A circuit breaker and its accessory module

Abstract

A circuit breaker and its accessory module, comprising at least one control module and at least one sampling module, wherein the control module is detachably mounted on the side of the circuit breaker; the sampling modules are detachably mounted on both ends of the circuit breaker with wiring terminals, at least one sampling module is arranged on the side of the circuit breaker wiring terminals, the sampling module transmits the signal collected from the circuit breaker to the control module, the control module comprises a control unit and a functional unit, and the control module drives the functional unit to operate according to the signal transmitted by the sampling module. The accessory module of the present invention is assembled on the existing circuit breaker by assembling, and the existing circuit breaker is quickly and easily modified, so that the circuit breaker has a sampling function and multiple functions such as automatic opening and closing, which is conducive to the assembly and modification of the existing circuit breaker.

Description

Technical Field

[0001] The invention relates to low-voltage electrical appliances, in particular to a circuit breaker and an accessory module thereof. Background Art

[0002] Low-voltage circuit breakers, also known as automatic air switches or automatic air circuit breakers, can be used to distribute electrical energy and protect lines and power equipment from overload and short circuit. They can also be used for infrequent line switching and infrequent motor starting. Traditional circuit breakers generally only have short-circuit protection and overload protection functions. With the improvement of people's living standards, power grid companies have put forward more requirements for power safety, such as the need for circuit breakers to automatically open and close, have leakage protection, and monitor the operating status of circuit breakers. Existing circuit breakers cannot meet actual needs due to their single functions, but replacing existing circuit breakers in large quantities is not only costly, but also difficult to operate. Summary of the invention

[0003] The object of the present invention is to overcome the defects of the prior art and provide a circuit breaker and its accessory module which are easy to assemble and fully functional.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] An accessory module for a circuit breaker comprises at least one control module and at least one sampling module, wherein the control module is detachably mounted on a side of the circuit breaker; the sampling modules are detachably mounted on two ends of the circuit breaker where wiring terminals are provided, the sampling module transmits a signal collected from the circuit breaker to the control module, the control module comprises a control unit and a functional unit, the control module drives the functional unit to operate according to the signal transmitted by the sampling module, the sampling module comprises an electronic component for collecting a main line signal of the circuit breaker, the electronic component comprises a current transformer and / or a zero sequence transformer and / or a temperature transformer and / or a voltage sampling circuit.

[0006] Furthermore, the wiring terminals of the circuit breaker include an incoming terminal and an outgoing terminal, and the number of the sampling modules is two. The two sampling modules are detachably assembled at two ends of the circuit breaker where the incoming terminal and the outgoing terminal are provided.

[0007] Furthermore, there are two sampling modules, one of which is provided with a current transformer for collecting current signals in the main circuit of the circuit breaker, and the other sampling module is provided with a zero-sequence transformer for collecting leakage current signals in the main circuit of the circuit breaker.

[0008] Furthermore, the sampling module includes a first fixing member, a first circuit board is arranged inside the first fixing member, a power board is connected to the first circuit board, the current transformer is connected to the first circuit board, the power board is used to connect to the wiring terminal of the circuit breaker, the first fixing member is provided with a wire threading hole at the installation position corresponding to the current transformer, and the current transformer transmits the sensed current signal to the first circuit board.

[0009] Furthermore, the sampling module includes a first fixing member, a first circuit board is arranged inside the first fixing member, a power board is connected to the first circuit board, the zero-sequence transformer is connected to the first circuit board, and the first fixing member is provided with a threading hole at the installation position corresponding to the zero-sequence transformer, and the zero-sequence transformer transmits the sensed leakage current signal to the first circuit board.

[0010] Furthermore, a temperature sensor is connected to the first circuit board. The temperature sensor is in contact with the power board to obtain the temperature of the circuit breaker terminal. The temperature sensor transmits the temperature signal to the first circuit board.

[0011] Furthermore, the sampling module includes a first fixing member, the first fixing member includes a first mounting groove and a second mounting groove, the first mounting groove is used to install a first circuit board, the second mounting groove is used to install a current transformer or a zero-sequence transformer, the second mounting groove is located below the first mounting groove, and a wire threading hole for passing the wire is provided in the second mounting groove.

[0012] Furthermore, a partition protrusion is provided inside the second mounting groove, and the partition protrusion divides the second mounting groove into at least two second sub-mounting grooves, and a threading hole is correspondingly provided in each second sub-mounting groove.

[0013] Furthermore, the second installation groove is in a capsule shape, the side wall of the separation protrusion is an arc-shaped concave surface, and the separation protrusion is used to separate and form a circular second sub-installation groove.

[0014] Furthermore, the first circuit board is installed in the first installation groove, and the front of the first circuit board facing the circuit breaker is provided with a power board and a plug for connecting to the control module, and the back of the first circuit board is provided with a temperature sensor. The power board runs through the first circuit board, one end of which is used to be connected to the wiring terminal of the circuit breaker, and the other end is in contact with the temperature sensor.

[0015] Furthermore, the two sampling modules are respectively connected to the incoming terminal and the outgoing terminal of the circuit breaker, wherein the sampling module connected to the incoming terminal is connected to the incoming terminal to provide working power for the entire accessory module.

[0016] Furthermore, the sampling module includes an electronic component for collecting the main line signal of the circuit breaker and a first microprocessor, and the electronic component is connected to the first microprocessor.

[0017] Furthermore, the functional unit includes an automatic opening and closing unit and / or an alarm indication unit and / or a release unit.

[0018] Furthermore, the control module also includes a communication unit, and the communication unit is connected to the control unit.

[0019] Furthermore, the number of the control modules is at least two, wherein the functional unit of one control module includes an automatic opening and closing unit, and the functional unit of the other control module includes an alarm indication unit and / or a release unit.

[0020] Furthermore, the control module includes a second fixing member, which includes a base and an upper cover. A hook assembled on the circuit breaker is provided on the base, and a groove matching the hook is provided on the housing of the circuit breaker.

[0021] Furthermore, the control module includes a second circuit board and an automatic opening and closing unit, the automatic opening and closing mechanism includes a control handle, a transmission mechanism and a tripping structure, the control handle is linked to the handle of the circuit breaker, the control handle is linked to the transmission mechanism, the tripping structure is linked to the operating mechanism of the circuit breaker, and a controller is provided on the second circuit board. The controller can control the transmission mechanism to drive the control handle to drive the handle of the circuit breaker to achieve the closing operation of the circuit breaker according to the signal from the sampling module, and the controller can control the transmission mechanism to drive the tripping structure to trigger the operating mechanism of the circuit breaker to trip to achieve the opening operation of the circuit breaker.

[0022] Furthermore, the control module includes a second circuit board and a release unit, the release unit includes a release, and a controller is provided on the second circuit board. The controller can control the release to trigger the operating mechanism of the circuit breaker to trip according to a signal from the sampling module.

[0023] Furthermore, the control module is also provided with a test button and a test circuit, and the test circuit is operated by the test button to generate a simulated leakage current.

[0024] Furthermore, the sampling module includes a first circuit board, on which a signal unit is provided, and the control module includes a second circuit board, on which a controller is provided; the sampling module and the control module transmit signals through a signal transmission unit, and the signal transmission unit includes a plug arranged on the first circuit board and a socket arranged on the second circuit board, and the plug and the socket cooperate to realize signal transmission between the signal unit and the controller.

[0025] Furthermore, there are multiple control modules, which are arranged side by side on the same side of the circuit breaker. The signal transmission unit also includes an intermediate circuit board. The first circuit board is provided with an extension plug connected to the intermediate circuit board. The intermediate circuit board is provided with an intermediate plug and an intermediate socket. The intermediate socket cooperates with the extension plug of the first circuit board, and the intermediate plug cooperates with the sockets of the second circuit board respectively.

[0026] Furthermore, the intermediate circuit board also includes a second expansion plug for mating with another intermediate circuit board.

[0027] A circuit breaker is provided with the accessory module of the circuit breaker as described above.

[0028] A circuit breaker comprises a shell, in which at least two phase poles are arranged, each phase pole comprises wiring terminals arranged at two ends, the above-mentioned accessory module is assembled on the shell, and the sampling module is connected to the wiring terminal of each phase pole of the circuit breaker.

[0029] The present invention provides a circuit breaker and its accessory module. The accessory module is assembled on an existing circuit breaker by assembling, so that the existing circuit breaker can be modified quickly and easily. The accessory module is coordinated by a sampling module and a control module. The control module obtains the operating status of the circuit breaker through the sampling module and drives the functional unit to operate according to the operating status, so that the circuit breaker has a sampling function and multiple functions such as automatic opening and closing, which is conducive to the assembly and modification of the existing circuit breaker.

[0030] In addition, the electronic components arranged on the first circuit board in the sampling module can collect different signals through free combination to meet the signal collection requirements of different circuit breakers.

[0031] In addition, the control module is provided with a communication unit, which can realize the communication connection between the circuit breaker and the circuit breaker, the circuit breaker and the client, and the circuit breaker and the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is a schematic diagram of the accessory module in the present invention;

[0033] Figures 2 to 4 is a schematic diagram of the circuit breaker and its accessory modules in the present invention;

[0034] Figure 5 It is a schematic diagram of the structure of the circuit breaker and its accessory modules in the present invention;

[0035] Figure 6 It is a schematic diagram of the structure of the circuit breaker in the present invention (circuit breaker without accessory modules assembled);

[0036] Figures 7-8 It is a structural schematic diagram of the circuit breaker of the present invention;

[0037] Fig. 9 It is a schematic diagram of the structure of the accessory module in the present invention;

[0038] Figures 10-12 It is a structural schematic diagram of the sampling module in the present invention;

[0039] Fig.13 It is a structural schematic diagram of the first fixing member of the sampling module in the present invention;

[0040] Fig.14 It is a structural schematic diagram of the sampling module in the present invention (equipped with a zero-sequence mutual inductor);

[0041] Fig.15 It is a structural schematic diagram of the sampling module in the present invention (equipped with a current transformer);

[0042] Fig.16 It is a structural schematic diagram of the sampling module in the present invention (with a temperature sensor installed);

[0043] Fig.17 It is a schematic diagram of the structure of the sampling module in the present invention (with an intermediate circuit board installed);

[0044] Figures 18 to 20 is a schematic structural diagram of an intermediate circuit board of the present invention;

[0045] Fig.21 It is a structural schematic diagram of the control module in the present invention (close to the upper cover);

[0046] Fig. 22 It is a structural schematic diagram of the tripping mechanism and the operating mechanism of the circuit breaker in the present invention;

[0047] Figures 23 to 25 It is a structural schematic diagram of the control module in the present invention (close to the base side). DETAILED DESCRIPTION

[0048] The following is combined with Figures 1 to 25 The given embodiments further illustrate the specific implementation of a circuit breaker and its accessory module of the present invention. A circuit breaker and its accessory module of the present invention are not limited to the description of the following embodiments.

[0049] like Figure 1-8As shown, an accessory module of a circuit breaker includes at least one control module 2 and at least one sampling module 1. The control module 2 is detachably mounted on the side of the circuit breaker 3. The sampling module 1 is detachably mounted on one or both ends of the circuit breaker 3 where wiring terminals are provided. At least one sampling module 1 is connected to the wiring terminals of the circuit breaker 3. The sampling module 1 is used to collect signals reflecting the operating conditions of the main lines of each pole of the circuit breaker 3. The sampling module 1 transmits the signals collected from the circuit breaker 3 to the control module 2. The control module 2 includes a control unit and a functional unit. The control module 2 determines the operating conditions of the main lines of each pole of the circuit breaker 3 according to the signals transmitted by the sampling module 1, and drives the functional unit to operate.

[0050] The actions of the functional unit include driving the circuit breaker 3 to automatically open and close and / or issuing a warning alarm and / or displaying the circuit breaker status and / or remotely communicating with the host computer, etc. Figure 21-22 In the embodiment of a control module 2 shown in FIG. 1 , the control module 2 is assembled on the side of the circuit breaker 3 and can be used as a control pole of the circuit breaker 3 to realize automatic opening and closing of the circuit breaker 3. The control module 2 and the operating mechanism 32 of the circuit breaker 3 (see FIG. 1 ) are connected. Fig. 22 ), and the handle is linked and connected, and the automatic opening and closing function of the circuit breaker 3 is realized by driving the operating mechanism 32 and the handle action.

[0051] The sampling module 1 includes one or more electronic components for realizing its sampling function. The number of each electronic component can be set according to the number of poles of the circuit breaker 3. The electronic components include current transformers 14 and / or zero-sequence transformers 15 and / or temperature sensors 16 and / or voltage acquisition circuits, etc. The electronic components transmit the signals collected by the electronic components to the control module 2. The control unit of the control module 2 drives the function unit to act according to the operating conditions of the main lines of each pole of the circuit breaker 3 collected by the sampling module 1. The actions of the function unit include driving the circuit breaker 3 to automatically open and close and / or issue a warning alarm. For example, the electronic component is a current transformer 14, and the control module 2 determines whether there is an overcurrent according to the current signal collected by the current transformer 14. When the overcurrent lasts for a certain period of time, it is considered that the circuit breaker 3 has an overload fault, and the circuit breaker 3 is driven to open to achieve circuit protection. For another example, the electronic component is a zero-sequence transformer 15, and the control module 2 determines whether there is a leakage current signal according to the current signal collected by the zero-sequence transformer 15, and drives the circuit breaker 3 to open when there is a leakage current signal. For another example, the electronic component is a temperature sensor 16. When it is detected that the temperature of the wiring terminal of the circuit breaker 3 is high, the control module 2 controller function unit alarms and reminds the user through an indicator light and / or a buzzer, etc. For another example, the electronic component includes a voltage divider resistor for implementing a voltage sampling circuit. The voltage sampling is implemented through the voltage divider resistor, and the voltage signal is transmitted to the control module 2. The control module 2 determines based on the voltage signal that when there is an undervoltage or overvoltage fault, it drives the circuit breaker 3 to open.

[0052] In the present application, the accessory module of the circuit breaker includes one or more control modules 2 and one or more sampling modules 1. The wiring terminals of the circuit breaker 3 include input terminals and output terminals. The sampling modules 1 are correspondingly connected to the input terminals and / or output terminals of the circuit breaker 3. When two sampling modules 1 respectively connected to the input terminals and the output terminals are included at the same time, the sampling module 1 connected to the input terminals is preferably used to provide the working power of the entire accessory module.

[0053] like Figure 2The assembly embodiment of the accessory module of a circuit breaker shown includes a control module 2 and a sampling module 1. The control module 2 is detachably assembled on one side of a four-pole circuit breaker. The sampling module 1 is installed at one end of the incoming terminal of the circuit breaker 3. The sampling module 1 directly transmits the signal collected from the circuit breaker 3 to the control module 2. The control module 2 includes a control unit and a functional unit. The control unit includes a second microprocessor MCU2. The second microprocessor MCU2 makes a judgment based on the signal collected from the circuit breaker 3 by the sampling module 1 to drive the functional unit to act. Preferably, the control module 2 is also provided with a communication unit. The communication unit realizes the communication connection between multiple control modules 2 by wireless or Bluetooth. Correspondingly, multiple circuit breakers 3 equipped with the control module 2 in this embodiment can also realize communication connection through the communication unit. The communication unit can adopt RS485, WIFI module, Bluetooth module or SIM card, etc. In addition, the communication unit can also realize signal transmission between the circuit breaker 3 and the client, user APP, cloud platform and equipment.

[0054] like Figure 3 Another assembly embodiment of an accessory module of a circuit breaker shown includes a control module 2 and a sampling module 1, and the control module 2 is detachably assembled on one side of a four-pole circuit breaker. The sampling module 1 includes a signal unit, which processes the signal collected by the electronic component and transmits it to the control module 2, such as converting an analog signal into a digital signal, converting a high voltage into a low voltage or direct current, and then transmitting it to the control module 2. Preferably, the signal unit includes a microprocessor, and the processor in this embodiment is a first microprocessor MCU1. Preferably, the sampling module 1 includes a signal transmission unit, and the sampling module 1 is connected to the control module 2 by a signal transmission unit arranged between the control module 2 and the sampling module 1. The sampling module 1 transmits the signal collected from the circuit breaker 3 to the control module 2 through the signal transmission unit, or the sampling module 1 transmits the processed signal to the control module 2 through the signal transmission unit. Preferably, the signal transmission unit can also play the role of transmitting power. The signal transmission unit makes the connection between the sampling module and the control module simpler and convenient for transmission.

[0055] like Figure 4Another assembly embodiment of an accessory module of a circuit breaker shown in the figure includes two control modules 2 and two sampling modules 1. The two control modules 2 are detachably assembled side by side on one side of the four-pole circuit breaker. The two sampling modules 1 are detachably assembled on the incoming terminal and the outgoing terminal at both ends of the four-pole circuit breaker. The sampling module 1 connected to the incoming terminal provides power to the accessory module as a whole. The two sampling modules 1 are respectively connected to the two control modules 2 through their own signal transmission units. The sampling module 1 is connected to multiple control modules 2 through the signal transmission unit. When multiple control modules 2 are connected, the signal transmission unit also plays a role in mutual transmission of signals between the control modules 2.

[0056] like Figure 9-15 as well as Fig.17 As shown, the sampling module 1 includes a first fixing member for assembling the sampling module 2 on the circuit breaker 3, a first circuit board 12 is arranged inside the first fixing member, a power board 13 and a plug 121 are connected to the first circuit board 12, the power board 13 is used to connect to the wiring terminals of the circuit breaker 3, and the number of power boards 13 corresponds to the number of wiring terminals of each pole of the circuit breaker 3; the plug 121 is connected to the control module 2, and is used to realize signal transmission between the first circuit board 12 and the control module 2. The power board 13 and the plug 121 vertically pass through one side of the first fixing member, wherein the shape and structure of the power board 13 are adapted to the structure of the wiring terminals of the circuit breaker 3.

[0057] The first circuit board 12 is also connected with one or more electronic components for realizing its sampling function. The number of each electronic component is set according to the number of poles of the circuit breaker 3. The electronic components are such as current transformer 14, zero sequence transformer 15 and temperature sensor 16. Correspondingly, a signal unit connected to the corresponding electronic component is provided on the first circuit board 12. The signal unit is connected to the control module 2 through a signal transmission unit. The signal unit can transmit the signal collected by the electronic component to the control module 2 through the signal transmission unit, or the signal collected by the electronic component can be transmitted to the control module 2 through the signal transmission unit after processing. The preferred signal unit adopts a microprocessor. In this application, the microprocessor set on the first circuit board 12 is MUC1. The electronic component is connected to the first microprocessor MCU1. The first microprocessor MCU1 obtains signals such as voltage, current and temperature through a sampling circuit. Through the combination of multiple electronic components, the sampling module 1 can have different signal acquisition functions at the same time. Of course, the signal unit can also be a circuit such as step-down, voltage stabilization, filtering, analog-to-digital conversion, etc.

[0058] Combination Figure 10-12 as well as Fig.15A first embodiment of a sampling module 1 is provided. The sampling module 1 is a current sampling module, and the sampling module 1 includes a current transformer 14. In this embodiment, the sampling module 1 is used to detect whether there is an overcurrent in the main circuit of the circuit breaker 3. A first circuit board 12 is provided in the first fixing member, and a power board 13 is connected to the first circuit board 12. The current transformer 14 is connected to the first circuit board 12. The power board 13 is used to connect to the wiring terminal of the circuit breaker 3. The first fixing member is provided with a threading hole at the installation position corresponding to the current transformer 14, so that the conductor connected to the circuit breaker passes through the threading hole and passes through the current transformer 14 when connected to the wiring terminal, so that the current transformer 14 is connected to the circuit breaker. On the main line of the circuit breaker 3, preferably, there are multiple current transformers 14, and a current transformer 14 is connected on each pole main line of the circuit breaker 3. The current transformer 14 transmits the sensed current signal to the first circuit board 12. The first microprocessor MCU1 on the first circuit board 12 transmits the current signal to the control module 2 through the signal transmission unit. The control module 2 determines whether there is an overcurrent in the main line of the circuit breaker 3. When the control module 2 determines that there is an overcurrent in the main line, the control module 2 drives the functional unit to operate to automatically open the circuit breaker 3.

[0059] Furthermore, at least one current transformer 14 among the multiple current transformers 14 is used for arc fault monitoring. The current transformer 14 transmits the collected arc fault signal to the first circuit board 12. The first microprocessor MCU1 of the first circuit board 12 transmits the arc fault signal to the control module 2. After receiving the arc fault signal, the control module 2 activates the functional unit, such as driving the circuit breaker 3 to automatically open, or causing the circuit breaker 3 to issue an alarm.

[0060] Furthermore, it also includes a voltage sampling circuit for detecting voltage, which implements voltage sampling through a voltage-dividing resistor and transmits the voltage signal to the control module 2. The voltage sampling circuit is arranged on the first circuit board 12 and collects the voltage signal of the circuit breaker through the power board 13.

[0061] Combination Fig.14A second embodiment of the sampling module 1 is provided, wherein the sampling module 1 is a leakage sampling module, and the sampling module 1 includes a zero-sequence transformer 15. The sampling module 1 includes a first fixing member, a first circuit board 12 is arranged in the first fixing member, a power board 13 is connected to the first circuit board 12, the zero-sequence transformer 15 is connected to the first circuit board 12, and the first fixing member is provided with a threading hole at the installation position corresponding to the zero-sequence transformer 15. In this embodiment, the sampling module 1 is used to detect whether there is leakage current in the main circuit of the circuit breaker 3, so that the sampling module 1 has the function of detecting whether there is leakage current in the main circuit of the circuit breaker 3, and the zero-sequence transformer 15 is connected to the main circuit of the circuit breaker 3. Preferably, the zero-sequence transformer 15 is a capsule-shaped zero-sequence transformer 15, and each pole main circuit of the circuit breaker 3 passes through the center hole of the same zero-sequence transformer 15. Of course, multiple zero-sequence transformers 15 can also be provided, corresponding to each pole main circuit of the circuit breaker 3, but the connection lines of multiple zero-sequence transformers 15 are relatively more, and the cost is high. The leakage current that can be detected by the zero-sequence transformer 15 includes a sudden or slowly rising sinusoidal residual current, a smooth DC current, etc. The zero-sequence transformer 15 transmits the sensed leakage current signal to the first circuit board 12. The first microprocessor MCU1 of the first circuit board 12 transmits the leakage current signal to the control module 2 through the signal transmission unit. The control module 2 drives the functional unit to operate to automatically open the circuit breaker 3.

[0062] Combination Fig.16 A third embodiment of the sampling module 1 is provided, wherein the sampling module 1 is a temperature sampling module, and the sampling module 1 includes a temperature sensor 16. The temperature sensor 16 is connected to the first circuit board 12, and the temperature sensor 16 is in contact with the power board 13. The temperature of the terminal is obtained through the power board 13, so that the sampling module 1 has the function of detecting the temperature rise and temperature of the terminal. Preferably, the power board 13 is made of a metal material with good electrical and thermal conductivity. The temperature sensor 16 can obtain the temperature by directly contacting or not directly contacting the power board 13. When the temperature sensor 16 collects the temperature rise or temperature of the terminal of the circuit breaker 3, the temperature sensor 16 transmits the temperature signal to the first circuit board 12, and the first microprocessor MCU1 of the first circuit board 12 transmits the temperature signal to the control module 2 through the signal transmission unit, and the control module 2 drives the functional unit to act. Preferably, the temperature sensor 16 is arranged on the back side of the first circuit board 12, and the power board 13 is welded to the first circuit board 12, and the power board 13 passes through the first circuit board 12, one end of which is used to connect to the wiring terminal of the circuit breaker, and the other end is in contact with the temperature sensor 16.

[0063] The above three embodiments of the sampling module 1 can be used individually or in combination of any two or three. For example, a current transformer 14 and a zero-sequence transformer 15 are simultaneously set in the same sampling module 1, or a current transformer 14 and a temperature sensor 16 are simultaneously set in the same sampling module 1, or a current transformer 14 and a temperature sensor 16 are simultaneously set in the same sampling module 1, or all three are simultaneously set.

[0064] A preferred solution is that the accessory module includes two sampling modules, which are respectively installed at both ends of the circuit breaker 3, the current transformer 14 and the zero-sequence transformer 15 are respectively arranged in the two sampling modules 1, and the temperature sensor 16 can be arranged in any one of the sampling modules, or the temperature sensor 16 is arranged in both sampling modules 1.

[0065] Combination Figure 6 and Figure 9-18 A specific installation structure of a sampling module 1 is provided, and the installation structure enables the sampling module 1 to be equipped with one or more electronic components. The sampling module 1 includes a first fixing member, and the first fixing member includes a first installation groove 171 and a second installation groove 172. The first installation groove 171 is used to install a first circuit board 12, and the second installation groove 172 is used to install a current transformer 14 or a zero-sequence transformer 15. The second installation groove 172 is located below the first installation groove 171, and a threading hole for a wire to pass through is provided in the second installation groove 172. Specifically, the first fixing member includes a cover shell 111 and a cover plate 112. The cover shell 111 is provided with a first mounting groove 171 and a second mounting groove 172. The cover plate 112 covers the first mounting groove 171 to form a mounting cavity for installing the first circuit board 12. A plurality of through holes are provided on the cover plate 112. The through holes allow the power board 13 and the plug 121 to extend out of the first fixing member, which is used to connect to the wiring terminals of the circuit breaker 3. By tightening the wiring screws of the wiring terminals, the power board 13 is fixedly connected and electrically connected to the wiring terminals. The power board 13 can collect corresponding signals from the wiring terminals, and the sampling module 1 and the control module 2 obtain working power through the power board 13.

[0066] Combination Fig. 9 , 10 , 12, 14 and 15 provide a structure of a power board 13, wherein the power board 13 is a straight plate structure, one end of the power board 13 is welded to the first circuit board 12, the other end of the power board 13 passes through the first fixing piece, and a groove is provided at the end passing through the first fixing piece for connecting with the wiring terminal. The power board 13 with such a structure is suitable for a bus 34 provided at the wiring terminal of the circuit breaker 3, and the power board 13 is in contact with the bus 34. When the wiring screws of the circuit breaker 3 are tightened, the power board 13 is reliably connected to the wiring board of the circuit breaker 3.

[0067] When the busbar 34 is not provided in the circuit breaker 3, the structure of the power board 13 is as follows: Fig.11 As shown, the power board 13 is a Z-shaped plate structure as a whole. One end of the power board 13 is welded to the first circuit board 12, and the other end of the power board 13 passes through the first fixing member and is bent in a direction parallel to the side wall of the circuit breaker 3. The end is bent again and extends toward the circuit breaker 3 for connection with the wiring terminal of the circuit breaker 3.

[0068] The second mounting groove 172 is located below the first mounting groove 171. A threading hole and a separation protrusion 173 are provided in the second mounting groove 172. The number of the threading holes is the same as the number of poles of the circuit breaker 3. The threading holes correspond to the wiring holes 33 on the circuit breaker 3. The threading holes are provided for the wires 35 of each pole line of the circuit breaker 3 (see Figure 5 ) through; the number of the separating protrusions 173 is at least one, and the separating protrusions 173 separate the second mounting groove 172 into at least two second sub-mounting grooves 174, and each second sub-mounting groove 174 has a corresponding threading hole. Preferably, the second mounting groove 172 is as Fig.13 The shape is shown as a capsule, and the side wall of the separation protrusion 173 is set as an arc-shaped concave surface, so that each second sub-installation groove 174 is circular, so that the second installation groove 172 can be used to install the zero-sequence transformer 15 or the current transformer 14, and the first fixing piece can be universal. The zero-sequence transformer 15 is correspondingly set to a capsule shape, so that the zero-sequence transformer 15 is installed in accordance with the inner wall of the second installation groove 172, and the separation protrusion 173 can pass through the middle of the zero-sequence transformer 15; at least two current transformers 14 are arranged in the first fixing piece, and each current transformer 14 is correspondingly assembled in a second sub-installation groove 174, and two adjacent current transformers 14 are separated by the separation protrusion 173.

[0069] Furthermore, a first fixing portion is provided on the first fixing member, and the first fixing portion is used to cooperate with the control module 2 and the housing 31 of the circuit breaker 3, and the sampling module 1 is assembled at both ends of the control module 2 and the circuit breaker 3 (the control module 2 can be regarded as a control pole of the circuit breaker 3 after being assembled on the circuit breaker 3). Figure 9-15 As shown, the first fixing portion is a buckle 18 arranged on the edge of the cover shell 111. Accordingly, a slot 311 structure matching with the buckle 18 is provided on the control module 2 and the housing 31 of the circuit breaker 3. The first fixing portion is not limited to the buckle structure.

[0070] The control module 2 includes a control unit and a functional unit. A second circuit board 22 is provided in the control module 2, and a control unit is provided on the second circuit board 22. The functional unit operates under the drive of the control unit, and the functional unit includes an automatic opening and closing unit and / or an alarm indication unit and / or a release unit.

[0071] like Figure 5-9 as well as Figure 21-25 As shown, the control module 2 includes a second fixing part, in which a control unit and a functional unit are assembled, and the second fixing part assembles the control module 2 on one side of the circuit breaker 3. The second fixing part includes a base 211 and an upper cover 212, and the shape of the second fixing part is similar to the housing of the circuit breaker. Preferably, an assembly structure that matches the housing 31 of the circuit breaker 3 is provided on the base 211. In the present application, preferably, a hook 2111 is provided on the base 211, a groove 312 that matches the hook 2111 is provided on the housing 31 of the circuit breaker 3, and a linkage hole is provided on the base 211 for realizing linkage connection with the operating mechanism 32 of the circuit breaker 3. In addition, a connecting hole is provided on the second fixing part, and the connecting hole is used for the signal transmission unit to connect the control module 2 with the sampling module 1.

[0072] Combination Figure 5 , 921 provides an embodiment of a control module 2, and provides an embodiment of a control module 2, which is an automatic opening and closing control module, and the automatic opening and closing control module includes a control unit, a functional unit and a communication unit, and the functional unit includes an automatic opening and closing unit. The automatic opening and closing control module of this embodiment and the temperature sampling module provided with a temperature sampling module, and the current sampling module provided with a current transformer 14 and a voltage sampling circuit can constitute an accessory module; the automatic opening and closing control module can upload the collected temperature, current and voltage signals to the host computer through the communication unit, and judge whether there is an overcurrent to implement overcurrent protection according to the current signal collected by the current transformer 14, and judge based on the collected voltage signal, which can constitute an accessory module for implementing undervoltage / overvoltage protection. A second circuit board 22 and a functional unit are provided in the second fixing member, and a controller for driving the control unit of the functional unit is provided on the second circuit board 22. In this embodiment, the functional unit includes an automatic opening and closing unit, and the automatic opening and closing unit includes a control handle 23 arranged on the second fixing member and a transmission mechanism 24 and a tripping structure arranged in the middle of the second fixing member. The control handle 23 is linked to the handle of the circuit breaker 3, and the tripping structure is linked to the operating mechanism of the circuit breaker 3. The controller can control the transmission mechanism 24 to drive the control handle 23 to drive the handle of the circuit breaker 3 to realize the closing operation of the circuit breaker, and control the transmission mechanism 24 to drive the tripping structure to trigger the operating mechanism of the circuit breaker 3 to trip to realize the opening operation of the circuit breaker. A controller is provided on the second circuit board 22, and the controller is preferably a microcontroller. In the application, the microcontroller provided on the second circuit board 22 is a second microprocessor MCU2, and the second microprocessor MCU2 can control the transmission mechanism 24 to open and close the switch. After the sampling module 1 transmits the collected signal or the collected and processed signal to the second microprocessor MCU2 of the second circuit board 22, the second microprocessor MCU2 processes and judges the received signal, and then drives the transmission mechanism 24 to operate to realize the automatic opening and closing of the circuit breaker 3.

[0073] The transmission mechanism 24 of this embodiment includes a motor system, a gear set connected to the motor system, and a drive assembly matched with the gear set. The motor system rotates forward or reversely under the drive of the second microprocessor MCU2, thereby driving the gear set to perform opening or closing rotation and cooperate with the drive assembly. When the motor system rotates to close, it drives the gear set to rotate in the closing direction, the gear set actuates the drive assembly and drives the control handle 23 to rotate in the closing direction, the handle of the circuit breaker 3 also rotates in the closing direction under the action of the control handle 23, and drives the operating mechanism 32 of the circuit breaker 3 and the contact mechanism connected to the operating mechanism 32 to close; when the motor system rotates to open, it drives the gear set to rotate in the opening direction, the gear set actuates the drive assembly to drive the tripping structure, and the tripping structure triggers the operating mechanism 32 of the circuit breaker 3 to trip, so that the circuit breaker 3 is opened.

[0074] like Fig.21 As shown, the motor system includes a motor and a worm gear, the worm gear is connected between the motor and the gear set, the gear set includes a plurality of gears meshing with each other, the drive assembly includes a drive rod 242, the drive rod 242 is assembled on a gear in the gear set, the drive rod 242 can cooperate with the control handle 23, preferably, a boss structure cooperating with the drive rod 242 is provided on the control handle 23, when the gear set is closed, the drive rod 242 and the control handle 23 are limited and cooperated to drive the control handle 23 to rotate in the closing direction, preferably, a track groove is provided near the second fixing member near the control handle 23, and the track groove is used to limit the movement trajectory of the drive rod 242.

[0075] The tripping structure and the driving rod 242 are respectively located on the front and back sides of the gear set, wherein the tripping structure is located on the back side of the gear set, i.e., the side close to the circuit breaker 3. The driving assembly cooperating with the tripping structure includes a pushing portion (not shown), and the pushing portion protrudes on the back side of a gear in the gear set. The tripping structure includes a pushing rod 241 and a linkage shaft 253. The pushing rod 241 is rotatably assembled in the control module 2, and the linkage shaft 253 passes through the second fixing member and is linked with the operating mechanism 32 of the circuit breaker 3. Specifically, the linkage shaft 253 is linked with the lock 321 of the operating mechanism 32. The pushing portion is preferably a boss structure arranged on the gear. When the gear set rotates to open the gate, the pushing portion causes the pushing rod 241 to rotate and then pushes the linkage rod. The lock 321 rotates under the action of the linkage rod to activate the operating mechanism 32 and open the circuit breaker 3. The structure of the cooperation between the pushing rod 241 and the operating mechanism 32 of the circuit breaker 3 can be referred to. Fig. 22 , wherein the operating mechanism 32 is located in the housing of the circuit breaker 3 , the push rod 241 is rotatably assembled in the control module 2 , and the linkage shaft 253 passes through the second fixing member to be linked with the operating mechanism 32 of the circuit breaker 3 .

[0076] like Figure 22-25As shown, an embodiment of a control module 2 is provided, which is a trip control module. The trip control module includes a control unit and a functional unit. The functional unit includes a trip unit. The trip unit includes a trip 251. The controller can control the trip 251 to trigger the tripping of the operating mechanism of the circuit breaker 3 according to the signal from the sampling module 1. The trip control module of this embodiment and the current sampling module provided with the current transformer 14 can constitute an accessory module for realizing overcurrent protection; and the leakage sampling module provided with the zero sequence transformer 15 can constitute an accessory module for realizing leakage protection; based on the voltage signal collected by the sampling module, it can constitute an accessory module for realizing undervoltage / overvoltage protection. The trip mechanism 25 includes a trip 251 driven by the second microprocessor MCU2 of the second circuit board 22. The trip 251 is an electromagnetic trip. One end of the top rod 252 of the trip 251 pushes the linkage shaft 253. Preferably, the top rod 252 triggers the push rod 241 in the driving assembly to drive the linkage shaft 253 to drive the operating mechanism 32 to move. When the second microprocessor MCU2 receives the signal transmitted by the sampling module 1, when the second microprocessor MCU2 determines that there is an overcurrent in the main line of the circuit breaker 3 and the overcurrent reaches a threshold value preset by the second microprocessor MCU2, the second microprocessor MCU2 drives the release 251 to operate, and the top rod 252 of the release 251 operates, so that the push rod 241 pushes the linkage shaft 253 to operate and the circuit breaker 3 is opened; in addition, when the second microprocessor MCU2 receives the signal transmitted by the sampling module 1 and determines that the circuit breaker 3 has an over / under voltage fault, an arc fault, and a leakage fault, it can also drive the release 251 to operate and open the circuit breaker 3.

[0077] like Fig.25 As shown, another embodiment of a control module 2 is provided, wherein the functional unit includes a tripping mechanism 25, and the control module 2 is further provided with a test button 26 and a test circuit, wherein the test circuit can be operated by the test button 26 to generate a simulated leakage current for detecting the action characteristics of the circuit breaker 3. The test button 26 is mounted on the second fixing member, and the test circuit is connected to the main circuit of the circuit breaker 3 through the second circuit board 22. Preferably, the on and off of the test circuit is controlled by a micro switch 222 provided on the second circuit board 22, and the micro switch 222 can be triggered by the test button 26.

[0078] By assembling the above-mentioned accessory module on the existing circuit breaker, a circuit breaker with a single function can be transformed into a circuit breaker with multiple functions, so that the transformed circuit breaker can collect various operating status information of the main line of the circuit breaker, and realize automatic opening and closing and / or issuing of warnings under the action of the functional unit according to the operating status information.

[0079] Combination Figure 7-8 as well as Figure 23-25Another embodiment of the control module 2 is introduced, in which the functional unit in the control module 2 includes a tripping mechanism 25 and an alarm indication unit, which is used to indicate the operating status of the main line of each pole of the circuit breaker 3. The alarm indication unit is arranged on the second circuit board 22, and the alarm indication unit is controlled by the second microprocessor MCU2 on the second circuit board 22. After the sampling module 1 transmits a signal to the control module 2, the control module 2 triggers the alarm indication unit to issue an alarm after processing and judging that there is a fault in the main line.

[0080] Specifically, the first microprocessor MCU1 of the sampling module 1 obtains signals such as voltage, current or temperature through a sampling circuit, and the sampling circuit includes an electronic component for collecting the main line signal of the circuit breaker 3. The signal unit determines the type of fault and the fault location of the circuit breaker 3 according to the signal collected by the sampling circuit. The fault location is the pole of the circuit breaker 3 where the fault is located. The first microprocessor MCU1 forms a fault code according to a preset rule and sends it to the second microprocessor MCU2 of the control module 2 through a signal transmission unit. The second microprocessor MCU2 translates the fault code according to the preset rule and triggers the alarm indication unit to issue an alarm. For example, a two-digit code is used, the first digit "1-8" represents the fault location, that is, the four-phase wiring terminals (incoming terminals and outgoing terminals) of the circuit breaker 3, and the second digit "1-6" represents the fault type. When the first microprocessor MCU1 determines that the temperature of the phase B incoming terminal is too high, a fault code "24" is issued. After receiving the fault code, the second microprocessor MCU2 translates the corresponding fault information and drives the alarm indication unit to issue an alarm. Of course, other types of coding rules are also applicable.

[0081] In this embodiment, the alarm indication unit includes one or more of a state indication mechanism, a sound alarm device and a temperature indication mechanism.

[0082] Combination Figure 7 , 23An embodiment of an alarm indication unit in a first control module 2 is provided, wherein the alarm indication unit includes a status indication mechanism, wherein the status indication mechanism includes a first light-emitting element 223 and a first light guide column 224, wherein the first light-emitting element 223 is preferably a light-emitting diode, wherein the first light guide column 224 corresponds to the first light-emitting element 223, and a portion of the first light guide column 224 is exposed on the surface of the control module 2, specifically on the surface of the second fixing member, for displaying the status of the first light-emitting element 223, which is convenient for observing the status of the first light-emitting element 223, wherein the first light-emitting element 223 can indicate different statuses of the circuit breaker 3 under the control of the second microprocessor MCU2, wherein the first light-emitting element 223 preferably indicates the working status of the circuit breaker 3 by displaying a color or a light-emitting frequency, for example, when the circuit breaker 3 is in a normal working state, the first light-emitting element 223 displays green, and when the circuit breaker 3 trips due to an overcurrent, the first light-emitting element 223 displays red, and when the circuit breaker 3 is over / under-voltage, displays yellow, etc.

[0083] Combination Fig.24 Provided is an embodiment of the alarm indication unit in the second control module 2, wherein the sound alarm device includes a buzzer 228 and an alarm. When the circuit breaker 3 has an overcurrent, over / undervoltage, or leakage fault, the second microprocessor MCU2 triggers the buzzer 228 to sound an alarm to remind the circuit breaker 3 of a fault. Similarly, a plurality of buzzers 228 can be provided, so that each pole of the circuit breaker 3 corresponds to a buzzer 228. When the circuit breaker 3 has an arc fault, the second microprocessor MCU2 activates the alarm, and the alarm detects whether there is a fire hazard. Preferably, the first embodiment of the alarm indication unit in the control module 2 is used in combination with the second embodiment. At this time, the sound alarm device can be provided with only one buzzer 229, and the fault location is indicated by multiple first light-emitting elements 223 in the status indication mechanism, providing warnings from both sound and light, which is more efficient and helps the staff to find the fault in time.

[0084] Combination Figure 7 , 24An embodiment of the alarm indication unit in the third control module 2 is provided, wherein the alarm indication unit further comprises a temperature indication mechanism, wherein the temperature indication mechanism comprises a third circuit board 227, a second light emitting element 225 and a second light guide column 226, wherein the third circuit board 227 is connected to the second circuit board 22, and the second light emitting element 225 is arranged on the third circuit board 227 for indicating the temperature rise or high temperature of the connection terminal of the circuit breaker 3, and preferably, a plurality of second light emitting elements 225 and a plurality of second light guide columns 226 are respectively arranged, and the second light emitting elements 225 and the second light guide columns 226 are arranged correspondingly, and each second light emitting element 225 corresponds to displaying the temperature rise or high temperature of each connection terminal of the circuit breaker 3, and the second light guide column 226 is partially exposed on the surface of the control module 2, specifically located on the surface of the second fixing member, for displaying the state of the second light emitting element 225. The alarm indication unit of this embodiment can be used alone, or can be used in combination with any one or both of the first embodiment and the second embodiment of the alarm indication unit.

[0085] Further, when the present application is applied to a multi-pole circuit breaker 3, the alarm indication unit further includes a fault display screen 229 (see Figure 8 ), the fault display screen 229 is used in conjunction with one or more of the status indicating mechanisms and temperature indicating mechanisms in the control module 2, and can also replace the light-emitting elements and light guides in the status indicating mechanisms and temperature indicating mechanisms to directly display the fault type and location.

[0086] like Figure 8 As shown, the fault display screen 229 is arranged on the surface of the second fixing part of the control module 2, the fault display screen 229 is connected to the second circuit board 22 and controlled by the second microprocessor MCU2, when the control module 2 obtains the type and location of the fault of the circuit breaker 3 through the sampling module 1, the second microprocessor MCU2 controls the fault display screen 229 to display the fault type and location accordingly, and the fault display screen 229 is preferably a digital tube or a liquid crystal display panel. The fault display screen 229 can also be applied to a circuit breaker 3 with only two phase poles, but is particularly suitable for assembling a multi-pole circuit breaker 3, which is beneficial for the control module 2 to accurately display the fault type and location, so as to timely discover and handle the circuit breaker 3 fault.

[0087] In addition, the number of control modules 2 of the present application can be multiple, and only one functional unit can be set in each control module 2, such as setting an automatic opening and closing unit in one control module 2 and setting an alarm indication unit in another control module 2; or, the status indication mechanism, sound alarm device and temperature indication mechanism in the alarm indication unit can be dispersed in multiple control modules 2.

[0088] Preferably, the control module 2 also includes a communication unit, which is used to enable the control module 2 to communicate with a receiving device. The communication device includes another circuit breaker 3 assembled with the control module 2, an external client, a user APP, a cloud platform and equipment, etc. In addition, when there are multiple control modules 2 assembled in the same circuit breaker 3, and multiple control modules 2 are also provided with a communication unit, a communication connection can also be achieved.

[0089] Preferably, a signal transmission unit for realizing signal exchange is provided between the sampling module 1 and the control module 2, and the signal transmission unit includes a socket 221 arranged on the second circuit board 22 and a plug 121 arranged on the first circuit board 12, and the plug 121 cooperates with the socket 221 to realize signal transmission between the signal unit arranged on the first circuit board 12 and the controller arranged on the second circuit board 22.

[0090] When the first circuit board 12 of the sampling module 1 needs to be connected to multiple control modules 2 , multiple plugs 121 may be provided on the first circuit board 12 , and each plug 121 is connected to the second circuit board 22 of different control modules 2 .

[0091] Preferably, an intermediate circuit board 19 is provided between the first circuit board 12 and the second circuit board 22. Figure 17-20 As shown, the intermediate circuit board 19 is preferably disposed together with the first circuit board 12 in the first fixing member, and the corresponding first fixing member may also include an expansion shell for expansion to cover the intermediate circuit board 19. The first circuit board 12 is provided with an expansion plug 122 connected to the intermediate circuit board 19, and the intermediate circuit board 19 is provided with an intermediate plug 191 and an intermediate socket 192, wherein the intermediate socket 192 cooperates with the expansion plug 122 of the first circuit board 12, and the intermediate plug 191 cooperates with the socket 221 of the second circuit board 22. Figure 17-19 As shown, an intermediate socket 192 is provided on one side of the intermediate circuit board 19, and the intermediate socket 192 cooperates with the plug 121 on the second circuit board 22. An intermediate plug 191 is provided on the other side of the intermediate circuit board 19. Figure 18-19 In the embodiment, the intermediate circuit board 19 further includes a second extension plug 193 for cooperating with another intermediate circuit board 19, the intermediate plug 191 is connected to the socket 221 on the second circuit board 22 in the control module 2, and the second extension plug 193 is used to connect to the next intermediate circuit board 19. Such a structure is suitable for connecting multiple intermediate circuit boards 19 to be connected to multiple control modules 2 respectively. Multiple control modules 2 can be connected through multiple intermediate circuit boards 19 for signal transmission. The intermediate circuit board 19 connected to the last control module 2, such as Fig. 20As shown, an intermediate socket 192 is provided on one side of the intermediate circuit board 19, an intermediate plug 191 is provided on the other side of the intermediate circuit board 19, and no second extension plug 193 is provided.

[0092] A circuit breaker 3 includes a housing 31, wherein at least two phase poles are arranged in the housing 31, each phase pole includes wiring terminals arranged at both ends, wherein one wiring terminal is used as an incoming terminal, and the other wiring terminal is used as an outgoing terminal, and a handle, an operating mechanism 32 and a contact mechanism are arranged between the wiring terminals, wherein the handle is linked with the operating mechanism 32, and the handles and operating mechanisms 32 of adjacent phase poles are linked and connected, and the contact mechanism in each pole is opened and closed under the drive of the operating mechanism 32. Sampling modules 1 are assembled at both ends of the housing 31 where the wiring terminals are arranged, and the sampling module 1 is connected to the wiring terminals of each phase pole, and a control module 2 is assembled on one side of the housing 31, wherein a functional unit is arranged in the control module 2, and an automatic opening and closing unit in the functional unit is linked and connected with the circuit breaker 3, and specifically, the automatic opening and closing unit includes a control handle 23, a transmission mechanism 24 and a tripping mechanism 25, wherein the control handle 23 is linked and connected with the handle, and the transmission mechanism 24 and the tripping mechanism 25 are linked and connected with the operating mechanism 32 of the circuit breaker 3, respectively.

[0093] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. An accessory module for a circuit breaker, characterized in that: The invention comprises at least one control module (2) and at least one sampling module (1), wherein the control module (2) is detachably mounted on the side of a circuit breaker (3); the sampling module (1) is detachably mounted on two ends of the circuit breaker (3) provided with wiring terminals, the sampling module (1) transmits the signal collected from the circuit breaker (3) to the control module (2), the control module (2) comprises a control unit and a functional unit, the control module (2) drives the functional unit to operate according to the signal transmitted by the sampling module (1), the sampling module comprises an electronic component for collecting the main line signal of the circuit breaker (3), the electronic component comprises a current transformer (14) and / or a zero sequence transformer (15) and / or a temperature transformer (16) and / or a voltage sampling circuit.

2. The accessory module of a circuit breaker according to claim 1, characterized in that: The connection terminals of the circuit breaker (3) include an incoming terminal and an outgoing terminal. The number of the sampling modules (1) is two, and the two sampling modules (1) are respectively detachably mounted at two ends of the circuit breaker (3) provided with the incoming terminal and the outgoing terminal.

3. The accessory module of a circuit breaker according to claim 1, characterized in that: The number of the sampling modules (1) is two, one of the sampling modules (1) is provided with a current transformer (14) for collecting current signals in the main circuit of the circuit breaker (3), and the other sampling module (1) is provided with a zero-sequence transformer (15) for collecting leakage current signals in the main circuit of the circuit breaker (3).

4. The accessory module of a circuit breaker according to claim 1, characterized in that: The sampling module (1) comprises a first fixing member, a first circuit board (12) is arranged inside the first fixing member, a power board (13) is connected to the first circuit board (12), a current transformer (14) is connected to the first circuit board (12), the power board (13) is used to connect to the wiring terminal of the circuit breaker (3), the first fixing member is provided with a threading hole at the installation position corresponding to the current transformer (14), and the current transformer (14) transmits the sensed current signal to the first circuit board (12).

5. The accessory module of a circuit breaker according to claim 1, characterized in that: The sampling module (1) comprises a first fixing member, a first circuit board (12) is arranged inside the first fixing member, a power supply board (13) is connected to the first circuit board (12), a zero-sequence mutual inductor (15) is connected to the first circuit board (12), the first fixing member is provided with a threading hole at an installation position corresponding to the zero-sequence mutual inductor (15), and the zero-sequence mutual inductor (15) transmits the sensed leakage current signal to the first circuit board (12).

6. An accessory module for a circuit breaker according to claim 4 or 5, characterized in that: A temperature sensor (16) is also connected to the first circuit board (12); the temperature sensor (16) is in contact with the power board (13) to obtain the temperature of the connection terminal of the circuit breaker (3); and the temperature sensor (16) transmits the temperature signal to the first circuit board (12).

7. The accessory module of a circuit breaker according to claim 1, characterized in that: The sampling module (1) comprises a first fixing member, the first fixing member comprises a first mounting groove (171) and a second mounting groove (172), the first mounting groove (171) is used to mount a first circuit board (12), the second mounting groove (172) is used to mount a current transformer (14) or a zero-sequence transformer (15), the second mounting groove (172) is located below the first mounting groove (171), and a threading hole for allowing a wire to pass through is provided inside the second mounting groove (172).

8. The accessory module of a circuit breaker according to claim 7, characterized in that: A separation protrusion (173) is provided inside the second installation groove (172), and the separation protrusion (173) separates the second installation groove (172) into at least two second sub-installation grooves (174), and each second sub-installation groove (174) is correspondingly provided with a threading hole.

9. The accessory module of a circuit breaker according to claim 8, characterized in that: The second installation groove (172) is in a capsule shape, and the side wall of the separation protrusion (173) is an arc-shaped concave surface, and the separation protrusion (173) is used to separate and form a circular second sub-installation groove (174).

10. The accessory module of a circuit breaker according to claim 7, characterized in that: The first circuit board (12) is installed in the first installation groove (171); the first circuit board (12) is provided with a power supply board (13) and a plug (121) for connecting to the control module (2) on the front side facing the circuit breaker; a temperature sensor (16) is provided on the back side of the first circuit board (12); the power supply board (13) passes through the first circuit board (12), one end of which is used to be connected to the wiring terminal of the circuit breaker, and the other end of which is in contact with the temperature sensor (16).

11. An accessory module for a circuit breaker according to claim 2 or 3, characterized in that: The two sampling modules (1) are respectively connected to the incoming terminal and the outgoing terminal of the circuit breaker (3), wherein the sampling module (1) connected to the incoming terminal is connected to the incoming terminal to provide working power for the entire accessory module.

12. The accessory module of a circuit breaker according to claim 1, characterized in that: The sampling module (1) comprises an electronic component for collecting a main line signal of a circuit breaker (3) and a first microprocessor, wherein the electronic component is connected to the first microprocessor.

13. An accessory module for a circuit breaker according to claim 1 or 3, characterized in that: The functional unit includes an automatic opening and closing unit and / or an alarm indication unit and / or a release unit.

14. An accessory module for a circuit breaker according to claim 13, characterized in that: The control module (2) also includes a communication unit, which is connected to the control unit.

15. An accessory module for a circuit breaker according to claim 1 or 3, characterized in that: The number of the control modules (2) is at least two, wherein the functional unit of one control module (2) comprises an automatic opening and closing unit, and the functional unit of the other control module (2) comprises an alarm indication unit and / or a release unit.

16. The accessory module of a circuit breaker according to claim 1, characterized in that: The control module (2) comprises a second fixing member, the second fixing member comprising a base (211) and an upper cover (212), the base (211) being provided with a hook (2111) assembled on the circuit breaker (3), and the housing (31) of the circuit breaker (3) being provided with a groove (312) matching with the hook (2111).

17. The accessory module of a circuit breaker according to claim 1, characterized in that: The control module (2) comprises a second circuit board (22) and an automatic opening and closing unit, wherein the automatic opening and closing mechanism comprises a control handle (23), a transmission mechanism (24) and a tripping structure, wherein the control handle (23) is linked to a handle of a circuit breaker (3), the control handle (23) is linked to the transmission mechanism (24), and the tripping structure is linked to an operating mechanism of the circuit breaker (3). A controller is provided on the second circuit board (22), wherein the controller can control the transmission mechanism (24) to drive the control handle (23) to drive the handle of the circuit breaker (3) to achieve a closing operation of the circuit breaker according to a signal from the sampling module (1), and the controller can control the transmission mechanism (24) to drive the tripping structure to trigger the operating mechanism of the circuit breaker (3) to trip to achieve an opening operation of the circuit breaker.

18. An accessory module for a circuit breaker according to claim 1 or 3, characterized in that: The control module (2) comprises a second circuit board (22) and a trip unit, the trip unit comprising a trip (251), and a controller is provided on the second circuit board (22), the controller being capable of controlling the trip (251) to trigger the operating mechanism of the circuit breaker (3) to trip according to a signal from the sampling module (1).

19. An accessory module for a circuit breaker according to claim 18, characterized in that: The control module (2) is also provided with a test button (26) and a test circuit, and the test circuit is operated by the test button (26) to generate a simulated leakage current.

20. The accessory module of a circuit breaker according to claim 1, characterized in that: The sampling module (1) comprises a first circuit board (12), on which a signal unit is provided, and the control module (2) comprises a second circuit board (22), on which a controller is provided; the sampling module (1) and the control module (2) transmit signals via a signal transmission unit, the signal transmission unit comprising a plug (121) arranged on the first circuit board (12) and a socket (221) arranged on the second circuit board (22); the plug (121) and the socket (221) cooperate to realize signal transmission between the signal unit and the controller.

21. An accessory module for a circuit breaker according to claim 20, characterized in that: The number of the control modules (2) is multiple, and the multiple control modules (3) are arranged side by side on the same side of the circuit breaker (3). The signal transmission unit also includes an intermediate circuit board (19). The first circuit board (12) is provided with an extension plug (122) connected to the intermediate circuit board (19). The intermediate circuit board (19) is provided with an intermediate plug (191) and an intermediate socket (192). The intermediate socket (192) cooperates with the extension plug (122) of the first circuit board (12), and the intermediate plug (191) cooperates with the socket (221) of the second circuit board (22).

22. An accessory module for a circuit breaker according to claim 21, characterized in that: The intermediate circuit board (19) also includes a second expansion plug (193) for mating with another intermediate circuit board (19).

23. A circuit breaker, characterized in that: An accessory module of a circuit breaker according to any one of claims 1 to 22 is installed.

24. A circuit breaker, comprising a housing (31), wherein at least two phase poles are arranged in the housing (31), each phase pole comprising connection terminals arranged at two ends, characterized in that: The housing (31) is assembled with an accessory module as claimed in any one of claims 1 to 22, and the sampling module (1) is connected to the connection terminal of each phase pole of the circuit breaker (3).

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