CN220585170U

CN220585170U - Circuit breaker with leakage protection and data detection functions

Info

Publication number: CN220585170U
Application number: CN202322258898.XU
Authority: CN
Inventors: 马宏扬; 张丽梅
Original assignee: Shandong Jiebaian Electric Co ltd
Current assignee: Shandong Jiebaian Electric Co ltd
Priority date: 2023-08-22
Filing date: 2023-08-22
Publication date: 2024-03-12
Anticipated expiration: 2033-08-22

Abstract

The utility model discloses a circuit breaker with leakage protection and data detection functions, which belongs to the technical field of circuit breakers and comprises a tripping device, a tripping armature iron, a tripping coil, a microprocessor, a control conversion circuit connected with the microprocessor, a leakage detection circuit connected with a live wire and a zero wire through a first mutual inductance coil, a leakage protection driving circuit and a leakage current sampling circuit connected with the leakage detection circuit, wherein the leakage current sampling circuit is connected with an input port of the microprocessor, the leakage protection driving circuit and the control conversion circuit are connected with the tripping coil, a self-checking coil is connected with the first mutual inductance coil, and a wireless communication module, a display screen, the live wire current detection circuit and the zero wire current detection circuit are also connected with the microprocessor. The intelligent control system has the beneficial effects of multiple functions, simple structure and high intelligent degree.

Description

Circuit breaker with leakage protection and data detection functions

Technical Field

The utility model relates to the technical field of circuit breakers, in particular to a circuit breaker with leakage protection and data detection functions.

Background

A circuit breaker refers to a switching device capable of closing, carrying and opening a current under normal circuit conditions and closing, carrying and opening a current under abnormal circuit conditions within a prescribed time.

At present, a mainstream low-voltage circuit breaker in the market generally comprises a contact system, an arc extinguishing system, an operating mechanism, a tripper and the like, when an electric loop where the low-voltage circuit breaker is positioned is in short circuit, current is large, magnetic force generated by large current overcomes a counter-force spring, the tripper pulls the operating mechanism to act, and the low-voltage circuit breaker is tripped instantaneously, so that the judgment basis for tripping the low-voltage circuit breaker is to judge whether the current is overloaded or not. The disadvantage of this judgment method is that the overload detection value is unstable and the detection accuracy is low due to the adoption of the mechanical structure for measurement.

The utility model patent with publication number CN206774470U discloses a novel low-voltage circuit breaker with a data detection function, but in the circuit breaker, two tripping coils are needed to be used for tripping control because of overcurrent protection and leakage protection, so that the structural complexity of a circuit breaker product is increased, and in the use process, the intelligent degree is low, so that the circuit breaker has inconvenience in some situations needing remote control.

Disclosure of Invention

The utility model mainly aims to provide a circuit breaker with leakage protection and data detection functions, and aims to solve the technical problems of complex structure and insufficient intelligent degree of the existing circuit breaker.

In order to achieve the above purpose, the utility model provides a circuit breaker with functions of leakage protection and data detection, comprising a tripping device, a tripping armature and a tripping coil, wherein the tripping coil is provided with one iron core, the circuit breaker further comprises a microprocessor, a control conversion circuit connected with the microprocessor and a leakage detection circuit connected with a live wire and a zero wire through a first mutual inductance, the circuit breaker is connected with the leakage detection circuit and is provided with a leakage protection driving circuit and a leakage current sampling circuit, the leakage current sampling circuit is connected with an input port of the microprocessor, the leakage protection driving circuit and the control conversion circuit are connected with the tripping coil, the self-checking coil is connected with the first mutual inductance together, the first mutual inductance coil and the self-checking coil share one iron core, the self-checking coil is connected with the leakage self-checking circuit, the leakage self-checking circuit is connected with an output port of the microprocessor, the tripping device is provided with a contact position sensor, the contact position sensor is connected with an input port of the microprocessor, the circuit breaker is mechanically and rotatably connected with the tripping device, the speed reduction motor gear control mechanism is connected with the microprocessor through a direct current motor, and the direct current driving circuit is connected with the microprocessor, the live wire and the detection circuit, the wireless current detection circuit and the zero wire current detection circuit are connected with the live wire and the live wire through a wireless current detection circuit, the wireless mutual inductance circuit and the zero wire detection circuit respectively.

After the scheme is adopted, the first mutual inductance coil is adopted to sense the leakage current and detect the leakage current, when the leakage current exceeds a preset threshold value, the leakage protection driving circuit triggers the tripping coil to electrify, so that the tripping armature is driven to cause the tripping device to trip and cut off power, when the live wire current detection circuit detects that the live wire current exceeds the preset threshold value, the microprocessor outputs a signal to cause the control conversion circuit to control the tripping coil to electrify, so that the tripping armature is driven to cause the tripping device to trip and cut off power, and when overload or leakage occurs on the circuit, the tripping device is driven to cut off power by using one tripping coil, so that the control scheme of the circuit breaker is simpler and easier to implement; in the utility model, the leakage current detected by the leakage current detection circuit is sampled by the leakage current sampling circuit and is input into the microprocessor, so that the number of times of leakage current and the amount of leakage current generated by a circuit can be conveniently recorded, and the accumulated value can be conveniently processed after exceeding a preset value; the utility model also provides a contact position sensor for detecting the position of the tripping device, so that the microprocessor is used for driving and controlling the gear control mechanism of the gear motor to reset the tripping device; the utility model also provides a wireless communication module, and the wireless communication module can be used for realizing remote monitoring and remote control of the working state of the circuit breaker.

Preferably, the voltage detection circuit is connected with the live wire and the zero wire in a bridging way, the voltage detection circuit is a voltage division type voltage detection circuit, and the voltage detection circuit is connected with an input port of the microprocessor. After the preferred scheme, the voltage division type voltage detection circuit is adopted to detect the zero line voltage of the live wire, the working state of the circuit can be conveniently monitored by combining the monitoring of the line voltage, the line current and the leakage current, and meanwhile, the power consumption and the leakage current of the circuit can be obtained through calculation, so that the functionality and the use convenience of the circuit breaker are improved.

Preferably, the microprocessor is also connected with a serial communication interface in a communication way. The preferred scheme can use the serial port communication mode to carry out communication connection and control the circuit breaker, so that the convenience of the circuit breaker is improved.

Preferably, the temperature sensor and/or the control key are/is connected with the input port of the processor. After the preferred scheme is adopted, the working temperature of the circuit breaker can be monitored, and when the temperature is too high, the microprocessor can control the tripping coil through the control switching circuit to disconnect the circuit breaker from the power supply connection, so that the safety of power supply is improved.

Preferably, the wireless communication module is one or a combination of more than one of a WiFi wireless communication module, a 4G communication module or a 5G communication module. By adopting the preferred scheme, the remote control of the circuit breaker can be realized by utilizing various handheld terminals through a WiFi wireless network, a 4G communication network or a 5G communication network.

The utility model has at least the following beneficial effects: compared with the prior art, the circuit breaker in the technical scheme provided by the utility model can monitor the circuit current, voltage, leakage current, power consumption and leakage quantity, realizes various control effects on the tripping device by using one tripping coil, and has the beneficial effects of various functions, simple structure and high intelligent degree.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a circuit breaker with leakage protection and data detection functions according to the present utility model;

reference numerals illustrate:

1. the tripping device comprises a tripping device, 2, a tripping armature, 3, a tripping coil, 4, a microprocessor, 5, a control conversion circuit, 6, a leakage detection circuit, 7, a leakage protection driving circuit, 8, a leakage current sampling circuit, 9, a first mutual inductance coil, 10, a self-checking coil, 11, a leakage self-checking circuit, 12, a contact position sensor, 13, a gear control mechanism of a gear motor, 14, a direct current motor driving circuit, 15, a wireless communication module, 16, a display screen, 17, a voltage detection circuit, 18, a live wire current detection circuit, 19, a zero line current detection circuit, 20, a serial port communication interface, 21, a temperature sensor, 22, a control button, 23, a second mutual inductance coil, 24 and a third mutual inductance coil.

The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In order to better understand the above technical solutions, the following describes the above technical solutions in detail with reference to the accompanying drawings.

Referring to fig. 1, an embodiment of the present utility model provides a circuit breaker with leakage protection and data detection functions, including a trip device 1, a trip armature 2, and a trip coil 3, where the trip coil 3 is provided with one iron core, and further includes a microprocessor 4, a control switching circuit 5 connected to the microprocessor 4, and a leakage detection circuit 6 connected to the live wire and the zero line through a first mutual inductor 9, a leakage protection driving circuit 7 and a leakage current sampling circuit 8 connected to the leakage detection circuit 6, where the leakage current sampling circuit is connected to an input port of the microprocessor 4, the leakage protection driving circuit 7 and the control switching circuit are both connected to the trip coil 3, and a self-checking coil 10 connected to the first mutual inductor 9 and the self-checking coil 10 together, where the self-checking coil 10 is connected to the leakage self-checking circuit 11, the self-checking circuit 11 is connected to an output port of the microprocessor 4, the trip device 1 is provided with a contact position sensor 12, the contact position sensor 12 is connected to an input port of the microprocessor 4, and the trip motor 1 is connected to a speed-reducing mechanism 13, and a speed-reducing mechanism 13 is connected to the live wire and the zero line detection circuit 19 through a speed-reducing mechanism, and a wireless mutual inductor 19, and a speed-reducing mechanism is connected to the live wire detection circuit 19, and a wireless mutual inductor 18, and a speed-reducing mechanism is connected to the live wire detection mechanism 18.

In this embodiment, the wireless communication device further comprises a voltage detection circuit 17 connected across the live wire and the zero line, the voltage detection circuit 17 is a voltage division type voltage detection circuit, the voltage detection circuit 17 is connected with an input port of the microprocessor 4, the wireless communication device further comprises a serial communication interface 20 connected with the microprocessor 4 in a communication manner, the wireless communication device further comprises a temperature sensor 21 and an operation button 22 connected with the input port of the processor 4, and the wireless communication module 15 is a WiFi wireless communication module.

In this embodiment, the specific circuits of the voltage detection circuit, the live wire current detection circuit, the neutral wire current detection circuit, the leakage self-checking circuit, the leakage detection circuit, the leakage protection driving circuit, the leakage current adoption circuit, the direct current motor driving circuit and the control conversion circuit can be implemented by adopting circuits existing in the prior art, so that detailed circuit diagrams and control in the partial circuits are not repeated here.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.

In the present utility model, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present utility model, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" as it appears throughout includes three parallel schemes, for example "A and/or B", including the A scheme, or the B scheme, or the scheme where A and B are satisfied simultaneously. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

The foregoing description is only of the optional embodiments of the present utility model, and is not intended to limit the scope of the utility model, and all the equivalent structural changes made by the description of the present utility model and the accompanying drawings or the direct/indirect application in other related technical fields are included in the scope of the utility model.

Claims

1. The circuit breaker with the functions of leakage protection and data detection comprises a tripping device (1), a tripping armature (2) and a tripping coil (3), and is characterized in that the tripping coil (3) is provided with one, the circuit breaker also comprises a microprocessor (4), a control conversion circuit (5) connected with the microprocessor (4) and a leakage detection circuit (6) connected with a live wire and a zero line through a first mutual inductance coil (9) at the same time, the leakage detection circuit (6) is connected with an input port of the microprocessor (4) and provided with a leakage protection driving circuit (7) and a leakage current sampling circuit (8), the leakage current sampling circuit is connected with an output port of the microprocessor (4), the leakage protection driving circuit (7) and the control conversion circuit are connected with the tripping coil (3), a self-checking coil (10) is connected with the first mutual inductance coil (9) together, the self-checking coil (10) is connected with a leakage self-checking circuit (11), the leakage self-checking circuit (11) is connected with an output port of the microprocessor (4), the position sensor (12) is arranged at the position of the tripping device (1) and is connected with the input port of the microprocessor (12), the automatic tripping device is characterized in that a gear motor gear control mechanism (13) is further arranged in mechanical rotation connection with the tripping device (1), the gear motor gear control mechanism (13) is connected with the microprocessor (4) through a direct current motor driving circuit (14), the automatic tripping device further comprises a wireless communication module (15), a display screen (16), a live wire current detection circuit (18) and a zero line current detection circuit (19), and the live wire current detection circuit (18) and the zero line current detection circuit (19) are connected into a live wire and a zero line through a second mutual inductance coil (23) and a third mutual inductance coil (24) respectively.

2. The circuit breaker with the leakage protection and data detection functions according to claim 1, further comprising a voltage detection circuit (17) connected across a live wire and a zero wire, wherein the voltage detection circuit (17) is a voltage division type voltage detection circuit, and the voltage detection circuit (17) is connected with an input port of the microprocessor (4).

3. A circuit breaker with leakage protection and data detection according to claim 1, characterized in that it is communicatively connected to the microprocessor (4) and further comprises a serial communication interface (20).

4. A circuit breaker with leakage protection and data detection according to claim 1, characterized in that it further comprises a temperature sensor (21) or/and a control button (22) connected to the input port of the processor (4).

5. The circuit breaker with the earth leakage protection and data detection functions according to claim 1, wherein the wireless communication module (15) is one or a combination of more than one of a WiFi wireless communication module, a 4G communication module or a 5G communication module.