Arc fault protection device for three-phase circuit

Abstract

The utility model discloses an arc fault protection device for a three-phase circuit, and the device comprises a circuit board which comprises an upper circuit board and a lower circuit board. The connecting column is arranged between the upper-layer circuit board and the lower-layer circuit board; the arc detection magnetic ring is arranged on the upper side of the lower-layer circuit board; the MCU processor is arranged on the lower side of the lower-layer circuit board, and the MCU processor is connected with the arc detection magnetic ring; the circuit breaker is connected with the MCU processor; the upper layer circuit board and the lower layer circuit board are used for constructing a frame of the three-phase circuit arc fault protection device, an installation space is provided for the arc detection magnetic ring, the MCU processor is used for obtaining information of the arc fault condition of the arc detection magnetic ring to the three-phase circuit to control the on-off of the circuit breaker, and when the arc fault condition occurs, the circuit breaker is connected with the circuit breaker through the MCU processor. And the MCU processor sends out a tripping signal, and the three-phase circuit is electrically disconnected by using the circuit breaker, so that the three-phase circuit is protected.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit protection, in particular to a three-phase circuit arc fault protection device. Background Art

[0002] With the popularization of high-power electrical appliances, the scope of use of three-phase circuits has become increasingly wider, and electricity safety has received more and more attention. For example, if a fault arc occurs during the use of three-phase electricity, the existing three-level or four-pole circuit breakers and leakage protectors cannot identify the fault arc to disconnect the power protection circuit. Therefore, there is a certain danger when an arc fault occurs during the use of three-phase circuits. Utility Model Content

[0003] In order to overcome the above shortcomings, the purpose of the utility model is to provide a three-phase circuit arc fault protection device, by using the upper circuit board and the lower circuit board to construct the framework of the three-phase circuit arc fault protection device, and provide an installation space for the arc detection magnetic ring, by using the MCU processor to obtain the information of the arc fault condition of the three-phase circuit by the arc detection magnetic ring to control the on and off of the circuit breaker, when encountering an arc fault condition, the MCU processor sends a trip signal, and the three-phase circuit is disconnected by using the circuit breaker, thereby protecting the three-phase circuit, and at the same time, after the circuit breaker trips and restarts due to the fault condition, the circuit where the last fault occurred is displayed through the display light.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is: a three-phase circuit arc fault protection device, which is used to protect the circuit from arc damage when the three-phase circuit encounters an arc fault. The three-phase circuit includes a first phase circuit, a second phase circuit and a third phase circuit, including:

[0005] A circuit board, wherein the circuit board comprises an upper circuit board and a lower circuit board, and circuits are arranged on the upper circuit board and the lower circuit board;

[0006] A connecting column, wherein the connecting column is arranged between the upper circuit board and the lower circuit board;

[0007] An arc detection magnetic ring, the arc detection magnetic ring is arranged on the upper side of the lower circuit board;

[0008] An MCU processor, the MCU processor is arranged on the lower side of the lower circuit board, and the MCU processor is connected to the arc detection magnetic ring;

[0009] A circuit breaker is connected to the MCU processor.

[0010] In this technical solution, the circuit board is used for etching the circuit, the connecting column is used to connect the upper circuit board and the lower circuit board and prevent the arc detection magnetic ring from being squeezed and damaged, the arc detection magnetic ring is used to detect the arc fault of the three-phase circuit, the MCU processor is used to receive and compare the signal detected by the arc detection magnetic ring on the arc fault of the three-phase circuit, so as to judge the arc fault of the three-phase circuit. When an arc fault occurs, the MCU processor sends a trip signal, and the three-phase circuit is disconnected by using the circuit breaker, so as to protect the three-phase circuit; the framework of the three-phase circuit arc fault protection device is constructed by using the upper circuit board and the lower circuit board, and an installation space is provided for the arc detection magnetic ring, and the information of the arc fault of the three-phase circuit is obtained by using the MCU processor to control the on and off of the circuit breaker. When an arc fault occurs, the MCU processor sends a trip signal, and the three-phase circuit is disconnected by using the circuit breaker, so as to protect the three-phase circuit; at the same time, the three-phase circuit arc fault protection device is small in size and will not affect the installation.

[0011] In some embodiments, the lower circuit board is provided with a magnetic ring installation groove, and the arc detection magnetic ring is arranged in the magnetic ring installation groove.

[0012] In this technical solution, the magnetic ring mounting groove is used to install the arc detection magnetic ring to prevent the arc detection magnetic ring from shaking, which may cause inaccurate detection data. At the same time, it plays a certain protective role for the arc detection magnetic ring.

[0013] In some embodiments, the arc detection magnetic ring includes a first magnetic ring, a second magnetic ring, and a third magnetic ring, and the magnetic ring mounting groove includes a first magnetic ring mounting groove, a second magnetic ring mounting groove, and a third magnetic ring mounting groove, the first magnetic ring is arranged in the first magnetic ring mounting groove, the second magnetic ring is arranged in the second magnetic ring mounting groove, and the third magnetic ring is arranged in the third magnetic ring mounting groove.

[0014] In this technical solution, three magnetic rings can detect three lines respectively.

[0015] In some embodiments, the first magnetic ring is used to detect an arc fault condition of the first phase circuit, the second magnetic ring is used to detect an arc fault condition of the second phase circuit, and the third magnetic ring is used to detect an arc fault condition of the third phase circuit.

[0016] In this technical solution, the first magnetic ring, the second magnetic ring, and the third magnetic ring respectively detect arc fault conditions on different lines of the three-phase circuit, thereby protecting the three-phase circuit.

[0017] In some implementations, the MCU processor includes a first processor, a second processor, and a third processor, the first processor is connected to the first magnetic ring, the second processor is connected to the second magnetic ring, and the third processor is connected to the third magnetic ring.

[0018] In this technical solution, the first processor is used to receive and compare the detection data of the arc fault condition of the first phase circuit in the three-phase circuit by the first magnetic ring, the second processor is used to receive and compare the detection data of the arc fault condition of the second phase circuit in the three-phase circuit by the second magnetic ring, and the third processor is used to receive and compare the detection data of the arc fault condition of the third phase circuit in the three-phase circuit by the third magnetic ring.

[0019] In some embodiments, the connecting pillar includes a first connecting pillar and a second connecting pillar, and the first connecting pillar and the second connecting pillar are spaced apart along the first direction.

[0020] In this technical solution, the first connecting column and the second connecting column respectively connect the two teams of the upper circuit board and the lower circuit board, and prevent the upper circuit board and the lower circuit board from squeezing the arc detection magnetic ring.

[0021] In some embodiments, the three-phase circuit arc fault protection device further includes a connector socket, and the connector socket is disposed on the lower side of the lower circuit board.

[0022] In this technical solution, the connector socket is used to connect the three-phase circuit arc fault protection device with external equipment.

[0023] In some embodiments, the three-phase circuit arc fault protection device further includes an indicator light connected to the connector socket.

[0024] In this technical solution, when the three-phase circuit arc fault protection device encounters an arc fault, after the circuit breaker is disconnected, the fault pair is eliminated and the circuit breaker is reset, the indicator light is used to display the circuit where the circuit breaker was disconnected due to the arc fault last time, thereby determining the circuit where the fault occurred.

[0025] The beneficial effect of the utility model is that the framework of the three-phase circuit arc fault protection device is constructed by using the upper circuit board and the lower circuit board, and an installation space is provided for the arc detection magnetic ring, and the information of the arc fault condition of the three-phase circuit is obtained by the arc detection magnetic ring through the MCU processor to control the on and off of the circuit breaker. When an arc fault condition occurs, the MCU processor sends a tripping signal, and the three-phase circuit is disconnected by using the circuit breaker, thereby protecting the three-phase circuit; at the same time, the three-phase circuit arc fault protection device is small in size and will not affect the installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1This is a schematic diagram of an application scenario of a three-phase circuit arc fault protection device according to an embodiment of the utility model;

[0027] Figure 2 A schematic diagram of a three-phase circuit arc fault protection device according to an embodiment of the utility model Figure 1 ;

[0028] Figure 3 A schematic diagram of a three-phase circuit arc fault protection device according to an embodiment of the utility model Figure 2 ;

[0029] In the figure: 11, upper circuit board; 12, lower circuit board; 123, magnetic ring installation groove; 2, connecting column; 3, connector socket; 4, arc detection magnetic ring; 5, MCU processor. DETAILED DESCRIPTION

[0030] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0031] Combined with Figure 1 To Attachment Figure 3 As shown, the utility model provides a three-phase circuit arc fault protection device, which is used to protect the circuit from arc damage when the three-phase circuit encounters an arc fault. The three-phase circuit includes a first phase circuit, a second phase circuit and a third phase circuit, including:

[0032] A circuit board, wherein the circuit board comprises an upper circuit board 11 and a lower circuit board 12, and circuits are arranged on the upper circuit board 11 and the lower circuit board 12;

[0033] A connecting column 2, wherein the connecting column 2 is arranged between the upper circuit board 11 and the lower circuit board 12;

[0034] An arc detection magnetic ring 4, wherein the arc detection magnetic ring 4 is arranged on the upper side of the lower circuit board 12, and the main conductor of the three-phase circuit passes through the arc detection magnetic ring 4;

[0035] An MCU processor 5, wherein the MCU processor 5 is disposed on the lower side of the lower circuit board 12, and the MCU processor 5 is connected to the arc detection magnetic ring 4;

[0036] A circuit breaker is connected to the MCU processor.

[0037] The circuit board is used for etching circuits, the connecting column 2 is used to connect the upper circuit board 11 and the lower circuit board 12, and prevent the arc detection magnetic ring 4 from being squeezed and damaged. The arc detection magnetic ring 4 is used to detect the arc fault of the three-phase circuit. The MCU processor 5 is used to receive and compare the arc fault detection signal of the arc detection magnetic ring 4 on the three-phase circuit, so as to judge the arc fault of the three-phase circuit. When an arc fault occurs, the MCU processor sends a trip signal, and the three-phase circuit is disconnected by using a circuit breaker, thereby playing a role in the three-phase circuit. The invention provides a protective effect; the framework of the three-phase circuit arc fault protection device is constructed by using the upper circuit board 11 and the lower circuit board 12, and an installation space is provided for the arc detection magnetic ring 4; the information of the arc fault condition of the three-phase circuit is obtained by the arc detection magnetic ring 4 by using the MCU processor 5 to control the on and off of the circuit breaker; when encountering an arc fault condition, the MCU processor 5 sends a tripping signal, and the circuit breaker is used to disconnect the electrical connection of the three-phase circuit, thereby protecting the three-phase circuit; at the same time, the three-phase circuit arc fault protection device is small in size and will not affect the installation.

[0038] Continue to combine Figure 2 As shown, in some embodiments, the lower circuit board 12 is provided with a magnetic ring mounting groove 123, and the arc detection magnetic ring 4 is arranged in the magnetic ring mounting groove 123. The magnetic ring mounting groove 123 is used to install the arc detection magnetic ring 4 to prevent the arc detection magnetic ring 4 from shaking, resulting in inaccurate detection data. At the same time, it plays a certain protective role for the arc detection magnetic ring 4.

[0039] In some embodiments, the arc detection magnetic ring 4 includes a first magnetic ring, a second magnetic ring, and a third magnetic ring, and the magnetic ring mounting groove 123 includes a first magnetic ring mounting groove 123, a second magnetic ring mounting groove 123, and a third magnetic ring mounting groove 123. The first magnetic ring is arranged in the first magnetic ring mounting groove 123, the second magnetic ring is arranged in the second magnetic ring mounting groove 123, and the third magnetic ring is arranged in the third magnetic ring mounting groove 123. The three magnetic rings can detect three lines respectively.

[0040] In some embodiments, the first magnetic ring is used to detect arc fault conditions in the first phase circuit, the second magnetic ring is used to detect arc fault conditions in the second phase circuit, and the third magnetic ring is used to detect arc fault conditions in the third phase circuit. The first magnetic ring, the second magnetic ring, and the third magnetic ring respectively detect arc fault conditions on different lines of the three-phase circuit, thereby protecting the three-phase circuit.

[0041] In some embodiments, the MCU processor 5 includes a first processor, a second processor and a third processor, the first processor is connected to the first magnetic ring, the second processor is connected to the second magnetic ring, and the third processor is connected to the third magnetic ring. The first processor is used to receive and compare the detection data of the arc fault condition of the first phase circuit in the three-phase circuit by the first magnetic ring, the second processor is used to receive and compare the detection data of the arc fault condition of the second phase circuit in the three-phase circuit by the second magnetic ring, and the third processor is used to receive and compare the detection data of the arc fault condition of the third phase circuit in the three-phase circuit by the third magnetic ring.

[0042] In some embodiments, the connecting column 2 includes a first connecting column 2 and a second connecting column 2, and the first connecting column 2 and the second connecting column 2 are spaced apart along a first direction, and the first connecting column 2 and the second connecting column 2 respectively connect two teams of an upper circuit board 11 and a lower circuit board 12, and prevent the upper circuit board and the lower circuit board 12 from squeezing the arc detection magnetic ring 4.

[0043] Continue to combine Figure 2 As shown, in some embodiments, the three-phase circuit arc fault protection device also includes a connector socket 3, which is arranged on the lower side of the lower circuit board, and the connector socket 3 is used to connect the three-phase circuit arc fault protection device with external equipment.

[0044] In some embodiments, the three-phase circuit arc fault protection device also includes an indicator light, which is connected to the connector socket 3. When the three-phase circuit arc fault protection device encounters an arc fault, after the circuit breaker is disconnected, the fault is eliminated and the circuit breaker is reset, the indicator light is used to display the circuit that was disconnected by the circuit breaker due to the arc fault last time, thereby determining the circuit where the fault occurred.

[0045] In summary, the present patent application provides a three-phase circuit arc fault protection device, which constructs a framework of the three-phase circuit arc fault protection device by using an upper circuit board 11 and a lower circuit board 12, and provides an installation space for the arc detection magnetic ring 4, and controls the on and off of the circuit breaker by using the MCU processor 5 to obtain the information of the arc fault condition of the three-phase circuit by the arc detection magnetic ring 4. When encountering an arc fault, the MCU processor sends a trip signal, and the three-phase circuit is electrically disconnected by using the circuit breaker. At the same time, after the circuit breaker trips and restarts due to the fault condition, the circuit where the last fault occurred is displayed through the display light; at the same time, the three-phase circuit arc fault protection device is small in size and will not affect the installation.

[0046] The above implementation modes are only for illustrating the technical concept and features of the utility model, and their purpose is to allow people familiar with this technology to understand the content of the utility model and implement it. It cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A three-phase circuit arc fault protection device, used to protect the circuit from arc damage when the three-phase circuit encounters an arc fault, the three-phase circuit includes a first phase circuit, a second phase circuit and a third phase circuit, characterized in that: include: A circuit board, wherein the circuit board comprises an upper circuit board and a lower circuit board, and circuits are arranged on the upper circuit board and the lower circuit board; A connecting column, wherein the connecting column is arranged between the upper circuit board and the lower circuit board; An arc detection magnetic ring, the arc detection magnetic ring is arranged on the upper side of the lower circuit board; An MCU processor, the MCU processor is arranged on the lower side of the lower circuit board, and the MCU processor is connected to the arc detection magnetic ring; A circuit breaker is connected to the MCU processor.

2. The three-phase circuit arc fault protection device according to claim 1, characterized in that: The lower circuit board is provided with a magnetic ring installation groove, and the arc detection magnetic ring is arranged in the magnetic ring installation groove.

3. The three-phase circuit arc fault protection device according to claim 2, characterized in that: The arc detection magnetic ring includes a first magnetic ring, a second magnetic ring, and a third magnetic ring. The magnetic ring mounting groove includes a first magnetic ring mounting groove, a second magnetic ring mounting groove, and a third magnetic ring mounting groove. The first magnetic ring is arranged in the first magnetic ring mounting groove, the second magnetic ring is arranged in the second magnetic ring mounting groove, and the third magnetic ring is arranged in the third magnetic ring mounting groove. The first magnetic ring is used to detect an arc fault condition of the first phase circuit, the second magnetic ring is used to detect an arc fault condition of the second phase circuit, and the third magnetic ring is used to detect an arc fault condition of the third phase circuit.

4. The three-phase circuit arc fault protection device according to claim 3, characterized in that: The MCU processor includes a first processor, a second processor and a third processor, the first processor is connected to the first magnetic ring, the second processor is connected to the second magnetic ring, and the third processor is connected to the third magnetic ring.

5. The three-phase circuit arc fault protection device according to claim 1, characterized in that: The connecting pillars include a first connecting pillar and a second connecting pillar, and the first connecting pillar and the second connecting pillar are spaced apart along a first direction.

6. The three-phase circuit arc fault protection device according to claim 1, characterized in that: It also includes a connector socket, which is arranged on the lower side of the lower circuit board.

7. The three-phase circuit arc fault protection device according to claim 6, characterized in that: It also includes an indicator light, which is connected to the connector socket.

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