Multi-protection intelligent circuit breaker

Abstract

The invention relates to the technical field of electric power supplies, in particular to a multi-protection intelligent circuit breaker, which comprises a connecting unit, a shell, wiring terminals arranged on the inner walls of the upper side and the lower side of the shell, and monitoring assemblies arranged on the sides, away from the shell, of the two groups of wiring terminals respectively; the tripping unit comprises a reset switch arranged on the inner wall of the front side of the shell, a closing assembly arranged on the outer side of the reset switch and a reset assembly arranged on the inner wall of the right side of the shell; the monitoring assembly is used for monitoring current and voltage data in the intelligent circuit breaker; the reset switch is used for manually operating the reset of the circuit breaker; and the closing assembly is used for controlling the opening and closing of a circuit of the circuit breaker. The beneficial effects of the invention are that accurate monitoring data are provided for multiple protection of the circuit breaker through the monitoring assembly, and the circuit break response time and different reset operation modes can be realized and enhanced through the lock catch unit, so that the circuit breaker is more intelligent and convenient to operate.

Description

Technical Field

[0001] The invention relates to the technical field of electric power supplies, in particular to a multi-protection intelligent circuit breaker. Background Art

[0002] A circuit breaker refers to a switching device that can close, carry and disconnect current under normal circuit conditions and can close, carry and disconnect current under abnormal circuit conditions within a specified time. An intelligent circuit breaker is a type of circuit breaker. The intelligent circuit breaker in the prior art collects current through a current transformer, receives the current signal collected by the current transformer through a microprocessor, compares the collected current signal with the set value, and then issues a command to activate the electronic release to drive the mechanism to trip, so as to achieve multiple protections such as overload, over-voltage and under-voltage of the intelligent circuit breaker, among which overload is especially achieved by electronic overload protection.

[0003] The intelligent circuit breaker in the prior art is basically a traditional circuit breaker with an intelligent electronic control structure added, and the traditional thermal bimetallic strip tripping mechanism requires a larger operating space to ensure the normal deformation and tripping of the bimetallic strip, which will result in no additional space in the small intelligent circuit breaker to integrate and install the required intelligent modules such as the intelligent module and the signal module. Therefore, the existing solution is usually to add an external intelligent module to the traditional circuit breaker and connect it through a data cable. Although this can realize the intelligent control protection of the circuit breaker, it will also increase the size of the combined circuit breaker, which greatly weakens the use advantage of the small circuit breaker. Summary of the invention

[0004] In view of the above problems or problems existing in the prior art, the present invention is proposed.

[0005] Therefore, the object of the present invention is to provide a multi-protection intelligent circuit breaker, which can realize the multiple protection of the circuit breaker by designing a tripping mechanism matched with the intelligent module, and leave enough margin space inside the circuit breaker for integrated installation of the intelligent module.

[0006] To solve the above technical problems, the present invention provides the following technical solutions: A multi-protection intelligent circuit breaker, comprising a connection unit, including a housing, wiring terminals arranged on the inner walls of the upper and lower sides of the housing, and monitoring components respectively arranged inside two groups of the wiring terminals;

[0007] A trip unit, comprising a reset switch disposed on the inner wall of the front side of the housing, a closing component disposed on the outer side of the reset switch, and a reset component disposed on the inner wall of the right side of the housing;

[0008] The monitoring component is used to monitor the current and voltage data in the intelligent circuit breaker; the reset switch is used to reset the manually operated circuit breaker; the closing component is used to control the circuit opening and closing of the circuit breaker; and the reset component is used to reset the electrically controlled circuit breaker.

[0009] As a preferred solution of the multi-protection intelligent circuit breaker described in the present invention, the shell includes a through opening opened on the right inner wall, a quick-release battery arranged on the inner wall of the through opening, and a controller arranged on the inner wall of the shell.

[0010] As a preferred solution of the multi-protection intelligent circuit breaker of the present invention, the two groups of monitoring components include conductive sheets respectively fixed to the inner walls of the two groups of wiring terminals, intelligent modules respectively arranged on the outer sides of the two groups of conductive sheets for monitoring current and voltage, and static contacts respectively arranged on the right sides of the two groups of conductive sheets;

[0011] The outer sides of the two groups of static contacts are both provided with vacuum arc extinguishing boxes.

[0012] As a preferred solution of the multi-protection intelligent circuit breaker of the present invention, wherein:

[0013] The reset switch comprises a through hole formed on the inner wall of the front side of the housing, and the reset switch is slidably disposed inside the through hole;

[0014] The cross-sectional shape of the reset switch is set to be T-shaped to limit the movable stroke of the reset switch inside the through hole.

[0015] As a preferred solution of the multi-protection intelligent circuit breaker of the present invention, wherein:

[0016] The closing component includes a reset push rod arranged on the outside of the reset switch, a relay plate arranged on the end of the reset push rod away from the reset switch, two groups of moving contacts arranged on the outside of the relay plate, the two groups of moving contacts respectively corresponding to the positions of the two static contacts and respectively located inside the two groups of vacuum arc extinguishing boxes, and a magnetic attraction member arranged on the side of the relay plate away from the reset push rod.

[0017] As a preferred solution of the multi-protection intelligent circuit breaker of the present invention, wherein:

[0018] The magnetic attraction member includes an insulating rod arranged on a side of the relay sheet away from the reset push rod, a magnetic attraction head arranged on an end of the insulating rod away from the relay sheet, and a small electromagnet arranged on the inner wall of the rear side of the housing to control the closing of the circuit breaker through electromagnetic attraction;

[0019] The magnetic attraction component also includes a fixing ring arranged on the outside of the insulating rod, and a first spring arranged on the back of the fixing ring for pushing the moving contact to separate and disconnect from the static contact, and one end of the first spring away from the fixing ring is fixedly connected to the front end surface of the small electromagnet.

[0020] As a preferred solution of the multi-protection intelligent circuit breaker described in the present invention, the reset component includes a motor arranged on the right inner wall of the shell, a cam arranged at the output end of the motor, and a pressing piece arranged on the right inner wall of the shell and located in front of the cam.

[0021] As a preferred solution of the multi-protection intelligent circuit breaker of the present invention, wherein:

[0022] The pressing member includes a support rod disposed on the right inner wall of the housing, a paddle rotatably disposed on the outside of the support rod and located in front of the cam, and a push plate disposed inside the paddle for pressing down and pushing the relay plate to close and reset under the drive of the cam;

[0023] The pressing member further comprises a second spring arranged outside the paddle, and one end of the second spring away from the paddle is fixed to the inner wall of the housing to control the paddle to return to the starting position.

[0024] As a preferred solution of the multi-protection intelligent circuit breaker of the present invention, the outer side of the push plate is provided with a placement opening for the push plate to be sleeved and arranged on the outer side of the reset push rod.

[0025] As a preferred solution of the multi-protection intelligent circuit breaker of the present invention, the shape of the paddle is set to be an inclined L-shape, and the second spring is arranged parallel to the paddle.

[0026] Beneficial effects of the present invention: The present invention monitors the current and voltage passing through the circuit breaker through the intelligent module in the monitoring component to achieve the effect of multiple protections and use the controller to centrally control all components in the circuit breaker. When the current and voltage are abnormal, the power supply of the small electromagnet is cut off, so that the magnetic suction head loses magnetic attraction and the moving contact and the static contact are quickly separated under the drive of the first spring to achieve power off. Its fast response can synchronously disconnect the contacts at the moment of electromagnetic disconnection. At the same time, the circuit closure and reset operation of the circuit breaker can be achieved by manual pressing and resetting the component in the present invention to meet different needs in use. The improved locking unit structure is more centralized, and sufficient margin can be reserved on the basis of the traditional shell space to facilitate the integration and installation of the intelligent and control modules into the shell, so as to meet higher multiple intelligent protection without reducing the use advantages of the small circuit breaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. Among them:

[0028] Figure 1 This is the overall structure diagram of the multi-protection intelligent circuit breaker.

[0029] Figure 2 This is the shell structure diagram of the multi-protection intelligent circuit breaker.

[0030] Figure 3 It is a three-dimensional cross-sectional view of a multi-protection intelligent circuit breaker.

[0031] Figure 4 This is a front view of the overall structure of the multi-protection intelligent circuit breaker.

[0032] Figure 5 It is a plan cross-sectional view of a multi-protection intelligent circuit breaker.

[0033] Figure 6 This is the structural diagram of the locking unit of the multi-protection intelligent circuit breaker.

[0034] Figure 7 This is an exploded view of the locking unit of a multi-protection intelligent circuit breaker.

[0035] Figure 8 It is a three-dimensional cross-sectional view of the locking unit of a multi-protection intelligent circuit breaker.

[0036] Fig. 9 This is a front view of the locking unit of the multi-protection intelligent circuit breaker.

[0037] Fig.10 This is the paddle structure diagram of the multi-protection intelligent circuit breaker. DETAILED DESCRIPTION

[0038] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0039] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0040] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0041] Example 1

[0042] Reference Figure 1 to Figure 4 , is the first embodiment of the present invention, which provides a multi-protection intelligent circuit breaker, which can integrate a locking structure and an intelligent protection structure into the circuit breaker body to achieve multiple intelligent protections for the circuit breaker while reducing the installation space requirement, including a connection unit 100, including a shell 101, wiring terminals 102 arranged on the inner walls of the upper and lower sides of the shell 101, and monitoring components 103 respectively arranged inside the two groups of wiring terminals 102.

[0043] Furthermore, the trip unit 200 includes a reset switch 201 disposed on the front inner wall of the housing 101 , a closing component 202 disposed on the outer side of the reset switch 201 , and a reset component 203 disposed on the right inner wall of the housing 101 .

[0044] Furthermore, the monitoring component 103 is used to monitor the current and voltage data in the intelligent circuit breaker; the reset switch 201 is used to manually reset the circuit breaker; the closing component 202 is used to control the circuit opening and closing of the circuit breaker; and the reset component 203 is used to reset the electronically controlled circuit breaker.

[0045] It should be noted that the connection terminal 102 is a power import and export interface of the circuit breaker, which is used to connect the power supply, load and control signal, etc. The housing 101 also includes a detachable side cover for internal structure installation and maintenance.

[0046] When in use, the power cord is connected to the two groups of terminal blocks 102 respectively to connect the power supply, and the monitoring component 103 is connected to the terminal blocks 102. When the power is turned on, the monitoring component 103 can be used to monitor the current and voltage flowing through the circuit breaker for multiple protection monitoring such as overload, overvoltage and leakage, and cut off the circuit in time to achieve protection when the current and voltage are abnormal. When the circuit breaker is in use, the position of the contact is limited by the closing component 202 to achieve the closure of the circuit. Secondly, the reset switch 201 can be used to manually reset the circuit breaker when it returns to normal, or the reset component 203 can be operated by remote control to reset and close the circuit by electrical control.

[0047] In summary, through the integrated intelligent circuit breaker, the monitoring component 103 monitors various data during use, which can provide accurate monitoring data for the multiple protections of the circuit breaker. In addition, through the coordinated use of the reset switch 201, the closing component 202 and the reset component 203 in the locking unit 200, the basic opening and closing functions of the circuit breaker can be realized, and on this basis, the circuit breaking response time and different reset operation modes are enhanced, making the circuit breaker more intelligent and easy to operate.

[0048] Example 2

[0049] Reference Figure 1 to Figure 6 , which is the second embodiment of the present invention, and is different from the first embodiment in that: it also includes. In the previous embodiment, the multi-protection intelligent circuit breaker includes a housing 101 including a through hole 101a opened on the right inner wall, a quick-release battery 101b arranged on the inner wall of the through hole 101a, and a controller 101c arranged on the inner wall of the housing 101.

[0050] Specifically, the controller 101c includes a microprocessor, which is the core of the intelligent circuit breaker and is responsible for receiving sensor signals, performing data processing and logic judgment, and controlling the switching action of the circuit breaker, as well as a memory for storing program codes, historical data, and configuration information.

[0051] It should be noted that the quick-release battery 101b is a quickly detachable and installed battery pack. When installed in the intelligent circuit breaker, it can be charged when powered on and provide power for the internal structure to operate when powered off. The controller 101c can control the electrical components inside the circuit breaker.

[0052] Furthermore, the two groups of monitoring components 103 include conductive sheets 103a fixed to the inner walls of the two groups of terminal blocks 102, smart modules 103b respectively arranged on the outside of the two groups of conductive sheets 103a for monitoring current and voltage, and static contacts 103c respectively arranged on the right sides of the two groups of conductive sheets 103a.

[0053] Furthermore, the outer sides of the two groups of static contacts 103c are both set with a vacuum arc extinguishing box 103c-1. It should be noted that the interior of the vacuum arc extinguishing box 103c-1 is a vacuum cavity, and openings for inserting the conductive sheet 103a and the relay sheet 202b are respectively opened on the outer side of the vacuum arc extinguishing box 103c-1, and sealing materials are arranged between the openings and the conductive sheet 103a and the relay sheet 202b to ensure that the vacuum arc extinguishing box 103c-1 is in a good vacuum state, and the air conductor is reduced by the vacuum cavity to effectively reduce the arc generation when the moving contact 202c is separated from the static contact 103c.

[0054] Furthermore, the closing component 202 includes a reset push rod 202a arranged on the outside of the reset switch 201, a relay plate 202b arranged on the end of the reset push rod 202a away from the reset switch 201, two groups of moving contacts 202c arranged on the outside of the relay plate 202b, the two groups of moving contacts 202c respectively correspond to the positions of the two static contacts 103c and are respectively located inside the two groups of vacuum arc extinguishing boxes 103c-1, and a magnetic attraction part 202d arranged on the side of the relay plate 202b away from the reset push rod 202a.

[0055] Furthermore, the magnetic attraction component 202d includes an insulating rod 202d-1 arranged on the side of the relay piece 202b away from the reset push rod 202a, a magnetic attraction head 202d-2 arranged on the end of the insulating rod 202d-1 away from the relay piece 202b, and a small electromagnet 202d-3 arranged on the inner wall of the rear side of the shell 101 to control the closing of the circuit breaker through electromagnetic attraction.

[0056] It should be noted that the small electromagnet 202d-3 is powered by the quick-release battery 101b and controlled by the controller 101c. When the circuit breaker is in a normal state, the controller 101c controls the small electromagnet 202d-3 to be energized, allowing the small electromagnet 202d-3 to generate electromagnetic force, thereby attracting the magnetic suction head 202d-2 to limit its position so that the moving contact 202c and the static contact 103c are in contact to achieve power-on. When the circuit needs to be disconnected, the controller 101c controls the small electromagnet 202d-3 to be de-energized. The small electromagnet 202d-3 has no power supply, and thus cannot generate electromagnetic force to allow the magnetic suction head 202d-2 to return to its position to perform the circuit breaking operation.

[0057] Furthermore, the magnetic attraction component 202d also includes a fixing ring 202d-4 arranged on the outside of the insulating rod 202d-1, and a first spring 202d-5 arranged on the back side of the fixing ring 202d-4 for pushing the moving contact 202c to separate and disconnect from the static contact 103c, and one end of the first spring 202d-5 away from the fixing ring 202d-4 is fixedly connected to the front end face of the small electromagnet 202d-3.

[0058] Furthermore, the reset assembly 203 includes a motor 203a arranged on the right inner wall of the shell 101, a cam 203b arranged at the output end of the motor 203a, and a pressing piece 203c arranged on the right inner wall of the shell 101 and located in front of the cam 203b. It should be noted that the motor 203a adopts a micro motor, which is powered by a quick-release battery 101b and controlled by a controller 101c.

[0059] It should be noted that the smart module 103 includes multiple groups of sensors integrated together, including a current sensor for detecting the current in the circuit to determine whether there is an overload or short circuit; a voltage sensor for monitoring the voltage level of the circuit to ensure that the voltage is within a normal range; a temperature sensor for detecting the temperature of the circuit breaker or the circuit to prevent failures caused by overheating; a leakage sensor for detecting leakage in the circuit and providing leakage protection function. In addition to the above sensors, the smart module 103 also includes a wireless communication module, such as Wi-Fi, Zigbee, LoRa, etc., which is used to realize wireless connection between the circuit breaker and external devices or networks, and support remote control and data transmission.

[0060] When in use, the small electromagnet 202d-3 is powered by the quick-release battery 101b and controlled by the controller 101c. When the circuit breaker is in a normal state, the controller 101c controls the small electromagnet 202d-3 to be energized, so that the small electromagnet 202d-3 generates electromagnetic force, thereby being able to attract the magnetic suction head 202d-2 that moves down into the small electromagnet 202d-3 by pressing the reset switch 201 or the reset component 203. In this process, the fixing ring 202d-4 will move accordingly and compress the first spring 202d -5, by limiting its position, the moving contact 202c and the static contact 103c are in contact to realize power-on. When the circuit needs to be disconnected, the controller 101c controls the small electromagnet 202d-3 to be powered off. The small electromagnet 202d-3 has no power supply, and thus cannot generate electromagnetic force to separate the magnetic suction head 202d-2 from it. After losing the electromagnetic traction, the first spring 202d-5 rebounds and drives the fixing ring 202d-4 and the magnetic suction head 202d-2 to move up quickly, so that the moving contact 202c and the static contact 103c are separated to realize circuit disconnection;

[0061] Furthermore, in the reset operation of the circuit breaker, when the circuit breaker returns to normal, the small electromagnet 202d-3 will re-supply power to generate electromagnetic attraction, press the reset switch 201 to push the reset push rod 202a and the relay 202b to move, so that the moving contact 202c is in contact with the static contact 103c. At the same time, the movement of the relay 202b drives the insulating rod 202d-1 and the magnetic suction head 202d-2 to move synchronously. After the magnetic suction head 202d-2 moves into the small electromagnet 202d-3, it will be pulled by the electromagnetic attraction to perform a magnetic suction operation to limit the position of the magnetic suction head 202d-2, so that the terminal A connected circuit is formed between the sub-102 and the conductive sheet 103a and the relay sheet 202b. The above is a manual reset operation, wherein the motor 203a is started by the remote operation controller 101c, and the cam 203b is driven to rotate by the motor 203a. When the cam 203b rotates, its protruding outer circle part will contact the paddle 203c-2, allowing the paddle 203c-2 to rotate along the support rod 203c-1, and one end of the paddle moves up to compress the second spring 203c-4, and the other end moves down to cooperate with the push plate 203c-3 to push the relay sheet 202b down to complete the magnetic attraction operation, thereby realizing the electric control reset operation.

[0062] In summary, the quick-release battery 101b and the controller 101c can provide additional power and overall control for the circuit breaker. The small electromagnet 202d-3 is used as a fixed structure in the closing component 202. The circuit of the circuit breaker can be opened and closed by simply controlling the electromagnetic force. Compared with traditional circuit breakers, it uses fewer structures and is convenient for the implantation of intelligent components. The reset component 203 provides two reset methods: manual and electric control, so that the appropriate reset method can be selected in different environments.

[0063] Example 3

[0064] Reference Figures 1 to 10 , which is the third embodiment of the present invention, and this embodiment provides a multi-protection intelligent circuit breaker, which can improve the multi-intelligent protection effect of the circuit breaker, including a connection unit 100, including a shell 101, wiring terminals 102 arranged on the inner walls of the upper and lower sides of the shell 101, and monitoring components 103 respectively arranged inside the two groups of wiring terminals 102.

[0065] Furthermore, the trip unit 200 includes a reset switch 201 disposed on the front inner wall of the housing 101 , a closing component 202 disposed on the outer side of the reset switch 201 , and a reset component 203 disposed on the right inner wall of the housing 101 .

[0066] Furthermore, the monitoring component 103 is used to monitor the current and voltage data in the intelligent circuit breaker; the reset switch 201 is used to manually reset the circuit breaker; the closing component 202 is used to control the circuit opening and closing of the circuit breaker; and the reset component 203 is used to reset the electronically controlled circuit breaker.

[0067] Furthermore, the housing 101 includes a through opening 101 a opened on the right inner wall, a quick-release battery 101 b disposed on the inner wall of the through opening 101 a , and a controller 101 c disposed on the inner wall of the housing 101 .

[0068] It should be noted that the connection terminal 102 is a power import and export interface of the circuit breaker, which is used to connect the power supply, load and control signal, etc. The housing 101 also includes a detachable side cover for internal structure installation and maintenance.

[0069] Specifically, the controller 101c includes a microprocessor which may be a single chip microcomputer or other device, which is the core of the intelligent circuit breaker and is responsible for receiving sensor signals, performing data processing and logic judgment, and controlling the switching action of the circuit breaker, as well as a memory for storing program code, historical data, configuration information, etc.

[0070] It should be noted that the quick-release battery 101b is a quickly detachable and installed battery pack. When installed in the intelligent circuit breaker, it can be charged when powered on and provide power for the internal structure to operate when powered off. The controller 101c can control the electrical components inside the circuit breaker.

[0071] Furthermore, the two groups of monitoring components 103 include conductive sheets 103a fixed to the inner walls of the two groups of terminal blocks 102, smart modules 103b respectively arranged on the outside of the two groups of conductive sheets 103a for monitoring current and voltage, and static contacts 103c respectively arranged on the right sides of the two groups of conductive sheets 103a.

[0072] Furthermore, the outer sides of the two groups of static contacts 103c are both set with a vacuum arc extinguishing box 103c-1. It should be noted that the interior of the vacuum arc extinguishing box 103c-1 is a vacuum cavity, and openings for inserting the conductive sheet 103a and the relay sheet 202b are respectively opened on the outer side of the vacuum arc extinguishing box 103c-1, and sealing materials are arranged between the openings and the conductive sheet 103a and the relay sheet 202b to ensure that the vacuum arc extinguishing box 103c-1 is in a good vacuum state, and the air conductor is reduced by the vacuum cavity to effectively reduce the arc generation when the moving contact 202c is separated from the static contact 103c.

[0073] Furthermore, the reset switch 201 includes a through hole 201 a opened on the front inner wall of the housing 101 , and the reset switch 201 is slidably disposed inside the through hole 201 a .

[0074] Furthermore, the cross-sectional shape of the reset switch 201 is set to be T-shaped to limit the movable travel of the reset switch 201 inside the through hole 201a.

[0075] Furthermore, the closing component 202 includes a reset push rod 202a arranged on the outside of the reset switch 201, a relay plate 202b arranged on the end of the reset push rod 202a away from the reset switch 201, two groups of moving contacts 202c arranged on the outside of the relay plate 202b, the two groups of moving contacts 202c respectively correspond to the positions of the two static contacts 103c and are respectively located inside the two groups of vacuum arc extinguishing boxes 103c-1, and a magnetic attraction part 202d arranged on the side of the relay plate 202b away from the reset push rod 202a.

[0076] Furthermore, the magnetic attraction component 202d includes an insulating rod 202d-1 arranged on the side of the relay piece 202b away from the reset push rod 202a, a magnetic attraction head 202d-2 arranged on the end of the insulating rod 202d-1 away from the relay piece 202b, and a small electromagnet 202d-3 arranged on the inner wall of the rear side of the shell 101 to control the closing of the circuit breaker through electromagnetic attraction.

[0077] It should be noted that the small electromagnet 202d-3 is powered by the quick-release battery 101b and controlled by the controller 101c. When the circuit breaker is in a normal state, the controller 101c controls the small electromagnet 202d-3 to be energized, allowing the small electromagnet 202d-3 to generate electromagnetic force, thereby attracting the magnetic suction head 202d-2 to limit its position so that the moving contact 202c and the static contact 103c are in contact to achieve power-on. When the circuit needs to be disconnected, the controller 101c controls the small electromagnet 202d-3 to be de-energized. The small electromagnet 202d-3 has no power supply, and thus cannot generate electromagnetic force to allow the magnetic suction head 202d-2 to return to its position to perform the circuit breaking operation.

[0078] Furthermore, the magnetic attraction component 202d also includes a fixing ring 202d-4 arranged on the outside of the insulating rod 202d-1, and a first spring 202d-5 arranged on the back side of the fixing ring 202d-4 for pushing the moving contact 202c to separate and disconnect from the static contact 103c, and one end of the first spring 202d-5 away from the fixing ring 202d-4 is fixedly connected to the front end face of the small electromagnet 202d-3.

[0079] Furthermore, the reset assembly 203 includes a motor 203a arranged on the right inner wall of the shell 101, a cam 203b arranged at the output end of the motor 203a, and a pressing piece 203c arranged on the right inner wall of the shell 101 and located in front of the cam 203b. It should be noted that the motor 203a adopts a micro motor, which is powered by a quick-release battery 101b and controlled by a controller 101c.

[0080] It should be noted that the smart module 103 includes multiple groups of sensors integrated together, including a current sensor for detecting the current in the circuit to determine whether there is an overload or short circuit; a voltage sensor for monitoring the voltage level of the circuit to ensure that the voltage is within a normal range; a temperature sensor for detecting the temperature of the circuit breaker or the circuit to prevent failures caused by overheating; a leakage sensor for detecting leakage in the circuit and providing leakage protection function. In addition to the above sensors, the smart module 103 also includes a wireless communication module, such as Wi-Fi, Zigbee, LoRa, etc., which is used to realize wireless connection between the circuit breaker and external devices or networks, and support remote control and data transmission.

[0081] Furthermore, the pressing member 203c includes a support rod 203c-1 arranged on the right inner wall of the shell 101, a paddle 203c-2 rotatably arranged on the outside of the support rod 203c-1 and located in front of the cam 203b, and a push plate 203c-3 arranged inside the paddle 203c-2 for pressing down and pushing the relay plate 202b to close and reset under the drive of the cam 203b.

[0082] Furthermore, the pressing member 203c also includes a second spring 203c-4 disposed outside the paddle 203c-2, and one end of the second spring 203c-4 away from the paddle 203c-2 is fixed to the inner wall of the shell 101 to control the paddle 203c-2 to return to the starting position.

[0083] Furthermore, a placement opening is provided on the outer side of the push plate 203c-3 for the push plate 203c-3 to be mounted on the outer side of the reset push rod 202a.

[0084] Furthermore, the shape of the paddle 203c - 2 is set to be an inclined L-shape, and the second spring 203c - 4 is arranged parallel to the paddle 203c - 2.

[0085] When in use, the power cord is connected to the two groups of terminal blocks 102 respectively to connect the power supply, and the monitoring component 103 is connected to the terminal blocks 102. When the power is turned on, the monitoring component 103 can be used to monitor the current and voltage flowing through the circuit breaker for multiple protection monitoring such as overload, overvoltage and leakage, and the circuit is cut off in time to achieve protection when the current and voltage are abnormal. The small electromagnet 202d-3 is powered by the quick-release battery 101b and controlled by the controller 101c. When the circuit breaker is in a normal state, the controller 101c controls the small electromagnet 202d-3 to be energized, so that the small electromagnet 202d-3 generates electromagnetic force, so that it can be attracted by pressing the reset switch 201 or the reset component. 203 is operated to move down to the magnetic suction head 202d-2 in the small electromagnet 202d-3. During this process, the fixed ring 202d-4 will move accordingly and compress the first spring 202d-5, and by limiting its position, the moving contact 202c and the static contact 103c are in contact to achieve power-on. When the circuit needs to be disconnected, the controller 101c controls the small electromagnet 202d-3 to be powered off. The small electromagnet 202d-3 has no power supply, and thus cannot generate electromagnetic force to separate the magnetic suction head 202d-2 from it. After losing electromagnetic traction, the first spring 202d-5 rebounds and drives the fixed ring 202d-4 and the magnetic suction head 202d-2 to move up quickly, so that the moving contact 202c is separated from the static contact 103c to achieve circuit disconnection.

[0086] Furthermore, in the reset operation of the circuit breaker, when the circuit breaker returns to normal, the small electromagnet 202d-3 will re-supply power to generate electromagnetic attraction, press the reset switch 201 to push the reset push rod 202a and the relay 202b to move, so that the moving contact 202c is in contact with the static contact 103c. At the same time, the movement of the relay 202b drives the insulating rod 202d-1 and the magnetic suction head 202d-2 to move synchronously. After the magnetic suction head 202d-2 moves into the small electromagnet 202d-3, it will be pulled by the electromagnetic attraction to perform a magnetic suction operation to limit the position of the magnetic suction head 202d-2, so that the terminal A connected circuit is formed between the sub-102 and the conductive sheet 103a and the relay sheet 202b. The above is a manual reset operation, wherein the motor 203a is started by the remote operation controller 101c, and the cam 203b is driven to rotate by the motor 203a. When the cam 203b rotates, its protruding outer circle part will contact the paddle 203c-2, allowing the paddle 203c-2 to rotate along the support rod 203c-1, and one end of the paddle moves up to compress the second spring 203c-4, and the other end moves down to cooperate with the push plate 203c-3 to push the relay sheet 202b down to complete the magnetic attraction operation, thereby realizing the electric control reset operation.

[0087] In summary, the current and voltage passing through the circuit breaker are monitored by the intelligent module 103b in the monitoring component 103 to achieve the effect of multiple protections and the controller 101c is used to centrally control all components in the circuit breaker. The quick-release battery 101b and the controller 101c can provide additional power and overall control to the circuit breaker. The small electromagnet 202d-3 is used as a fixed structure in the closing component 202. The circuit opening and closing of the circuit breaker can be achieved by simply controlling the electromagnetic force. When the current and voltage are abnormal, the small electromagnet is cut off. The power supply of the magnet 202d-3 causes the magnetic head 202d-2 to lose its magnetic attraction and, driven by the first spring 202d-5, quickly separates the moving contact 202c from the static contact 103c to cut off the power. Its fast response can synchronously disconnect the contacts at the moment of electromagnetic disconnection. The improved trip unit 200 has a more centralized structure and can leave enough margin on the basis of the traditional circuit breaker space to facilitate the integrated installation of the intelligent and control modules into the housing 101, thereby meeting higher multiple intelligent protection without reducing the use advantages of the small circuit breaker.

[0088] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A multi-protection intelligent circuit breaker, characterized in that: include, A connection unit (100) comprises a housing (101), connection terminals (102) arranged on the inner walls of the upper and lower sides of the housing (101), and monitoring components (103) respectively arranged inside two groups of the connection terminals (102); A trip unit (200) comprising a reset switch (201) arranged on the front inner wall of the housing (101), a closing component (202) arranged on the outside of the reset switch (201), and a reset component (203) arranged on the right inner wall of the housing (101); The monitoring component (103) is used to monitor the current and voltage data in the intelligent circuit breaker; the reset switch (201) is used to manually reset the circuit breaker; the closing component (202) is used to control the opening and closing of the circuit of the circuit breaker; and the reset component (203) is used to reset the electronically controlled circuit breaker.

2. The multi-protection intelligent circuit breaker according to claim 1, characterized in that: The housing (101) comprises a through opening (101a) opened on the right inner wall, a quick-release battery (101b) arranged on the inner wall of the through opening (101a), and a controller (101c) arranged on the inner wall of the housing (101).

3. The multi-protection intelligent circuit breaker according to claim 2, characterized in that: The monitoring component (103) comprises conductive sheets (103a) respectively arranged inside the two groups of wiring terminals (102), smart modules (103b) respectively arranged outside the two groups of conductive sheets (103a) for monitoring current and voltage, and static contacts (103c) respectively arranged on the right sides of the two groups of conductive sheets (103a); The outer sides of the two groups of static contacts (103c) are both provided with vacuum arc extinguishing boxes (103c-1).

4. The multi-protection intelligent circuit breaker according to claim 3, characterized in that: The reset switch (201) comprises a through hole (201a) opened on the inner wall of the front side of the housing (101), and the reset switch (201) is slidably arranged inside the through hole (201a); The cross-sectional shape of the reset switch (201) is set to be T-shaped, so as to limit the movable stroke of the reset switch (201) inside the through hole (201a).

5. The multi-protection intelligent circuit breaker according to claim 4, characterized in that: The closing component (202) comprises a reset push rod (202a) arranged on the outside of the reset switch (201), a relay plate (202b) arranged on the end of the reset push rod (202a) away from the reset switch (201), two groups of moving contacts (202c) arranged on the outside of the relay plate (202b), the two groups of moving contacts (202c) respectively corresponding to the positions of the two static contacts (103c) and respectively located inside the two groups of vacuum arc extinguishing boxes (103c-1), and a magnetic attraction member (202d) arranged on the side of the relay plate (202b) away from the reset push rod (202a).

6. The multi-protection intelligent circuit breaker according to claim 5, characterized in that: The magnetic attraction member (202d) comprises an insulating rod (202d-1) arranged on a side of the relay sheet (202b) away from the reset push rod (202a), a magnetic attraction head (202d-2) arranged on an end of the insulating rod (202d-1) away from the relay sheet (202b), and a small electromagnet (202d-3) arranged on the inner wall of the rear side of the housing (101) to control the closing of the circuit breaker through electromagnetic attraction; The magnetic attraction member (202d) also includes a fixing ring (202d-4) arranged on the outside of the insulating rod (202d-1), and a first spring (202d-5) arranged on the back of the fixing ring (202d-4) for pushing the moving contact (202c) to separate and disconnect from the static contact (103c), and one end of the first spring (202d-5) away from the fixing ring (202d-4) is fixedly connected to the front end surface of the small electromagnet (202d-3).

7. The multi-protection intelligent circuit breaker according to claim 6, characterized in that: The reset assembly (203) comprises a motor (203a) arranged on the right inner wall of the housing (101), a cam (203b) arranged at the output end of the motor (203a), and a pressing piece (203c) arranged on the right inner wall of the housing (101) and located in front of the cam (203b).

8. The multi-protection intelligent circuit breaker according to claim 7, characterized in that: The pressing member (203c) comprises a support rod (203c-1) arranged on the right inner wall of the housing (101), a paddle (203c-2) rotatably arranged outside the support rod (203c-1) and located in front of the cam (203b), and a push plate (203c-3) arranged inside the paddle (203c-2 and used to press down and push the relay plate (202b) to move downward and close under the drive of the cam (203b); The pressing member (203c) further comprises a second spring (203c-4) arranged outside the paddle (203c-2), and one end of the second spring (203c-4) away from the paddle (203c-2) is fixed to the inner wall of the housing (101) so as to control the paddle (203c-2) to return to the starting position.

9. The multi-protection intelligent circuit breaker according to claim 8, characterized in that: The outer side of the push plate (203c-3) is provided with a placement opening for the push plate (203c-3) to be sleeved and arranged on the outer side of the reset push rod (202a).

10. The multi-protection intelligent circuit breaker according to claim 9, characterized in that: The shape of the paddle (203c-2) is set to be an inclined L-shape, and the second spring (203c-4) is arranged parallel to the paddle (203c-2).

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