktbrücke 19 steht unter dem Druck einer schraubenförmigen Druckfeder 22 unter Zwischenschaltung einer weiteren Bügelfeder 23, die zur besseren Halterung und Führung dient. Zu der Kontaktbrücke sind Festkontaktschienen 24 mit Festkontaktstücken angeordnet, von denen in Figur 1 nur eine Schiene gezeichnet ist. Diese führt zu einer Klemme 26, welche ihrerseits eine Kontaktanschlußschraube 27 trägt. Die Klemme 26 dient zum Anschluß der nicht gezeichneten Außenverdrahtung.In the contact bridge holder of the plunger 16 there is a window 18 in which a contact bridge 19 with movable contact pieces 20, 21 is arranged so as to be vertically movable. The contact bridge 19 is under the pressure of a helical compression spring 22 with the interposition of a further bow spring 23, which serves for better mounting and guidance. Fixed contact rails 24 with fixed contact pieces are arranged to the contact bridge, of which only one rail is shown in FIG. 1. This leads to a terminal 26, which in turn carries a contact terminal screw 27. The terminal 26 is used to connect the external wiring, not shown.

Figur 2 zeigt einige Ergänzungen im Vergleich zu Figur 1. Was den Schützenteil nach Figur 1 angetrifft, so stimmt er mit der Figur 2 überein und es sind für die gleichen Teile die gleichen Bezugszeichen verwendet worden. Zunächst zeigt Figur 2 eine weitere U-förmige Festkontaktschiene 29 mit einem Festkontaktstück 28 auf der Oberseite des Steges 30 der Festkontaktschiene 29. An dem unteren Ende des Schenkels 31 ist das eine Ende einer Zugfeder 35 befestigt, während das andere Ende der Zugfeder an einer schwenkbaren Kontaktschiene 33 angreift. Das Schwenklager der Kontaktschiene 33 befindet sich auf der Außenseite des unteren Endes des Schenkels 32, jedoch mit einem gewissen kleinen Abstand oberhalb der Mittellinie bzw. Zuglinie der Zugfeder 35. In der ausgezogen gezeichneten Stellung wird die Kontaktschiene 33 mit dem beweglichen Kontaktstück 34 durch die Zugfeder 35 nach unten gedrückt. Sobald eine zwangsweise Öffnung des Kontaktes mit dem Kontaktstück 34 erfolgt, was nachfolgend noch im einzelnen beschrieben wird, wird die Kontaktschiene entgegen dem Uhrzeigersinn um das Schwenklager bewegt, so daß die Zugfeder sich über den entsprechenden Totpunkt mitbewegt und sodann zum schlagartigen Öffnen des Kontaktes beiträgt, bis sich die Kontaktschiene in der strichpunktierten Lage 33a befindet.Figure 2 shows some additions compared to Figure 1. As for the shooter part of Figure 1, it agrees with Figure 2 and the same reference numerals have been used for the same parts. 2 shows a further U-shaped fixed contact rail 29 with a fixed contact piece 28 on the upper side of the web 30 of the fixed contact rail 29. One end of a tension spring 35 is fastened to the lower end of the leg 31, while the other end of the tension spring is fastened to a pivotable one Contact rail 33 attacks. The pivot bearing of the contact rail 33 is located on the outside of the lower end of the leg 32, but with a certain small distance above the center line or pull line of the tension spring 35. In the drawn position, the contact rail 33 with the movable contact piece 34 is by the tension spring 35 pressed down. As soon as the contact with the contact piece 34 is forcibly opened, which will be described in more detail below, the contact rail is moved counterclockwise around the pivot bearing, so that the tension spring also moves over the corresponding dead center and then contributes to the sudden opening of the contact, until the contact rail is in the dot-dash position 33a.

Es sei an dieser Stelle noch eine allgemeine Erläuterung eingefügt. In den Figuren sind die elektrischen Teile nur für eine Phase zeichnerisch dargestellt. Normalerweise arbeitet ein Schütz mit drei Phasen, so daß in der Praxis senkrecht zur Bildebene drei Kontaktbrücken 19 mit den jeweiligen Druckfedern in einzelnen Fenstern des gemeinsamten Kontaktbrückenhalters des Stößels untergebracht sind. Entsprechend sind auch drei Festkontaktschienen 24 und 29 mit separaten Klemmen nebeneinander angeordnet. Dies gilt auch für die Kontaktschienen 33 mit den beweglichen Kontaktstücken 34 und für die Zufedern 35.A general explanation should be added at this point. In the figures, the electrical parts are only shown for one phase. Normally a contactor works with three phases, so that in practice it is perpendicular to Three contact bridges 19 with the respective compression springs are accommodated in individual windows of the common contact bridge holder of the plunger. Accordingly, three fixed contact rails 24 and 29 with separate terminals are arranged side by side. This also applies to the contact rails 33 with the movable contact pieces 34 and for the springs 35.

Figur 3 zeigt einen Vertikalschnitt durch das Gehäuseoberteil 3, jedoch verglichen mit den Figuren 1 und 2 nicht in einer Ebene einer Phase, sondern in einer Ebene, in der sich die Spulenanschlüsse befinden. Die Spulenanschlüsse befinden sich natürlich nur in einer Ebene, da nur zwei Anschlüsse erforderlich sind. Es sind zwei Spulenanschlußklemmen 36 und 38 mit Spulenanschlußschrauben 37 und 39 feststehend in dem Gehäuseoberteil 3 angeordnet. Die Spulenanschlußschrauben 37 und 39 sind von oben her durch Bohrungen für einen Schraubendreher zugänglich, wobei die Bohrungen gleichzeitig als Führungen für den Schraubendreher dienen. Ferner sind Spulenanschlußschienen 40 und 41 mit vertikalen Schenkeln 42 und 43 vorgesehen, wobei die letzteren mit der Spule in Verbindung stehen. Zweckmäßigerweise sind die Spulenanschlußdrähte nicht direkt mit den Schenkeln 42 und 43 verbunden, sondern es sind vorteilhafterweise beiderseitige nicht gezeichnete Federstücke vorhanden, die beim Aufsetzen des Gehäuseoberteiles 3 auf das Gehäuseunterteil 2 aufeinandertreffen und einen sicheren Stromübergang gewährleisten und gleichzeitig Montage und Demontage erleichtern. Von besonderer Bedeutung ist nun, daß in dem Strompfad der Spulenanschlüsse ein zusätzlicher zwangsweise zu öffnender Kontakt vorgesehen ist. Dieser zusätzliche Kontakt wird von einem Festkontaktstück 46 und einem beweglichen Kontaktstück 47 gebildet. Das Festkontaktstück 46 ist auf der Oberseite eines rechtwinklig abgebogenen Schenkels der Spulenanschlußschiene 41 befestigt, während das bewegliche Kontaktstück 47 am äußeren Ende eines Kontaktfederbügels 44 angebracht ist. Der Kontaktferderbügel ist mit seinem rechten Ende an einer rechtwinklig umgebogenen Schiene 45 befestigt, die ihrerseits mit der Spulenanschlußklemme 38 elektrisch leitend verbunden ist. Der in Figur 3 teilweise dargestellte Schrieber 48, der nachfolgend noch im einzelnen beschrieben wird, dient zu einer zwangsweisen Öffnung des Kontaktes 46, 47, so daß der Kontaktfederbügel in Öffnungsstellung die strichpunktierte Lage 44a einnimmt und der Spulenanschluß mit Sicherheit unterbrochen wird.FIG. 3 shows a vertical section through the upper housing part 3, but compared to FIGS. 1 and 2 not in one plane of a phase, but in a plane in which the coil connections are located. The coil connections are of course only on one level, since only two connections are required. There are two coil connection terminals 36 and 38 with coil connection screws 37 and 39 fixed in the upper housing part 3. The coil connection screws 37 and 39 are accessible from above through holes for a screwdriver, the holes also serving as guides for the screwdriver. Furthermore, coil connecting rails 40 and 41 with vertical legs 42 and 43 are provided, the latter being connected to the coil. Advantageously, the coil connecting wires are not directly connected to the legs 42 and 43, but there are advantageously mutually not shown spring pieces that meet when the upper housing part 3 is placed on the lower housing part 2 and ensure a safe current transfer and at the same time facilitate assembly and disassembly. It is of particular importance that In the current path of the coil connections, an additional contact that is forcibly opened is provided. This additional contact is formed by a fixed contact piece 46 and a movable contact piece 47. The fixed contact piece 46 is attached to the top of a right-angled leg of the coil connecting rail 41, while the movable contact piece 47 is attached to the outer end of a contact spring clip 44. The contact end bracket is attached with its right end to a right-angled rail 45, which in turn is electrically conductively connected to the coil terminal 38. The slide 48 partially shown in FIG. 3, which will be described in detail below, serves to force the contact 46, 47 to open, so that the contact spring clip assumes the dash-dot position 44a in the open position and the coil connection is interrupted with certainty.

Ein weiteres besonders wichtiges Bauteil des erfindungsgemäßen Schützes ist in der Figur 4 dargestellt. Mit dem Bezugszeichen 49 ist ein magnetischer Auslöser bezeichnet, der im wesentlichen aus einem Spulenträger 50, einer Spule 51 und einem Befestigungsteil 52 besteht. In bezug auf die Spule ist ein Anker 53 axial verschiebbar angeordnet, der am unteren Ende ein Fenster aufweist und,wie nachfolgend beschrieben, mit einer Betätigungsvorrichtung zusammenwirkt. Die Betätigungsvorrichtung weist ein erstes Winkelstück 54 auf mit einem linken Schenkel 55. Ferner besitzt das Winkelstück einen Steg 58. Das Schwenklager für das Winkelstück ist mit dem Bezugszeichen 57 versehen. An seinem äußeren, unteren Ende besitzt der Steg 58 ein abgewinkeltes Teil 59 mit einer Nase 60. Ferner greift an dem Steg 58 eine Druckfeder 61 an, die mit ihrem anderen Ende an der Innenwand des Gehäuses 87 abgestützt ist und die versucht, das Winkelstück 54 in dem Lager 57 im Uhrzeigersinne zu schwenken. Unterhalb des ersten Winkelstücks 54 befindet sich ein zweites Winkelstück 62, dessen einer Schenkel 63 in das Fenster 90 des Ankers 53 eingreift. Das Winkelstück 62 ist in einem Schwenklager 64 gehalten und es besitzt eine Stufe 65. An dem Winkelstück 62 ist ferner eine Kompensationsstreifen 66 angebracht, dessen unteres freies Ende an einem balligen Vorsprung 68 eines Hebelarms 67 anliegt und zur Kompensation in bezug auf die Raumtemperatur dient. Der Kompensationsstreifen 66 und der hebelarm 67 sind nur einfach vorhanden, während alle übrigen bisher zur Figur 4 erläuterten und auch hierzu noch nachfolgend erläuterten Teil je dreifach vorgesehen sind, wie weiter unten noch dargelegt wird. Der Hebelarm 67 ist bei 69 an einem dritten Winkelstück 70 befestigt. Dieses Winkelstück 70 ist bei 71 mit dem oberen Winkelstück 62 verbunden. Der nach außen abgewinkelte Schenkel des Winkelstücks 70 weist eine Öffnung bzw. einen Schlitz auf, in den von oben ein Steg 72 eines thermischen Auslösers 73 eingreift. Der thermische Auslöser ist an seinem oberen Ende durch eine Halterung 74 befestigt. Im oberen Teil des Bauteils nach Figur 4 ist noch ein Festkontaktstück 76 einer Festkontaktschiene 77 dargestellt. Diese Festkontaktschiene 77 ist im wesentlichen C-förmig gestaltet und ihr Schenkel 78 führt zu einer Klemme 79 mit Kontaktanschlußschraube 80. Das Festkontaktstück 76 wirkt mit dem bereits beschriebenen beweglichen Kontaktstück 34 der Kontaktschiene 33 zusammen. Es ist dies also ein zusätzlicher Kontakt für je eine Phase, insgesamt also drei zusätzliche Kontakte. Wie oben schon angedeutet wurde, sind für jede Phase je ein magnetischer Auslöser 49 und je ein thermischer Auslöser 73 vorhanden. Auch alle übrigen zur Figur 4 beschriebenen Teile sind je dreifach, also einfach für jede Phase, vorhanden, und zwar senkrecht zur Bildebene mit Abstand voneinander. Es sei hier schließlich noch erwähnt, daß die erläuterten Befestigungen an den Punkten 69 und 71 und deren Abstand voneinander dem Phasenausgleichschutz dienen.Another particularly important component of the contactor according to the invention is shown in FIG. Reference numeral 49 denotes a magnetic release, which essentially consists of a coil carrier 50, a coil 51 and a fastening part 52. With respect to the coil, an armature 53 is arranged axially displaceably, which has a window at the lower end and, as described below, interacts with an actuating device. The actuating device has a first angle piece 54 with a left leg 55. Furthermore, the angle piece has a web 58. The pivot bearing for the angle piece is provided with the reference number 57. At its outer, lower end the web 58 has an angled part 59 with a lug 60. Furthermore, a pressure spring 61 engages on the web 58, the other end of which is supported on the inner wall of the housing 87 and which tries to turn the angle piece 54 in the bearing 57 in a clockwise direction to pan. Below the first angle piece 54 there is a second angle piece 62, one leg 63 of which engages in the window 90 of the armature 53. The angle piece 62 is held in a pivot bearing 64 and it has a step 65. A compensation strip 66 is also attached to the angle piece 62, the lower free end of which rests on a spherical projection 68 of a lever arm 67 and serves for compensation with respect to the room temperature. The compensation strip 66 and the lever arm 67 are provided only once, while all the other parts which have been explained so far with reference to FIG. 4 and also explained below in this regard are provided in triplicate, as will be explained further below. The lever arm 67 is attached to a third angle piece 70 at 69. This angle piece 70 is connected at 71 to the upper angle piece 62. The outwardly angled leg of the angle piece 70 has an opening or a slot into which a web 72 of a thermal release 73 engages from above. The thermal trigger is attached to its upper end by a bracket 74. In the upper part of the component according to FIG. 4, a fixed contact piece 76 of a fixed contact rail 77 is also shown. This fixed contact rail 77 is essentially C-shaped and its leg 78 leads to a clamp 79 with a contact connection screw 80. The fixed contact piece 76 interacts with the movable contact piece 34 of the contact rail 33 already described. So this is an additional one Contact for one phase each, for a total of three additional contacts. As has already been indicated above, there is a magnetic release 49 and a thermal release 73 for each phase. All the other parts described for FIG. 4 are also provided in triplicate, that is to say simply for each phase, and perpendicular to the image plane at a distance from one another. Finally, it should be mentioned here that the fastenings explained at points 69 and 71 and their spacing from one another serve to protect the phase balance.

Die Wirkungsweise der Einrichtung nach Figur 4 ist im wesentlichen folgende. Bei plötzlichem Auftreten eines Überstroms, z.B. ab dem Zehnfachen des Nennstroms bis zum Kurzschluß, tritt der in der betreffenden Phase liegende magnetische Auslöser 49 in Tätigkeit, das heißt der Anker 53 wird schlagartig angezogen, damit der Schenkel 63 des zweiten Winkelstücks 62 um das Schwenklager 64 im Uhrzeigersinne mitbewegt und die Nase 60 gegenüber der Stufe 65 frei, so daß die Druckfeder 61 das erste Winkelstück 54 um das Lager 57 ebenfalls im uhrzeigersinne ausschwenkt. Das linke Ende des Schenkels 55 des Winkelstücks 54 greift in den Schieber 48 ein, so daß dieser nach oben hin verschoben wird und eine weiter unten noch näher erläuterte Doppelfunktion auslöst. Ein ähnlicher Vorgang vollzieht sich, wenn bei langsamem Ansteigen des Überstroms, beispielsweise bis zum Sechs- bis Achtfachen des Nennstroms, ein thermischer Auslöser 73 in mindestens einer Phase anspricht. Dieser drückt dann mit seinem Steg 72 das dritte Winkelstück 70 nach links, so daß sich das zweite Winkelstück 62 wieder im beschriebenen Uhrzeigersinn bewegt und die Kontaktauslösung erfolgt.The mode of operation of the device according to FIG. 4 is essentially as follows. If an overcurrent suddenly occurs, for example from ten times the nominal current to a short circuit, the magnetic release 49 in the relevant phase comes into operation, that is to say the armature 53 is suddenly pulled up, so that the leg 63 of the second angle piece 62 about the pivot bearing 64 moves in the clockwise direction and the nose 60 is free relative to the step 65, so that the compression spring 61 also swings the first angle piece 54 around the bearing 57 in a clockwise direction. The left end of the leg 55 of the angle piece 54 engages in the slide 48, so that it is moved upward and triggers a double function, which will be explained in more detail below. A similar process takes place when a thermal release 73 responds in at least one phase when the overcurrent rises slowly, for example up to six to eight times the nominal current. This then presses with its web 72 the third angle piece 70 to the left, so that the second angle piece 62 again in the described clockwise direction moved and the contact is triggered.

Figur 5 zeigt nun das aus den Teilen der Figuren 1 bis 4 zusammengesetzte Gesamtschütz. Für alle Teile sind die gleichen Bezugszeichen wie in den Figuren 1 bis 4 verwendet worden. Figur 5 veranschaulicht aber im wesentlichen die Doppelwirkung des Schiebers 48. Dieser ist so ausgebildet, daß er einmal, wie beschrieben, mit dem linken Ende des Schenkels 55 des Winkelstücks 54 wirksam in Verbindung steht, daß er ferner beim Verschieben nach oben hin die Kontaktschiene 33 zwangsweise nach oben hin mitnimmt, also den Kontakt zwischen den Kontaktstücken 34 und 76 zwangsweise öffnet.Figure 5 now shows the overall contactor composed of the parts of Figures 1 to 4. The same reference numerals as in FIGS. 1 to 4 have been used for all parts. However, FIG. 5 essentially illustrates the double action of the slider 48. This is designed so that, as described, it is effectively connected to the left end of the leg 55 of the angle piece 54, that it also moves the contact rail 33 when it is moved upward takes forcibly upwards, so forcibly opens the contact between the contact pieces 34 and 76.

Schließlich ist der Schieber 48 nach oben hin so weit verlängert, daß er eine zweite Funktion ausführen kann, nämlich auch unter den Kontaktfederbügel 44 schlägt und damit den Spulenkontakt mit den Kontaktstücken 46 und 47 öffnet. Durch Wirkung der Zugfeder 35 schnellt die Kontaktschiene 33 in die Lage 33a nach oben. Nach Behebung der Störung kann das Wiedereinschalten durch Rückschwenken des Winkelstücks 54 im Gegenuhrzeigersinn erfolgen, und zwar ist an der Oberseite des Gehäuseoberteils eine entsprechend gestaltete Wiedereinschalttaste bzw. ein Stößel 88 mit Stößelkopf 89 (Figur 6, 11 und 12) vorgesehen, dies vor allem, um die Kontaktschiene 33 aus der gespreizten Stellung 33a wieder in die Ursprungslage zurückzubringen. Gleichzeitig wird hierdurch auch der Kontaktfederbügel 44 wieder in die Einschaltstellung gebracht.Finally, the slide 48 is extended upwards so far that it can perform a second function, namely also strikes under the contact spring clip 44 and thus opens the coil contact with the contact pieces 46 and 47. The action of the tension spring 35 causes the contact rail 33 to snap up into position 33a. After the malfunction has been remedied, the device can be switched on again by pivoting the contra-angle 54 counterclockwise, specifically on the top of the upper housing part a correspondingly configured restart button or a plunger 88 with a plunger head 89 (FIGS. 6, 11 and 12) is provided, above all, to return the contact rail 33 from the spread position 33a back to the original position. At the same time, this also brings the contact spring clip 44 back into the switched-on position.

Das Gehäuseteil 87 für die Aufnahme des Schützenteils gemäß Figur 4 kann wahlweise unterschiedlich gestaltet sein. So kann es mit dem Gehäuseunterteil 2 integriert sein oder es kann eine Aufteilung entsprechend dem Gehäuseunterteil 2 und dem Gehäuseoberteil 3 erhalten oder es kann als separates Gehäuseteil gefertigt werden, um nach dem Einbau der einzelnen Vorrichtungsteile mit den übrigen Gehäuseteilen fest verbunden zu werden. Schließlich besteht eine besonders vorteilhaft Möglichkeit darin, das Gehäuseteil 87 nach oben hin zu erweitern und darin sämtliche zusätzlichen Kontakte sowohl für die Phasen als auch für den Spulenanschluß unterzubringen. Gegemüber dem vorerläuterten Ausführungsbeispiel bedarf es dazu nur einer verhältnismäßig geringen Umkonstruktion gemäß Figur 7, so daß ein Bauteil geschaffen wird, welches auch nachträglich an herkömmliche Schütze angeschlossen werden kann. Wichtig ist dabei, daß Zwischenverdrahtungen mit Kontaktanschlußschrauben wegfallen.The housing part 87 for receiving the contactor part according to FIG. 4 can optionally be designed differently. So it can with the lower housing part 2 can be integrated or it can be divided according to the lower housing part 2 and the upper housing part 3 or it can be manufactured as a separate housing part in order to be firmly connected to the other housing parts after the installation of the individual device parts. Finally, there is a particularly advantageous possibility of expanding the housing part 87 upwards and accommodating all additional contacts both for the phases and for the coil connection. Compared to the previously described exemplary embodiment, this requires only a relatively small redesign according to FIG. 7, so that a component is created which can also be retrofitted to conventional contactors. It is important that intermediate wiring with contact connection screws is omitted.

Das oben erläuterte Schütz verkörpert in sich eine Reihe von Eigenschaften und Vorteilen. Einmal ist eine Schaltung von Hand möglich. Des weiteren kann das Schütz durch Fernbedienung ein- und ausgeschaltet werden. Ferner ist ein Überlastschutz jeder einzelnen Phase sowohl durch magnetische Auslöser als auch durch thermische Auslöser gegeben. Die zusätzlichen Kontakte je Phase und im Spulenanschluß werden bei Auslösung zwangsgeöffnet, so daß in jedem Falle eine Abschaltung erfolgt, selbst wenn die Hauptkontakte verschweißt sein sollten. Der Schaltzustand des Schützes ist ständig von außen sichtbar. Das Schütz läßt sich vorteilhafterweise als Motorschutzschalter verwenden. Insgesamt ergibt sich trotz aller gegebenen Möglichkeiten eine solche kompakte Bauart, daß das Schütz wie ein herkömmliches Schütz beispielsweise auf einer Norm-Tragschiene befestigt werden kann, ohne daß ein nennenswerter größerer Raumbedarf entsteht. Dabei kann die meist genormte Breite der Schütze (senkrecht zur Bildebene) eingehalten werden, so daß das Schütz dicht an dicht mit anderen, ggfs. üblichen Schützen, in einem Schaltschrank oder auf einer Montageplatte untergebracht werden kann. Schließlich ist nur die geringstmögliche Verdrahtung erforderlich, nämlich zweimal drei, also sechs, Verdrahtungsanschlüsse mit Kontaktanschlußschrauben für die drei Phasen und zwei weitere Verdrahtungen mit Anschlußschrauben für den Spulenanschluß. Dabei sind sämtliche Anschlußschrauben von der Bedienungsseite frei zugänglich.The contactor explained above embodies a number of properties and advantages. One shift is possible by hand. The contactor can also be switched on and off by remote control. Furthermore, overload protection of each individual phase is provided by both magnetic triggers and thermal triggers. The additional contacts per phase and in the coil connection are positively opened when tripped, so that a shutdown takes place in any case, even if the main contacts should be welded. The switching status of the contactor is constantly visible from the outside. The contactor can advantageously be used as a motor protection switch. Overall, despite all the possibilities, there is such a compact design that the contactor as a conventional Contactor can be attached to a standard mounting rail, for example, without requiring any significant space. The mostly standardized width of the contactors (perpendicular to the image plane) can be maintained so that the contactor can be placed close together with other, possibly conventional contactors, in a control cabinet or on a mounting plate. Finally, only the lowest possible wiring is required, namely two three, ie six, wiring connections with contact connection screws for the three phases and two further wirings with connection screws for the coil connection. All connection screws are freely accessible from the operating side.

Das in den Figuren 6 und 7 dargestellte Ausführungsbeispiel des erfindungsgemäßen Schützes stimmt zu einem großen Teil mit dem Schütz nach den Figuren 1 bis 5 überein, so daß für alle gleichen Teile die gleichen Bezugszeichen verwendet worden sind. Eine andere Gestaltung hat hier die Festkontaktschiene 81 erhalten, die zwar ebenfalls U-förmig ausgebildet ist, jedoch mit einem in der Zeichnung vertikalen Steg und zwei waagerechten Schenkeln, wobei der untere Schenkel einen Knick 83 aufweist, der zur Schwenklagerung einer Kontaktschiene 82 dient. Zwischen dem oberen Schenkel der Festkontaktschiene 81 und dem inneren Ende der Kontaktschiene 82 ist, wie dargestellt, schräg eine Druckfeder 84 eingesetzt, die durch beiderseitige Stifte oder Vorsprünge gehalten werden kann. Auch in diesem Falle nimmt die Kontaktschiene in der geöffneten Stellung etwa die mit dem Bezugszeichen 82a dargestellte Lage ein. Die Druckfeder 84 ist derart zwischen der Festkontaktschiene 81 und der schwenkbaren Kontaktschiene 82 eingesetzt, daß sie in normaler eingeschalteter Betriebsstellung den Kontaktdruck zwischen den Kontaktstücken 34 und 76 verstärkt, sich jedoch nach Auslösung über eine Totpunktlage hinwegbewegt und die Öffnungskraft verstärkt. Im Öffnungs- bzw. Schwenkbereich der Kontaktstücke 34 können noch vorteilhafterweise Lichtbogenlöschkammern bzw. -lamellen 85 angeordnet sein.The exemplary embodiment of the contactor according to the invention shown in FIGS. 6 and 7 largely corresponds to the contactor according to FIGS. 1 to 5, so that the same reference numerals have been used for all the same parts. Another design has received the fixed contact rail 81, which is also U-shaped, but with a vertical web in the drawing and two horizontal legs, the lower leg having a kink 83, which is used for pivoting a contact rail 82. As shown, a compression spring 84 is inserted obliquely between the upper leg of the fixed contact rail 81 and the inner end of the contact rail 82 and can be held by pins or projections on both sides. In this case too, the contact rail in the open position assumes approximately the position shown with the reference symbol 82a. The compression spring 84 is inserted between the fixed contact rail 81 and the pivotable contact rail 82 in such a way that it increases the contact pressure between the contact pieces 34 and 76 in the normal switched-on operating position, but increases after tripping via a Dead center position moved away and the opening force increased. In the opening or pivoting area of the contact pieces 34, arc quenching chambers or lamellae 85 can advantageously also be arranged.

Die Figuren 8 bis 10 veranschaulichen im Vergleich zu Figur 4 ein anderes vereinfachtes Ausführungsbeispiel einer Betätigungsvorrichtung in drei verschiedenen Betriebsstellungen. Für die gleichen oder gleich wirkenden Teile sind die gleichen Bezugszeichen wie in Figur 4 verwendet worden. Bei diesem Ausführungsbeispiel sind wieder magnetische Auslöser 49 und thermische Auslöser 73 vorhanden, und zwar jeweils ein Auslöser je Phase, also drei Auslöser senkrecht zur Bildebene mit Abstand voneinander, wie oben erläutert worden ist. Die Betätigungsvorrichtung weist auch entsprechend Figur 4 ein Winkelstück 54 auf, dessen Schenkel 55 mit dem in der Zeichnung linken Ende in ein Fenster des Schiebers 48 eingreift und der um ein Lager 57 schwenkbar ist. Bei diesem Ausführungsbeispiel ist aber ein gekröpfter Hebel 91 vorgesehen, der wieder in dem Schwenklager 64 gehalten ist und der in normaler Betriebsstellung gemäß Figur 8 das abgewinkelte Teil 59 des Winkelstücks 54 arretiert, weil die Kante der Nase 60 an der benachbarten Kante der Stufe 65 anliegt. Das linke Ende des gekröpften Hebels 91, das auf der Unterseite zweckmäßigerweise ballig ausgeführt ist, greift in ein Fenster 90 des Ankers 53 bzw. einer unteren Verlängerung des Ankers ein. Wenn nun ein magnetischer Auslöser 49 anspricht, wird der Anker angezogen. Damit schwenkt der gekröpfte Hebel 91 im Uhrzeigersinne um das Schwenklager 64 und gibt das abgewinkelte Teil 59 des Winkelstücks 54 unter dem Druck der Feder 61 frei, so daß der Schieber 48, wie oben beschrieben wurde, wieder schlagartig nach oben bewegt wird und sämtliche beschriebenen Zusatzkontakte öffnet. Diese Betriebsstellung ist in Figur 10 dargestellt. Wenn andererseits ein thermischer Auslöser 73 anspricht, drückt der untere Steg 72 auf eine Nase 94 eines Schwenkhebels 93, der in einem Schwenklager 71 gehalten ist. Durch Wirkung der Druckfeder 92 liegt die Nase 94 des Schwenkhebels an dem Steg 72 an und außerdem leigt der Schwenkhebel 93 mit dem Ballen 68 an einer durch die Feder 92 belasteten Schiene an, die ihrerseits in dem gekröpften Hebel befestigt ist. Diese Schiene 66 kann auch wieder, wie oben beschrieben wurde, als Kompensationsstreifen ausgebildet sein. Durch Ausschwenken des thermischen Auslösers mit dem Steg 72 in Pfeilrichtung (Figur 9) nach links, schwenkt der Schwenkhebel 93 in entsprechender Richtung aus, nimmt die Schiene 66 mit, wodurch auch der gekröpfte Hebel 91 um das Schwenklager 64 im Uhrzeigersinne bzw. in Pfeilrichtung geschwenkt wird, so daß das Winkelstück 54 wie oben beschrieben wieder in die Auslösestellung gelangt und über den Schieber 48 die Kontaktöffnung sämtlicher Zusatzkontakte bewirkt. Im übrigen gelten die obigen Ausführungen im Zusammenhang mit der Figur 4 auch für dieses Ausführungsbeispiel nach den Figuren 8 bis 10.FIGS. 8 to 10 illustrate, in comparison to FIG. 4, another simplified exemplary embodiment of an actuating device in three different operating positions. The same reference numerals as in FIG. 4 have been used for the same or equivalent parts. In this exemplary embodiment, magnetic triggers 49 and thermal triggers 73 are again present, one trigger per phase, that is, three triggers perpendicular to the image plane at a distance from one another, as has been explained above. According to FIG. 4, the actuating device also has an angle piece 54, the leg 55 of which engages with the left end in the drawing in a window of the slide 48 and which can be pivoted about a bearing 57. In this embodiment, however, a cranked lever 91 is provided, which is again held in the pivot bearing 64 and which, in the normal operating position according to FIG. 8, locks the angled part 59 of the angle piece 54 because the edge of the nose 60 rests on the adjacent edge of the step 65 . The left end of the cranked lever 91, which is expediently crowned on the underside, engages in a window 90 of the armature 53 or a lower extension of the armature. If a magnetic trigger 49 now responds, the armature is attracted. Thus, the cranked lever 91 pivots clockwise around the pivot bearing 64 and gives the angled part 59 of the Elbow 54 under the pressure of the spring 61 free, so that the slider 48, as described above, is suddenly moved up again and opens all the additional contacts described. This operating position is shown in Figure 10. On the other hand, when a thermal trigger 73 responds, the lower web 72 presses on a lug 94 of a pivot lever 93, which is held in a pivot bearing 71. Due to the action of the compression spring 92, the nose 94 of the pivot lever bears against the web 72 and, in addition, the pivot lever 93 with the ball 68 bears against a rail loaded by the spring 92, which in turn is fastened in the cranked lever. As described above, this rail 66 can also be designed as a compensation strip. By pivoting the thermal release with the web 72 in the direction of the arrow (FIG. 9) to the left, the pivot lever 93 pivots out in the corresponding direction, takes the rail 66 with it, as a result of which the cranked lever 91 is pivoted clockwise or in the direction of the arrow about the pivot bearing 64 is, so that the angle piece 54 comes back to the release position as described above and causes the contact opening of all additional contacts via the slide 48. Otherwise, the above statements in connection with FIG. 4 also apply to this exemplary embodiment according to FIGS. 8 to 10.

Die Figuren 11 und 12 veranschaulichen im Schema eine besonders wichtige Ausgestaltung, die auch in Figur 6 im Prinzip dargestellt ist, um den Zusammenhang mit den übrigen Teilen des Schützes zu verdeutlichen. Diese in Figur 6 eingezeichneten Vorrichtungsteile sind auch gleichermaßen bei dem Ausführungsbeispiel nach den Figuren 1 bis 5 zu verwenden. Nach dieser Ausgestaltung ist der Schieber 48 als ebene, im wesentlichen rechteckige Platte ausgebildet, die zwischen geeigneten nicht gezeichneten Führungen innerhalb des Gehäuseteils 87 in Richtung des Pfeils 95 verschiebbar ist. Am oberen Ende ist ein Stößel 88 mit einem Stößelknopf zur Handbetätigung befestigt, der durch eine Öffnung in der oberen Gehäusewandung nach außen ragt und der die jeweilige Betriebsstellung sichtbar macht. Die einwärts gedrückte Stellung zeigt die normale Einschaltstellung an. Wenn der Stößel 88 weit nach oben herausragt, erkennt man hieran die Auslösestellung, in der sämtliche zusätzlichen Kontakte geöffnet sind.FIGS. 11 and 12 illustrate a particularly important embodiment in the diagram, which is also shown in principle in FIG. 6 in order to clarify the connection with the other parts of the contactor. These are shown in FIG. 6 Device parts are also to be used equally in the exemplary embodiment according to FIGS. 1 to 5. According to this embodiment, the slider 48 is designed as a flat, substantially rectangular plate which can be displaced between suitable guides, not shown, within the housing part 87 in the direction of the arrow 95. At the upper end, a plunger 88 is fastened with a plunger button for manual actuation, which projects outwards through an opening in the upper housing wall and which makes the respective operating position visible. The inward position indicates the normal on position. If the plunger 88 protrudes far up, you can see the release position in which all additional contacts are open.

Der Schieber 48 weist im unteren Bereich drei Fenster 96, 97 und 98 auf, in welche die Schenkel 55 (Figur 4) bzw. 99, 100 und 101 der Winkelstücke 54 bzw. 102, 103 und 014 eingreifen. Etwa im mittleren Bereich sind in dem Schieber 48 weitere Fenster 105, 106 und 107 eingearbeitet, durch welche die schwenkbaren Kontaktschienen 33 (Figur 4) bzw. 109, 110 und 111 hindurchgeführt sind. Das gleiche gilt für die Kontaktschienen 82 bei dem Ausführungsbeispiel nach Figur 6. Je nach räumlicher Anordnung der zusätzlichen Kontakte 46, 47 bzw. des Kontaktfederbügels 44 für den Spulenanschluß ist in dem Schieber 48 ein weiteres Fenster 108 vorgesehen, welches in Figur 7 aber nur der Deutlichkeit halber und zur besseren Unterscheidung in einem oberen rechten Vorsprung eingezeichnet ist, in der Praxis aber innerhalb der rechteckigen Platte des Schiebers 48 und weiter nach unten hin angeordnet werden kann.The slider 48 has three windows 96, 97 and 98 in the lower area, into which the legs 55 (FIG. 4) or 99, 100 and 101 of the angle pieces 54 or 102, 103 and 014 engage. Approximately in the middle area, further windows 105, 106 and 107 are incorporated in the slide 48, through which the pivotable contact rails 33 (FIG. 4) or 109, 110 and 111 are guided. The same applies to the contact rails 82 in the exemplary embodiment according to FIG. 6. Depending on the spatial arrangement of the additional contacts 46, 47 or the contact spring clip 44 for the coil connection, a further window 108 is provided in the slide 48, which, however, is only shown in FIG For the sake of clarity and for better differentiation, it is drawn in an upper right projection, but in practice it can be arranged within the rectangular plate of the slider 48 and further down.

Durch dieses Fenster 108 ist der Kontaktfederbügel 44 hindurchgeführt. Die Größe der Fenster ist den Gegebenheiten anzupassen, so daß die Kontaktschienen bzw. der Kontaktfederbügel zwar ein gewisses Bewegungsspiel haben, jedoch zwangsweise sicher in Öffnungsstellung und beim Wiedereinschalten in Schließstellung gebracht werden können.The contact spring clip 44 is passed through this window 108. The size of the window is to be adapted to the circumstances, so that the contact rails or the contact spring clip have a certain amount of play, but can inevitably be brought safely into the open position and when switched on again in the closed position.

Von besonderer Wichtigkeit ist ferner, daß zwischen dem Schieber 48 und einem geeigneten Kopfteil 112 eines gemeinsamen Kontaktbrückenhalters des Schützenkontaktsystems eine Sperre vorgesehen ist. Dieses Kopfteil 112 ist in Figur 11 nur schematisch dargestellt. Figur 6 zeigt jedoch deutlich, daß es sich bei diesem Kopfteil um einen Teil handelt, der mit dem Stößel 16 sowie mit dem gemeinsamen Kontaktbrückenhalter und damit mit dem Anker 7 des Schützes in Verbindung steht. Die Sperre ist nun derart angeordnet und ausgebildet, daß ein Wiedereinschalten der zusätzlichen Kontakte, die oben im einzelnen beschrieben worden sind, nur dann möglich ist, wenn alle Hauptkontakte 20, 21, 25, 28 des Schützenkontaktsystems geöffnet sind. Zweckmäßigerweise weist die Sperre einen Querschieber 114 auf. Der Querschieber 114 ist nach dem schieber 48 zu mit einer Schrägfläche 118 versehen, welche mit einem weiteren Fenster 119 des Schiebers 48 zusammenwirkt. Am gegenüberliegenden Ende besitzt der Querschieber 114 einen etwas versetzten Vorsprung 115, der in eine Kerbe 113 bzw. eine Einbuchtung oder Aussparung des Kopfteils 112 einrastbar ist. Der Querschieber 114 ist, wie Figur 12 verdeutlicht, mit einer Druckfeder 117 versehen, welche derart angeordnet ist, daß sie den Querschieber 114 zu dem Schieber 48 hin zu drücken versucht. Zu diesem Zweck ist die Druckfeder 117 beispielsweise in einer länglichen rechteckigen Aussparung des Querschiebers eingesetzt, wobei sich das rechte Ende der Druckfeder an der Wandung der Ausnehmung abstützt und dort beispielsweise durch einen Zapfen oder dergleichen unverschiebbar gehalten ist. Das linke Ende der Druckfeder stützt sich an einem Anschlag 121 an, der beispielsweise in nicht dargestellter Ausführung mit einer Führung 116 verbunden ist.It is also of particular importance that a lock is provided between the slide 48 and a suitable head part 112 of a common contact bridge holder of the contactor contact system. This head part 112 is shown only schematically in FIG. Figure 6 clearly shows, however, that this head part is a part which is connected to the plunger 16 and to the common contact bridge holder and thus to the armature 7 of the contactor. The lock is now arranged and designed such that the additional contacts, which have been described in detail above, can only be switched on again if all main contacts 20, 21, 25, 28 of the contactor contact system are open. The lock expediently has a cross slide 114. The cross slide 114 is provided after the slide 48 with an inclined surface 118 which interacts with another window 119 of the slide 48. At the opposite end, the cross slide 114 has a somewhat offset projection 115, which can be snapped into a notch 113 or an indentation or recess in the head part 112. The cross slide 114, as illustrated in FIG. 12, is provided with a compression spring 117, which is arranged such that it connects the cross slide 114 to the Tried to push slider 48. For this purpose, the compression spring 117 is used, for example, in an elongated rectangular recess in the cross slide, the right end of the compression spring being supported on the wall of the recess and being held immovably there, for example by a pin or the like. The left end of the compression spring is supported on a stop 121, which is connected to a guide 116, for example, in an embodiment not shown.

Der Querschieber 114 ist vorteilhafterweise von einer Führung 116 gehalten, welche eine Verschiebung des Querschiebers in seiner Längsrichtung und zwischen nichtgezeichneten Anschlägen parallel zur Verschieberichtung des Schiebers 48 und des Kopfteils 112 gestattet.The cross slide 114 is advantageously held by a guide 116, which allows the cross slide to be displaced in its longitudinal direction and between stops, not shown, parallel to the displacement direction of the slide 48 and the head part 112.

Die Wirkungsweise dieser Konstruktionseinzelheit nach den Figuren 11 und 12 ist im wesentlichen folgende, wobei von dem Betriebszustand ausgegangen wird, der in Figur 12 dargestellt ist und bei dem sowohl sämtliche Hauptkontakte 20, 21 als auch sämtliche beschriebenen zusätzlichen Kontakte geöffnet sind. Zur Einschaltung bzw. zur Wiedereinschaltung der zusätzlichen Kontakte wird der Stößelkopf 89 durch Niederdrücken betätigt. Dabei gelangt die Kante 120 am oberen Rand des Fensters 119 auf die Schrägfläche 118 des Querschiebers 114, welcher dadurch entgegen dem Druck der Druckfeder 117 nach links verschoben wird, so daß der Vorsprung 115 in die Kerbe 113 einrastet. Das Einschalten der zusätzlichen Kontakte für die drei Phasen erfolgt ohne Last, da die Hauptkontakte des Schützes geöffnet sind. Der zusätzliche Kontakt für den Spulenanschluß wird dabei aber geschlossen, so daß das Schütz nun normal arbeiten, d.h. ein- und ausgeschaltet werden kann. Gleichzeitig geht die Betätigungsvorrichtung in die beschriebene Verriegelungsstellung z.B. nach den Figuren 5 bis 8. Während des Einrastens des Vorsprungs 115 des Querschiebers 114 in die Kerbe 113 liegt beim Herunterdrücken des Schiebers 48 die äußere Kante der Schrägfläche 118 an der linken Wandfläche des Schiebers 48 an. Wenn nun das Schütz eingeschaltet wird, bewegt sich der Stößel 16 mit dem Kopfteil 112 und mit dem gemeinsamen Kontaktbrückenhalter bis zur Einschaltstellung nach unten, wobei der eingerastete Querschieber an oder mit der Führung 116 nach unten mitgenommen wird, bis die Schrägfläche 118 des Querschiebers wieder in das Fenster 119 des Schiebers 48 eingleiten kann, und zwar unter Wirkung der Druckfeder 117. Der Vorsprung 115 rastet dabei aus, so daß nun das Schütz völlig normal arbeiten kann. Wenn im Falle der Auslösung durch die beschriebenen magnetischen oder thermischen Auslöser die zusätzlichen Kontakte für die drei Phasen und für den Spulenanschluß geöffnet worden sind, wird der Schieber 48, wie beschrieben, schlagartig in die oberste Stellung gemäß Figur 12 verschoeben und der Querschieber 114 in die gezeichnete Stellung mitgenommen. Wenn nun ein oder mehrere Hauptkontakte des Schützes verschweißt sind und der Stößel 16 mit dem Kontaktbrückenhalter und dem Kopfteil 112 in unterster Stellung verblieben sind, kann ein Wiedereinschalten durch Drücken des Stößelkopfes 89 nicht erfolgen, weil dann die linke Stirnseite des Vorsprungs 115 des Querschiebers 114 nicht in die Kerbe 113 trifft, sondern auf die rechte äußere Seitenfläche des Kopfteils 112 oberhalb der Kerbe 113. Somit kann der Querschieber 114 nicht nach links verschoben werden und er verbleibt mit seinem rechten Ende in dem Fenster 119 des Schiebers 48 und sperrt damit die Verschiebebewegung des Schiebers 48 in die Einschaltstellung. Erst nach vollständiger Beseitigung der Störung kann nur dann ein Wiedereinschalten erfolgen, wenn die Hauptkontakte des Schützes geöffnet sind.The mode of operation of this constructional detail according to FIGS. 11 and 12 is essentially as follows, starting from the operating state shown in FIG. 12 and in which both all main contacts 20, 21 and all described additional contacts are open. The plunger head 89 is actuated by pressing it down to switch the additional contacts on or on again. The edge 120 on the upper edge of the window 119 reaches the inclined surface 118 of the cross slide 114, which is thereby displaced to the left against the pressure of the compression spring 117, so that the projection 115 engages in the notch 113. The additional contacts for the three phases are switched on without load, since the main contacts of the Contactors are open. The additional contact for the coil connection is closed, however, so that the contactor can now operate normally, ie can be switched on and off. At the same time, the actuating device moves into the locking position described, for example according to FIGS. 5 to 8. While the projection 115 of the cross slide 114 engages in the notch 113, when the slide 48 is pressed down, the outer edge of the inclined surface 118 bears against the left wall surface of the slide 48. If the contactor is now switched on, the plunger 16 with the head part 112 and with the common contact bridge holder moves down to the switch-on position, the latched cross slide being carried along on or with the guide 116 until the inclined surface 118 of the cross slide is in again the window 119 of the slide 48 can slide in, under the action of the compression spring 117. The projection 115 disengages, so that the contactor can now operate completely normally. If, in the event of tripping by the magnetic or thermal triggers described, the additional contacts for the three phases and for the coil connection have been opened, the slide 48, as described, is suddenly moved to the uppermost position according to FIG. 12 and the cross slide 114 in drawn position taken. If one or more main contacts of the contactor are now welded and the plunger 16 with the contact bridge holder and the head part 112 remain in the lowest position, it cannot be switched on again by pressing the plunger head 89, because then the left end face of the projection 115 of the cross slide 114 does not in the notch 113, but on the right outer Side surface of the head part 112 above the notch 113. Thus, the cross slide 114 cannot be shifted to the left and its right end remains in the window 119 of the slide 48 and thus blocks the shifting movement of the slide 48 into the switched-on position. Only after the fault has been completely eliminated can it be switched on again if the main contacts of the contactor are open.

Zusammenfassend seien hier die wesentlichen Vorteile des erfindungsgemäßen Schützes hervorgehoben. Durch die Kompaktheit des Schützes mit allen beschriebenen Funktionen in einem einzigen Gerät ergibt sich im Vergleich mit bekannten Schützen eine erhebliche Anschlußersparnis und eine Platzersparnis für Transport, Lagerhaltung und Montage. Je Strombahn ist eine Kontaktöffnung - im Vergleich mit bekannten Schützen - mehr vorhanden. Dadurch ergibt sich eine große Schaltsicherheit, weil gewährleistet ist, daß immer ein Kontakt je Strombahn öffnet, selbst wenn einzelne oder mehrere Hauptkontakte des Schützes verschweißt sind. Das Schütz selbst kann völlig normal arbeiten, wobei zu berücksichtigen ist, daß ein Schütz während der normalen Lebensdauer eine Schaltleistung bis zu etwa 10 Millionen Schaltungen ausweist. Dem gegenüber schalten die beschriebenen zusätzlichen Kontakte nur im Falle einer Überlast und werden daher nur verhältnismäßig gering belastet, so daß auch deshalb eine große Schaltsicherheit gegeben ist. Es kommt hinzu, daß die zusätzlichen Kontakte nur ohne Last eingeschaltet werden können. Dadurch wird ein Einschaltprellen vermieden. Die gesamte Betätigungsvorrichtung, die man auch als Schaltschloß bezeichnen kann, wird mit ihren thermischen und magnetischen Auslösern nur bei Überisst wirksam. Im Vergleich zu bekannten Motorschutzschaltern, bei denen je Ein- und Ausschaltung eine Betätigung des komplizierten Schaltmechanismus erforderlich ist, ergibt sich bei der Betätigungsvorrichtung bzw. dem Schaltschloß nach der Erfindung nur ein geringes Schaltspiel. Durch den kompakten Aufbau des Schützes mit einem an sich ganz normalen Schützteil gemäß Figur 1 ergibt sich der weitere Vorteil, daß man Zusatzteile, wie Hilfskontaktböckchen oder Module ansetzen bzw. aufbauen kann.In summary, the main advantages of the contactor according to the invention are emphasized here. The compactness of the contactor with all the functions described in a single device results in considerable connection savings and space savings for transport, storage and assembly in comparison with known contactors. There is one contact opening per current path - in comparison with known contactors - more. This results in a high degree of switching reliability, because it is ensured that one contact per current path always opens, even if one or more main contacts of the contactor are welded. The contactor itself can operate completely normally, taking into account that a contactor has a switching capacity of up to approximately 10 million switching operations during the normal service life. In contrast, the described additional contacts switch only in the event of an overload and are therefore only loaded to a relatively small extent, so that there is also a high degree of switching reliability. In addition, the additional contacts can only be switched on without load. This prevents bouncing. The entire actuator, which is also called Switch lock can only be effective with its thermal and magnetic triggers if it is overshot. Compared to known motor protection switches, in which an actuation of the complicated switching mechanism is required for each switching on and off, there is only a small switching cycle in the actuating device or the switching lock according to the invention. The compact construction of the contactor with a contactor part according to FIG. 1 which is quite normal per se results in the further advantage that additional parts, such as auxiliary contact blocks or modules, can be attached or constructed.

Claims (24)

  1. Contactor with a casing (2, 3), in which towards the assembly side (5), a magnet system (6-9, 13) and at a distance from the assembly side (5), a contact system (19-21; 24, 25, 28, 29) able to be actuated by the magnet system (6-9, 13) and comprising main contacts (20, 21; 25, 28) with double contact breaking are located, likewise within the casing (2, 3, 87), thermal tripping devices (73) and magnetic tripping devices (49) being provided for each phase, which devices act by means of an actuating device on the contact system, characterised in that provided in the current path of the main contacts (20, 21; 25, 28) of the contact system (19, 20, 21; 24, 25, 28, 29) are additional contacts (33, 34, 76, 77; 44, 46, 47), which are permanently closed during the normal switching operation, for each phase and for the coil connection of the magnet system, and that the thermal tripping devices (73), the magnetic tripping devices (49) and the actuating device (48, 55, 57, 58, 62, 70) are arranged and constructed so that at the time of tripping all the additional contacts (33, 34, 76, 77; 44, 46, 47) are forcibly opened as a result of a disturbance.
  2. Contactor according to Claim 1, characterised in that the actuating device comprises a first angle member (54), which acts by an inwardly directed leg (55) on a slide (48) and whereof the web (58) is locked in the normal operating position by a second angle member (62) and released at the time of tripping of at least one magnetic or thermal tripping device (49; 73), and that the slide (48) is designed so that the additional contacts (34, 76; 46, 47) of the phases and of the coil connection can be opened forcibly by the slide.
  3. Contactor according to Claim 1 or 2, characterised in that acting on the first angle member (54) is a compression spring (61), which is located between the central part of the web (58) of the first angle member (54) and the inner wall of the casing.
  4. Contactor according to Claim 2 or 3, characterised in that the second angle member (62) acts by a leg (63) on the armature (53) of the magnetic tripping device (49), is held in a swivel bearing (64) and is connected to the other leg by a third angle member (70), which in turn acts on a thermal tripping device (73).
  5. Contactor according to one of Claims 2 to 4, characterised in that the second angle member (62) is provided with a step (65), in which the nose (60) or the outer end of the web (58) of the first angle member (54) may snap into abutment.
  6. Contactor according to one of Claims 2 to 5, characterised in that attached to the second angle member (62) is a compensation strip (66) for compensation to the ambient temperature, whereof the free end bears against a ball (68) of a lever arm (67), which is connected to the third angle member (70) at a point (69), whereof the distance from the swivel bearing (64) of the second angle member (62) is greater than the distance of the attachment point (71) of the two angle members (62, 70) to each other and this swivel bearing (64).
  7. Contactor according to one of the preceding Claims, characterised in that tilting contact bars (33; 82) are provided for the formation of the additional contacts for the phases, at the free ends of which bars contact pieces (34) are provided, which cooperate with fixed contact pieces (76) of fixed contact bars (77).
  8. Contactor according to Claim 7, characterised in that springs (35; 84) act on the contact bars (33; 82).
  9. Contactor according to Claim 8, characterised in that the spring (35) is constructed as a tension spring and located so that in the normal operating position it increases the contact pressure, but after tripping moves beyond a dead-centre position and increases the opening force.
  10. Contactor according to Claim 8, characterised in that the spring (84) is constructed as a compression spring and is inserted between the fixed contact bar (81) and the tilting contact bar (82) so that in the normal operating position it increases the contact pressure, but after tripping moves beyond a dead-centre position and increases the opening force.
  11. Contactor according to one of the preceding Claims, characterised in that the additional contact for the coil connection is formed by a contact spring clip (44), which is connected at one end to a current-carrying bar (45) of the coil connection and at the other free end supports a movable contact piece (47), which cooperates with a fixed contact piece (46) of a coil connection bar (41, 43).
  12. Contactor according to one of Claims 2 to 12, characterised in that the slide (48) comprises a plunger (88), which projects outwards through a window in the casing.
  13. Contactor according to one of the preceding Claims, characterised in that the additional contacts (33, 34, 76, 77; 44, 46, 47), the thermal tripping devices (73), the magnetic tripping devices (49) and the actuating device (48, 55, 57, 58, 62, 70) are located in a separate casing part (87), which is adapted to the contactor casing (2, 3) and detachably connected thereto.
  14. Contactor according to one of the preceding Claims, characterised in that arc quench chambers (85) are arranged in the tilting region of the contact bars (33; 82) of the additional phase contacts (34).
  15. Contactor according to Claim 1, characterised in that the actuating device comprises an angle member (54), which acts by an inwardly directed leg (55) on a slide (48) and whereof the web (58) with a bent part (59) is locked by a cranked lever (91) in the normal operating position.
  16. Contactor according to Claim 15, characterised in that a tilting lever (93) held in a bearing (71) is provided, which lever bears by a nose (94) against a swinging-out web (72) of a thermal tripping device (73) and at the time of tripping acts on a spring-loaded bar (92) or a compensation strip (66), which is attached to the cranked lever (91).
  17. Contactor according to one of Claims 2 to 16, characterised in that the slide (48) is constructed as a flat plate guided parallel to the displacement direction (95), which plate comprises windows (96, 97, 98) or recesses, in which the legs (55; 99, 100, 101) of the tiltable angle members (54; 102, 103, 104) engage.
  18. Contactor according to Claim 17, characterised in that the slide (48) comprises further windows (105, 106, 107; 108), through which the tilting contact bars (33; 82; 109, 110, 111) as well as the contact spring clip (44) are guided.
  19. Contactor according to one of Claims 2 to 18, characterised in that provided between the slide (48) and a head part (112) of a common contact bridge holder of the contactor contact system is a barrier, which is arranged and constructed so that reclosing of the additional contacts (33, 34, 76, 77; 44, 46, 47) is only possible when all the main contacts (20, 21, 25, 28) of the contactor contact system are open.
  20. Contactor according to Claim 19, characterised in that the barrier is constructed as a transverse slide (114).
  21. Contactor according to Claim 19 or 20, characterised in that the head part (112) is provided with a notch (113), an indentation or recess, in which a projection (115) of the transverse slide (114) may be engaged.
  22. Contactor according to one of Claims 19 to 21, characterised in that towards the slide (48), the transverse slide (114) comprises an inclined surface (118), which cooperates with a window (119) in the slide (48).
  23. Contactor according to one of Claims 19 to 22, characterised in that the transverse slide (114) is provided with a compression spring (117), which is constructed so that it pushes the transverse slide (114) towards the slide (48).
  24. Contactor according to one of Claims 19 to 23, characterised in that the transverse slide (114) is held by a guide (116), which allows a displacement of the transverse slide (114) in its longitudinal direction and between stops parallel to the displacement direction of the slide (48) and of the head part (112).
EP87117364A 1987-11-25 1987-11-25 Contactor Expired - Lifetime EP0317660B1 (en)

Priority Applications (11)

Application Number Priority Date Filing Date Title
ES198787117364T ES2035843T3 (en) 1987-11-25 1987-11-25 CONTACTOR.
AT87117364T ATE82087T1 (en) 1987-11-25 1987-11-25 PROTECTION.
EP87117364A EP0317660B1 (en) 1987-11-25 1987-11-25 Contactor
DE8787117364T DE3782499D1 (en) 1987-11-25 1987-11-25 Schuetz.
CN88103874.1A CN1033337A (en) 1987-11-25 1988-06-22 Contactor
CA000582438A CA1295358C (en) 1987-11-25 1988-11-07 Contactor and/or circuit breaker
AU24994/88A AU608488B2 (en) 1987-11-25 1988-11-10 Contactor and/or circuit breaker
US07/272,289 US4931757A (en) 1987-11-25 1988-11-17 Contactor and/or circuit breaker
NO885256A NO171526C (en) 1987-11-25 1988-11-24 KONTAKTOR
DK655388A DK655388A (en) 1987-11-25 1988-11-24 RELAY
BR888806185A BR8806185A (en) 1987-11-25 1988-11-24 CONTACTOR

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP87117364A EP0317660B1 (en) 1987-11-25 1987-11-25 Contactor

Publications (2)

Publication Number Publication Date
EP0317660A1 EP0317660A1 (en) 1989-05-31
EP0317660B1 true EP0317660B1 (en) 1992-11-04

Family

ID=8197473

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87117364A Expired - Lifetime EP0317660B1 (en) 1987-11-25 1987-11-25 Contactor

Country Status (11)

Country Link
US (1) US4931757A (en)
EP (1) EP0317660B1 (en)
CN (1) CN1033337A (en)
AT (1) ATE82087T1 (en)
AU (1) AU608488B2 (en)
BR (1) BR8806185A (en)
CA (1) CA1295358C (en)
DE (1) DE3782499D1 (en)
DK (1) DK655388A (en)
ES (1) ES2035843T3 (en)
NO (1) NO171526C (en)

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EP1643525B1 (en) * 2004-09-29 2007-10-31 ABB Schweiz AG Adjusting module for an overcurrent tripping device of a protection circuit breaker
DE102004062269A1 (en) * 2004-12-23 2006-07-13 Siemens Ag Method and device for safe operation of a switching device
DE102004062270B4 (en) * 2004-12-23 2012-08-30 Siemens Ag Method and device for safe operation of a switching device and switching device
CN1866446B (en) * 2005-05-20 2011-11-02 拉森特博洛有限公司 Device for sealing overloading relay in closing state
WO2008000200A1 (en) * 2006-06-30 2008-01-03 Siemens Aktiengesellschaft Method and device for secure operation of a switch unit
US20110037543A1 (en) * 2007-10-11 2011-02-17 Dale Walter Lange Electrical switching device
US7834724B2 (en) * 2008-04-15 2010-11-16 General Electric Company Electromechanical interlock for electrical protection devices
WO2010000144A1 (en) * 2008-07-04 2010-01-07 湖北盛佳电器设备有限公司 Breaker with short circuit self-locking function
US8093965B2 (en) * 2008-12-03 2012-01-10 Schneider Electric USA, Inc. Add-on trip module for multi-pole circuit breaker
US8035467B2 (en) * 2008-12-03 2011-10-11 Mittelstadt Chad R Add-on trip module for multi-pole circuit breaker
US8093964B2 (en) * 2008-12-29 2012-01-10 Schneider Electric USA, Inc. Add-on trip module for multi-pole circuit breaker
CN102339696B (en) * 2010-07-15 2014-09-24 北京翠祥电器元件有限公司 Circuit breaker with selective protection
US9396898B2 (en) * 2013-03-15 2016-07-19 Rockwell Automation Technologies, Inc. Multipole electromechanical switching device
KR101513207B1 (en) * 2013-11-08 2015-04-17 엘에스산전 주식회사 Magnetic contactor
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JP2016110843A (en) 2014-12-05 2016-06-20 オムロン株式会社 Electromagnetic relay
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JP6414453B2 (en) 2014-12-05 2018-10-31 オムロン株式会社 Electromagnetic relay
CN104576224B (en) * 2014-12-29 2016-08-24 温州大学 The permanent magnetism type contactor operation device of band dropout safety
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Also Published As

Publication number Publication date
NO885256L (en) 1989-05-26
NO171526B (en) 1992-12-14
AU608488B2 (en) 1991-03-28
ATE82087T1 (en) 1992-11-15
CN1033337A (en) 1989-06-07
ES2035843T3 (en) 1993-05-01
AU2499488A (en) 1989-05-25
DK655388A (en) 1989-05-26
BR8806185A (en) 1989-08-15
CA1295358C (en) 1992-02-04
EP0317660A1 (en) 1989-05-31
DE3782499D1 (en) 1992-12-10
NO171526C (en) 1993-03-24
US4931757A (en) 1990-06-05
NO885256D0 (en) 1988-11-24
DK655388D0 (en) 1988-11-24

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