Abnormality detection breaker and distribution board

Abstract

To provide an abnormality detection breaker capable of checking the detection status of abnormal conditions at any time, and a distribution board.SOLUTION: An abnormality detection breaker 4 is connected to a power supply path C11 included in an electrical circuit C1 and includes a detection unit 41, a contact 43, an abnormality presentation unit 451, and a recording unit 44. The detection unit 41 performs a series of detection processing to detect an abnormal condition. The contact 43 is able to perform conduction and disconnection of the electrical connection between a main circuit C2 and the electrical circuit C1, and when the detection unit 41 detects an abnormal condition, disconnects the electrical connection. The abnormality presentation unit 451 presents the abnormal condition. The recording unit 44 stores the record of the abnormal conditions detected by the detection unit 41.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates generally to an abnormality detection breaker and a distribution board, and more particularly to an abnormality detection breaker and a distribution board that detects an abnormal state of an electric circuit connected to the breaker. [Background technology]

[0002] Patent Document 1 discloses a circuit breaker. This circuit breaker includes an opening mechanism and an arc detection circuit. The opening mechanism breaks an electric path connecting a power source and a load. The arc detection circuit detects an arc short circuit occurring in the electric path and activates the opening mechanism. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2003-317598 A Summary of the Invention [Problem to be solved by the invention]

[0004] The arc detection breaker described in Patent Document 1 has a problem in that the detection status of the abnormal state cannot be confirmed after the arc detection breaker is restored.

[0005] An object of the present disclosure is to provide an abnormality detection breaker and a distribution board that can check the detection status of an abnormal state at any timing. [Means for solving the problem]

[0006] An abnormality detection breaker according to one aspect of the present disclosure is connected to a power supply line included in an electric circuit, and includes a detection unit, a contact, an abnormality presentation unit, and a recording unit. The detection unit performs a detection process to detect an abnormal state of the electric circuit. The contact can make and break an electrical connection between a main electric line that supplies power to the electric circuit and the electric circuit, and when the detection unit detects the abnormal state, the electrical connection is cut off. The abnormality presentation unit presents the abnormal state detected by the detection unit. The recording unit stores a history of the abnormal states detected by the detection unit. The history of the abnormal condition includes at least one of the number of occurrences of the abnormal condition that occurred in the past, the time of detection, and the duration of the occurrence.

[0007] A distribution board according to an aspect of the present disclosure includes the abnormality detection breaker and a housing that houses the abnormality detection breaker. Effect of the Invention

[0008] The present disclosure has the advantage that the detection status of an abnormal state can be confirmed at any time. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is an explanatory diagram showing a schematic configuration of a distribution board including an abnormality detection breaker according to an embodiment of the present disclosure. [Diagram 2] FIG. 2 is a block diagram showing a schematic configuration of the abnormality detection breaker of the above embodiment. [Diagram 3] 3A and 3B are explanatory diagrams of the principle of parallel arc generation and the principle of series arc generation, respectively. [Figure 4] FIG. 4 is a plan view of the abnormality detection breaker as viewed from the front. [Diagram 5] FIG. 5 is a flowchart showing the operation from detection of an abnormal state to recovery in the abnormality detection breaker of the above embodiment. [Figure 6] FIG. 6 is a flowchart showing an operation of the abnormality detection breaker of the above embodiment to present the number of occurrences of an abnormal state. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] (Embodiment) (1) Overview 1, the abnormality detection breaker 4 according to this embodiment is housed in the distribution board 1 and corresponds to a branch breaker of the distribution board 1. The abnormality detection breaker 4 is used to detect an abnormal state of the electric circuit C1 including the power supply line C11, and to cut off the electric path leading to the electric circuit C1 when an abnormality is detected. The distribution board 1 according to this embodiment includes the abnormality detection breaker 4 which is a branch breaker, a main breaker 3, and a housing 10 which houses the abnormality detection breaker 4 and the main breaker 3.

[0011] 2, the abnormality detection breaker 4 of this embodiment includes a detection unit 41, a contact 43, a recording unit 44, and an abnormality display unit 451. The detection unit 41 detects an abnormal state of the electric circuit C1.

[0012] The abnormal state in the present disclosure may include abnormalities such as insulation deterioration or partial disconnection in the wiring of the electric circuit C1. In the present disclosure, "partial disconnection" means a state in which a wire is about to be disconnected, and specifically, if the wiring of the electric circuit C1 is a stranded wire, it is a state in which some of the wires constituting the stranded wire are disconnected. As an example, the abnormal state may include a state in which, when the electric circuit C1 is composed of a pair of electric wires C10, both of the pair of electric wires C10 are short-circuited to generate an arc (so-called parallel arc). In addition, as an example, the abnormal state may include a state in which, when the electric circuit C1 is composed of a pair of electric wires C10, one of the pair of electric wires C10 is partially disconnected to generate an arc (so-called series arc).

[0013] The abnormality detection breaker 4 of this embodiment further includes a control unit 42. In general, when the detection unit 41 in the abnormality detection breaker 4 detects an abnormal state, the control unit 42 cuts off the electrical connection between the main electric circuit C2, which supplies power to the electric circuit C1, and the electric circuit C1 at the contact 43 in the abnormality detection breaker 4, so that no current flows through the electric circuit C1. Thereafter, the person who operates the abnormality detection breaker 4 (hereinafter, referred to as the user) restores the abnormality detection breaker 4 to restore the electrical connection between the main electric circuit C2 and the electric circuit C1. In this embodiment, there is a recording unit 44 that stores the history of the abnormal state, and the user can check the history of the abnormal state at any time.

[0014] (2)Details The abnormality detection breaker 4 or the distribution board 1 including the abnormality detection breaker 4 in this embodiment will be described in detail below with reference to FIGS.

[0015] The distribution board 1 is installed and used in a facility 500 such as a dwelling unit of a detached house or an apartment building. The facility 500 in which the distribution board 1 is installed is not limited to each dwelling unit of a detached house or an apartment building, and may be installed in a non-residential building (for example, a factory, a commercial building, an office building, a hospital, a school, etc.).

[0016] (2.1) Abnormality detection breaker 2, the abnormality detection breaker 4 of this embodiment includes a first terminal 461 and a second terminal 462. The first terminal 461 is located upstream of the contact 43 and is electrically connected to the main electric circuit C2. On the other hand, the second terminal 462 is located downstream of the contact 43 and is electrically connected to the power supply line C11 included in the electric circuit C1. One or more loads are connected to the electric circuit C1, such as an electric device 22, a lighting fixture, a hot water supply facility, etc., an outlet 21, or an electric device 22 connected to the outlet 21 (e.g., an air conditioner or a television receiver, etc.) (see FIG. 1).

[0017] The current measuring device 47 measures the current flowing between the first terminal 461 and the second terminal 462. Then, the detection unit 41 detects an abnormal state based on the measured current. In this embodiment, the abnormal state may include a state in which an arc occurs in the electric circuit C1. For example, the detection unit 41 is a device that can recognize current characteristics and voltage characteristics specific to an arc fault occurring in the electric circuit C1, such as an arc fault circuit interrupter (AFCI), and detect an arc fault occurring in the electric circuit C1. The detection unit 41 may also be a system that can detect an arc fault occurring in the electric circuit C1 by determining whether or not the waveform of the current measured by the current measuring device 47 includes an individual waveform at the time of abnormality occurrence.

[0018] In this embodiment, the abnormal state of the electric circuit C1 includes the occurrence of a parallel arc and the occurrence of a series arc, as described above. As shown in FIG. 3, a parallel arc can occur when the conductors of a pair of electric wires C10 constituting the wiring of the electric circuit C1 come into contact with each other and short-circuit. The dotted arrows in FIG. 3 indicate the path of the current flowing through the wiring of the electric circuit C1 when a parallel arc occurs. The magnitude of the current flowing through the wiring when a parallel arc occurs is, for example, several tens [A] to several hundreds [A]. A parallel arc can occur, for example, when the wiring gets caught on an edge of an object (for example, furniture, etc.) in the facility, damaging the coating C12, or when the wiring is pinched by a metal member such as a staple. A parallel arc can also occur, for example, when an overcurrent flows through the wiring and melts the coating C12, or when an animal bites the wiring of the electric circuit C1. A parallel arc can also occur when the wiring deteriorates due to long-term exposure to ultraviolet rays. Therefore, there is a risk of arc faults occurring in any wiring, regardless of the surrounding environment of the wiring or the connected electric device 22. Therefore, as shown in Figure 1, the abnormality detection breaker 4 is often installed in all electric circuits C1.

[0019] Furthermore, the control unit 42 controls the operation, calculation, reading / writing, input / output, etc. of each part of the abnormality detection breaker 4. As an example, it opens the contacts 43 based on the detection result by the detection unit 41, reads out the history of abnormal conditions stored in the recording unit 44, and presents the presence or absence of an abnormal condition by the abnormality presentation unit 451. In this embodiment, for example, it is a processor such as a CPU (Central Processing Unit) or an MPU (Micro Processing Unit).

[0020] The abnormality detection breaker 4 includes a contact 43 electrically connected between a first terminal 461 and a second terminal 462. The electrical connection between the main electric line C2 and the electric circuit C1 can be interrupted or conducted by opening and closing the contact 43. When the detection unit 41 detects an abnormal state of the electric circuit C1, the control unit 42 opens the contact 43 to interrupt the electrical connection between the main electric line C2 and the electric circuit C1, and cuts off the power supply to the electric circuit C1 in which the abnormal state has occurred.

[0021] Moreover, the abnormality detection breaker 4 further includes a handle 481 linked to the contact 43. The contact 43 is opened or closed when the handle 481 is operated by a user. Specifically, when the user operates the handle 481 to the ON position, the contact 43 is closed and conductive, and when the user operates the handle 481 to the OFF position, the contact 43 is opened and cut off.

[0022] When the detection unit 41 detects an abnormal state and the control unit 42 opens the contacts 43 to cut off the electrical connection between the main electric line C2 and the electric circuit C1, the handle 481 moves to a position intermediate between on and off (hereinafter referred to as the trip position). If the user subsequently restores the tripped abnormality detection breaker 4, a restoration operation is required to move the handle 481 to the on position.

[0023] The control unit 42 causes the abnormality presentation unit 451 to present the presence or absence of an abnormal state to the user based on the detection result of the detection unit 41. In this embodiment, when the detection unit 41 detects an abnormal state and the control unit 42 cuts off the electrical connection at the contacts 43, the handle 481 is moved to the trip position by the control unit 42. Thus, the abnormality presentation unit 451 presents the result of the abnormality detection to the user.

[0024] The control unit 42 also stores the history of the abnormal state in the detection unit 41 in the recording unit 44. The recording unit 44 of the present disclosure is, for example, a storage device such as a magnetic core memory or a semiconductor memory. The recording unit 44 may also be an auxiliary storage device such as an SSD (Solid State Drive) or an HDD (Hard Disk Drive). The history of the abnormal state includes, for example, the number of times the abnormal state has occurred, the time of detection, the duration, and the like.

[0025] The abnormality detection breaker 4 of this embodiment further includes a history presentation unit 452. The control unit 42 reads out data on the history of abnormal conditions from the recording unit 44. After that, the history presentation unit 452, which has received the data on the history of abnormal conditions from the control unit 42, presents the history of abnormal conditions to the user. Furthermore, the history of abnormal conditions stored in the recording unit 44 is not deleted even if the user performs recovery work on the abnormality detection breaker 4, but is maintained in the state stored in the recording unit 44. Therefore, the history presentation unit 452 can present the history of abnormal conditions even after recovery work has been performed. The user can then check the history of abnormal conditions at any time.

[0026] In addition, in this embodiment, the history presentation unit 452 visually presents the history of the abnormal state to the user. The history presentation unit 452 includes a light-emitting element, which visually presents the history of the abnormal state to the user. The light-emitting element is, for example, an LED (Light Emitting Diode). The history presentation unit 452 can present the number of occurrences of the abnormal state by the number of times the light-emitting element blinks. In FIG. 4, the history presentation unit 452 is disposed above the handle 481 of the abnormality detection breaker 4. Note that the position of the history presentation unit 452 may be another position, such as below the handle 481. Also, a light-emitting element may be provided inside the handle 481, and the number of occurrences of the abnormal state may be presented by the blinking of the light-emitting element.

[0027] Alternatively, the history presentation unit 452 may be provided with an audio device such as a speaker, and may audibly present the number of occurrences of the abnormal state to the user by sounding a sound in the surroundings. The sound may be, for example, a beep sound that is repeatedly played. Specifically, the number of occurrences of the abnormal state is presented by the number of times that the short beep sound is repeated. Alternatively, the number of occurrences of the abnormal state may be presented by reading out the number of occurrences of the abnormal state as text using an artificially created synthetic voice. In this embodiment, visual presentation and auditory presentation can be achieved at the same time. As an example, when the history presentation unit 452 is provided with a light-emitting element and a speaker, the number of occurrences of the abnormal state can be simultaneously presented to the user visually and auditorily by sounding a beep sound in synchronization with the timing of the light-emitting element blinking.

[0028] The detection unit 41 of this embodiment includes a detection circuit 411 and a diagnostic circuit 412. The detection circuit 411 performs a detection process to detect an abnormal state of the electric circuit C1. The diagnostic circuit 412 performs a diagnostic process to diagnose whether the detection process of the abnormal state by the detection circuit 411 is normally performed. The abnormality detection breaker 4 of this embodiment further includes a diagnostic operation button 482 as shown in FIG. 2 or FIG. 4. When the diagnostic operation button 482 is operated, a signal is transmitted from the diagnostic operation button 482 to the control unit 42, and the control unit 42 causes the diagnostic circuit 412 to start the diagnostic process. In FIG. 4, the diagnostic operation button 482 is disposed below the handle 481 of the abnormality detection breaker 4. The position of the diagnostic operation button 482 may be another position, for example, above the handle 481.

[0029] The abnormality detection breaker 4 further includes a diagnosis result presentation unit 453, and the control unit 42 causes the diagnosis result presentation unit 453 to present the result of the diagnostic process. The history presentation unit 452 of this embodiment also serves as the diagnostic result presentation unit 453. As an example, in the case where the history presentation unit 452 is configured with a light-emitting element, when the detection circuit 411 is diagnosed as normal by the diagnostic circuit 412, the light-emitting element of the history presentation unit 452 lights up in green. On the other hand, when the detection circuit 411 is diagnosed as abnormal, the light-emitting element lights up in red, and the result of the diagnostic process is presented to the user.

[0030] The abnormality detection breaker 4 further includes an operation unit 48 that accepts an operation for starting presentation in the history presentation unit 452 or changing the contents of presentation. The control unit 42 controls the history presentation unit 452 based on the operation of the operation unit 48. In this embodiment, the operation unit 48 is composed of a handle 481 and a diagnosis operation button 482. As an example, when only the diagnosis operation button 482 is operated, a diagnosis is started, and when the detection circuit 411 is diagnosed as normal, the light-emitting element of the history presentation unit 452 lights up in green. On the other hand, when the detection circuit 411 is diagnosed as abnormal, the light-emitting element lights up in red, and the result of the diagnosis process is presented to the user. Thereafter, when the handle 481 is changed to the on position or the off position while pressing the diagnosis operation button 482, the light-emitting element of the history presentation unit 452 flashes the same number of times as the number of occurrences of the abnormal state. Thus, the number of occurrences of the abnormal state that occurred in the electric circuit C1 is presented to the user.

[0031] The abnormality detection breaker 4 of this embodiment further includes a communication unit 49. The communication unit 49 is capable of communicating with an external system. The external system here is, for example, a monitor compatible with a Home Energy Management System (HEMS) or an information terminal. The information terminal is, for example, a terminal carried by a user, and specifically, a smartphone or a tablet computer. The information terminal may also be, for example, a desktop or laptop personal computer.

[0032] The communication method between the communication unit 49 and the external system is, for example, wireless communication using radio waves as a medium, conforming to a communication standard such as a specific low-power radio station (a radio station not requiring a license) in the 920 MHz band, Wi-Fi (registered trademark), or Bluetooth (registered trademark). The communication method between the communication unit 49 and the external system may be wired communication conforming to a communication standard such as a wired LAN (Local Area Network). Furthermore, the communication protocol used in the communication between the communication unit 49 and the external system is, for example, Ethernet (registered trademark), ECHONET Lite (registered trademark), or the like. Furthermore, the communication unit 49 may communicate with the external system via a wide area network such as the Internet.

[0033] The control unit 42 reads out the abnormal condition history from the recording unit 44, and causes the communication unit 49 to transmit it to an external system. Specifically, when the communication unit 49 receives a request for information on the abnormal condition history from the information terminal, the control unit 42 reads out the abnormal condition history (the number of times the abnormal condition has occurred, the time when the abnormal condition was detected, and the period during which the detection of the abnormal condition continued) from the recording unit 44. Thereafter, the control unit 42 causes the communication unit 49 to transmit a signal including the abnormal condition history to the information terminal. The user can check the abnormal condition history by operating the information terminal, for example, by viewing emails or starting an application installed on the information terminal.

[0034] The above-mentioned abnormality detection breaker 4 can present the history of abnormal conditions to the user at any time. Therefore, the user can check the detection status of an abnormal condition at any time.

[0035] (3) Operation (3.1) From detection of abnormality to recovery The operation from detection of an abnormal state to recovery in this embodiment will be described below with reference to FIG.

[0036] First, the detection unit 41 acquires information on the current measured by the current measuring device 47 (S11). Then, the detection unit 41 determines whether or not an abnormal state has occurred in the electric circuit C1 based on the acquired current information (S12).

[0037] When an abnormal state is detected (S12: YES), the control unit 42 opens the contacts 43 and cuts off the electrical connection between the main electric line C2 and the electric circuit C1 (S13). After that, the control unit 42 stores the history of the abnormal state in the recording unit 44 (S15), and then the control unit 42 moves the handle 481, which is the abnormality presenting unit 451, to the trip position, thereby presenting the occurrence of the abnormal state to the user (S14).

[0038] Thereafter, the user moves the handle 481 to the ON position (S16) in order to use the electric device 22 again, etc. Then, the contact 43 is closed, and the electrical connection between the main electric line C2 and the electric circuit C1 is established. The power supply to the electric device 22 is restored (S17). At this time, the history of the abnormal state stored in the recording unit 44 is not deleted.

[0039] (3.2) Displaying abnormality history Hereinafter, the operation of presenting the number of occurrences of abnormal states in this embodiment will be described with reference to FIG.

[0040] To start presentation by the history presentation unit 452 or to change the contents of presentation, it is necessary to perform an operation of changing the handle 481 to the ON position or OFF position while pressing the diagnosis operation button 482. First, the control unit 42 checks whether an operation to start presentation or change the contents of presentation has been performed (S21). When the control unit 42 checks the above operation (S21: YES), the control unit 42 reads data on the number of times that abnormal conditions have occurred from the recording unit 44 (S22). Then, the control unit 42 lights up the light-emitting element of the history presentation unit 452 the same number of times as the number of times that abnormal conditions have occurred, and presents the history of abnormal conditions to the user (S23).

[0041] (3.3) Advantages of this embodiment As described in (3.1) and (3.2), in this embodiment, when the detection unit 41 detects an abnormal condition, the control unit 42 stores the history of the abnormal condition in the recording unit 44. Then, by performing an operation to start presentation or change the content of presentation on the operation unit 48, the history presentation unit 452 presents the history of the abnormal condition. Therefore, this embodiment has the advantage that the history of the abnormal condition of the abnormality detection breaker 4 can be checked at any timing.

[0042] The advantages of this embodiment will be described below with a comparison with an anomaly detection breaker of a comparative example. The anomaly detection breaker of the comparative example does not have a recording unit 44, and differs from the anomaly detection breaker 4 of this embodiment in that it stores history data of detected abnormal conditions. The anomaly detection breaker of the comparative example does not keep a history of detected abnormal conditions, so the history of abnormal conditions can only be checked immediately before recovery, and there is a problem in that the user cannot check the history of abnormal conditions at any time.

[0043] On the other hand, in this embodiment, since the abnormality detection breaker 4 is provided with the recording unit 44, it is possible to store the history of the abnormal state. Therefore, for example, even if time has passed since the recovery work, or if a user other than the user who performed the recovery work checks, it is possible to check the history of the abnormal state.

[0044] (4) Variations The above-described embodiment is merely one of various embodiments of the present disclosure. The above-described embodiment can be modified in various ways depending on the design and the like as long as the object of the present disclosure can be achieved.

[0045] In the above-described embodiment, the history presentation unit 452 may be any device capable of presenting the history of an abnormal state, and may be, for example, a liquid crystal display, an organic electroluminescence (EL) display, a fluorescent display tube, or the like. In this case, the history presentation unit 452 may also function as the abnormality presentation unit 451. At the same time, the history presentation unit 452 may also function as the diagnosis result presentation unit 453. As an example, when the history presentation unit 452 is configured as a display, the contents presented on the display can be switched by operating the operation unit 48, and the abnormal state detected by the detection unit 41 and the results of the diagnosis process can be presented.

[0046] Furthermore, when the history presentation unit 452 is a liquid crystal display or the like that is capable of presenting multiple pieces of information simultaneously on one screen, instead of switching the content presented by the history presentation unit 452, multiple pieces of information such as the number of times an abnormal state has occurred or the results of a diagnostic process may be presented simultaneously.

[0047] Furthermore, in the above-described embodiment, if the history presentation unit 452 is a liquid crystal display or the like capable of presenting detailed information, the history presentation unit 452 may present the detection time of the abnormal condition as the history of the abnormal condition. For example, if a plurality of abnormality detection breakers 4 are mounted on the distribution board 1, when an abnormality detection breaker 4 is restored after being tripped due to an abnormality detection, there is a problem in that it is not possible to identify which abnormality detection breaker 4 was tripped most recently. However, by the user checking the detection time of the abnormal condition, it becomes possible to identify the abnormality detection breaker 4 that was tripped most recently.

[0048] The abnormality detection breaker 4 according to one embodiment may further include a handle state presenting unit 454. The handle state presenting unit 454 presents whether the handle 481 is in the on position, the off position, or the trip position. In this embodiment, the history presenting unit 452 also serves as the handle state presenting unit 454. Specifically, when the history presenting unit 452 includes a display, the contents presented on the display are switched in order by operating the operation unit 48 between the number of occurrences of abnormal states, the results of the diagnosis process, and the handle state.

[0049] In the above embodiment, the recording unit 44 does not need to store data on the number of times an abnormal condition has occurred as a history of the abnormal condition. If the recording unit 44 does not have data on the number of times an abnormal condition has occurred, the control unit 42 calculates the number of times an abnormal condition has occurred based on data (such as the time when an abnormal condition was detected) that the recording unit 44 has as a history of abnormality occurrence. Then, the history presentation unit 452 presents the number of times an abnormal condition has occurred.

[0050] The control unit 42 preferably includes a computer system. In the computer system, a processor such as a CPU (Central Processing Unit) or an MPU (Micro Processing Unit) reads and executes a program stored in a memory, thereby realizing some or all of the functions of the control unit 42. The computer system includes a processor that operates according to a program as a main hardware configuration. The type of processor is not important as long as it can realize the function by executing the program. The processor is composed of one or more electronic circuits including a semiconductor integrated circuit (IC) or an LSI (large scale integration). Although IC and LSI are referred to here, the name may change depending on the degree of integration, and may be called a system LSI, VLSI (very large scale integration), or ULSI (ultra large scale integration). A field programmable gate array (FPGA), which is programmed after the manufacture of the LSI, or a reconfigurable logic device that can reconfigure the connection relationship inside the LSI or set up the circuit partition inside the LSI, can also be used for the same purpose. A plurality of electronic circuits may be integrated into one chip, or may be provided on multiple chips. The multiple chips may be integrated into one device, or may be provided in multiple devices.

[0051] (summary) As described above, the abnormality detection breaker (4) according to the first embodiment is connected to the power supply line (C11) included in the electric circuit (C1), and includes the detection unit (41), the contacts (43), the abnormality display unit (451), and the recording unit (44). The detection unit (41) performs a detection process to detect an abnormal state of the electric circuit (C1). The contacts (43) can make and break an electrical connection between the main electric line (C2) that supplies power to the electric circuit (C1) and the electric circuit (C1), and when the detection unit (41) detects an abnormal state, it cuts off the electrical connection. The abnormality display unit (451) displays the abnormal state detected by the detection unit (41). The recording unit (44) stores a history of the abnormal states detected by the detection unit (41).

[0052] This aspect has the advantage that the history of abnormal conditions can be checked at any time.

[0053] In the abnormality detection breaker (4) according to the second aspect, in the first aspect, the abnormal state is a state in which an arc occurs in the electric circuit (C1).

[0054] This aspect has the advantage that it is possible to check the history of the state in which an arc has occurred at any desired timing.

[0055] The abnormality detection breaker (4) according to the third aspect is the first or second aspect, further comprising a history presentation unit (452) that presents the history of the abnormal state.

[0056] According to this embodiment, there is an advantage that the user can receive detailed information and can easily check the history of abnormal conditions.

[0057] In the abnormality detection breaker (4) according to the fourth aspect, in the third aspect, the history presentation unit (452) visually presents the history of the abnormal state.

[0058] According to this aspect, for example, there is an advantage that the user can read the displayed information and can easily check the history of the abnormal state.

[0059] In the abnormality detection breaker (4) according to the fifth aspect, in the fourth aspect, the history presenting section (452) is composed of a light-emitting element, and the light-emitting element visually presents the history of the abnormal state.

[0060] According to this aspect, for example, there is an advantage that the user can check the number of occurrences of abnormal conditions included in the history of abnormal conditions by causing the light-emitting element of the history presentation unit (452) to flash the same number of times as the number of occurrences of abnormal conditions.

[0061] In the abnormality detection breaker (4) according to a sixth aspect, in any one of the third to fifth aspects, the history presentation unit (452) audibly presents the history of the abnormal state.

[0062] This aspect has the advantage that the user can indicate the number of times an abnormal state has occurred by, for example, the number of times a short beep is repeated.

[0063] In the abnormality detection breaker (4) according to the seventh aspect, in any one of the third to sixth aspects, the history presentation section (452) also serves as the abnormality presentation section (451).

[0064] According to this embodiment, the history presentation unit (452) can present not only the history of abnormal conditions but also the presence or absence of an abnormal condition detected by the detection unit (41), which has the advantage of simplifying the structure of the abnormality detection breaker (4).

[0065] In the abnormality detection breaker (4) according to an eighth aspect, in any one of the third to seventh aspects, the detection unit (41) includes a detection circuit (411) and a diagnostic circuit (412). The diagnostic circuit (412) performs diagnostic processing to diagnose whether the detection circuit (411) can normally execute the detection processing. The abnormality detection breaker (4) of this aspect further includes a diagnostic result presentation unit (453) that presents a result of the diagnostic processing, and the history presentation unit (452) also serves as a handle state presentation unit (454).

[0066] According to this embodiment, the history presentation unit (452) can present not only the history of abnormal conditions but also the results of diagnostic processing, which has the advantage of simplifying the structure of the abnormality detection breaker (4).

[0067] The abnormality detection breaker (4) according to the ninth aspect is the same as that of the eighth aspect, and further includes a handle (481) that switches between conduction and interruption of an electrical connection by the contacts (43) by operation, and a handle state presentation unit (454) that presents a state of the handle (481). The history presentation unit (452) also serves as the handle state presentation unit (454).

[0068] According to this embodiment, the history display unit (452) can display not only the history of abnormal conditions but also the state of the handle (481), which has the advantage of simplifying the structure of the abnormality detection breaker (4).

[0069] The abnormality detection breaker (4) according to a tenth aspect is the same as the eighth or ninth aspect, and further includes a handle (481), a diagnosis operation button (482), and an operation unit (48). The handle (481) switches between conduction and interruption of the electrical connection by the contacts (43) when operated. The diagnosis operation button (482) accepts an operation for diagnostic processing. The operation unit (48) accepts an operation for starting presentation in the history presentation unit (452) or changing the content of the presentation. Furthermore, the operation unit (48) is composed of the handle (481) and the diagnosis operation button (482).

[0070] According to this aspect, by utilizing the existing handle (481) or the diagnosis operation button (482) as the operation unit (48), there is an advantage that it is possible to start presentation in the history presentation unit (452) or change the contents of presentation without providing a new dedicated operation unit (48) in the abnormality detection breaker (4).

[0071] The abnormality detection breaker (4) according to an eleventh aspect is any one of the first to tenth aspects, further including a communication unit (49) capable of communicating with an external system. The communication unit (49) transmits the history of the abnormal state stored in the recording unit (44) to the external system.

[0072] According to this aspect, for example, there is an advantage that the user can check the history of abnormal conditions on a terminal carried by the user.

[0073] A distribution board (1) according to a twelfth aspect includes the abnormality detection breaker (4) according to any one of the first to eleventh aspects and a housing (10). The housing (10) houses the abnormality detection breaker (4).

[0074] According to this aspect, for example, it is possible to provide a distribution board (1) equipped with an abnormality detection breaker (4) that can check the history of an abnormal state at any time.

[0075] The configurations according to the second to twelfth aspects are not essential for the abnormality detection breaker (4) and may be omitted as appropriate. [Explanation of symbols]

[0076] 1 Distribution board 10. Chassis 4. Abnormality detection breaker 41 Detection unit 411 Detection circuit 412 Diagnostic Circuit 43 Contacts 44 Recording Section 451 Abnormality presentation part 452 History Presentation Unit 453 Diagnosis result display section 454 Steering wheel status display unit 48 Control section 481 Handle 482 Diagnostic operation button 49 Communications Department C1 Electrical circuit C11 feed line C2 main line

Claims

1. An abnormality detection breaker connected to a power supply line included in an electric circuit, A detection unit that performs a detection process to detect an abnormal state of the electric circuit; a contact capable of conducting and interrupting an electrical connection between a main electric line that supplies power to the electric circuit and the electric circuit, the contact interrupting the electrical connection when the detection unit detects the abnormal state; an abnormality display unit that displays the abnormal state detected by the detection unit; a recording unit that stores a history of the abnormal state detected by the detection unit, The history of the abnormal condition includes at least one of the number of occurrences of the abnormal condition that occurred in the past, the detection time, and the duration of the abnormal condition. Anomaly detection breaker.

2. The abnormal state is a state in which an arc occurs in the electric circuit.

2. The fault detection circuit breaker according to claim 1.

3. Further comprising a history presentation unit that presents a history of the abnormal state.

3. The abnormality detection circuit breaker according to claim 1 or 2.

4. The history presentation unit visually presents the history of the abnormal condition.

4. The fault detection circuit breaker according to claim 3.

5. the history display unit is configured with a light-emitting element, The light emitting element visually indicates the history of the abnormal state.

5. The fault detection circuit breaker according to claim 4.

6. The history presentation unit audibly presents the history of the abnormal condition. The abnormality detection circuit breaker according to any one of claims 3 to 5.

7. The history display unit also serves as the anomaly display unit. The abnormality detection circuit breaker according to any one of claims 3 to 6.

8. the detection unit includes a detection circuit and a diagnosis circuit; the diagnostic circuit performs a diagnostic process to diagnose whether the detection circuit can normally execute the detection process; A diagnostic result presentation unit that presents a result of the diagnostic process, The history presentation unit also serves as the diagnosis result presentation unit. The abnormality detection circuit breaker according to any one of claims 3 to 7.

9. a handle for switching between electrical connection and disconnection by the contacts when operated; A steering wheel state display unit that displays the state of the steering wheel, The history presentation unit also serves as the handle state presentation unit.

9. The fault detection circuit breaker according to claim 8.

10. a handle that switches between conductive and non-conductive states of electrical connection by the contacts when operated; a diagnosis operation button for receiving an operation regarding the diagnosis process; an operation unit that receives an operation for starting presentation in the history presentation unit or changing the content of the presentation, The operation unit is composed of the handle and the diagnosis operation button.

10. The abnormality detection circuit breaker according to claim 8 or 9.

11. Further comprising a communication unit capable of communicating with an external system; The communication unit transmits the history of the abnormal state stored in the recording unit to the external system. The abnormality detection circuit breaker according to any one of claims 1 to 10.

12. An abnormality detection circuit breaker according to any one of claims 1 to 11; A housing that houses the abnormality detection breaker. Distribution board.

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