Electric leakage test device and circuit breaker

Abstract

A test button of the electric leakage test device is arranged on the circuit breaker in a sliding mode, a test loop is matched with an electric leakage tripping device in the circuit breaker, one electricity taking end of an electronic assembly plate of the electric leakage tripping device is connected to a main circuit of the circuit breaker, and a mutual inductor is connected to the electronic assembly plate. The test loop comprises a button elastic piece and an electricity-taking elastic piece, a first elastic arm of the button elastic piece is matched with the test button and forms a breakpoint of the test loop with the electricity-taking elastic piece, a second elastic arm of the button elastic piece penetrates through a center hole of the mutual inductor to be connected with the electronic component board, and a first electricity-taking arm of the electricity-taking elastic piece is connected with the electronic component board; and the second power taking arm of the power taking elastic piece is used as the other power taking end of the electronic component board and is inserted into the main circuit of the circuit breaker. According to the utility model, the button elastic member and the electricity-taking elastic member form a test loop, and the second elastic arm of the button elastic member directly passes through the center hole of the mutual inductor and is connected with the electronic assembly board, thereby facilitating automatic assembly.

Description

Technical Field

[0001] The utility model relates to the field of low-voltage electrical appliances, in particular to a leakage test device and a circuit breaker. Background Art

[0002] Low-voltage circuit breakers can be used to distribute electrical energy and protect circuits and power equipment from overload and short circuit. They can also be used for infrequent switching of circuits and infrequent starting of motors. Existing low-voltage circuit breakers usually have a leakage protection function, that is, a leakage test device is configured in the low-voltage circuit breaker. By periodically pressing the test button to connect the test circuit, it is possible to determine whether the leakage protection function can be used normally. The test circuit generally uses a soft wire that passes through the zero-sequence transformer and is connected to the electronic component board, and a mechanical breakpoint is set on the soft wire as the breakpoint of the leakage test circuit. However, due to the characteristics of the soft wire and the internal structure of the product, this connection structure makes it impossible for the leakage test circuit to form a modular structure, resulting in the inability to realize automated production of leakage circuit breakers. Summary of the invention

[0003] The utility model aims to overcome at least one defect of the prior art and provide a leakage test device and a circuit breaker.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] The utility model provides a leakage test device, including a test button and a test circuit, wherein the test button is slidably arranged on a circuit breaker, and the test circuit cooperates with a leakage tripping device inside the circuit breaker, wherein the leakage tripping device comprises an electronic component board and a mutual inductor, wherein a power-taking end of the electronic component board is connected to a main circuit of the circuit breaker, and the mutual inductor is connected to the electronic component board, and the test circuit comprises a button elastic member and a power-taking elastic member, wherein a first elastic arm of the button elastic member cooperates with the test button, and a breakpoint of the test circuit is formed by the contact portion of the first elastic arm and the power-taking elastic member being spaced apart from each other, and a second elastic arm of the button elastic member passes through a central hole of the mutual inductor and is connected to the electronic component board, and a first power-taking arm of the power-taking elastic member is connected to the electronic component board, and a second power-taking arm of the power-taking elastic member is inserted into the main circuit of the circuit breaker as another power-taking end of the electronic component board to form a circuit.

[0006] Preferably, a mounting portion is provided inside the circuit breaker, the central hole of the transformer is sleeved outside the mounting portion, and the second elastic arm of the button elastic member passes through a gap between the mounting portion and the wall of the central hole of the transformer.

[0007] Preferably, a slot is provided at an edge of the electronic component board, the opening of the slot faces the mounting portion, and the second elastic arm is limited by the edge of the mounting portion cooperating with the slot.

[0008] Preferably, the button elastic member is a torsion spring, and the button elastic member includes a twisting portion, and the twisting portion is rotatably arranged inside the circuit breaker, and both ends of the twisting portion extend outward to form a first elastic arm and a second elastic arm, respectively, the middle portion of the first elastic arm abuts against the test button, and the end of the first elastic arm is bent to form an abutting portion, and the abutting portion and the contact portion are spaced relative to each other to form a breakpoint of the test circuit, and the end of the second elastic arm is bent and extended to form a plug-in portion, and the plug-in portion passes through the center hole of the transformer and is plugged into the electronic component board.

[0009] Preferably, the power-taking elastic member includes two elastic rods arranged in parallel, one ends of the two elastic rods are connected to form a contact portion, the middle parts of the two elastic rods are bent in the same direction to form a limiting portion, and the other ends of the two elastic rods are bent and extended in a direction away from the contact portion to form a first power-taking arm and a second power-taking arm, the first power-taking arm extends in a direction close to the electronic component board, and the second power-taking arm extends in a direction away from the electronic component board.

[0010] Preferably, a conductive plate is connected to the main line of the circuit breaker, a bayonet is provided at the edge of the conductive plate, and the second power taking arm of the power taking elastic member is snapped into the bayonet.

[0011] Preferably, the circuit breaker is provided with a button hole, the test button is slidably arranged in the button hole, the contact portion extends along the inner side of the button hole close to the side of the electronic component board, and the abutment portion of the button elastic member is spaced relative to the contact portion in the button hole to form a breakpoint of the test circuit.

[0012] Preferably, the circuit breaker main circuit is divided into an N-phase circuit and at least one L-phase circuit, and the electronic component board is connected to an L-phase circuit and an N-phase circuit via a power-taking elastic member and a wire connected to the electronic component board.

[0013] Preferably, the test circuit comprises a first breakpoint and a second breakpoint connected in series, the first elastic arm and the contact portion are spaced apart from each other to form the first breakpoint, and the second breakpoint is controlled by the leakage tripping device.

[0014] Preferably, the second breakpoint is arranged on the power taking elastic member, the second breakpoint is located between the contact portion and the first power taking arm, or the second breakpoint is located between the contact portion and the second power taking arm.

[0015] The utility model also provides a circuit breaker, comprising at least one circuit breaker pole and a trip pole, wherein the above-mentioned leakage test device and leakage trip device are arranged in the trip pole.

[0016] Furthermore, the leakage tripping device also includes a tripper and a tripping assembly, the tripping assembly includes a push plate and a tripping button, an indication hole is opened on the shell of the tripping pole, the tripping button is slidably arranged in the indication hole, the push plate is rotatably arranged on one side of the top rod of the tripper, a reset member is arranged between the tripping button and the shell of the tripping pole, pressing the tripping button can limit the tripping button and the push plate to each other inside the tripping pole, when a leakage fault occurs, the top rod of the tripper drives the push plate to rotate, the push plate triggers the operating mechanism of the circuit breaker pole to trip, the push plate and the tripping button are released from the limit, and the reset member drives the tripping button to pop out to indicate the occurrence of a leakage fault.

[0017] Furthermore, the test circuit is also provided with a second breakpoint. When the trip button and the push plate are limited, the trip button closes the second breakpoint. When the trip button and the push plate are released from the limit so that the trip button pops out, the second breakpoint is disconnected.

[0018] Furthermore, the push plate triggers the tripping by pushing the lock of the operating mechanism of the circuit breaker pole, and when the push plate releases the limit cooperation with the trip button, it presses against the lock, so that the operating mechanism cannot automatically reset to perform the closing operation; when the trip button and the push plate limit cooperation, the push plate releases the limit on the lock so that the operating mechanism can perform the closing operation.

[0019] The leakage test device and circuit breaker of the utility model form a test circuit by a button elastic member and a power-taking elastic member. The second elastic arm of the button elastic member directly passes through the central hole of the mutual inductor and is connected to the electronic component board. The number of parts forming the test circuit is small. The button elastic member and the power-taking elastic member both adopt a plug-in power-taking connection method, which is conducive to forming a modular structure compared with the use of soft wire connection, convenient for automated assembly, and conducive to grasping and installation of the assembly device.

[0020] In addition, the second elastic arm is limited at the lower position by the cooperation of the slot and the mounting portion. When the test button is pressed to deform the button elastic part, the slot ensures the connection between the second elastic arm and the electronic component board. During the deformation of the test button, the mounting portion provides a force point for the second elastic arm to avoid damage to the electronic component board and affect its service life.

[0021] In addition, a snap-in is provided at the edge of the conductive plate to facilitate snapping with the first power-taking arm of the power-taking elastic member. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the circuit breaker in the utility model;

[0023] Figure 2 It is a schematic diagram of the structure inside the tripping pole in the utility model;

[0024] Figure 3It is a schematic diagram of the structure of the leakage test device and the tripping device in the utility model;

[0025] Figure 4 It is a structural schematic diagram of the button elastic member in the utility model;

[0026] Figure 5 It is a structural schematic diagram of the electric-taking elastic member in the utility model;

[0027] Figure 6 It is a structural schematic diagram of the electronic component board in the utility model;

[0028] Reference numerals:

[0029] 1-test button, 2-button elastic part, 20-twisting part, 21-first elastic arm, 211-abutting part, 22-second elastic arm, 221-plug-in part, 3-power-taking elastic part, 301-contact part, 302-limiting part, 31-first power-taking arm, 32-second power-taking arm, 4-transformer, 5-electronic component board, 51-card slot, 52-jack, 6-conductive plate, 61-bayonet, 7-tripping device, 71-tripping device, 72-push plate, 73-tripping button, 8-housing of tripping pole, 81-button hole, 82-installation part, A-circuit breaker pole, B-tripping pole. DETAILED DESCRIPTION

[0030] The following embodiments are combined with the accompanying drawings to further illustrate the specific implementation of the leakage test device and circuit breaker of the utility model. The leakage test device and circuit breaker of the utility model are not limited to the description of the following embodiments.

[0031] like Figure 1 As shown, the circuit breaker includes at least one circuit breaker pole A and a tripping pole B, each circuit breaker pole A includes an operating mechanism, a contact mechanism and an arc extinguishing mechanism, wherein the operating mechanism is used to drive the contact mechanism to open and close, thereby disconnecting or connecting the main line of the circuit breaker pole A, and the arc extinguishing mechanism is arranged on one side of the contact mechanism to cooperate in extinguishing the arc generated by the contact mechanism breaking; the tripping pole B includes a leakage tripping device, which includes an electronic component board 5, a mutual inductor 4 and a tripping device 7. The electronic component board 5 is provided with a controller. The main lines of each phase of the circuit breaker pass through the central hole of the mutual inductor 4, and the mutual inductor 4 is connected to the electronic component board 5. The tripping device 7 includes a tripping device 71 and a tripping assembly that cooperate with each other. The mutual inductor 4 collects the current signals of the main lines of each phase. The controller of the electronic component board 5 drives the tripping device 71 according to the current signal fed back by the mutual inductor 4. The tripping device 71 acts to drive the tripping assembly to trigger the operating mechanism of the circuit breaker pole A to trip.

[0032] A leakage test device is also provided in the trip pole B, which includes a test button 1 and a test circuit. The test button 1 is slidably provided on the trip pole B. The test button 1 is operated to connect or disconnect the breakpoint of the test circuit. The test circuit passes through the center hole of the transformer 4. When the transformer 4 collects the simulated leakage current of the test circuit, the controller drives the trip device 71 to drive the trip component to trigger the operating mechanism of the circuit breaker pole A to trip.

[0033] Specifically, the test circuit includes a button elastic member 2 and a power-taking elastic member 3, both of which are made of conductive materials. The first elastic arm 21 of the button elastic member 2 cooperates with the test button 1, and the first elastic arm 21 and the contact portion 301 of the power-taking elastic member 3 are spaced relative to each other to form a breakpoint of the test circuit. A section of soft wire is connected between the second elastic arm 22 of the button elastic member 2 and the electronic component board 5, and the soft wire passes through the center hole of the transformer 4. Usually, the power-taking elastic member 3 is connected to the main circuit of the circuit breaker as a power-taking end of the electronic component board 5, that is, the first power-taking arm 31 of the power-taking elastic member 3 is connected to the electronic component board 5, and a socket 52 for plugging the first power-taking arm 31 is correspondingly opened on the electronic component board 5. A power-taking end of the electronic component board 5 (usually a section of wire connected to the electronic component board 5) and the second power-taking arm 32 of the power-taking elastic member 3 are connected to the main circuit as the other power-taking end of the electronic component board 5.

[0034] The improvement of the present application is that the second elastic arm 22 of the button elastic member 2 passes through the center hole of the transformer 4 and is plugged into the electronic component board 5, the first power taking arm 31 of the power taking elastic member 3 is connected to the electronic component board 5, and the second power taking arm 32 of the power taking elastic member 3 serves as another power taking end of the electronic component board 5 and is plugged into the main line of the circuit breaker to form a loop.

[0035] In this way, a test circuit is formed by the button elastic member 2 and the power-taking elastic member 3, and the second elastic arm 22 of the button elastic member 2 directly passes through the center hole of the transformer 4 and is connected to the electronic component board 5. The number of parts forming the test circuit is small, and the second elastic arm 22 of the button elastic member 2 directly passes through the center hole of the transformer 4. The button elastic member 2 and the power-taking elastic member 3 both adopt a plug-in power connection method, which is conducive to forming a modular structure compared to the use of soft wire connection, convenient for automated assembly, and conducive to grasping and installation of the assembly device.

[0036] Further, such as Figure 2As shown, a mounting portion 82 is provided inside the circuit breaker, and the mounting portion 82 is used to assemble the transformer 4, that is, the center hole of the transformer 4 is sleeved on the outside of the mounting portion 82, and the second elastic arm 22 of the button elastic member 2 is arranged to penetrate along the gap between the mounting portion 82 and the wall of the center hole of the transformer 4. When the test button 1 is pressed to deform the button elastic member 2, the mounting portion 82 provides a force point for the second elastic arm 22 to avoid damage to the electronic component board 5 and affect the service life; preferably, a card slot 51 is provided on the edge of the electronic component board 5, and the opening of the card slot 51 faces the mounting portion 82, and the edge of the mounting portion 82 cooperates with the card slot 51 to limit the second elastic arm 22, and the card slot 51 ensures the connection between the second elastic arm 22 and the electronic component board 5.

[0037] Combination Figure 1-6 A specific embodiment of a circuit breaker is provided.

[0038] like Figure 1 As shown, the circuit breaker includes a circuit breaker pole A and a trip pole B arranged in parallel, at least two-phase main lines are arranged in the shell of the circuit breaker pole A, one of which is an N-phase line, and the other main lines are L-phase lines. The circuit breaker pole A can adopt the existing technology, that is, pairs of wiring terminals are arranged in the shell of the circuit breaker, and one-phase main line is connected between each pair of wiring terminals; the paired wiring terminals are respectively arranged at both ends of the shell of the circuit breaker pole A, and an operating mechanism, a contact mechanism and an arc extinguishing mechanism are arranged in the middle of the shell of the circuit breaker pole A, wherein the operating mechanism is drivingly connected to the moving contact in the contact mechanism, the static contact is fixedly arranged and spaced opposite to the moving contact, the moving contact and the static contact are respectively electrically connected to the adjacent wiring terminals, the moving contact is driven by the operating mechanism to contact or separate with the static contact, so as to control the contact or disconnection of the main line through the contact mechanism, and the arc extinguishing mechanism is arranged on one side of the contact mechanism, and the operating mechanism, the contact mechanism and the arc extinguishing mechanism adopt the existing technology.

[0039] like Figure 2-3 As shown, a leakage tripping device and a leakage test device are arranged in the housing 8 of the tripping pole B, and the leakage tripping device comprises an electronic component board 5, a mutual inductor 4 and a tripping device 7, wherein the electronic component board 5 is arranged in the middle of the housing 8 of the tripping pole B, and the two power-taking ends of the electronic component board 5 are respectively connected to the L-phase line and the N-phase line for power taking; the mutual inductor 4 is correspondingly arranged at the corners of the electronic component board 5, Figure 2 , 3 In the figure, the mutual inductor 4 is arranged at the lower left corner of the electronic component board 5, and the main lines of each phase of the circuit breaker pole A can pass through the center hole of the mutual inductor 4. A protruding mounting portion 82 is arranged inside the housing 8 of the trip pole B. The mounting portion 82 preferably forms an arc-shaped protruding structure in the shape of a circular arc or a circular ring, so that the center hole of the mutual inductor 4 can be sleeved on the outside of the mounting portion 82. The electronic component board 5 forms an avoidance zone at the portion corresponding to the center hole of the mutual inductor 4. Further, as Figure 2 , 6 As shown, a slot 51 is formed at the edge of the electronic component board 5 , and the opening of the slot 51 faces the mounting portion 82 .

[0040] The trip device 7 is arranged on one side of the electronic component board 5, and the trip device 7 cooperates with the operating mechanism of the circuit breaker pole A through a linkage rod. Figure 2 , 3 In the embodiment, the tripping device 7 is arranged on the upper side of the electronic component board 5. The tripping device 7 can adopt the existing technology. For example, the tripping device 7 includes a tripping device 71 and a tripping assembly. The tripping device 71 can be an electromagnetic tripping device. The tripping device 71 is connected to the electronic component board 5. The tripping assembly includes a push plate 72 and a tripping button 73. The push plate 72 is rotatably arranged on one side of the tripping device 71. The tripping button 73 is slidably arranged on the housing 8 of the tripping pole B. Figure 2 In the embodiment, an indication hole is provided on the upper part of the housing 8 of the trip pole B, and the trip button 73 is slidably arranged in the indication hole. One end of the trip button 73 can pop up from the indication hole to indicate the occurrence of a trip fault. The other end of the trip button 73 is located on one side of the tripper 71 and the push plate 72. A reset member is arranged between the trip button 73 and the housing 8 of the trip pole B. When no leakage fault occurs, the push plate 72 and one end of the trip button 73 are mutually limited. When a leakage fault occurs, the push rod drives the push plate 72 to rotate, and the push plate 72 pushes the linkage rod to trigger the tripping of the operating mechanism of the circuit breaker pole A. The push plate 72 and the trip button 73 are released from the limit, and the reset member drives the trip button 73 to pop up to indicate the occurrence of a leakage fault. When a leakage fault occurs, the push plate 72 trips the circuit breaker by pushing the lock of the operating mechanism. At the same time, under the action of the reset member, the trip button 73 drives the push plate 72 to abut against the lock, so that the operating mechanism cannot be automatically reset to perform the closing operation. After the leakage fault is removed, the trip button 73 is pressed again to make the trip button 73 overcome the elastic force of the reset member and re-limit with the push plate 72. At this time, the trip button 73 is completely retracted into the housing, and the push plate 72 releases the limit on the lock. The operating mechanism can close the switch normally, which can improve safety and prevent users from arbitrarily closing the switch after the leakage fault. The leakage test device is set on one side of the leakage trip device, such as Figure 2 , 3 As shown, the leakage test device includes a test button 1 and a test circuit. The test button 1 is slidably set on the shell 8 of the trip pole B. A button hole 81 is opened on the upper part of the shell 8 of the trip pole B. The test button 1 is slidably set in the button hole 81. One end of the test button 1 extends out of the shell 8 of the trip pole B from the button hole 81, and the other end of the test button 1 is used to connect or disconnect the power supply of the test circuit.

[0041] In this embodiment, the test circuit includes a button elastic member 2 and a power-taking elastic member 3. The first elastic arm 21 of the button elastic member 2 cooperates with the test button 1. The first elastic arm 21 of the button elastic member 2 and the contact portion 301 of the power-taking elastic member 3 are spaced relative to each other to form a breakpoint of the test circuit. The second elastic arm 22 of the button elastic member 2 passes through the gap between the mounting portion 82 and the central hole wall of the transformer 4 and is plugged into the electronic component board 5. Preferably, the second elastic arm 22 of the button elastic member 2 is clamped in the clamping slot 51 of the electronic component board 5, and the mounting portion 82 is clamped with the The card slot 51 cooperates with the limiting second elastic arm 22 to ensure the connection with the electronic component board 5 and avoid damage to the electronic component board 5; the first power taking arm 31 of the power taking elastic member 3 is plugged into the electronic component board 5, and the second power taking arm 32 of the power taking elastic member 3 is plugged into the conductive plate 6 connected to the one-phase main line. At this time, the second power taking arm 32 of the power taking elastic member 3 is equivalent to a power taking end of the electronic component board 5. It can also be understood that the electronic component board 5 is connected to the L-phase line and the N-phase line through the power taking elastic member 3 and the wire connected to the electronic component board 5.

[0042] Preferably, the conductive plate 6 is connected to the wiring terminal, and a slot 61 is provided on the edge of the conductive plate 6 to facilitate the second power taking arm 32 of the power taking elastic member 3 to be inserted into the slot 61. The button elastic member 2 and the power taking elastic member 3 are preferably made of a conductive material with a certain elasticity. Compared with the existing soft wires, their shapes have the advantage of fixed shape. Electrical connection is achieved by plugging, which is convenient for wiring and conducive to modularization.

[0043] Combination Figure 2-4 A structure of a button elastic member 2 of the present embodiment is provided. In the figure, the button elastic member 2 is a torsion spring. The button elastic member 2 includes a twisting portion 20. The twisting portion 20 is rotatably arranged inside the circuit breaker. An axial protrusion is protruded inside the housing 8 of the trip pole B. The twisting portion 20 is sleeved on the axial protrusion. The two ends of the twisting portion 20 extend outward to form a first elastic arm 21 and a second elastic arm 22. The middle part of the first elastic arm 21 abuts against one end of the test button 1 located in the button hole 81. The first elastic arm 21 is The end of the arm 21 is bent to form an abutment portion 211, and the abutment portion 211 has a certain length so that the abutment portion 211 and the contact portion 301 can be spaced relative to each other to form a breakpoint of the test circuit. The end of the second elastic arm 22 is bent and extended to form a plug-in portion 221, and the plug-in portion 221 passes through the central hole of the transformer 4, and the plug-in portion 221 is clamped between the slot 51 and the mounting portion 82 and plugged with the electronic component board 5. In the figure, the extension direction of the abutment portion 211 and the plug-in portion 221 is preferably parallel to the central axis of the transformer 4.

[0044] Combination Figure 2 , 35 provides a structure of a power-taking elastic member 3 applied to the present embodiment, the power-taking elastic member 3 comprises two elastic rods arranged in parallel, one ends of the two elastic rods are connected to form a contact portion 301, the contact portion 301 extends along the inner side of the button hole 81 close to the side of the electronic component board 5, the middle parts of the two elastic rods are bent in the same direction to form a limiting portion 302, the limiting portion 302 can be abutted against the inside of the shell 8 of the tripping pole B for limiting, in the figure, the limiting portion 302 abuts against a step-shaped protrusion, thereby limiting the power-taking elastic member 3; the other ends of the two elastic rods are bent and extended in a direction away from the contact portion 301 to form a first power-taking arm 31 and a second power-taking arm 32, the first power-taking arm 31 extends in a direction close to the electronic component board 5, the second power-taking arm 32 extends in a direction close to the conductive plate 6, and the second power-taking arm 32 can be snapped into the snap-in 61 at the edge of the conductive plate 6.

[0045] Preferably, as a preferred embodiment, the test circuit is also provided with a second breakpoint, and the second breakpoint is connected in series with the first breakpoint for jointly controlling the connection and disconnection of the test circuit, wherein the second breakpoint is controlled to be connected or disconnected by the leakage tripping device. Specifically, the second breakpoint is arranged on the power-taking elastic member 3, and the second breakpoint is located between the contact portion 301 and the first power-taking arm 31, or the second breakpoint is located between the contact portion 301 and the second power-taking arm 32. At this time, the power-taking elastic member 3 can be understood as a split structure, and the second breakpoint is closed when the trip button 73 and the push plate 72 are limitedly matched. At this time, the test button 1 is pressed to close the breakpoint formed by the abutting portion 211 and the contact portion 301, which can also be called the first breakpoint, so that the test circuit can be turned on. When a leakage fault occurs, the top rod of the release 71 drives the push plate 72 and the trip button 73 to release the limit, and when the reset member drives the trip button 73 to pop out, the second breakpoint is automatically disconnected; by setting two breakpoints, one is driven to close by the test button 1, and the other is driven by the trip button 73, it is possible to avoid long-term charging of the test circuit to damage the circuit.

[0046] It should be noted that in the description of the present invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate directions or positional relationships based on directions or positional relationships shown in the drawings, or directions or positional relationships that are usually placed when in use, and are only for the convenience of description, rather than indicating that the device or element referred to must have a specific direction, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish descriptions, and cannot be understood as indicating relative importance.

[0047] The above contents are further detailed descriptions of the present invention in combination with specific preferred implementations, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A leakage test device, comprising a test button (1) and a test circuit, wherein the test button (1) is slidably arranged on a circuit breaker, the test circuit cooperates with a leakage tripping device inside the circuit breaker, the leakage tripping device comprises an electronic component board (5) and a mutual inductor (4), one power-taking end of the electronic component board (5) is connected to a main circuit of the circuit breaker, the mutual inductor (4) is connected to the electronic component board (5), the test circuit comprises a button elastic member (2) and a power-taking elastic member (3), a first elastic arm (21) of the button elastic member (2) cooperates with the test button (1), and a breakpoint of the test circuit is formed by the first elastic arm (21) and a contact portion (301) of the power-taking elastic member (3) being spaced relative to each other, characterized in that: The second elastic arm (22) of the button elastic member (2) passes through the central hole of the transformer (4) and is connected to the electronic component board (5); the first power-taking arm (31) of the power-taking elastic member (3) is connected to the electronic component board (5); and the second power-taking arm (32) of the power-taking elastic member (3) serves as another power-taking end of the electronic component board (5) and is plugged into the main circuit of the circuit breaker to form a loop.

2. The leakage test device according to claim 1, characterized in that: A mounting portion (82) is provided inside the circuit breaker, the central hole of the mutual inductor (4) is sleeved outside the mounting portion (82), and the second elastic arm (22) of the button elastic member (2) passes through a gap between the mounting portion (82) and the wall of the central hole of the mutual inductor (4).

3. The leakage test device according to claim 2, characterized in that: A slot (51) is provided on the edge of the electronic component board (5), the opening of the slot (51) faces the mounting portion (82), and the second elastic arm (22) is limited by the cooperation between the edge of the mounting portion (82) and the slot (51).

4. The leakage test device according to claim 1, characterized in that: The button elastic member (2) is a torsion spring. The button elastic member (2) comprises a twisting portion (20). The twisting portion (20) is rotatably arranged inside the circuit breaker. The two ends of the twisting portion (20) extend outwards to form a first elastic arm (21) and a second elastic arm (22). The middle of the first elastic arm (21) abuts against the test button (1). The end of the first elastic arm (21) is bent to form an abutting portion (211). The abutting portion (211) and the contact portion (301) are spaced apart from each other to form a breakpoint of the test circuit. The end of the second elastic arm (22) is bent and extended to form a plug-in portion (221). The plug-in portion (221) passes through the center hole of the transformer (4) and is plugged into the electronic component board (5).

5. The leakage test device according to claim 1, characterized in that: The power-taking elastic member (3) comprises two elastic rods arranged in parallel, one end of the two elastic rods are connected to form a contact portion (301), the middle portions of the two elastic rods are bent in the same direction to form a limit portion (302), and the other ends of the two elastic rods are bent and extended in a direction away from the contact portion (301) to form a first power-taking arm (31) and a second power-taking arm (32), respectively, the first power-taking arm (31) extends in a direction close to the electronic component board (5), and the second power-taking arm (32) extends in a direction away from the electronic component board (5).

6. The leakage test device according to claim 1, characterized in that: A conductive plate (6) is connected to the main circuit of the circuit breaker, a bayonet (61) is provided on the edge of the conductive plate (6), and the second power taking arm (32) of the power taking elastic member (3) is bayoneted in the bayonet (61).

7. The leakage test device according to claim 1, characterized in that: The circuit breaker is provided with a button hole (81), the test button (1) is slidably arranged in the button hole (81), the contact portion (301) extends along the inner side of the button hole (81) close to the side of the electronic component board (5), and the abutment portion (211) of the button elastic member (2) is spaced relative to the contact portion (301) in the button hole (81) to form a breakpoint of the test circuit.

8. The leakage test device according to claim 1, characterized in that: The circuit breaker main circuit is divided into an N-phase circuit and at least one L-phase circuit, and the electronic component board (5) is connected to an L-phase circuit and an N-phase circuit via a power-taking elastic member (3) and a wire connected to the electronic component board (5).

9. The leakage test device according to claim 1, characterized in that: The test circuit comprises a first breakpoint and a second breakpoint connected in series, the first elastic arm (21) and the contact portion (301) are spaced apart from each other to form the first breakpoint, and the second breakpoint is controlled by the leakage tripping device.

10. The leakage test device according to claim 9, characterized in that: The second breakpoint is arranged on the power taking elastic member (3), and the second breakpoint is located between the contact portion (301) and the first power taking arm (31), or the second breakpoint is located between the contact portion (301) and the second power taking arm (32).

11. A circuit breaker comprising at least one circuit breaker pole (A) and one trip pole (B), characterized in that: The tripping pole (B) is provided with a leakage test device and a leakage tripping device as described in any one of claims 1 to 10.

12. The circuit breaker according to claim 11, characterized in that: The leakage tripping device also includes a tripper (71) and a tripping assembly, wherein the tripping assembly includes a push plate (72) and a tripping button (73). An indication hole is provided on the housing (8) of the tripping pole (B), and the tripping button (73) is slidably arranged in the indication hole. The push plate (72) is rotatably arranged on one side of the top rod of the tripper (71), and a reset member is arranged between the tripping button (73) and the housing (8) of the tripping pole (B). Pressing the tripping button (73) can limit the tripping button (73) and the push plate (72) to each other inside the tripping pole (B). When a leakage fault occurs, the top rod of the tripper (71) drives the push plate (72) to rotate, and the push plate (72) triggers the operating mechanism of the circuit breaker pole (A) to trip, and the push plate (72) and the tripping button (73) are released from the limit, and the reset member drives the tripping button (73) to pop out to indicate the occurrence of a leakage fault.

13. The circuit breaker according to claim 12, characterized in that: The test circuit is also provided with a second breakpoint. When the trip button (73) and the push plate (72) are in limited position cooperation, the trip button (73) closes the second breakpoint. When the trip button (73) and the push plate (72) are released from limited position so that the trip button (73) pops out, the second breakpoint is disconnected.

14. The circuit breaker according to claim 13, characterized in that: The push plate (72) triggers the tripping by pushing the lock of the operating mechanism of the circuit breaker pole (A), and when the push plate (72) releases the limit fit with the trip button (73), it abuts against the lock, so that the operating mechanism cannot automatically reset to perform the closing operation; when the trip button (73) and the push plate (72) are in limit fit, the push plate (72) releases the limit fit on the lock so that the operating mechanism can perform the closing operation.

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