Reclosing control circuit and circuit breaker

Abstract

The utility model relates to the field of reclosing circuits, and discloses a reclosing control circuit and a circuit breaker. The circuit comprises a cost control module, a voltage signal conditioning module, a control module and a direct current motor driving module, the cost control module is used for being connected with a live wire output end and outputting a cost control signal; the voltage signal conditioning module is used for being correspondingly connected with a corresponding phase line so as to output a sampling signal; the control module is used for outputting an opening signal or a closing signal when determining that the charge control signal and / or the sampling signal is in a target level state; the direct current motor driving module is used for being connected with a direct current motor and pushing a circuit breaker connected with the direct current motor to complete a switching-on action when receiving a switching-on signal; and when an opening signal is received, the direct current motor is pushed to drive the circuit breaker to complete an opening action. According to the invention, automatic switching-on and switching-off processing in arrearage and over-voltage and under-voltage states is realized, and inconvenience caused by frequent manual switching-on due to faults or arrearage is avoided.

Description

Technical Field

[0001] The present application relates to the field of reclosing circuits, and in particular to a reclosing control circuit and a circuit breaker. Background Art

[0002] With the development of life, the functions required by products are becoming more intelligent, but the photovoltaic reclosing products currently on the market are gradually unable to meet this demand. The over-voltage and under-voltage functions of the circuit breaker can only solve the problem of damage to household appliances caused by objective factors when the voltage is too high or too low, and can also avoid some problems caused by power outages due to power system failures. However, in the daily use of users, if there are problems such as arrears due to negligence, the circuit breaker cannot close automatically and still needs to be closed manually, resulting in a low degree of automation of the circuit breaker. Utility Model Content

[0003] In a first aspect, the utility model provides a reclosing control circuit, comprising:

[0004] The fee control module includes an adapter, a first fee control unit, a second fee control unit and a third fee control unit; the third fee control unit is connected to the second fee control unit and the power supply end respectively; the first fee control unit is used to connect to the live wire output end to generate a fee control signal, and the fee control signal is transferred to the second fee control unit via the adapter and then output via the third fee control unit;

[0005] The voltage signal conditioning module comprises three-phase sampling branches, wherein the input end of each phase sampling branch is used to be connected to a corresponding phase line to obtain and generate a sampling signal according to a voltage sampling value of the corresponding phase line;

[0006] A control module, connected to the output ends of the third fee control unit and each phase sampling branch, respectively, for receiving the fee control signal and / or the sampling signal, and outputting an opening signal or a closing signal when determining that the fee control signal and / or the sampling signal is in a target level state;

[0007] The DC motor driving module is connected to the DC motor and is used to drive the DC motor to start when receiving the closing signal, so as to push the circuit breaker connected to the DC motor to complete the closing action; when receiving the opening signal, it pushes the DC motor to drive the circuit breaker to complete the opening action.

[0008] In an optional embodiment, the first fee control unit includes at least one first resistor; the second fee control unit includes at least one second resistor and a first diode; the third fee control unit includes a third resistor, a fourth resistor, a fifth resistor, a first capacitor, a second capacitor, a switch tube and a voltage regulator tube;

[0009] The input end of the first second resistor is connected to the adapter, the last second resistor is connected to the anode of the first diode, and the cathode of the first diode is connected to the cathode of the voltage regulator tube and one end of the third resistor respectively;

[0010] The first ends of the fourth resistor and the first capacitor are connected to the middle node between the base of the switch tube and the third resistor; the second ends of the fourth resistor and the first capacitor are connected to the middle node between the emitter of the switch tube and the anode of the voltage regulator tube; the emitter of the switch tube is also connected to the ground terminal;

[0011] The first end of the second capacitor is connected to the middle node between the fifth resistor and the collector of the switch tube, and the second end of the second capacitor is connected to the emitter of the switch tube; the fifth resistor is also connected to the power supply end.

[0012] In an optional implementation manner, the sampling branch of each phase includes a second diode, a sixth resistor, a seventh resistor, an eighth resistor, a third capacitor and a fourth capacitor;

[0013] The anode of the diode is used to connect to the input end of the corresponding phase line, the cathode of the second diode is connected to the first sixth resistor, and the last sixth resistor is connected to the seventh resistor and the ground terminal respectively;

[0014] A first parallel end of the eighth resistor and the third capacitor is connected to an intermediate node between the last sixth resistor and the seventh resistor, and a second parallel end of the eighth resistor and the third capacitor is connected to the ground terminal;

[0015] One end of the fourth capacitor is connected to the output end of the seventh resistor, and the other end of the fourth capacitor is connected to the second parallel end and the ground end respectively.

[0016] In an optional embodiment, a position detection module is further included; the position detection module includes a first switch control unit, a second switch control unit and a third switch control unit;

[0017] The input ends of the first switch control unit, the second switch control unit and the third switch control unit are connected to the power supply end in parallel, and the output ends of the first switch control unit, the second switch control unit and the third switch control unit are connected to the corresponding signal pins of the control module respectively;

[0018] The first switch control unit includes a first mechanical switch, which is used to input a first state signal to the control module according to the open and closed state of the first mechanical switch; the control module is used to perform the detection of the closing position of the circuit breaker according to the first state signal;

[0019] The second switch control unit includes a second mechanical switch, which is used to input a second state signal to the control module according to the open and closed state of the second mechanical switch; the control module is used to perform the detection of the closing position of the circuit breaker according to the second state signal;

[0020] The third switch control unit includes a micro switch, which is used to input a third state signal to the control module according to the open and closed state of the micro switch; the control module is used to execute the detection of whether the circuit breaker has completed closing according to the third state signal.

[0021] In an optional embodiment, the first switch control unit also includes a sixth capacitor, a seventh capacitor and an eleventh resistor; the first end of the sixth capacitor is connected to the first contact of the first mechanical switch, and is connected to the power supply end through the eleventh resistor; the second end of the sixth capacitor is respectively connected to the third contact, the fourth contact of the first mechanical switch and the first end of the seventh capacitor; the second end of the seventh capacitor is respectively connected to the second contact of the first mechanical switch and the first signal output end; the first end of the seventh capacitor is also connected to the ground end.

[0022] In an optional embodiment, the DC motor driving module includes a driving chip and a peripheral circuit connected to the driving chip; wherein the input end of the driving chip is connected to the control module, and the output end of the driving chip is used to connect to the DC motor.

[0023] In an optional embodiment, a power supply module is further included; the power supply module includes an AC / DC conversion unit and an energy storage voltage stabilization unit;

[0024] The input end of the AC / DC conversion unit is respectively connected to the three-phase line and the live line of the AC power supply, and the output end of the AC / DC conversion unit is connected to the energy storage and voltage stabilization unit;

[0025] The output end of the energy storage voltage stabilizing unit is respectively connected to the power input end of each functional module in the reclosing control circuit;

[0026] The power supply module is used to input power supply voltage to each functional module in the reclosing control circuit to supply power to the reclosing control circuit.

[0027] In an optional embodiment, the AC-DC conversion unit includes a transformer subunit and a power chip;

[0028] The transformer subunit includes a high-voltage winding, a first low-voltage winding and a second low-voltage winding; the positive end of the high-voltage winding is connected to the switch pin of the power chip, and the negative end of the high-voltage winding is connected to the three-phase line and the live wire of the AC power supply;

[0029] The positive terminal of the first low-voltage winding is connected to the input terminal of the energy storage voltage stabilization unit through a third diode;

[0030] The positive terminal of the second low-voltage winding is connected to the digital power pin of the power chip through a fourth diode and a fourteenth resistor; the positive terminal of the second low-voltage winding is also connected to the feedback pin of the power chip through a fifteenth resistor;

[0031] The energy storage voltage stabilization unit includes a voltage stabilization chip; the input pin of the voltage stabilization chip is connected to the output end of the AC / DC conversion unit, and the output pin of the voltage stabilization chip is connected to the power input end of each functional module of the reclosing control circuit;

[0032] The input pin and the output pin of the voltage stabilizing chip are also connected to the corresponding capacitor group respectively.

[0033] In an optional implementation, a power conversion module is further included, wherein the power conversion module is connected to the control module and is used to supply power to the control module.

[0034] In a second aspect, the utility model provides a circuit breaker, comprising the aforementioned reclosing control circuit, a DC motor and a reclosing actuator;

[0035] The reclosing control circuit is connected to the DC motor, and the DC motor is also connected to the reclosing actuator.

[0036] The embodiments of the present application have the following beneficial effects:

[0037] The embodiment of the present application provides a reclosing control circuit, including a fee control module, a voltage signal conditioning module, a control module and a DC motor drive module; the fee control module is used to connect to the live wire output terminal to generate a fee control signal; the voltage signal conditioning module is used to connect to the corresponding phase line to obtain and generate a sampling signal according to the voltage sampling value of the corresponding phase line; the control module is used to output a trip signal or a closing signal when determining that the fee control signal and / or the sampling signal is in the target level state; the DC motor drive module is used to connect the DC motor, and when receiving the closing signal, drive the DC motor to start, so as to drive the circuit breaker connected to the DC motor to complete the closing action; when receiving the opening signal, drive the DC motor to drive the circuit breaker to complete the opening action. The present application realizes the automated opening and closing processing in the state of arrears and over-undervoltage, avoiding the inconvenience caused by frequent manual closing when a fault or arrears occurs. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solution of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present application and should not be regarded as limiting the scope of protection of the present application. In each of the drawings, similar components are numbered similarly.

[0039] Figure 1 A schematic diagram of the structure of a reclosing control circuit in an embodiment of the utility model is shown;

[0040] Figure 2 A schematic diagram of the structure of the fee control module in the embodiment of the utility model is shown;

[0041] Figure 3 A schematic diagram of the structure of a single-phase sampling branch in a voltage signal conditioning module in an embodiment of the utility model is shown;

[0042] Figure 4 A structural schematic diagram of a control module in an embodiment of the utility model is shown;

[0043] Figure 5 A schematic diagram of the structure of a DC motor drive module in an embodiment of the utility model is shown;

[0044] Figure 6 A schematic diagram of the structure of the position detection module in the embodiment of the utility model is shown;

[0045] Figure 7 A structural schematic diagram of a power supply module in an embodiment of the utility model is shown. DETAILED DESCRIPTION

[0046] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0047] The components of the embodiments of the present application generally described and shown in the drawings herein may be arranged and designed in various configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present application.

[0048] Hereinafter, the terms "including", "having" and their cognates, which may be used in various embodiments of the present application, are intended only to indicate specific features, numbers, steps, operations, elements, components, or combinations of the foregoing items, and should not be understood as first excluding the existence of one or more other features, numbers, steps, operations, elements, components, or combinations of the foregoing items or adding the possibility of one or more features, numbers, steps, operations, elements, components, or combinations of the foregoing items.

[0049] Furthermore, the terms “first”, “second”, “third”, etc. are merely used for distinguishing descriptions and are not to be understood as indicating or implying relative importance.

[0050] Unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meanings as those generally understood by those skilled in the art to which the various embodiments of the present application belong. The terms (such as those defined in generally used dictionaries) will be interpreted as having the same meanings as the contextual meanings in the relevant technical field and will not be interpreted as having idealized meanings or overly formal meanings unless clearly defined in the various embodiments of the present application.

[0051] like Figure 1 As shown, the utility model provides a reclosing control circuit, including a fee control module 100, a voltage signal conditioning module 200, a control module 300 and a DC motor drive module 400.

[0052] For example, Figure 2 As shown, the fee control module 100 includes an adapter J1, a first fee control unit 110, a second fee control unit 120 and a third fee control unit 130. The first fee control unit 110 and the second fee control unit 120 are correspondingly connected to the signal pins of the adapter J1; the third fee control unit 130 is respectively connected to the second fee control unit 120 and the power supply end (i.e., the +5v end shown in the figure); the first fee control unit 110 is used to connect to the live wire output end to generate a fee control signal (i.e., signal F), which is transferred via the adapter J1 to the second fee control unit 120 and then output via the third fee control unit 130.

[0053] For reference, the first fee control unit 110 includes at least one first resistor R1; wherein, if there are multiple first resistors R1, each first resistor R1 is connected in series; the second fee control unit 120 includes at least one second resistor R2, and a first diode D1; wherein, if there are multiple second resistors R2, each second resistor R2 is connected in series; the third fee control unit 130 includes a third resistor R3, a fourth resistor R4, a fifth resistor R5, a first capacitor C1, a second capacitor C2, a switch tube Q1 and a voltage regulator tube ZD1.

[0054] Furthermore, the input end of the first second resistor R2 is connected to the adapter J1, the last second resistor R2 is connected to the anode of the first diode D1, and the cathode of the first diode D1 is respectively connected to the cathode of the voltage regulator tube ZD1 and one end of the third resistor R3.

[0055] The first end of the fourth resistor R4 and the first capacitor C1 is connected to the middle node between the base of the switch tube Q1 and the third resistor R3; the second end of the fourth resistor R4 and the first capacitor C1 is connected to the middle node between the emitter of the switch tube Q1 and the anode of the voltage regulator tube ZD1; the emitter of the switch tube Q1 is also connected to the ground end.

[0056] The first end of the second capacitor C2 is connected to the middle node between the fifth resistor R5 and the collector of the switch tube Q1, and the second end of the second capacitor C2 is connected to the emitter of the switch tube Q1; the fifth resistor R5 is also connected to the power supply end.

[0057] It can be understood that the fee control module 100 is used to convert the fee control signal into a C99 signal via the adapter J1, and then output it in the form of a C-Sample signal via the third fee control unit 130.

[0058] In one example, if Figure 3 As shown, the voltage signal conditioning module 200 includes three-phase sampling branches, and the input end of each phase sampling branch is used to connect the corresponding phase line (i.e., phases A, B, and C) to obtain the voltage sampling value of the corresponding phase line, and generate sampling signals (such as Voltage, Voltage2, and Voltage3) according to the voltage sampling value of each phase line. Optionally, each phase sampling branch adopts the same circuit structure.

[0059] Among them, each phase sampling branch includes a second diode D2, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a third capacitor C3 and a fourth capacitor C4; wherein, the number of the sixth resistor R6 is not limited here. If there are multiple sixth resistors R6, each sixth resistor R6 is connected in series; the anode of the diode is used to connect the input end of the corresponding phase line, the cathode of the second diode D2 is connected to the first sixth resistor R6, and the last sixth resistor R6 is respectively connected to the seventh resistor R7 and the ground end; the first parallel end of the eighth resistor R8 and the third capacitor C3 is connected to the middle node of the last sixth resistor R6 and the seventh resistor R7, and the second parallel end of the eighth resistor R8 and the third capacitor C3 is connected to the ground end; one end of the fourth capacitor C4 is connected to the output end of the seventh resistor R7, and the other end of the fourth capacitor C4 is respectively connected to the second parallel end and the ground end.

[0060] In one example, the control module 300 is respectively connected to the third fee control unit 130 and the output end of each phase sampling branch, and is used to receive a fee control signal and / or a sampling signal, and when it is determined that the fee control signal and / or the sampling signal is in a target level state, output a switch-off signal or a switch-on signal.

[0061] Alternatively, if Figure 4 As shown, the control module 300 includes a control chip U2; wherein the control chip U2 is connected to the third fee control unit 130, each phase sampling branch and the input end or output end of other functional modules through corresponding signal pins.

[0062] In one embodiment, the DC motor driving module 400 is connected to the DC motor; for example, the DC motor driving module 400 includes a driving chip U1, the input end of the driving chip U1 is connected to the control chip U2 in the control module 300, and the output end of the driving chip U1 is used to connect the DC motor; the driving chip U1 is used to drive the DC motor to start when receiving a closing signal, so as to drive the circuit breaker connected to the DC motor to complete the closing action; when receiving an opening signal, the DC motor is driven to drive the circuit breaker to complete the opening action. Optionally, this embodiment can drive the circuit breaker to complete the opening and closing actions by driving and controlling the forward and reverse rotation of the DC motor, and the specific driving method is not limited here.

[0063] For reference, Figure 5 As shown, the DC motor drive module 400 also includes a peripheral circuit connected to the driver chip U1; wherein the peripheral circuit includes a ninth resistor R9, a tenth resistor R10, a filter capacitor group and a fifth capacitor C5; one end of the ninth resistor R9 is connected to the first input pin (i.e., INA) of the driver chip U1, one end of the tenth resistor R10 is connected to the second input pin (i.e., INB) of the driver chip U1, and the other ends of the ninth resistor R9 and the tenth resistor R10 are both connected to the ground terminal; the filter capacitor group includes a plurality of capacitors in parallel, one end of the filter capacitor group is respectively connected to the power supply terminal and the power supply pin of the driver chip U1, and the other end of the filter capacitor group is respectively connected to the ground pin and the ground terminal of the driver chip U1; the two ends of the fifth capacitor C5 are correspondingly connected to the first output pin and the second output pin of the driver chip U1. Optionally, the filter capacitor group can adopt a combination of an electrolytic capacitor C12 and an ordinary capacitor C13, and the specific setting method is not limited here.

[0064] In some examples, such as Figure 6As shown, the reclosing control circuit also includes a position detection module; the position detection module includes a first switch control unit, a second switch control unit and a third switch control unit; the input ends of the first switch control unit, the second switch control unit and the third switch control unit are connected to the power supply end in parallel, and the output ends of the first switch control unit, the second switch control unit and the third switch control unit are respectively connected to the corresponding signal pins of the control module 300; the first switch control unit includes a first mechanical switch S1, which is used to input a first state signal to the control module 300 according to the open and closed state of the first mechanical switch S1, and the control module is used to perform the detection of the closing position of the circuit breaker according to the first state signal; the second switch control unit includes a second mechanical switch S2, which is used to input a second state signal to the control module 300 according to the open and closed state of the second mechanical switch S2, and the control module is used to perform the detection of the closing position of the circuit breaker according to the second state signal; the third switch control unit includes a micro switch S3, which is used to input a third state signal to the control module 300 according to the open and closed state of the micro switch S3; the control module is used to perform the action of detecting whether the circuit breaker has completed the closing according to the third state signal, that is, to detect whether the circuit breaker has completed the closing.

[0065] The first switch control unit also includes a sixth capacitor C6, a seventh capacitor C7 and an eleventh resistor R11; the first end of the sixth capacitor C6 is connected to the first contact of the first mechanical switch S1, and is connected to the power supply end through the eleventh resistor R11; the second end of the sixth capacitor C6 is respectively connected to the third contact, the fourth contact and the first end of the seventh capacitor C7 of the first mechanical switch S1; the second end of the seventh capacitor C7 is respectively connected to the second contact of the first mechanical switch S1 and the first signal output end (outputting the MCB_Reset signal); the first end of the seventh capacitor C7 is also connected to the ground end.

[0066] The second switch control unit also includes an eighth capacitor C8, a ninth capacitor C9 and a twelfth resistor R12; the first end of the eighth capacitor C8 is connected to the second contact of the second mechanical switch S2, and is connected to the power supply end through the twelfth resistor R12; the second end of the eighth capacitor C8 is connected to the third contact, the fourth contact and the first end of the ninth capacitor C9 of the second mechanical switch S2; the second end of the ninth capacitor C9 is respectively connected to the second contact of the second mechanical switch S2 and the second signal output end (outputting the MCB_Open signal), and the first end of the seventh capacitor C7 is also connected to the ground end.

[0067] The third switch control unit also includes a tenth capacitor C10, an eleventh capacitor C11 and a thirteenth resistor R13; the first end of the tenth capacitor C10 is connected to the second contact of the microswitch S3, and is connected to the power supply end through the thirteenth resistor R13; the second end of the eighth capacitor C8 is connected to the third contact of the microswitch S3 and the first end of the eleventh capacitor C11; the second end of the eleventh capacitor C11 is respectively connected to the first contact of the microswitch S3 and the third signal output end (outputting KEY1 signal), and the first end of the eleventh capacitor C11 is also connected to the ground end.

[0068] In one example, if Figure 7 As shown, the reclosing control circuit also includes a power supply module 500; the power supply module 500 includes an AC / DC conversion unit 410 and an energy storage voltage stabilizing unit 420; the input end of the AC / DC conversion unit 410 is respectively connected to the three-phase line (L) and the live line (N) of the AC power supply, and the output end of the AC / DC conversion unit is connected to the energy storage voltage stabilizing unit 420; the output end of the energy storage voltage stabilizing unit 420 is respectively connected to the power input end of each functional module in the reclosing control circuit; the power supply module 500 is used to input the power supply voltage to each functional module in the reclosing control circuit to supply power to the reclosing control circuit.

[0069] In some examples, the AC / DC conversion unit 410 includes a transformer subunit and a power chip U3; the transformer subunit includes a transformer T1, a high-voltage winding 411, a first low-voltage winding 412, and a second low-voltage winding 413; wherein the positive end of the high-voltage winding 411 is connected to the switch pin (i.e., SW) of the power chip U3, and the negative end of the high-voltage winding 411 is connected to the three-phase line and the live wire of the AC power supply; the positive end of the first low-voltage winding 412 is connected to the input end of the energy storage voltage stabilization unit 420 through the third diode D3; the positive end of the second low-voltage winding 413 is connected to the input end of the energy storage voltage stabilization unit 420 through the fourth diode D3. The tube D4 and the fourteenth resistor R14 are connected to the digital power pin (i.e., VDD) of the power chip U3; the positive terminal of the second low-voltage winding 413 is also connected to the feedback pin (i.e., FB) of the power chip U3 through the fifteenth resistor R15; the energy storage voltage stabilizing unit 420 includes a voltage stabilizing chip U4 and its peripheral circuits; the input pin of the voltage stabilizing chip U4 is connected to the output end of the AC / DC conversion unit, and the output pin of the voltage stabilizing chip U4 is connected to the power input end of each functional module of the reclosing control circuit; the input pin and output pin of the voltage stabilizing chip U4 are also respectively connected to the corresponding capacitor group.

[0070] In one embodiment, the reclosing control circuit further includes a power conversion module, which is connected to the control module 300 and is used to supply power to the control module 300. The specific structural setting of the power conversion module can be set accordingly according to actual needs and is not limited here.

[0071] In this embodiment, the fee control module is used to monitor the user's arrears in daily life. At the same time, the voltage signal conditioning module is used to monitor the over-voltage and under-voltage conditions caused by circuit faults, thereby realizing automatic opening and closing processing in the arrears and over-voltage and under-voltage states, avoiding the inconvenience caused by frequent manual closing when faults or arrears occur, and improving the flexibility of reclosing control.

[0072] An embodiment of the present application also provides a circuit breaker, including a reclosing control circuit, a DC motor and a reclosing actuator; the reclosing control circuit is connected to the DC motor, and the DC motor is also connected to the reclosing actuator.

[0073] It can be understood that any optional options of the above-mentioned reclosing control circuit are applicable to this embodiment, so they will not be described in detail here.

[0074] The above description is only a specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application.

Claims

1. A reclosing control circuit, characterized in that: include: The fee control module includes an adapter, a first fee control unit, a second fee control unit and a third fee control unit; the third fee control unit is connected to the second fee control unit and the power supply end respectively; the first fee control unit is used to connect to the live wire output end to generate a fee control signal, and the fee control signal is transferred to the second fee control unit via the adapter and then output via the third fee control unit; The voltage signal conditioning module comprises three-phase sampling branches, wherein the input end of each phase sampling branch is used to be connected to a corresponding phase line to obtain and generate a sampling signal according to a voltage sampling value of the corresponding phase line; A control module, connected to the output ends of the third fee control unit and each phase sampling branch, respectively, for receiving the fee control signal and / or the sampling signal, and outputting an opening signal or a closing signal when determining that the fee control signal and / or the sampling signal is in a target level state; The DC motor driving module is connected to the DC motor and is used to drive the DC motor to start when receiving the closing signal, so as to push the circuit breaker connected to the DC motor to complete the closing action; when receiving the opening signal, it pushes the DC motor to drive the circuit breaker to complete the opening action.

2. The reclosing control circuit according to claim 1, characterized in that: The first fee control unit includes at least one first resistor; the second fee control unit includes at least one second resistor and a first diode; the third fee control unit includes a third resistor, a fourth resistor, a fifth resistor, a first capacitor, a second capacitor, a switch tube and a voltage regulator tube; The input end of the first second resistor is connected to the adapter, the last second resistor is connected to the anode of the first diode, and the cathode of the first diode is connected to the cathode of the voltage regulator tube and one end of the third resistor respectively; The first ends of the fourth resistor and the first capacitor are connected to the middle node between the base of the switch tube and the third resistor; the second ends of the fourth resistor and the first capacitor are connected to the middle node between the emitter of the switch tube and the anode of the voltage regulator tube; the emitter of the switch tube is also connected to the ground terminal; The first end of the second capacitor is connected to the middle node between the fifth resistor and the collector of the switch tube, and the second end of the second capacitor is connected to the emitter of the switch tube; the fifth resistor is also connected to the power supply end.

3. The reclosing control circuit according to claim 1, characterized in that: The sampling branch of each phase includes a second diode, a sixth resistor, a seventh resistor, an eighth resistor, a third capacitor and a fourth capacitor; The anode of the diode is used to connect to the input end of the corresponding phase line, the cathode of the second diode is connected to the first sixth resistor, and the last sixth resistor is connected to the seventh resistor and the ground terminal respectively; A first parallel end of the eighth resistor and the third capacitor is connected to an intermediate node between the last sixth resistor and the seventh resistor, and a second parallel end of the eighth resistor and the third capacitor is connected to the ground terminal; One end of the fourth capacitor is connected to the output end of the seventh resistor, and the other end of the fourth capacitor is connected to the second parallel end and the ground end respectively.

4. The reclosing control circuit according to claim 1, characterized in that: It also includes a position detection module; the position detection module includes a first switch control unit, a second switch control unit and a third switch control unit; The input ends of the first switch control unit, the second switch control unit and the third switch control unit are connected to the power supply end in parallel, and the output ends of the first switch control unit, the second switch control unit and the third switch control unit are connected to the corresponding signal pins of the control module respectively; The first switch control unit includes a first mechanical switch, which is used to input a first state signal to the control module according to the open and closed state of the first mechanical switch; the control module is used to perform the detection of the closing position of the circuit breaker according to the first state signal; The second switch control unit includes a second mechanical switch, which is used to input a second state signal to the control module according to the open and closed state of the second mechanical switch; the control module is used to perform the detection of the closing position of the circuit breaker according to the second state signal; The third switch control unit includes a micro switch, which is used to input a third state signal to the control module according to the open and closed state of the micro switch; the control module is used to execute the detection of whether the circuit breaker has completed closing according to the third state signal.

5. The reclosing control circuit according to claim 4, characterized in that: The first switch control unit also includes a sixth capacitor, a seventh capacitor and an eleventh resistor; the first end of the sixth capacitor is connected to the first contact of the first mechanical switch, and is connected to the power supply end through the eleventh resistor; the second end of the sixth capacitor is respectively connected to the third contact, the fourth contact of the first mechanical switch and the first end of the seventh capacitor; the second end of the seventh capacitor is respectively connected to the second contact of the first mechanical switch and the first signal output end; the first end of the seventh capacitor is also connected to the ground end.

6. The reclosing control circuit according to claim 1, characterized in that: The DC motor driving module includes a driving chip and a peripheral circuit connected to the driving chip; wherein the input end of the driving chip is connected to the control module, and the output end of the driving chip is used to connect to the DC motor.

7. The reclosing control circuit according to claim 1, characterized in that: It also includes a power module; the power module includes an AC / DC conversion unit and an energy storage voltage stabilization unit; The input end of the AC / DC conversion unit is respectively connected to the three-phase line and the live line of the AC power supply, and the output end of the AC / DC conversion unit is connected to the energy storage and voltage stabilization unit; The output end of the energy storage voltage stabilizing unit is respectively connected to the power input end of each functional module in the reclosing control circuit; The power supply module is used to input power supply voltage to each functional module in the reclosing control circuit to supply power to the reclosing control circuit.

8. The reclosing control circuit according to claim 7, characterized in that: The AC / DC conversion unit includes a transformer subunit and a power chip; The transformer subunit includes a high-voltage winding, a first low-voltage winding and a second low-voltage winding; the positive end of the high-voltage winding is connected to the switch pin of the power chip, and the negative end of the high-voltage winding is connected to the three-phase line and the live wire of the AC power supply; The positive terminal of the first low-voltage winding is connected to the input terminal of the energy storage voltage stabilization unit through a third diode; The positive terminal of the second low-voltage winding is connected to the digital power pin of the power chip through a fourth diode and a fourteenth resistor; the positive terminal of the second low-voltage winding is also connected to the feedback pin of the power chip through a fifteenth resistor; The energy storage voltage stabilization unit includes a voltage stabilization chip; the input pin of the voltage stabilization chip is connected to the output end of the AC / DC conversion unit, and the output pin of the voltage stabilization chip is connected to the power input end of each functional module of the reclosing control circuit; The input pin and the output pin of the voltage stabilizing chip are also connected to the corresponding capacitor group respectively.

9. The reclosing control circuit according to claim 1, characterized in that: It also includes a power conversion module, which is connected to the control module and is used to supply power to the control module.

10. A circuit breaker, characterized in that: It comprises a reclosing control circuit, a DC motor and a reclosing actuator according to any one of claims 1 to 9; The reclosing control circuit is connected to the DC motor, and the DC motor is also connected to the reclosing actuator.

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