Performance detection device and performance detection method of thyristor module

Abstract

The present application discloses a performance detection device and a performance detection method for a thyristor module, the performance detection device comprising: the positive electrode of the power supply end is connected to one end of the power indicator light through a first current limiting resistor, connected to one end of the test indicator light through a reset switch, and is also respectively connected to the input end of the voltage stabilizing module, the trigger circuit, and one end of the setting switch, the other end of the power indicator light is connected to the relay assembly, the trigger circuit, and the negative electrode of the power supply end; the other end of the test indicator light is connected to the relay assembly; the output end of the voltage stabilizing module is connected to the thyristor module through a second current limiting resistor and a micro switch, and the other end of the setting switch is respectively connected to the trigger circuit and the relay assembly; the trigger circuit is also connected to the ground end of the voltage stabilizing module, the relay assembly is also connected to the thyristor module, and the negative electrode of the power supply end is also connected to the relay assembly. The performance detection device in the present application greatly improves the detection accuracy of the thyristor module.

Description

Technical Field

[0001] The present application relates to the technical field of thyristors, and in particular to a performance detection device and a performance detection method for a thyristor module. Background Art

[0002] With the continuous development of electronic technology, thyristors, as an integrated semiconductor device, have been increasingly used in automation control systems, especially in high-voltage ball mill excitation control systems, due to their advantages of small size, high efficiency, and long life. In the ball mill excitation control system, the excitation control cabinet can adjust the current of the excitation winding by controlling the conduction angle of the thyristor, thereby controlling the magnetic field strength of the rotor of the ball mill high-voltage motor, so that the ball mill can run stably to adapt to the change of load, and quickly adjust or cut off the excitation current when the motor has abnormal conditions such as overcurrent or overvoltage, effectively preventing equipment damage and thus ensuring production safety. In order to ensure the stability and reliability of the entire system, it is particularly important to study the detection of thyristors.

[0003] At present, when the thyristor module includes A, K, and G control electrodes, the related art uses a pointer multimeter to detect thyristor faults, uses the resistance x1k gear, measures the resistance value between A and K in the forward or reverse direction, and determines whether they are both close to infinity, and uses the resistance x10Ω gear to measure the resistance value between G and K, and determines whether the thyristor is faulty based on the resistance value. However, in this solution, when A and K are already in a fault open circuit state, it is impossible to detect whether the control electrode is good or bad, and some resistance values ​​between G and K are also very small, making it difficult to determine whether there is a short circuit between the two control electrodes, resulting in low accuracy in thyristor detection. Summary of the invention

[0004] The purpose of the present application is to provide a performance detection device and a performance detection method for a thyristor module.

[0005] To achieve the above objectives, this application provides the following solutions:

[0006] In a first aspect, the present application provides a performance detection device for a thyristor module, comprising:

[0007] A power supply terminal, a power indicator light, a test indicator light, a voltage stabilizing module, a set switch, a reset switch, a micro switch, a first current limiting resistor, a second current limiting resistor, a relay assembly, a trigger circuit and a controller;

[0008] The positive electrode of the power supply end is connected to one end of the power indicator light through the first current limiting resistor, connected to one end of the test indicator light through the reset switch, and is also connected to the input end of the voltage stabilizing module, the trigger circuit, and one end of the setting switch, and the other end of the power indicator light is connected to the relay assembly, the trigger circuit, and the negative electrode of the power supply end; the other end of the test indicator light is connected to the relay assembly; the output end of the voltage stabilizing module is connected to one end of the micro switch through the second current limiting resistor, the other end of the micro switch is connected to the thyristor module, and the other end of the setting switch is respectively connected to the trigger circuit and the relay assembly; the trigger circuit is also connected to the ground end of the voltage stabilizing module, the relay assembly is also connected to the thyristor module, and the negative electrode of the power supply end is also connected to the relay assembly;

[0009] The controller is used to: when the setting switch is in an open or closed state, obtain first on-off information of the test indicator light according to the on-off state of the micro switch, and obtain second on-off information of the test indicator light according to the first on-off information and the on-off state of the reset switch, and judge whether the thyristor module is faulty according to the second on-off information.

[0010] Optionally, the micro switch includes an upper bridge test switch and a lower bridge test switch; the second current limiting resistor is respectively connected to one end of the upper bridge test switch and one end of the lower bridge test switch, the other end of the lower bridge test switch is connected to the first terminal of the thyristor module, and the other end of the upper bridge test switch is connected to the second terminal of the thyristor module;

[0011] The controller is specifically used for: when the setting switch is in an open state and the lower bridge test switch is in a closed state, obtaining first on / off information of the test indicator light, obtaining second on / off information of the test indicator light according to the first on / off information and the on / off state of the reset switch, and judging whether the lower bridge of the thyristor module is faulty according to the second on / off information; or,

[0012] When the setting switch is in a closed state and the upper bridge test switch is in a closed state, first on-off information of the test indicator light is obtained, and based on the first on-off information and the on-off state of the reset switch, second on-off information of the test indicator light is obtained, and based on the second on-off information, it is determined whether the upper bridge of the thyristor module is faulty.

[0013] Optionally, the relay assembly includes a first relay, a second relay and a third relay;

[0014] The other end of the power indicator light is respectively connected to the first pin of the first relay, the fifth pin of the second relay, and the first pin of the third relay; the other end of the test indicator light is respectively connected to the third pin of the first relay, the fourth pin of the second relay, and the third pin of the third relay; the negative pole of the power supply end is respectively connected to the fourth pin of the first relay, the third pin of the second relay, and the fourth pin of the third relay; the other end of the setting switch is respectively connected to the fifth pin of the first relay, the first pin of the second relay, and the fifth pin of the third relay; the second pin of the first relay is connected to the third terminal of the thyristor module, the second pin of the second relay is connected to the fourth terminal of the thyristor module, and the second pin of the third relay is connected to the fifth terminal of the thyristor module.

[0015] Optionally, the second pin of the first relay is connected to the fourth pin of the first relay, the second pin of the second relay is connected to the fourth pin of the second relay, and the second pin of the third relay is connected to the fourth pin of the third relay.

[0016] Optionally, the trigger circuit includes: a diode and a capacitor, the positive electrode of the power supply end is connected to one end of the capacitor, the anode of the diode is respectively connected to the other end of the capacitor, the first pin of the first relay, and the fifth pin of the second relay; the cathode of the diode is respectively connected to the other end of the setting switch, the fifth pin of the first relay, the first pin of the second relay, and the fifth pin of the third relay.

[0017] Optionally, the performance detection device of the controllable scale block further includes: a first test line clamp, a second test line clamp, a third test line clamp, a fourth test line clamp and a fifth test line clamp;

[0018] The other end of the lower bridge test switch is connected to the first terminal of the thyristor module through the first test clip, the other end of the upper bridge test switch is connected to the second terminal of the thyristor module through the second test clip, the second pin of the first relay is connected to the third terminal of the thyristor module through the third test clip, the second pin of the second relay is connected to the fourth terminal of the thyristor module through the fourth test clip, and the second pin of the third relay is connected to the fifth terminal of the thyristor module through the fifth test clip.

[0019] Optionally, the controller is further configured to:

[0020] When the setting switch is in an open state, the lower bridge test switch is in a closed state, and the first on-off information indicates that the test indicator light is in a lit state, controlling the lower bridge test switch to be in an open state;

[0021] When the test indicator light continues to be in the lighting state, controlling the reset switch to be in the closed state, and obtaining the second lighting information of the test indicator light;

[0022] When the second on-off information indicates that the test indicator light is in an off state, controlling the reset switch to be in an on state;

[0023] When the test indicator light continues to be off, the lower bridge of the thyristor module is normal.

[0024] Optionally, the controller is further configured to:

[0025] When the setting switch is in a closed state, the upper bridge test switch is in a closed state, and the first on-off information indicates that the test indicator light is in a lit state, controlling the upper bridge test switch to be in an open state;

[0026] When the test indicator light continues to be in the lighting state, controlling the reset switch to be in the closed state, and obtaining the second lighting information of the test indicator light;

[0027] When the second on-off information indicates that the test indicator light is in an off state, controlling the reset switch to be in an on state;

[0028] When the test indicator light continues to be off, the upper bridge of the thyristor module is normal.

[0029] In a second aspect, an embodiment of the present application provides a performance detection method, which is applied to a performance detection device of a thyristor module. The performance detection method includes:

[0030] When the setting switch is in an open or closed state, first on / off information of the test indicator light is obtained according to the on / off state of the micro switch;

[0031] Acquire second on / off information of the test indicator light according to the first on / off information and the on / off state of the reset switch;

[0032] According to the second on-off information, it is determined whether the thyristor module fails.

[0033] According to the specific embodiments provided in this application, this application discloses the following technical effects:

[0034] The present application provides a performance detection device and a performance detection method for a thyristor module, the performance detection device of the thyristor module comprising: a power supply end, a power indicator light, a test indicator light, a voltage stabilizing module, a setting switch, a reset switch, a micro switch, a first current limiting resistor, a second current limiting resistor, a relay assembly, a trigger circuit and a controller, the positive electrode of the power supply end is connected to one end of the power indicator light through the first current limiting resistor, is connected to one end of the test indicator light through the reset switch, and is also connected to the input end of the voltage stabilizing module, the trigger circuit, and one end of the setting switch, the other end of the power indicator light is connected to the relay assembly, the trigger circuit, and the negative electrode of the power supply end; the other end of the test indicator light is connected to the relay assembly The output end of the voltage stabilizing module is connected to one end of the micro switch through a second current limiting resistor, the other end of the micro switch is connected to the thyristor module, and the other end of the setting switch is respectively connected to the trigger circuit and the relay assembly; the trigger circuit is also connected to the ground end of the voltage stabilizing module, the relay assembly is also connected to the thyristor module, and the negative pole of the power supply end is also connected to the relay assembly; the controller is used for: when the setting switch is in an open or closed state, according to the on-off state of the micro switch, obtaining the first on-off information of the test indicator light, and according to the first on-off information and the on-off state of the reset switch, obtaining the second on-off information of the test indicator light, and judging whether the thyristor module is faulty according to the second on-off information. Compared with the prior art, the performance detection device of the thyristor module of the present application can provide working power for the operation process of the entire circuit and indicate it in real time through the power indicator light by setting the power supply terminal and the power indicator light, and provide the trigger voltage for the trigger circuit through the voltage regulator module, and control the working state of the relay assembly through the setting switch, and the micro switch controls the test function of the thyristor module. Its circuit structure is simple and reliable with strong practicality. It does not need to consider the resistance value between each control electrode in the thyristor module. It can automatically control the on-off state of the setting switch, micro switch and reset switch through the controller, and obtain the first on-off information and the second on-off information of the test indicator light, so as to accurately judge whether the thyristor module is faulty according to the situation of the test indicator light, which greatly improves the detection accuracy of the thyristor module and is suitable for the status detection of the thyristor module in the excitation cabinet of the on-site ball mill. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0036] Figure 1 A schematic diagram of the structure of a performance detection device for a thyristor module provided in one embodiment of the present application;

[0037] Figure 2 A schematic structural diagram of a performance detection device for a thyristor module provided in another embodiment of the present application;

[0038] Figure 3 A schematic structural diagram of a performance detection device for a thyristor module provided in another embodiment of the present application;

[0039] Figure 4 A schematic diagram of a performance testing method according to an embodiment of the present invention;

[0040] Description of reference numerals:

[0041] Power supply terminal -10, power indicator light -11, first current limiting resistor -12, reset switch -13, trigger circuit -20, diode -21, capacitor -22, test indicator light -30, set switch -41, voltage regulator module -42, first relay -43, second relay -44, third relay -45, micro switch -50, lower bridge test switch -51, upper bridge test switch -52, second current limiting resistor -53, controller -60. DETAILED DESCRIPTION

[0042] 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 ordinary technicians in this field without creative work are within the scope of protection of this application.

[0043] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, the present application is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0044] As mentioned in the background technology, in the related technology, a pointer multimeter is used to detect the fault of the thyristor. The resistance value between A and K is measured in the forward or reverse direction using the resistance x1k gear to determine whether they are both close to infinity, and the resistance value between G and K is measured using the resistance x10Ω gear to determine whether the thyristor is faulty based on the resistance value. However, in this scheme, when A and K are already in a fault open circuit state, it is impossible to detect whether the control electrode is good or bad, and some resistance values ​​between G and K are also very small, making it difficult to determine whether a short circuit occurs between the two control electrodes, resulting in low accuracy in detecting the thyristor.

[0045] Based on the above defects, an embodiment of the present application provides a performance detection device for a thyristor module. Compared with the prior art, the performance detection device for the thyristor module of the present application can provide working power for the operation process of the entire circuit and indicate it in real time through the power indicator light by setting a power supply terminal and a power indicator light, and provide a trigger voltage for the trigger circuit through a voltage regulator module, and control the working state of the relay assembly through a set switch, and control the test function of the thyristor module through a micro switch. The circuit structure is simple and reliable with strong practicality. It does not need to consider the resistance value between each control electrode in the thyristor module. The on-off state of the set switch, micro switch and reset switch can be automatically controlled by a controller, and the first on-off information and the second on-off information of the test indicator light can be obtained, so as to accurately judge whether the thyristor module is faulty according to the situation of the test indicator light, greatly improving the detection accuracy of the thyristor module, and is suitable for the status detection of the thyristor module in the excitation cabinet of the on-site ball mill.

[0046] See also Figure 1 As shown, Figure 1 A schematic diagram of the structure of a performance detection device for a thyristor module provided in an embodiment of the present application, wherein the performance detection device for the thyristor module comprises: a power supply terminal 10, a power indicator light 11, a test indicator light 30, a voltage stabilizing module 42, a set switch 41, a reset switch 13, a micro switch 50, a first current limiting resistor 12, a second current limiting resistor 53, a relay assembly, a trigger circuit 20 and a controller 60;

[0047] The positive pole of the power supply terminal 10 is connected to one end of the power indicator light 11 through the first current limiting resistor 12, and to one end of the test indicator light 30 through the reset switch 13, and is also connected to the input end of the voltage stabilizing module 42, the trigger circuit 20, and one end of the setting switch 41 respectively. The other end of the power indicator light 11 is connected to the relay assembly, the trigger circuit 20, and the negative pole of the power supply terminal 10; the other end of the test indicator light 30 is connected to the relay assembly; the output end of the voltage stabilizing module 42 is connected to one end of the micro switch 50 through the second current limiting resistor 53, the other end of the micro switch 50 is connected to the thyristor module, and the other end of the setting switch 41 is respectively connected to the trigger circuit 20 and the relay assembly; the trigger circuit 20 is also connected to the ground end of the voltage stabilizing module 42, the relay assembly is also connected to the thyristor module, and the negative pole of the power supply terminal 10 is also connected to the relay assembly.

[0048] The controller 60 is used to: when the setting switch 41 is in an open or closed state, obtain the first on-off information of the test indicator light 30 according to the on-off state of the micro switch 50, and obtain the second on-off information of the test indicator light 30 according to the first on-off information and the on-off state of the reset switch 13, and judge whether the thyristor module is faulty according to the second on-off information.

[0049] It should be noted that the power supply terminal 10 is a VCC terminal, which is a connection terminal with an external power supply device. The VCC terminal is connected to the external power supply device. The external power supply device can be, for example, a 12V power supply, which is used to provide power for the performance detection device of the thyristor module for power supply. The power indicator light 11 is a device for indicating the power status, which is used to indicate whether the power supply device is turned on, so as to determine whether the performance detection device is in a powered state. Among them, the power indicator light 11 can include an LED power supply inside, and the LED light source can include multiple colors, namely red, green, and yellow. For example, red is used to indicate that the performance detection device is in a normal power supply state, green is used to indicate that the performance detection device is in an abnormal power supply state, and yellow is used to indicate that the performance detection device is in a standby or low power state.

[0050] The test indicator light 30 is an indicator tool for testing whether a circuit is powered, whether a signal exists, or whether a performance detection device is working properly. The test indicator light 30 includes an LED light source inside. The LED light source can present one color, two colors, or multiple colors. When it is multiple colors, it can include red and green, for example. Optionally, when the thyristor module is normal, the test indicator light 30 can emit red light; when the thyristor module fails, the test indicator light 30 can emit green light or no light.

[0051] The voltage stabilizing module 42 is an electronic circuit module, and its main function is to keep the output voltage stable when the input voltage changes or the load current changes, and can effectively reduce the voltage fluctuation, so as to provide a relatively stable power supply environment for the performance detection device of the thyristor module. The voltage stabilizing module 42 is, for example, a three-terminal voltage stabilizing module 42, including an input terminal, an output terminal and a ground terminal, and can be L7806C. Since one end of the voltage stabilizing module 42 is connected to the trigger circuit 20, the voltage provided by the external power supply can be stepped down to a trigger voltage by the voltage stabilizing module 42.

[0052] The above-mentioned setting switch 41 sets the performance detection device of the thyristor module to a specific "setting" state, which is usually an activated, turned on or preset state. The setting switch 41 can be, for example, an upper and lower bridge selection switch. The main function of the above-mentioned reset switch 13 is to restore the state of the performance detection device to the initial state or default state. It is a tool for clearing the existing state, restarting or resolving fault recovery.

[0053] The first current limiting resistor 12 and the second current limiting resistor 53 are resistors used to limit the current size. Their main purpose is to prevent the current in the circuit from being too large, avoid damaging electronic components or ensure that the circuit works according to the design requirements. The positive pole of the power supply terminal 10 is connected to the power indicator light 11 through the first current limiting resistor 12. Since the current that the power indicator light 11 itself can withstand is limited, by connecting a first current limiting resistor 12 in series between the positive pole of the power supply terminal 10 and the power indicator light 11, the current passing through the power indicator light 11 can be controlled so that it works within a safe range. By providing a second current limiting resistor 53 between the voltage stabilizing module 42 and the micro switch 50, the current passing through the micro switch 50 can be controlled. It is in normal working state.

[0054] The relay assembly may include multiple groups of independent relays, for example, three groups of relays, each of which has different functions and is used to control the on and off of the corresponding branch. The relay may be a five-pin relay. The relay assembly is used to realize electrical isolation function, signal conversion function, automatic control function and protection function.

[0055] In this embodiment, the controller 60 can establish a signal connection with the setting switch 41, the micro switch 50, and the reset switch 13, and control the on and off states of the setting switch 41, the micro switch 50, and the reset switch 13 in real time. The number of micro switches 50 can be one or two, and different micro switches 50 control different branches to achieve different detection functions. The controller 60 can also obtain the on and off information of the test indicator light 30 in real time to determine whether the thyristor module is faulty according to the on and off information.

[0056] Specifically, after the performance detection device is connected to the external power supply and the thyristor module, the controller 60 first controls the setting switch 41 to open, so that the setting switch 41 is in the open state, and the positive pole of the power supply terminal 10 is connected to the thyristor module through the reset switch 13, the test indicator light 30, and the relay assembly. The controller 60 controls the microswitch 50 to close, so that the microswitch 50 is in the closed state, and then obtains the first on-off information of the test indicator light 30. When the first on-off information indicates that the test indicator light 30 is in the lit state, the microswitch 50 is controlled to open, so that the microswitch 50 is in the open state. When the first on-off information of the test indicator light 30 is in the off state, the reset switch 13 is controlled to close, and then the second on-off information of the test indicator light 30 is obtained. When the second on-off information indicates that the test indicator light 30 is in the off state, the reset switch 13 is controlled to open, and the second on-off information of the test indicator light 30 is continued to be obtained. When the test indicator light 30 continues to remain in the off state, it is determined that the thyristor module is normal; when any of the above test states cannot be met, it is determined that the thyristor module is abnormal. Among them, the first on-off information is used to represent the status information corresponding to the test indicator light 30 after controlling the micro switch 50, which may include a lit state or an off state; the second on-off information is used to represent the status information corresponding to the test indicator light 30 after controlling the reset switch 13, which may include a lit state or an off state.

[0057] It should be noted that after the microswitch 50 is in the closed state, when the first on-off information indicates that the test indicator light 30 is in the off state, it indicates that the thyristor module has an abnormality; or after the control reset switch 13 is closed, when the second on-off information indicates that the test indicator light 30 is in the lit state, it indicates that the thyristor module has an abnormality; or after the control reset switch 13 is opened, when the second on-off information is in the lit state, it indicates that the thyristor module has an abnormality.

[0058] The present application provides a performance detection device for a thyristor module, which includes: a power supply terminal 10, a power indicator light 11, a test indicator light 30, a voltage stabilizing module 42, a set switch 41, a reset switch 13, a micro switch 50, a first current limiting resistor 12, a second current limiting resistor 53, a relay assembly, a trigger circuit 20 and a controller 60. The positive electrode of the power supply terminal 10 is connected to one end of the power indicator light 11 through the first current limiting resistor 12, and the other end of the power indicator light 11 is connected to the relay assembly, the trigger circuit 20, and the negative electrode of the power supply terminal 10; the positive electrode of the power supply terminal 10 is also connected to one end of the test indicator light 30 through the reset switch 13, and the other end of the test indicator light 30 is connected to the relay assembly; the positive electrode of the power supply terminal 10 is also connected to the input end of the voltage stabilizing module 42, the trigger circuit 20 and the controller 60. The circuit 20 is connected to one end of the setting switch 41, the output end of the voltage stabilizing module 42 is connected to one end of the microswitch 50 through the second current limiting resistor 53, the other end of the microswitch 50 is connected to the thyristor module, and the other end of the setting switch 41 is respectively connected to the trigger circuit 20 and the relay assembly; the trigger circuit 20 is also connected to the ground end of the voltage stabilizing module 42, the relay assembly is also connected to the thyristor module, and the negative pole of the power supply terminal 10 is also connected to the relay assembly; the controller 60 is used for: when the setting switch 41 is in an open or closed state, according to the on-off state of the microswitch 50, obtaining the first on-off information of the test indicator light 30, and according to the first on-off information and the on-off state of the reset switch 13, obtaining the second on-off information of the test indicator light 30, and judging whether the thyristor module is faulty according to the second on-off information. Compared with the prior art, the performance detection device of the thyristor module of the present application can provide working power for the operation process of the entire circuit and indicate it in real time through the power indicator light 11 by setting the power supply terminal 10 and the power indicator light 11, and provide the trigger voltage for the trigger circuit 20 through the voltage regulator module 42, and control the working state of the relay assembly through the setting switch 41, and the micro switch 50 controls the test function of the thyristor module. Its circuit structure is simple and reliable, and its practicality is strong. It does not need to consider the resistance value between each control electrode in the thyristor module. It can automatically control the on and off state of the setting switch 41, the micro switch 50, and the reset switch 13 through the controller 60, and obtain the first on and off information and the second on and off information of the test indicator light 30, so as to accurately judge whether the thyristor module is faulty according to the situation of the test indicator light 30, thereby greatly improving the detection accuracy of the thyristor module.

[0059] In one embodiment, see Figure 2 As shown, Figure 2A schematic diagram of the structure of the performance detection device of the thyristor module provided in the embodiment of the present application. The micro switch 50 may include an upper bridge test switch 52 and a lower bridge test switch 51, the second current limiting resistor 53 is respectively connected to one end of the upper bridge test switch 52 and one end of the lower bridge test switch 51, the other end of the lower bridge test switch 51 is connected to the first terminal of the thyristor module, and the other end of the upper bridge test switch 52 is connected to the second terminal of the thyristor module.

[0060] The controller 60 is specifically used for: when the setting switch 41 is in the open state and the lower bridge test switch 51 is in the closed state, obtaining the first on-off information of the test indicator light 30, obtaining the second on-off information of the test indicator light 30 according to the first on-off information and the on-off state of the reset switch 13, and judging whether the lower bridge of the thyristor module is faulty according to the second on-off information; or,

[0061] When the setting switch 41 is in a closed state and the upper bridge test switch 52 is in a closed state, the first on-off information of the test indicator light 30 is obtained, and the second on-off information of the test indicator light 30 is obtained based on the first on-off information and the on-off state of the reset switch 13, and based on the second on-off information, it is determined whether the upper bridge of the thyristor module is faulty.

[0062] It should be noted that the 12V power supply is used as the working power supply of the performance detection device, the power indicator light 11 can be a red LED light source, the test indicator light 30 uses a 12V10W light source, and the voltage regulator module 42 can be a three-terminal voltage regulator module, such as L7806cv, which is used to provide a trigger voltage for the trigger circuit 20. When the setting switch 41 is an upper and lower bridge selection switch, the upper and lower bridge selection switch controls the working state of the relay assembly, and the reset switch 13 is used to implement the reset function. The upper bridge test switch 52 is used to control the upper bridge test process of the thyristor module, and the lower bridge test switch 51 is used to control the lower bridge test process of the thyristor module. The voltage regulator module 42 is connected to the first terminal of the thyristor module through the second current limiting resistor 53 and the lower bridge test switch 51, and is connected to the second terminal of the thyristor module through the second current limiting resistor 53 and the upper bridge test switch 52.

[0063] Optionally, the relay assembly includes multiple independent relays, namely a first relay 43, a second relay 44 and a third relay 45, the first relay 43 includes five pins, the second relay 44 includes five pins, the third relay 45 includes five pins, and each pin has a different function.

[0064] The other end of the power indicator light 11 is respectively connected to the first pin of the first relay 43, the fifth pin of the second relay 44, and the first pin of the third relay 45. The other end of the test indicator light 30 is respectively connected to the third pin of the first relay 43, the fourth pin of the second relay 44, and the third pin of the third relay 45; the negative pole of the power supply terminal 10 is respectively connected to the fourth pin of the first relay 43, the third pin of the second relay 44, and the fourth pin of the third relay 45; the other end of the setting switch 41 is respectively connected to the fifth pin of the first relay 43, the first pin of the second relay 44, and the fifth pin of the third relay 45; the second pin of the first relay 43 is connected to the third terminal of the thyristor module, the second pin of the second relay 44 is connected to the fourth terminal of the thyristor module, and the second pin of the third relay 45 is connected to the fifth terminal of the thyristor module.

[0065] The second pin of the first relay 43 is connected to the fourth pin of the first relay 43 , the second pin of the second relay 44 is connected to the fourth pin of the second relay 44 , and the second pin of the third relay 45 is connected to the fourth pin of the third relay 45 .

[0066] It can be understood that the second pin of the first relay 43 is a common pin, the fourth pin is a normally closed pin, and the third pin is a normally open pin; similarly, the second pin of the second relay 44 is a common pin, the third pin is a normally open pin, and the fourth pin is a normally closed pin; the second pin of the third relay 45 is a common pin, the fourth pin is a normally closed pin, and the third pin is a normally open pin.

[0067] Taking the setting switch 41 as the upper and lower bridge selection switch as an example, when the performance detection device is connected to the external power supply through the power supply terminal 10 and connected to the thyristor module, the controller 60 controls the upper and lower bridge selection switch to be in the open position, and the positive pole of the power supply terminal 10 passes through the first current limiting resistor 12 and the power indicator light 11 to the negative pole of the power supply terminal 10. The power indicator light 11 emits a bright red light. The positive pole of the power supply is connected in series with the test indicator light 30 through the reset switch 13, and is respectively connected to the first pin of the first relay 43, the fifth pin of the second relay 44, and the first pin of the third relay 45. The positive pole of the power supply is connected in series through the reset switch 13 and the test indicator light 30 and then connected to the third pin of the first relay 43, the fourth pin of the second relay 44, and the third pin of the third relay 45. The negative pole of the power supply terminal 10 is connected to the fourth pin of the first relay 43, the third pin of the second relay 44, and the fourth pin of the third relay 45 respectively. The other end of the upper and lower bridge selection switch is connected to the fifth pin of the first relay 43, the first pin of the second relay 44, and the fifth pin of the third relay 45 respectively; the second pin of the first relay 43 is connected to the third terminal of the thyristor module, the second pin of the second relay 44 is connected to the fourth terminal of the thyristor module, and the second pin of the third relay 45 is connected to the fifth terminal of the thyristor module.

[0068] As an implementable method, during the fault detection process of the lower bridge of the thyristor module, the controller 60 controls the upper and lower bridge selection switches to be in an open state, that is, the upper and lower bridge selection switches are in a disconnected position, the positive pole of the power supply terminal 10 is connected to the fourth terminal of the thyristor module through the reset switch 13, the test indicator light 30, and the second relay 44, and the negative pole of the power supply terminal 10 is connected to the fifth terminal of the thyristor module through the third relay 45. The controller 60 controls the lower bridge test switch 51 to be in a closed state, obtains the first on and off information of the test indicator light 30, and when the first on and off information indicates that the test indicator light 30 is in a lit state, the controller 60 controls the lower bridge test switch 51 to be in a closed state. The lower bridge test switch 51 is controlled to be in an open state. If the test indicator light 30 continues to remain in a lit state, that is, the test indicator light 30 is not extinguished, the reset switch 13 is controlled to be in a closed state, and the second on-off information of the test indicator light 30 is obtained. When the second on-off information indicates that the test indicator light 30 is in an extinguished state, the reset switch 13 is controlled to be in an open state, and the second on-off information of the test indicator light 30 continues to be obtained. When the test indicator light 30 continues to remain in an extinguished state, it indicates that the lower bridge of the thyristor module is normal. If the above test state cannot be met, it indicates that the lower bridge of the thyristor module is abnormal and cannot be used normally.

[0069] As another achievable method, during the fault detection process of the upper bridge of the thyristor module, the controller 60 controls the upper and lower bridge selection switches to be in a closed state, that is, the upper and lower bridge selection switches are in the on position, the positive pole of the power supply terminal 10 is connected to the third terminal of the thyristor module through the reset switch 13, the test indicator light 30, and the first relay 43, and the negative pole of the power supply terminal 10 is connected to the fourth terminal of the thyristor module through the second relay 44. The controller 60 controls the upper bridge test switch 52 to be in a closed state, and obtains the first on and off information of the test indicator light 30. When the first on and off information indicates that the test indicator light 30 is in a lit state, then Control the upper bridge test switch 52 to be in the open state. If the test indicator light 30 continues to remain in the lit state, that is, the test indicator light 30 is not extinguished, control the reset switch 13 to be in the closed state, and obtain the second on-off information of the test indicator light 30. When the second on-off information indicates that the test indicator light 30 is in the extinguished state, control the reset switch 13 to be in the open state, and continue to obtain the second on-off information of the test indicator light 30. When the test indicator light 30 continues to remain in the extinguished state, it indicates that the upper bridge of the thyristor module is normal. If the above test state cannot be met, it indicates that the upper bridge of the thyristor module is abnormal and cannot be used normally.

[0070] In this embodiment, by setting the upper bridge test switch 52, the lower bridge test switch 51, the upper and lower bridge selection switches, the first relay 43, the second relay 44 and the third relay 45, the upper bridge test switch 52 and the lower bridge test switch 51 can be used to automatically control the upper bridge or lower bridge fault detection of the thyristor module, and during the upper bridge or lower bridge test of the thyristor module, the upper and lower bridge selection switches are used to automatically control the operation of the corresponding relays in the three groups of relays, thereby constructing an effective detection circuit, accurately realizing the upper and lower bridge tests of the thyristor module, improving the accuracy of fault detection, and further improving the fault detection efficiency.

[0071] In one of the embodiments, in one of the embodiments, please continue to see Figure 3 As shown, the trigger circuit 20 includes: a diode 21 and a capacitor 22, the positive electrode of the power supply terminal 10 is connected to one end of the capacitor 22, the anode of the diode 21 is respectively connected to the other end of the capacitor 22, the first pin of the first relay 43, and the fifth pin of the second relay 44; the cathode of the diode 21 is respectively connected to the other end of the setting switch 41, the fifth pin of the first relay 43, the first pin of the second relay 44, and the fifth pin of the third relay 45.

[0072] It is understandable that the diode 21 can be IN4001, the capacitor 22 can be 10uF, the positive electrode of the power supply terminal 10 is connected to one end of the capacitor 22, and the other end of the capacitor 22 is connected to the ground terminal of the voltage stabilizing module 42, and is also connected to the anode of the diode 21. The capacitor 22 is mainly used to store and release charges in the circuit, and can maintain voltage stability. The series connection of the diode 21 and the capacitor 22 can achieve stable control of the voltage and prevent voltage or current mutations from damaging the circuit.

[0073] In this embodiment, the trigger circuit 20 is provided with a diode 21 and a capacitor 22, which can achieve stable control of the voltage, facilitate providing stable voltage for multiple groups of relays, thereby accurately realizing the upper and lower bridge tests of the thyristor module, and improving the accuracy of fault detection.

[0074] In one of the embodiments, the performance detection device of the controllable scale block further includes: a first test clamp, a second test clamp, a third test clamp, a fourth test clamp and a fifth test clamp.

[0075] The other end of the lower bridge test switch 51 is connected to the first terminal of the thyristor module through the first test wire clamp, the other end of the upper bridge test switch 52 is connected to the second terminal of the thyristor module through the second test wire clamp, the second pin of the first relay 43 is connected to the third terminal of the thyristor module through the third test wire clamp, the second pin of the second relay 44 is connected to the fourth terminal of the thyristor module through the fourth test wire clamp, and the second pin of the third relay 45 is connected to the fifth terminal of the thyristor module through the fifth test wire clamp.

[0076] It should be noted that the first test clip, the second test clip, the third test clip, the fourth test clip and the fifth test clip may be the same or different, and each test clip is connected to a terminal of the thyristor module.

[0077] Taking the first test clamp numbered G1, the second test clamp numbered G2, the third test clamp numbered 3, the fourth test clamp numbered K2-1, and the fifth test clamp numbered K1-2 as an example, the other end of the lower bridge test switch 51 is connected to the first terminal of the thyristor module through numbered G1, the other end of the upper bridge test switch 52 is connected to the second terminal of the thyristor module through numbered G2, the second pin of the first relay 43 is connected to the third terminal of the thyristor module through numbered 3, the second pin of the second relay 44 is connected to the fourth terminal of the thyristor module through numbered K2-1, and the second pin of the third relay 45 is connected to the fifth terminal of the thyristor module through K1-2.

[0078] In this embodiment, since multiple test wire clamps are provided between the performance detection device and each terminal of the thyristor module for connection, the line connection process can be ensured to be simpler and more convenient. On the basis of ensuring the effective connection between the thyristor module and the performance detection device, the operability is also improved.

[0079] In one embodiment, the controller 60 is further configured to:

[0080] When the setting switch 41 is in the open state, the lower bridge test switch 51 is in the closed state and the first on-off information indicates that the test indicator light 30 is in the lit state, the lower bridge test switch 51 is controlled to be in the open state; when the test indicator light 30 continues to be in the lit state, the reset switch 13 is controlled to be in the closed state, and the second on-off information of the test indicator light 30 is obtained; when the second on-off information indicates that the test indicator light 30 is in the off state, the reset switch 13 is controlled to be in the open state; when the test indicator light 30 continues to be in the off state, the lower bridge of the thyristor module is normal.

[0081] In this embodiment, after the performance detection device is connected to the thyristor module through each test clamp and connected to the external power supply through the power supply terminal 10, the power indicator light 11 emits a red light, and the controller 60 can be used to control the setting switch 41 to be in an off state. At this time, the positive electrode of the power supply is connected to the fourth terminal of the thyristor module through the reset switch 13, the test indicator light 30, and the second relay 44 by the fourth test clamp (numbered K2-1), and the negative electrode of the power supply is connected to the fifth terminal of the thyristor module through the third relay 45 by the fifth test clamp (numbered K1-2), thereby controlling the lower bridge test switch 51 to be Close, obtain the first on-off information of the test indicator light 30. When the test indicator light 30 is in the off state, it indicates that the lower bridge of the thyristor module is abnormal; when the test indicator light 30 is in the lit state, control the lower bridge test switch 51 to open, and when the test indicator light 30 continues to be in the lit state, control the reset switch 13 to be in the closed state, and obtain the second on-off information of the test indicator light 30; when the second on-off information indicates that the test indicator light 30 is in the off state, control the reset switch 13 to be in the open state; when the test indicator light 30 continues to be in the off state, the lower bridge of the thyristor module is normal. When the test indicator light 30 does not meet the above conditions, it indicates that the lower bridge of the thyristor module is abnormal.

[0082] In one embodiment, the controller 60 is further configured to:

[0083] When the setting switch 41 is in a closed state, the upper bridge test switch 52 is in a closed state and the first on-off information indicates that the test indicator light 30 is in a lit state, the upper bridge test switch 52 is controlled to be in an open state; when the test indicator light 30 continues to be in a lit state, the reset switch 13 is controlled to be in a closed state, and the second on-off information of the test indicator light 30 is obtained; when the second on-off information indicates that the test indicator light 30 is in an off state, the reset switch 13 is controlled to be in an open state; when the test indicator light 30 continues to be in an off state, the upper bridge of the thyristor module is normal.

[0084] In this embodiment, after the performance detection device is connected to the thyristor module through each test clip and connected to the external power supply through the power supply terminal 10, the power indicator light 11 emits a red light, and the controller 60 can be used to control the setting switch 41 to be in the on state. At this time, the positive electrode of the power supply is connected to the third terminal of the thyristor module through the reset switch 13, the test indicator light 30, and the first relay 43 by the third test clip (numbered 3), and the negative electrode of the power supply is connected to the fourth terminal of the thyristor module through the second relay 44 by the fourth test clip (numbered K2-1), so as to control the upper bridge test switch 52 to be closed, and obtain the first on and off information of the test indicator light 30. When the test indicator light 30 is in the lit state, the upper bridge test switch 52 is controlled to be disconnected. When the test indicator light 30 continues to be in the lit state, the reset switch 13 is controlled to be connected to obtain the second on and off information of the test indicator light 30; when the second on and off information indicates that the test indicator light 30 is in the off state, the reset switch 13 is controlled to be disconnected; when the test indicator light 30 continues to be in the off state, the upper bridge of the thyristor module is normal. When the test indicator light 30 does not meet the above conditions, it indicates that the upper bridge of the thyristor module is abnormal.

[0085] In this embodiment, the controller automatically controls the setting switch, the upper bridge control switch and the lower bridge control switch, which can effectively construct a detection circuit for the upper bridge and the lower bridge of the thyristor module, thereby improving the detection accuracy of the upper and lower bridges of the thyristor module.

[0086] On the other hand, a performance detection method is provided in an embodiment of the present application, which is applied to the performance detection device of the thyristor module provided in the above embodiment, see Figure 4 As shown, the performance detection method includes:

[0087] Step S101, when the setting switch is in an open or closed state, obtaining first on / off information of the test indicator light according to the on / off state of the micro switch;

[0088] Step S102, obtaining second on / off information of the test indicator light according to the first on / off information and the on / off state of the reset switch;

[0089] Step S103: judging whether the thyristor module fails according to the second on / off information.

[0090] It should be noted that the above-mentioned setting switch is an upper and lower bridge selection switch. The controller can control the opening or closing of the upper and lower bridge selection switches, and send a control signal to the upper and lower bridge selection switches so that the upper and lower bridge selection switches receive and respond to the control signal and perform an opening or closing operation, thereby realizing the on-off state control of the setting switch. When the upper and lower bridge selection switches are in an open state, the controller can generate a control signal and send it to the micro switch so that the micro switch receives and responds to the control signal and performs an opening or closing operation, thereby realizing the on-off state control of the micro switch, obtaining the first on-off information of the test indicator light, determining how to control the on-off state of the reset switch according to the first on-off information, and obtaining the second on-off information of the test indicator light, and then judging whether the thyristor module is faulty according to the second on-off information.

[0091] The above-mentioned micro switch includes an upper bridge test switch and a lower bridge test switch. When the setting switch is in an open or closed state, the first on and off information of the test indicator light is obtained according to the on and off state of the micro switch, including: when the setting switch is in an open state and the lower bridge test switch is in a closed state, the first on and off information of the test indicator light is obtained; or, when the setting switch is in a closed state and the upper bridge test switch is in a closed state, the first on and off information of the test indicator light is obtained.

[0092] As an implementable method, taking the setting switch as the upper and lower bridge selection switch as an example, when the upper and lower bridge selection switches are controlled to be in the open state, the lower bridge test switch is controlled to be closed, and then the first on-off information of the test indicator light is obtained. When the test indicator light is in the lit state, the lower bridge test switch is controlled to be opened. When the test indicator light continues to be in the lit state, the reset switch is controlled to be in the closed state, and the second on-off information of the test indicator light is obtained; when the second on-off information indicates that the test indicator light is in the off state, the reset switch is controlled to be in the open state. When the test indicator light continues to be in the off state, the lower bridge of the thyristor module is normal. When the test indicator light does not meet the above conditions, it indicates that the lower bridge of the thyristor module is abnormal and cannot be used normally.

[0093] As another achievable method, when the upper and lower bridge selection switches are controlled to be in the open state, the upper bridge test switch is controlled to be closed, and the first on-off information of the test indicator light is obtained. When the test indicator light is in the lit state, the upper bridge test switch is controlled to be disconnected. When the test indicator light continues to be in the lit state, the reset switch is controlled to be connected to obtain the second on-off information of the test indicator light; when the second on-off information indicates that the test indicator light is in the off state, the reset switch is controlled to be disconnected; when the test indicator light continues to be in the off state, the upper bridge of the thyristor module is normal. When the test indicator light does not meet the above conditions, it indicates that the upper bridge of the thyristor module is abnormal.

[0094] In this embodiment, the working state of the relay assembly is controlled by the setting switch, and the test function of the thyristor module is controlled by the microswitch. The circuit structure is simple, reliable and practical. There is no need to consider the resistance value between the control electrodes in the thyristor module. The on and off states of the setting switch, microswitch and reset switch can be automatically controlled by the controller, and the first on and off information and the second on and off information of the test indicator light can be obtained, so as to accurately judge whether the thyristor module is faulty according to the situation of the test indicator light, which greatly improves the detection accuracy of the thyristor module. It is suitable for the status detection of the thyristor module in the excitation cabinet of the on-site ball mill, and can quickly solve the failure of the high-voltage motor of the ball mill.

[0095] The technical features of the above embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0096] This article uses specific examples to illustrate the principles and implementation methods of this application. The description of the above embodiments is only used to help understand the method and core ideas of this application. At the same time, for those skilled in the art, according to the ideas of this application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting this application.

Claims

1. A performance detection device for a thyristor module, characterized in that: The performance detection device of the thyristor module comprises: a power supply end, a power indicator light, a test indicator light, a voltage stabilizing module, a set switch, a reset switch, a micro switch, a first current limiting resistor, a second current limiting resistor, a relay assembly, a trigger circuit and a controller; The positive electrode of the power supply end is connected to one end of the power indicator light through the first current limiting resistor, connected to one end of the test indicator light through the reset switch, and is also connected to the input end of the voltage stabilizing module, the trigger circuit, and one end of the setting switch, and the other end of the power indicator light is connected to the relay assembly, the trigger circuit, and the negative electrode of the power supply end; the other end of the test indicator light is connected to the relay assembly; the output end of the voltage stabilizing module is connected to one end of the micro switch through the second current limiting resistor, the other end of the micro switch is connected to the thyristor module, and the other end of the setting switch is respectively connected to the trigger circuit and the relay assembly; the trigger circuit is also connected to the ground end of the voltage stabilizing module, the relay assembly is also connected to the thyristor module, and the negative electrode of the power supply end is also connected to the relay assembly; The controller is used to: when the setting switch is in an open or closed state, obtain first on-off information of the test indicator light according to the on-off state of the micro switch, and obtain second on-off information of the test indicator light according to the first on-off information and the on-off state of the reset switch, and judge whether the thyristor module is faulty according to the second on-off information.

2. The performance detection device of the thyristor module according to claim 1, characterized in that: The micro switch includes an upper bridge test switch and a lower bridge test switch; the second current limiting resistor is respectively connected to one end of the upper bridge test switch and one end of the lower bridge test switch, the other end of the lower bridge test switch is connected to the first wiring terminal of the thyristor module, and the other end of the upper bridge test switch is connected to the second wiring terminal of the thyristor module; The controller is specifically used for: when the setting switch is in an open state and the lower bridge test switch is in a closed state, obtaining first on / off information of the test indicator light, obtaining second on / off information of the test indicator light according to the first on / off information and the on / off state of the reset switch, and judging whether the lower bridge of the thyristor module is faulty according to the second on / off information; or, When the setting switch is in a closed state and the upper bridge test switch is in a closed state, first on-off information of the test indicator light is obtained, and based on the first on-off information and the on-off state of the reset switch, second on-off information of the test indicator light is obtained, and based on the second on-off information, it is determined whether the upper bridge of the thyristor module is faulty.

3. The performance detection device of the thyristor module according to claim 2, characterized in that: The relay assembly includes a first relay, a second relay and a third relay; The other end of the power indicator light is respectively connected to the first pin of the first relay, the fifth pin of the second relay, and the first pin of the third relay; the other end of the test indicator light is respectively connected to the third pin of the first relay, the fourth pin of the second relay, and the third pin of the third relay; the negative pole of the power supply end is respectively connected to the fourth pin of the first relay, the third pin of the second relay, and the fourth pin of the third relay; the other end of the setting switch is respectively connected to the fifth pin of the first relay, the first pin of the second relay, and the fifth pin of the third relay; the second pin of the first relay is connected to the third terminal of the thyristor module, the second pin of the second relay is connected to the fourth terminal of the thyristor module, and the second pin of the third relay is connected to the fifth terminal of the thyristor module.

4. The performance detection device of the thyristor module according to claim 3 is characterized in that: The second pin of the first relay is connected to the fourth pin of the first relay, the second pin of the second relay is connected to the fourth pin of the second relay, and the second pin of the third relay is connected to the fourth pin of the third relay.

5. The performance detection device for the thyristor module according to claim 3, characterized in that: The trigger circuit includes: a diode and a capacitor, the positive electrode of the power supply end is connected to one end of the capacitor, the anode of the diode is respectively connected to the other end of the capacitor, the first pin of the first relay, and the fifth pin of the second relay; the cathode of the diode is respectively connected to the other end of the setting switch, the fifth pin of the first relay, the first pin of the second relay, and the fifth pin of the third relay.

6. The performance detection device for a thyristor module according to claim 3, characterized in that: The performance detection device of the controllable scale block further includes: a first test line clamp, a second test line clamp, a third test line clamp, a fourth test line clamp and a fifth test line clamp; The other end of the lower bridge test switch is connected to the first terminal of the thyristor module through the first test clip, the other end of the upper bridge test switch is connected to the second terminal of the thyristor module through the second test clip, the second pin of the first relay is connected to the third terminal of the thyristor module through the third test clip, the second pin of the second relay is connected to the fourth terminal of the thyristor module through the fourth test clip, and the second pin of the third relay is connected to the fifth terminal of the thyristor module through the fifth test clip.

7. The performance detection device of the thyristor module according to claim 2, characterized in that: The controller is also used for: When the setting switch is in an open state, the lower bridge test switch is in a closed state, and the first on-off information indicates that the test indicator light is in a lit state, controlling the lower bridge test switch to be in an open state; When the test indicator light continues to be in the lighting state, controlling the reset switch to be in the closed state, and obtaining the second lighting information of the test indicator light; When the second on-off information indicates that the test indicator light is in an off state, controlling the reset switch to be in an on state; When the test indicator light continues to be off, the lower bridge of the thyristor module is normal.

8. The performance detection device for a thyristor module according to claim 2, characterized in that: The controller is also used for: When the setting switch is in a closed state, the upper bridge test switch is in a closed state, and the first on-off information indicates that the test indicator light is in a lit state, controlling the upper bridge test switch to be in an open state; When the test indicator light continues to be in the lighting state, controlling the reset switch to be in the closed state, and obtaining the second lighting information of the test indicator light; When the second on-off information indicates that the test indicator light is in an off state, controlling the reset switch to be in an on state; When the test indicator light continues to be off, the upper bridge of the thyristor module is normal.

9. A performance detection method, characterized in that: The performance detection device for the thyristor module according to any one of claims 1 to 8, the method comprising: When the setting switch is in an open or closed state, first on / off information of the test indicator light is obtained according to the on / off state of the micro switch; Acquire second on / off information of the test indicator light according to the first on / off information and the on / off state of the reset switch; According to the second on-off information, it is determined whether the thyristor module fails.

10. The performance detection method according to claim 9, characterized in that: The micro switch includes an upper bridge test switch and a lower bridge test switch. When the setting switch is in an open or closed state, first on / off information of the test indicator light is obtained according to the on / off state of the micro switch, including: When the setting switch is in an open state and the lower bridge test switch is in a closed state, obtaining first on / off information of the test indicator light; or, When the setting switch is in a closed state and the upper bridge test switch is in a closed state, first on / off information of the test indicator light is obtained.

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