Circuit breaker and circuit breaker monitoring system

Abstract

The utility model relates to the technical field of circuit breakers, and discloses a circuit breaker and a circuit breaker monitoring system.The circuit breaker comprises an input electrical parameter sampling module, a communication module, a control chip and a residual current sampling and measuring module which are connected with a first power supply module, and a residual current protection module connected with a second power supply module; the control chip is connected with the input electrical parameter sampling module and the residual current sampling and measuring module, and is used for monitoring the voltage, current and residual current states of the circuit breaker in real time; the control chip is connected with the communication module and is used for realizing communication between the control chip and an external terminal; and the residual current protection module is connected with the residual current sampling and measuring module and is used for controlling the tripping operation of the circuit breaker. After the circuit breaker is opened due to the fact that the residual current exceeds the limit value, power supply of the first power supply module to the other modules is not affected, and then it is guaranteed that the other modules supply power and continue to work stably.

Description

Technical Field

[0001] The present application relates to the technical field of circuit breakers, and in particular to a circuit breaker and a circuit breaker monitoring system. Background Art

[0002] In real life, almost every place with electricity will use the residual current operated circuit breaker as an electrical component. It is mainly used to detect the residual current, compare the residual current value with the reference value, and disconnect the main circuit contacts when the residual current value exceeds the reference value. When a person is electrocuted or the grid leakage current exceeds the specified value, the residual current operated circuit breaker can quickly cut off the faulty power supply in a very short time to protect the safety of people and electrical equipment. At the same time, it can protect the line and motor from overload or short circuit. It is a widely used electrical appliance in production and life.

[0003] With the development of the Internet of Things, in order to monitor circuit data in real time, including current, voltage, temperature, power consumption, etc., to make early judgments on line safety, and to give early warnings of hidden dangers, it is possible to promptly discover hidden dangers in the line that may cause circuit fires, eliminate them in time, and prevent fires and other causes. At present, some circuit breakers can realize the functions of the Internet of Things. However, if the current residual current circuit breaker is closed, the function of obtaining the circuit status by obtaining the current and voltage at the front end cannot continue to work. Therefore, it is not conducive to the current residual current circuit breaker and is not conducive to the realization of real-time monitoring. Utility Model Content

[0004] In view of this, an embodiment of the present application provides a circuit breaker and a circuit breaker monitoring system, which can effectively realize real-time monitoring of the circuit breaker.

[0005] In a first aspect, an embodiment of the present application provides a circuit breaker, comprising: an input electrical parameter sampling module, a first power supply module, a control chip, a communication module, a residual current sampling and measuring module, a second power supply module and a residual current protection module;

[0006] The first power supply module is connected to the input electrical parameter sampling module, the communication module, the control chip and the residual current sampling and measuring module, and is used to supply power to the input electrical parameter sampling module, the communication module, the control chip and the residual current sampling and measuring module;

[0007] The second power supply module is connected to the residual current protection module and is used to supply power to the residual current protection module;

[0008] The control chip is connected to the input electrical parameter sampling module and the residual current sampling and measuring module, and is used to monitor the voltage, current and residual current state of the circuit breaker in real time;

[0009] The control chip is connected to the communication module to realize communication between the control chip and an external terminal;

[0010] The residual current protection module is connected to the residual current sampling and measuring module and is used to control the tripping operation of the circuit breaker.

[0011] In some embodiments, the first power supply module includes a voltage conversion unit;

[0012] The voltage conversion unit includes at least one input terminal and at least three output terminals;

[0013] The first output end is connected to the control chip; the second output end is connected to the residual current sampling and measuring module; and the third output end is connected to the input electrical parameter sampling module.

[0014] In some embodiments, the circuit breaker further comprises: an alarm module, an electric operation execution feedback module and a data storage chip connected to the control chip;

[0015] The alarm module is used to receive the alarm command of the control chip and perform the alarm operation;

[0016] The electric operation execution feedback module is used to execute the electric operation opening, electric operation closing and electric operation tripping operations of the circuit breaker and send the electric operation position information to the control chip;

[0017] The data storage chip is used to store the circuit breaker address information, power information and status information.

[0018] In some embodiments, the input electrical parameter sampling module includes a current sampling unit, a voltage sampling unit and a metering chip;

[0019] The current sampling unit is used to collect the current signal of the circuit breaker input terminal and convert it into a first voltage signal to transmit to the metering chip;

[0020] The voltage sampling unit is used to collect the second voltage signal of the circuit breaker input terminal and transmit it to the metering chip;

[0021] The metering chip is used to obtain instantaneous sampling information according to the received first voltage signal and the second voltage signal and transmit the instantaneous sampling information to the control chip.

[0022] In some embodiments, the current sampling unit includes a current-to-voltage converter for converting the current signal into the first voltage signal.

[0023] In some embodiments, the residual current sampling and measuring module includes: a residual current sampling circuit, a zero-sequence mutual inductor, an operational amplifier chip, and an analog-to-digital converter;

[0024] The residual current sampling circuit is used to collect the residual current signal at the output end of the circuit breaker;

[0025] The zero-sequence transformer is connected to the residual current sampling circuit and is used to convert the residual current signal into a third voltage signal;

[0026] The operational amplifier chip is connected to the zero-sequence transformer, and is used to receive the third voltage signal transmitted by the zero-sequence transformer, and after filtering and signal amplification processing on the third voltage signal, transmit it to the control chip through the analog-to-digital converter.

[0027] In some embodiments, the residual current protection module includes: a residual current monitoring chip and a trip unit;

[0028] The residual current monitoring chip is connected to the residual current sampling circuit, and is used to receive the residual current signal of the residual current sampling circuit, and send control information to the release unit according to the residual current signal;

[0029] The release unit includes a release control unit and a release; the release control unit is connected to the residual current monitoring chip and is used to receive control information sent by the residual current monitoring chip; the release control unit is connected to the release and is also used to energize the release coil to realize the release of the release.

[0030] In some embodiments, the residual current sampling and measuring module further includes a trip current monitoring unit;

[0031] The release current monitoring unit is used to monitor the current on the release coil and transmit it to the control chip.

[0032] In some embodiments, the data storage chip is one of an EEPROM chip, a FLASH chip or a SD chip.

[0033] In a second aspect, an embodiment of the present application provides a circuit breaker monitoring system, comprising at least one of the above-mentioned circuit breaker and a terminal;

[0034] The circuit breaker is connected to the terminal via the communication module, so as to realize information communication between the circuit breaker and the terminal.

[0035] The embodiments of the present application have the following beneficial effects: the circuit breaker of the present application supplies power to the input electrical parameter sampling module, the communication module, the control chip and the residual current sampling and measuring module through the first power supply module, and supplies power to the residual current protection module through the second power supply module, so that when the residual current protection module controls the circuit breaker to open due to the residual current exceeding the limit value, it will not affect the first power supply module to supply power to the input electrical parameter sampling module, the communication module, the control chip and the residual current sampling and measuring module, thereby ensuring that other modules are powered and continue to work stably. In addition, the present application realizes communication between the circuit breaker and external devices through the communication module, thereby realizing human-computer interaction and reducing the cost of manual operation and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0037] Figure 1 A first structural schematic diagram of a circuit breaker according to an embodiment of the present application is shown;

[0038] Figure 2 A second structural schematic diagram of a circuit breaker according to an embodiment of the present application is shown;

[0039] Figure 3 A structural schematic diagram of a circuit breaker monitoring system according to an embodiment of the present application is shown.

[0040] Description of main component symbols:

[0041] 1-input electrical parameter sampling module; 2-first power supply module; 3-control chip; 4-residual current sampling and measuring module; 5-second power supply module; 6-residual current protection module; 7-alarm module; 8-electrical operation execution feedback module; 9-data storage chip; 10-communication module; 11-current sampling unit; 12-voltage sampling unit; 13-metering chip; 14-residual current sampling circuit; 15-zero sequence mutual inductor; 16-operation amplifier chip; 17-analog-to-digital converter; 18-residual current monitoring chip; 19-trip unit; 20-trip current monitoring unit; 21-terminal; 22-circuit breaker. DETAILED DESCRIPTION

[0042] 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.

[0043] 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.

[0044] Hereinafter, the terms "including", "having" and their cognates that can be used in various embodiments of the present application are intended only to indicate specific features, numbers, steps, operations, elements, components or a combination 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 a combination of the foregoing items or increasing the possibility of one or more features, numbers, steps, operations, elements, components or a combination of the foregoing items. In addition, the terms "first", "second", "third" and the like are only used to distinguish descriptions and cannot be understood as indicating or implying relative importance.

[0045] 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.

[0046] In conjunction with the accompanying drawings, some embodiments of the present application are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0047] The circuit breaker is described below in conjunction with some specific embodiments.

[0048] Example 1

[0049] Figure 1 The first structural schematic diagram of the short circuit breaker of the embodiment of the present application is shown. Exemplarily, the circuit breaker includes: an input electrical parameter sampling module 1, a first power supply module 2, a control chip 3, a residual current sampling and measuring module 4, a second power supply module 5 and a residual current protection module 6.

[0050] The first power supply module 2 is connected to the input electrical parameter sampling module 1, the communication module 10, the control chip 3 and the residual current sampling and measuring module 4, and is used to supply power to the input electrical parameter sampling module 1, the communication module 10, the control chip 3 and the residual current sampling and measuring module 4; the second power supply module 5 is connected to the residual current protection module 6, and is used to supply power to the residual current protection module 6. The first power supply module in the present application is powered by taking power at the front end of the circuit breaker, thereby realizing the power supply of each module of the cabinet, and the second power supply module 5 is powered by taking power at the rear end of the circuit breaker, thereby realizing the power supply of the residual current protection module 6. It can be understood that the present application divides the power supply of the circuit breaker into front-end power supply and rear-end power supply. The front-end power supply is to supply power to the input electrical parameter sampling module 1, the communication module 10, the control chip 3 and the residual current sampling and measurement module 4 through the first power supply module 2, and the rear-end power supply is to supply power to the residual current protection module 6 through the second power supply module 5. In this way, when the residual current protection module 6 controls the circuit breaker to open due to the residual current exceeding the limit value, it will not affect the first power supply module 2 to supply power to the input electrical parameter sampling module 1, the communication module 10, the control chip 3 and the residual current sampling and measurement module 4, thereby ensuring that the input electrical parameter sampling module 1, the communication module 10, the control chip 3 and the residual current sampling and measurement module 4 continue to work stably. In addition, the present application does not require additional external power supply equipment by directly supplying power at the front and back ends of the circuit breaker.

[0051] Furthermore, the control chip 3 is connected to the input electrical parameter sampling module 1 and the residual current sampling and measuring module 4, and is used to monitor the voltage, current and residual current status of the circuit breaker in real time; specifically, the input electrical parameter sampling module 1 is used to collect the current and voltage information at the input end of the circuit breaker and transmit it to the control chip 3, and the residual current sampling and measuring module 4 is used to collect the residual current signal of the production line on the phase line and the neutral line of the power grid at the output end of the circuit breaker and transmit it to the control chip 3, and the control chip 3 transmits the received voltage, current and residual current signals to the communication module 10 for storage.

[0052] Furthermore, the circuit breaker also includes an alarm module 7, an electric operation execution feedback module 8 and a data storage chip 9 connected to the control chip 3. The alarm module 7 is used to receive the alarm command of the control chip 3 and perform an alarm operation; specifically, after the control chip 3 receives the current information and voltage information, it determines whether an alarm is required for the current information and voltage information. If an alarm is required, an alarm command is sent to the alarm module 7. The alarm module 7 performs an alarm operation according to the alarm command. If the current exceeds the preset value, an overcurrent warning can be issued. If the voltage is too high, an overvoltage warning can be issued. If the voltage is too low, an undervoltage warning can be issued. If there is a phase loss, a phase loss warning can be issued, etc. It can be understood that the above warnings are only exemplary, and the specific situation is based on the actual settings. In addition, the alarm module 7 can be implemented by an LED light, that is, different alarm information can be displayed by different LED display lights. The electric operation execution feedback module 8 is used to execute the electric operation opening, closing and tripping operations of the circuit breaker and send the electric operation position information to the control chip 3; specifically, when there are faults such as overcurrent, overvoltage, undervoltage, overpower, etc., the electric operation execution feedback module 8 can directly control the circuit breaker to open, and when the electric operation execution feedback module 8 receives the fault removal information sent by the control chip 3, it can control the circuit breaker to close. The electric operation execution feedback module 8 can monitor the position of the circuit breaker handle to realize the monitoring of the circuit breaker electric operation position and feedback to the control chip 3, so that the control chip 3 can obtain the opening and closing status of the circuit breaker in time.

[0053] Furthermore, the data storage chip 9 is used to store the circuit breaker address information, power information and status information. Specifically, the data storage chip 9 can be one of an EEPROM chip, a FLASH chip or an SD chip, and is mainly used to record the power information passing through the circuit breaker, the current opening and closing status information of the circuit breaker and the address information of the current circuit breaker. The storage of the circuit breaker address information is mainly to facilitate the distinction of circuit breakers when the external device controls multiple circuit breakers at the same time.

[0054] Furthermore, the control chip 3 is connected to the communication module 10 to realize the communication between the control chip 3 and the external cloud. The communication module 10 can be wired communication or wireless communication. If it is wired communication, RS485 communication method can be adopted; if it is wireless communication, 4G, 5G, WiFi, RoLa or other Internet of Things methods can be adopted. The present application can realize the communication between the circuit breaker and the external terminal through the communication module 10, and then achieve the real-time monitoring of the circuit breaker through the external terminal. Since the control chip 3 stores various event information of the circuit breaker, including but not limited to current information, voltage information, residual current signal, opening and closing information, fault cause and other information, the external device can access this information of each router through the communication module 10, and the external device can also send control commands to the control chip 3 through the communication module 10. The present application can realize remote human-computer interaction through the setting of the communication module 10, reduce the cost of manual operation and maintenance, and achieve the purpose of the intelligent circuit breaker. At the same time, the storage function of the data storage chip 9 can realize the local event recording function, and then the input electrical parameter sampling module 1 and the control chip 3 can realize the functions of electric energy measurement and metering. In addition to realizing the functions of the intelligent circuit breaker, it is also compatible with the function of the metering electric energy meter.

[0055] Furthermore, the residual current protection module 6 is connected to the residual current sampling and measuring module 4 to control the tripping operation of the circuit breaker. Specifically, the residual current protection module 6 can take a tripping operation on the tripper of the circuit breaker according to the residual current signal collected by the residual current sampling and measuring module 4, so that the circuit breaker can be opened to prevent the residual current from being too large and causing harm.

[0056] Example 2

[0057] On the basis of Example 1, Figure 2 As shown, more specifically, the first power supply module 2 includes a voltage conversion unit; the voltage conversion unit includes at least one input terminal and at least two output terminals; the first output terminal is connected to the control chip 3; and the second output terminal is connected to the communication module 10. Among them, the voltage conversion unit is an AC-DC conversion circuit, which can convert the input high voltage into a DC voltage output. The AC-DC conversion circuit can be used to isolate the input voltage and the output voltage. In addition, the output terminal of the voltage conversion unit includes at least two, which can realize the electrical isolation of the communication module 10, the control chip 3 and the residual current sampling and measurement module 4. The safe implementation of residual current sampling can be ensured by this electrical isolation method; further, the first output terminal and the control chip 3 and the input electrical parameter sampling module 1 are connected to realize power supply and communication isolation by the voltage conversion chip in the voltage conversion unit; the first output terminal and the control chip 3 and the residual current sampling and measurement module 4 are connected to realize feedback and measurement isolation by an isolation element.

[0058] Furthermore, the input electrical parameter sampling module 1 includes a current sampling unit 11, a voltage sampling unit 12 and a metering chip 13; the current sampling unit 11 is used to collect the current signal at the input end of the circuit breaker and convert it into a first voltage signal and transmit it to the metering chip 13; wherein the current sampling unit 11 can convert the collected current signal into a first voltage signal through a mutual inductor or a manganese copper shunt. The voltage sampling unit 12 is used to collect the second voltage signal at the input end of the circuit breaker and transmit it to the metering chip 13, and the voltage sampling unit 12 can convert the collected high voltage into a low voltage by means of a resistor voltage divider. The metering chip 13 is used to obtain instantaneous sampling information based on the received first voltage signal and the second voltage signal and transmit it to the control chip 3. wherein the instantaneous sampling information can be but is not limited to information such as current, voltage, grid frequency, power factor, power value, etc.

[0059] The current sampling unit 11 and the voltage sampling unit 12 may be implemented by a current sampling circuit and a voltage sampling circuit in the prior art, and the current sampling circuit and the voltage sampling circuit will not be described in detail herein.

[0060] Further, the residual current sampling and measuring module 4 includes: a residual current sampling circuit 14, a zero-sequence mutual inductor 15, an operational amplifier chip 16 and an analog-to-digital converter 17; the residual current sampling circuit 14 is used to collect the residual current signal at the output end of the circuit breaker; the zero-sequence mutual inductor 15 is connected to the residual current sampling circuit 14, and is used to convert the residual current signal into a third voltage signal; wherein, the residual current signal can be converted into a third voltage signal by a single zero-sequence sensor or a double zero-sequence sensor. The operational amplifier chip 16 is connected to the zero-sequence mutual inductor 15, and is used to receive the third voltage signal transmitted by the zero-sequence mutual inductor 15, and after filtering and signal amplification processing of the third voltage signal, the third voltage signal is transmitted to the control chip 3 through the analog-to-digital converter 17. The present application uses a differential input amplifier circuit composed of an operational amplifier chip 16 to realize the conversion of the residual current signal of the sampling signal into the third voltage signal amplification and conditioning, and ensures the stability of the amplified signal, smaller zero drift and a larger gain bandwidth while achieving high gain.

[0061] Furthermore, the residual current protection module 6 includes a residual current monitoring chip 18 and a trip unit 19; the residual current monitoring chip 18 is connected to the residual current sampling circuit 14, and is used to receive the residual current signal of the residual current sampling circuit 14, and send control information to the trip unit 19 according to the residual current signal; specifically, if the residual current monitoring chip 18 detects that the residual current exceeds the limit value, the control information is sent to the trip unit 19, so that the trip unit 19 controls the trip unit to trip. Among them, the residual current monitoring chip 18 can be an S54123 chip, a CN54123 chip or an M54123L chip.

[0062] Furthermore, the trip unit 19 includes a trip control unit and a trip; the trip control unit is connected to the residual current monitoring chip 18, and is used to receive control information sent by the residual current monitoring chip 18; the trip control unit is connected to the trip, and is also used to energize the trip coil to realize the tripping of the trip, thereby realizing the opening of the circuit breaker; wherein the trip includes but is not limited to a trip mechanical execution module and a circuit breaker mechanical body module, when the trip control unit requires the tripper to trip, the trip mechanical execution module is the part that realizes the tripping of the tripper; the circuit breaker mechanical body module is the part that can realize the opening and closing of the circuit breaker.

[0063] Furthermore, the residual current sampling and measuring module also includes a release current monitoring unit 20; the release current monitoring unit 20 is used to monitor the current on the release coil and transmit it to the control chip, so that the control chip 3 can obtain the release status in real time.

[0064] Furthermore, the circuit breaker of the present application may also include a temperature monitoring unit, which includes a temperature sensor. The temperature sensor can be installed near the neutral line incoming terminal, or near the live line incoming terminal, or on an internal circuit board. The temperature sensor sends the monitored temperature information to the control chip 3 so that corresponding control measures can be taken when the temperature is too high.

[0065] The circuit breaker of the present application supplies power to the input electrical parameter sampling module 1, the communication module 10, the control chip 3 and the residual current sampling and measuring module 4 through the first power supply module 2, and supplies power to the residual current protection module 6 through the second power supply module 5. In this way, when the residual current protection module 6 controls the circuit breaker to open due to the residual current exceeding the limit value, it will not affect the first power supply module 2 to supply power to the input electrical parameter sampling module 1, the communication module 10, the control chip 3 and the residual current sampling and measuring module 4, thereby ensuring that the input electrical parameter sampling module 1, the communication module 10, the control chip 3 and the residual current sampling and measuring module 4 continue to work stably. Further, the present application collects current and voltage signals in real time through the electrical parameter sampling module, and collects residual current signals in real time through the residual current protection module 6, thereby realizing real-time monitoring and early warning of the circuit breaker state to avoid the occurrence of danger. Further, the present application can use the interaction between the circuit breaker and the external device through the communication module 10, reduce the manual operation and maintenance costs, and achieve the purpose of the intelligent circuit breaker.

[0066] Example 3

[0067] Figure 3 A schematic diagram of the structure of the circuit breaker monitoring system of the embodiment of the present application is shown. Exemplarily, the circuit breaker monitoring system includes: at least one circuit breaker 22 and terminal 21 of the above-mentioned embodiment 1 and embodiment 2; the circuit breaker 22 is connected to the terminal through the communication module, which is used to realize information communication between the circuit breaker 22 and the terminal 21, so as to realize the interaction between the terminal 21 and the circuit breaker 22. The terminal 21 can be a mobile phone, a computer and other devices.

[0068] It can be understood that the options in the above embodiment are also applicable to this embodiment, so they will not be described again here.

[0069] 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 circuit breaker, characterized in that: include: Input electrical parameter sampling module, first power supply module, control chip, communication module, residual current sampling and measuring module, second power supply module and residual current protection module; The first power supply module is connected to the input electrical parameter sampling module, the communication module, the control chip and the residual current sampling and measuring module, and is used to supply power to the input electrical parameter sampling module, the communication module, the control chip and the residual current sampling and measuring module; The second power supply module is connected to the residual current protection module and is used to supply power to the residual current protection module; The control chip is connected to the input electrical parameter sampling module and the residual current sampling and measuring module, and is used to monitor the voltage, current and residual current state of the circuit breaker in real time; The control chip is connected to the communication module to realize communication between the control chip and an external terminal; The residual current protection module is connected to the residual current sampling and measuring module and is used to control the tripping operation of the circuit breaker.

2. The circuit breaker according to claim 1, characterized in that: The first power supply module includes a voltage conversion unit; The voltage conversion unit includes at least one input terminal and at least two output terminals; The first output terminal is connected to the control chip; The second output terminal is connected to the communication module.

3. The circuit breaker according to claim 1, characterized in that: The circuit breaker further comprises: an alarm module, an electric operation execution feedback module and a data storage chip connected to the control chip; The alarm module is used to receive the alarm command of the control chip and perform the alarm operation; The electric operation execution feedback module is used to execute the electric operation opening, electric operation closing and electric operation tripping operations of the circuit breaker and send the electric operation position information to the control chip; The data storage chip is used to store the address information, power information and status information of the circuit breaker.

4. The circuit breaker according to claim 1, characterized in that: The input electrical parameter sampling module includes a current sampling unit, a voltage sampling unit and a metering chip; The current sampling unit is used to collect the current signal of the circuit breaker input terminal and convert it into a first voltage signal to transmit to the metering chip; The voltage sampling unit is used to collect the second voltage signal of the circuit breaker input terminal and transmit it to the metering chip; The metering chip is used to obtain instantaneous sampling information according to the received first voltage signal and the second voltage signal and transmit the instantaneous sampling information to the control chip.

5. The circuit breaker according to claim 4, characterized in that: The current sampling unit includes a current-to-voltage converter, which is used to convert the current signal into the first voltage signal.

6. The circuit breaker according to claim 1, characterized in that: The residual current sampling and measuring module comprises: a zero-sequence mutual inductor, a residual current sampling circuit, an operational amplifier chip and an analog-to-digital converter connected in sequence; The zero-sequence transformer is used to collect the residual current signal at the output end of the circuit breaker; The residual current sampling circuit is connected to the zero-sequence transformer and is used to convert the residual current signal into a third voltage signal; The operational amplifier chip is connected to the zero-sequence transformer, and is used to receive the third voltage signal transmitted by the zero-sequence transformer, and after filtering and signal amplification processing on the third voltage signal, transmit it to the control chip through the analog-to-digital converter.

7. The circuit breaker according to claim 6, characterized in that: The residual current protection module comprises: a residual current monitoring chip and a trip unit; The residual current monitoring chip is connected to the residual current sampling circuit, and is used to receive the residual current signal of the residual current sampling circuit, and send control information to the release unit according to the residual current signal; The release unit includes a release control unit and a release; the release control unit is connected to the residual current monitoring chip and is used to receive control information sent by the residual current monitoring chip; the release control unit is connected to the release and is also used to energize the release coil to realize the release of the release.

8. The circuit breaker according to claim 7, characterized in that: The residual current sampling and measuring module also includes a trip current monitoring unit; The release current monitoring unit is used to monitor the current on the release coil and transmit it to the control chip.

9. The circuit breaker according to claim 3, characterized in that: The data storage chip is one of an EEPROM chip, a FLASH chip or an SD chip.

10. A circuit breaker monitoring system, characterized in that: comprising at least one circuit breaker and terminal according to any one of claims 1 to 9; The circuit breaker is connected to the terminal via the communication module, so as to realize information communication between the circuit breaker and the terminal.

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