Testing device and residual current operated circuit breaker

Abstract

The testing device comprises a testing button and a conductive elastic piece, the testing button is arranged on the shell in a sliding mode, the conductive elastic piece comprises a conductive part and a first elastic arm, the conductive part is directly and electrically connected with the electronic assembly board, and when the testing button moves to the testing position from the initial position, the first elastic arm can be driven to make contact with the first wiring board; the first elastic arm is used for driving the test button to reset from the test position to the initial position. The residual current operated circuit breaker comprises a shell and a residual current module, and the residual current module comprises an electronic component board, a zero sequence mutual inductor, a residual current operated release and a testing device. According to the testing device and the residual current operated circuit breaker, the conductive elastic piece serves as a conductive piece between the electronic component board and the first wiring board and also serves as a reset piece of the testing button, parts are reduced, the conductive elastic piece is directly and electrically connected with the electronic component board, and the testing efficiency is improved. Power taking of the electronic assembly board is realized through contact with the first wiring board in the main loop, and conductive connection points are reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of low voltage electrical apparatus, concretely relates to a testing device and residual current operating circuit breaker. BACKGROUND

[0002] The existing residual current operating circuit breaker is composed of a protection pole (also called L pole) and a non-protected neutral pole (also called N pole), and the residual current operating module is placed in the neutral pole, which results in a compact space in the neutral pole, and other mechanisms in the pole, such as a testing device for realizing the residual current operating test function, can occupy a very limited space. The existing testing device has a complex structure, and not only is the test function unreliable, but also occupies a large space, further squeezing the space of other mechanisms, affecting the performance of the circuit breaker.

[0003] In addition, the existing residual current operating circuit breaker cannot place an independent operating mechanism in the neutral pole, and the contacts of the neutral pole are closed by the mechanism of the protection pole through a connecting rod, and the stability of the contact closure is poor, affecting the service life of the product. SUMMARY

[0004] The utility model aims at overcoming at least one defect of the prior art, and provides a testing device and residual current operating circuit breaker.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] The testing device comprises a test button and a conductive elastic piece, the test button is slidingly arranged on the shell and can move between an initial position and a test position, the conductive elastic piece comprises a conductive part and a first elastic arm, the conductive part is directly electrically connected with an electronic component board, the first elastic arm is arranged in spaced relation with a first wiring board, the test button is drivingly matched with the first elastic arm, when the test button moves from the initial position to the test position, the first elastic arm can be driven to contact the first wiring board, and the first elastic arm is used to drive the test button to reset from the test position to the initial position.

[0007] Optionally, the test button comprises a test button body, the test button body is slidingly arranged in a sliding hole of the shell, a connecting rod is arranged on the test button body in the sliding direction of the test button body, and a driving block for driving the first elastic arm is arranged on the end of the connecting rod.

[0008] Optionally, two limiting columns in spaced relation are arranged on the driving block, and a limiting gap corresponding to the first elastic arm is formed between the two limiting columns.

[0009] Optionally, the conductive elastic member is a torsion spring, comprising a torsion spring body, two ends of the torsion spring body respectively extend to form a first elastic arm and a second elastic arm, the first elastic arm is located between the test button and the first terminal block, and the second elastic arm is located on one side of the electronic component board, and the second elastic arm extends to the electronic component board to form the conductive part.

[0010] Optionally, the conductive part is electrically connected to the electronic component board in a rigid fixed manner, the electronic component board is provided with a connecting hole, and the conductive part is inserted or welded and fixed in the connecting hole.

[0011] A residual current circuit breaker, comprising a housing and a residual current module, the residual current module comprising an electronic component board, a zero sequence transformer, a residual current operating release and the test device of any one of the preceding claims, the zero sequence transformer and the residual current operating release being electrically connected to the electronic component board, and the electronic component board being in contact with the first terminal block through the conductive elastic member of the test device to realize power taking.

[0012] Optionally, it further comprises an L-pole unit and an N-pole unit arranged along a first direction;

[0013] The N-pole unit comprises a first N-pole terminal, an N-pole moving contact, an N-pole static contact and a second N-pole terminal arranged along a second direction in sequence, the electronic component board and the residual current operating release are arranged along a third direction in sequence, and the electronic component board and the residual current operating release are arranged between the first N-pole terminal and the second N-pole terminal in the second direction; the residual current operating release is arranged away from the first N-pole terminal and close to the second N-pole terminal, and the N-pole moving contact and the N-pole static contact are located on the side of the electronic component board away from the L-pole unit, and the conductive elastic member of the test device is located on the other side of the electronic component board;

[0014] The first direction, the second direction and the third direction are perpendicular to each other.

[0015] Optionally, the L-pole unit comprises a first L-pole terminal, an L-pole moving contact, an L-pole static contact, an L-pole arc-extinguishing chamber and a second L-pole terminal arranged along a second direction in sequence, and further comprises a short-circuit protection device, and the L-pole arc-extinguishing chamber is further arranged along a third direction in sequence with the short-circuit protection device;

[0016] An axial direction of the zero sequence transformer is arranged along the second direction, a part of the zero sequence transformer is located between the electronic component board and the second N-pole terminal, and another part of the zero sequence transformer is located between the L-pole arc-extinguishing chamber and the second L-pole terminal.

[0017] The first N-pole terminal is electrically connected with the N-pole moving contact through a first conductive structure, the first conductive structure comprises a first wiring board, the second N-pole terminal is electrically connected with the N-pole static contact through a second conductive structure; the first L-pole terminal is electrically connected with the L-pole moving contact, the second L-pole terminal is electrically connected with the short-circuit protection device through a third conductive structure, and the second conductive structure and the third conductive structure pass through the axial hole of the zero sequence transformer respectively.

[0018] Optionally, the N-pole static contact comprises a contact structure; the second conductive structure is a second wiring board, one end of the second wiring board is inserted into the second N-pole terminal, the other end of the second wiring board sequentially passes through the space between the axial hole of the zero sequence transformer and the electronic component board and the residual current operating breaker, and extends to be connected with the N-pole static contact.

[0019] Optionally, the third conductive structure comprises a fourth wiring board and a wire, one end of the fourth wiring board is inserted into the second L-pole terminal, the other end of the fourth wiring board extends to be provided with a wiring part in a first direction, the wiring part is located between the zero sequence transformer and the second N-pole terminal, one end of the wire is connected to the wiring part, and the other end of the wire passes through the axial hole of the zero sequence transformer and is electrically connected with the short-circuit protection device.

[0020] Optionally, one side of the L-pole arc extinguishing chamber facing the second L-pole terminal is in a stepped structure, a gap formed by the stepped structure and the second L-pole terminal form an accommodation space for accommodating the zero sequence transformer.

[0021] The L-pole arc extinguishing chamber comprises a plurality of first arc extinguishing fins and a plurality of second arc extinguishing fins, the first arc extinguishing fins and the second arc extinguishing fins are arranged at intervals in a third direction, and the second arc extinguishing fins are shorter than the first arc extinguishing fins to form the stepped structure.

[0022] Optionally, the N-pole unit further comprises an N-pole operating mechanism, the N-pole operating mechanism is obliquely arranged, one end of the N-pole operating mechanism is located on a side of the residual current operating breaker away from the electronic component board, the other end of the N-pole operating mechanism extends into a space between the residual current operating breaker and a test button of the test device, and the N-pole operating mechanism is connected with the N-pole moving contact.

[0023] The L-pole unit further comprises an L-pole operating mechanism, the L-pole operating mechanism is obliquely arranged, one end of the L-pole operating mechanism is located on a side of the short-circuit protection device away from the L-pole arc extinguishing chamber, and the other end of the L-pole operating mechanism is connected with the L-pole moving contact.

[0024] Optionally, one end of the N-pole operating mechanism is provided with an N-pole handle, one end of the L-pole operating mechanism is provided with an L-pole handle, the L-pole handle and the N-pole handle are synchronously linked through a linkage, and two ends of the linkage are connected with the L-pole handle and the N-pole handle respectively.

[0025] Optionally, the shell comprises an L pole cover, a base and an N pole cover arranged in sequence along the first direction, wherein the N pole cover covers one side of the base to form a first chamber, the L pole cover covers the other side of the base to form a second chamber, the base is provided with a through hole communicating the first chamber and the second chamber, and the L pole cover is provided with a support frame protruding along the first direction; the N pole unit is installed in the first chamber, the L pole unit is installed in the second chamber, and the zero sequence mutual inductor is placed on the support frame and extends into the first chamber through the through hole.

[0026] Optionally, the shell further comprises an insulating partition plate, which is arranged between the N pole moving contact and the electronic component plate and between the N pole static contact and the electronic component plate.

[0027] Optionally, the size of the residual current circuit breaker in the first direction is 36 mm.

[0028] The test device and the residual current circuit breaker of the utility model, the electrically-conductive elastic member serves as both an electrically-conductive member between the electronic component plate and the first wiring plate and a reset member of the test button, parts are reduced, the structure is simplified, the occupied space is reduced, the electrically-conductive elastic member is directly electrically connected with the electronic component plate, the electronic component plate is powered by contacting the first wiring plate in the main circuit, the electrically-conductive connection points are reduced, and the reliability of the residual current test function is improved.

[0029] In addition, the test button is designed in an elongated structure and can be placed in a narrow space, so that other structures in the pole where the test device is located are more reasonably and compactly arranged.

[0030] In addition, the protection pole and the neutral pole are both provided with an operating mechanism, so that the reliability of the neutral pole contact closing contact is improved. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 is a structural schematic view of the N pole unit and the residual current module of the utility model;

[0032] Figure 2 is a structural schematic view of the test device and the first wiring plate of the utility model;

[0033] Figure 3 is a structural schematic view of the L pole unit of the utility model;

[0034] Figure 4 is a structural schematic view of the second wiring plate, the fourth wiring plate, the zero sequence mutual inductor and the short circuit protection device of the utility model;

[0035] Figure 5 is a structural schematic view of the fourth wiring plate of the utility model;

[0036] Figure 6Is the structural schematic diagram of the L pole arc extinguishing chamber of the utility model;

[0037] Figure 7 Is the structural schematic diagram of the circuit breaker of the utility model;

[0038] Figure 8 Is the structural schematic diagram of the N pole operating mechanism and the L pole operating mechanism of the utility model.

[0039] Test device 100;Test button 110;Test button body 111;Connecting rod 112;Driving block 113;Limiting column 114;Conductive elastic piece 120;First elastic arm 121;Torsion spring body 122;Second elastic arm 123;Conductive part 124;Residual current module 200;Electronic component board 210;Connecting hole 211;Zero sequence mutual inductor 220;Residual current operated release 230;Shell 300;L pole cover 310;Support frame 311;Base 320;N pole cover 330;N pole unit 400;First N pole terminal 410;First terminal board 420;First flexible connection 430;N pole moving contact 440;N pole static contact 450;Second terminal board 460;Wiring segment 461;Connecting segment 462;Contact segment 463;Second N pole terminal 470;N pole operating mechanism 480;N pole handle 481;L pole unit 500;First L pole terminal 510;Third terminal board 520;L pole moving contact 530;L pole static contact 540;L pole arc extinguishing chamber 550;First arc extinguishing grid piece 551;Second arc extinguishing grid piece 552;Fourth terminal board 560;Wiring part 561;Wire 562;Second L pole terminal 570;L pole operating mechanism 580;L pole handle 581;Short circuit protection device 590;Overload protection device 600;Linkage 700;Linkage shaft 800;Insulating partition 900;Side flange 901;Fixing column 910. DETAILED DESCRIPTION

[0040] The following embodiments given in combination with the accompanying drawings further illustrate the specific implementation manners of the test device and the residual current operated circuit breaker of the utility model.

[0041] As Figure 1As shown in the figure, the residual current circuit breaker of the embodiment comprises a shell 300 and a residual current module 200, the residual current module 200 comprises an electronic component board 210, a zero sequence transformer 220, a residual current operating release 230 and a test device 100, the zero sequence transformer 220 and the residual current operating release 230 are electrically connected with the electronic component board 210 respectively. The residual current module 200 further comprises a test device, the test device comprises a test circuit and a test button 110, pressing the test button 110 can turn on the test circuit, which is used for simulating residual current, for detecting whether the residual current protection function is normal.

[0042] It should be noted that the working principle of the residual current circuit breaker protection is prior art, when the zero sequence transformer 220 detects that the residual current in the main circuit reaches a predetermined threshold, the electronic component board 210 controls the residual current operating release 230 to perform a release action to disconnect the main circuit to achieve circuit breaker protection; the electronic component board 210 usually takes power from the main circuit, and the electronic component board 210 at least comprises a part of the test circuit for simulating residual current, which will not be described here.

[0043] As shown in the figure, Figure 1 and Figure 2 As shown in the figure, the test device of the embodiment comprises a test button 110 and a conductive elastic member 120, the test button 110 is slidingly arranged on the shell 300 and can move between an initial position and a test position, the conductive elastic member 120 comprises a conductive part 124 and a first elastic arm 121, the conductive part 124 is directly electrically connected with the electronic component board 210, the first elastic arm 121 is arranged in spaced relation with a first wiring board 420, the test button 110 is drivingly matched with the first elastic arm 121, when the test button 110 moves from the initial position to the test position, the first elastic arm 121 can be driven to contact the first wiring board 420, the electronic component board 210 realizes power taking through the conductive elastic member 120 of the test device 100 and the contact with the first wiring board 420 in the main circuit; the first elastic arm 121 is used to drive the test button 110 to reset from the test position to the initial position.

[0044] When the test button 110 is pressed, that is, the test button 110 moves from the initial position to the test position, the first elastic arm 121 of the conductive elastic member 120 is driven by the test button 110 to contact the first wiring board 420, so as to turn on the test circuit of the electronic component board 210, generate simulated residual current, make the electronic component board 210 control the residual current operating release 230 to perform a release action, and complete the residual current operation test; when the test button 110 is released, the first elastic arm 121 resets to be separated from the first wiring board 420, and at the same time, the first elastic arm 121 drives the test button 110 to reset from the test position to the initial position.

[0045] The test device 100 of the embodiment, the conductive elastic member 120 is used as the conductive member between the electronic component plate 210 and the first wiring plate 420, and is also used as the reset member of the test button 110, which reduces the parts, simplifies the structure, reduces the occupied space, and directly connects the conductive elastic member 120 with the electronic component plate 210, realizes the power supply of the electronic component plate 210 by contacting the first wiring plate 420 in the main circuit, reduces the conductive connection points, and improves the reliability of the residual current operation test function.

[0046] As shown in Figure 2 The test button 110 of the embodiment includes a test button body 111 which is slidingly arranged in the sliding hole of the shell 300, and the test button body 111 is provided with a connecting rod 112 which extends along the sliding direction of the test button body 111, and the end of the connecting rod 112 is provided with a driving block 113 which is used for driving the first elastic arm 121. The test button 110 is designed as an elongated structure, which can be placed in a narrow space, and is beneficial to the more reasonable and compact layout of other structures in the pole where the test device 100 is located.

[0047] Further, the driving block 113 of the test button 110 is provided with two limit posts 114 which are opposite to each other and form a limit gap corresponding to the first elastic arm 121. When the driving block 113 acts on the first elastic arm 121, the first elastic arm 121 is limited in the limit gap, so that the cooperation between the test button 110 and the first elastic arm 121 is more reliable.

[0048] As shown in Figure 2 The conductive elastic member 120 of the embodiment is a torsion spring which includes a torsion spring body 122, two ends of the torsion spring body 122 respectively extend to form the first elastic arm 121 and the second elastic arm 123, the first elastic arm 121 is located between the test button 110 and the first wiring plate 420, the second elastic arm 123 is located on one side of the electronic component plate 210, and the second elastic arm 123 extends to the electronic component plate 210 to form the conductive part 124. The structure of the conductive elastic member 120 is simple, easy to manufacture and form, and can be compactly arranged between the test button 110, the first wiring plate 420 and the electronic component plate 210, thereby reducing the occupied space. Of course, the conductive elastic member 120 can also be a spring sheet or other elastic structure.

[0049] Preferably, the conductive part 124 of the conductive elastic member 120 is electrically connected to the electronic component plate 210 in a rigid fixed manner, the electronic component plate 210 is provided with a connecting hole 211, and the conductive part 124 is inserted or welded in the connecting hole 211 to realize the electrical connection with the electronic component plate 210. Of course, the conductive part 124 and the electronic component plate 210 can also be welded.

[0050] AsFigure 1 and Figure 3 As shown in FIG. 1, the residual current operating circuit breaker of the embodiment further comprises an L-pole unit 500 and an N-pole unit 400 arranged along a first direction. The N-pole unit 400 comprises a first N-pole terminal 410, an N-pole moving contact 440, an N-pole static contact 450 and a second N-pole terminal 470 arranged along a second direction in sequence, and the electronic component board 210 and the residual current operating tripping device 230 are arranged along a third direction in sequence, and the electronic component board 210 and the residual current operating tripping device 230 are arranged between the first N-pole terminal 410 and the second N-pole terminal 470 along the second direction; the residual current operating tripping device 230 is arranged away from the first N-pole terminal 410 and close to the second N-pole terminal 470, and the N-pole moving contact 440 and the N-pole static contact 450 are located on the side of the electronic component board 210 away from the L-pole unit 500, and the conductive elastic member 120 of the test device 100 is located on the other side of the electronic component board 210, i.e. the N-pole moving contact 440 and the N-pole static contact 450 and the conductive elastic member 120 are located on the two sides of the electronic component board 210 respectively, and part of the electronic component board 210 is not shown in the figure and is shielded by the insulating partition plate 900. The insulating partition plate 900 is arranged between the N-pole moving contact 440 and the electronic component board 210 and between the N-pole static contact 450 and the electronic component board 210.

[0051] The L-pole unit 500 comprises a first L-pole terminal 510, an L-pole moving contact 530, an L-pole static contact 540, an L-pole arc-extinguishing chamber 550 and a second L-pole terminal 570 arranged along the second direction in sequence, and further comprises a short-circuit protection device 590, and the L-pole arc-extinguishing chamber 550 is further arranged along the third direction in sequence with the short-circuit protection device 590.

[0052] The axial direction of the zero sequence mutual inductor 220 is arranged along the second direction, and part of the zero sequence mutual inductor 220 is located between the electronic component board 210 and the second N-pole terminal 470, and the other part of the zero sequence mutual inductor 220 is located between the L-pole arc-extinguishing chamber 550 and the second L-pole terminal 570. The zero sequence mutual inductor 220 is vertically arranged in the L-pole unit 500 and the N-pole unit 400, which reduces the space occupied by the N-pole unit 400 and facilitates the N-pole unit 400 to increase other functional modules to improve performance.

[0053] It should be noted that the first direction, the second direction and the third direction are perpendicular to each other, the first direction is the Z direction as shown in FIG. 1, the second direction is the X direction as shown in FIG. 2, and the third direction is the Y direction as shown in FIG. 3. Figure 7 and Figure 8 The second direction is the X direction as shown in FIG. 2, and the third direction is the Y direction as shown in FIG. 3. Figure 1 and Figure 3 The second direction is the X direction as shown in FIG. 2, and the third direction is the Y direction as shown in FIG. 3. Figure 1 and Figure 3The Y direction is shown. The first direction is also the width direction of the circuit breaker, the second direction is the length direction of the circuit breaker, and the third direction is the height direction of the circuit breaker.

[0054] The residual current circuit breaker of the embodiment is provided with the residual current module 200 arranged in the L-pole unit 500 and the N-pole unit 400, the zero-sequence transformer 220 occupying part of the space of the L-pole unit 500, the residual current operating release 230, the electronic component board 210 and the test device arranged in the N-pole unit 400, and the size of the residual current circuit breaker in the first direction is 36 mm, only two module spaces are temporarily used, one module space is about 18 mm, and the width of the residual current circuit breaker is 36 mm.

[0055] As shown in the drawings, Figure 1 The conductive structure between the first N-pole terminal 410 and the N-pole moving contact 440 of the embodiment includes the first conductive structure electrically connecting the first N-pole terminal 410 and the N-pole moving contact 440. The first conductive structure includes the first terminal plate 420 and the first flexible connection 430. One end of the first terminal plate 420 is inserted into the first N-pole terminal 410 and cooperates with the first N-pole terminal 410 for external connection. The other end of the first flexible connection 430 is welded to the N-pole moving contact 440.

[0056] As shown in the drawings, Figure 1 and Figure 4 The conductive structure between the second N-pole terminal 470 and the N-pole static contact 450 of the embodiment includes the second conductive structure electrically connecting the second N-pole terminal 470 and the N-pole static contact 450. The second conductive structure passes through the axial hole of the zero-sequence transformer 220. The N-pole static contact 450 includes a contact structure. The second conductive structure is the second terminal plate 460. One end of the second terminal plate 460 is inserted into the second N-pole terminal 470 and cooperates with the second N-pole terminal 470 for external connection. The other end of the second terminal plate 460 sequentially passes through the axial hole of the zero-sequence transformer 220, the space between the electronic component board 210 and the residual current operating release 230, and extends to the N-pole static contact 450. The structure of the second terminal plate 460 is optimized to serve as a terminal plate and a fixing plate of the contact type N-pole static contact 450, simplifying the structure and reducing the occupied space.

[0057] Specifically, the second terminal block 460 comprises a connecting segment 462 and a contact segment 463 connected in sequence, and a wiring segment 461 inserted into the second N-pole terminal 470, the wiring segment 461 being preferably a straight structure arranged in the second direction; the N-pole static contact 450 is arranged on the contact segment 463, the contact segment 463 being a straight structure arranged in the third direction; the connecting segment 462 passes through the axial hole of the zero sequence transformer 220 and extends between the electronic component board 210 and the residual current operating trip 230, the connecting segment 462 being preferably a bent structure composed of three segments connected in sequence and vertically, the segment of the connecting segment 462 connected with the wiring segment 461 being arranged in the second direction, the middle segment of the connecting segment 462 being arranged in the third direction and parallel to the contact segment 463, and the other segment of the connecting segment 462 being arranged in the second direction and connected with the contact segment 463 vertically.

[0058] As shown in Figure 3 the first L-pole terminal 510 is electrically connected with the L-pole movable contact 530. The L-pole unit 500 further comprises an overload protection device 600, which is a bimetallic strip, the overload protection device 600 being located between the first L-pole terminal 510 and the L-pole movable contact 530, the overload protection device 600 being electrically connected with the first L-pole terminal 510 through a third terminal block 520, one end of the third terminal block 520 being inserted into the first L-pole terminal 510 and cooperating with the first L-pole terminal 510 for external connection, the other end of the third terminal block 520 being welded with the overload protection device 600; the overload protection device 600 being electrically connected with the L-pole movable contact 530 through a second soft connection, both ends of the second soft connection being welded on the overload protection device 600 and the L-pole movable contact 530 respectively.

[0059] As shown in Figures 3-5As shown, the conductive structure between the second L-pole terminal 570 and the short-circuit protection device 590 in the embodiment is electrically connected through a third conductive structure which passes through the axial hole of the zero-sequence transformer 220. For example, the third conductive structure includes a fourth terminal plate 560 and a wire 562. One end of the fourth terminal plate 560 is inserted into the second L-pole terminal 570 and cooperates with the second L-pole terminal 570 for external connection. The other end of the fourth terminal plate 560 extends in a first direction and is provided with a terminal portion 561. The terminal portion 561 is located between the zero-sequence transformer 220 and the second N-pole terminal 470. One end of the wire 562 is connected to the terminal portion 561, and the other end of the wire 562 passes through the axial hole of the zero-sequence transformer 220 and is electrically connected to the short-circuit protection device 590. The terminal portion 561 extending to the side of the zero-sequence transformer 220 through the fourth terminal plate 560 and the wire 562 which is easy to arrange optimize the conductive structure between the second L-pole terminal 570 and the short-circuit protection device 590 and reduce the occupied space.

[0060] As shown in Figure 3 and Figure 6 , the side of the L-pole arc-extinguishing chamber 550 facing the second L-pole terminal 570 is designed as a stepped structure. The stepped structure forms a gap between the second L-pole terminal 570 and the gap forms a space for accommodating the zero-sequence transformer 220. Specifically, the L-pole arc-extinguishing chamber 550 includes a plurality of first arc-extinguishing fins 551 and a plurality of second arc-extinguishing fins 552. The first arc-extinguishing fins 551 and the second arc-extinguishing fins 552 are arranged in a third direction and the second arc-extinguishing fins 552 are shorter than the first arc-extinguishing fins 551 to form the stepped structure. The side of the L-pole arc-extinguishing chamber 550 is designed as a stepped structure, which guarantees the arc-extinguishing capability of the L-pole arc-extinguishing chamber 550 and provides space for the zero-sequence transformer 220.

[0061] As shown in Figure 1 , Figure 3 and Figure 7As shown, the housing 300 of this embodiment includes an L-pole cover 310, a base 320, and an N-pole cover 330 arranged sequentially along a first direction. The N-pole cover 330 covers one side of the base 320 to form a first chamber, and the L-pole cover 310 covers the other side of the base 320 to form a second chamber. The base 320 has a through hole connecting the first chamber and the second chamber. The L-pole cover 310 has a support frame 311 protruding along the first direction. The N-pole unit 400 is installed in the first chamber, and the L-pole unit 500 is installed in the second chamber. The zero-sequence current transformer 220 is placed on the support frame 311, with a portion passing through the through hole and extending into the first chamber. In this embodiment, the N-pole cover 330 and the L-pole cover 310 share the same base 320. Of course, as in other embodiments, the housing 300 may also include an independent N-pole shell for accommodating the N-pole unit 400 and an L-pole shell for accommodating the L-pole unit 500.

[0062] like Figure 1 As shown, the residual current operated circuit breaker of this embodiment further includes an insulating partition 900, which blocks the N-pole moving contact 440 from the electronic component board 210 and the N-pole stationary contact 450 from the electronic component board 210. The insulating partition 900 provides electrical isolation, separating the moving and stationary contacts from the electronic component board 210 and the conductive elastic element 120, thereby improving safety. A side flange 901 protrudes from one side of the insulating partition 900 facing the N-pole moving contact 440 and the N-pole stationary contact 450 to enhance the isolation and protection effect; a support foot protrudes from the other side of the insulating partition 900 for support on the base 320; a fixing post 910 is also provided on the insulating partition 900, and the torsion spring body 122 of the conductive elastic element 120 is sleeved on the fixing post 910.

[0063] like Figure 7 and Figure 8As shown, the N-pole unit 400 of the embodiment further comprises an N-pole operating mechanism 480, which is arranged obliquely, with one end located at the side of the residual current tripping device 230 away from the electronic component board 210 and the other end extending into the residual current tripping device 230 and the test button 110 of the test device 100 and connected with the N-pole movable contact 440. The L-pole unit 500 of the embodiment further comprises an L-pole operating mechanism 580, which is arranged obliquely, with one end located at the side of the short-circuit protection device 590 away from the L-pole arc-extinguishing chamber 550 and the other end connected with the L-pole movable contact 530. The operating mechanisms are arranged for the protection pole and the neutral pole, which improves the reliability of the closed contact of the neutral pole contact. The connecting rod 112 of the test button 110 extends from the side of the N-pole operating mechanism 480 away from the residual current tripping device 230, substantially along the side wall of the shell 300 to the position below the N-pole operating mechanism 480 and close to the N-pole movable contact 440.

[0064] Further, the L-pole operating mechanism 580 and the N-pole operating mechanism 480 are synchronously linked, one end of the N-pole operating mechanism 480 is provided with an N-pole handle 481, one end of the L-pole operating mechanism 580 is provided with an L-pole handle 581, the L-pole handle 581 and the N-pole handle 481 are synchronously linked through a linkage 700, and the two ends of the linkage 700 are connected with the L-pole handle 581 and the N-pole handle 481, respectively. The handles of the operating mechanisms of the two poles are assembled with the linkage 700 to realize synchronous closing and opening operations.

[0065] It should be noted that the N-pole operating mechanism 480 and the L-pole operating mechanism 580 have the same structure, the handle drives the movable contact through a connecting rod structure to make the movable contact contact or separate from the static contact to turn on or turn off the main circuit. The connecting rod structure is a prior art, which generally comprises a connecting rod, a lever, a lock catch and a trip catch in snap-fit, the lock catch is rotated to release the snap-fit of the lock catch and the trip catch, which can make the operating mechanism trip, drive the movable contact to separate from the static contact, and realize tripping protection, which will not be described herein. The lock catches of the N-pole operating mechanism 480 and the L-pole operating mechanism 580 are linked through a linkage shaft 800 to realize synchronous tripping.

[0066] The residual current tripping device 230 and the short-circuit protection device 590 of the embodiment are prior arts, when the residual current or the short-circuit current appears in the main circuit, the top rod of the residual current tripping device 230 or the short-circuit protection device 590 pushes the lock catch to rotate, which makes the operating mechanism trip to realize the circuit breaker tripping protection, which will not be described herein.

[0067] It should be noted that in the description of the present application, the terms "upper", "lower", "left", "right", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings or the orientation or positional relationship commonly used in use, and are only for the convenience of description, and do not indicate that the device or element referred to must have a particular orientation, so it cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" and the like are only used for differentiation in description, and cannot be understood as indicating relative importance.

[0068] The above is a further detailed description of the present application in combination with specific preferred embodiments, and the specific implementation of the present application cannot be limited to these descriptions. For ordinary skilled persons in the technical field to which the present application belongs, without departing from the concept of the present application, a number of simple deductions or substitutions can be made, which should be considered as falling within the scope of protection of the present application.

Claims

1. A testing device, characterized by: The test button (110) is slidably arranged on the shell (300) and can be moved between an initial position and a test position, and the conductive elastic member (120) includes a conductive part (124) and a first elastic arm (121), the conductive part (124) is directly electrically connected with the electronic component board (210), and the first elastic arm (121) is arranged in spaced opposition with the first wiring board (420), the test button (110) is drivingly matched with the first elastic arm (121), and when the test button (110) is moved from the initial position to the test position, the first elastic arm (121) can be driven to contact the first wiring board (420); the first elastic arm (121) is used to drive the test button (110) to reset from the test position to the initial position.

2. The test device of claim 1, wherein: The test button (110) includes a test button body (111), the test button body (111) is slidably arranged in a sliding hole of the shell (300), and the test button body (111) is provided with a connecting rod (112) extending in the sliding direction of the test button body (111), and the end of the connecting rod (112) is provided with a driving block (113) for driving the first elastic arm (121).

3. The test device of claim 2, wherein: The driving block (113) is provided with two limit columns (114) in spaced opposition, and a limit gap corresponding to the first elastic arm (121) is formed between the two limit columns (114).

4. The test device of claim 1, wherein: The conductive elastic member (120) is a torsion spring, including a torsion spring body (122), both ends of the torsion spring body (122) extend to form a first elastic arm (121) and a second elastic arm (123) respectively, the first elastic arm (121) is located between the test button (110) and the first wiring board (420), and the second elastic arm (123) is located on one side of the electronic component board (210), and the second elastic arm (123) extends to the electronic component board (210) to form the conductive part (124).

5. The test device of claim 1, wherein: The conductive part (124) is electrically connected to the electronic component board (210) in a rigid fixed manner, the electronic component board (210) is provided with a connecting hole (211), and the conductive part (124) is inserted or welded and fixed in the connecting hole (211).

6. Residual current operated circuit breaker, characterized in that: The shell (300) and the residual current module (200) are included, the residual current module (200) includes an electronic component board (210), a zero sequence mutual inductor (220), a residual current operating release (230) and the test device (100) of any one of claims 1-5, the zero sequence mutual inductor (220) and the residual current operating release (230) are electrically connected with the electronic component board (210) respectively, and the electronic component board (210) is contacted with the first wiring board (420) to realize power taking through the conductive elastic member (120) of the test device (100).

7. The residual current circuit breaker according to claim 6, characterized in that: The L-pole unit (500) and the N-pole unit (400) arranged in the first direction are also included. The N-pole unit (400) comprises a first N-pole terminal (410), an N-pole movable contact (440), an N-pole static contact (450) and a second N-pole terminal (470) arranged in sequence along a second direction, the electronic component board (210) and the residual current operating trip unit (230) are arranged in sequence along a third direction, and the electronic component board (210) and the residual current operating trip unit (230) are arranged between the first N-pole terminal (410) and the second N-pole terminal (470) along the second direction; the residual current operating trip unit (230) is arranged away from the first N-pole terminal (410) and close to the second N-pole terminal (470), and the N-pole movable contact (440) and the N-pole static contact (450) are located on the side of the electronic component board (210) away from the L-pole unit (500), and the conductive elastic member (120) of the test device (100) is located on the other side of the electronic component board (210); The first direction, the second direction and the third direction are perpendicular to each other.

8. The residual current operated circuit breaker according to claim 7, characterized in that: The L-pole unit (500) comprises a first L-pole terminal (510), an L-pole movable contact (530), an L-pole static contact (540), an L-pole arc extinguishing chamber (550) and a second L-pole terminal (570) arranged in sequence along a second direction, and further comprises a short-circuit protection device (590), and the L-pole arc extinguishing chamber (550) is further arranged along a third direction with the short-circuit protection device (590); The axial direction of the zero sequence transformer (220) is arranged along the second direction, and a part of the zero sequence transformer (220) is located between the electronic component board (210) and the second N-pole terminal (470), and the other part of the zero sequence transformer (220) is located between the L-pole arc extinguishing chamber (550) and the second L-pole terminal (570); The first N-pole terminal (410) is electrically connected with the N-pole movable contact (440) through a first conductive structure, the first conductive structure comprises a first terminal plate (420), the second N-pole terminal (470) is electrically connected with the N-pole static contact (450) through a second conductive structure; the first L-pole terminal (510) is electrically connected with the L-pole movable contact (530), the second L-pole terminal (570) is electrically connected with the short-circuit protection device (590) through a third conductive structure, and the second conductive structure and the third conductive structure pass through the axial hole of the zero sequence transformer (220) respectively.

9. The residual current circuit breaker according to claim 8, characterized in that: The N-pole static contact (450) comprises a contact structure; the second conductive structure is a second terminal plate (460), one end of the second terminal plate (460) is inserted into the second N-pole terminal (470), the other end of the second terminal plate (460) sequentially passes through the axial hole of the zero sequence transformer (220), the space between the electronic component board (210) and the residual current operating trip unit (230), and extends to be connected with the N-pole static contact (450).

10. The residual current circuit breaker according to claim 8, characterized in that: The third conductive structure comprises a fourth wiring board (560) and a wire (562), one end of the fourth wiring board (560) is inserted into the second L-pole wiring terminal (570), the other end of the fourth wiring board (560) extends in the first direction and is provided with a wiring part (561), the wiring part (561) is located between the zero sequence transformer (220) and the second N-pole wiring terminal (470), one end of the wire (562) is connected to the wiring part (561), and the other end of the wire (562) passes through an axial hole of the zero sequence transformer (220) and is electrically connected to the short-circuit protection device (590).

11. The residual current circuit breaker according to claim 8, characterized in that: The L-pole arc-extinguishing chamber (550) is provided with a stepped structure on the side facing the second L-pole wiring terminal (570), and the stepped structure forms a gap, and a space is formed between the gap and the second L-pole wiring terminal (570) to accommodate the zero sequence transformer (220). The L-pole arc-extinguishing chamber (550) comprises a plurality of first arc-extinguishing fins (551) and a plurality of second arc-extinguishing fins (552), the first arc-extinguishing fins (551) and the second arc-extinguishing fins (552) are arranged in the third direction, and the second arc-extinguishing fins (552) are shorter than the first arc-extinguishing fins (551) to form the stepped structure.

12. The residual current circuit breaker according to claim 8, characterized in that: The N-pole unit (400) further comprises an N-pole operating mechanism (480), the N-pole operating mechanism (480) is obliquely arranged, one end of the N-pole operating mechanism (480) is located on the side of the residual current operating trip (230) away from the electronic component board (210), the other end of the N-pole operating mechanism (480) extends into the residual current operating trip (230) and the test button (110) of the test device (100), and the N-pole operating mechanism (480) is connected to the N-pole movable contact (440). The L-pole unit (500) further comprises an L-pole operating mechanism (580), the L-pole operating mechanism (580) is obliquely arranged, one end of the L-pole operating mechanism (580) is located on the side of the short-circuit protection device (590) away from the L-pole arc-extinguishing chamber (550), and the other end of the L-pole operating mechanism (580) is connected to the L-pole movable contact (530).

13. The residual current circuit breaker according to claim 12, characterized in that: One end of the N-pole operating mechanism (480) is provided with an N-pole handle (481), one end of the L-pole operating mechanism (580) is provided with an L-pole handle (581), the L-pole handle (581) and the N-pole handle (481) are synchronously connected through a linkage (700), and the two ends of the linkage (700) are connected to the L-pole handle (581) and the N-pole handle (481), respectively.

14. The residual current circuit breaker according to claim 7, characterized in that: The shell (300) comprises an L-pole cover (310), a base (320) and an N-pole cover (330) arranged in sequence along a first direction, wherein the N-pole cover (330) covers one side of the base (320) to form a first chamber, the L-pole cover (310) covers the other side of the base (320) to form a second chamber, the base (320) is provided with a through hole communicating the first chamber and the second chamber, and the L-pole cover (310) is provided with a support frame (311) protruding along the first direction; the N-pole unit (400) is installed in the first chamber, the L-pole unit (500) is installed in the second chamber, and the zero sequence mutual inductor (220) is placed on the support frame (311) and extends into the first chamber through the through hole.

15. The residual current circuit breaker according to claim 7, characterized in that: Further comprising an insulating partition plate (900) which is arranged between the N-pole moving contact (440) and the electronic component board (210) and between the N-pole static contact (450) and the electronic component board (210).

16. The residual current circuit breaker according to claim 6 or 7, characterized in that: The residual current circuit breaker has a size of 36 mm in the first direction.

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