Low-voltage distribution device and method for controlling tripping of low-voltage distribution device

Abstract

The present disclosure relates to a method for a low-voltage power distribution device and a method for controlling a low-voltage power distribution device tripping. The low-voltage power distribution device comprising a detection unit configured to send a closed state signal to the control unit when the low-voltage power distribution device is in a closed state; and a control unit, which is coupled to the detection unit and configured to enable the low-voltage power distribution device to switch from the closed state to the open state for tripping upon receiving the closed state signal and satisfying the tripping condition. A method for controlling a low-voltage power distribution device tripping, wherein the method comprising: detecting whether the low-voltage power distribution device is in a closed state; detecting whether a tripping condition associated with the low-voltage power distribution device are satisfied; in response to the low-voltage power distribution device being in the closed state and the tripping condition being satisfied, causing the low-voltage power distribution device to perform a tripping action in order to enable the low-voltage power distribution device to switch from a closed state to an open state.

Description

Low voltage power distribution device and method for controlling tripping of low voltage power distribution device

[0001] Cross-reference to Related Applications

[0002] This application claims priority to Chinese Patent Application No. 201711086939.4, filed on November 7, 2017. TECHNICAL FIELD

[0003] The present disclosure relates to power distribution devices, and in one aspect, to low voltage power distribution devices. BACKGROUND

[0004] At present, various low voltage power distribution devices (also known as low voltage power distribution accessory products) such as leakage protection device, arc fault protection device, over / under voltage protection device, etc. are connected between the main power supply and the load circuit, which can bring various protections such as leakage protection, arc protection, over / under voltage protection to the main power supply or the load circuit, thereby ensuring the safe use of the main power supply or the load circuit. Some low voltage power distribution devices can provide one or more combined functions of the above-mentioned protection functions. Generally, the low voltage power distribution device has a closed state and an open state. In the closed state, the low voltage power distribution device connects the main power supply and the load circuit; in the open state, the low voltage power distribution device disconnects the connection between the main power supply and the load circuit. In the low voltage power distribution device, generally, there is a control circuit board. When a fault such as leakage, arc, and over / under voltage occurs, the control circuit board can control the tripping mechanism to generate a tripping action, so as to switch the low voltage power distribution device from the closed state to the open state, thereby avoiding the damage of the main power supply or the load caused by the above-mentioned fault.

[0005] Generally, the low voltage power distribution device adopts the wiring method of upper incoming line, that is, the incoming line connected to the main power supply is connected from the upper interface of the low voltage power distribution device, and the lower interface of the low voltage power distribution device is connected to the load circuit. At present, most of the low voltage power distribution devices are designed for the upper incoming line. Therefore, when the above-mentioned fault occurs in the circuit or the low voltage power distribution device, the low voltage power distribution device controls the tripping at the same time, and the power supply of the control circuit board is cut off at the same time. In order to meet the various needs of users, for example, due to various factors, the user may have to connect the main power supply and the load circuit in the way of lower incoming line, and various low voltage power distribution devices which can also be connected in the way of lower incoming line have been developed. Lower incoming line, as the name implies, means that the main power supply is connected to the lower interface of the low voltage power distribution device, and the load circuit is connected to the upper interface. However, because the internal circuit of the low voltage power distribution device is not adjusted accordingly, various problems occur when the low voltage power distribution device is connected in the way of lower incoming line.

[0006] SUMMARY

[0007] One aspect of the present disclosure provides a method for controlling tripping of a low-voltage power distribution device. The method includes detecting whether the low-voltage power distribution device is in an on state; detecting whether a tripping condition associated with tripping of the low-voltage power distribution device is satisfied; and in response to the low-voltage power distribution device being in the on state and the tripping condition being satisfied, causing the low-voltage power distribution device to perform a tripping action to switch the low-voltage power distribution device from the on state to an off state.

[0008] In some embodiments, the tripping condition includes at least one of overvoltage, undervoltage, short circuit, leakage, and arc fault.

[0009] In some embodiments, the method further includes in response to the tripping condition being satisfied, issuing an alarm signal to a user.

[0010] A second aspect of the present disclosure provides a low-voltage power distribution device. The low-voltage power distribution device includes a detection unit configured to issue an on state signal to a control unit if the low-voltage power distribution device is in an on state; and the control unit coupled to the detection unit and configured to cause the low-voltage power distribution device to switch from the on state to an off state to trip in response to receiving the on state signal and a tripping condition being satisfied.

[0011] In some embodiments, the low-voltage power distribution device further includes a power source configured to supply power to at least the detection unit; a communication assembly coupled to the detection unit and operable to communicate the detection unit with the power source in the on state.

[0012] In some embodiments, the communication assembly includes a first conductive contact coupled to the detection unit, a second conductive contact coupled to the power source, and a conductive member including a first contact portion coupled to the first conductive contact and a second contact portion capable of contacting the second conductive contact to connect the detection unit with the power source in the on state.

[0013] In some embodiments, the low-voltage power distribution device further includes a handle capable of being switched between an on position and an off position in response to an operation of a user to switch the low-voltage power distribution device between the on state and the off state; and a driving member pivotably disposed in the low-voltage power distribution device and operable to rotate from a first position to a second position in response to the handle being switched from the off position to the on position to cause the second contact portion to contact the second conductive contact.

[0014] In some embodiments, the conductive member further includes a third contact portion, and the low-voltage power distribution device further includes a test assembly including a test unit for testing effectiveness of the low-voltage power distribution device, a test contact coupled to the test unit, and a test button operable to drive the third contact portion to contact the test contact in response to a pressing of the test button by the user to connect the test unit with the power source with the second contact portion contacting the second conductive contact.

[0015] In some embodiments, the first, second, and test electrical contacts are electrically conductive pins disposed at different locations within the low voltage power distribution device.

[0016] In some embodiments, the electrically conductive component is a torsion spring, and the first contact portion is a helical portion of the torsion spring, the second contact portion is a first free end extending from the helical portion of the torsion spring, and the third contact portion is a second free end extending from the helical portion of the torsion spring.

[0017] Further features of the disclosure will become apparent with reference to the drawings and detailed description.

[0018] It should be understood that the disclosure is not intended to identify any key or critical elements of the embodiments of the disclosure or to delineate the scope of the disclosure. Other features of the disclosure will become apparent with the following description. BRIEF DESCRIPTION OF DRAWINGS

[0019] The above and other objects, features and advantages of embodiments of the disclosure will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings, in which:

[0020] FIG. 1 illustrates a structural diagram of a detection unit and a test assembly of a low voltage switchgear according to an exemplary embodiment of the disclosure;

[0021] FIG. 2 illustrates a side view of a low voltage switchgear in a closed state according to an exemplary embodiment of the disclosure;

[0022] FIG. 3 illustrates a side view of a low voltage switchgear in an open state according to an exemplary embodiment of the disclosure;

[0023] FIG. 4 illustrates an exploded perspective view of a portion of a low voltage switchgear according to an exemplary embodiment of the disclosure;

[0024] FIG. 5 illustrates an exploded perspective view of a portion of a low voltage switchgear according to an exemplary embodiment of the disclosure; and

[0025] FIG. 6 illustrates a flowchart of a method of controlling tripping of a low voltage power distribution device according to an exemplary embodiment of the disclosure. DETAILED DESCRIPTION

[0026] The principles of the present disclosure will now be described with reference to various example embodiments illustrated in the drawings. It is to be understood that the description of these embodiments is merely intended to provide a better understanding of the present disclosure and further enable its implementation by those skilled in the art. It should be noted that similar or identical reference numerals can be used in the figures where practicable and can indicate similar or identical functions. Those skilled in the art will readily recognize from the following description that alternative embodiments of the structures and methods illustrated herein can be employed without departing from the principles of the present disclosure described herein.

[0027] As used herein, the term "includes" and its variants are to be read to be analogous to an open term that means "comprising, but not limited to." The term "based on" is to be understood as "based, at least in part, on." The term "one embodiment" is to be understood as "at least one embodiment." The term "another embodiment" is to be understood as "at least one other embodiment."

[0028] Generally, a control circuit board is provided in low voltage distribution apparatuses. Detection modules on the control circuit board are able to detect faults such as leakage, arc, and under / over voltage, and send the detection results to a control unit in the form of electrical signals. The control unit determines, according to the signals, whether a tripping condition exists in the circuit that causes the low voltage distribution apparatus to trip, and then sends a tripping trigger signal to trigger the tripping mechanism to trip. In some low voltage distribution apparatuses, the detection modules can not be on the control circuit board, and can be powered by a separate power supply.

[0029] In some situations, particularly when a downfeed connection is used, problems arise because the low voltage distribution apparatus still uses the control circuit board and its connection method as when an upfeed connection is used. For example, because the downfeed connection is connected between the main power supply and the lower end of the low voltage distribution apparatus, when the above faults are detected, the control circuit board is able to control the tripping mechanism to trip, thereby disconnecting the main power supply from the load circuit. However, after tripping, i.e., when the low voltage distribution apparatus is in the open state, the control circuit board will remain live because the main power supply is connected from the lower end.

[0030] The control circuit board is able to perform its various existing functions while live, and the control unit will still send a tripping trigger signal to the tripping mechanism according to the tripping condition, and the tripping mechanism will perform a tripping action according to the signal. However, at this time, the low voltage distribution apparatus, which is still in the open state, will not respond to the tripping action, i.e., the tripping mechanism will always be idle in this case. This idle operation often leads to the tripping mechanism being burned out and other faults, thereby rendering the entire low voltage distribution apparatus unusable.

[0031] In view of this problem, some low-voltage power distribution devices disable the fault detection mechanism after the incoming line is adopted and after the tripping, so as to avoid the tripping mechanism from being burnt out. In this case, if the fault in the circuit has not been eliminated, the user can still complete the closing operation. Since the fault detection mechanism is disabled at this time, the control unit will not receive the fault signal sent by the fault detection mechanism, and thus will not send a tripping trigger signal. The tripping mechanism will not act accordingly, that is, in the case of a circuit fault, the circuit can still be in a connected state, and the low-voltage power distribution device will only use the flashing alarm light to warn the user that the fault still exists. Although this can protect the tripping mechanism and even the low-voltage power distribution device from being damaged, it may cause more serious problems, for example, the user may not notice the flashing alarm light and continue other work, which may cause damage to the load in the circuit and even threaten the safety of the user.

[0032] Embodiments of the present disclosure provide an improved low-voltage power distribution device 200 and a method of controlling the tripping of the low-voltage power distribution device 200 to solve or at least partially solve the above and other potential problems of conventional solutions.

[0033] The improvements of the low-voltage power distribution device 200 and the method of controlling the tripping of the low-voltage power distribution device 200 according to exemplary embodiments of the present disclosure will be described in detail below in conjunction with FIGS. 1-6. FIG. 1 shows a structural diagram of a detection unit and a test assembly of a low-voltage switch device according to exemplary embodiments of the present disclosure. The improved low-voltage power distribution device 200 will be introduced below in conjunction with FIG. 1.

[0034] Generally, the low-voltage power distribution device 200 of the present disclosure includes a detection unit 100 and a control unit 202. The detection unit 100 is provided in the low-voltage power distribution device 200 to send a closing state signal when the low-voltage power distribution device 200 is in a closing state. The closing state signal can be an electrical signal, or other types of digital or analog signals. The control unit 202 is coupled to the detection unit 100. It should be understood that the control unit 202 can be directly coupled to the detection unit 100, or can be coupled to the detection unit 100 through a filtering circuit or a modulation circuit. That is, the closing state signal of the detection unit 100 can be sent directly to the control unit 202, or can be sent to the control unit 202 after being filtered or modulated.

[0035] Upon receiving the closed state signal, if the tripping condition still exists in the circuit, the control unit 202 will control the low voltage power distribution device 200 to trip. It should be understood that the low voltage power distribution device according to the present disclosure will only trigger the tripping signal when both the control unit 202 receives the closed state signal and the tripping condition is satisfied. That is, in the open state, even if the tripping condition still exists, the control unit 202 will not trigger any signal and the tripping mechanism will not take any action because the control unit 202 does not detect or receive the closed state signal. Therefore, by setting the detection unit 100 to indicate the closed state, a closed loop control is added to the low voltage power distribution device 200, and the control unit 202 can have a clearer judgment on the state of the low voltage power distribution device 200, so as to avoid damage to the low voltage power distribution device 200 and the load and its circuit.

[0036] In some embodiments, the above functions can be implemented in the following way. The low voltage power distribution device 200 can further comprise a power supply 215 for at least powering the detection unit 100, and the detection unit 100 will only send the closed state signal when it is powered, i.e. connected to the power supply 215. In some embodiments, the power supply 215 can be a step-down module provided in the low voltage power distribution device 200. The step-down module provides power for the detection unit 100 by reducing the voltage of the main power supply. In some embodiments, the power supply 215 can also be a battery or the like.

[0037] The low voltage power distribution device 200 can further comprise a communication assembly 201, which can be coupled to the detection unit 100 and can be operated to connect the detection unit 100 to the power supply 215 when the low voltage power distribution device is in the closed state, so that the detection unit 100 will be powered to send the closed state signal.

[0038] Since the communication assembly 201 only connects the power supply 215 to the detection unit 100 in the closed state, so that the detection unit 100 sends the closed state signal to the control unit 202. After the low voltage power distribution device 200 trips, the connection between the detection unit 100 and the power supply 215 is disconnected. Therefore, at this time, the detection unit 100 cannot send the closed state signal because it is not powered. This achieves the detection of the closed state by the simple detection unit 100 and the communication assembly 201, and basically does not need to make any structural changes to the conventional low voltage power distribution device to achieve the above detection function, saving cost while improving the reliability of the low voltage power distribution device.

[0039] In some embodiments, the detection unit 100 can be a circuit as shown in FIG. 1. The circuit is capable of sending an electrical signal at the output end when the power supply 215 is turned on, and the control unit 202 confirms that the low-voltage power distribution device 200 is in the closed state after receiving the electrical signal. It should be understood that the detection unit 100 can also take any other form capable of sending a closed state signal when in communication with the power supply 215.

[0040] In some embodiments, the low-voltage power distribution device can also include a tripping mechanism (not shown). The control unit 202 completes the tripping action by sending a tripping trigger signal to the tripping mechanism. In some embodiments, the detection unit 100, the power supply 215, the communication assembly 201, the control unit 202, and the tripping mechanism can be provided on a control circuit board (not shown) in the low-voltage power distribution device. The control circuit board can be a monolithic circuit board, or it can be a split structure, with each module in a different split structure, to more accurately control each unit or module.

[0041] The details of the communication assembly 201 will be described below in conjunction with FIG. 1 and FIGS. 2-5. In some embodiments, as shown in FIG. 1, the communication assembly 201 includes two conductive contacts (for ease of description, referred to as a first conductive contact 203 and a second conductive contact 204) and a conductive component 205. The first conductive contact 203 is coupled to the detection unit 100, and the second conductive contact 204 is coupled to the power supply 215. A portion of the conductive component 205 (for ease of description, referred to as a first contact portion 206) is coupled to the first conductive contact 203, and another portion (for ease of description, referred to as a second contact portion 207) is operable to contact the second conductive contact 204 in the closed state, thereby connecting the detection unit 100 and the power supply 215.

[0042] How to make the second contact portion 207 contact the second conductive contact 204 to complete the conduction of the circuit in the closed state will be described below in conjunction with FIG. 2 and FIG. 3. FIG. 2 shows a side view of a low-voltage switch device in a closed state according to an exemplary embodiment of the present disclosure; FIG. 3 shows a side view of a low-voltage switch device in an open state according to an exemplary embodiment of the present disclosure. As can be seen from the figures, in some embodiments, the low-voltage power distribution device 200 can have a handle 208 and a driving component 209. The handle 208 is capable of switching between two positions (for ease of description, referred to as a closed position and an open position, respectively) in response to user operation. When the handle 208 is in the closed position, the low-voltage power distribution device 200 is in the closed state, and when the handle 208 is in the open position, the low-voltage power distribution device 200 is in the open state.

[0043] The driving member 209 is pivotally disposed in the low voltage distribution device 200. During the process of switching the handle from the open position in FIG. 3 to the closed position in FIG. 2, the driving member 209 is driven to rotate from the first position PI to the second position P2. During this process, the driving member 209 forces the second contact portion 207 to contact the second conductive contact 204, thereby completing the connection between the detection unit 100 and the power source 215 when the low voltage distribution device 200 is in the closed state.

[0044] As described above, the low voltage distribution device 200 is switched from the closed state to the open state by the tripping action to disconnect the main power source from the load circuit. It should be understood that the low voltage distribution device 200 can also be switched from the closed state to the open state by the handle 208. Regardless of whether the low voltage distribution device 200 is switched from the closed state to the open state due to the tripping action or the operation of the handle 208, the position of the handle 208 is correspondingly switched from the closed position to the open position. The driving member 209 is also correspondingly switched from the second position P2 back to the first position PI. At this time, the second contact portion 207 is no longer forced by the driving member 209 and is disconnected from the second conductive contact 204, thereby disconnecting the detection unit 100 from the power source 215.

[0045] In some embodiments, as shown in FIGS. 1, 2 and 3, the conductive member 205 can further include a third contact portion 213, and the low voltage distribution device 200 further includes a test assembly 210, which can test the effectiveness of the low voltage distribution device 200, for example. In some embodiments, the test assembly 210 includes a test unit 211, a test contact 212 and a test button 214. In some embodiments, the test unit 211 can be a circuit connected to the corresponding module to be tested. The test unit 211 is coupled to the test contact 212, and the test button 214 can drive the third contact portion 213 to contact the test contact 212 in response to the user's pressing, thereby enabling the test unit 211 to be connected to the power source 215 to supply power to the test unit 211 when the low voltage distribution device 200 is in the closed state, i.e., when the second contact portion 207 contacts the second conductive contact 204.

[0046] As shown in FIG. 1, the test unit 211 can be a circuit that performs a test function. It should be understood that the test unit 211 can also take any form that can perform a test function.

[0047] As shown in FIG. 4 and FIG. 5, in some embodiments, the first conductive contact 203, the second conductive contact 204, and the test contact 212 are conductive pin shafts disposed in the low voltage power distribution device. The adoption of the conductive pin shafts as the form of the three conductive contacts enables the conductive contacts to perform the conductive function while also serving as the fulcrum or pivot for the movement of certain components. The three conductive pin shafts, i.e., the first conductive contact 203, the second conductive contact 204, and the test contact 212, can be made of a metal material.

[0048] It should be understood that in some embodiments, the first conductive contact 203, the second conductive contact 204, or the test contact 212 can also not adopt the form of the conductive pin shaft, but can also adopt any other form of contact structure that can realize the conduction of the circuit, which is separately disposed in the low voltage power distribution device 200.

[0049] In some embodiments, as shown in FIG. 4, the conductive component 205 can be a torsion spring. The torsion spring generally has a spiral portion and at least two free ends (for the convenience of description, referred to as a first free end and a second free end) extending from the spiral portion. Among them, in some embodiments, the spiral portion of the torsion spring serves as the first contact portion 206, the second contact portion 207 can be the first free end, and the third contact portion 213 can be the second free end. Considering the needs of the structure in the low voltage power distribution device 200, the first free end and the second free end can have appropriate lengths and can be bent or deformed so that the torsion spring can adapt to the arrangement of the first conductive contact 203, the second conductive contact 204, and the test contact 212 in the low voltage power distribution device 200.

[0050] In some embodiments, the low voltage power distribution device 200 further includes an alarm unit (not shown). The alarm unit can issue a warning to the user in the case that the fault detection mechanism detects the existence of a tripping condition in the circuit. For example, the alarm unit can issue a light alarm, a sound alarm, or a combination of the two according to the tripping condition to warn the user that there is a fault in the circuit and that maintenance is needed as soon as possible.

[0051] The above describes in detail the improvement on the structure of the low voltage power distribution device in combination with FIG. 1 to FIG. 5. It is also important that in order to better solve some problems existing in the traditional low voltage power distribution device, the control logic of the control unit 202 also needs to be improved accordingly. This is reflected from the method of controlling the tripping of the low voltage power distribution device 200.

[0052] Referring to FIG. 6, a flowchart 600 of a method of controlling the tripping of a low voltage power distribution device according to an exemplary embodiment of the present disclosure is shown.

[0053] At block 601, it is detected whether the low-voltage power distribution device 200 is in the closed state. In some embodiments, the closed state can be detected by the detection unit 100 as described above, i.e., block 601 can be performed by the detection unit 100. The detection unit 100 sends the closed state information to the control unit 202 in the closed state. It should be understood that in some embodiments, block 601 can also be performed by any other component or unit capable of detecting the closed state.

[0054] At block 602, it is detected whether the tripping condition associated with the low-voltage power distribution device is met. In some embodiments, block 602 can be performed by the fault detection mechanism described above. The fault detection mechanism sends the tripping condition signal to the control unit 202 if it is detected that the tripping condition is met. In some embodiments, the content of block 602 can also be performed by the control unit 202.

[0055] It should be noted that although block 601 is described before block 602, it does not mean that the method can only be performed in the order of the described two blocks 601 and 602. For example, blocks 601 and 602 can be performed simultaneously, or the content of block 602 can be performed first, and then the content of block 601 can be performed.

[0056] At block 604, in response to the low-voltage power distribution device 200 being in the closed state and the tripping condition being met, the low-voltage power distribution device is caused to perform a tripping action to switch the low-voltage power distribution device from the closed state to the open state. In some embodiments, block 604 can be performed by the control unit 202 described above. In some embodiments, block 604 can cause the low-voltage power distribution device 200 to trip by sending a tripping trigger signal to the tripping mechanism by the control unit 202.

[0057] It can be seen that the method causes the tripping device to trip only when both the closed state and the tripping condition are met. This is equivalent to adding a closed-loop control to the control of the tripping. For example, in block 605, when the low-voltage power distribution device 200 is in the open state, the tripping action is not performed, so that the components related to the tripping action, such as the tripping mechanism, are not frequently empty-operated and burned out. At this time, in block 606, the control unit 202 is in standby state and does not trigger signals such as tripping signals.

[0058] In addition, if it is detected that the low-voltage power distribution device 200 is in the closed state when the tripping condition is met, the low-voltage power distribution device is also caused to trip from the closed state to the open state. This ensures the safety of the load circuit and even the low-voltage power distribution device 200.

[0059] In some embodiments, the above-described method can be applied to a low voltage power distribution device in a closed wiring state. Of course, it should be understood that the method can also be applied to any other low voltage power distribution device that needs to detect a closed state. In some embodiments, the above-mentioned tripping condition can include, but is not limited to, at least one of overvoltage, undervoltage, short circuit, leakage and arc fault of the circuit.

[0060] In some embodiments, for example at block 603, an alarm signal is issued to a user in response to the tripping condition being satisfied. The user can maintain the circuit or the low voltage power distribution device according to the alarm signal, so as to eliminate the fault that triggers the tripping condition to be satisfied. This further ensures the safe use of the low voltage power distribution device 200.

[0061] Although some specific embodiments of the present disclosure have been shown and described in detail by way of examples, it will be appreciated that the examples are intended to be illustrative only and not limiting of the scope of the present disclosure. Those skilled in the art should appreciate that the above-described embodiments can be modified without departing from the scope and spirit of the present disclosure. The scope of the present disclosure is defined by the appended claims.

[0062] In the specification and the following claims, the terms "include" and "comprise" are understood to include the stated components or groups of components but not to exclude any other components or groups of components.

[0063] Any reference in this specification to any prior art is not, and should not be taken as, an acknowledgement or any form of suggestion that this prior art forms part of the common general knowledge.

[0064] It should be understood that the following claims are only provisional claims and are examples of possible claims, and are not intended to limit the scope of the claims based on any future patent application of this application. Components can be added or deleted from the example claims in the future to further define or redefine the present disclosure.

Claims

1. A method (600) for controlling the tripping of a low-voltage power distribution unit (200), wherein the method comprises: Detect (601) whether the low-voltage power distribution device (200) is in the closed state; Detect (602) whether the tripping conditions associated with the low-voltage power distribution unit (200) are met; In response to the low-voltage power distribution device (200) being in the closed state and the tripping condition being met, the low-voltage power distribution device (200) performs a tripping action (604) to switch the low-voltage power distribution device (200) from the closed state to the open state.

2. The method according to claim 1, wherein the tripping condition includes at least one of overvoltage, undervoltage, short circuit, leakage current and arc fault.

3. The method according to claim 1, further comprising: In response to the tripping condition being met, an alarm signal (603) is sent to the user.

4. A low-voltage power distribution device (200), characterized in that, The low-voltage power distribution device (200) includes: The detection unit (100) is configured to send a closing status signal to the control unit (202) when the low-voltage power distribution device (200) is in the closed state; and The control unit (202), coupled to the detection unit (100), is configured to switch the low-voltage distribution device (200) from the closed state to the open state for tripping upon receiving the closed state signal and meeting the tripping conditions.

5. The low-voltage power distribution device (200) according to claim 4, characterized in that, Also includes: The power supply (215) is configured to supply power to at least the detection unit (100); A connecting component (201), coupled to the detection unit (100), is operable to connect the detection unit (100) to the power supply (215) in the closed state.

6. The low-voltage power distribution device (200) according to claim 5, characterized in that, The connectivity component (201) includes: The first conductive contact (203) is coupled to the detection unit (100). The second conductive contact (204) is coupled to the power supply (215), and The conductive component (205) includes a first contact portion (206) and a second contact portion (207). The first contact portion (206) is coupled to the first conductive contact (203), and the second contact portion (207) is capable of contacting the second conductive contact (204) in the closed state to connect the detection unit (100) to the power supply (215).

7. The low-voltage power distribution device (200) according to claim 5, characterized in that, Also includes: The handle (208) is capable of switching between a closed position and an open position in response to a user's operation, thereby switching the low-voltage power distribution device (200) between the closed state and the open state; as well as A drive component (209) is pivotally disposed in the low-voltage power distribution unit (200) and operable to rotate from a first position (P1) to a second position (P2) in response to the handle (208) switching from the open position to the closed position, so that the second contact portion (207) contacts the second conductive contact (204).

8. The low-voltage power distribution device (200) according to claim 5, characterized in that, The conductive component (205) further includes a third contact portion (213), and the low-voltage power distribution device (200) further includes a test assembly (210), the test assembly (210) comprising: Test unit (211) is used to test the effectiveness of low-voltage power distribution equipment (200); Test contact (212), coupled to the test unit (211); and The test button (214) responds to the user's press and drives the third contact portion (213) to contact the test contact (212), thereby connecting the test unit (211) to the power supply (215) when the second contact portion (207) contacts the second conductive contact (204).

9. The low-voltage power distribution device (200) according to claim 8, characterized in that, The first conductive contact (203), the second conductive contact (204), and the test contact (212) are conductive pins located at different positions within the low-voltage power distribution device (200).

10. The low-voltage power distribution device (200) according to claim 9, characterized in that, The conductive component (205) is a torsion spring, and the first contact portion (206) is the helical portion of the torsion spring, the second contact portion (207) is a first free end extending from the helical portion of the torsion spring, and the third contact portion (213) is a second free end extending from the helical portion of the torsion spring.

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