Wiring terminal and intelligent circuit breaker

Abstract

The utility model relates to the field of power equipment, discloses a wiring terminal and an intelligent circuit breaker, and can conveniently detect the material and the cross section size of a crimping cable and whether the crimping cable is loosened in the use process. The wiring terminal comprises a wiring board, a wiring frame, a connecting sheet and a binding post. The wiring board comprises a wire pressing body and a variable resistor, and the wire pressing body is slidably assembled on the inner side of the wiring frame in the first direction and used for being matched with the wiring frame to form a wiring space. The variable resistor is positioned on the outer side of the wiring frame and extends along a first direction; the variable resistor comprises a first measuring end; the connecting sheets are relatively fixed on the wiring frame; the connecting sheet comprises a contact point and a sliding measuring end electrically connected with the contact point; the contact point is slidably and electrically connected with the variable resistor; the binding post is arranged on the wiring frame and used for driving the wiring board to slide relative to the wiring frame and the connecting piece in the first direction so as to synchronously adjust the size of the wiring space and the resistance value between the first measuring end and the sliding measuring end.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power equipment, in particular to a wiring terminal and an intelligent circuit breaker. BACKGROUND

[0002] With the development of the application of Internet of Things technology, the intelligent power utilization technology in the terminal power distribution field of the power system has also developed rapidly, and intelligent power utilization is increasingly integrated into all aspects of people's work and life. The circuit breaker plays a crucial role in intelligent power utilization, and all terminal power distribution and power utilization fields require the use of circuit breakers. In recent years, many intelligent circuit breaker products with Internet of Things functions have appeared on the market for use in the terminal power distribution field.

[0003] An intelligent circuit breaker is a new type of circuit breaker product that combines remote control of circuit breaker closing and opening based on traditional circuit breakers, has functions such as voltage and current monitoring and protection, temperature detection, leakage detection and protection, and also has overload, short circuit, isolation and other protection functions of a transmission circuit breaker. At present, it is widely used in the upgrading of traditional circuit breakers in the financial, education, and household industries for energy efficiency management and operation monitoring and protection of terminal power grids.

[0004] There has been a defect in the use of circuit breakers, that is, the material of the cable connected to the wiring terminal of the circuit breaker cannot be automatically checked, and whether the crimped cable gradually loosens during use of the circuit breaker. This defect has been passed down from traditional circuit breakers to the current era of intelligent circuit breakers. CONTENT OF THE INVENTION

[0005] The present application discloses a wiring terminal and an intelligent circuit breaker for determining the material, cross-sectional size of the crimped cable connected at the time, and whether the crimped cable loosens during use by measuring the resistance value between the first measurement end and the sliding measurement end in the wiring terminal.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0007] In a first aspect, the present application provides a wiring terminal, comprising: a wiring board, a wiring frame, a connecting piece, and a wiring post;

[0008] The wiring board comprises a wire pressing body and a variable resistor, the wire pressing body is slidably assembled inside the wiring frame along a first direction, and is used to form a wiring space in cooperation with the wiring frame; the variable resistor is located outside the wiring frame and extends along the first direction; the variable resistor comprises a first measurement end;

[0009] The connecting piece is relatively fixed to the wiring frame; the connecting piece comprises a contact point and a sliding measurement end electrically connected to the contact point; the contact point is in sliding electrical connection with the variable resistor;

[0010] The connecting post is arranged on the connecting frame and is used to drive the connecting plate to slide relative to the connecting frame and the connecting piece in a first direction to synchronously adjust the size of the connecting space and the resistance value between the first measuring end and the sliding measuring end.

[0011] The connecting terminal is applied to the intelligent circuit breaker and is used to crimp the cable. Specifically, the connecting frame and the connecting plate cooperatively form the connecting space for accommodating the cable. The crimping body of the connecting plate can be driven by the connecting post to press the incoming cable. While the connecting plate slides relative to the connecting frame in the first direction, the variable resistor synchronously slides relative to the connecting frame in the first direction. The connecting piece is fixed to the connecting frame and synchronously moves with the connecting frame. The connecting piece has the contact point in electric connection with the variable resistor. To avoid the motion interference between the variable resistor and the incoming cable, the variable resistor is located outside the connecting frame. The variable resistor extends in the first direction, and when the connecting plate slides relative to the connecting frame in the first direction, the electric connection position of the variable resistor and the contact point also synchronously changes. The variable resistor has the first measuring end, and the connecting plate is provided with the sliding measuring end in electric connection with the contact point. When the contact point slides relative to the variable resistor in the first direction, the resistance between the first measuring end and the sliding measuring end changes, so that the material, cross-sectional size of the crimped cable when the cable is connected and whether the crimped cable is loose during use can be determined according to the resistance value between the first measuring end and the sliding measuring end.

[0012] In some embodiments, the variable resistor is a linear resistor.

[0013] In some embodiments, the variable resistor further includes a second measuring end, which is arranged opposite to the first measuring end in the first direction.

[0014] In some embodiments, the connecting piece is fixed to the inner side of the connecting frame and is used to cooperatively form the connecting space with the crimping body.

[0015] In some embodiments, the connecting frame includes the top plate and the bottom plate arranged opposite in the first direction, and the connecting piece is clamped to the bottom plate.

[0016] In some embodiments, the connecting piece is provided with a plurality of contact points, and the plurality of contact points are connected with the sliding measuring end; and at least one of the contact points is in electric connection with the variable resistor.

[0017] In some embodiments, the variable resistor includes the first strip segment and the second strip segment, the first strip segment is connected to the first measuring end and is used to electrically connect with the circuit board, and the second strip segment is connected to the second measuring end and is used to electrically connect with the circuit board.

[0018] In some embodiments, the sliding measurement end comprises a convex edge and a signal line; the convex edge is an integral structure with the contact point; and the signal line is welded to the convex edge for electrical connection with the circuit board.

[0019] In a second aspect, the embodiments of the present application further provide an intelligent circuit breaker, comprising a circuit board, a chip, and the wiring terminal according to any one of the embodiments of the first aspect;

[0020] The first measurement end, the second measurement end, and the sliding measurement end of the wiring terminal are electrically connected with the circuit board, and the chip is electrically connected with the circuit board.

[0021] The chip is configured to determine whether the cable connected with the wiring terminal is loose according to the resistance value between the first measurement end and the sliding measurement end.

[0022] In some embodiments, the intelligent circuit breaker further comprises an alarm;

[0023] The alarm is signal connected with the chip. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 A structural schematic diagram of a wiring terminal according to an embodiment of the present application is shown in FIG. 1;

[0025] Figure 2 An exploded view of a wiring terminal according to an embodiment of the present application is shown in FIG. 2;

[0026] Figure 3 A structural schematic diagram of one side of a wiring terminal according to an embodiment of the present application is shown in FIG. 3;

[0027] Figure 4 A structural schematic diagram of the other side of a wiring terminal according to an embodiment of the present application is shown in FIG. 4;

[0028] Figure 5 A structural schematic diagram of the other side of a wiring terminal according to an embodiment of the present application is shown in FIG. 5;

[0029] Figure 6 A structural schematic diagram of a wiring board in a wiring terminal according to an embodiment of the present application is shown in FIG. 6; Figure 1 ;

[0030] Figure 7 A structural schematic diagram of a wiring board in a wiring terminal according to an embodiment of the present application is shown in FIG. 7; Figure 2 ;

[0031] Figure 8 A structural schematic diagram of one side of a wiring board in a wiring terminal according to an embodiment of the present application is shown in FIG. 8;

[0032] Figure 9Another side structure diagram of a wiring board in a wiring terminal provided by an embodiment of the present application;

[0033] Figure 10 A structure diagram of a connecting piece in a wiring terminal provided by an embodiment of the present application Figure 1 ;

[0034] Figure 11 A structure diagram of a connecting piece in a wiring terminal provided by an embodiment of the present application Figure 2 ;

[0035] Figure 12 A structure diagram of a connecting piece in a wiring terminal provided by an embodiment of the present application Figure 3 ;

[0036] Figure 13 A structure diagram of a smart circuit breaker provided by an embodiment of the present application Figure 1 ;

[0037] Figure 14 A structure diagram of a smart circuit breaker provided by an embodiment of the present application Figure 2 ;

[0038] Figure 15 A structure diagram of a smart circuit breaker provided by an embodiment of the present application Figure 3 ;

[0039] Figure 16 A structure diagram of a smart circuit breaker provided by an embodiment of the present application Figure 4 ;

[0040] Figure 17 A control principle diagram of a smart circuit breaker provided by an embodiment of the present application

[0041] Icon: 100-wiring terminal; 110-wiring board; 120-wiring frame; 130-connecting piece; 140-wiring post; 111-wire pressing body; 1111-first wiring side plate; 1112-second wiring side plate; 1113-wire pressing plate; 112-variable resistor; 1121-first measuring end; 1121a-first bar segment; 1122-second measuring end; 1122a-second bar segment; 121-first side plate; 122-second side plate; 123-top plate; 123a-first top plate; 123b-second top plate; 124-bottom plate; 131-contact point; 132-sliding measuring end; 133-bending structure; 1321-convex edge; 1322-signal line; 200-circuit board; 300-chip; 400-alarm. DETAILED DESCRIPTION

[0042] First, introduce the application scenario of the present application: copper and aluminum are generally used as the conductive material of the cable, but the copper resources are less in China, and the aluminum resources are relatively more. This objective situation leads to a large number of aluminum cables used in the early power system, which has been gradually improved and replaced by copper cables. However, there are still some aluminum cables in some areas and power consumption occasions. The connection plate in the connection terminal assembly of most circuit breakers is made of copper. If the aluminum cable is connected to the circuit breaker, because the resistivity and the thermal expansion coefficient of aluminum are greater than those of copper, when the line current is large, the aluminum cable generates more heat and expands more; when the line current decreases, the aluminum cable shrinks, and the compression of the connection terminal to the wire gradually loosens. In this case, copper, aluminum, and some gases and water vapor in the air and other external factors form a chemical reaction site, which further affects the service life of the circuit breaker product and may cause electrical safety accidents. It is very important to solve the defects of the current circuit breaker through technical innovation to prevent safety accidents caused by unreasonable use of external wires.

[0043] Based on the above application scenario, the embodiment of the present application provides a connection terminal and an intelligent circuit breaker, which can conveniently detect the material, cross-sectional size and loosening of the compression cable during use.

[0044] The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the present application. In the description of the embodiments of the present application, unless otherwise specified, " / " represents the meaning of or, for example, A / B can represent A or B; the "and / or" in the text only describes the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which means that there are three cases of A alone, A and B together, and B alone. In addition, in the description of the embodiments of the present application, "multiple" means two or more than two.

[0045] Hereinafter, the terms "first" and "second" are only used for description purposes, and cannot be understood as implying or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined as "first" and "second" can explicitly or implicitly include one or more features. In the description of the embodiments of the present application, unless otherwise specified, the meaning of "multiple" is two or more than two.

[0046] As shown in Figures 1 to 5 The embodiment of the present application provides a connection terminal 100, which comprises a connection plate 110, a connection frame 120, a connecting sheet 130 and a connection column 140.

[0047] The terminal block 110 includes a crimping body 111 and a variable resistor 112. The crimping body 111 is slidably assembled inside the terminal frame 120 along a first direction and is used to form a terminal space in cooperation with the terminal frame 120. The variable resistor 112 is located outside the terminal frame 120 and extends along the first direction. The variable resistor 112 includes a first measuring end 1121.

[0048] The connecting piece 130 is relatively fixed to the terminal frame 120. The connecting piece 130 includes a contact point 131 and a sliding measuring end 132 electrically connected to the contact point 131. The contact point 131 is in sliding electrical connection with the variable resistor 112.

[0049] The terminal post 140 is arranged on the terminal frame 120 and is used to drive the terminal block 110 to slide relative to the terminal frame 120 and the connecting piece 130 along the first direction to synchronously adjust the size of the terminal space and the resistance value between the first measuring end 1121 and the sliding measuring end 132.

[0050] The terminal 100 is applied to a smart circuit breaker and is used to crimp a cable. Specifically, the terminal frame 120 and the terminal block 110 cooperate to form a terminal space for accommodating the cable. The crimping body 111 of the terminal block 110 can be driven by the terminal post 140 to press the incoming cable. While the terminal block 110 slides relative to the terminal frame 120 along the first direction, the variable resistor 112 synchronously slides relative to the terminal frame 120 along the first direction. The connecting piece 130 is fixed to the terminal frame 120 and moves synchronously with the terminal frame 120. The connecting piece 130 has the contact point 131 in sliding electrical connection with the variable resistor 112. To avoid the variable resistor 112 interfering with the movement of the incoming cable, the variable resistor 112 is located outside the terminal frame 120. The variable resistor 112 extends along the first direction, and when the terminal block 110 slides relative to the terminal frame 120 along the first direction, the electrical connection position of the variable resistor 112 with the contact point 131 also synchronously changes. The variable resistor 112 has the first measuring end 1121 thereon, and the terminal block 110 is provided with the sliding measuring end 132 electrically connected to the contact point 131. When the contact point 131 slides relative to the variable resistor 112 along the first direction, the resistance between the first measuring end 1121 and the sliding measuring end 132 changes, so that the material, cross-sectional size of the crimped cable when connected and whether the crimped cable is loose during use can be determined according to the resistance value between the first measuring end 1121 and the sliding measuring end 132.

[0051] In one embodiment, as shown in FIG. 1, the terminal block 110 includes a crimping body 111 and a variable resistor 112. The crimping body 111 is slidably assembled inside the terminal frame 120 along a first direction and is used to form a terminal space in cooperation with the terminal frame 120. The variable resistor 112 is located outside the terminal frame 120 and extends along the first direction. The variable resistor 112 includes a first measuring end 1121. Figure 1 and Figure 2As shown, the wiring frame 120 comprises a first side plate 121 and a second side plate 122 arranged oppositely, and a top plate 123 and a bottom plate 124 connected between the two ends of the first side plate 121 and the second side plate 122 respectively, the crimping body 111 of the wiring board 110 extends between the first side plate 121 and the second side plate 122, and the top plate 123 is threadedly connected with the wiring post 140. A plurality of crimping lines arranged perpendicularly to the length direction of the crimping cable during crimping are arranged on the side wall of the inner side of the bottom plate 124. The top plate 123 comprises a first top plate 123a and a second top plate 123b arranged in layers, and the first top plate 123a is arranged above the second top plate 123b, and the first top plate 123a and the second top plate 123b are connected with the first side plate 121 and the second side plate 122 respectively, and the second top plate 123b is provided with a threaded hole threadedly connected with the wiring post 140, and the first top plate 123a is provided with a avoiding hole avoiding the wiring post 140. The first top plate 123a and the second top plate 123b connected with the first side plate 121 and the second side plate 122 respectively are folded and laminated together, which not only facilitates the processing of the wiring frame 120, but also improves the torque bearing capacity of the wiring frame 120.

[0052] In some embodiments, the wiring frame 120 is an integrally formed structure. In one embodiment, the wiring frame 120 is formed by bending a strip-shaped plate member.

[0053] In one embodiment, as shown in Figure 2 The wiring post 140 has external threads, and the wiring frame 120 is formed with a threaded hole matched with the external threads of the wiring post 140. When the wiring post 140 is screwed into the threaded hole until abutting against the wiring board 110, the wiring post 140 can push the wiring board 110 to slide along the axial direction of the threaded hole, i.e. the first direction, relative to the wiring frame 120 as the wiring post 140 continues to be screwed into the threaded hole, thereby causing the variable resistor 112 to slide relative to the contact point 131 on the connecting sheet.

[0054] During wiring, the wiring post 140 is first rotated in the direction of unscrewing from the threaded hole to ensure that the crimping cable can be inserted into the wiring space; after the crimping cable is inserted into the wiring space, the wiring post 140 is screwed in to push the wiring board 110 to compress the crimping cable.

[0055] In one embodiment, the variable resistor 112 is in a strip-shaped structure, and the variable resistor 112 is made of an alloy material, and the resistance value can vary along the length. The contact point 131 on the connecting sheet 130 is in sliding electrical connection with the variable resistor 112, thereby forming a sliding rheostat structure of the variable resistor 112 and the connecting sheet 130. The sliding distance of the wiring board 110 relative to the wiring frame 120 along the first direction can be obtained by measuring the resistance value between the first measuring end 1121 and the sliding measuring end 132, thereby obtaining the size of the wiring space in the first direction, and further obtaining the material and cross-sectional size of the crimping cable.

[0056] When the crimping cable expands due to heat, the terminal block 140 is pushed to move towards the direction of the unscrewing threaded hole, so that the resistance value between the first measuring end 1121 and the sliding measuring end 132 changes, and thus it can be determined whether the crimping cable is loose by measuring whether the resistance value between the first measuring end 1121 and the sliding measuring end 132 changes.

[0057] In some embodiments, the variable resistor 112 is a linear resistor. The resistance value of the variable resistor 112 changes linearly along the length direction of the variable resistor 112, i.e., the first direction, that is, the resistance value between the first measuring end 1121 and the sliding measuring end 132 is proportional to the distance between the first measuring end 1121 and the contact point 131, and the measurement is simpler and convenient for subsequent data processing.

[0058] In some embodiments, as shown in Figures 6 to 9 the variable resistor 112 further includes a second measuring end 1122, and the second measuring end 1122 is oppositely arranged with the first measuring end 1121 along the first direction.

[0059] In some embodiments, as shown in Figure 6 and Figure 7 the variable resistor 112 includes opposite first and second measuring ends 1121 and 1122, and the distance between the first and second measuring ends 1121 and 1122 is the length of the variable resistor 112. The contact point 131 slides between the first and second measuring ends 1121 and 1122, and the sliding measuring end 132 is electrically connected to the contact point 131. The resistance value between the first measuring end 1121 and the sliding measuring end 132 is defined as a first resistance value, and the resistance value between the second measuring end 1122 and the sliding measuring end 132 is defined as a second resistance value. The first resistance value can be used to determine the material, cross-sectional size of the crimping cable connected to the terminal 100 and whether the crimping cable is loose. The measurement of the second resistance value can increase the accuracy of the data for determining the material, cross-sectional size of the crimping cable connected to the terminal 100 and whether the crimping cable is loose.

[0060] In some embodiments, as shown in Figure 8As shown, the crimping body 111 is in a U-shaped structure, and the crimping body 111 includes a first connecting side plate 1111, a second connecting side plate 1112, and a crimping plate 1113. The first connecting side plate 1111 and the second connecting side plate 1112 are oppositely connected to two sides of the crimping plate 1113, forming a U-shaped structure. The first connecting side plate 1111 and the second connecting side plate 1112 are used to be fixedly installed with the circuit breaker shell. The surface of the crimping plate 1113 away from the opening side of the U-shaped structure is used to contact the crimping cable. In some embodiments, the surface of the crimping plate 1113 away from the opening side of the U-shaped structure is formed with a protrusion, increasing the friction between the crimping plate 1113 and the crimping cable. The variable resistor 112 is connected to the first connecting side plate 1111, and the variable resistor 112 extends away from the opening side of the U-shaped structure.

[0061] In an embodiment, as shown in Figure 8 , and in combination with Figure 1 , the inner side surface of the first connecting side plate 1111 and the inner side surface of the variable resistor 112 are located on the same surface, and the outer side surface of the first connecting side plate 1111 and the outer side surface of the variable resistor 112 are located on the same surface. The inner side is the side facing the terminal block 120, and the outer side is the side away from the terminal block 120.

[0062] In some embodiments, as shown in Figure 6 and Figure 7 , the variable resistor 112 includes a first strip-shaped segment 1121a and a second strip-shaped segment 1122a. The first strip-shaped segment 1121a is connected to the first measurement end 1121 and is used to be electrically connected to the circuit board 200. The second strip-shaped segment 1122a is connected to the second measurement end 1122 and is used to be electrically connected to the circuit board 200.

[0063] In some embodiments, as shown in Figure 1 , the connecting piece 130 is oppositely fixed to the inner side of the terminal block 120, and is used to cooperate with the crimping body 111 to form a connecting space. When connecting, the crimping body 111 crimps the crimping cable on the connecting piece 130.

[0064] In some embodiments, the terminal block 120 includes a top plate 123 and a bottom plate 124 oppositely arranged along a first direction, and the connecting piece 130 is clamped to the bottom plate 124.

[0065] In an embodiment, as shown in Figures 10 to 12 , and in combination with Figure 1 , the connecting piece 130 is formed with a bending structure 133 at both ends. The connecting piece 130 is clamped to the bottom plate 124 through the bending structure 133, without the need for additional fixing structure.

[0066] In some embodiments, the connecting piece 130 is provided with a plurality of contact points 131, each of which is connected with the sliding measurement end 132; and at least one of the contact points 131 is in sliding electrical connection with the variable resistor 112.

[0067] In one embodiment, as shown in Figure 10 the connecting piece 130 is provided with two contact points 131, which are respectively located on two sides of the connecting piece 130. Referring to Figure 1 , when the connecting piece 130 is installed on the terminal block 120 and assembled into the terminal 100, one of the two contact points 131 is in sliding electrical connection with the variable resistor 112. It should be noted that the terminal 100 provided by the embodiments of the present application can be used as an incoming terminal 100 or as an outgoing terminal 100, and the design of the two contact points 131 can make the terminal 100 applicable to more scenarios.

[0068] In some embodiments, as shown in Figure 10 , the sliding measurement end 132 includes a protruding edge 1321 and a signal line 1322; the protruding edge 1321 is in one-piece structure with the contact point 131; and the signal line 1322 is welded to the protruding edge 1321 and is in electrical connection with the circuit board 200.

[0069] In one embodiment, as shown in Figure 10 , the sliding measurement end 132 is in one-piece structure with the connecting piece 130, wherein the protruding edge 1321 and the connecting piece 130 are made of the same plate material, and the signal line 1322 is welded to the protruding edge 1321 and is in one-piece structure with the connecting piece 130.

[0070] The terminal 100 provided by the embodiments of the present application is installed in a smart circuit breaker, the first measurement end 1121 is in electrical connection with the circuit board 200 in the smart circuit breaker through the first strip-shaped segment 1121a, the first measurement end 1121 is in electrical connection with the circuit board 200 in the smart circuit breaker through the second strip-shaped segment 1122a, and the sliding measurement end 132 is in electrical connection with the circuit board 200 in the smart circuit breaker through the signal line 1322. The terminal 100 can detect the material and cross-sectional area of the cable connected to the circuit breaker and monitor whether the cable is loosened during use of the circuit breaker. The terminal block 110 and the terminal piece form a sliding rheostat assembly on the variable resistor 112, the electrical parameters of the first measurement end 1121, the second measurement end 1122 and the sliding measurement end 132 are detected and fed back to the chip 300 of the smart circuit breaker, compared with the standard data stored in the chip 300, so as to obtain the material and cross-sectional area of the cable connected to the circuit breaker. According to the cross-sectional area information of the cable collected during installation of the smart circuit breaker, it is monitored whether the terminal 100 is loosened.

[0071] As shown in Figures 13 to 17As shown, the embodiment of the present application further provides a smart circuit breaker, comprising a circuit board 200, a chip 300, and the terminal 100 according to any one of the embodiments of the first aspect;

[0072] The first measuring end 1121, the second measuring end 1122, and the sliding measuring end 132 of the terminal 100 are electrically connected with the circuit board 200, and the chip 300 is electrically connected with the circuit board 200;

[0073] The chip 300 is configured to determine whether the connected cable is loose according to the resistance value between the first measuring end 1121 and the sliding measuring end 132.

[0074] In one embodiment, the chip 300 comprises a collection unit, a processing unit, and a storage unit; the collection unit is configured to collect a first resistance value between the first measuring end 1121 and the sliding measuring end 132; the processing unit is signal-connected with the collection unit and the storage unit, and is configured to compare the first resistance value with a database in the storage unit to determine the material of the connected cable and measure the cross-sectional area of the cable, so as to avoid electrical safety accidents caused by improper use of the cable material, and to monitor the cross-sectional area of the cable in real time to avoid electrical safety accidents caused by loose crimping of the cable.

[0075] In another embodiment, the collection unit is further configured to collect a second resistance value between the second measuring end 1122 and the sliding measuring end 132. By collecting the electrical parameters at the three measuring ends, the material of the connected cable can be accurately identified, the cross-sectional area of the cable can be measured, electrical safety accidents caused by improper use of the cable material can be avoided, the cross-sectional area of the cable can be monitored in real time to avoid electrical safety accidents caused by loose crimping of the cable, and the smart circuit breaker itself has the protection functions of overload, short circuit, high temperature, overvoltage, and undervoltage, thereby providing all-round protection for electrical safety.

[0076] In some embodiments, as shown, Figure 17 The smart circuit breaker further comprises an alarm 400;

[0077] The alarm 400 is signal-connected with the chip 300.

[0078] The smart circuit breaker provided by the embodiment of the present application is re-designed by the terminal 100, a plurality of measuring ends are arranged in the wiring space where the cable is connected, the cross-sectional size of the connected cable is detected, the cable material is compared and analyzed, and whether the cable crimping is loose during the use of the circuit breaker can be monitored in real time. The communication function of the smart circuit breaker is used for alarm and reminder.

[0079] It should be noted that the resistance value of the smart circuit breaker is calibrated before use according to the cables with known materials and cross-sectional sizes, a database is formed and stored in the storage unit, thereby facilitating subsequent intelligent detection and determination.

[0080] It will be apparent to those skilled in the art that various modifications and variations can be made to the present application without departing from the spirit or scope of the application. Thus, it is intended that the present application cover the modifications and variations of this application provided they come within the scope of the appended claims and their equivalents.

Claims

1. A terminal block, characterized in that, The application relates to a terminal, which comprises a terminal plate, a terminal frame, a connecting sheet and a terminal post. The terminal plate comprises a wire pressing body and a variable resistor, the wire pressing body is slidably arranged in the terminal frame along a first direction and is used for forming a terminal space in cooperation with the terminal frame, the variable resistor is arranged outside the terminal frame and extends along the first direction, and the variable resistor comprises a first measuring end. The connecting sheet is fixed relative to the terminal frame, the connecting sheet comprises a contact point and a sliding measuring end electrically connected with the contact point, and the contact point is slidably electrically connected with the variable resistor. The terminal post is arranged on the terminal frame and is used for driving the terminal plate to slide relative to the terminal frame and the connecting sheet along the first direction so as to synchronously adjust the size of the terminal space and the resistance value between the first measuring end and the sliding measuring end. The variable resistor is a linear resistor.

2. The terminal of claim 1 wherein, The variable resistor further comprises a second measuring end, and the second measuring end is arranged opposite to the first measuring end along the first direction.

3. The terminal of claim 1 or 2, wherein The connecting sheet is fixed relative to the inside of the terminal frame and is used for forming the terminal space in cooperation with the wire pressing body.

4. The terminal of claim 3 wherein, The terminal frame comprises a top plate and a bottom plate arranged opposite along the first direction, and the connecting sheet is clamped on the bottom plate.

5. The terminal of claim 4 wherein, The connecting sheet is provided with a plurality of contact points, the plurality of contact points are all connected with the sliding measuring end, and at least one contact point is slidably electrically connected with the variable resistor.

6. The terminal of claim 1 wherein, The variable resistor comprises a first strip-shaped section and a second strip-shaped section, the first strip-shaped section is connected with the first measuring end and is used for being electrically connected with a circuit board, and the second strip-shaped section is connected with the second measuring end and is used for being electrically connected with the circuit board.

7. The terminal of claim 3 wherein: The sliding measuring end comprises a convex edge and a signal line, the convex edge is an integral structure with the contact point, and the signal line is welded on the convex edge and is used for being electrically connected with the circuit board.

8. The wiring terminal according to claim 1, characterized by The application further relates to a circuit board, a chip and the terminal.

9. An intelligent circuit breaker comprising: The first measuring end, the second measuring end and the sliding measuring end of the terminal are all electrically connected with the circuit board, the chip is electrically connected with the circuit board, and the chip is used for judging whether a cable connected with the terminal is loose according to the resistance value between the first measuring end and the sliding measuring end. The intelligent circuit breaker further comprises an alarm. The alarm is signal-connected with the chip.

10. The intelligent circuit breaker of claim 9, wherein, ​ ​

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