Tripping mechanism and switch equipment
By designing a tripping mechanism with an energy storage capacitor and a voltage comparison circuit in the switching equipment, combined with a timing circuit and a light-emitting element, the diagnosis of electromagnetic coil open circuit is simplified, the problem of electromagnetic coil open circuit detection is solved, and low-cost, high-efficiency open circuit diagnosis and maintenance are achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SCHNEIDER ELECTRIC IND SAS
- Filing Date
- 2025-05-28
- Publication Date
- 2026-05-05
AI Technical Summary
Electromagnetic coils in switching equipment are prone to wire breakage due to external vibration or high temperature. Existing technologies are difficult to effectively detect and diagnose wire breakage, resulting in difficult and costly maintenance.
A tripping mechanism was designed to detect the voltage of the electromagnetic coil by using an energy storage capacitor and a voltage comparison circuit. Combined with a timing circuit and a light-emitting element, the circuit structure was simplified to diagnose whether the electromagnetic coil was broken. The open circuit status was determined by using voltage and time information.
This enables simple and low-cost diagnosis of electromagnetic coil breakage after the energy storage capacitor is charged, improving maintenance efficiency and user experience while reducing diagnostic complexity and cost.
Smart Images
Figure CN224204076U_ABST
Abstract
Description
Technical Field
[0001] This disclosure relates to the field of switching devices, and more specifically, to a tripping mechanism and a switching device. Background Technology
[0002] Electromagnetic tripping mechanisms are widely used in switching equipment. The electromagnetic coil is a key component of the electromagnetic tripping mechanism, used to convert electrical energy into magnetic energy. When a short circuit occurs in the circuit coupled to the switching equipment, the electromagnetic coil is energized and generates a magnetic field. This magnetic field exerts a magnetic force on the moving magnet, which then moves and triggers the tripping mechanism to trip, thereby quickly cutting off the circuit.
[0003] During the operation of switching equipment, the electromagnetic coil may experience a wire breakage fault due to being subjected to large external forces (such as vibration) or prolonged exposure to high temperatures. Utility Model Content
[0004] In a first aspect of this disclosure, a tripping mechanism is provided, comprising: a tripping energy supply circuit including: an electromagnetic coil having a first end and a second end; and an energy storage capacitor coupled to the first end of the electromagnetic coil; a first voltage comparison circuit coupled to the energy storage capacitor at the first end of the electromagnetic coil and configured to compare the voltage of the energy storage capacitor with a tripping energy threshold; a voltage detection circuit coupled to the second end of the electromagnetic coil and configured to detect the voltage at the second end of the electromagnetic coil; and a determination unit coupled to the first voltage comparison circuit and the voltage detection circuit and configured to determine whether the electromagnetic coil is disconnected based on the voltage at the second end of the electromagnetic coil when the voltage of the energy storage capacitor reaches the tripping energy threshold.
[0005] In some embodiments, the determining unit includes: a second voltage comparison circuit coupled to a first voltage comparison circuit and a voltage detection circuit, and configured to compare the voltage at the second end of the electromagnetic coil with a preset threshold voltage when the voltage of the energy storage capacitor reaches the energy threshold required for tripping, so as to output a first comparison signal indicating the comparison result of the voltage at the second end of the electromagnetic coil and the preset threshold voltage; a timing circuit coupled to the second voltage comparison circuit to time the duration of the first comparison signal indicating that the voltage at the second end of the electromagnetic coil is less than the preset threshold voltage; and a determining circuit coupled to the timing circuit, and configured to determine that the electromagnetic coil has broken when the duration reaches a preset duration.
[0006] In some embodiments, the first voltage comparison circuit includes a comparator comprising: a first input terminal coupled to an energy storage capacitor at a first end of an electromagnetic coil to receive the voltage of the energy storage capacitor; a second input terminal for receiving a tripping energy threshold; and an output terminal coupled to a determination unit to output a second comparison signal to the determination unit, the second comparison signal indicating the comparison result between the voltage of the energy storage capacitor and the tripping energy threshold.
[0007] In some embodiments, the voltage detection circuit includes: a voltage divider circuit coupled to the second end of the electromagnetic coil and having a coupling point; and a filter circuit coupled between the coupling point and the determining unit.
[0008] In some embodiments, the voltage divider circuit includes a first resistor and a second resistor connected in series. The first resistor is coupled to the second end of the electromagnetic coil, and the second resistor is grounded. The coupling point is located between the first resistor and the second resistor.
[0009] In some embodiments, the tripping mechanism further includes a clamping protection circuit coupled to the filter circuit.
[0010] In some embodiments, the tripping mechanism further includes a light-emitting element coupled to a determining unit, which controls the light-emitting element to emit light when the voltage of the energy storage capacitor reaches the energy threshold required for tripping and when it is determined that the electromagnetic coil is not disconnected.
[0011] In a second aspect of this disclosure, a switching device is provided, the switching device including a tripping mechanism according to a first aspect of this disclosure.
[0012] In embodiments according to this disclosure, the tripping mechanism can determine whether the electromagnetic coil is broken based on the voltage at the second terminal of the electromagnetic coil after the energy storage capacitor has been fully charged (the voltage of the energy storage capacitor reaches the energy threshold required for tripping). Therefore, the tripping mechanism can diagnose whether the electromagnetic coil is broken with a simple circuit structure, thus reducing costs.
[0013] It should be understood that the content described in this section is not intended to limit the key or essential features of the embodiments of this disclosure, nor is it intended to restrict the scope of this disclosure. Other features of this disclosure will become readily apparent from the following description. Attached Figure Description
[0014] The above and other features, advantages, and aspects of the embodiments of this disclosure will become more apparent from the accompanying drawings and the following detailed description. In the drawings, the same or similar reference numerals denote the same or similar elements, wherein:
[0015] Figure 1 A schematic circuit diagram of a tripping mechanism according to an embodiment of the present disclosure is shown;
[0016] Figure 2 A circuit block diagram of a tripping mechanism according to another embodiment of the present disclosure is shown;
[0017] Figure 3 A schematic circuit diagram of a tripping mechanism according to another embodiment of the present disclosure is shown; and
[0018] Figure 4 It shows Figure 2 The circuit block diagram of the defined unit. Detailed Implementation
[0019] Preferred embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While preferred embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present disclosure will be thorough and complete, and will fully convey the scope of the present disclosure to those skilled in the art.
[0020] The term "comprising" and its variations as used herein signify open inclusion, i.e., "including but not limited to". Unless otherwise stated, the term "or" means "and / or". The term "based on" means "at least partially based on". The terms "one example embodiment" and "one embodiment" mean "at least one example embodiment". The term "another embodiment" means "at least one additional embodiment". The terms "first", "second", etc., may refer to different or the same objects.
[0021] As described above, during the operation of switching equipment, the electromagnetic coil may experience a wire breakage fault due to being subjected to large external forces (such as vibration) or prolonged exposure to high temperatures.
[0022] Embodiments of this disclosure provide a tripping mechanism capable of detecting whether an electromagnetic coil is broken, so that maintenance personnel can perform timely maintenance on the switching equipment. In the following sections, [further details will be provided]. Figures 1 to 4 The principles of this disclosure are described.
[0023] Figure 1 A schematic circuit diagram of a tripping mechanism according to an embodiment of the present disclosure is shown. Figure 1 As shown, the tripping mechanism described herein generally includes a tripping energy supply circuit 10, a voltage detection circuit 30, and an indicator circuit 70.
[0024] In some embodiments, such as Figure 1 As shown, the tripping energy supply circuit 10 includes an electromagnetic coil 11 and an energy storage capacitor 12. The electromagnetic coil 11 includes a first terminal and a second terminal. The energy storage capacitor 12 is coupled to the first terminal of the electromagnetic coil 11 and is used to supply power to the electromagnetic coil 11.
[0025] In some embodiments, such as Figure 1 As shown, the voltage detection circuit 30 is coupled to the second end of the electromagnetic coil 11. The voltage detection circuit 30 may include a voltage divider circuit 31, a filter circuit 32, and an energy storage capacitor 317.
[0026] In some embodiments, such as Figure 1As shown, the first terminal of the voltage divider circuit 31 is coupled to the second terminal of the electromagnetic coil 11, and the second terminal of the voltage divider circuit 31 is grounded. The voltage divider circuit 31 includes a plurality of resistors connected in series, the number of which is set according to design requirements. In some embodiments, the voltage divider circuit 31 includes resistors 313, 314, 315, and 316 connected in series. Resistor 313 is coupled to the second terminal of the electromagnetic coil 11, and resistor 316 is grounded.
[0027] In some embodiments, such as Figure 1 As shown, the first terminal of the energy storage capacitor 317 is coupled between resistors 313 and 314, and the second terminal of the energy storage capacitor 317 is grounded. When the electromagnetic coil 11 is in an unbroken state, the energy storage capacitor 317 is charged.
[0028] In some embodiments, such as Figure 1 As shown, the first end of the filter circuit 32 is coupled to the coupling point 356 of the voltage divider circuit 31, and the second end of the filter circuit 32 is coupled to the determining unit 40. The coupling point 356 is located between resistors 315 and 316.
[0029] In some embodiments, such as Figure 1 As shown, the indicator circuit 70 includes a light-emitting element 71 and a switching device 72 connected in series. The light-emitting element 71 is, for example, a light-emitting diode (LED), and the switching device 72 can be, for example, but is not limited to, a MOS switch. A first terminal of the light-emitting element 71 is coupled to a coupling point 345 of the voltage divider circuit 31, and a second terminal of the light-emitting element 71 is coupled to a first terminal 721 of the switching device 72. The coupling point 345 is located between resistors 314 and 315. The switching device 72 includes a first terminal 721, a second terminal 722, and a control terminal 723. The second terminal 722 is grounded. The control terminal 723 is coupled to a determining unit 40. The determining unit 40 sends a control signal to the control terminal 723, causing the first terminal 721 and the second terminal 722 to be either connected or disconnected.
[0030] In some embodiments, such as Figure 1 As shown, the indicator circuit 70 also includes a diode 73. The first end of the diode 73 is coupled to a coupling point 712, which is located between the light-emitting element 71 and the switching device 72. The second end of the diode 73 is coupled to a coupling point 356. When the switching device 72 is off, the light-emitting element 71 does not emit light, the voltage at coupling point 712 is higher than the voltage at coupling point 356, and the diode 73 is not conducting. When the switching device 72 is on, the light-emitting element 71 emits light, the voltage at coupling point 712 is lower than the voltage at coupling point 356, the diode 73 conducts, and the voltage at coupling point 356 is pulled low.
[0031] The following is for reference. Figure 1 The process of detecting whether the electromagnetic coil 11 is broken is described in some embodiments of the present disclosure.
[0032] The determining unit 40 sends alternating high-level and low-level control signals to the control terminal 723 of the switching device 72, causing the switching device 72 to alternately turn on or off. When the switching device 72 is on, the light-emitting element 71 emits light, and the filter circuit 32 outputs a low-voltage signal. When the switching device 72 is off, the light-emitting element 71 does not emit light, and the filter circuit 32 outputs a high-voltage signal. Thus, the user can visually observe whether the light-emitting element 71 is flickering to determine whether the electromagnetic coil 11 is disconnected, and the determining unit 40 can determine whether the electromagnetic coil 11 is in a disconnected state and whether the light-emitting element 71 is flickering by receiving alternating high-voltage and low-voltage signals from the filter circuit 32.
[0033] It is understandable that when the electromagnetic coil 11 experiences a wire breakage fault, the light-emitting element 71 will not flash, and the determining unit 40 will not receive alternating high-level and low-level signals.
[0034] The aforementioned tripping mechanism uses a relatively complex circuit structure to diagnose whether the electromagnetic coil is broken, and the cost is also relatively high.
[0035] To simplify the structure of the tripping mechanism and the diagnostic process for whether the electromagnetic coil is broken, thereby reducing costs. Figure 2 A circuit block diagram of a tripping mechanism according to another embodiment of the present disclosure is shown. Figure 3 A schematic circuit diagram of the tripping mechanism is shown. Figure 4 A circuit block diagram of the determining unit 40 is shown.
[0036] In some embodiments, see Figure 2 and Figure 3 The tripping mechanism includes a tripping energy supply circuit 10, a first voltage comparison circuit 20, a voltage detection circuit 30, and a determination unit 40.
[0037] In some embodiments, the tripping energy supply circuit 10 includes an electromagnetic coil 11 and an energy storage capacitor 12. The electromagnetic coil 11 includes a first end and a second end. The first end of the energy storage capacitor 12 is coupled to the first end of the electromagnetic coil 11, and the second end of the energy storage capacitor 12 is grounded. During tripping, the energy storage capacitor 12 supplies power to the electromagnetic coil 11, and the magnetic field force generated by the electromagnetic coil 11 causes the tripping mechanism to trip.
[0038] In some embodiments, the first voltage comparison circuit 20 is coupled to the energy storage capacitor 12 at the first end of the electromagnetic coil 11, and is used to detect the voltage of the energy storage capacitor 12 and compare the voltage of the energy storage capacitor 12 with the energy threshold required for tripping.
[0039] In some embodiments, the voltage detection circuit 30 is coupled to the second end of the electromagnetic coil 11 to detect the voltage at the second end of the electromagnetic coil 11.
[0040] In some embodiments, the determining unit 40 is coupled to the first voltage comparison circuit 20 and the voltage detection circuit 30. The determining unit 40 is configured to determine whether the electromagnetic coil 11 is disconnected based on the voltage at the second end of the electromagnetic coil 11 when the voltage of the energy storage capacitor 12 reaches the energy threshold required for tripping.
[0041] In some embodiments, when determining whether the electromagnetic coil 11 is disconnected, the tripping mechanism first compares the voltage of the energy storage capacitor 12 with the tripping energy threshold using the first voltage comparison circuit 20. If the voltage of the energy storage capacitor 12 does not reach the tripping energy threshold, it means that the energy storage capacitor 12 has not completed charging, and the voltage detected by the voltage detection circuit 30 is not judged at this time. When the voltage of the energy storage capacitor 12 reaches the tripping energy threshold, it means that the energy storage capacitor 12 has completed charging, and the determining unit 40 can diagnose whether the electromagnetic coil 11 is disconnected based on the voltage detected by the voltage detection circuit 30. When the voltage detected by the voltage detection circuit 30 reaches a preset threshold voltage, it can be determined that the electromagnetic coil 11 is not disconnected. It can be understood that if the electromagnetic coil 11 is disconnected, the voltage collected by the voltage detection circuit 30 will be zero or close to zero and lower than the threshold voltage, thus determining that the electromagnetic coil 11 has experienced a disconnection fault.
[0042] When the energy storage capacitor 12 has finished charging, the tripping mechanism compares the voltage at the second terminal of the electromagnetic coil with a preset threshold voltage to determine whether the electromagnetic coil 11 is open-circuited. This tripping mechanism uses a simple circuit structure to diagnose whether the electromagnetic coil is open-circuited, simplifying the diagnostic process and thus reducing costs.
[0043] See Figure 4 In some embodiments, the determining unit 40 includes a second voltage comparison circuit 41, a timing circuit 42, and a determining circuit 43. The second voltage comparison circuit 41 is coupled to the first voltage comparison circuit 20 and the voltage detection circuit 30, and is used to compare the voltage at the second terminal of the electromagnetic coil 11 with a preset threshold voltage when the voltage of the energy storage capacitor 12 reaches the energy threshold required for tripping, so as to output a first comparison signal indicating the comparison result between the voltage at the second terminal of the electromagnetic coil 11 and the preset threshold voltage. The preset threshold voltage corresponds to the voltage at the second terminal of the electromagnetic coil 11 when the electromagnetic coil 11 is in an unbroken state.
[0044] The timing circuit 42 is coupled to the second voltage comparison circuit 41 and times the duration of a first comparison signal indicating that the voltage at the second end of the electromagnetic coil 11 is less than a preset threshold voltage. The determining circuit 43 is coupled to the timing circuit 42 and is used to determine that the electromagnetic coil 11 has broken wire when the duration reaches a preset time. That is, when the voltage at the second end of the electromagnetic coil 11 is less than the preset threshold voltage, and the duration for which the voltage at the second end of the electromagnetic coil 11 is less than the preset threshold voltage reaches the preset time, the determining unit 40 can determine that the electromagnetic coil 11 has broken wire. By comprehensively considering whether the voltage at the second end of the electromagnetic coil 11 is less than the preset threshold voltage and the duration for which the voltage at the second end of the electromagnetic coil 11 is less than the preset threshold voltage, misjudgment can be effectively avoided.
[0045] In some embodiments, the determining unit 40 is also coupled to the light-emitting element 50. The determining unit 40 controls the light-emitting element 50 to emit light, for example, by controlling the light-emitting element 50 to flash, when the voltage of the energy storage capacitor 12 reaches the energy threshold required for tripping and the electromagnetic coil 11 is determined to be not disconnected. When the determining unit 40 determines that the electromagnetic coil 11 has experienced a disconnection fault, it controls the light-emitting element 50 to not emit light. In some embodiments, when the voltage of the energy storage capacitor 12 has not reached the energy threshold required for tripping, the determining unit 40 still controls the light-emitting element 50 to not emit light, even if it has not yet determined whether the electromagnetic coil 11 is disconnected. Therefore, the user can determine whether the electromagnetic coil 11 is in a disconnected state and whether the energy storage capacitor 12 has completed charging by observing the illumination state of the light-emitting element 50, thereby improving the user experience.
[0046] In some embodiments, the first voltage comparison circuit 20 includes a comparator 21, which includes a first input terminal 211, a second input terminal 212, and an output terminal 213. The first input terminal 211 is coupled to the energy storage capacitor 12 at the first end of the electromagnetic coil 11 to receive the voltage of the energy storage capacitor 12. The second input terminal 212 is used to receive the tripping energy threshold. The output terminal 213 is coupled to the determination unit 40 to output a second comparison signal to the determination unit 40. The second comparison signal indicates the comparison result between the capacitance of the energy storage capacitor 12 and the tripping energy threshold. The comparator 21 compares the voltage of the energy storage capacitor 12 with the tripping energy threshold to output a second comparison signal indicating the comparison result of the voltage of the energy storage capacitor 12 and the tripping energy threshold through the output terminal 213. As can be seen from the above, when the second comparison signal indicates that the voltage of the energy storage capacitor 12 reaches the tripping energy threshold, the determination unit 40 compares the voltage detected by the voltage detection circuit 30 with a preset threshold voltage to diagnose whether the electromagnetic coil 11 is disconnected.
[0047] In some embodiments, the voltage detection circuit 30 may include a voltage divider circuit 31 and a filter circuit 32. The voltage divider circuit 31 is coupled to the second end of the electromagnetic coil 11 and has a coupling point 313. The filter circuit 32 is coupled between the coupling point 313 and the determination unit 40. The voltage divider circuit 31 is used to convert the high voltage at the second end of the electromagnetic coil 11 into a low voltage suitable for input to the determination unit 40. The filter circuit 32 is used to improve the quality of the detected voltage signal.
[0048] In some embodiments, the voltage divider circuit 31 includes a first resistor 311 and a second resistor 312 connected in series. The first resistor 311 is coupled to the second end of the electromagnetic coil 11, and the second resistor 312 is grounded. The coupling point 313 is located between the first resistor 311 and the second resistor 312. The filter circuit 32 includes a resistor 321 and a capacitor 322. The resistor 321 is connected in series between the coupling point 313 and the determination unit 40. The first end of the capacitor 322 is coupled between the resistor 321 and the determination unit 40, and the second end of the capacitor 322 is grounded. The filter circuit 32 sends the detected voltage at the coupling point 313 to the ADC in the determination unit 40 so that the determination unit 40 can compare the voltage at the coupling point 313 with a preset voltage threshold and determine whether the electromagnetic coil 11 is disconnected based on the comparison result. It can be understood that the preset voltage threshold corresponds to the voltage at the coupling point 313 when the electromagnetic coil 11 is in an undisconnected state. The comparison result of the voltage at the coupling point 313 with the preset voltage threshold corresponds to the comparison result of the voltage at the second end of the electromagnetic coil 11 and the preset threshold voltage. Accordingly, the first comparison signal indicates the comparison result between the voltage at coupling point 313 and a preset voltage threshold.
[0049] It is understood that in some alternative embodiments, the first voltage comparison circuit 20, the voltage detection circuit 30, the voltage divider circuit 31, and the filter circuit 32 may have other implementations and are not limited to the examples described above.
[0050] In some embodiments, the tripping mechanism further includes a clamping protection circuit 60, one end of which is coupled to a filter circuit 32. The clamping protection circuit 60 is used to limit the voltage transmitted from the filter circuit 32 to the determining unit 40 within a safe range, thereby improving the reliability and stability of the tripping mechanism.
[0051] Embodiments of this disclosure also provide a switching device including the tripping mechanism described above.
[0052] The various embodiments of this disclosure have been described above. These descriptions are exemplary and not exhaustive, and are not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or technical improvements to the embodiments in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.
Claims
1. A tripping mechanism, characterized in that, include: Trip-out power supply circuit (10), including: An electromagnetic coil (11) includes a first end and a second end; and The energy storage capacitor (12) is coupled to the first end of the electromagnetic coil (11); A first voltage comparison circuit (20) is coupled to the energy storage capacitor (12) at the first end of the electromagnetic coil (11) and is used to compare the voltage of the energy storage capacitor (12) with the energy threshold required for tripping. A voltage detection circuit (30) is coupled to the second end of the electromagnetic coil (11) and is used to detect the voltage at the second end of the electromagnetic coil (11); and The determining unit (40) is coupled to the first voltage comparison circuit (20) and the voltage detection circuit (30), and is used to determine whether the electromagnetic coil (11) is disconnected based on the voltage at the second end of the electromagnetic coil (11) when the voltage of the energy storage capacitor (12) reaches the tripping energy threshold.
2. The tripping mechanism according to claim 1, characterized in that, The determining unit (40) includes: The second voltage comparison circuit (41) is coupled to the first voltage comparison circuit (20) and the voltage detection circuit (30), and is used to compare the voltage at the second end of the electromagnetic coil (11) with the preset threshold voltage when the voltage of the energy storage capacitor (12) reaches the tripping energy threshold, so as to output a first comparison signal indicating the comparison result of the voltage at the second end of the electromagnetic coil (11) and the preset threshold voltage. A timing circuit (42) coupled to the second voltage comparison circuit (41) to time the duration of a first comparison signal indicating that the voltage at the second terminal of the electromagnetic coil (11) is less than the preset threshold voltage; and A determining circuit (43) is coupled to the timing circuit (42) and is used to determine that the electromagnetic coil (11) has broken when the duration reaches a preset duration.
3. The tripping mechanism according to claim 1 or 2, characterized in that, The first voltage comparison circuit (20) includes a comparator (21), the comparator (21) comprising: A first input terminal (211) is coupled to the energy storage capacitor (12) at the first end of the electromagnetic coil (11) to receive the voltage of the energy storage capacitor (12); and The second input terminal (212) is used to receive the energy threshold required for the tripping; and The output terminal (213) is coupled to the determining unit (40) to output a second comparison signal to the determining unit (40), the second comparison signal indicating the comparison result of the voltage of the energy storage capacitor (12) and the energy threshold required for the trip.
4. The tripping mechanism according to claim 1 or 2, characterized in that, The voltage detection circuit (30) includes: A voltage divider circuit (31) is coupled to the second end of the electromagnetic coil (11) and has a coupling point (313); and The filter circuit (32) is coupled between the coupling point (313) and the determining unit (40).
5. The tripping mechanism according to claim 4, characterized in that, The voltage divider circuit (31) includes a first resistor (311) and a second resistor (312) connected in series. The first resistor (311) is coupled to the second end of the electromagnetic coil (11), and the second resistor (312) is grounded. The coupling point (313) is located between the first resistor (311) and the second resistor (312).
6. The tripping mechanism according to claim 4, characterized in that, It also includes a clamping protection circuit (60) coupled to the filter circuit (32).
7. The tripping mechanism according to claim 1 or 2, characterized in that, It also includes a light-emitting element (50), which is coupled to the determining unit (40). The determining unit (40) is used to control the light-emitting element (50) to emit light when the voltage of the energy storage capacitor (12) reaches the energy threshold required for the trip and when it is determined that the electromagnetic coil (11) is not disconnected.
8. A switching device, characterized in that, Includes the tripping mechanism according to any one of claims 1 to 7.