Arc fault detection device

Abstract

The present invention provides a fault arc detection device. It includes an arc sensor, a signal processing unit, a judgment unit, a processor module, an indication module and a first power supply module; the signal processing unit obtains the detection signal detected by the arc sensor, and processes the arc signal and sends it to the judgment unit, the judgment unit obtains the signal processed by the signal processing unit and determines whether a fault arc occurs, and then sends the determined result to the processor module; the indication module is communicatively connected with the processor module; wherein the signal processing unit and the judgment unit are arranged on a first circuit board; the processor module, the indication module and the first power supply module are arranged on a second circuit board; the first circuit board and the second circuit board are detachably electrically connected through a first connection structure. The fault arc detection device can monitor the fault arc signal of the distribution line in real time, perform local fault arc alarm and remote monitoring of fault arc, and has a simple structure and is easy to install and maintain.

Description

Technical Field

[0001] The present invention relates to the technical field of power distribution system detection, and in particular to a fault arc detection device. Background Art

[0002] Fire accidents in buildings, especially electrical fire accidents, pose a serious threat to people's lives and property. Among the fire accidents every year, electrical fires rank first, and the proportion is on the rise, causing heavy losses. Among them, fault arcs are the main cause of electrical fires. Therefore, it is necessary to invent a fault arc detection device to perform fault arc detection on distribution lines in real time, so as to take effective measures as soon as possible to avoid accidents. Summary of the invention

[0003] The object of the present invention is to provide a fault arc detection device which can monitor the fault arc signal of a distribution line in real time.

[0004] To achieve the above-mentioned purpose, an embodiment of the present invention provides a fault arc detection device. The fault arc detection device includes an arc sensor, a signal processing unit, a judgment unit, a processor module, an indication module and a first power supply module; the signal processing unit obtains a detection signal detected by the arc sensor, and processes the detection signal and sends it to the judgment unit, the judgment unit obtains the detection signal processed by the signal processing unit and determines whether a fault arc occurs, and then sends the determined result to the processor module; the indication module is communicatively connected with the processor module; wherein the signal processing unit and the judgment unit are arranged on a first circuit board; the processor module, the indication module and the first power supply module are arranged on a second circuit board; the first circuit board and the second circuit board are detachably electrically connected through a first connection structure.

[0005] Optionally, the second circuit board is provided with a first connector; the signal processing unit is communicatively connected to the first connector, and acquires the detection signal through the first connector.

[0006] Optionally, a third circuit board is further included, on which a communication module and a second power supply module are provided, and a second connector and a third connector are provided; the third connector is communicatively connected with the first connector; the third circuit board obtains the detection signal through the second connector and sends the detection signal to the first connector through the third connector; the communication module is communicatively connected with the processor module through the third connector.

[0007] Optionally, a fourth circuit board is further included, on which a fourth connector and a fifth connector are provided that are connected to each other, the fourth circuit board is connected to the arc sensor via the fourth connector, and the fifth connector is communicatively connected to the second connector.

[0008] Optionally, a surge protection module is also provided on the second circuit board.

[0009] Optionally, a first box body is further included, and the first circuit board and the second circuit board are arranged in the first box body.

[0010] Optionally, a second box body is further included, and the third circuit board and the first box body are arranged in the second box body.

[0011] Optionally, a third box body is further included, and the fourth circuit board is arranged in the third box body.

[0012] Optionally, a fourth box body is further included, and the arc sensor is arranged in the fourth box body.

[0013] Optionally, there is at least one arc sensor and at least one first circuit board; wherein each arc sensor is communicatively connected to one first circuit board respectively.

[0014] The arc fault detection device provided by the present invention can be arranged in a distribution system such as a distribution cabinet, a distribution box, a cable shaft, etc., and can monitor the arc fault signal of the distribution line in real time, and can perform local arc fault alarm and remote arc fault alarm. The device structure is reasonably arranged, and the assembly process is simplified through the plug-in connection between the circuit boards, and the disassembly and maintenance are convenient. The connection and disassembly can be carried out without power failure, and each circuit board can be inspected and maintained separately, which solves the problem that the entire device needs to be disassembled for inspection and maintenance when a problem occurs, and the problem that the normal use of the user is affected by the inspection and maintenance is solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Schematic diagram of the structure of a fault arc detection device according to an embodiment of the present invention.

[0016] Description of Figure Numbers:

[0017] 1. Arc sensor; 2. Signal processing unit; 3. Judgment unit; 4. Processor module; 5. Indication module; 6. First power module; 7. First circuit board; 8. Second circuit board; 9. First connection structure; 10. First connector; 11. Third circuit board; 12. Communication module; 13. Second power module; 14. Second connector; 15. Third connector; 16. Fourth circuit board; 17. Fourth connector; 18. Fifth connector; 19. Surge protection module. DETAILED DESCRIPTION

[0018] The arc fault detection device according to the embodiment of the present invention is described in detail below with reference to the accompanying drawings.

[0019] like Figure 1 As shown, the fault arc detection device includes an arc sensor 1, a signal processing unit 2, a judgment unit 3, a processor module 4, an indication module 5 and a first power supply module 6; the signal processing unit 2 obtains a detection signal detected by the arc sensor 1, and sends the detection signal to the judgment unit 3 after processing, the judgment unit 3 obtains the detection signal processed by the signal processing unit 2 and determines whether a fault arc occurs, and then sends the determined result to the processor module 4; the indication module 5 is communicatively connected with the processor module 4; wherein the signal processing unit 2 and the judgment unit 3 are arranged on a first circuit board 7; the processor module 4, the indication module 5 and the first power supply module 6 are arranged on a second circuit board 8; the first circuit board 7 and the second circuit board 8 are detachably electrically connected through a first connecting structure 9.

[0020] The arc fault detection device provided by the present invention can be arranged in a distribution system such as a distribution cabinet, a distribution box, a cable shaft, etc., and can monitor the arc fault signal of the distribution line in real time, and can perform local arc fault alarm and remote arc fault alarm. The device structure is reasonably arranged, and the assembly process is simplified through the plug-in connection between the circuit boards, and the disassembly and maintenance are convenient. The connection and disassembly can be carried out without power failure, and each circuit board can be inspected and maintained separately, which solves the problem that the entire device needs to be disassembled for inspection and maintenance when a problem occurs, and the problem that the normal use of the user is affected by the inspection and maintenance is solved.

[0021] Specifically, the arc sensor 1 is used to detect the arc signal generated in the three-phase copper busbar or cable. When the arc sensor 1 detects the arc signal, it will send a detection signal and transmit it to the signal processing unit 2; the signal processing unit 2 can process the detection signal, and the processed detection signal is transmitted to the judgment unit 3; the judgment unit 3 obtains the detection signal processed by the signal processing unit 2 and can compare the detection signal according to the pre-set judgment logic to determine whether a fault arc occurs. For example, the waveform of the signal detected by the arc sensor can be analyzed. When the waveform meets a specific shape, direction or trend in a predetermined interval, it can be judged that a fault arc occurs. However, the judgment logic is not limited to this, and any other judgment logic suitable for judging the occurrence of a fault arc can also be used. Then the judgment unit 3 sends the determined result to the processor module 4, and the processor module 4 controls the indication module 5 to display the state of the circuit according to the determined result. If it is determined that a fault arc occurs in the three-phase circuit, the processor module 4 controls the indication module 5 to display accordingly to remind the staff that a fault arc occurs in the circuit. In an optional manner, the judgment unit 3 sends a signal to the processor module 4 only when it is judged that a fault arc occurs, and if it is judged that no fault arc occurs, the judgment unit does not send a signal to the processor module 4. In another optional manner, the judgment unit 3 sends different information to the processor module 4 according to whether a fault arc occurs.

[0022] Optionally, the first connection structure 9 may include a gold finger disposed on the first circuit board, and a gold finger slot corresponding to the gold finger disposed on the second circuit board, but is not limited thereto.

[0023] The processor module 4 is in communication connection with the indication module 5, and the indication module 5 is used to send out an alarm signal. Preferably, the indication module 5 can indicate the three-phase fault arc signals respectively, so that the location of the fault arc can be determined more conveniently, and it is convenient for relevant personnel to handle the fault information in time and realize local control. Among them, the indication module 5 can be any device that can send out an alarm signal, such as an LED indicator or a buzzer alarm.

[0024] Among them, the signal processing unit 2 and the judgment unit 3 are arranged on the first circuit board 7, and the processor module 4, the indication module 5 and the first power module 6 are arranged on the second circuit board 8. The first power module 6 is used to supply power to the arc sensor 1, the signal processing unit 2, the judgment unit 3, the processor module 4, and the indication module 5. The first circuit board 7 and the second circuit board 8 can make the circuit layout compact, which plays an important role in the mass production and optimized layout of the circuit board. Among them, the first circuit board 7 and the second circuit board 8 are arranged in a detachable electrically connected manner, which is achieved by respectively arranging sockets, plugs, etc. on the first circuit board 7 and the second circuit board 8. The purpose of such arrangement is to further simplify the assembly process of the circuit board, facilitate disassembly and maintenance, and the circuit board can be connected and disassembled without power failure. When each circuit board needs to be repaired and maintained, each circuit board can be repaired and maintained separately, avoiding the cumbersome step of disassembling the entire device when a problem occurs, and ensuring the normal use of the user.

[0025] Optionally, there is at least one arc sensor 1 and at least one first circuit board 7 .

[0026] Preferably, there are three arc sensors 1, which are respectively arranged in one-to-one correspondence with the three-phase copper busbars or cables; there are three first circuit boards 7, which respectively correspond to the three-phase arc signals; wherein each arc sensor 1 is respectively connected to a first circuit board 7 for communication. In this way, arc faults on each phase copper busbar or cable can be detected more accurately.

[0027] Optionally, the second circuit board 8 is provided with a first connector 10 ; the signal processing unit 2 is communicatively connected with the first connector 10 , and acquires the detection signal through the first connector 10 .

[0028] The purpose of providing the first connector 10 is to ensure the normal communication connection between the signal processing unit 2 and the arc sensor 1. At the same time, the detection signal emitted by the arc sensor 1 can be transmitted to the signal processing unit 2 through the first connector 10. The first connector 10 can be a finger plug interface provided on the second circuit board 8, and the finger plug interface can include an arc signal interface and a detection signal interface.

[0029] Optionally, the fault arc detection device also includes a third circuit board 11, on which a communication module 12 and a second power supply module 13 are provided, and on which a second connector 14 and a third connector 15 are provided; the third connector 15 is communicatively connected to the first connector 10; the third circuit board 11 obtains the detection signal through the second connector 14 and sends the detection signal to the first connector 10 through the third connector 15; the communication module 12 is communicatively connected to the processor module 4 through the third connector 15.

[0030] The second power supply module 13 is used to supply power to the communication module 12. The second connector 14 and the third connector 15 are both used to transmit signals. The third connector 15 is connected to the first connector 10 for communication connection between the second circuit board 8 and the third circuit board 11. The second connector 14 on the third circuit board 11 can be connected to the detection signal emitted by the arc sensor 1, and the detection signal is sent to the first connector 10 through the third connector 15, and then the detection signal is transmitted to the signal processing unit 2 through the first connector 10. After processing, the judgment unit 3 determines whether a fault arc signal has occurred, and then transmits it to the processor module 4, which is connected to the first connector 10. In this way, the communication connection between the processor module 4 and the second connector 14 is realized. The communication module 12 is connected to the processor module 4 through the third connector 15, and the detection signal emitted by the arc sensor 1 or the fault arc signal judged by the judgment unit 3 is collected by a data acquisition device such as a data acquisition device through the communication module 12, and reported to the host computer, thereby realizing remote monitoring of the fault arc.

[0031] Optionally, the fault arc detection device also includes a fourth circuit board 16 , on which a fourth connector 17 and a fifth connector 18 are provided. The fourth circuit board 16 is connected to the arc sensor 1 via the fourth connector 17 , and the fifth connector 18 is communicatively connected to the second connector 14 .

[0032] The fourth connector 17 is used to connect to the arc sensor 1 and transmit the detection signal detected by the arc sensor 1 . The fifth connector 18 is communicatively connected to the second connector 14 to communicatively connect the fourth circuit board 16 and the third circuit board 11 .

[0033] Preferably, a surge protection module 19 is also provided on the second circuit board 8. The surge protection module 19 can conduct the shunt in a very short time, thereby preventing the damage of the surge to other devices in the circuit. For example, surge protection can be achieved by setting a parallel capacitor and a series inductor in the circuit. In this way, the service life and safety performance of the fault arc detection device are greatly improved.

[0034] Optionally, the fault arc detection device also includes a first box body, a second box body, a third box body and a fourth box body, the first circuit board 7 and the second circuit board 8 are arranged in the first box body; the third circuit board 11 and the first box body are arranged in the second box body; the fourth circuit board 16 is arranged in the third box body; and the arc sensor 1 is arranged in the fourth box body.

[0035] Specifically, the first box body also has a connector, and the connector and the arc sensor 1 are connected to the fourth connector 17 on the fourth circuit board 16; a door that can be opened and closed can be opened on the second box body, and the third circuit board 11 and the first box body can be arranged in the second box body. By arranging the first box body, the second box body, the third box body and the fourth box body, the fault arc detection device can be well protected to prevent it from being damaged by collision.

[0036] The present invention has the following beneficial effects:

[0037] The arc fault detection device provided by the present invention can be arranged in a distribution system such as a distribution cabinet, a distribution box, a cable shaft, etc., can monitor the arc fault signal of the distribution line in real time, can perform local arc fault alarm and remote arc fault alarm, and the device structure is reasonably arranged, through the plug-in connection between the circuit boards, the assembly process is simplified, and it is convenient to disassemble and maintain, and it can be connected and disassembled without power failure, and each circuit board can be inspected and maintained separately, which solves the problem that when a problem occurs, the entire device needs to be disassembled for inspection and maintenance, and the problem that the normal use of the user is affected by the inspection and maintenance. By setting up a surge protection module, the service life and safety performance of the arc fault detection device are greatly improved. By setting up the first box body, the second box body, the third box body and the fourth box body, the arc fault detection device can be well protected to prevent it from being damaged by bumps.

[0038] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A fault arc detection device, comprising an arc sensor (1), a signal processing unit (2), a judgment unit (3), a processor module (4), an indication module (5) and a first power supply module (6); characterized in that: The signal processing unit (2) obtains a detection signal detected by the arc sensor (1), processes the detection signal and sends it to the judgment unit (3); the judgment unit (3) obtains the detection signal processed by the signal processing unit (2) and determines whether a fault arc occurs, and then sends the determination result to the processor module (4); the indication module (5) is communicatively connected to the processor module (4); the processor module (4) controls the indication module (5) to display the state of the circuit according to the determination result; wherein the signal processing unit (2) and the judgment unit (3) are arranged on a first circuit board (7); the processor module (4), the indication module (5) and the first power supply module (6) are arranged on a second circuit board (8); the first circuit board (7) and the second circuit board (8) are detachably electrically connected via a first connection structure (9); The second circuit board (8) is provided with a first connector (10); the signal processing unit (2) is communicatively connected with the first connector (10) and obtains the detection signal through the first connector (10). The arc fault detection device further comprises a third circuit board (11), on which a communication module (12), a second power supply module (13), a second connector (14) and a third connector (15) are provided; the third connector (15) is communicatively connected to the first connector (10); the third circuit board (11) obtains the detection signal through the second connector (14) and sends the detection signal to the first connector (10) through the third connector (15); the communication module (12) is communicatively connected to the processor module (4) through the third connector (15), The arc fault detection device further comprises a fourth circuit board (16), the fourth circuit board (16) being provided with a fourth connector (17) and a fifth connector (18) which are in communication with each other, the fourth circuit board (16) being connected to the arc sensor (1) via the fourth connector (17), and the fifth connector (18) being communicatively connected to the second connector (14).

2. The arc fault detection device according to claim 1, characterized in that: The second circuit board (8) is also provided with a surge protection module (19).

3. The arc fault detection device according to claim 1, characterized in that: It also comprises a first box body, in which the first circuit board (7) and the second circuit board (8) are arranged.

4. The arc fault detection device according to claim 3, characterized in that: It also comprises a second box body, in which the third circuit board (11) and the first box body are arranged.

5. The arc fault detection device according to claim 1, characterized in that: It also comprises a third box body, in which the fourth circuit board (16) is arranged.

6. The arc fault detection device according to claim 1, characterized in that: It also comprises a fourth box body, in which the arc sensor (1) is arranged.

7. The arc fault detection device according to claim 1, characterized in that: There is at least one arc sensor (1) and at least one first circuit board (7); wherein each arc sensor (1) is respectively communicatively connected to one first circuit board (7).

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