Switching mechanism and electronic switching type low-voltage protection switching device

Abstract

The invention relates to a switching mechanism (10) for an electronically switchable low-voltage protection switching device (1), comprising a housing (11), a switching element (20) which is accommodated and held in the housing (11), and a switching shaft (30) which is rotatably arranged in the housing (11) and is mechanically coupled to the switching element (20), on which switching shaft at least one moving contact element (9) is fastened, the at least one moving contact element can be moved between an on position and an off position by means of a switching shaft (30). Furthermore, the switching mechanism (10) has an electronic triggering unit (50) which is coupled to the switching member (20) such that triggering of the electronic triggering unit (50) causes a movement of the moving contact element (9) from the on position into the off position. Furthermore, the switching mechanism (10) has: a manually actuatable first actuating element (41), which is mechanically coupled to the switching member (20) and which can be moved linearly in a first direction from a first position to a second position in order to manually switch on the protective switching device (1); and a manually actuatable second actuation element (42), which is mechanically coupled to the switching member (20) and is linearly movable into a third position in order to manually switch off the protection switching device (1). In this way, a compact switching mechanism can be achieved.

Description

[0001] The invention relates to a switching mechanism for an electronic switching type low-voltage protection switch device and an electronic switching type low-voltage protection switch device having such a switching mechanism.

[0002] Switching devices are used in industrial low-voltage circuits or networks to connect consumers to the network and to undertake protection tasks in the power grid. Conventional electromechanical switching devices are devices with a strictly defined range of functions. For this purpose, they include, for example, power switches, line protection switches or fault current protection switches, as well as (load) disconnect switches or arc or burn protection switches. These switches are used for electrical circuit monitoring and protection, and are used in particular as switching elements and fuses in power supply and distribution networks. Therefore, conventional electromechanical power switches can, for example, guide current and control and switch overcurrents and short-circuit currents. These devices are developed and delivered according to product standards. In the technological transition from conventional contact switches to power electronic switches with the aid of semiconductors, the previously fixed range of functions has been questioned. Power semiconductors can perform various electrical tasks quickly and frequently here.

[0003] The term "low voltage" here refers to voltages up to 1000 V AC or 1500 V DC. In particular, the term "low voltage" refers to voltages greater than the so-called low voltage of 50 V AC or 120 V DC.

[0004] Furthermore, the term "low-voltage circuit" refers to a circuit with a current of up to 6300 A, more particularly up to 1600 A, 1200 A, 630 A, 125 A, 80 A, 63 A, 40 A, 25 A or 16 A. The current values ​​mentioned are in particular the nominal current and / or the cut-off current, i.e. the maximum current conducted through the circuit under normal circumstances or the current which normally interrupts an electrical circuit, for example by a switching device or a protective switchgear.

[0005] Circuit breakers or disconnect switches are electrical actuation systems designed to manually disconnect electrical low-voltage circuits or low-voltage devices (devices) without load (current). Electrical disconnection under load cannot be achieved or can only be achieved to a limited extent with conventional circuit breakers, and may cause damage to the circuit breaker due to arcing generated during disconnection.

[0006] In contrast, load breakers or load-break switches are electrical actuation systems that are designed for manually electrically disconnecting electrical low-voltage circuits or low-voltage devices (devices) under load. For this purpose, load breakers have, for example, an arc extinguishing device, by means of which the arc light generated by the switching element of the load breakers during electrical disconnection under load can be diverted and extinguished in a heat-resistant section of the arc extinguishing device (for example, an arc extinguishing chamber). In this way, thermal overloading of sensitive components of the load breakers caused by arc light is avoided.

[0007] A particular embodiment of a circuit breaker or load disconnector is a load disconnector with a fuse, such as a fused load disconnector or a fused load-break switch. This is a load disconnector which additionally has a power fuse, such as a so-called NH fuse.

[0008] In contrast, power switches, line circuit breakers and residual current circuit breakers are known, in which the circuit is automatically interrupted under certain conditions of overcurrent, short circuit or fault current. After the interruption, these switching devices can be switched on again (relatively quickly). Manual disconnection is also provided. Power switches, line circuit breakers and residual current circuit breakers are protective switching devices that function similarly to fuses: they are inserted into the circuit of the electrical consumer, monitor the current flowing through them and interrupt the current when a predetermined protection parameter (such as a current limit or a current-time limit) is exceeded. This interruption of the low-voltage circuit (also called tripping) is achieved mechanically by (automatic) disconnection of one or more mechanical contacts.

[0009] In recent years, (purely) electronically operated switchgear has also been developed and made available on the market, in which the current is reduced or interrupted by semiconductors. Such "semiconductor switches", which are referred to in the English professional literature as "Solid State Circuit Breakers (SSCBs, solid-state circuit breakers)", have an electronic switching unit, with the aid of which a purely semiconductor-based closing and opening of the power connection can be achieved. However, semiconductor switches also require a mechanical switching mechanism with conventional switching contacts in order to be able to achieve a galvanic isolation of the monitored load circuit from the power supply network. However, especially in the case of compact switchgear types, such additional components place high demands on the spatial design of the low-voltage protective switchgear.

[0010] The object of the present invention is therefore to provide a switching mechanism for an electronically switching low-voltage protection switch device and an electronically switching low-voltage protection switch device having such a switching mechanism, which are characterized by a space-saving design and simple assembly.

[0011] The object of the present invention is to provide a space-saving and cost-effective construction concept for such an electronic switching low-voltage protection switchgear.

[0012] According to the invention, this object is achieved by a switching mechanism for an electronically switching low-voltage circuit breaker and an electronically switching low-voltage circuit breaker having such a switching mechanism according to the independent claims. Advantageous embodiments are the subject matter of the dependent claims.

[0013] The switch mechanism for an electronic switch type low voltage protection switch device according to the present invention has a housing, a switch member received and held in the housing, and a switch shaft rotatably arranged in the housing and mechanically connected to the switch member, on which at least one moving contact element is fastened, and the at least one moving contact element can move between an on position (EIN-Stellung) and an off position (AUS-Stellung) by means of the switch shaft. In addition, the switch mechanism has an electronic trigger unit, which is connected to the switch member so that triggering the electronic trigger unit causes the movement of the contact element from the on position to the off position. In addition, the switch mechanism has: a manually actuatable first actuating element, which is mechanically connected to the switch member and can be linearly moved from a first position to a second position in a first direction so as to manually connect the protection switch device; and a manually actuatable second actuating element, which is mechanically connected to the switch member and can be linearly moved to a third position so as to manually turn off the protection switch device.

[0014] By means of a first actuating element and a second actuating element, the electronic switch type low-voltage protection switch device can be manually (i.e., by hand) switched on and off, wherein the monitored load circuit is galvanically isolated from the power supply network by opening the switch contacts via the switch member and the switch shaft connected thereto. When the switch contacts are opened, the moving contact element moves away from its assigned fixed contact element, i.e., moves from its switched position to its switched position.

[0015] The first actuating element and the second actuating element form a linearly actuatable two-part button, wherein the first actuating element is used to manually switch on the electronic switch type low-voltage protection switch device, and the second actuating element is used to manually switch off the electronic switch type low-voltage protection switch device. Such an electronic switch type low-voltage protection switch device is also referred to as a "semiconductor switch" or "semiconductor switch device". Here, the switching, i.e. the disconnection and reconnection of the current are realized by means of power semiconductors. The additionally present mechanical switching contacts are only used for additional current isolation of the monitored load circuit from the power supply network, for example in order to perform work on the load circuit.

[0016] The electronic trigger unit can be electronically controlled, for example, by controlling the electronic switch type low-voltage protection switch device. Due to the connection with the switch component, which can be realized, for example, mechanically, electrically or magnetically, the switching contacts can be disconnected by triggering the electronic trigger unit. In this way, by controlling the electronic switch type low-voltage protection switch device, the current isolation can be caused by the electronic trigger unit by disconnecting the switch contacts. This current isolation can also be activated remotely, as long as the electronic switch type low-voltage protection switch device has corresponding communication means for remote control.

[0017] In an advantageous development of the switching mechanism, the second actuating element moves with the first actuating element when it is moved into the second position and can be moved therefrom independently of the first actuating element into a third position in order to manually switch off the circuit breaker device.

[0018] In this way, a compact design of a button having two actuating elements (a first actuating element for manually switching on the electronic switch type low-voltage protection switch device and a second actuating element for manually switching off the electronic switch type low-voltage protection switch device) and thus a compact design of a switch mechanism can be achieved. In addition, by actuating the first actuating element when the protection switch device is in the switched-on state, i.e. when the switch contacts are closed, an unintentional switching off cannot be achieved by hand.

[0019] In another advantageous improvement of the switching mechanism, the switching component has a trigger lever movably supported in the housing, which is mechanically operatively connected to the first actuating element, wherein a first end of the trigger lever is mechanically coupled to the switch shaft and a second end of the trigger lever can be locked to a latch movably supported in the housing.

[0020] By using a trigger lever that can be locked to a movably supported catch, the switch component can be preloaded with a relatively high force when the switch contacts are switched on (i.e. closed) by moving the first actuating element in a first direction to its second position. When the protective switch device is triggered, for example manually by moving the second actuating element to a third position, the preload force is released by releasing the lock so that the switch shaft is driven and the switch contacts are opened as quickly as possible. In this way, a compact switch component with a relatively high force can be easily and cost-effectively realized.

[0021] In a further advantageous development of the switching mechanism, the switching member has a rotatably mounted drive lever, by means of which the trigger lever is mechanically operatively connected to the first actuating element.

[0022] By means of the rotatably mounted drive lever, a linear movement of the first actuating element can be transmitted to the triggering lever in a simple manner.

[0023] In a further advantageous development of the switching mechanism, the electronic tripping unit is designed to act mechanically on the latch in order to release the locking of the tripping lever in order to thereby enable a movement of the moving contact element from its switched position into its switched position.

[0024] Since the electronic trigger unit acts on the latch mechanically, for example by means of a movably supported push rod, and thereby releases the lock on the switch component, the same switch component can be used both to manually trigger the protective switch device via a second actuating element and to electronically initiate the trigger via the electronic trigger unit, thereby achieving a compact design of the switch mechanism.

[0025] In a further advantageous development of the switching mechanism, the first actuating element can be mechanically locked in the first position.

[0026] In this way, for example, during electrical installation work, inadvertent manual switching of the electronic switching low-voltage protection switch device can be effectively avoided. For this purpose, for example, mechanical locks are used, which are guided through the opening of the movable element (here the first actuating element) to prevent the movement of this element.

[0027] In another advantageous improvement of the switching mechanism, the first actuating element has a free-running slot which allows an intermediate position between the first position and the second position, in which the first actuating element can be mechanically locked in the switched-on state of the protective switch device (so that it can no longer be switched off manually).

[0028] By means of the free-running slide, the first actuating element can be moved to the intermediate position without any influence on the switch member. Therefore, the movement of the first actuating element from the second position to the intermediate position will not further influence the switch member. The second actuating element is moved to the intermediate position together by the synchronizing element, so that the second actuating element can no longer move to the third position. In this way, unintentional manual shutdown of the electronic switch type low-voltage protection switch device is effectively prevented.

[0029] The electronic switching low-voltage protection switch device according to the invention has an insulating material housing in which a switching mechanism of the above-mentioned type is accommodated and held.

[0030] With regard to the advantages of the electronic switching low-voltage protection switch device according to the invention, reference is made to the above-mentioned advantages with regard to the switching mechanism according to the invention.

[0031] The following will describe in detail an embodiment of a switch mechanism for an electronic switch type low voltage protection switch device with reference to the accompanying drawings. In the accompanying drawings:

[0032] Figure 1 A schematic diagram showing a switching mechanism of a known low-voltage protection switch device in a side view;

[0033] Figure 2 and Figure 3 Schematic diagrams of the switch mechanism according to the present invention are respectively shown in three-dimensional views;

[0034] Figure 4 A schematic diagram showing a switching mechanism according to the present invention in a first operating state in a side view;

[0035] Figure 5 A schematic diagram showing a switching mechanism according to the present invention in a second operating state in a side view;

[0036] Figure 6 and Figure 7 Schematic diagrams of the switch mechanism according to the present invention in two other operating states are shown in side views respectively;

[0037] Figures 8 to 11 A schematic diagram showing two locking positions of an electronic switch type low-voltage protection switch device 1 is shown.

[0038] In the different figures of the drawings, the same reference numerals are used for the same parts throughout. This description applies to all figures, in which corresponding parts can be seen equally.

[0039] Figure 1 A low-voltage protection switch device 1 known in the prior art is shown in a side view. The protection switch device 1 has an insulating material housing 2, which has a front side 3, a fastening side 4 opposite to the front side, and a narrow side and a wide side connecting the front side and the fastening side. On the front side 3, an actuating element 5 that is rotatably supported in the insulating material housing 2 and can be actuated manually is arranged. Inside the insulating material housing 2, a switch contact 7 is also arranged, which has a fixed contact element 8 arranged in a fixed position in the insulating material housing 2 and a moving contact element 9 that can move relative to it. The moving contact element 9 is mechanically in operative connection with the manually actuable actuating element 5 via a switch member 6, so that the switch contact 7 can be opened and closed by actuating the actuating element 5.

[0040] The front side 3 of the low-voltage protection switch device 1 is not flat, but has a typical shape for low-voltage switch devices according to the IEC standard, which has a protruding middle section 3-1 and a connecting section 3-2 that is recessed toward the narrow side. In this way, a construction volume is formed in the head area of ​​the insulating material housing 2, in which the actuating element 5 and a part of the switching member 6 are arranged.

[0041] It can also be said that the switch member 6 with the manually actuatable actuating element 5 and the switch contact 7 consists of a plurality of individual mechanical elements which mechanically interact when the protective switching device is switched on or off and form a mechanical action chain in order to close or open the switch contact 7 with the force required for this when the actuating element 5 is actuated. Figure 1 The structural space required for a plurality of such mechanical elements for the switch member 6 represented by the outline in the figure occupies the vast majority of the overall available construction volume in the insulating material housing 2, which in the case of an electronic switching low-voltage protection switch device is mainly occupied by power electronic devices and their cooling devices.

[0042] exist Figure 2 and Figure 3 A compact switch mechanism 10 for a four-pole electronic switch type low-voltage protection switch device is schematically shown in a three-dimensional view. The switch mechanism 10, which is provided according to the invention for assembly in the head region of an insulating material housing of an electronic switch type low-voltage protection switch device, has a switch member 20, which is received and retained in the housing 11 of the switch mechanism 10. In the example shown, the various parts of the housing 11 are connected by means of rivets 16 and clamps 17. However, this should only be understood as an example and is not the key to the present invention.

[0043] In addition, the switch mechanism 10 has a manually actuatable button 40, which has a manually actuatable first actuating element 41 and a manually actuatable second actuating element 42. Here, the first actuating element 41 has a first opening 43 and a second opening 44, by means of which the button 40 can be prevented from unauthorized actuation, i.e., unauthorized switching on or off.

[0044] In addition, the switch mechanism 10 has a switch shaft 30 rotatably supported in the housing 11, on which four moving contact elements 9 are fastened, one for each pole of the four-pole electronic switch type low-voltage protection switch device. The moving contact elements 9 are respectively switch contacts 7 (see Figures 4 to 7 ), in which the correspondingly assigned fixed contact elements 8 are arranged, i.e. received and held in an insulating material housing of an electronic switching type low-voltage protection switch device.

[0045] In order to galvanically isolate the circuit protected by the low-voltage protection switch device when necessary, the switch mechanism 10 according to the invention has an electronic trigger unit 50, which can be electronically controlled in a predetermined event such as a short circuit, a fault current or an electrical overload to interrupt the current flowing through the protected circuit and to galvanically isolate the circuit from the power supply network. For this purpose, the electronic trigger unit 50 has a movable trigger element, which is designed to act on the switch member 20 in the event of a trigger, so as to open the switch contact 7 in this way.

[0046] Figure 2 and Figure 3 The switch mechanism 10 shown in is configured to be installed in a four-pole electronic switch type low-voltage protection switch device. However, this is not the crux of the invention: by using a correspondingly shortened switch shaft installed in a correspondingly shorter housing, a switch mechanism can also be formed for a two-pole or three-pole electronic switch type low-voltage protection switch device, which can be installed in a correspondingly adapted insulating material housing of a two-pole or three-pole electronic switch type low-voltage protection switch device. Here, the basic operating mode of the switch component 20 (except for the switching force that occurs) depends largely on the number of poles to be switched. Therefore, the following will use Figures 3 to 6 The mode of operation of the switch element 20 will be explained in more detail.

[0047] exist Figures 4 to 7 The side views schematically show the Figure 2 and Figure 3 Different operating states of a compact switching mechanism 10 for an electronic switching low-voltage protection switch device are known. Figure 4 The switching mechanism 10 according to the invention is shown in a first operating state, which corresponds to the switched-off state of the electronic switching low-voltage protection switch device. Here, the first actuating element 41 and the second actuating element 42 are in their first position, in which the first opening 43 and the second opening 44 are open and accessible, i.e. protrude from the front side 3 of the insulating material housing 2 of the electronic switching low-voltage protection switch device 1. Figure 5 The switching mechanism 10 according to the invention is shown in a second operating state, which corresponds to the switched-on state of an electronic switching low-voltage protection switch device. The first actuating element 41 and the second actuating element 42 are here in their second position.

[0048] The switch member 20 has a driving lever 22 rotatably supported in the housing 11, which is mechanically connected to the first actuating element 41 by a driving rod 23. The driving lever 22 is mechanically connected to the trigger lever 24 guided in the slide groove 26 of the switch member 20 by a clamp 25. When the low-voltage protection switch device is turned on, that is, when the first actuating element 41 is pressed downward from the first position to the second position, the driving lever 22 moves counterclockwise by the driving rod 23. Here, the button 40 is structurally designed so that when the first actuating element 41 is pressed, the second actuating element 42 also moves downward to the second position. The synchronizer 21 displaceably supported in the housing 11 below the second actuating element 42 has not been actuated when the second actuating element 42 moves from the first position to the second position.

[0049] Due to the counterclockwise movement of the driving lever 22, the trigger lever 24 is driven to move rightward in the sliding groove 26 by the clamp 25 connected to the driving lever 22. Here, the lower end of the trigger lever 24 is supported on a latch 27 (see FIG. 2 ) which is rotatably supported in the housing 11. Figure 5 ), whereby the upper end of the trigger lever 24 moves to the right during further movement. This upper end of the trigger lever 24 is mechanically coupled to the switch shaft 30 via another clamp 28, so that the switch shaft moves clockwise during the switching process, whereby the moving contact 9 moves in the direction of the assigned fixed contact 8, thereby closing the switch contact 7. The contact force required for this is introduced here by a contact spring 32 engaged on the switch shaft 30, which is supported in the housing 11 for this purpose.

[0050] Figure 6 and Figure 7 Two further operating states of the switching mechanism 10 according to the invention are shown. Figure 6 The operating state is shown after the triggering is electronically initiated by the electronic triggering unit 50 due to the detection of a fault event (e.g. a short circuit or a fault current or an electrical overload). For this purpose, the electronic triggering unit 50 has a movable triggering element (not shown) which is designed to act on the switching member 20 in the event of a triggering, so as to thereby achieve the opening of the switch contact 7.

[0051] In the switched-on state, i.e. when the switch contact 7 is closed (see Figure 5), the pawl 27 has reached the right end of the slide slot 26 and is supported by its lower end in the locked position of the pawl 27. The electronic trigger unit 50 acts on the pawl 27 by means of a movable trigger element (not shown), causing it to move clockwise. As a result, the locked position between the trigger lever 24 and the pawl 27 is released. The lower end of the trigger lever 24 is no longer supported. Since the clamp 25 fixes the trigger lever 24 to the right end of the slide slot 26, the trigger lever 24 rotates counterclockwise in this position, whereby the lower end of the trigger lever 24 moves to the right and the upper end of the trigger lever 24 moves to the left. Since the upper end of the trigger lever 24 moves to the left, the switch shaft 30 moves counterclockwise, thereby disconnecting the switch contact 7.

[0052] Figure 7 FIG. 1 shows another operating state of the switch mechanism 10 according to the present invention after manual start triggering. When the electronic switch type low-voltage protection switch device is manually triggered, the second actuating element 42 is manually moved from Figure 5 The second position shown in FIG. 1 , which corresponds to the on state of the low-voltage protection switch device, is pressed downward toward Figure 7 The third position shown, while the first actuating element 41 remains in the second position (see Figure 7 In other words: the movement of the second actuating element 42 from the second position to the third position is independent of the first actuating element 41 which is still in the second position.

[0053] When the second actuating element 42 moves to the third position, the synchronizer 21 (see Figure 3 and Figure 4 ) moves downwards and acts on the catch 27, thereby releasing the locked position between the trigger lever 24 and the catch 27. As has been implemented above for the electronic start trigger, the lower end of the trigger lever 24 is no longer supported, so the switch shaft 30 moves counterclockwise and opens the switch contact 7.

[0054] In order to return the drive lever 22 and the catch 27 to their respective original positions in both cases (i.e., in the case of electronic and manual triggering), corresponding return springs 29 are provided, which are each supported in the housing 11 and act on the drive lever 22 or the catch 27 respectively to return it to its original position (in the case of electronic and manual triggering). Figure 4 Here, the first actuating element 41 is also reset to its original initial position by the drive rod 23. Figure 4 The first position is shown. In this case, the first actuating element 41 has a synchronizing element (not shown) which ensures that the movement of the first actuating element 41 into the first position also resets the second actuating element 42 into the first position again.

[0055] With reference to a schematic diagram showing a three-dimensional view of an electronic switching low-voltage protection switch device 1 according to the invention Figures 8 to 11 , two different locking positions of the switch mechanism 10 according to the present invention are explained in detail below.

[0056] Here, Figure 8 The electronic switch type low voltage protection switch device 1 according to the present invention is shown in the off state, wherein the switch mechanism 10 is in the off state. Figure 4 The first operating state is shown and described above. The first and second actuating elements 41, 42 are in their first position, wherein the through openings (first opening 43 and second opening 44) formed in the first actuating element 41 protrude from the front side 3 of the insulating material housing 2 of the electronic switch type low-voltage protection switch device 1. In order to protect the electronic switch type low-voltage protection switch device from unauthorized connection in the off state, a locking element (e.g. a clamp 46 of an annular lock 45) is guided through the first opening 43. In this way, it is ensured that the first actuating element 41 can be moved from its first position to its second position. Inadvertent or unauthorized connection of the electronic switch type low-voltage protection switch device 1 is effectively prevented.

[0057] With the help of Figures 9 to 11 The locking position in the switched-on state of the electronic switching low-voltage protection switch device 1 according to the invention is explained in detail. Fig. 9 The low-voltage protection switch device 1 is shown in the switched-on state with the switch contact 7 closed, and the switch mechanism 10 is in the switched-on state. Figure 5 In the second operating state shown and described above, the first actuating element is correspondingly in its second position. In this state, the first actuating element 41 can be lifted by hand in the direction of its first position (see Fig.10 ), so that only the second opening 44 protrudes from the front side 3 of the insulating material housing 2. Subsequently, the first actuating element 41 is in an intermediate position between the first position and the second position.

[0058] The second actuating element 42 moves here with the first actuating element 41. In order to make the movement of the first actuating element 41 have no effect on the switch member 20, the drive rod by which the first actuating element 41 is mechanically coupled to the drive lever 22 is guided in a long hole on the first actuating element 41, which enables the first actuating element 41 to move freely from the second position to the first position.

[0059] Fig.11The locking method for the electronic switch type low-voltage protection switch device 1 in the switched-on state is shown. For this purpose, the annular lock 45 is used again, and its clamp 44 is now guided through the second opening 44. In this way, it is ensured that the second actuating element 42 cannot be moved to the third position of the actuating synchronizing element 21. Therefore, an unintentional or impermissible shutdown of the electronic switch type low-voltage protection switch device 1 is effectively prevented.

[0060] Reference numerals list:

[0061] 1 Low voltage protection switch device

[0062] 2 Insulating material housing

[0063] 3 Front

[0064] 4 Fastening side

[0065] 5 Actuating element

[0066] 6 Switch components

[0067] 7 Switch contacts

[0068] 8 Fixed contact elements

[0069] 9 Moving contact element

[0070] 10 Switch mechanism

[0071] 11 Housing

[0072] 16 Rivets

[0073] 17. Fixture

[0074] 20 Switch component

[0075] 21 Synchronous parts

[0076] 22 Actuating lever

[0077] 23 Drive rod

[0078] 24 Trigger lever

[0079] 25 Clamp

[0080] 26 Chute

[0081] 27 lever

[0082] 28 Clamp

[0083] 29 Return spring

[0084] 30 Switch shaft

[0085] 32 Contact spring

[0086] 40 Buttons

[0087] 41 First actuating element

[0088] 42 second actuating element

[0089] 43 First Opening

[0090] 44 Second Opening

[0091] 45 Ring Lock

[0092] 46 Clamp

[0093] 50 Electronic trigger unit

Claims

1. A switch mechanism (10) for an electronic switch type low voltage protection switch device (1), the switch mechanism comprising: - a housing (11); - a switch member (20) received and held in the housing (11); - a switch shaft (30) rotatably arranged in the housing (11), the switch shaft being mechanically coupled to the switch member (20); at least one movable contact element (9), which is fastened to the switch shaft (30) and can be moved between an on position and an off position by means of the switch shaft; - an electronic trigger unit (50) coupled to the switch member (20) such that the movement of the moving contact element (9) from the on position to the off position can be caused by triggering the electronic trigger unit (50); a manually actuatable first actuating element (41), which is mechanically coupled to the switch member (20) and can be linearly moved in a first direction from a first position to a second position in order to manually switch on the protection switch device (1); and A second manually actuatable actuating element (42) which is mechanically coupled to the switching member (20) and can be linearly moved into a third position in order to manually switch off the protective switch device (1).

2. The switch mechanism (10) according to claim 1, The second actuating element (42) moves with the first actuating element (41) when the first actuating element (41) moves to the second position, and can be moved to the third position independently of the first actuating element (41) to manually shut down the protective switch device (1).

3. The switch mechanism (10) according to one of the preceding claims, The switch member (20) comprises a trigger lever (24) movably supported in the housing (11), the trigger lever being mechanically operatively connected to the first actuating element (41), wherein a first end of the trigger lever (24) is mechanically coupled to the switch shaft (30), and a second end of the trigger lever is capable of locking with a latch (27) movably supported in the housing (11).

4. The switch mechanism (10) according to claim 3, The switch member (20) has a rotatably supported drive lever (22), and the trigger lever (24) is mechanically operatively connected to the first actuating element (41) via the drive lever.

5. The switch mechanism (10) according to claim 3 or 4, The electronic trigger unit (50) is designed to mechanically act on the latch (27) to release the lock of the trigger lever (24), so as to achieve the movement of the moving contact element (9) from its on position to its off position.

6. Switch mechanism (10) according to one of the preceding claims, wherein the first actuating element (41) is mechanically lockable in the first position.

7. A switching mechanism (10) according to one of the preceding claims, wherein the first actuating element (41) has a free-running slot, which can achieve an intermediate position between the first position and the second position, and in the intermediate position, the first actuating element (41) can be mechanically locked when the protective switch device (1) is in the switched-on state.

8. An electronically switchable low-voltage protection switch device (1), comprising a housing (2) made of insulating material, in which a switching mechanism according to any one of claims 1 to 7 is accommodated and fixed.

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