CN222506424U - Shunt sampling assembly and circuit breaker - Google Patents

Abstract

The application relates to the technical field of low-voltage appliances, and particularly discloses a current divider sampling assembly and a circuit breaker, wherein the current divider sampling assembly comprises a sampling signal wire, a sampling PCB (printed circuit board) and a current divider conducting bridge, the circuit breaker is provided with an L-pole wire inlet end, an N-pole wire inlet end, an L-pole wire outlet end and an N-pole wire outlet end, the L-pole wire inlet end and the N-pole wire outlet end are connected with a moving contact of the circuit breaker, a fixed contact capable of being switched on and off with the moving contact is arranged on the current divider conducting bridge, one end of the sampling signal wire is connected with the current divider conducting bridge, and the other end of the sampling signal wire is connected with the sampling PCB. According to the application, through improvement of the sampling circuit, the sampling component of the current divider can be integrated in the circuit breaker, so that the size of the circuit breaker is effectively reduced, and the manufacturing cost is reduced.

Description

Shunt sampling assembly and circuit breaker

Technical Field

The application relates to the technical field of piezoelectric devices, in particular to a current divider sampling assembly and a circuit breaker.

Background

The current signal that sets up the shunt in the circuit breaker generally samples the circuit breaker, and the shunt sets up in the L utmost point in the prior art generally, needs to set up the isolation in order to increase creepage distance and prevent to break down, therefore the part is complicated and occupation space is big.

Disclosure of utility model

The application aims to provide a shunt sampling assembly and a circuit breaker, which can enable the shunt sampling assembly to be integrated in the circuit breaker through improving a sampling circuit, effectively reduce the volume of the circuit breaker and reduce the manufacturing cost.

Embodiments of the present application are implemented as follows:

In a first aspect, the embodiment of the application discloses a current divider sampling assembly, which is configured in a circuit breaker, wherein the current divider sampling assembly comprises a sampling signal wire, a sampling PCB (printed circuit board) and a current divider conducting bridge, the circuit breaker is provided with an L-pole wire inlet end, an N-pole wire inlet end, an L-pole wire outlet end and an N-pole wire outlet end, the L-pole wire inlet end and the N-pole wire outlet end are connected with a moving contact of the circuit breaker, the upper part of the current divider conducting bridge is provided with a fixed contact which can be switched on and off with the moving contact, one end of the sampling signal wire is connected with the current divider conducting bridge, and the other end of the sampling signal wire is connected with the sampling PCB.

As an alternative implementation manner, the current divider conductive bridge comprises a first conductive plate and a second conductive plate which are provided with a space, a resistor block is arranged between the first conductive plate and the second conductive plate, and one end of the resistor block is connected with the first conductive plate, and the other end of the resistor block is connected with the second conductive plate.

As an alternative embodiment, the first conductive plate coincides with the extension path of the second conductive plate.

As an alternative implementation mode, two connecting lugs are arranged on the resistor block, two sampling signal wires are arranged, and the end parts of the two sampling signal wires are respectively welded with the two connecting lugs.

As an alternative embodiment, one of the connection lugs is close to the first conductive plate, the other connection lug is close to the second conductive plate, and the two connection lugs are located on one side or two sides of the extending direction of the shunt conductive bridge.

As an alternative embodiment, the extending direction of the sampling signal line is parallel to or intersects with the extending direction of the shunt conductive bridge.

In a second aspect, the embodiment of the application discloses a circuit breaker, which comprises a shell, a moving contact and the shunt sampling assembly, wherein an N-pole outlet end electrically connected with the moving contact is arranged on the side wall of the shell, one end of a shunt conducting bridge is communicated with a sampling PCB board through a sampling signal wire, and the other end of the shunt conducting bridge is provided with a fixed contact capable of being switched on and off with the moving contact.

As an optional implementation manner, a main control board is arranged in the shell, and the sampling PCB board is electrically connected with the main control board through a plug-in component.

As an alternative implementation manner, a circuit board for processing signals is further arranged in the shell, and the circuit board is vertically arranged with the main control board.

As an alternative implementation manner, a middle isolation plate is arranged in the shell, a clamping groove is formed in the middle isolation plate, and the current divider conductive bridge is embedded into the clamping groove.

As an alternative embodiment, the current divider further comprises an arc extinguishing assembly, wherein the arc extinguishing assembly is positioned at one side of the current divider conductive bridge.

The beneficial effects of the embodiment of the application include:

The embodiment of the application discloses a shunt sampling assembly which is configured in a circuit breaker, wherein the shunt sampling assembly comprises a sampling signal wire, a sampling PCB (printed circuit board) and a shunt conducting 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 anode and the cathode 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, a fixed contact which can be switched on and off with the moving contact is arranged on the shunt conducting bridge, one end of the sampling signal wire is connected with the shunt conducting bridge, and the other end of the sampling signal wire is connected with the sampling PCB. The current divider conducting bridge is electrically connected to the N pole of the circuit breaker, the internal resistance of the circuit breaker is very small, the resistance of the load is generally far greater than the internal resistance of the circuit breaker, so that the voltage of the power supply and the voltage of the load can be basically regarded as equal, the voltage shared by the current divider is very small, the voltage on the current divider conducting bridge is close to the weak-current signal power supply voltage of the PCB, and therefore, the current divider sampling assembly is arranged at the N pole of the circuit breaker, and no special separation is needed to prevent breakdown, so that the volume of the circuit breaker is reduced.

In a second aspect, the embodiment of the application discloses a circuit breaker, which comprises a shell, a moving contact and the shunt sampling assembly, wherein an N-pole outlet end electrically connected with the moving contact is arranged on the side wall of the shell, one end of a shunt conductive bridge is communicated with a sampling PCB through a sampling signal wire, and the other end of the shunt conductive bridge is provided with a fixed contact capable of being switched on and off with the moving contact. Compared with the prior art, the current divider sampling assembly is adopted, and through improvement of the sampling circuit, the current divider sampling assembly can be integrated in the circuit breaker, so that the size of the circuit breaker is effectively reduced, the circuit breaker is prevented from being externally connected with a capacity expansion module, and the arrangement of a strong current isolation module such as a transformer is avoided, and the manufacturing cost is effectively reduced.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a circuit connection of a shunt sampling assembly according to an embodiment of the present application;

FIG. 2 is a schematic diagram of a shunt sampling assembly according to an embodiment of the present application;

FIG. 3 is a second schematic diagram of a shunt sampling assembly according to an embodiment of the present application;

FIG. 4 is a third schematic diagram of a split-flow sampling assembly according to an embodiment of the present application;

fig. 5 is a schematic structural diagram of a circuit breaker according to an embodiment of the present application.

The icons include 100-shunt sampling components, 101-circuit breakers, 102-shunt conductive bridges, 103-sampling signal wires, 104-sampling PCB boards, 105-N pole outlet terminals, 106-static contacts, 107-first conductive boards, 108-second conductive boards, 109-resistor blocks, 110-connecting lugs, 112-housings, 113-N pole inlet terminals, 114-main control boards, 115-plug-in components, 116-clamping grooves, 117-arc extinguishing components, 118-L pole inlet terminals, 119-power supplies, 120-L pole outlet terminals, 121-loads, 122-moving contacts and 123-middle isolation boards.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. The components of the embodiments of the present application generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the application, as presented in the figures, is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

It should be noted that like reference numerals and letters refer to like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

In the description of the present application, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected through an intermediary, or in communication between two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.

A current divider and a sampling transformer are generally disposed in the circuit breaker 101 to sample a current signal of the circuit breaker 101, and since the prior art samples a strong current of a power source, a strong current isolation module needs to be disposed. The problem that prior art exists is that the shunt sampling subassembly 100 that it provided occupation space is big, can't direct integrated setting in circuit breaker 101 is inside, needs external dilatation casing 112 on circuit breaker 101 casing 112 for install the great structure of sampling transformer equi-volume, not only lead to whole switch volume's increase, still lead to manufacturing cost to rise.

To solve the above technical problems, an embodiment of the present application provides a shunt sampling assembly 100 and a circuit breaker 101.

Referring to fig. 1 and 2, the embodiment of the application discloses a shunt sampling assembly 100, which is configured in a circuit breaker 101, wherein the shunt sampling assembly 100 comprises a sampling signal wire 103, a sampling PCB board 104 and a shunt conducting bridge 102, the circuit breaker 101 is provided with an L pole incoming wire end 118 and an N pole incoming wire end 113 which are connected with the positive pole and the negative pole of a power supply 119, and an L pole outgoing wire end 120 and an N pole outgoing wire end 105 which are connected with a load 121, the N pole outgoing wire end 105 is electrically connected with a moving contact 122 of the circuit breaker 101, a fixed contact 106 which can be switched with the moving contact 122 is arranged on the shunt conducting bridge 102, one end of the sampling signal wire 103 is connected with the shunt conducting bridge 102, and the other end is connected with the sampling PCB board 104.

It should be noted that, the shunt conducting 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, and the resistance of the load 121 is generally far greater than the internal resistance of the circuit breaker 101, so the voltage of the power source 119 and the voltage of the load 121 can be regarded as being substantially equal, and the voltage shared by the shunt is very small at this time, the embodiment of the application connects the shunt conducting bridge 102 to the N pole of the circuit breaker 101, so that the voltage on the shunt conducting bridge 102 is close to the weak-current signal supply voltage of the PCB, therefore, the shunt sampling assembly is arranged on the N pole of the circuit breaker, and no special isolation is required to prevent breakdown, thereby reducing the volume of the circuit breaker.

It should be noted that, in the embodiment of the present application, one end of the shunt conductive bridge 102 may be electrically connected to the moving contact 122 through the fixed contact 106, and the other end is electrically connected to the sampling signal line 103, where the fixed contact 106 may form a current path by closing with the moving contact 122, and in this state, the sampling signal line 103 may transmit the sampling current to the sampling PCB 104. The static contact 106 and the moving contact 122 are in a separated state, and the shunt conductive bridge 102 is disconnected to form no current path.

The shunt sampling assembly 100 of the embodiment of the application can be integrally arranged in the shell 112 of the circuit breaker 101, so that the capacity expansion space is avoided being arranged on the circuit breaker 101, and the volume of the circuit breaker 101 can be reduced.

The current divider conductive bridge 102 in the embodiment of the application is connected to the N-pole outlet 105 through the switch-on conduction of the moving contact 122 and the fixed contact 106 of the circuit breaker 101, that is, is used as a part of the internal resistance of the circuit breaker 101. Because the voltage of the power supply 119 is close to the voltage of the external load 121, the voltage on the internal shunt conducting bridge 102 can be greatly reduced, so that a PCB control board can be directly connected into weak current signals, and the processing of structures such as a strong current isolation structure and a transformer is avoided.

The embodiment of the application discloses a current divider sampling assembly 100, which is configured in a circuit breaker 101, wherein the current divider sampling assembly 100 comprises a current divider conductive bridge 102, a sampling signal line 103 and a sampling PCB 104, one end of the sampling signal line 103 of the embodiment of the application is connected with the current divider conductive bridge 102, the other end is connected with the sampling PCB 104, and the current data of the current divider conductive bridge 102 is acquired through the sampling signal line 103, so that the sampling of the electric signal data is realized. The circuit breaker 101 has an N-pole wire outlet 105, and the current divider conductive bridge 102 in the embodiment of the present application transfers current to the sampling signal wire 103 through the closing and conducting between the moving contact 122 and the fixed contact 106, so that the sampling PCB 104 can sample the electrical signal. Because the voltage of the load 121 is substantially 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 assembly 100 can directly detect a weak current signal close to the control board potential, and the circuit breaker 101 can avoid setting a power supply 119 strong current isolation assembly with a larger volume. The embodiment of the application can directly integrate the sampling component in the circuit breaker 101, thereby realizing the great reduction of the volume of the circuit breaker 101.

Referring to fig. 2, 3 and 4, as an alternative embodiment, the shunt conductive bridge 102 includes a first conductive plate 107 and a second conductive plate 108 provided with a space therebetween, a resistor block 109 is provided 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.

Further, the shunt conductive bridge 102 according to the embodiment of the present application includes a first conductive plate 107 and a second conductive plate 108 disposed with a space therebetween, 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 by the embodiment of the application can bear larger current, so that the bearing capacity of the shunt conductive bridge 102 is improved, and the safety capacity of the circuit breaker 101 is improved.

It should be noted that the size of 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, which is not particularly limited.

The resistor block 109 may be a manganese copper resistor, or may be a resistor block 109 made of other materials, which may be set by those skilled in the art as required.

Referring to fig. 4, as an alternative embodiment, the first conductive plate 107 coincides with the extension path of the second conductive plate 108.

The fixed contact 106 is disposed at the end of the first conductive plate 107, so as to switch on or off the movable contact 122.

In this embodiment of the present application, the extension paths of the first conductive plate 107 and the second conductive plate 108 are identical, that is, the first conductive plate 107 and the second conductive plate 108 extend along the same straight line, where the fixed contact 106 may be disposed at the end of the first conductive plate 107 by bending. The shunt conductive bridge 102 occupies a small space by extending linearly, and is convenient to be integrally installed inside the circuit breaker 101.

Referring to fig. 3 and 4, two connection lugs 110 are provided on the resistor block 109, two sampling signal lines 103 are provided, and the ends of the two sampling signal lines 103 are welded to the two connection lugs 110, respectively.

Illustratively, one connection ear 110 is adjacent to the first conductive plate 107, the other connection ear 110 is adjacent to the second conductive plate 108, and the two connection ears 110 are located on the same side of the shunt conductive bridge 102 in the extending direction.

Illustratively, one connection ear 110 is adjacent to the first conductive plate 107, the other connection ear 110 is adjacent to the second conductive plate 108, and the two connection ears 110 are located on opposite sides of the shunt conductive bridge 102 in the extending direction.

As an alternative embodiment, as shown in fig. 2 and 3, the extending direction of the sampling signal line 103 is parallel to or intersects with the extending direction of the shunt conductive bridge 102.

It should be noted that, one end of the sampling signal line 103 is electrically connected to the connection ear ring 110, the other end is electrically connected to the sampling PCB 104, and the extending direction of the sampling signal line 103 can be set by a person skilled in the art according to the specific positions of the sampling PCB 104 and the resistor block 109.

Referring to fig. 1 and 5, the embodiment of the application discloses a circuit breaker 101, which comprises a housing 112, a moving contact 122 and the shunt sampling assembly 100, wherein an N-pole outlet terminal 105 electrically connected with the moving contact 122 is arranged on the side wall of the housing 112, one end of a shunt conducting bridge 102 is communicated with a sampling PCB 104 through a sampling signal wire 103, and the other end of the shunt conducting bridge is provided with a fixed contact 106 capable of opening and closing with the moving contact 122.

Compared with the prior art, the current divider sampling assembly 100 is adopted in the embodiment of the application, and the current divider sampling assembly 100 can be integrated in the circuit breaker 101 through the improvement of the sampling circuit, so that the volume of the circuit breaker 101 is effectively reduced, the circuit breaker 101 is prevented from being externally connected with a capacity expansion module, and the arrangement of a strong electric isolation module is avoided, thereby effectively reducing the manufacturing cost.

Referring to fig. 2, 3 and 5 as an alternative embodiment, a main control board 114 is disposed within the housing 112, and the sampling PCB board 104 is electrically connected to the main control board 114 through a plug assembly 115. The plug assembly 115 of embodiments of the present application may be a 16-bit sampling pin, or may be other types of sampling pins.

As an alternative embodiment, a circuit board for processing signals is further provided in the housing 112, and the circuit board is arranged perpendicular to the main control board 114.

Referring to fig. 1, further, a middle isolation plate 123 is disposed in the housing 112, a clamping groove 116 is disposed on the middle isolation plate 123, and the shunt conductive bridge 102 is embedded in the clamping groove 116. And also includes an arc extinguishing assembly 117, the arc extinguishing assembly 117 being located on one side of the shunt conductive bridge 102.

The embodiment of the application can install the fixed contact 106 and the current divider conductive bridge 102 through the clamping groove 116, so that the integrated installation of the current divider sampling assembly 100 is convenient to realize.

The above description is only of the preferred embodiments of the present application and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims (10)

1. The shunt sampling assembly is configured in a circuit breaker (101), and is characterized in that the shunt sampling assembly (100) comprises a sampling signal wire (103), a sampling PCB (104) and a shunt conducting bridge (102), the circuit breaker (101) is provided with an L pole wire inlet end (118) and an N pole wire inlet end (113) which are connected with the anode and the cathode of a power supply (119), an L pole wire outlet end (120) and an N pole wire outlet end (105) which are connected with a load (121), the N pole wire outlet end (105) is connected with a moving contact (122) of the circuit breaker (101), a fixed contact (106) which can be switched on and off with the moving contact (122) is arranged on the shunt conducting bridge (102), one end of the sampling signal wire (103) is connected with the shunt conducting bridge (102), and the other end of the sampling signal wire (103) is connected with the sampling PCB (104).

2. The shunt sampling assembly of claim 1, wherein said shunt conducting bridge (102) comprises a first conducting plate (107) and a second conducting plate (108) arranged with a distance therebetween, a resistor block (109) is arranged between said first conducting plate (107) and said second conducting plate (108), one end of said resistor block (109) is connected to said first conducting plate (107) and the other end is connected to said second conducting plate (108), and an extension path of said first conducting plate (107) and said second conducting plate (108) are identical.

3. The shunt sampling assembly according to claim 2, wherein two connecting lugs (110) are arranged on the resistor block (109), two sampling signal wires (103) are arranged, and the ends of the two sampling signal wires (103) are respectively welded with the two connecting lugs (110).

4. A shunt sampling assembly according to claim 3, wherein one of said connection lugs (110) is adjacent to said first conductive plate (107), the other connection lug (110) is adjacent to said second conductive plate (108), and wherein both of said connection lugs (110) are located on one or both sides of the direction of extension of said shunt conductive bridge (102).

5. A shunt sampling assembly according to claim 3, characterized in that the direction of extension of the sampling signal line (103) is parallel or intersects the direction of extension of the shunt conductive bridge (102).

6. The circuit breaker is characterized by comprising a shell (112), a moving contact (122) and the shunt sampling assembly (100) according to any one of claims 1-5, wherein an N-pole outlet end (105) electrically connected with the moving contact (122) is arranged on the side wall of the shell (112), one end of a shunt conducting bridge (102) is conducted with a sampling PCB (104) through a sampling signal wire (103), and a fixed contact (106) capable of being switched on and off with the moving contact (122) is arranged at the other end of the shunt conducting bridge.

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

8. The circuit breaker according to claim 7, characterized in that a circuit board for processing signals is further provided in the housing (112), the circuit board being arranged perpendicularly to 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 clamping groove (116) is arranged on the middle isolation plate (123), and the shunt conductive bridge (102) is embedded in the clamping groove (116).

10. The circuit breaker of claim 7, further comprising an arc quenching assembly (117), the arc quenching assembly (117) being located on one side of the shunt conductive bridge (102).