Shunt sampling assembly and circuit breaker

Abstract

The utility model relates to the technical field of low-voltage electric appliances, and particularly discloses a shunt sampling assembly and a circuit breaker, the shunt sampling assembly comprises a sampling signal line, a sampling PCB and a shunt conductive bridge, the circuit breaker is provided with an L-pole wire inlet end and an N-pole wire inlet end which are connected with the positive electrode and the negative electrode of a power supply, and an L-pole wire outlet end and an N-pole wire outlet end which are connected with a load; the N-pole wire outlet end is connected with a moving contact of the circuit breaker, the shunt conductive bridge is provided with a static contact which can be switched on and off with the moving contact, one end of the sampling signal line is connected with the shunt conductive bridge, and the other end of the sampling signal line is connected with the sampling PCB. By improving the sampling circuit, the shunt sampling assembly can be integrated in the circuit breaker, the size of the circuit breaker is effectively reduced, and the manufacturing cost is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of low-voltage electrical appliances, and in particular to a shunt sampling assembly and a circuit breaker. Background Art

[0002] A shunt is usually provided in the circuit breaker to sample the current signal of the circuit breaker. In the prior art, the shunt is usually provided at the L pole, and additional isolation is required to increase the creepage distance to prevent breakdown. Therefore, the parts are complex and occupy a large space. Utility Model Content

[0003] The purpose of the present application is to provide a shunt sampling component and a circuit breaker, which can integrate the shunt sampling component into the circuit breaker through the improvement of the sampling circuit, effectively reduce the volume of the circuit breaker, and reduce the manufacturing cost.

[0004] The embodiment of the present application is implemented as follows:

[0005] In the first aspect, an embodiment of the present application discloses a shunt sampling component, which is configured in a circuit breaker. The shunt sampling component includes a sampling signal line, a sampling PCB board and a shunt conductive bridge. The circuit breaker has an L-pole input terminal and an N-pole input terminal connected to the positive and negative poles of the power supply, and an L-pole output terminal and an N-pole output terminal connected to the load; the N-pole output terminal is connected to the moving contact of the circuit breaker, and a static contact that can be opened and closed with the moving contact is arranged on the shunt conductive bridge. One end of the sampling signal line is connected to the shunt conductive bridge, and the other end is connected to the sampling PCB board.

[0006] As an optional embodiment, the shunt conductive bridge includes a first conductive plate and a second conductive plate spaced apart from each other, a resistor block is disposed between the first conductive plate and the second conductive plate, and one end of the resistor block is connected to the first conductive plate and the other end is connected to the second conductive plate.

[0007] As an optional implementation, the first conductive plate and the second conductive plate have the same extension path.

[0008] As an optional implementation, two connecting earrings are provided on the resistance block, there are two sampling signal lines, and the ends of the two sampling signal lines are respectively welded to the two connecting earrings.

[0009] As an optional implementation, one of the connecting earrings is close to the first conductive plate, the other connecting earring is close to the second conductive plate, and the two connecting earrings are located on one side or both sides of the extension direction of the diverter conductive bridge.

[0010] As an optional implementation manner, the extending direction of the sampling signal line is parallel to or intersects with the extending direction of the shunt conductive bridge.

[0011] In the second aspect, an embodiment of the present application discloses a circuit breaker, comprising a shell, a moving contact and the above-mentioned shunt sampling assembly; an N-pole outlet terminal electrically connected to the moving contact is provided on the side wall of the shell, one end of the shunt conductive bridge is connected to the sampling PCB board through a sampling signal line, and the other end is provided with a static contact that can open and close the switch with the moving contact.

[0012] As an optional implementation, a main control board is disposed in the housing, and the sampling PCB board is electrically connected to the main control board via a plug-in assembly.

[0013] As an optional implementation, a circuit board for processing signals is also disposed in the housing, and the circuit board is arranged vertically to the main control board.

[0014] As an optional implementation, a middle isolation plate is provided in the shell, a slot is provided on the middle isolation plate, and the diverter conductive bridge is embedded in the slot.

[0015] As an optional implementation, it further includes an arc extinguishing component, and the arc extinguishing component is located on one side of the shunt conductive bridge.

[0016] The beneficial effects of the embodiments of the present application include:

[0017] The embodiment of the present application discloses a shunt sampling component, which is configured in a circuit breaker. The shunt sampling component includes a sampling signal line, a sampling PCB board, and a shunt conductive bridge. The circuit breaker has an L-pole inlet terminal and an N-pole inlet terminal connected to the positive and negative poles of the power supply, and an L-pole outlet terminal and an N-pole outlet terminal connected to the load; the N-pole outlet terminal is connected to the moving contact of the circuit breaker, and a static contact that can be opened and closed with the moving contact is arranged on the shunt conductive bridge. One end of the sampling signal line is connected to the shunt conductive bridge, and the other end is connected to the sampling PCB board. The shunt conductive bridge of the embodiment of the present application is electrically connected to the N-pole of the circuit breaker. Since the internal resistance of the circuit breaker is very small, the resistance of the load is generally much larger than the internal resistance of the circuit breaker. Therefore, the voltage of the power supply and the voltage of the load can be basically regarded as equal. At this time, the voltage shared by the shunt is very small, so that the voltage on the shunt conductive bridge is close to the PCB weak current signal supply voltage. Therefore, the shunt sampling component is arranged at the N-pole of the circuit breaker without the need to specially set up isolation to prevent breakdown, thereby reducing the volume of the circuit breaker.

[0018] In the second aspect, the embodiment of the present application discloses a circuit breaker, including a housing, a moving contact and the above-mentioned shunt sampling assembly; an N-pole outlet terminal electrically connected to the moving contact is provided on the side wall of the housing, one end of the shunt conductive bridge is connected to the sampling PCB board through a sampling signal line, and the other end is provided with a static contact capable of opening and closing with the moving contact. Compared with the prior art, the embodiment of the present application adopts the above-mentioned shunt sampling assembly, which can integrate the shunt sampling assembly into the circuit breaker through the improvement of the sampling circuit, effectively reducing the size of the circuit breaker, avoiding the need for an external expansion module for the circuit breaker, and avoiding the need for strong electrical isolation modules such as mutual inductors, thereby effectively reducing the manufacturing cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 This is a circuit connection diagram of the current shunt sampling component of an embodiment of the present application;

[0021] Figure 2 This is one of the structural schematic diagrams of the flow splitting sampling assembly of the embodiment of the present application;

[0022] Figure 3 This is the second structural diagram of the flow splitting and sampling assembly of the embodiment of the present application;

[0023] Figure 4 This is the third structural diagram of the flow splitting sampling component of the embodiment of the present application;

[0024] Figure 5 This is a schematic diagram of the structure of a circuit breaker according to an embodiment of the present application.

[0025] Icons: 100- shunt sampling assembly; 101- circuit breaker; 102- shunt conductive bridge; 103- sampling signal line; 104- sampling PCB board; 105- N-pole outlet terminal; 106- static contact; 107- first conductive plate; 108- second conductive plate; 109- resistance block; 110- connecting earring; 112- shell; 113- N-pole inlet terminal; 114- main control board; 115- plug-in assembly; 116- slot; 117- arc extinguishing assembly; 118- L-pole inlet terminal; 119- power supply; 120- L-pole outlet terminal; 121- load; 122- moving contact; 123- middle isolation plate. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0028] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0029] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0030] A shunt and a sampling transformer are usually arranged inside the circuit breaker 101 to sample the current signal of the circuit breaker 101. Since the prior art samples the strong current of the power supply, a strong current isolation module needs to be arranged. The problem with the prior art is that the shunt sampling assembly 100 provided therein occupies a large space and cannot be directly integrated inside the circuit breaker 101. An expansion housing 112 needs to be externally connected to the housing 112 of the circuit breaker 101 for installing a large volume structure such as a sampling transformer, which not only increases the volume of the entire switch, but also increases the manufacturing cost.

[0031] In order to solve the above technical problems, an embodiment of the present application provides a shunt sampling assembly 100 and a circuit breaker 101 .

[0032] Reference Figure 1 and Figure 2As shown, an embodiment of the present application discloses a shunt sampling component 100, which is configured in a circuit breaker 101. The shunt sampling component 100 includes a sampling signal line 103, a sampling PCB board 104 and a shunt conductive bridge 102. The circuit breaker 101 has an L-pole input terminal 118 and an N-pole input terminal 113 connected to the positive and negative poles of a power supply 119, and an L-pole output terminal 120 and an N-pole output terminal 105 connected to a load 121; the N-pole output terminal 105 is electrically connected to a moving contact 122 of the circuit breaker 101, and a static contact 106 that can be opened and closed with the moving contact 122 is arranged on the shunt conductive bridge 102. One end of the sampling signal line 103 is connected to the shunt conductive bridge 102, and the other end is connected to the sampling PCB board 104.

[0033] It should be noted that the shunt conductive bridge 102 is electrically connected to the N pole of the circuit breaker 101. Since the internal resistance of the circuit breaker 101 is very small, the resistance of the load 121 is generally much larger than the internal resistance of the circuit breaker 101. Therefore, the voltage of the power supply 119 and the voltage of the load 121 can be basically regarded as equal. At this time, the voltage shared by the shunt is very small. The embodiment of the present application connects the shunt conductive bridge 102 to the N pole of the circuit breaker 101, so that the voltage on the shunt conductive bridge 102 is close to the PCB weak current signal supply voltage. Therefore, the shunt sampling component is set at the N pole of the circuit breaker, and there is no need to specially set up isolation to prevent breakdown, thereby reducing the size of the circuit breaker.

[0034] It should be noted that one end of the shunt conductive bridge 102 of the embodiment of the present application can be conductively connected to the moving contact 122 through the static contact 106, and the other end is conductively connected to the sampling signal line 103. The static contact 106 can form a current path by closing with the moving contact 122. In this state, the sampling signal line 103 can transfer the sampling current to the sampling PCB board 104. The static contact 106 and the moving contact 122 are in an open state, and the shunt conductive bridge 102 is disconnected and does not form a current path.

[0035] The current splitter sampling assembly 100 of the embodiment of the present application can be integrated inside the housing 112 of the circuit breaker 101 to avoid setting up expansion space on the circuit breaker 101 itself, thereby reducing the volume of the circuit breaker 101.

[0036] The shunt conductive bridge 102 of the embodiment of the present application is connected to the N-pole output terminal 105 through the closing of the moving contact 122 and the static contact 106 of the circuit breaker 101, that is, it serves as a part of the internal resistance of the circuit breaker 101. Since the voltage of the power supply 119 is close to the voltage of the external load 121, the voltage on the internal shunt conductive bridge 102 can be greatly reduced, so that the PCB control board can directly access the weak current signal, avoiding the need for processing through strong current isolation and transformer structures, so the embodiment of the present application can form a sampling electrical signal that can be directly accepted by the sampling PCB board.

[0037] The embodiment of the present application discloses a shunt sampling assembly 100, which is configured in a circuit breaker 101. The shunt sampling assembly 100 includes a shunt conductive bridge 102, a sampling signal line 103, and a sampling PCB board 104. The sampling signal line 103 of the embodiment of the present application is connected to the shunt conductive bridge 102 at one end and connected to the sampling PCB board 104 at the other end. The current data of the shunt conductive bridge 102 is collected through the sampling signal line 103 to achieve sampling of electrical signal data. The circuit breaker 101 has an N-pole outlet terminal 105. The shunt conductive bridge 102 of the embodiment of the present application transmits current to the sampling signal line 103 through the closing and conduction of the moving contact 122 and the static contact 106, so that the sampling PCB board 104 can perform electrical signal sampling. Since the voltage of the load 121 is basically close to the voltage of the power supply 119, the voltage on the circuit of the shunt conductive bridge 102 is a micro voltage, so that the shunt sampling component 100 can directly detect weak current signals close to the potential of the control board, so that the circuit breaker 101 can avoid setting up a large-volume power supply 119 strong current isolation component. The embodiment of the present application can directly integrate the sampling component inside the circuit breaker 101, thereby greatly reducing the volume of the circuit breaker 101.

[0038] Reference Figure 2 , Figure 3 as well as Figure 4 As shown, as an optional embodiment, the shunt conductive bridge 102 includes a first conductive plate 107 and a second conductive plate 108 arranged with a spacing, a resistor block 109 is arranged between the first conductive plate 107 and the second conductive plate 108, and one end of the resistor block 109 is connected to the first conductive plate 107, and the other end is connected to the second conductive plate 108.

[0039] Furthermore, the shunt conductive bridge 102 of the embodiment of the present application includes a first conductive plate 107 and a second conductive plate 108 arranged at a distance, and the first conductive plate 107 and the second conductive plate 108 are connected by a resistor block 109. The first conductive plate 107 and the second conductive plate 108 provided in the embodiment of the present application can carry a large current, improve the carrying capacity of the shunt conductive bridge 102, and help improve the safety capability of the circuit breaker 101.

[0040] It should be noted that the resistance value of the resistor block 109 can be specifically set by those skilled in the art according to the size of the sampled electrical signal, and is not particularly limited thereto.

[0041] The resistor block 109 may be a manganese copper resistor or a resistor block 109 made of other materials, and those skilled in the art may configure the resistor block 109 as required.

[0042] Reference Figure 4As shown, as an optional implementation, the extension paths of the first conductive plate 107 and the second conductive plate 108 are consistent.

[0043] It should be noted that a static contact 106 is provided at the end of the first conductive plate 107 to realize opening and closing with the moving contact 122 .

[0044] In the embodiment of the present application, the first conductive plate 107 and the second conductive plate 108 extend in the same path, that is, the first conductive plate 107 and the second conductive plate 108 extend along the same straight line, wherein the static contact 106 can be bent and disposed at the end of the first conductive plate 107. The straight line extension allows the shunt conductive bridge 102 to occupy a smaller space, and is convenient for integrated installation inside the circuit breaker 101.

[0045] Reference Figure 3 and Figure 4 As shown, two connecting earrings 110 are provided on the resistor block 109 , there are two sampling signal lines 103 , and the ends of the two sampling signal lines 103 are respectively welded to the two connecting earrings 110 .

[0046] Exemplarily, one connecting earring 110 is close to the first conductive plate 107 , and the other connecting earring 110 is close to the second conductive plate 108 , and the two connecting earrings 110 are located on the same side of the extension direction of the shunt conductive bridge 102 .

[0047] Exemplarily, one connecting earring 110 is close to the first conductive plate 107 , the other connecting earring 110 is close to the second conductive plate 108 , and the two connecting earrings 110 are located on both sides of the extension direction of the shunt conductive bridge 102 .

[0048] Reference Figure 2 and Figure 3 As shown, as an optional implementation, the extending direction of the sampling signal line 103 is parallel to or intersects with the extending direction of the shunt conductive bridge 102 .

[0049] It should be noted that one end of the sampling signal line 103 is conductively connected to the connecting earring 110 , and the other end is electrically connected to the sampling PCB board 104 . Those skilled in the art can set the extension direction of the sampling signal line 103 according to the specific positions of the sampling PCB board 104 and the resistor block 109 .

[0050] Reference Figure 1 and Figure 5As shown, an embodiment of the present application discloses a circuit breaker 101, including a shell 112, a moving contact 122 and the above-mentioned shunt sampling assembly 100; an N-pole outlet terminal 105 electrically connected to the moving contact 122 is provided on the side wall of the shell 112, one end of the shunt conductive bridge 102 is connected to the sampling PCB board 104 through a sampling signal line 103, and the other end is provided with a static contact 106 that can open and close the switch with the moving contact 122.

[0051] Compared with the prior art, the embodiment of the present application adopts the above-mentioned shunt sampling component 100, which can integrate the shunt sampling component 100 into the circuit breaker 101 through the improvement of the sampling circuit, effectively reducing the volume of the circuit breaker 101, avoiding the need for an external expansion module for the circuit breaker 101, and avoiding the need for a strong electrical isolation module, thereby effectively reducing the manufacturing cost.

[0052] Reference Figure 2 , Figure 3 as well as Figure 5 As an optional implementation, a main control board 114 is disposed in the housing 112, and the sampling PCB 104 is electrically connected to the main control board 114 via a plug assembly 115. The plug assembly 115 of the embodiment of the present application may be a 16-bit sampling pin or other types of sampling pins.

[0053] As an optional implementation, a circuit board for processing signals is also disposed in the housing 112 , and the circuit board is arranged vertically to the main control board 114 .

[0054] Reference Figure 1 As shown, further, a middle isolation plate 123 is disposed in the housing 112 , a slot 116 is disposed on the middle isolation plate 123 , and the shunt conductive bridge 102 is embedded in the slot 116 . An arc extinguishing component 117 is also included, and the arc extinguishing component 117 is located on one side of the shunt conductive bridge 102 .

[0055] In the embodiment of the present application, the stationary contact 106 and the shunt conductive bridge 102 can be installed through the slot 116 , so as to facilitate the integrated installation of the shunt sampling assembly 100 .

[0056] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A current divider sampling assembly, arranged in a circuit breaker (101), characterized in that: The shunt sampling assembly (100) comprises a sampling signal line (103), a sampling PCB board (104) and a shunt conductive bridge (102); the circuit breaker (101) comprises an L-pole inlet terminal (118) and an N-pole inlet terminal (113) connected to the positive and negative poles of a power source (119), and an L-pole outlet terminal (120) and an N-pole outlet terminal (105) connected to a load (121); the N-pole outlet terminal (105) is connected to a moving contact (122) of the circuit breaker (101); a static contact (106) capable of opening and closing with the moving contact (122) is provided on the shunt conductive bridge (102); one end of the sampling signal line (103) is connected to the shunt conductive bridge (102), and the other end is connected to the sampling PCB board (104).

2. The flow divider sampling assembly according to claim 1, characterized in that: The shunt conductive bridge (102) comprises a first conductive plate (107) and a second conductive plate (108) which are spaced apart from each other, a resistor block (109) is arranged between the first conductive plate (107) and the second conductive plate (108), and one end of the resistor block (109) is connected to the first conductive plate (107) and the other end is connected to the second conductive plate (108); the first conductive plate (107) and the second conductive plate (108) have the same extension path.

3. The flow divider sampling assembly according to claim 2, characterized in that: The resistor block (109) is provided with two connecting earrings (110), there are two sampling signal lines (103), and the ends of the two sampling signal lines (103) are respectively welded to the two connecting earrings (110).

4. The flow divider sampling assembly according to claim 3, characterized in that: One of the connecting earrings (110) is close to the first conductive plate (107), the other connecting earring (110) is close to the second conductive plate (108), and the two connecting earrings (110) are located on one side or both sides of the extension direction of the shunt conductive bridge (102).

5. The flow splitter sampling assembly according to claim 3, characterized in that: The extending direction of the sampling signal line (103) is parallel to or intersects with the extending direction of the shunt conductive bridge (102).

6. A circuit breaker, characterized in that: The invention comprises a shell (112), a moving contact (122) and a shunt sampling assembly (100) as claimed in any one of claims 1 to 5; an N-pole outlet terminal (105) electrically connected to the moving contact (122) is arranged on the side wall of the shell (112); one end of the shunt conductive bridge (102) is connected to a sampling PCB board (104) through a sampling signal line (103), and the other end is provided with a static contact (106) capable of opening and closing the switch with the moving contact (122).

7. The circuit breaker according to claim 6, characterized in that: A main control board (114) is arranged in the housing (112), and the sampling PCB board (104) is electrically connected to the main control board (114) via a plug-in assembly (115).

8. The circuit breaker according to claim 7, characterized in that: A circuit board for processing signals is also disposed in the housing (112), and the circuit board is arranged vertically with the main control board (114).

9. The circuit breaker according to claim 7, characterized in that: A middle isolation plate (123) is arranged in the housing (112), a slot (116) is arranged on the middle isolation plate (123), and the shunt conductive bridge (102) is embedded in the slot (116).

10. The circuit breaker according to claim 7, characterized in that: It also includes an arc extinguishing component (117), wherein the arc extinguishing component (117) is located on one side of the shunt conductive bridge (102).

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