Ground fault detection circuit breaking device

Abstract

The invention provides a ground fault detection circuit breaking device. The grounding fault detection circuit breaking device comprises a circuit breaker module which comprises an input end, an output end and a circuit breaker tripping rod, and the circuit breaker tripping rod is provided with a first position in a disconnection state and a second position in a connection state so as to respectively disconnect and connect power connection between the input end and the output end; the ground fault detection driving module comprises a ground fault signal processing assembly, a ground fault signal detection assembly and a driving assembly, the driving assembly responds to the control of the ground fault signal processing assembly to drive the circuit breaker tripping rod to move from the second position to the first position, and the driving assembly comprises a switch and a tripping coil assembly; the switch is in linkage with the circuit breaker tripping rod and is configured to be in an open state before the circuit breaker tripping rod moves from the first position to the second position to the first stroke and in a closed state before the circuit breaker tripping rod moves to the second stroke. According to the grounding fault detection circuit breaking device, the circuit breaker function and the grounding fault detection driving function are combined, protection for personal safety and protection for equipment and circuits are provided through a dual protection mechanism, and the use safety is improved.

Description

Technical Field

[0001] The present disclosure generally relates to the field of leakage protection devices, and more particularly to a ground fault detection circuit breaker device with ground fault protection functions and circuit breaker protection functions. Background Art

[0002] With the continuous improvement of living standards and people's safety awareness, the application scenarios of products with ground fault leakage protection function are becoming more and more extensive. Traditional ground fault leakage protection devices are usually combined with household wall sockets to detect leakage faults at the output end of the wall socket and control the socket to trip and cut off the power to protect the user's electricity safety. The more mature ground fault leakage protection devices on the market (such as ground fault circuit interrupters (GFCI)) are mainly used for protection of small current scenarios such as 20 amperes and below in household use. With the advancement of technology and changes in the power consumption environment, the market needs a leakage detection circuit breaker that can match the circuit breaker, which can realize the function of large current (above 20 amperes) leakage detection and disconnection, so as to be suitable for various applications such as mobile energy storage and high-power generators according to different needs. Summary of the invention

[0003] Based on the above requirements, the present disclosure proposes a ground fault detection circuit breaker device to meet different application scenarios in a cost-effective and reliable manner.

[0004] To this end, according to one aspect of the present disclosure, a ground fault detection circuit breaker device is provided, the ground fault detection circuit breaker device comprising: a circuit breaker module, comprising an input terminal configured to be coupled to a power supply, an output terminal configured to be coupled to a load device, and a circuit breaker tripping rod, the circuit breaker tripping rod having a first position in a disconnected state and a second position in a connected state, so as to respectively disconnect and connect the power connection between the input terminal and the output terminal; a ground fault detection driving module, comprising a housing and a ground fault signal processing component accommodated in the housing, a ground fault signal detection component coupled to the ground fault signal processing component, and a driving component coupled to the ground fault signal processing component, the driving component driving the circuit breaker tripping rod to move from the second position to the first position in response to the control of the ground fault signal processing component, wherein the driving component comprises a switch and a tripping coil component coupled to each other, the switch is linked with the circuit breaker tripping rod, and is configured to be in an open state before the circuit breaker tripping rod moves from the first position to the second position to a first stroke, and to be in a closed state before moving to a second stroke.

[0005] According to the above technical concept, the present disclosure may further include any one or more of the following optional forms.

[0006] In some optional forms, the first stroke is one quarter of the total stroke of the circuit breaker trip bar moving from the first position to the second position, and the second stroke is greater than the first stroke and less than the total stroke.

[0007] In some optional forms, the switch is configured as a normally closed switch that is in an open state when subjected to the force of the circuit breaker trip rod and returns to a closed state after the force of the circuit breaker trip rod is removed.

[0008] In certain optional forms, the switch includes a stationary contact assembly and a moving contact assembly, the stationary contact assembly includes a stationary contact piece and an electrostatic contact fixed on the stationary contact piece, the moving contact assembly includes an elastic moving contact piece and a moving electric contact fixed to one end of the elastic moving contact piece, the elastic moving contact piece is linked with the circuit breaker trip rod to separate or engage the moving electric contact with the electrostatic contact, thereby placing the switch in an open state or a closed state.

[0009] In some optional forms, the switch is configured so that when in a closed state, the elastic movable contact piece maintains elastic deformation to provide contact pressure for engagement between the movable electric contact and the electrostatic contact.

[0010] In some optional forms, a limit block is provided on the housing, and the limit block is arranged on a side of the elastic movable contact piece away from the static contact assembly to limit the travel of the elastic movable contact piece.

[0011] In some optional forms, the drive assembly further comprises a lever linked to the trip coil assembly, wherein the lever has a first position separated from the circuit breaker trip rod and a second position abutting against the circuit breaker trip rod in response to the driving of the trip coil assembly.

[0012] In certain optional forms, the trip coil assembly drives the lever to move in response to control of a ground fault signal processing assembly; and / or the trip coil assembly includes a coil winding coupled to the ground fault signal processing assembly and an iron core and a spring disposed in the coil winding, wherein the iron core is configured to be able to reciprocate in the coil winding.

[0013] In some optional forms, the lever is provided with a snap-in slot so as to be attached to the iron core and move in conjunction with the iron core to a first position or a second position; and / or the lever is provided with a pivot hole, which is attached to the housing of the ground fault detection drive module to enable the lever to pivot.

[0014] In some optional forms, the lever is provided with a foot, and the foot is provided with a toggle surface. The pivoting movement of the lever causes the toggle surface to abut against the circuit breaker trip rod and drive the circuit breaker trip rod to move from the second position to the first position, thereby placing the switch in an off state.

[0015] In some optional forms, the ground fault signal detection component includes at least a ground fault detection coil to detect a ground fault signal in a circuit loop passing through the ground fault detection coil, and the housing is provided with a cavity to accommodate and fix the ground fault detection coil.

[0016] In some optional forms, the input end and the output end are configured to be coupled to a power supply and a load device respectively via current-carrying lines.

[0017] In some optional forms, the housing is further provided with a through hole, which is concentric with the inner hole of the ground fault detection coil so as to be suitable for the current-carrying wire to pass through.

[0018] In certain optional forms, the ground fault detection drive module includes a power input terminal.

[0019] In some optional forms, the ground fault detection drive module includes an operating component, which includes at least a test component coupled to the switch to generate a simulated leakage signal and a reset component to make the input terminal and the output terminal connected again.

[0020] In some optional forms, the ground fault detection drive module includes a control circuit board for setting the ground fault signal processing component.

[0021] In some optional forms, the ground fault detection drive module includes a display component for displaying a working status.

[0022] In some optional forms, the circuit breaker module and the ground fault detection drive module are connected and relatively fixed by a fixing device.

[0023] In some optional forms, the fixing device is selected from at least one of rivets, bolts, and snaps.

[0024] According to another aspect of the present disclosure, a ground fault detection circuit breaker device is provided, the ground fault detection circuit breaker device comprising: an input end and an output end, respectively coupled to a power supply and a load device via a current-carrying line; a circuit breaker unit, configured to disconnect and connect the power connection between the input end and the output end; a ground fault signal detection unit, at least comprising a ground fault detection coil to detect leakage current on the current-carrying line; a ground fault signal processing unit, at least comprising a ground fault detection chip to determine whether the leakage current exceeds a preset value, and to generate a ground fault signal when the leakage current is greater than the preset value; a driving unit, comprising a switch, a trip coil assembly and a switch semiconductor coupled to each other, the driving unit being configured to drive the circuit breaker unit to act in response to the ground fault signal to disconnect the input end from the output end; and a trip holding unit, the trip holding unit at least comprising a holding capacitor, the holding capacitor being configured to keep the switch semiconductor in a conducting state.

[0025] In some optional forms, the trip holding unit further includes a fault indicator configured to issue a leakage fault indication in response to the ground fault signal.

[0026] In certain optional forms, the ground fault detection circuit breaker device also includes a leakage self-detection unit, which is coupled to the driving unit and configured to periodically detect whether the ground fault signal processing unit functions normally and generate a leakage self-detection fault signal when the ground fault signal processing unit fails to function.

[0027] In some optional forms, the ground fault detection circuit breaker device further includes an operating unit, which includes at least a test button coupled to the switch to generate a simulated leakage signal and a reset button to restore the switch semiconductor to a cut-off state.

[0028] The ground fault detection circuit breaker device disclosed in the present invention combines the circuit breaker function with the ground fault detection driving function, provides personal safety protection and equipment and circuit protection through a dual protection mechanism, can effectively provide power-off protection in the event of a leakage fault, is suitable for a variety of electrical equipment, and improves safety in use. The ground fault detection circuit breaker device disclosed in the present invention has a simple structure, low cost, is easy to implement, has reliable performance, is suitable for automated production, and can be applied to various occasions. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Other features and advantages of the present disclosure will be better understood through the following optional embodiments described in detail in conjunction with the accompanying drawings, in which:

[0030] Figure 1A Schematic diagram of the appearance of a ground fault detection circuit breaker device according to an embodiment of the present disclosure. Figure 1B for Figure 1AAn exploded schematic diagram of a ground fault detection circuit breaker device shown;

[0031] Figure 2A for Figure 1A The schematic diagram of the ground fault detection driving module in the ground fault detection circuit breaker device is shown, and the assembly relationship between the lever and the housing is shown. Figure 2B for Figure 2A An exploded schematic diagram of a ground fault detection drive module is shown;

[0032] Figure 3A This is a schematic diagram of the exploded view of the trip coil assembly in the ground fault detection drive module. Figure 3B A schematic diagram of the lever;

[0033] Figure 4A for Figure 1A The schematic diagram of the circuit breaker module in the ground fault detection circuit breaker device shown in FIG. Figure 4B is a schematic diagram of a ground fault detection drive module, showing the matching surfaces of a circuit breaker module and a ground fault detection drive module respectively;

[0034] Figure 5A This is a schematic diagram of the positions of the components of the ground fault detection circuit breaker in the initial disconnection state. Figure 5B A schematic diagram of the positions and states of the components of the ground fault detection circuit breaker during the process from the initial disconnected state to the normal connected state;

[0035] Fig. 6A This is a schematic diagram of the status of various components when the circuit breaker tripping rod of the circuit breaker module is at a quarter of the stroke. Figure 6B for Fig. 6A The enlarged schematic diagram of part A in the figure. Figure 6C This is a schematic diagram of the state where the switch of the ground fault detection drive module is closed before the input end and the output end are connected. Fig.6D for Figure 6C A magnified schematic diagram of part B;

[0036] Fig. 7A This is a schematic diagram of the position and status of each component when the ground fault detection circuit breaker is in a normal connected state. Figure 7B A schematic diagram showing that after a ground fault detection circuit breaker device detects a fault signal, the trip coil assembly drives the lever to place the circuit breaker trip lever and the switch in an off state;

[0037] Fig. 8A FIG. 1 is a schematic diagram of the appearance of a ground fault detection circuit breaker device with a two-pole circuit breaker module according to another embodiment of the present disclosure. Figure 8B It is a schematic diagram of the appearance of a ground fault detection circuit breaker device with a three-pole circuit breaker module according to another embodiment of the present disclosure;

[0038] Fig. 9 It is a schematic diagram of the principle of a ground fault detection circuit breaker device according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0039] The implementation and use of the embodiments are discussed in detail below. However, it should be understood that the specific embodiments discussed are merely exemplary of specific ways to implement and use the present disclosure, and are not intended to limit the scope of the present disclosure. When describing the structural positions of the various components, such as up, down, top, bottom, etc., the expressions of directions are not absolute, but relative. When the various components are arranged as shown in the figure, these directional expressions are appropriate, but when the positions of the various components in the figure change, these directional expressions also change accordingly.

[0040] Herein, the expression “include” or similar expressions “including” and “having” and the like are open-ended and do not exclude additional unlisted elements or functions.

[0041] In this document, unless otherwise specifically defined, the terms "coupled", "installed", "connected", "attached" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meanings of the above terms in this document can be understood according to the specific circumstances.

[0042] Herein, the terms "first", "second", etc. are not used to limit the order of precedence or quantity unless otherwise specified.

[0043] It is recognized that traditional circuit breakers cannot provide power-off protection in the event of leakage, and the existing leakage protection devices have limited application scenarios. In order to meet the more diversified needs of consumers, such as the need for products to be suitable for various application scenarios such as high current scenarios, the present disclosure provides a ground fault detection circuit breaker device that combines the circuit breaker function with the ground fault detection drive function, and provides protection for personal safety and protection for equipment and circuits through a dual protection mechanism, making the ground fault protection device safer, more reliable and more widely used.

[0044] Specifically, combined Figure 1A and Figure 1BAccording to one embodiment, a ground fault detection circuit breaker device includes a ground fault detection drive module 1 and a circuit breaker module 2, wherein the circuit breaker module 2 includes an input terminal 25 and an output terminal 26, wherein the input terminal 25 is configured to be coupled to a power supply, and the output terminal 26 is configured to be coupled to a load device. The circuit breaker module 2 has a circuit breaker assembly that can be operated to connect or disconnect the input terminal 25 and the output terminal 26. In the illustrated embodiment, the circuit breaker assembly may include an operating handle 21 and a circuit breaker tripping rod 23, wherein the operating handle 21 is configured to be able to move between an initial disconnecting position and a final connecting position, and drive the circuit breaker tripping rod 23 to move between a first position and a second position. When the operating handle 21 is in the initial disconnected position, the circuit breaker tripping rod 23 is also in its first position, and the input terminal 25 and the output terminal 26 are in a disconnected state; when the operating handle 21 moves from the initial disconnected position to the final connected position, the circuit breaker tripping rod 23 will be driven to move to its second position, so that the input terminal 25 and the output terminal 26 can be in a connected state and form an electrical connection. Thereafter, according to the design of the present disclosure, if the circuit breaker tripping rod 23 is placed in its first position, the input terminal 25 and the output terminal 26 of the circuit breaker module 2 can be disconnected, and the operating handle 21 can be restored to the initial disconnected position at this time. Even if the operating handle 21 is restricted to the final connected position due to special reasons, the input terminal 25 and the output terminal 26 can also be disconnected; when the circuit breaker tripping rod 23 is placed in its first position, even if the operating handle 21 moves from the initial disconnected position to the final connected position, the input terminal 25 and the output terminal 26 cannot be connected. In this way, the working characteristic of the circuit breaker device 2 is utilized in combination with the functional characteristics of the ground fault detection drive device 1 to realize the ground fault circuit breaking protection function under the condition of a large current loop, which will be described in detail below.

[0045] Advantageously, when the input terminal 25 and the output terminal 26 are in a connected state or a closed state, the ground fault detection drive module 1 can drive the circuit breaker tripping rod 23 to place the circuit breaker tripping rod 23 in its first position to disconnect the input terminal 25 and the output terminal 26, which will be described in detail below. In addition, the circuit breaker module 2 also includes at least one mounting unit 22, which is suitable for mounting and fixing the circuit breaker module 2 to a desired position or component. Similarly, the ground fault detection drive module 1 also includes at least one mounting unit 22, which is suitable for mounting the ground fault detection drive module 1 to a desired position or component, such as Figure 1B The mounting unit 22 includes but is not limited to screws, bolts, rails, etc., such as the panel bolts shown in the figure.

[0046] Depending on different needs, the ground fault detection circuit breaker device according to the present disclosure may include at least one-pole circuit breaker module 2. For example Figure 1A to Figure 1B In the embodiment shown, the one-pole circuit breaker module 2 and the ground fault detection drive module 1 can be connected and relatively fixed by a fixing device 3, for example Figure 1B As shown, the fixing device 3 includes, for example but not limited to, rivets, bolts, screws, buckles, connecting sheets or fixing blocks and other components suitable for fixing. Fig. 8A The ground fault detection circuit breaker device composed of a two-pole circuit breaker module 2 and a ground fault detection drive module 1 is exemplarily shown. Figure 8B The ground fault detection circuit breaker device is exemplarily shown as a combination of a three-pole circuit breaker module 2 and a ground fault detection drive module 1. It should be understood that the number of circuit breaker modules is not limited here.

[0047] FIG. 2A to FIG. 2B The invention shows a ground fault detection driving module 1 and its main components in an embodiment. The ground fault detection driving module 1 is used to detect a ground fault at the output end. When a ground fault is detected, the circuit breaker tripping rod 23 of the circuit breaker module 2 can be driven to operate so that the power connection between the input end 25 and the output end 26 is disconnected.

[0048] In the illustrated embodiment, the ground fault detection drive module 1 includes a housing, a ground fault signal processing component 111 housed in the housing, a ground fault signal detection component 112 coupled to the ground fault signal processing component 111, and a drive component 106. The ground fault signal processing component 111, for example, includes at least a control circuit board 111a. The ground fault signal detection component 112, for example, includes at least a ground fault detection coil to detect a ground fault signal in a circuit loop passing through the ground fault detection coil. The housing is provided with a cavity to accommodate and fix the ground fault detection coil. The housing is also provided with a through hole, which is concentric with the inner hole of the ground fault detection coil. Figure 1B As shown, the input terminal 25 and the output terminal 26 are configured to be coupled to the power supply (LINE) and the load device (LOAD) via current-carrying wires (hot wire HOT, neutral wire WHITE), respectively, and the through hole of the housing is suitable for the current-carrying wire to pass through. In addition, the ground fault detection driving module 1 also includes a power input terminal 100 for providing power to the ground fault detection driving module. Depending on different needs, the power input terminal 100 can be a connecting piece or a connecting terminal, etc.

[0049] The ground fault detection drive module 1 may also include an operating component, combined with Figure 1B and Figure 2BThe operating component at least includes a test component to generate a simulated leakage signal and a reset component to make the input end and the output end connected again. The test component may include an electronic component that can be coupled to the ground fault signal processing component 111 and a test button 110b to simulate the leakage current and generate a ground fault signal. The surface of the shell is provided with at least one test hole, and the test hole is used to allow part of the test button 110b to pass through the shell. The reset component may include an electronic component that can be coupled to the ground fault signal processing component 111 and a reset button 110a, and the surface of the shell is provided with at least one reset hole, and the reset hole is used to allow part of the reset button 110a to pass through the shell.

[0050] In some implementations, the ground fault detection and driving module 1 may further include a display component 115 to display the working status. Figure 1B and Figure 2B The display component may, for example, include a status indicator light coupled to the ground fault signal processing component 111, and the surface of the housing may be provided with at least one display window, the display window being used to allow the display signal of the display component to pass through the housing, and to provide an alarm display when a ground fault occurs by visually observing the status indicator light in the display window. When the fault is cleared, the alarm display may be cleared by pressing the reset button 110a. Advantageously, the reset component is configured such that when the input terminal and the output terminal are in a disconnected state due to a ground fault or a simulated ground fault and the display component 115 is in an alarm display state, and the input terminal and the output terminal cannot be connected even if the operating handle 21 is moved to its final connection position again, it is necessary to operate the reset button 110a after the ground fault is eliminated, and to move the operating handle 21 to its final connection position again after the fault alarm state is released, so that the input terminal and the output terminal are in a connected state or a closed state again.

[0051] The driving component 106 can drive the circuit breaker tripping rod to move from the second position to the first position in response to the control of the ground fault signal processing component 111. The driving component 106 may include a switch 106e and a tripping coil component 106a coupled to each other, and the switch 106e can be linked with the circuit breaker tripping rod 23. The driving component 106 advantageously also includes a lever 106b linked with the tripping coil component 106a. The lever 106b is configured to drive the circuit breaker module 2, that is, the lever 106b has a first position separated from the circuit breaker tripping rod 23 and a second position abutting against the circuit breaker tripping rod 23 in response to the driving of the tripping coil component 106a. Specifically, when the ground fault signal detection component 112 detects a ground fault signal, the tripping coil component 106a can be controlled to move by the control circuit board 111a, thereby driving the lever 106b to move the circuit breaker tripping rod 23 to its first position, so that the input end and the output end are disconnected, which will be described in detail below.

[0052] Figure 3A and Figure 3B An exploded schematic diagram of a tripping coil assembly 106 a and a schematic diagram of a lever 106 b in the driving assembly 106 are shown as examples.

[0053] The trip coil assembly 106a may include an iron core 106a1, an iron core spring 106a2, and a coil winding 106a3. The coil winding 106a3 is coupled to the ground fault signal processing assembly 111 and can generate a magnetic field in a power-on state and remove the magnetic field in a power-off state in response to the control of the ground fault signal processing assembly 111. The coil winding 106a3 is provided with a central hole 106a31 for the iron core 106a1 to be inserted. The iron core 106a1 passes through the coil winding 106a3 and one end can be attached to the lever 106b, and the other end abuts against the iron core spring 106a2. In response to the power-on state or the power-off state of the coil winding 106a3, the iron core 106a1 reciprocates in the central hole 106a31 of the coil winding 106a3 under the action of the magnetic force of the coil magnetic field and the elastic force of the iron core spring 106a2, thereby driving the lever 106b to move.

[0054] The lever 106b is provided with a foot 106b1, wherein the foot 106b1 is suitable for driving the circuit breaker tripping rod 23 so that the input and output ends on the circuit breaker module are switched from the connected state to the disconnected state. Advantageously, the lever 106b is also provided with a pivot hole 106b2, and the pivot hole 106b2 is attached to the housing of the ground fault detection driving module 1, for example, attached to Figure 2B The pivot shaft 105a is shown so that the lever 106b can pivot. In this way, the lever 106b is configured to pivot around its pivot hole 106b2 as the core 106a1 moves. Specifically, the end of the iron core 106a1 is provided with an iron core groove 106a11, and the lever 106b is correspondingly provided with a snap-fitting notch 106b3 to snap-fit ​​with the iron core groove 106a11 and move (pivot) to the first position or the second position in conjunction with the iron core 106a1, that is, when the coil winding 106a3 is energized, a magnetic field is generated to drive the iron core 106a1 to move into the center hole 106a31, thereby driving the lever 106b to pivot to the second position abutting against the circuit breaker tripping rod 23. Conversely, when the coil winding 106a3 is de-energized and the magnetic field disappears, under the action of the rebound force of the iron core spring 106a2, the iron core 106a1 together with the lever 106b returns to the initial position, that is, the lever 106b pivots to the first position separated from the circuit breaker tripping rod 23. Figure 3B As shown, the leg 106b1 of the lever 106b may be provided with a toggle surface 106b11, and the pivoting movement of the lever 106b will cause the toggle surface 106b1 to abut against the circuit breaker tripping rod 23 and drive the circuit breaker tripping rod 23 to move from its second position to its first position.

[0055] Figure 4A and Figure 4B The mating surfaces of the circuit breaker module and the ground fault detection drive module are shown respectively, wherein the mating surface of the circuit breaker module is provided with an opening for the circuit breaker tripping rod 23 to extend, and the mating surface of the ground fault detection drive module is also provided with an opening for the lever of the drive assembly to extend, so that the ground fault detection drive module 1 is attached and linked with the circuit breaker module 2, that is, the lever is suitable for driving the circuit breaker tripping rod 23, Figure 4B The foot 106b1 of the lever 106b is schematically shown.

[0056] As described above, according to the concept of the present disclosure, the drive component 106 includes a switch 106e, which can be coupled to the operating component, specifically, can be coupled to the test component. Depending on different needs, the switch can be in the form of a contact arm that can be turned on and off by a contact, for example, but not limited to. Figure 2B , FIG. 5A to FIG. 7B The switch 106e is configured to be linked with the circuit breaker tripping rod 23, and can realize reliable and safe connection or disconnection between the input terminal 25 and the output terminal 26 by cooperating with the tripping coil assembly 106a and the lever 106b of the driving assembly 106. By reasonably setting the relationship between the switch state and the stroke of the circuit breaker tripping rod, the circuit breaker tripping rod can keep the switch in the open state and the closed state in time when it moves from the first position to the second position, and when the lever is driven by the tripping coil assembly, it can drive the circuit breaker module to trip and disconnect the switch, thereby avoiding overheating and damage of the tripping coil winding due to long-term power-on.

[0057] Specifically, when the input terminal 25 and the output terminal 26 need to be connected and the operating handle 21 is moved from its initial disconnected position to its final connected position, the switch 106e is first in a closed state. At this time, if the ground fault signal detection component 112 detects a ground fault signal, the control circuit board 111a can directly control the tripping coil component 106a to operate, and then drive the lever 106b to place the circuit breaker tripping rod 23 in its first position. At this time, even if the operating handle 21 continues to be moved to its final connected position, the input terminal 25 and the output terminal 26 cannot be connected, thereby avoiding the occurrence of dangerous situations caused by misoperation. In particular, in some embodiments, for example, when the movement of the operating handle 21 from the final connected position to the initial disconnected position is limited, if the ground fault signal detection component 112 detects a ground fault signal, it can still control the lever 106b to operate to drive the circuit breaker tripping rod 23 to move from its second position to its first position, thereby disconnecting the input terminal 25 from the output terminal 26, and at the same time making the switch 106e in an open state. This avoids the problem of being unable to disconnect the power connection due to obstruction of the operating handle 21, and improves the stability and reliability of the ground fault detection drive module.

[0058] In some embodiments, the switch 106e is configured to be in an open state before the circuit breaker trip bar 23 moves from the first position to the second position to a first stroke, and to be in a closed state before moving to a second stroke. Figure 5A The figure shows the initial state in which the operating handle 21 is in the initial disconnecting position and the circuit breaker tripping rod 23 is in the first position. Figure 5B The figure shows a connection state in which the operating handle 21 moves in the direction of the arrow to the final connection position and the circuit breaker tripping rod 23 is in the second position, wherein the movement stroke of the operating handle 21 (and the corresponding movement stroke of the circuit breaker tripping rod 23) is schematically divided into multiple stages, for example Figure 5B According to different needs, the first stroke can be set to be one quarter of the total stroke of the circuit breaker tripping rod moving from the first position to the second position, and the second stroke is greater than the first stroke and less than the total stroke. It should be understood that the first stroke can be adjusted accordingly depending on different needs.

[0059] Advantageously, the switch 106e is configured as a normally closed switch that is in an open state when subjected to an external force and returns to a closed state after the external force is removed. In the present disclosure, the external force is applied by the circuit breaker trip rod 23. In some embodiments, the switch 106e includes a stationary contact assembly 106e1 and a moving contact assembly 106e2, Figure 6B or Fig.6D As shown, the stationary contact assembly 106e1 includes a stationary contact piece 106e11 and an electrostatic contact 106e12 fixed on the stationary contact piece 106e11, and the moving contact assembly 106e2 includes an elastic moving contact piece 106e21 and a moving electric contact 106e22 fixed to one end of the elastic moving contact piece 106e21. The elastic moving contact piece 106e21 is linked with the circuit breaker tripping rod 23 to separate or engage the moving electric contact 106e22 with the electrostatic contact 106e12, thereby placing the switch 106e in an open state or a closed state. Figure 5A In the initial disconnecting state shown, the elastic movable contact piece 106e21 of the movable contact assembly 106e2 is placed in a disconnected state separated from the static contact assembly 106e1 due to the contact of the circuit breaker tripping rod 23. Figure 5B In the connected state shown, the circuit breaker tripping rod 23 is in the second position and the moving contact assembly 106e2 and the stationary contact assembly 106e1 are in an engaged closed state. In some embodiments, a limit block (not shown in the figure) may be provided on the housing, and the limit block is arranged on a side of the elastic moving contact piece 106e21 away from the stationary contact assembly 106e1 to limit the travel of the elastic moving contact piece.

[0060] Fig. 6A and Figure 6B FIG. 2 shows the state of each component when the circuit breaker tripping rod 23 of the circuit breaker module is in the first stroke (for example, a quarter stroke). Figure 6B As shown, at this first stroke, the elastic moving contact piece 106e21 of the moving contact assembly 106e2 of the switch 106e is still in a disconnected state due to the abutment of the circuit breaker trip rod 23, and the moving electric contact 106e22 is separated from the electrostatic contact 106e12. At this time, the input terminal 25 and the output terminal 26 are not yet connected.

[0061] When the operating handle 21 drives the circuit breaker tripping rod 23 to continue to move, if the ground fault signal detection component 112 does not detect the ground fault signal or the ground fault signal simulated by the test component, the operating handle 21 can be smoothly moved, and at the same time drives the circuit breaker tripping rod 23 to move to its second position, so that the input end and the output end are smoothly connected. During this period, the circuit breaker tripping rod 23 moves to the second stroke, and the second stroke is, for example, half of the total stroke. Figure 6C As shown in FIG. 1 , before the input terminal 25 is connected to the output terminal 26 (that is, before the circuit breaker tripping rod 23 moves to its second position), the switch 106e is in a closed state. Fig.6D As shown, the moving electric contact 106e22 is engaged with the electrostatic contact 106e12. Afterwards, the operating handle 21 is continuously moved until the circuit breaker tripping rod 23 moves to its second position, so that the input terminal 25 is connected with the output terminal 26, as shown in FIG. Fig. 7A Advantageously, the switch 106e is configured such that when in a closed state, the elastic movable contact piece 106e21 maintains elastic deformation to provide contact pressure for engagement between the movable electric contact 106e22 and the electrostatic contact 106e12.

[0062] If the ground fault signal detection component 112 detects the ground fault signal and sends an action signal, the feedback data is sent to the ground fault signal processing component 111. The ground fault signal processing component 111 compares the leakage current feedback data with the preset value. If the leakage current is less than the preset value, the driving component 106 is not controlled to act. If the leakage current is greater than the preset value, the driving component 106 is controlled to act. Specifically, when the driving component 106 is controlled to act, the coil winding 106a3 of the tripping coil component 106a is energized and generates a magnetic field to drive the iron core 106a1 to drive the lever 106b to pivot synchronously, until the leg 106b1 of the lever 106b abuts against the circuit breaker tripping rod 23 and drives the circuit breaker tripping rod 23 to move to its first position, preventing the input terminal 25 from being connected to the output terminal 26. At the same time, due to the abutment of the circuit breaker trip rod 23, the moving electric contact 106e22 of the moving contact assembly 106e2 is separated from the electrostatic contact 106e12 of the static contact assembly 106e1, and even if the operating handle 21 is moved to its initial disconnecting position, the input end and the output end cannot be connected. Figure 7B When detecting a ground fault signal simulated by a test assembly, the operation is similar and will not be described in detail here.

[0063] In some cases, when the handle 21 is operated, for example Figure 7B When it is in its final connected position and cannot move freely due to external reasons, if the ground fault signal detection component detects a ground fault signal or the test button is pressed, the ground fault detection drive module can still cause the lever 106b of the drive component 106 to move, thereby driving the circuit breaker tripping rod 23 to be placed in its first position, disconnecting the input end from the output end, and placing the switch 106e in the disconnected state.

[0064] When the input and output ends are disconnected from each other due to the ground fault signal detection component detecting a ground fault signal or pressing a test button, if the power connection between the input and output ends needs to be reconnected, the ground fault alarm state needs to be cleared by operating the reset component after eliminating the ground fault, and the operating handle 21 can be continued to be operated to connect the power connection between the input and output ends. In this way, the ground fault detection circuit breaker device disclosed in the present invention can drive the circuit breaker to trip in the case of a leakage fault through the coordinated cooperation of the ground fault signal processing component, the ground fault signal detection component, the driving component, the operating component, and the display component, etc., and is suitable for a variety of electrical equipment, improves the safety of electricity use, and can be applied to various occasions.

[0065] Combination Fig. 9 As shown, the present disclosure also provides a ground fault detection circuit breaker device, the ground fault detection circuit breaker device comprising: an input end and an output end, respectively coupled to a power supply LINE and a load device LOAD via current-carrying lines L1, L2, and N; a circuit breaker unit 1, configured to disconnect and connect the power connection between the input end and the output end; a ground fault signal detection unit 2, at least comprising a ground fault detection coil CT1 to detect leakage current on the current-carrying lines L1, L2, and N; a ground fault signal processing unit 3, at least comprising a ground fault detection chip U1 to determine whether the leakage current exceeds a preset value, and to generate a ground fault signal when the leakage current is greater than the preset value; a driving unit 4, comprising a switch SW, a trip coil assembly SOL1, and a switch semiconductor Q1 / Q2 coupled to each other, the driving unit 4 being configured to drive the circuit breaker unit 1 to act in response to the ground fault signal to disconnect the input end from the output end. The ground fault detection circuit breaker device further comprises a trip holding unit 5 , which comprises at least a holding capacitor C11 , and the holding capacitor is configured to keep the switching semiconductors Q1 / Q2 in a conducting state.

[0066] In some embodiments, the trip holding unit 5 may further include a fault indicator (light emitting diode) LD2, which is configured to issue a leakage fault indication in response to the ground fault signal.

[0067] In some embodiments, the ground fault detection circuit breaker device may also include a leakage self-detection unit 6, which is coupled to the driving unit 4 and configured to periodically detect whether the ground fault signal processing unit 3 functions normally and generate a leakage self-detection fault signal when the ground fault signal processing unit 3 fails to function.

[0068] In some embodiments, the ground fault detection circuit breaker device may further include an operating unit 7, which includes at least a test button TEST coupled to the switch SW to generate a simulated leakage signal and a reset button RESET to restore the switch semiconductor Q1 / Q2 to a cut-off state.

[0069] Under normal circumstances, the current flows through the current-carrying line L1-switch SW-tripping coil assembly SOL1-DB1 to supply power to the leakage detection chip U1. When the fault detection coil CT1 detects the leakage current on the current-carrying lines L1, L2, and N, a leakage signal is generated at the secondary side, and is processed and compared by the leakage detection chip U1. When the leakage current on L1, L2, and N is greater than the preset value, the driving pin (pin 5) of the leakage detection chip U1 sends a high level (ground fault signal), and drives the thyristor Q1 / Q2 (switching semiconductor) to conduct through the diode D4-R16 / R016. At this time, the current flows into the ground through the current-carrying line L1-switch SW-tripping coil assembly SOL1-DB1-thyristor Q1 / Q2, and the tripping coil assembly SOL1 is energized and generates a large magnetic field, driving the circuit breaker unit 1 to disconnect the power connection between the input and output ends, and at the same time driving the switch SW to disconnect, so that the tripping coil assembly SOL1 loses power, preventing the tripping coil assembly SOL1 from being burned by long-term power-on.

[0070] When the thyristor Q1 / Q2 is turned on, the current also passes through L1-D2-R2, and after being filtered by the holding capacitor C11, it flows into the ground through R7-light-emitting diode LD2 (fault indicator)-D3-Q1 / Q2, lighting up the light-emitting diode LD2 to give a ground fault indication, and keeping the thyristor Q1 / Q2 in the on state. When the circuit breaker unit 1 is operated to close, the switch SW is turned on earlier than the circuit breaker unit 1. When the switch SW is turned on, since the thyristor Q1 / Q2 remains in the on state, the current passes through the trip coil assembly SOL1 again, and generates a magnetic field to drive the circuit breaker unit 1 to disconnect, so that the circuit breaker unit 1 cannot complete the closing action, so that the input and output ends remain in the disconnected state.

[0071] When the reset button RESET is operated, the current rectified by the holding capacitor C11 flows directly into the ground from RESET, and no longer flows through Q1 / Q2, thereby cutting off Q1 / Q2. When the circuit breaker unit 1 is operated to close again, no current flows through the trip coil assembly SOL1, and the circuit breaker unit 1 will not be driven to trip again. The circuit breaker unit 1 is closed successfully, thereby connecting the power connection between the input end and the output end.

[0072] Under normal circumstances, when the test button TEST is pressed, the manual simulated leakage current is passed through the current-carrying line L1-switch SW-R10-test button TEST-CT1-ground. When the fault detection coil CT1 detects the manual simulated leakage current signal and is processed and compared by the leakage detection chip U1, the driving pin (pin 5) of the leakage detection chip U1 sends a high level, and the diode D4-R16 / R016 drives the thyristor Q1 / Q2 to turn on. At this time, the current flows into the ground through the current-carrying line L1-switch SW-tripping coil component SOL1-DB1-thyristor Q1 / Q2, and the tripping coil component SOL1 is energized and generates a large magnetic field, driving the circuit breaker unit 1 to disconnect the power connection between the input and output ends, which indicates that the ground fault detection circuit breaker device is functioning properly. On the contrary, when the test button TEST is pressed, the circuit breaker unit 1 does not disconnect the power connection between the input and output ends, which indicates that the ground fault detection circuit breaker device has lost its function and needs to be replaced immediately.

[0073] Due to the leakage self-checking unit 6, the ground fault detection circuit breaker also has a leakage self-checking function. The current charges the capacitor C10 through L1-D1-R8. When the voltage on the upper end of the capacitor C10 exceeds the trigger voltage of the trigger diode ZD1, the trigger diode is turned on, and the current generates a simulated leakage current through the trigger diode ZD1-R11-CT1-ground. At the same time, the capacitor C8 is charged through R12. CT1 detects the simulated leakage current, and after being processed by the leakage detection chip U1, a high level is issued at the trigger pin (pin 5). The current charges C2 / C02 through R16 / R016. At the same time, the current triggers Q3 to turn on through R17, and the voltage on the upper end of the capacitor C10 decreases rapidly. ZD1 stops triggering, and the trigger pin of U1 stops outputting a high level. Due to the short triggering time, the voltage on the upper ends of C2 / C02 and C8 is low at this time, which is not enough to turn on Q1 / Q2, and the circuit breaker unit 1 remains in a closed state. When a component failure occurs, causing the trigger pin of the leakage detection chip U1 to be unable to output a high level when ZD1 sends out a simulated leakage current, ZD1 will remain turned on for a long time, causing the voltage on the upper end of C8 to continue to rise, and eventually generating a leakage self-detection fault signal, triggering Q1 / Q2 to turn on through D5-R16 / R016, and the current flows into the ground through L1-switch SW-tripping coil component SOL1-DB1-Q1 / Q2. The tripping coil component SOL1 generates a magnetic field, causing the circuit breaker unit 1 to disconnect the power connection between the input and output ends, thereby completing the self-detection function.

[0074] It should be understood here that the embodiments shown in the figures only show the optional shapes, sizes and arrangements of the various optional components of the ground fault detection circuit breaker device according to the present disclosure, but they are only for illustration and not for limitation. Other shapes, sizes and arrangements may also be adopted without departing from the concept and scope of the present disclosure.

[0075] The technical content and technical features of the present disclosure have been disclosed above. However, it can be understood that under the creative ideas of the present disclosure, technicians in this field can make various changes and improvements to the above disclosed concepts, but they all belong to the protection scope of the present disclosure. The description of the above implementation mode is illustrative rather than restrictive, and the protection scope of the present disclosure is determined by the claims.

Claims

1. A ground fault detection circuit breaker device, characterized in that: The ground fault detection circuit breaker device comprises: A circuit breaker module, comprising an input terminal configured to be coupled to a power supply, an output terminal configured to be coupled to a load device, and a circuit breaker tripping rod, wherein the circuit breaker tripping rod has a first position in a disconnected state and a second position in a connected state, so as to disconnect and connect the power connection between the input terminal and the output terminal respectively; A ground fault detection drive module comprises a housing and a ground fault signal processing component housed in the housing, a ground fault signal detection component coupled to the ground fault signal processing component, and a drive component coupled to the ground fault signal processing component, wherein the drive component drives the circuit breaker tripping rod to move from the second position to the first position in response to control of the ground fault signal processing component. The drive assembly includes a switch and a trip coil assembly coupled to each other, the switch is linked to the circuit breaker trip rod, and is configured to be in an open state before the circuit breaker trip rod moves from the first position to the second position to a first stroke, and to be in a closed state before moving to a second stroke.

2. The ground fault detection circuit breaker device according to claim 1, characterized in that: The first stroke is one quarter of the total stroke of the circuit breaker tripping rod moving from the first position to the second position, and the second stroke is greater than the first stroke and less than the total stroke.

3. The ground fault detection circuit breaker device according to claim 1, characterized in that: The switch is configured as a normally closed switch which is in an open state due to the force applied by the circuit breaker trip rod and returns to a closed state after the force applied by the circuit breaker trip rod is removed.

4. The ground fault detection circuit breaker device according to claim 3, characterized in that: The switch comprises a stationary contact assembly and a moving contact assembly, wherein the stationary contact assembly comprises a stationary contact piece and an electrostatic contact fixed on the stationary contact piece, and the moving contact assembly comprises an elastic moving contact piece and a moving electric contact fixed to one end of the elastic moving contact piece, wherein the elastic moving contact piece is linked with the circuit breaker tripping rod to separate or engage the moving electric contact with the electrostatic contact, thereby placing the switch in an open state or a closed state.

5. The ground fault detection circuit breaker device according to claim 4, characterized in that: The switch is configured such that when in a closed state, the elastic movable contact piece maintains elastic deformation to provide contact pressure for engagement between the movable electric contact and the electrostatic contact.

6. The ground fault detection circuit breaker device according to claim 4, characterized in that: A limit block is provided on the housing, and the limit block is arranged on a side of the elastic movable contact piece away from the static contact assembly to limit the travel of the elastic movable contact piece.

7. The ground fault detection circuit breaker device according to claim 1, characterized in that: The driving assembly further comprises a lever linked to the tripping coil assembly, wherein the lever has a first position separated from the circuit breaker tripping rod and a second position abutting against the circuit breaker tripping rod in response to the driving of the tripping coil assembly.

8. The ground fault detection circuit breaker device according to claim 7, characterized in that: The trip coil assembly drives the lever to move in response to the control of the ground fault signal processing assembly; And / or the trip coil assembly includes a coil winding coupled to the ground fault signal processing assembly, and an iron core and a spring disposed in the coil winding, wherein the iron core is configured to be able to reciprocate in the coil winding.

9. The ground fault detection circuit breaker device according to claim 8, characterized in that: The lever is provided with a snap-in slot to be attached to the iron core and move in conjunction with the iron core to a first position or a second position; and / or the lever is provided with a pivot hole, which is attached to the housing of the ground fault detection drive module to enable the lever to pivot.

10. The ground fault detection circuit breaker device according to claim 9, characterized in that: The lever is provided with a foot, and the foot is provided with a toggle surface. The pivoting movement of the lever causes the toggle surface to abut against the circuit breaker tripping rod and drive the circuit breaker tripping rod to move from the second position to the first position, thereby placing the switch in an off state.

11. The ground fault detection circuit breaker device according to claim 1, characterized in that: The ground fault signal detection component at least includes a ground fault detection coil to detect a ground fault signal in a circuit loop passing through the ground fault detection coil. The housing is provided with a cavity to accommodate and fix the ground fault detection coil.

12. The ground fault detection circuit breaker device according to claim 11, characterized in that: The input end and the output end are configured to be coupled to a power supply and a load device respectively via current-carrying lines.

13. The ground fault detection circuit breaker device according to claim 12, characterized in that: The housing is further provided with a through hole, which is concentric with the inner hole of the ground fault detection coil so as to be suitable for the current-carrying wire to pass through.

14. The ground fault detection circuit breaker device according to claim 1, characterized in that: The ground fault detection and driving module includes a power input terminal.

15. The ground fault detection circuit breaker device according to claim 1, characterized in that: The ground fault detection and driving module comprises an operating component, which at least comprises a test component coupled to the switch to generate a simulated leakage signal and a reset component to make the input terminal and the output terminal connected again.

16. The ground fault detection circuit breaker device according to claim 1, characterized in that: The ground fault detection and driving module comprises a control circuit board for setting the ground fault signal processing component.

17. The ground fault detection circuit breaker device according to claim 1, characterized in that: The ground fault detection drive module includes a display component for displaying a working status.

18. The ground fault detection circuit breaker device according to any one of claims 1 to 17, characterized in that: The circuit breaker module and the ground fault detection drive module are connected and relatively fixed via a fixing device.

19. The ground fault detection circuit breaker device according to claim 18, characterized in that: The fixing device is selected from at least one of rivets, bolts, screws, buckles, connecting plates, and fixing blocks.

20. A ground fault detection circuit breaker device, characterized in that: The ground fault detection circuit breaker device comprises: The input end and the output end are coupled to the power supply and the load device respectively via current-carrying lines; a circuit breaker unit configured to disconnect and connect the power connection between the input end and the output end; a ground fault signal detection unit, comprising at least a ground fault detection coil to detect leakage current on the current-carrying wire; A ground fault signal processing unit, comprising at least a ground fault detection chip, to determine whether the leakage current exceeds a preset value, and to generate a ground fault signal when the leakage current is greater than the preset value; A driving unit, comprising a switch, a trip coil assembly and a switch semiconductor coupled to each other, wherein the driving unit is configured to drive the circuit breaker unit to operate in response to the ground fault signal so as to disconnect the input terminal from the output terminal; A tripping holding unit, the tripping holding unit at least comprises a holding capacitor, and the holding capacitor is configured to keep the switch semiconductor in a conducting state.

21. The ground fault detection circuit breaker device according to claim 20, characterized in that: The trip holding unit further includes a fault indicator configured to issue a leakage fault indication in response to the ground fault signal.

22. The ground fault detection circuit breaker device according to claim 20, characterized in that: The ground fault detection circuit breaker device also includes a leakage self-detection unit, which is coupled to the driving unit and configured to periodically detect whether the ground fault signal processing unit functions normally and generate a leakage self-detection fault signal when the ground fault signal processing unit fails to function.

23. The ground fault detection circuit breaker device according to claim 20, characterized in that: The ground fault detection circuit breaker device further comprises an operating unit, which comprises at least a test button coupled to the switch to generate a simulated leakage signal and a reset button to restore the switch semiconductor to a cut-off state.

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