Electric arc generating device

Abstract

The utility model provides an electric arc generating device, which comprises a control module, a mode switching loop and an electric arc generator, the mode switching loop is arranged between the control module and the electric arc generator, and a load is connected to a test circuit according to different connection relations by controlling the actuation or release of a plurality of switching devices of the mode switching loop through the control module. And the plurality of loads and the arc generator are in different loop connection states, so that the arc suppression load shielding test of the to-be-tested arc fault protector is tested. The arc generating device is simple in structure, low in cost and easy to carry, and can detect a large batch of to-be-detected arc fault protectors; and through automatic switching of the control loop and the mode switching loop, the to-be-tested arc fault protector can be automatically tested, so that the test efficiency of the to-be-tested arc fault protector is improved.

Description

Technical Field

[0001] The present application relates to the technical field of low-voltage electrical appliances, and in particular to an arc generating device. Background Art

[0002] With the continuous improvement of power safety products, the demand for arc fault protectors (Arc Fault Detection Device, AFDD) continues to increase. Arc fault protectors can detect arc faults in electrical circuits and cut off the circuit before causing electrical fires, effectively preventing electrical fires caused by arc faults. Since arc faults are affected by load types, arc fault protectors as terminal electrical appliances need to realize arc fault detection under different load conditions, correctly identify normal arcs and fault arcs, and distinguish between fault arcs and waveforms of normal operation of electrical equipment. Arc fault protectors need to be tested and verified. In the prior art, arc fault protectors are usually tested and verified by configuring different related test circuits through fault arc generating devices. However, existing arc generating devices are usually large in size and high in cost. Therefore, it is difficult to detect arc fault protectors in large quantities through arc generating devices. Utility Model Content

[0003] The purpose of the present application is to provide an arc generating device, which is used to solve the problem in the prior art that it is difficult to detect arc fault protectors in large quantities through arc generating devices.

[0004] In order to achieve the above-mentioned object, the present application provides an arc generating device, comprising a control module, a mode switching circuit and an arc generator, wherein the mode switching circuit is arranged between the control module and the arc generator, and the arc generator is connected to an arc fault protector to be tested;

[0005] The mode switching circuit includes a plurality of switch devices and a plurality of loads, and the plurality of switch devices are connected to the plurality of loads;

[0006] The control module is connected to the plurality of switch devices and is used to control the closing or releasing of the plurality of switch devices so that the plurality of loads and the arc generator are in different loop connection states to test the arc suppression load shielding test of the arc fault protector to be tested.

[0007] In one embodiment of the present application, the plurality of switch devices include a plurality of switch groups, each switch group corresponding to a load;

[0008] Each switch group includes a first switch device and a second switch device connected in sequence, the normally open end of the first switch device is connected to the arc fault protector to be tested, the normally closed end of the first switch device is connected to the arc generator, the second switch device is connected between the first switch device and a first end of the load, and the second end of the load is connected to the arc fault protector to be tested;

[0009] For each switch group, when the first switch device and the second switch device are both energized, the corresponding load is connected to the arc fault protector to be tested; when the second switch device is energized but the first switch device is released, the corresponding load is connected to the arc generator; when the second switch device is released, the corresponding load is not connected to the arc fault protector to be tested and the arc generator.

[0010] In one embodiment of the present application, the arc generating device further includes a switching device driving module connected between the mode switching circuit and the control module, and configured to receive a switching signal sent by the control module to drive the closing or releasing of multiple switching devices.

[0011] In one embodiment of the present application, the multiple loads include a shielded load and a resistive load, and the loop connection state includes:

[0012] The shielding load is connected to the arc generator;

[0013] The shielding load is connected between the arc generator and the arc fault protector to be tested, and the resistive load is connected to the arc generator;

[0014] A resistive load is connected between the arc generator and the arc fault protector to be tested, and a shielding load is connected to the arc generator;

[0015] Both the shield load and the resistive load are connected to the arc generator.

[0016] In one embodiment of the present application, the arc fault protector to be tested includes a first outlet terminal and a second outlet terminal, the arc generator includes a carbon rod electrode and a copper rod electrode, and the plurality of switch devices include a first relay, a second relay, a third relay, and a fourth relay;

[0017] A first normally open end of the first relay is connected to a first outlet terminal of the arc fault protector to be tested, and a first normally closed end of the first relay is connected to a copper rod electrode of the arc generator;

[0018] The second common terminal of the second relay is connected to the first common terminal of the first relay, and the second normally open terminal of the second relay is connected to the first terminal of the resistive load; or, the second common terminal of the second relay is connected to the first terminal of the resistive load, and the second normally open terminal of the second relay is connected to the first common terminal of the first relay;

[0019] The third normally open end of the third relay is connected to the first outlet terminal of the arc fault protector to be tested, and the third normally closed end of the third relay is connected to the copper rod electrode of the arc generator;

[0020] The fourth common terminal of the fourth relay is connected to the third common terminal of the third relay, and the fourth normally-open terminal of the fourth relay is connected to the first terminal of the shielded load; or, the fourth common terminal of the fourth relay is connected to the first terminal of the shielded load, and the fourth normally-open terminal of the fourth relay is connected to the third common terminal of the third relay;

[0021] The second end of the resistive load is respectively connected to the second end of the shielding load and the second outlet terminal of the arc fault protector to be tested.

[0022] In one embodiment of the present application, an arc generator includes a base, a driving unit and a moving unit, the moving unit is arranged on the base, the driving unit is connected to the moving unit and drives the moving unit to move on the base; the carbon rod electrode is fixed at one end of the base, and the copper rod electrode is installed on the moving unit; the copper rod electrode is driven by the driving unit to drive the moving unit to move toward or away from the carbon rod electrode, thereby cooperating with the carbon rod electrode to generate an arc.

[0023] In one embodiment of the present application, the arc generating device further includes:

[0024] A driving module, connected between the arc generator and the control module, for receiving a driving signal sent by the control module to drive the driving unit to reciprocate, so that the copper rod electrode moves toward or away from the carbon rod electrode;

[0025] The current detection module is respectively connected to the driving module, the driving unit and the control module, and is used to detect the current of the driving unit in the reciprocating motion and send the current to the control module.

[0026] In one embodiment of the present application, the arc generating device further includes:

[0027] The position detection module is connected between the arc generator and the control module and is used to detect the position signals of the carbon rod electrode and the copper rod electrode.

[0028] In one embodiment of the present application, the mode switching circuit further includes a cooling element for cooling the target load of the mode switching circuit, and the arc generating device further includes:

[0029] A temperature detection module, connected to the control module and the target load of the mode switching circuit respectively, for detecting the temperature of the target load in the mode switching circuit;

[0030] The cooling drive module is connected to the control module and the cooling element of the mode switching circuit respectively, and is used to drive the cooling element according to the cooling drive signal of the control module to cool the target load in the mode switching circuit.

[0031] In one embodiment of the present application, the arc generating device further includes:

[0032] The interaction module is connected to the control module and is used to send the input interaction information to the control module and display the display information sent by the control module.

[0033] The present application proposes an arc generating device, in which a mode switching circuit is set between a control module and an arc generator, and the control module controls the attraction or release of multiple switch devices of the mode switching circuit to connect the load to the test circuit according to different connection relationships, so that multiple loads and the arc generator are in different circuit connection states, thereby testing the arc suppression load shielding test of the arc fault protector to be tested. The arc generating device of the present application has a simple structure, low cost and is easy to carry, and can detect a large number of arc fault protectors to be tested; and through the automatic switching of the control circuit and the mode switching circuit, the arc fault protector to be tested can be automatically tested, thereby improving the test efficiency of the arc fault protector to be tested.

[0034] Other features and advantages of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0036] Figure 1 A schematic diagram of an arc generating device according to an embodiment of the present application;

[0037] Figure 2 A schematic diagram of a mode switching circuit of an embodiment of the present application;

[0038] Figure 3(a) to Figure 3(d) Schematic diagram of four circuit connection states of arc suppression load shielding test in an embodiment of the present application;

[0039] Figure 4 A circuit diagram of a mode switching circuit according to an embodiment of the present application;

[0040] Figure 5 It is a schematic diagram of an arc generating device according to another embodiment of the present application.

[0041] Description of Reference Numerals

[0042] 100. Arc generating device; 110. Control module; 120. Mode switching circuit; 121. First switch device; 122. Second switch device; 123. Load; 1231. Shielded load; 1232. Resistive load; 130. Arc generator; 131. Drive unit; 132. Moving unit; 133. Carbon rod electrode; 134. Copper rod electrode; 135. Base; 140. Switch device drive module; 150. Drive module; 160. Current detection module; 170. Position detection module; 181. Temperature detection module; 182. Cooling drive module; 190. Interaction module; 191. Display unit; 192. Indication unit; 200. Arc fault protector to be tested. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of this application.

[0044] In the description of the present application, it should be understood that the terms "first" and "second" are used only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined. In the present application, the word "exemplary" is used to mean "used as an example, illustration or description". Any embodiment described as "exemplary" in the present application is not necessarily interpreted as being more preferred or more advantageous than other embodiments. In order to enable any technician in the field to implement and use the present application, the following description is given. In the following description, details are listed for the purpose of explanation. It should be understood that a person of ordinary skill in the art can recognize that the present application can also be implemented without using these specific details. In other examples, well-known structures and processes will not be elaborated in detail to avoid unnecessary details that make the description of the present application obscure. Therefore, the present application is not intended to be limited to the embodiments shown, but is consistent with the widest range of principles and features disclosed in the present application.

[0045] The arc generating device of the embodiment of the present application is a device that can test the arc fault protector. The arc fault protector to be tested refers to the arc fault protector that needs to be tested. The arc fault protector is a device that can detect arc faults in a circuit and quickly cut off the circuit. In one example, the arc fault protector can be an arc fault circuit breaker. Unlike ordinary circuit breakers, arc fault protectors can not only detect faults such as overload and short circuit, but also detect arc phenomena occurring in the circuit, effectively preventing the fire hazard caused by arc in the circuit. The arc generating device and the arc fault protector to be tested are connected to each other, and the arc suppression load shielding test specified in GB / T31143 can be realized. Since the arc generating devices on the market are usually large in size and high in cost, it is difficult to detect arc fault protectors in large quantities through arc generating devices. Therefore, the embodiment of the present application provides a miniaturized arc generating device.

[0046] Figure 1 FIG. 1 is a schematic diagram of an arc generating device 100 according to an embodiment of the present application. Figure 1 As shown, in the embodiment of the present application, the arc generating device 100 includes a control module 110, a mode switching circuit 120 and an arc generator 130, the mode switching circuit 120 is arranged between the control module 110 and the arc generator 130, and the arc generator 130 is connected to the arc fault protector 200 to be tested to form a test circuit. The control module 110 in the embodiment of the present application is used to control the arc generator 130 to generate an arc. Therefore, the arc in the embodiment of the present application is automatically generated under the control of the control module 110. In one example, the control module 110 can be a microcontroller unit (MCU) with the characteristics of small size, low power consumption, high integration, easy programming and wide application.

[0047] In addition, the embodiment of the present application controls the arc generator 130 to move by controlling the mode switching circuit 120 to be in different circuit connection states to generate an arc. In the embodiment of the present application, the mode switching circuit 120 may include multiple switch devices and multiple loads, wherein the multiple switch devices are connected to the multiple loads. The multiple switch devices can change the connection relationship between the multiple loads and the arc generator 130 through two different states of attraction or release, so that the multiple loads and the arc generator 130 are in different circuit connection states. Among them, the circuit connection state refers to the connection relationship between the multiple loads and the arc generator 130 and the arc fault protector 200 to be tested, that is, the connection relationship between the multiple loads and the test circuit. For example, multiple loads are connected to the arc generator 130 or the arc fault protector 200 to be tested. Specifically, the control module 110 can be connected to multiple switch devices to control the attraction or release of multiple switch devices so that the multiple loads and the arc generator 130 are in different circuit connection states to test the arc suppression load shielding test of the arc fault protector 200 to be tested.

[0048] The arc generating device 100 of the embodiment of the present application sets a mode switching circuit 120 between the control module 110 and the arc generator 130, and connects multiple loads to the test circuit according to different connection relationships, so as to test the arc suppression load shielding test of the arc fault protector 200 to be tested. The arc generating device 100 has a simple structure, low cost and is easy to carry, and can detect a large number of arc fault protectors 200 to be tested; and through the automatic switching of the control circuit 110 and the mode switching circuit 120, the arc fault protector 200 to be tested can be automatically tested, thereby improving the test efficiency of the arc fault protector 200 to be tested.

[0049] Figure 2 FIG. 1 is a schematic diagram of a mode switching circuit of an embodiment of the present application. Figure 2 As shown, in the embodiment of the present application, the plurality of switch devices may include a plurality of switch groups, and each switch group corresponds to a load 123. Each switch group includes a first switch device 121 and a second switch device 122 connected in sequence, the normally open end NO of the first switch device 121 is connected to the arc fault protector 200 to be tested, the normally closed end NC of the first switch device 121 is connected to the arc generator 130, the second switch device 122 is connected between the first switch device 121 and the first end of the load 123, and the second end of the load 123 is connected to the arc fault protector 200 to be tested.

[0050] For each switch group, when the first switch device 121 and the second switch device 122 are both energized, the corresponding load 123 is connected to the arc fault protector 200 to be tested; when the second switch device 122 is energized but the first switch device 121 is released, the corresponding load 123 is connected to the arc generator 130; when the second switch device 122 is released, the corresponding load 123 is not connected to the arc fault protector 200 to be tested and the arc generator 130.

[0051] The arc suppression load shielding test refers to using a specific load to test the arc fault suppression capability of the arc fault protector 200 to be tested. In the embodiment of the present application, the control module 110 can drive different switch devices to be attracted according to the set shielding test mode, so that multiple loads are cut into the corresponding loop connection state, wherein the multiple loads can include shielding loads and resistive loads. Figure 3(a) to Figure 3(d) Schematic diagram of four circuit connection states of arc suppression load shielding test of the embodiment of the present application. As shown in Figure 3, according to the standard GBT31143 "General Requirements for Arc Fault Protectors (AFDD)", the circuit connection states of the embodiment of the present application may include: shielding load 1231 is connected to the arc generator 130; shielding load 1231 is connected between the arc generator 130 and the arc fault protector 200 to be tested, and the resistive load 1232 is connected to the arc generator 130; resistive load 1232 is connected between the arc generator 130 and the arc fault protector 200 to be tested, and shielding load 1231 is connected to the arc generator 130; and shielding load 1231 and resistive load 1232 are both connected to the arc generator 130. Therefore, the embodiment of the present application needs to connect the load 123 to the arc fault protector 200 to be tested or the arc generator 130. There are three possible access modes for the load 123: access to the arc fault protector 200 to be tested, access to the arc generator 130, or access to neither the arc fault protector 200 to be tested nor the arc generator 130. Based on this, the embodiment of the present application uses a switch group composed of a first switch device 121 and a second switch device 122 connected in sequence, so that the load 123 corresponding to the switch group can be in one of the above three access modes according to the pull-in or release state of the first switch device 121 and the second switch device 122.

[0052] In the embodiment of the present application, the first switch device 121 is a switch device that can conduct the load 123 and the arc generator 130 as well as the load 123 and the arc fault protector 200 to be tested, and is used to select the element to which the load 123 is connected. Specifically, the first switch device 121 includes a normally open terminal NO and a normally closed terminal NC, and the normally open terminal NO is connected to the arc fault protector 200 to be tested. In this way, when the first switch device 121 is energized, that is, when the normally open terminal NO is closed to the common terminal, a loop is formed between the load 123 and the arc fault protector 200 to be tested, and the load 123 is connected to the arc fault protector 200 to be tested; when the first switch device 122 is released, that is, when the normally closed terminal NC is closed to the common terminal, a loop is formed between the load 123 and the arc generator 130, and the load 123 is connected to the arc generator 130. The control module 110 only needs to control the common terminal of the first switch device 121 to attract the normally open terminal and the NO or normally closed terminal NC, so that the load 123 can be connected to the corresponding element, and the switching of the connection mode is simple and convenient.

[0053] However, in the arc suppression load shielding experiment, there is also a situation where the load 123 is not connected to any component. Therefore, the embodiment of the present application also requires a second switch device 122 to disconnect the load 123 from both the arc fault protector 200 to be tested and the arc generator 130. The second switch device 122 is a switch device used to connect or disconnect the load 123 and the test circuit. Only when the first switch device 121 and the second switch device 122 are both energized, the circuit between the corresponding load 123 and the arc fault protector 200 to be tested is connected; similarly, when the second switch device 122 is energized, when the first switch device 121 is released, the circuit between the corresponding load 123 and the arc generator 130 is connected; when the second switch device 122 is released, whether the first switch device 121 is energized or released, the corresponding load 123 is not connected to the test circuit, that is, it is neither connected to the arc fault protector 200 to be tested nor to the arc generator 130. In one example, both the first switch device and the second switch device may be relays. For example, the first switch device may be a self-resetting single-pole double-throw relay, and the second switch device may be a self-resetting single-pole single-throw relay.

[0054] The embodiment of the present application changes the connection relationship between the load 123 and the test circuit only through the attraction and release of the first switching device and the second switching device, so that the load 123 and the arc generator 130 are in different loop connection states, which can make the arc suppression load shielding test of the arc fault protector to be tested simpler, more efficient and less expensive.

[0055] Figure 4 FIG. 1 is a circuit diagram of a mode switching circuit 120 according to an embodiment of the present application. Figure 4As shown, in the embodiment of the present application, the arc fault protector 200 to be tested includes a first outlet terminal a and a second outlet terminal b, the arc generator 130 includes a carbon rod electrode 133 and a copper rod electrode 134, and the multiple switching devices include a first relay K1, a second relay K2, a third relay K3 and a fourth relay K4.

[0056] The first normally open terminal 12 of the first relay K1 is connected to the first outlet terminal a of the arc fault protector 200 to be tested, and the first normally closed terminal 13 of the first relay K1 is connected to the copper rod electrode 134 of the arc generator 130. The second common terminal 24 of the second relay K2 is connected to the first common terminal 15 of the first relay K1, and the second normally open terminal 23 of the second relay K2 is connected to the first terminal of the resistive load 1232 ( Figure 4 This connection mode is used as an example); or, the second common terminal 24 of the second relay K2 is connected to the first end of the resistive load 1232, and the second normally open terminal 23 of the second relay K2 is connected to the first common terminal 15 of the first relay K1. Among them, the pins 11 and 14 of the first relay K1 and the pins 21 and 22 of the second relay K2 can be drive pins.

[0057] The third normally open terminal 32 of the third relay K3 is connected to the first outlet terminal a of the arc fault protector 200 to be tested, and the third normally closed terminal 33 of the third relay K3 is connected to the copper rod electrode 134 of the arc generator 130. The fourth common terminal 43 of the fourth relay K4 is connected to the third common terminal 35 of the third relay K3, and the fourth normally open terminal 43 of the fourth relay K4 is connected to the first end of the shielding load 1231; or, the fourth common terminal 44 of the fourth relay K4 is connected to the first end of the shielding load 1231, and the fourth normally open terminal 43 of the fourth relay K4 is connected to the third common terminal 35 of the third relay K3 ( Figure 4 This connection mode is taken as an example. Among them, the pin 31 and the pin 34 of the third relay K3 and the pin 41 and the pin 42 of the fourth relay K4 can be driving pins.

[0058] In order to form a loop, the second end of the resistive load 1232 is respectively connected to the second end of the shielding load 1231 and the second output terminal b of the arc fault protector 200 to be tested.

[0059] In the embodiment of the present application, the shielding load 1231 is a load that is shielded by a shielding device in the circuit. It is connected to various electrical appliances as a load, which can reduce electromagnetic interference and ensure the reliability and stability of signal transmission. The resistive load 1232 is a load composed of a resistor, which can convert electrical energy into thermal energy, and its resistance value determines the magnitude of the current passing through the load. The first relay K1 and the second relay K2 together constitute the switch group corresponding to the resistive load 1232, and the third relay K3 and the fourth relay K4 together constitute the switch group corresponding to the shielding load 1231. When the first relay K1 and the second relay K2 are both energized, the first common terminal 15 and the first normally open terminal 12 of the first relay K1 are closed, and the second common terminal 24 and the second normally open terminal 23 of the second relay K2 are closed. At this time, the resistive load 1232 is connected to the arc fault protector 200 to be tested.

[0060] When the first relay K1 is released and the second relay K2 is energized, the first common terminal 15 and the first normally closed terminal 13 of the first relay K1 are closed, the second common terminal 24 and the second normally open terminal 23 of the second relay K2 are closed, and the resistive load 1232 is connected to the arc generator 130 .

[0061] When the second relay K2 is released, the second common terminal 24 and the second normally open terminal 23 are disconnected, and the resistive load 1232 is neither connected to the arc generator 130 nor to the arc fault protector 200 to be tested.

[0062] Similarly, when the third relay K3 and the fourth relay K4 are both energized, the third common terminal 35 and the third normally open terminal 32 are closed, the fourth common terminal 44 and the fourth normally open terminal 43 of the fourth relay K4 are closed, and the shielding load 1231 is connected to the arc fault protector 200 to be tested.

[0063] When the third relay K3 is released and the fourth relay K4 is energized, the third common terminal 35 and the third normally closed terminal 33 of the third relay K3 are closed, the fourth common terminal 44 and the fourth normally open terminal 43 of the fourth relay K4 are closed, and the shielding load 1231 is connected to the arc generator 130; when the fourth relay K4 is released, the fourth common terminal 44 and the fourth normally open terminal 43 are disconnected, and the shielding load 1231 is neither connected to the arc generator 130 nor to the arc fault protector 200 to be tested.

[0064] Based on the above-mentioned four circuit connection states of the arc suppression load shielding test, the control module 110 can send corresponding drive signals according to the configuration to control the first relay K1, the second relay K2, the third relay K3 and the fourth relay K4 to complete the switching of the four breeding mode states. The specific method is as follows: the drive signal corresponding to the circuit connection state of Figure 3 (a) is: the first drive signal for controlling the fourth relay K4 to be attracted, and the first relay K1, the second relay K2 and the third relay K3 to be released; the drive signal corresponding to the circuit connection state of Figure 3 (b) is: the second drive signal for controlling the second relay K2, the third relay K3 and the fourth relay K4 to be attracted, and the first relay K1 to be released; the drive signal corresponding to the circuit connection state of Figure 3 (c) is: the third drive signal for controlling the first relay K1, the second relay K2 and the fourth relay K4 to be attracted, and the third relay K3 to be released; the drive signal corresponding to the circuit connection state of Figure 3 (d) is: the fourth drive signal for controlling the second relay K2 and the fourth relay K4 to be attracted, and the first relay K1 and the third relay K3 to be released. By configuring the control module 110 with the above-mentioned driving signal in advance, the four circuit connection states of the arc suppression load shielding test can be automatically realized by the attraction or release of four relays. The test is simple, efficient and low-cost, thereby improving the test efficiency.

[0065] Figure 5 FIG. 1 is a schematic diagram of an arc generating device 100 according to another embodiment of the present application. Figure 5 As shown, in an embodiment of the present application, the arc generator 130 may include a base 135, a driving unit 131 and a moving unit 132, the moving unit 132 is arranged on the base 135, the driving unit 131 is connected to the moving unit 132 and drives the moving unit 132 to move on the base 135; the carbon rod electrode 133 is fixed at one end of the base 135, and the copper rod electrode 134 is installed on the moving unit 132; the copper rod electrode 134 is driven by the driving unit 131 to drive the moving unit 132 to move toward or away from the carbon rod electrode 133, thereby cooperating with the carbon rod electrode 133 to generate an arc.

[0066] Among them, the carbon rod electrode 133 is an electrode made of carbon material, which can withstand arcs and heat under high temperature conditions. The copper rod electrode 134 is an electrode made of copper material, which can efficiently transmit current. The carbon rod electrode 133 can always be in a stationary state, and an arc is generated in cooperation with the copper rod electrode 134. The copper rod electrode 134 is installed on the mobile unit 132, and is on the same axis as the carbon rod electrode 133. The mobile unit 132 can be driven by the driving unit 131 to move together, and an arc is generated in cooperation with the carbon rod electrode 133. Preferably, the end face of the copper rod electrode 134 can be conical. The driving unit 131 is used to drive the mobile unit 132 to reciprocate, thereby driving the copper rod electrode 134 on the mobile unit 132 to move toward or away from the carbon rod electrode 133. When an arc occurs, the carbon rod electrode 133 and the copper rod electrode 134 are first closed, and then the copper rod electrode 134 is slowly moved to separate it from the carbon rod electrode 133. At this time, an arc will be generated between the carbon rod electrode 133 and the copper rod electrode 134 due to the tip discharge phenomenon. In one example, the driving unit 131 and the moving unit 132 may be an integrated stepping motor and a lead screw slide. In another example, the driving unit 131 and the moving unit 132 may also be a separate motor and a slide rail.

[0067] In the embodiment of the present application, the arc generating device 100 may further include a switch device driving module 140, which is connected between the mode switching circuit 120 and the control module 110, and is used to receive the switching signal sent by the control module 110 to drive the closure or release of multiple switch devices. In one example, the switch device driving module 140 may be a relay driving circuit, which is used to receive the switching signal sent by the control module 110, and complete the selective conduction of the mode switching circuit 120 by controlling the closure or release of the relay.

[0068] In the embodiment of the present application, the arc generating device 100 may further include a driving module 150 and a current detection module 160. The driving module 150 is connected between the driving unit 131 and the control module 110, and is used to receive the driving signal sent by the control module 110 to drive the driving unit 131 to reciprocate, so that the copper rod electrode 134 is toward or away from the carbon rod electrode 133. In one example, the driving unit of the arc generator 130 is a stepper motor, and the driving module 150 can be a stepper motor driving circuit, which drives the reciprocating motion of the stepper motor by receiving the driving signal sent by the control module 110, thereby driving the copper rod electrode 134 toward or away from the carbon rod electrode 133. The current detection module 160 is respectively connected to the driving module 150, the arc generator 130 and the control module 110, and is used to detect the current of the driving unit 131 in the reciprocating motion. This current signal is connected to the pin of the control module 110, and the current can be sent to the control module 110. After the control module 110 collects the current signal sent by the current detection module 160 , it analyzes and determines the operating state of the driving unit 131 to prevent the electrode of the driving unit 131 from being blocked.

[0069] In the embodiment of the present application, the arc generating device 100 may further include a position detection module 170, which is connected between the arc generator 130 and the control module 110, and is used to detect the position signals of the carbon rod electrode 133 and the copper rod electrode 134. Specifically, the position detection module 170 is used to detect whether the carbon rod electrode 133 and the copper rod electrode 134 are in a closed state or an open state, and the detected position signal is connected to the input pin of the control module 110, so that the control module 110 further controls the movement of the driving unit 131 according to the position signal.

[0070] In the embodiment of the present application, since the resistive load 1232 in the load converts electrical energy into thermal energy and generates a certain amount of heat, the mode switching circuit 120 further includes a cooling element for cooling the target load of the mode switching circuit 120, such as the resistive load 1232. Based on this, the arc generating device 100 may further include a temperature detection module 181 and a cooling drive module 182.

[0071] The temperature detection module 181 is connected to the control module 110 and the target load of the mode switching circuit 120 respectively, and is used to detect the temperature of the target load in the mode switching circuit 120. The temperature detection module 181 may include a temperature sensor, a thermocouple or a thermistor, etc., which can detect the temperature of the target load and send the temperature to the control module 110. After receiving the temperature data sent by the temperature detection module 181, the control module 110 can determine whether the set temperature threshold is reached. If it is higher than the temperature threshold, it outputs a cooling drive signal to the cooling drive module 182 to turn on the cooling element to cool the target load. The cooling drive module 182 is connected to the cooling elements of the control module 110 and the mode switching circuit 120 respectively, and is used to drive the cooling element according to the cooling drive signal of the control module 110 to cool the target load in the mode switching circuit 120. The control module 110 automatically cools the target load, which can improve the safety of the test circuit.

[0072] In the embodiment of the present application, the arc generating device 100 further includes an interaction module 190 connected to the control module 110 , which is used to send input interaction information to the control module 110 , and to display information sent by the control module 110 .

[0073] In one example, the interactive module 190 may include a display unit 191 and an indication unit 192. The display unit 191 is used for human-computer interaction and may be a serial port display screen, which interacts with the control module 110 through serial port communication. Further, the display unit 191 may include a "circuit connection status setting" interface and an "arc generation" interface. The "circuit connection status setting" interface is used to set the circuit connection status required for the mode switching circuit 120; the "arc generation" interface may set the settings required for starting arc generation, interrupting arc generation, arcing time, left and right movement of electrodes, etc. The display unit 191 may also be replaced by a component with a setting function such as a button. The indication unit 192 may be an indication circuit, which is used to light up a corresponding indicator light after receiving a control signal from the control module 110, such as a light-emitting diode (LED), an organic light-emitting diode (OLED), an incandescent lamp, a neon lamp, etc., so as to indicate that the arc generation device 100 enters the working mode.

[0074] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0075] The above are only embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included within the scope of the claims of the present application.

Claims

1. An arc generating device, characterized in that: It includes a control module, a mode switching circuit and an arc generator, wherein the mode switching circuit is arranged between the control module and the arc generator, and the arc generator is connected to the arc fault protector to be tested; The mode switching circuit includes a plurality of switch devices and a plurality of loads, and the plurality of switch devices are connected to the plurality of loads; The control module is connected to the multiple switching devices and is used to control the closing or releasing of the multiple switching devices so that the multiple loads and the arc generator are in different loop connection states to test the arc suppression load shielding test of the arc fault protector to be tested.

2. The arc generating device according to claim 1, characterized in that: The plurality of switch devices include a plurality of switch groups, each switch group corresponding to a load; Each switch group comprises a first switch device and a second switch device connected in sequence, wherein a normally open end of the first switch device is connected to the arc fault protector to be tested, a normally closed end of the first switch device is connected to the arc generator, the second switch device is connected between the first switch device and a first end of the load, and a second end of the load is connected to the arc fault protector to be tested; For each switch group, when the first switch device and the second switch device are both energized, the corresponding load is connected to the arc fault protector to be tested; when the second switch device is energized but the first switch device is released, the corresponding load is connected to the arc generator; when the second switch device is released, the corresponding load is not connected to the arc fault protector to be tested and the arc generator.

3. The arc generating device according to claim 1, characterized in that: The arc generating device further comprises a switch device driving module connected between the mode switching circuit and the control module, and used for receiving a switching signal sent by the control module to drive the plurality of switch devices to be attracted or released.

4. The arc generating device according to claim 1, characterized in that: The multiple loads include shielded loads and resistive loads, and the loop connection state includes: The shielding load is connected to the arc generator; The shielding load is connected between the arc generator and the arc fault protector to be tested, and the resistive load is connected to the arc generator; The resistive load is connected between the arc generator and the arc fault protector to be tested, and the shielding load is connected to the arc generator; The shielding load and the resistive load are both connected to the arc generator.

5. The arc generating device according to claim 4, characterized in that: The arc fault protector to be tested includes a first outlet terminal and a second outlet terminal, the arc generator includes a carbon rod electrode and a copper rod electrode, and the plurality of switch devices include a first relay, a second relay, a third relay and a fourth relay; The first normally open end of the first relay is connected to the first outlet terminal of the arc fault protector to be tested, and the first normally closed end of the first relay is connected to the copper rod electrode of the arc generator; The second common terminal of the second relay is connected to the first common terminal of the first relay, and the second normally open terminal of the second relay is connected to the first terminal of the resistive load; or, the second common terminal of the second relay is connected to the first terminal of the resistive load, and the second normally open terminal of the second relay is connected to the first common terminal of the first relay; The third normally open end of the third relay is connected to the first outlet terminal of the arc fault protector to be tested, and the third normally closed end of the third relay is connected to the copper rod electrode of the arc generator; The fourth common terminal of the fourth relay is connected to the third common terminal of the third relay, and the fourth normally-open terminal of the fourth relay is connected to the first terminal of the shielding load; or, the fourth common terminal of the fourth relay is connected to the first terminal of the shielding load, and the fourth normally-open terminal of the fourth relay is connected to the third common terminal of the third relay; The second end of the resistive load is respectively connected to the second end of the shielding load and the second outlet terminal of the arc fault protector to be tested.

6. The arc generating device according to claim 5, characterized in that: The arc generator also includes a base, a driving unit and a moving unit, wherein the moving unit is arranged on the base, and the driving unit is connected to the moving unit and drives the moving unit to move on the base; the carbon rod electrode is fixed at one end of the base, and the copper rod electrode is installed on the moving unit; the copper rod electrode drives the moving unit to move toward or away from the carbon rod electrode under the drive of the driving unit, thereby cooperating with the carbon rod electrode to generate an arc.

7. The arc generating device according to claim 6, characterized in that: The arc generating device further comprises: A driving module, connected between the arc generator and the control module, and configured to receive a driving signal sent by the control module to drive the driving unit to reciprocate, thereby causing the copper rod electrode to move toward or away from the carbon rod electrode; The current detection module is respectively connected to the driving module, the driving unit and the control module, and is used to detect the current of the driving unit in the reciprocating motion and send the current to the control module.

8. The arc generating device according to claim 6, characterized in that: The arc generating device further comprises: The position detection module is connected between the arc generator and the control module and is used to detect the position signals of the carbon rod electrode and the copper rod electrode.

9. The arc generating device according to claim 1, characterized in that: The mode switching circuit further includes a cooling element for cooling the target load of the mode switching circuit, and the arc generating device further includes: A temperature detection module, connected to the control module and the target load of the mode switching circuit respectively, and used to detect the temperature of the target load in the mode switching circuit; The cooling drive module is connected to the control module and the cooling element of the mode switching circuit respectively, and is used to drive the cooling element according to the cooling drive signal of the control module to cool the target load in the mode switching circuit.

10. The arc generating device according to claim 1, characterized in that: The arc generating device further comprises: The interaction module is connected to the control module and is used to send the input interaction information to the control module and display the display information sent by the control module.

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