Electrical leakage protection apparatus and electrical device

Abstract

The present application relates to an electrical leakage protection apparatus. The electrical leakage protection apparatus comprises an electrical leakage detection module and a circuit breaker module, and is characterized in that the circuit breaker module comprises a first coil mechanism used for short-circuit protection and a second coil mechanism used for electrical leakage protection, and the electrical leakage detection module is connected to the second coil mechanism via a first electrical transmission line. In addition, the present application relates to an electrical device, comprising a first power supply line from a power supply, a second power supply line leading to a load, and the electrical leakage protection apparatus of the present application.

Description

Leakage protection devices and electrical equipment Technical Field

[0001] The present application generally relates to the field of leakage protection, and more specifically, to a leakage protection device and an electrical device, wherein the electrical device includes the leakage protection device. Background Art

[0002] When insulation damage occurs in electrical circuits or equipment, human contact with these damaged areas can cause a short circuit to the ground, known as leakage, posing a threat to personal safety. Leakage or ground shorts can also be caused by energy released from high temperatures or arcing in electrical circuits or equipment. If not promptly eliminated, this can cause an electrical fire.

[0003] A leakage current protection device (RCP), also known as a ground fault circuit interrupter (GFCI), is a critical protective device designed to prevent electric shock or electrical fires when a leakage current or ground short occurs in an electrical circuit or device. When a leakage current or ground short occurs in an electrical circuit or device, abnormal current or voltage signals will appear in the circuit. The RCP detects and processes these abnormal current or voltage signals, triggering the actuator to operate, thereby eliminating potential hazards. Generally speaking, RCPs detect leakage current in the circuit and trigger the circuit breaker to trip, thereby shutting down the circuit.

[0004] Patent document CN104851759A discloses a leakage protection device, which includes a sensor module and a circuit breaker module. The sensor module includes a leakage tripping coil, a time-delay iron core, and a tripping mechanism. The tripping rod of the tripping mechanism needs to extend from the sensor module into the interior of the circuit breaker module to trip the circuit breaker. However, such a leakage protection device has many parts and is relatively expensive. In addition, the tripping mechanical transmission mechanism between different modules, such as multiple connecting rod transmissions, makes the structure within the device relatively complex. Therefore, it may be desirable to provide a leakage protection device with a simplified structure and / or favorable cost. In addition, it may also be desirable to further improve or expand the functions of the leakage protection device.

[0005] Summary of the Invention

[0006] Therefore, the object of the present application is to provide a leakage protection device and an electrical device that can overcome at least one defect in the prior art.

[0007] According to a first aspect of the present application, a leakage protection device is provided, comprising a leakage detection module and a circuit breaker module, characterized in that the circuit breaker module comprises a first coil mechanism for short-circuit protection and a second coil mechanism for leakage protection, wherein the leakage detection module is connected to the second coil mechanism via a first electrical transmission line.

[0008] In some embodiments, the leakage protection device includes an intermediate housing arranged between the circuit breaker module and the leakage detection module, and the leakage detection module and the circuit breaker module are separated from each other by the intermediate housing.

[0009] In some embodiments, the intermediate housing is provided with a through hole, and the first electrical transmission line is guided from the leakage detection module to the circuit breaker module via the through hole.

[0010] In some embodiments, there is no tripping mechanical transmission mechanism between the circuit breaker module and the leakage detection module.

[0011] In some embodiments, no coil mechanism for leakage protection is provided in the leakage detection module.

[0012] In some embodiments, the first coil mechanism is coaxially arranged with the second coil mechanism.

[0013] In some embodiments, the first coil mechanism and the second coil mechanism are coaxially mounted on an iron core.

[0014] In some embodiments, the first coil mechanism includes a first coil sleeve and a first coil wound on the first coil sleeve, and the second coil mechanism includes a second coil sleeve and a second coil wound on the second coil sleeve, wherein the first coil sleeve and the second coil sleeve are coaxially sleeved on an iron core.

[0015] In some embodiments, the first coil sleeve and the second coil sleeve are configured as I-shaped sleeves.

[0016] In some embodiments, the first coil sleeve and the second coil sleeve are in abutment with each other.

[0017] In some embodiments, the first coil mechanism and the second coil mechanism include a coil sleeve and a first coil and a second coil wound around the coil sleeve.

[0018] In some embodiments, the first coil mechanism includes a first coil wound on an iron core, and the second coil mechanism includes a second coil wound on the iron core.

[0019] In some embodiments, the first coil mechanism includes a first coil wound on an iron core, and the second coil mechanism includes a coil sleeve and a second coil wound on the coil sleeve.

[0020] In some embodiments, the leakage detection module includes a leakage detector and a circuit board, wherein the circuit board is connected to the second coil mechanism via a first electrical transmission line, and the leakage detector is connected to the circuit board via a second electrical transmission line.

[0021] In some embodiments, the leakage detection module further includes a simulated leakage operation unit, which is configured to establish a leakage circuit when the simulated leakage operation unit is operated, thereby simulating the occurrence of a leakage fault, wherein the leakage circuit passes through the leakage detector, the simulated leakage operation unit and the circuit board.

[0022] In some embodiments, the leakage detection module further includes a communication module configured to receive a remote control signal, and the circuit board controls the second coil mechanism via the first electrical transmission line in response to the control signal.

[0023] In some embodiments, the circuit breaker module further comprises: an armature, a transmission mechanism, and a contact assembly, wherein the contact assembly comprises a movable contact and a stationary contact, wherein the armature, the transmission mechanism, and the contact assembly are mechanically connected to each other.

[0024] In some embodiments, the first coil mechanism is configured to trigger movement of the armature and thereby drive movement of the contact assembly via the transmission mechanism when a short circuit fault occurs in the main circuit, so as to shut off the main circuit.

[0025] In some embodiments, the second coil mechanism is configured to trigger the movement of the armature in the event of a leakage fault, thereby driving the movement of the contact assembly via the transmission mechanism, so as to shut off the main circuit.

[0026] In some embodiments, the transmission mechanism includes: a lock, a trip latch, and a moving contact bracket, wherein the lock and the trip latch are unlockably connected to each other, the trip latch and the moving contact bracket are rotatably connected to each other, and the moving contact bracket and the moving contact are rotatably connected to each other.

[0027] In some embodiments, in normal operating mode, the lock catch and the trip catch cooperate and lock with each other, and the trip catch and the moving contact bracket cooperate and lock with each other, so that the transmission mechanism forms a four-bar linkage mechanism, thereby engaging the moving contact with the static contact.

[0028] In some embodiments, under a short circuit fault or a leakage fault, the armature drives the lock catch and the jump catch to unlock, so that the transmission mechanism is transformed into a five-bar linkage mechanism, and then the moving contact bracket drives the moving contact and the static contact to disconnect.

[0029] In some embodiments, the circuit breaker module further includes a handle, wherein the handle and the trip button are rotatably connected to each other.

[0030] In some embodiments, the circuit breaker module further includes an overload detection device, which is configured to detect an overload fault in the main circuit and directly move the lock to unlock the lock and the trip button when the overload fault is detected.

[0031] In some embodiments, the overload detection device is configured as a bimetallic device, and generates heat and deforms when an overload fault occurs in the main circuit, thereby pushing the lock.

[0032] In some embodiments, the circuit breaker module includes an emergency switch and an emergency switch transmission line, and the emergency switch is electrically connected to the second coil mechanism via the emergency switch transmission line.

[0033] In some embodiments, the circuit breaker module includes a remote control transmission line electrically connected to the second coil mechanism.

[0034] According to a second aspect of the present application, an electrical device, such as a charging device or a charging station, is provided, characterized in that the electrical device includes a first power supply line from a power source, a second power supply line to a load, and a leakage protection device according to some embodiments of the present application, wherein the first power supply line is connected to the input terminal of the leakage protection device and the second power supply line is connected to the output terminal of the leakage protection device. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The present application will be described in more detail below with reference to the accompanying drawings and specific embodiments. The schematic drawings are briefly described as follows:

[0036] FIG1 shows a perspective view of a leakage protection device according to some embodiments of the present application;

[0037] FIG2 shows an exemplary internal arrangement view of a circuit breaker module of a leakage protection device according to some embodiments of the present application;

[0038] FIG3 shows an exemplary internal arrangement view of a leakage detection module of a leakage protection device according to some embodiments of the present application;

[0039] FIG4 shows an internal arrangement view of a leakage protection device according to some embodiments of the present application, wherein the housing structure is omitted;

[0040] FIG5 shows a front view of the internal arrangement view of FIG4;

[0041] FIG6 shows a schematic state diagram of the circuit breaker module in normal operating mode;

[0042] FIG7 shows a schematic state diagram of a circuit breaker module in an abnormal operation mode. DETAILED DESCRIPTION

[0043] The present application will be described below with reference to the accompanying drawings, which illustrate several embodiments of the present application. However, it should be understood that the present application can be presented in many different ways and is not limited to the embodiments described below; in fact, the embodiments described below are intended to make the disclosure of the present application more complete and fully illustrate the scope of protection of the present application to those skilled in the art. It should also be understood that the embodiments disclosed herein can be combined in various ways to provide many additional embodiments.

[0044] It should be understood that the terms used herein are only used to describe specific embodiments and are not intended to limit the scope of this application. All terms (including technical and scientific terms) used herein have the meanings commonly understood by those skilled in the art unless otherwise defined. For the sake of simplicity and / or clarity, well-known functions or structures may not be described in detail.

[0045] As used herein, spatially relative terms such as "upper," "lower," "left," "right," "front," "back," "higher," and "lower" may describe the relationship of one feature to another feature in the accompanying drawings. It should be understood that these spatially relative terms encompass different orientations of the device in use or operation, in addition to the orientation shown in the accompanying drawings. For example, if the device in the accompanying drawings is turned over, a feature previously described as "below" another feature may now be described as "above" the other feature. The device may also be otherwise oriented (rotated 90 degrees or in other orientations), and the relative spatial relationships will be interpreted accordingly.

[0046] Herein, the term "A or B" includes "A and B" and "A or B" rather than exclusively including "A" or only "B" unless specifically stated otherwise.

[0047] As used herein, the terms "illustrative" or "exemplary" mean "serving as an example, instance, or illustration," rather than as a "model" to be precisely copied. Any implementation described as an example is not necessarily to be construed as preferred or advantageous over other implementations. Furthermore, this application is not to be bound by any expressed or implied theory presented in the foregoing technical field, background, summary, or detailed description.

[0048] As used herein, the term "substantially" is intended to include any minor variations due to design or manufacturing imperfections, device or component tolerances, environmental influences, and / or other factors.

[0049] In this document, the term "partially" may refer to any proportion, for example, greater than 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, or even 100%, i.e., all.

[0050] Additionally, terms such as "first," "second," and the like may also be used herein for reference purposes only and are not intended to be limiting. For example, the terms "first," "second," and other numerical terms referring to structures or elements do not imply a sequence or order unless the context clearly indicates otherwise.

[0051] Some embodiments of the present application will now be described in more detail with reference to the accompanying drawings.

[0052] Referring to FIG1 , a perspective view of a leakage protection device 100 according to some embodiments of the present application is shown. As shown in FIG1 , the leakage protection device 100 may include a leakage detection module 10 and a circuit breaker module 20. The leakage detection module 10 may be configured to detect or identify a leakage fault event or a short-to-ground fault event. The circuit breaker module 20 may be configured to disconnect the main circuit, i.e., trip the circuit breaker, if the leakage detection module 10 detects a leakage fault.

[0053] The leakage protection device 100 according to some embodiments of the present application can be applied to an electrical device, such as a charging device or a charging station. The electrical device may include a first power supply line from a power source, a second power supply line to a load, and the leakage protection device according to some embodiments of the present application, wherein the first power supply line is connected to the input terminal of the leakage protection device and the second power supply line is connected to the output terminal of the leakage protection device.

[0054] Additionally or alternatively, the circuit breaker module 20 may be configured to detect or identify a short circuit fault in the main circuit (eg, a short circuit between the neutral wire and the live wire), and perform a circuit breaker operation, ie, trip, on the main circuit when a short circuit fault is detected.

[0055] Additionally or alternatively, the circuit breaker module 20 may be configured to detect or identify an overload fault of the main circuit, and perform a circuit breaker operation, ie, trip, on the main circuit when the overload fault is detected.

[0056] Advantageously, the leakage protection device 100 can be assembled in a modular manner. That is, the leakage detection module 10 of the leakage protection device 100 can be constructed as a relatively independent module and can be manufactured independently of the circuit breaker module 20. The leakage detection module 10 can have its own housing and an independent accommodation space within the housing. Similarly, the circuit breaker module 20 of the leakage protection device 100 can also be constructed as a relatively independent module and can be manufactured independently of the leakage detection module 10. The circuit breaker module 20 can have its own housing and an independent accommodation space within the housing. This modular assembly method is advantageous because it allows different models of leakage detection modules 10 and circuit breaker modules 20 to be combined in an efficient manner to obtain different models of leakage protection devices 100.

[0057] Next, with reference to Figures 2-5, a detailed description of the leakage protection device 100 according to some embodiments of the present application is provided. Figure 2 shows an exemplary internal layout view of the circuit breaker module 20 of the leakage protection device 100 according to some embodiments of the present application. Figure 3 shows an exemplary internal layout view of the leakage detection module 10 of the leakage protection device 100 according to some embodiments of the present application. Figure 4 shows an internal layout view of the leakage protection device 100 according to some embodiments of the present application, in which the housing structure is omitted. Figure 5 shows a front view of the internal layout view of Figure 4.

[0058] As shown in Figures 2, 4 and 5, the circuit breaker module 20 may include a housing and various functional devices arranged in or on the housing. The circuit breaker module 20 may include a first coil mechanism 21 and a second coil mechanism 22 arranged separately from the first coil mechanism 21. The first coil mechanism 21 can be configured as a short-circuit protection coil mechanism and can also be called a "main coil mechanism", while the second coil mechanism 22 can be configured as a leakage protection coil mechanism and can also be called an "auxiliary coil mechanism". That is to say, not only a coil mechanism for short-circuit protection can be integrated in the circuit breaker module 20 of the present application, but also a coil mechanism for leakage protection can be integrated. This solution of integrating trip coil assemblies for multiple protection mechanisms in the circuit breaker module 20 can significantly simplify the structural design of the leakage protection device 100 and also effectively reduce manufacturing costs.

[0059] The circuit breaker module 20 may include an armature 24 that cooperates with the first coil mechanism 21 and the second coil mechanism 22, a transmission mechanism 25 that cooperates with the armature 24, and a contact assembly 26 that cooperates with the transmission mechanism 25. The main circuit can be disconnected and connected by disconnecting or engaging the movable contact 261 and the stationary contact 262 of the contact assembly 26. Advantageously, the first coil mechanism 21 and the second coil mechanism 22 can cooperate with a common armature 24, and thus with a common transmission mechanism 25 and contact assembly 26. This shared structural design between the first coil mechanism 21 and the second coil mechanism 22 significantly simplifies the internal layout of the circuit breaker module 20 and effectively reduces manufacturing costs.

[0060] Specifically, under the action of the first coil mechanism 21, for example, when a first voltage or a first current is applied to the first coil of the first coil mechanism 21, the first coil mechanism 21 can cause the armature 24 to move due to the electromagnetic effect, thereby driving the transmission mechanism 25 and the contact assembly 26 to move, thereby disconnecting or connecting the movable contact 261 and the stationary contact 262 of the contact assembly 26. Under the action of the second coil mechanism 22, for example, when a second voltage or a second current is applied to the second coil of the second coil mechanism 22, the second coil mechanism 22 can cause the armature 24 to move due to the electromagnetic effect, thereby driving the transmission mechanism 25 and the contact assembly 26 to move, thereby disconnecting or connecting the movable contact 261 and the stationary contact 262 of the contact assembly 26.

[0061] In some embodiments, the first coil mechanism 21 can be coaxially arranged with the second coil mechanism 22. For example, the first coil mechanism 21 and the second coil mechanism 22 can be coaxially sleeved on an iron core 23. The armature 24 that cooperates with the coil mechanism can be arranged on the upper side or the lower side of the iron core 23. As shown in Figure 2, the first coil mechanism 21 can include a first coil sleeve and a first coil wound on the first coil sleeve. The second coil mechanism 22 can include a second coil sleeve and a second coil wound on the second coil sleeve. The first coil sleeve and the second coil sleeve can be coaxially sleeved on the iron core 23. This achieves a compact arrangement of the coil assembly for short-circuit protection and leakage protection. Further advantageously, the first coil sleeve and the second coil sleeve can be configured as I-shaped sleeves, and the first coil sleeve and the second coil sleeve can be arranged on the iron core 23 with a distance between them or can be arranged close to each other on the iron core 23.

[0062] In other embodiments, it is also possible that the first coil arrangement 21 may include a first coil wound on the iron core 23 , and the second coil arrangement 22 may include a second coil wound on the iron core 23 .

[0063] In other embodiments, it is also possible that the first coil mechanism 21 includes a first coil wound on an iron core, and the second coil mechanism 22 includes a coil sleeve and a second coil wound on the coil sleeve, thereby allowing the second coil mechanism to be conveniently installed later.

[0064] In other embodiments, it is also possible that the first coil mechanism 21 and the second coil mechanism 22 can cooperate with their respective armatures 24. The corresponding coil mechanism can cause the corresponding armature 24 to move based on the electromagnetic effect, thereby driving the transmission mechanism 25 and the contact assembly 26 to operate, thereby disconnecting or connecting the movable contact 261 and the stationary contact 262 of the contact assembly 26.

[0065] In other embodiments, the first coil mechanism 21 and the second coil mechanism 22 may also include a coil sleeve and the first coil and the second coil wound on the coil sleeve, thereby further improving the compact arrangement of the coil assembly for short-circuit protection and leakage protection.

[0066] In some embodiments, the circuit breaker module 20 may further include an overload detection device 28, which may be configured to detect an overload fault in the main circuit. When the overload detection device 28 detects an overload fault, the overload detection device 28 may directly or indirectly via a corresponding mechanical mechanism drive the transmission mechanism 25 and the contact assembly 26 to operate, thereby shutting off the main circuit.

[0067] In some embodiments, the overload detection device 28 can be configured as a bimetallic device. The bimetallic device can heat up and deform when an overload fault occurs in the main circuit, for example, when the current exceeds a predetermined value, thereby driving the transmission mechanism 25 and the contact assembly 26 to operate, thereby shutting off the main circuit.

[0068] It should be understood that both short-circuit faults and overload faults may manifest as a significant increase in the current in the main circuit, for example, exceeding the rated current by several times. However, the leakage protection device 100 of the present application distinguishes between short-circuit faults and overload faults and adopts different corresponding measures. For short-circuit faults, the leakage protection device 100 of the present application achieves a rapid response by utilizing the electromagnetic effect-based response mechanism of the first coil mechanism 21 and the armature 24. This is because short-circuit faults are generally extremely dangerous and require an immediate response. For overload faults, the leakage protection device 100 of the present application achieves a relatively slow response by utilizing the thermal deformation response mechanism of the overload detection device 28. This is because overload faults are generally caused by excessive load, and a certain amount of redundant response time is generally allowed, otherwise repeated shutdowns may result in negative effects. To achieve this distinction, a current threshold can be specified. When the current in the main circuit is greater than or equal to the current threshold, it is judged as a short-circuit fault, while when the current in the main circuit is less than the current threshold, it is judged as an overload fault. To this end, the first coil mechanism 21 and the armature 24 can be set so that the driving operation of the armature 24, such as being attracted or pushed away, will be triggered only when a current greater than or equal to a current threshold is applied to the first coil of the first coil mechanism 21; otherwise, the armature 24 will not be driven by the first coil mechanism 21.

[0069] In some embodiments, the first coil of the first coil mechanism 21 can be connected in series with the main circuit, thereby allowing the current on the main circuit to flow directly through it, thereby achieving a fast and accurate response. The two ends of the first coil can be electrically connected to the movable contact 261 and the external terminal via, for example, a welded metal wire, such as a copper wire.

[0070] In some embodiments, the circuit breaker module 20 may further include a handle 27, which may be directly mechanically connected to the transmission mechanism 25 within the circuit breaker module 20 so as to manually trigger the contact assembly 26 to move, thereby disconnecting or engaging the moving contact 261 and the static contact 262 of the contact assembly 26.

[0071] Additionally or alternatively, the circuit breaker module 20 may include an emergency switch (not shown) and an emergency switch transmission line 29. The emergency switch may be electrically connected to the second coil of the second coil mechanism 22 via the emergency switch transmission line 29. After the emergency switch is operated, for example, pressed, the emergency circuit may be opened, and a predetermined voltage or current may be applied to the second coil of the second coil mechanism 22 to trigger the shutdown of the main circuit.

[0072] Additionally or alternatively, the circuit breaker module 20 may include a remote control transmission line (not shown) that can connect a remote control center, such as a control computer, to the second coil mechanism 22. When it is necessary to remotely trigger the shutdown of the main circuit, the remote control center can apply a predetermined voltage or current to the second coil via the remote control transmission line to trigger the shutdown of the main circuit.

[0073] As shown in Figures 3, 4 and 5, the leakage detection module 10 may include a housing and various functional components arranged in or on the housing. The leakage detection module 10 may include a leakage detector 13, and the leakage detector 13 may be configured as a leakage detection device in any form to detect leakage faults. When the main circuit is a DC circuit, the leakage detector 13 may be configured as a DC leakage detection device. When the main circuit is an AC circuit, the leakage detector 13 may be configured as an AC leakage detection device. In some embodiments, the leakage detector 13 may be configured as a mutual inductor, such as a zero-sequence mutual inductor. The live wire and the neutral wire may pass through the iron core 23 of the mutual inductor at the same time. When leakage occurs on the live wire and / or the neutral wire, the mutual inductor may detect the leakage current, thereby identifying the leakage fault.

[0074] Instead of a conventional mechanical tripping transmission mechanism between the different modules of a conventional leakage protection device 100, the leakage protection device 100 of the present application provides a jumper electrical connection, preferably only a jumper electrical connection, between the leakage detection module 10 and the circuit breaker module 20. In other words, the leakage protection device 100 of the present application no longer provides a conventional mechanical tripping transmission mechanism between the leakage detection module 10 and the circuit breaker module 20. Instead, the connection is established via an electrical transmission line 11, preferably only via the electrical transmission line 11. This significantly simplifies the structural design of the leakage protection device 100 and effectively reduces manufacturing costs.

[0075] The leakage detection module 10 may include a circuit board 14, such as a printed circuit board. The circuit board 14 may be connected to a second coil mechanism 22 installed within the circuit breaker module 20 for leakage protection via a first electrical transmission line 11. Furthermore, the circuit board 14 may be connected to the leakage detector 13 via a second electrical transmission line 15. When the leakage detector 13 detects a leakage fault, it may transmit a first electrical signal indicating the occurrence of the leakage fault to the circuit board 14 via the second electrical transmission line 15. Based on the receipt of the first electrical signal, the circuit board 14 may apply a second electrical signal, such as a predetermined voltage or current, to the second coil mechanism 22 via the first electrical transmission line 11 for controlling the circuit breaker module 20. The applied voltage or current causes the second coil mechanism 22 to move the armature 24, thereby actuating the transmission mechanism 25 and the contact assembly 26, thereby shutting off the main circuit. Advantageously, the leakage detection module 10 may no longer require a coil mechanism for leakage protection, nor may it require the corresponding armature 24 and tripping mechanism. This can significantly simplify the structural design of the leakage protection device 100 and effectively reduce the manufacturing cost.

[0076] In accordance with a modular design concept, the circuit breaker module 20 and the leakage detection module 10 can be separated from each other by an intermediate housing. To allow electrical connection between the leakage detection module 10 and the circuit breaker module 20, the intermediate housing can be provided with a through-hole 17. The first electrical transmission line 11 can be routed from the leakage detection module 10 (e.g., its printed circuit board 14) through the through-hole 17 to the interior of the circuit breaker module 20, namely, to the second coil mechanism 22. This ensures physical isolation between the two modules (reducing unwanted interference between them) while also allowing electrical connection between the two modules. In the illustrated embodiment, the circuit board 14 can be arranged within the leakage detection module 10 close to the intermediate housing. Advantageously, the circuit board 14 can be arranged in close proximity to the through-hole 17 of the intermediate housing, allowing the first electrical transmission line 11 to pass through the through-hole 17 from one side of the circuit board 14 to the circuit breaker module 20 in a shorter extension path.

[0077] In some embodiments, the leakage detection module 10 may further include a simulated leakage operation unit 16, and the simulated leakage operation unit 16 may be configured to establish a leakage circuit 18 when the simulated leakage operation unit 16 is operated, thereby simulating the occurrence of a leakage fault. That is, when the simulated leakage operation unit 16 is operated, for example, pressed, an artificially created leakage circuit 18 is established. Advantageously, the leakage circuit 18 may pass through the leakage detector 13, the simulated leakage operation unit 16 and the circuit board 14. If the leakage detector 13 can detect the artificial leakage fault and then trigger the circuit breaker module 20 to respond via the first electrical transmission line 11, it indicates that the leakage protection device 100 has a complete leakage protection function. Therefore, the establishment of the simulated leakage operation unit 16 can advantageously simplify the maintenance work of the leakage protection device 100.

[0078] Additionally or alternatively, the leakage detection module 10 may further include a communication module configured to receive a remote control signal, such as a control signal from a remote control center, and the circuit board 14 may control the second coil mechanism 22 via the first electrical transmission line 11 in response to the control signal. For example, the circuit board 14 may apply a predetermined voltage or current to the second coil of the second coil mechanism 22 via the first electrical transmission line 11 in response to the control signal, thereby shutting off the main circuit.

[0079] 6 and 7 , schematic state diagrams of the circuit breaker module 20 of the leakage protection device 100 in normal operation mode and abnormal operation mode according to some embodiments of the present application are described in detail. Abnormal operation modes may include leakage fault, short circuit fault, and overload fault.

[0080] FIG6 shows a schematic state diagram of the circuit breaker module 20 in normal operating mode. As shown in FIG6 , in normal operating mode, neither the first coil mechanism 21 nor the second coil mechanism 22 triggers the movement of the armature 24 (here, the armature 24 is illustratively arranged to be separated from the coil mechanism). The transmission mechanism 25 may include a lock catch 251, a trip catch 252, and a movable contact support 253. The lock catch 251 and the trip catch 252 are unlockably connected to each other, the trip catch 252 and the movable contact support 253 are rotatably connected to each other, and the movable contact support 253 and the movable contact 261 are rotatably connected to each other. In normal operating mode, the lock catch 251 of the transmission mechanism 25 can cooperate with the trip catch 252 to lock with each other, and the trip catch 252 and the movable contact support 253 can cooperate with each other to lock with each other, so that the transmission mechanism 25 generally forms a four-bar linkage, thereby causing the movable contact 261 to engage with the static contact 262, so that the main circuit is conductive or remains conductive.

[0081] FIG7 illustrates a schematic state diagram of the circuit breaker module 20 in an abnormal operating mode. As shown in FIG7 , the first coil mechanism 21 can be configured to trigger the movement of the armature 24 in the event of a short circuit in the main circuit, thereby driving the movement of the contact assembly 26 via the transmission mechanism 25 to shut off the main circuit. Furthermore, the second coil mechanism 22 can be configured to trigger the movement of the armature 24 in the event of a leakage fault, thereby driving the movement of the contact assembly 26 via the transmission mechanism 25 to shut off the main circuit. In the event of a short circuit or leakage fault, under the electromagnetic action of the first or second coil, the armature 24 can unlock the latch 251 and the trip latch 252, transforming the transmission mechanism 25 into a basic five-bar linkage. This in turn causes the moving contact bracket 253 to disconnect the moving contact 261 from the stationary contact 262, thereby shutting off or maintaining the main circuit off.

[0082] In addition, the handle 27 of the circuit breaker module 20 and the trip button 252 can be rotatably connected to each other, so that the closing and opening of the moving contact 261 and the static contact 262 can be manually controlled via the handle 27 .

[0083] In addition, when the overload detection device 28, such as a bimetallic device, detects an overload fault, it directly moves the lock 251 (for example, pushes the lock 251) to unlock the lock 251 and the trip lock 252, thereby causing the moving contact bracket 253 to drive the moving contact 261 and the static contact 262 to disconnect, so that the main circuit is turned off or remains turned off.

[0084] Although the exemplary embodiments of the present application have been described, it should be understood by those skilled in the art that various changes and modifications can be made to the exemplary embodiments of the present application without departing from the spirit and scope of the present application. Therefore, all changes and modifications are included in the scope of protection of the present application.

Claims

1. A leakage protection device, comprising a leakage detection module and a circuit breaker module, characterized in that: The circuit breaker module comprises a first coil mechanism for short circuit protection and a second coil mechanism for leakage protection, wherein the leakage detection module is connected to the second coil mechanism via a first electrical transmission line, and the leakage protection device comprises an intermediate shell arranged between the circuit breaker module and the leakage detection module, the leakage detection module and the circuit breaker module are separated from each other via the intermediate shell, the intermediate shell is provided with a through hole, the first electrical transmission line is guided from the leakage detection module to the circuit breaker module via the through hole, there is no tripping mechanical transmission mechanism between the circuit breaker module and the leakage detection module, and no coil mechanism for leakage protection is provided in the leakage detection module.

2. The leakage protection device according to claim 1, characterized in that: The first coil means is arranged coaxially with the second coil means.

3. The leakage protection device according to claim 2, characterized in that: The first coil mechanism and the second coil mechanism are coaxially mounted on an iron core.

4. The leakage protection device according to claim 3, characterized in that: The first coil mechanism includes a first coil sleeve and a first coil wound on the first coil sleeve. The second coil mechanism includes a second coil sleeve and a second coil wound on the second coil sleeve. The first coil sleeve and the second coil sleeve are coaxially sleeved on an iron core.

5. The leakage protection device according to claim 3, characterized in that: The first coil mechanism and the second coil mechanism include a coil sleeve and a first coil and a second coil wound on the coil sleeve; or The first coil mechanism comprises a first coil wound on an iron core, and the second coil mechanism comprises a second coil wound on the iron core; or The first coil mechanism includes a first coil wound on an iron core, and the second coil mechanism includes a coil sleeve and a second coil wound on the coil sleeve.

6. The leakage protection device according to any one of claims 1 to 5, characterized in that: The leakage detection module includes a leakage detector and a circuit board, wherein the circuit board is connected to the second coil mechanism via a first electrical transmission line, and the leakage detector is connected to the circuit board via a second electrical transmission line.

7. The leakage protection device according to claim 6, characterized in that: The leakage detection module also includes a simulated leakage operation unit, which is configured to establish a leakage circuit when the simulated leakage operation unit is operated, thereby simulating the occurrence of a leakage fault, wherein the leakage circuit passes through the leakage detector, the simulated leakage operation unit and the circuit board.

8. The leakage protection device according to claim 6, characterized in that: The leakage detection module further includes a communication module configured to receive a remote control signal, and the circuit board controls the second coil mechanism via the first electrical transmission line in response to the control signal.

9. The leakage protection device according to any one of claims 1 to 5, characterized in that: The circuit breaker module further comprises: armature; Transmission mechanism; and A contact assembly, the contact assembly comprising a moving contact and a stationary contact, The armature, the transmission mechanism and the contact assembly are mechanically connected to each other.

10. The leakage protection device according to claim 9, characterized in that: The first coil mechanism is configured to trigger the movement of the armature and then drive the movement of the contact assembly via the transmission mechanism in the event of a short circuit fault in the main circuit, so as to shut off the main circuit, and The second coil mechanism is configured to trigger the movement of the armature in the event of a leakage fault, thereby driving the movement of the contact assembly via the transmission mechanism, so as to shut off the main circuit.

11. The leakage protection device according to claim 9, characterized in that: The transmission mechanism comprises: Lock; Jump dunk; and Moving contact bracket, The lock catch and the jump catch are unlockably connected to each other, the jump catch and the moving contact bracket are rotatably connected to each other, and the moving contact bracket and the moving contact are rotatably connected to each other.

12. The leakage protection device according to claim 11, characterized in that: In the normal operation mode, the lock buckle and the trip buckle cooperate and lock with each other, and the trip buckle and the moving contact bracket cooperate and lock with each other, so that the transmission mechanism forms a four-bar linkage mechanism, thereby making the moving contact engage with the static contact; Under a short circuit fault or a leakage fault, the armature drives the lock catch and the jump catch to unlock, so that the transmission mechanism is transformed into a five-link mechanism, and then the moving contact bracket drives the moving contact and the static contact to disconnect.

13. The leakage protection device according to claim 11, characterized in that: The circuit breaker module further includes a handle, wherein the handle and the trip button are rotatably connected to each other.

14. The leakage protection device according to claim 11, characterized in that: The circuit breaker module further comprises an overload detection device, which is configured to detect an overload fault of the main circuit and directly move the lock catch to unlock the lock catch and the trip catch when an overload fault is detected.

15. The leakage protection device according to claim 14, characterized in that: The overload detection device is configured as a bimetallic device, and generates heat and deforms when an overload fault occurs in the main circuit, thereby pushing the lock.

16. The leakage protection device according to any one of claims 1 to 5, characterized in that: The circuit breaker module comprises an emergency switch and an emergency switch transmission line, wherein the emergency switch is electrically connected to the second coil mechanism via the emergency switch transmission line; and / or The circuit breaker module includes a remote control transmission line, and the remote control transmission line is electrically connected to the second coil mechanism.

17. Electrical equipment, characterized in that The electrical device comprises a first power supply line from a power source, a second power supply line to a load, and a leakage protection device according to any one of claims 1 to 16, wherein the first power supply line is connected to an input terminal of the leakage protection device and the second power supply line is connected to an output terminal of the leakage protection device.

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