A residual current circuit breaker control system

Abstract

The present invention relates to a residual current circuit breaker control system, comprising a controller, a trip coil drive unit and a residual current detection unit, wherein the residual current detection unit is used to obtain the residual current; the controller is used to: S1, when the residual current circuit breaker is powered on, sequentially configure the system clock of the controller and the target leakage current of the residual current circuit breaker, and generate a first power-on mark; S2, while performing the remaining function configuration of the controller, monitor the residual current detection unit to obtain the residual current; S3, confirm whether the residual current is greater than the target leakage current, if so, execute step S4, otherwise continue to execute S2 until all function configurations are completed and the first power-on mark is cleared; S4, control the trip coil drive unit to generate a driving level to drive the trip coil of the residual current circuit breaker to perform a tripping action, clear the first power-on mark, and end. The implementation of the present invention can flexibly set the leakage current threshold value and increase the use scenarios of the residual current circuit breaker.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit breakers, and more particularly to a residual current circuit breaker control system. Background Art

[0002] In the power distribution network, the leakage protector is a protective measure to prevent electric shock, electrical fire and damage to electrical equipment. The leakage protector is also a residual current operated circuit breaker. There are two main types of existing residual current operated circuit breakers, one is the electromagnetic residual current operated circuit breaker, and the other is the electronic residual current circuit breaker. After the electromagnetic residual current operated circuit breaker, the residual current transformer and the electromagnetic release are designed, the size of the leakage current is fixed. Products with different leakage current sizes need to add a variety of matching residual current transformers or release designs, which increases management and operating costs. Electronic residual current circuit breakers can set different leakage current sizes through the leakage current gear knob of the electronic control panel, or by replacing different electronic control panels. There are only a few gears to choose from for leakage current. The gear setting must be installed and set on site and cannot be changed remotely. At the same time, residual current circuit breakers with special leakage current sizes need to be specially customized. It is impossible to achieve a product that can be set arbitrarily within a certain leakage current range. In the Internet era, residual current circuit breakers that can be set arbitrarily within a certain leakage current range have become an urgent need. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a residual current circuit breaker control system in view of the above-mentioned partial technical defects of the prior art.

[0004] The technical solution adopted by the present invention to solve the technical problem is: construct a residual current circuit breaker control system, the control system includes a controller, a trip coil driving unit and a residual current detection unit connected to the controller, wherein the controller is connected to the power supply input of the residual current circuit breaker, the trip coil driving unit is used to drive the trip coil of the residual current circuit breaker to work, and the residual current detection unit is used to detect the residual current generated by the residual current transformer in the residual current circuit breaker;

[0005] The controller is used to perform the following steps:

[0006] S1. When the residual current circuit breaker is powered on, sequentially configure the system clock of the controller and the target leakage current of the residual current circuit breaker, and generate a first power-on mark;

[0007] S2, monitoring the residual current detection unit to obtain the residual current while performing the residual function configuration of the controller;

[0008] S3, confirm whether the residual current is greater than the target leakage current, if so, execute step S4, otherwise continue to execute step S2 until all function configurations of the controller are completed and the first power-on flag is cleared;

[0009] S4, controlling the trip coil driving unit to generate a driving level to drive the trip coil of the residual current circuit breaker to perform a tripping action, clearing the first power-on flag, and ending.

[0010] Preferably, in the residual current circuit breaker control system of the present invention, the controller is further used to perform the following steps:

[0011] S5. After completing all functional configurations of the controller, monitoring the residual current detection unit to obtain the residual current, and comparing the residual current with the target leakage current;

[0012] S6: When the residual current is greater than the target leakage current, controlling the trip coil driving unit to generate a driving level to drive the trip coil of the residual current circuit breaker to perform a tripping action.

[0013] Preferably, in the residual current circuit breaker control system of the present invention, the control system further comprises a communication unit;

[0014] The communication unit is connected to the controller and is used to connect to a communication network to achieve communication between the controller and the communication network.

[0015] Preferably, in the residual current circuit breaker control system described in the present invention, the controller obtains the target leakage current of the residual current circuit breaker through the communication unit.

[0016] Preferably, in the residual current circuit breaker control system described in the present invention, the communication unit includes a 485 communication unit or a CAN communication unit.

[0017] Preferably, in the residual current circuit breaker control system of the present invention, the control system further comprises a switching power supply unit;

[0018] The input end of the switching power supply unit is connected to the bus input of the residual current circuit breaker, and the output end of the switching power supply unit is respectively connected to the controller, the trip coil drive unit and the residual current detection unit, for supplying power to the controller, the trip coil drive unit and the residual current detection unit.

[0019] Preferably, in the residual current circuit breaker control system of the present invention, the residual current detection unit includes a first connector, a first sampling resistor and a differential amplifier circuit;

[0020] The first connector is used to connect the residual current transformer, the first end of the first sampling resistor is connected to the first end of the first connector and the first input end of the differential amplifier circuit, and the second end of the first sampling resistor is connected to the second end of the first connector and the second input end of the differential amplifier circuit;

[0021] The output end of the differential amplifier circuit is connected to the signal input end of the controller.

[0022] Preferably, in the residual current circuit breaker control system of the present invention, the differential amplifier circuit comprises an operational amplifier chip, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a first capacitor, a second capacitor, a third capacitor and a fourth capacitor;

[0023] A first end of the first capacitor is connected to a first end of the first connector and a first end of the first resistor, and a second end of the first capacitor is connected to a second end of the first connector and a first end of the second capacitor;

[0024] The second end of the first resistor is connected to the first end of the second capacitor, the first end of the third capacitor, the first end of the third resistor and the non-inverting input terminal of the operational amplifier chip, and the second end of the second resistor is connected to the second end of the third capacitor, the first end of the fourth resistor, the first end of the fourth capacitor and the inverting input terminal of the operational amplifier chip;

[0025] The second end of the second capacitor and the second end of the third resistor are connected to the switching power supply unit, the output end of the operational amplifier chip is connected to the first end of the fourth resistor, the first end of the fourth capacitor and the first end of the fifth resistor, and the second end of the fifth resistor is connected to the signal input end of the controller.

[0026] Preferably, in the residual current circuit breaker control system of the present invention, the trip coil driving unit includes a first driving circuit, an optocoupler isolation circuit, a second driving circuit and an isolation diode;

[0027] The controller of the first driving circuit is connected to the controller, the first end of the first driving circuit is connected to the second end of the optocoupler isolation circuit, the first end of the optocoupler isolation circuit and the fourth end of the optocoupler isolation circuit are respectively connected to the switching power supply unit, and the fourth end of the optocoupler isolation circuit is connected to the control end of the second driving circuit;

[0028] The first end of the second driving circuit is connected to the first end of the trip coil and the anode of the isolation diode, and the second end of the trip coil and the cathode of the isolation diode are connected to the bus input of the residual current circuit breaker;

[0029] The second end of the first driving circuit and the second end of the second driving circuit are grounded respectively.

[0030] Preferably, in the residual current circuit breaker control system of the present invention,

[0031] The first driving circuit includes a first MOS tube, a fifth capacitor, a sixth resistor and a seventh resistor; the control end of the first MOS tube is connected to the first end of the sixth resistor and the first end of the seventh resistor, the second end of the sixth resistor is connected to the control signal output end of the controller via the fifth capacitor, the first end of the first MOS tube is connected to the second end of the optocoupler isolation circuit, and the second end of the first MOS tube and the second end of the seventh resistor are grounded; and / or

[0032] The second driving circuit includes a second MOS tube, an eighth resistor and a ninth resistor; the control end of the second MOS tube is connected to the first end of the eighth resistor and the first end of the ninth resistor, the second end of the eighth resistor is connected to the third end of the optocoupler isolation circuit, and the second end of the second MOS tube and the second end of the ninth resistor are grounded.

[0033] A residual current circuit breaker control system implementing the present invention has the following beneficial effects: it can realize flexible setting of the leakage current threshold value of the residual current circuit breaker, so that the same residual current circuit breaker can be applied to more usage scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0035] Figure 1 It is a structural schematic diagram of an embodiment of a residual current circuit breaker control system of the present invention;

[0036] Figure 2 It is a program flow chart of an embodiment of the working process of a controller in a residual current circuit breaker control system of the present invention;

[0037] Figure 3 It is a program flow chart of another embodiment of the working process of a controller in a residual current circuit breaker control system of the present invention;

[0038] Figure 4 It is a structural schematic diagram of another embodiment of a residual current circuit breaker control system of the present invention;

[0039] Figure 5 It is a partial circuit diagram of an embodiment of a residual current circuit breaker control system of the present invention;

[0040] Figure 6 It is a structural schematic diagram of another embodiment of a residual current circuit breaker control system of the present invention;

[0041] Figure 7 yes Figure 6 A partial circuit diagram of an embodiment of a switching power supply unit;

[0042] Figure 8 yes Figure 1 A partial circuit diagram of an embodiment of a residual circuit detection unit;

[0043] Fig. 9 yes Figure 1 A partial circuit diagram of an embodiment of a middle trip coil drive unit. DETAILED DESCRIPTION

[0044] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, specific embodiments of the present invention are now described in detail with reference to the accompanying drawings.

[0045] like Figure 1 FIG. 1 shows an embodiment of a residual current circuit breaker control system of the present invention. Figure 1 In one embodiment of a residual current circuit breaker control system of the present invention, the control system includes a controller 110, a trip coil driving unit 120 and a residual current detection unit 130 connected to the controller 110, wherein the controller 110 is connected to the power supply input of the residual current circuit breaker, the trip coil driving unit 120 is used to drive the trip coil of the residual current circuit breaker to work, and the residual current detection unit 130 is used to detect the residual current generated by the residual current transformer in the residual current circuit breaker. Figure 2 As shown, the controller 110 is used to perform the following steps: S1, when the residual current circuit breaker is powered on, sequentially configure the system clock of the controller 110 and the target leakage current of the residual current circuit breaker, and generate a first power-on mark; S2, while performing the remaining function configuration of the controller 110, monitor the residual current detection unit 130 to obtain the residual current; S3, confirm whether the residual current is greater than the target leakage current, if so, execute step S4, otherwise continue to execute step S2 until all function configurations of the controller 110 are completed and the first power-on mark is cleared; S4, control the trip coil drive unit 120 to generate a drive level to drive the trip coil of the residual current circuit breaker to perform a tripping action, clear the first power-on mark, and end.

[0046] Specifically, the controller 110 is connected to the power supply input of the residual circuit breaker. When the residual circuit breaker is powered on, the controller 110 will be powered on synchronously and start working. When the controller 110 is working, the residual current generated by the residual current transformer in the residual current circuit breaker is detected by the residual current detection unit 130. At the same time, the corresponding target residual current is set by the controller 110. When the residual current is greater than the target residual current, the controller 110 triggers the trip coil drive unit 120 to output a drive signal to drive the trip coil of the residual circuit breaker to work and realize the circuit breaker circuit breaker. In the specific process of the system, when the residual current circuit breaker is powered on, in order to ensure that the residual current circuit breaker can perform circuit breaker protection when a large current appears at the moment of power-on, when the residual current circuit breaker is powered on, the controller 110 also starts to power on. In the initial stage of powering on the controller 110, only the system clock configuration and target leakage current configuration of the controller 110 are performed, and the first power-on mark is generated at the same time to mark the current residual current circuit breaker as the first power-on. The controller 110 determines that the circuit breaker has leakage according to the first power-on mark at the power-on stage, that is, the circuit breaker power-on leakage detection result can be obtained. After the initial configuration, the controller 110 will continue to configure the remaining functions. While the controller 110 is configuring the remaining functions, the residual current corresponding to the residual current circuit breaker will be monitored by the residual current monitoring unit. When it can be determined that the current residual current exceeds the target leakage current set by the controller 110, it means that an overcurrent has occurred in the power-on stage of the residual current circuit breaker. At this time, the residual current circuit breaker can be directly powered off, and the first power-on mark in the controller 110 is cleared at the same time. And through this process, it is determined whether the residual circuit breaker is short-circuited in the power-on stage. If the current residual current has not exceeded the target leakage current set by the controller 110, the controller 110 can complete the entire function configuration normally until the entire system enters a normal working state. Through this process, the power-on protection of the residual current circuit breaker can be realized. At this time, the target leakage current can be changed by the controller 110, and the residual current circuit breaker can be applied to different application scenarios without hardware update, and the configuration is more flexible.

[0047] like Figure 3As shown, in one embodiment, the controller 110 is also used to perform the following steps: S5, after completing all functional configurations of the controller 110, monitor the residual current detection unit 130 to obtain the residual current, and compare the residual current with the target leakage current; S6, when the residual current is greater than the target leakage current, control the trip coil drive unit to generate a drive level to drive the trip coil of the residual current circuit breaker to perform a tripping action. After the controller 110 completes all functional configurations, the residual current detection unit 130 can be monitored in real time by the controller 110 to monitor the residual current corresponding to the residual current circuit breaker and confirm whether there is an overcurrent when the residual current circuit breaker is working normally. When the residual current is greater than the target leakage current set by the controller 110, the controller 110 can control the trip coil drive unit to generate a drive level to drive the trip coil of the residual current circuit breaker to perform a tripping action, and the residual current circuit breaker is powered off. Through this process, the corresponding leakage monitoring result when the entire system is in working state can be obtained. The controller 110 determines that the circuit breaker has leakage in the normal working stage according to the absence of the first power-on mark, that is, the circuit breaker power supply leakage detection result can be obtained. In one embodiment, after the configuration of the controller 110 is completed, the target leakage current can be updated so that the residual current circuit breaker can be triggered to disconnect by different target leakage currents after entering normal power supply after power-on. Simply put, the controller completes all the functional configurations of the controller, which is equivalent to entering the main program conventional leakage protection function program, and can perform a series of setting actions of the controller, such as setting the target leakage current value through the controller, and performing detection, calculation and driving tripping of the circuit breaker working process.

[0048] like Figure 4 As shown, in one embodiment, the control system also includes a communication unit 140; the communication unit 140 is connected to the controller 110 and is used to connect to the communication network to realize communication between the controller 110 and the communication network. Specifically, the controller 110 is connected to the communication network through the controller 110 to communicate data with an external device through the communication network, such as receiving instructions generated by an external device or sending corresponding data to an external device. For example, an instruction to set a target leakage current can be generated by an external device to update the target leakage current of the controller 110, or to configure the target leakage current of the controller 110. That is, in a specific embodiment, the controller 110 obtains the target leakage current of the residual current circuit breaker through the communication unit 140. In another embodiment, the controller 110 can also send the corresponding test results to the external device.

[0049] In one embodiment, the communication unit 140 includes a 485 communication unit 140. That is, the controller 110 can perform data communication with an external device through the 485 communication unit 140. Figure 5As shown, the 485 communication unit 140 can adopt an isolated communication mode, and the optical coupler UP301 is the transceiver enable signal of the 485 communication chip. The 485_TXD and 485_RXD of the controller 110 are converted by the isolation chip U101, and then converted into bus signals by the 485 communication chip. The A / B bus is connected to an external gateway device, and the mobile phone APP or the central control system can be a gateway device, and then communicate with the controller 110 through the 485 communication unit 140. In one embodiment, the communication unit 140 may also include a CAN communication unit 140, and the external gateway device has a CAN communication port, which matches and communicates with the controller 110.

[0050] like Figure 6 As shown, the control system further includes a switching power supply unit 150; the input end of the switching power supply unit 150 is connected to the bus input of the residual current circuit breaker, and the output end of the switching power supply unit 150 is respectively connected to the controller 110, the trip coil drive unit 120 and the residual current detection unit 130, for supplying power to the controller 110, the trip coil drive unit 120 and the residual current detection unit 130. Specifically, in the control system, the controller 110, the trip coil drive unit 120 and the residual current detection unit 130 are supplied with power by the switching power supply unit 150. The input end of the switching power supply unit 150 is connected to the bus input of the residual current circuit breaker, so that the switching power supply unit 150 and the bus input of the residual current circuit breaker are powered on at the same time, that is, the controller 110 can also be powered on and work at the same time as the residual current circuit breaker, so as to realize the power-on leakage detection of the residual current circuit breaker.

[0051] like Figure 7 As shown, in a specific embodiment, the switching power supply unit 150 uses a fast start-up power supply chip, and the startup time is less than 20ms. Among them, the switching power supply unit 150 isomorphic transformer T101 and its peripheral circuits form 3 outputs, and the 3 outputs are output through the main circuit 12V output winding module, the 5V auxiliary winding module and the 12V auxiliary winding module respectively. The main circuit 12V supplies power to the 12V functional module of the controller 110, and is converted to 3.3V through the LDO chip U104 and its peripheral circuits to power the controller 110. At the same time, the 3.3V is divided by resistors R112 and R113, and then the emitter follower is formed through the operational amplifier chip U105 and its peripheral circuits to provide a reference voltage to the residual current detection unit 130; the 5V secondary winding module supplies power to the communication unit 140 such as the 485 communication module; the auxiliary winding 12V winding module supplies power to the de-energized coil drive unit. The 3 winding modules are isolated from each other.

[0052] like Figure 8As shown, the residual current detection unit 130 includes a first connector, a first sampling resistor and a differential amplifier circuit; the first connector is used to connect the residual current transformer, the first end of the first sampling resistor is connected to the first end of the first connector and the first input end of the differential amplifier circuit, and the second end of the first sampling resistor is connected to the second end of the first connector and the second input end of the differential amplifier circuit; the output end of the differential amplifier circuit is connected to the signal input end of the controller 110. Specifically, the current signal output by the residual current transformer is input into the residual current detection unit 130 through the first connector, i.e., the J201 terminal, and is converted into a voltage signal by the sampling circuit formed by the parallel connection of the RS201 and RS202 terminals, i.e., the first sampling resistor, and then amplified by the differential operational amplifier, superimposed on the DC level of the reference voltage 1.65V, to form a signal ADI, and the ADI signal is connected to the pin of the controller 110, and the controller 110 obtains the corresponding sampling result.

[0053] In one embodiment, the differential amplifier circuit includes an operational amplifier chip, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a first capacitor, a second capacitor, a third capacitor and a fourth capacitor; the first end of the first capacitor is connected to the first end of the first connector and the first end of the first resistor, and the second end of the first capacitor is connected to the second end of the first connector and the first end of the second capacitor; the second end of the first resistor is connected to the first end of the second capacitor, the first end of the third capacitor, the first end of the third resistor and the positive input end of the operational amplifier chip, the second end of the second resistor is connected to the second end of the third capacitor, the first end of the fourth resistor, the first end of the fourth capacitor and the inverting input end of the operational amplifier chip; the second end of the second capacitor and the second end of the third resistor are connected to the switching power supply unit 150, the output end of the operational amplifier chip is connected to the first end of the fourth resistor, the first end of the fourth capacitor and the first end of the fifth resistor, and the second end of the fifth resistor is connected to the signal input end of the controller 110.

[0054] like Figure 8 As shown, the operational amplifier chip includes an operational amplifier chip U101B, the first resistor includes a resistor R201, the second resistor includes a resistor R202, the third resistor includes a resistor R203, the fourth resistor includes a resistor R204, the fifth resistor includes a resistor R205, the first capacitor includes a capacitor C201, the second capacitor includes a capacitor C202, the third capacitor includes a capacitor C203, and the fourth capacitor includes a capacitor C24. The operational amplifier chip U101B forms a differential amplifier circuit by using resistors and capacitors to amplify the obtained residual current signal to meet the detection requirements of the controller 110.

[0055] In one embodiment, if Fig. 9As shown, the trip coil drive unit 120 includes a first drive circuit, an optocoupler isolation circuit, a second drive circuit and an isolation diode; the controller 110 of the first drive circuit is connected to the controller 110, the first end of the first drive circuit is connected to the second end of the optocoupler isolation circuit, the first end of the optocoupler isolation circuit and the fourth end of the optocoupler isolation circuit are respectively connected to the switch power supply unit 150, and the fourth end of the optocoupler isolation circuit is connected to the control end of the second drive circuit; the first end of the second drive circuit is connected to the first end of the trip coil and the anode of the isolation diode, and the second end of the trip coil and the cathode of the isolation diode are connected to the bus input of the residual current circuit breaker; the second end of the first drive circuit and the second end of the second drive circuit are respectively grounded. Specifically, the trip coil drive unit 120 adopts an isolated drive mode, and the signal output by the controller 110 passes through the first drive unit and the isolation effect of the optocoupler isolation circuit, and is input to the second drive unit, and the second drive unit drives the trip coil to work and trip the circuit breaker. The isolation diode includes a diode D310, which is used to protect the trip coil CT301. The driving signal is PWM driving, and the driving time does not exceed 20mS. The main purpose is to ensure that the trip coil can drive the armature to make the trip device disconnect the circuit breaker, and to ensure that the trip coil is not turned on for a long time. Long-term high current conduction will cause the trip coil and MOS tube to heat up too high and burn out.

[0056] In one embodiment, the first driving circuit includes a first MOS tube, a fifth capacitor, a sixth resistor and a seventh resistor; the control end of the first MOS tube is connected to the first end of the sixth resistor and the first end of the seventh resistor, the second end of the sixth resistor is connected to the control signal output end of the controller 110 via the fifth capacitor, the first end of the first MOS tube is connected to the second end of the optocoupler isolation circuit, and the second end of the first MOS tube and the second end of the seventh resistor are grounded. Specifically, the first MOS tube includes a MOS tube Q310, the fifth capacitor includes a capacitor C301, the sixth resistor includes a resistor R301, and the seventh resistor includes a resistor R302. The MOS tube Q301 can also be a triode. The first driving circuit is composed of the MOS tube 301 and its peripheral circuits to drive the optocoupler isolation circuit to operate according to the output level of the controller 110. The optocoupler isolation circuit includes an optocoupler isolation chip UP301 and its peripheral circuits.

[0057] In one embodiment, the second driving circuit includes a second MOS tube, an eighth resistor and a ninth resistor; the control end of the second MOS tube is connected to the first end of the eighth resistor and the first end of the ninth resistor, the second end of the eighth resistor is connected to the third end of the optocoupler isolation circuit, and the second end of the second MOS tube and the second end of the ninth resistor are grounded. Specifically, the second MOS tube includes a MOS tube Q302, the eighth resistor includes a resistor R304, and the ninth resistor includes a resistor R35. The driving circuit formed by the MOS tube Q302 is used to power on the tripping coil so that the tripper can be actuated.

[0058] In the above process, after the controller 110 is powered on, the system clock is configured first, the peripherals are initialized (interrupt vector table is configured), and the system is initialized (the first power-on flag is configured). After completing this step, the power-on leakage detection calculation process is synchronized with the startup of the operating system. When the residual current at the output end is greater than the set residual current action threshold value at the moment of power-on, the controller 110 detects the data of the half-cycle of the ADI interface, and then calculates. After comparison, the CT_DV interface outputs a PWM drive signal for a time T (20ms) to make the electromagnetic release disconnect the circuit breaker, and clear the interrupt flag after disconnection. While the controller 110 processes the residual current signal, the operating system starts to start and executes functional tasks, which also include residual current processing tasks (this residual current is the residual current that appears after the operating system is started).

[0059] Through the above process, on the basis of meeting the national standard requirements, it is possible to arbitrarily set the residual current action threshold, that is, the residual current is continuously adjustable, so that the entire product can be used for multiple purposes.

[0060] It can be understood that the above embodiments only express the preferred implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the patent scope of the present invention. It should be pointed out that, for ordinary technicians in this field, the above technical features can be freely combined without departing from the concept of the present invention, and several deformations and improvements can be made, which all belong to the protection scope of the present invention. Therefore, all equivalent changes and modifications made to the scope of the claims of the present invention should belong to the coverage of the claims of the present invention.

Claims

1. A residual current circuit breaker control system, characterized in that: The control system includes a controller, a trip coil driving unit and a residual current detection unit connected to the controller, wherein the controller is connected to the power supply input of the residual current circuit breaker, the trip coil driving unit is used to drive the trip coil of the residual current circuit breaker to work, and the residual current detection unit is used to detect the residual current generated by the residual current transformer in the residual current circuit breaker; The controller is used to perform the following steps: S1. When the residual current circuit breaker is powered on, sequentially configure the system clock of the controller and the target leakage current of the residual current circuit breaker, and generate a first power-on mark; S2, monitoring the residual current detection unit to obtain the residual current while performing the residual function configuration of the controller; S3, confirm whether the residual current is greater than the target leakage current, if so, execute step S4, otherwise continue to execute step S2 until all function configurations of the controller are completed and the first power-on flag is cleared; S4, controlling the trip coil driving unit to generate a driving level to drive the trip coil of the residual current circuit breaker to perform a tripping action, clearing the first power-on flag, and ending.

2. The residual current circuit breaker control system according to claim 1, characterized in that: The controller is also used to perform the following steps: S5. After completing all functional configurations of the controller, monitoring the residual current detection unit to obtain the residual current, and comparing the residual current with the target leakage current; S6. When the residual current is greater than the target leakage current, control the trip coil driving unit to generate a driving level to drive the trip coil of the residual current circuit breaker to perform a tripping action.

3. The residual current circuit breaker control system according to claim 1, characterized in that: The control system further comprises a communication unit; The communication unit is connected to the controller and is used to connect to a communication network to achieve communication between the controller and the communication network.

4. The residual current circuit breaker control system according to claim 3, characterized in that: The controller acquires a target leakage current of the residual current circuit breaker through the communication unit.

5. The residual current circuit breaker control system according to claim 3, characterized in that: The communication unit includes a 485 communication unit or a CAN communication unit.

6. The residual current circuit breaker control system according to claim 1, characterized in that: The control system also includes a switching power supply unit; The input end of the switching power supply unit is connected to the bus input of the residual current circuit breaker, and the output end of the switching power supply unit is respectively connected to the controller, the trip coil drive unit and the residual current detection unit, for supplying power to the controller, the trip coil drive unit and the residual current detection unit.

7. The residual current circuit breaker control system according to claim 6, characterized in that: The residual current detection unit includes a first connector, a first sampling resistor and a differential amplifier circuit; The first connector is used to connect the residual current transformer, the first end of the first sampling resistor is connected to the first end of the first connector and the first input end of the differential amplifier circuit, and the second end of the first sampling resistor is connected to the second end of the first connector and the second input end of the differential amplifier circuit; The output end of the differential amplifier circuit is connected to the signal input end of the controller.

8. The residual current circuit breaker control system according to claim 7, characterized in that: The differential amplifier circuit includes an operational amplifier chip, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a first capacitor, a second capacitor, a third capacitor and a fourth capacitor; A first end of the first capacitor is connected to a first end of the first connector and a first end of the first resistor, and a second end of the first capacitor is connected to a second end of the first connector and a first end of the second capacitor; The second end of the first resistor is connected to the first end of the second capacitor, the first end of the third capacitor, the first end of the third resistor and the non-inverting input terminal of the operational amplifier chip, and the second end of the second resistor is connected to the second end of the third capacitor, the first end of the fourth resistor, the first end of the fourth capacitor and the inverting input terminal of the operational amplifier chip; The second end of the second capacitor and the second end of the third resistor are connected to the switching power supply unit, the output end of the operational amplifier chip is connected to the first end of the fourth resistor, the first end of the fourth capacitor and the first end of the fifth resistor, and the second end of the fifth resistor is connected to the signal input end of the controller.

9. The residual current circuit breaker control system according to claim 6, characterized in that: The trip coil driving unit includes a first driving circuit, an optocoupler isolation circuit, a second driving circuit and an isolation diode; The controller of the first driving circuit is connected to the controller, the first end of the first driving circuit is connected to the second end of the optocoupler isolation circuit, the first end of the optocoupler isolation circuit and the fourth end of the optocoupler isolation circuit are respectively connected to the switching power supply unit, and the fourth end of the optocoupler isolation circuit is connected to the control end of the second driving circuit; The first end of the second driving circuit is connected to the first end of the trip coil and the anode of the isolation diode, and the second end of the trip coil and the cathode of the isolation diode are connected to the bus input of the residual current circuit breaker; The second end of the first driving circuit and the second end of the second driving circuit are grounded respectively.

10. The residual current circuit breaker control system according to claim 9, characterized in that: The first driving circuit includes a first MOS tube, a fifth capacitor, a sixth resistor and a seventh resistor; the control end of the first MOS tube is connected to the first end of the sixth resistor and the first end of the seventh resistor, the second end of the sixth resistor is connected to the control signal output end of the controller via the fifth capacitor, the first end of the first MOS tube is connected to the second end of the optocoupler isolation circuit, and the second end of the first MOS tube and the second end of the seventh resistor are grounded; and / or The second driving circuit includes a second MOS tube, an eighth resistor and a ninth resistor; the control end of the second MOS tube is connected to the first end of the eighth resistor and the first end of the ninth resistor, the second end of the eighth resistor is connected to the third end of the optocoupler isolation circuit, and the second end of the second MOS tube and the second end of the ninth resistor are grounded.

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