An electronic leakage circuit breaker

Abstract

An electronic leakage circuit breaker. It solves the problem that the existing contact system will affect the control circuit board when disconnected. It includes a shell, the shell includes a first shell and a middle shell, the first shell and the middle shell cooperate with each other to form a first accommodating chamber, and also includes: a first contact mechanism, which is arranged in the first accommodating chamber and is arranged in close contact with the middle shell; the first contact mechanism includes a moving contact piece and a static contact piece; a zero-sequence transformer, which is arranged in the first accommodating chamber; a control circuit board, which is connected to the zero-sequence transformer and is used to receive the signal on the zero-sequence transformer; an isolation component, which is arranged between the control circuit board and the first contact mechanism, and is used to separate the control circuit board and the first contact mechanism. The beneficial effect of the utility model is that an isolation component is provided to separate the control circuit board and the first contact mechanism, so as to prevent the arc of the contact mechanism from affecting the control circuit board and thus affecting the life and stability of the product.

Description

Technical Field

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

[0002] The leakage protector, also known as the leakage switch or leakage circuit breaker, is mainly used to protect against leakage faults in equipment and personal electric shock, which is dangerous and fatal. It has overload and short-circuit protection functions, and can be used to protect the overload and short circuit of the line or motor. It can also be used for infrequent switching and starting of the line under normal circumstances. The electronic leakage circuit breaker is mainly composed of a zero-sequence current transformer, an electronically controlled leakage release, and a circuit breaker with overload and short-circuit protection. When there is leakage in the protected circuit or personal electric shock, as long as the leakage current reaches the designed selected action current value, the secondary winding of the zero-sequence current transformer will output a signal, and the circuit breaker will be activated through the leakage release, thereby cutting off the power supply to protect against leakage and electric shock.

[0003] However, the existing leakage circuit breaker control circuit board, contact system and zero-sequence transformer are all placed in one chamber, so that the arc generated when the contact system is disconnected can easily damage the control circuit board and the components arranged thereon, thus affecting the service life of the product. Utility Model Content

[0004] In order to solve the problem in the background technology that the existing contact system will affect the control circuit board when it is disconnected, the utility model provides an electronic leakage circuit breaker.

[0005] The technical solution of the utility model is: an electronic leakage circuit breaker, comprising a shell, wherein the shell comprises a first shell and a middle shell, wherein the first shell and the middle shell cooperate with each other to form a first accommodating cavity, and further comprising:

[0006] Terminal blocks, used for wiring;

[0007] A first contact mechanism is disposed in the first accommodating cavity and is arranged in close contact with the middle shell; the first contact mechanism comprises a moving contact piece and a stationary contact piece;

[0008] The transmission mechanism is arranged in the first accommodating cavity, and the movable contact piece is arranged on the transmission mechanism and is driven to move by the transmission mechanism;

[0009] A zero-sequence mutual inductor is arranged in the first accommodating cavity;

[0010] A control circuit board is connected to the zero-sequence transformer and is used to receive a signal from the zero-sequence transformer;

[0011] A release device is arranged in the first accommodating chamber, connected to the control circuit board and used to control the action of the transmission mechanism to separate the moving contact piece from the stationary contact piece;

[0012] The isolation component is arranged between the control circuit board and the first contact mechanism, and is used to separate the control circuit board and the first contact mechanism.

[0013] As a further improvement of the present invention, the isolation assembly comprises a first isolation plate, and the first isolation plate is arranged above the first contact mechanism.

[0014] As a further improvement of the utility model, it also includes a partition plate for separating the first contact mechanism and the zero-sequence transformer, and the first isolation plate is arranged above the partition plate and supported by the partition plate.

[0015] As a further improvement of the utility model, it also includes a baffle, which is arranged in an arc shape. The baffle and the partition plate cooperate with each other to form an installation groove for installing the static contact piece. The static contact piece is provided with a wire, and the wire passes through the zero-sequence transformer.

[0016] As a further improvement of the utility model, a first positioning block is provided on the partition plate, a positioning hole cooperating with the first positioning block is provided on the first isolation plate, and the components of the control circuit board at the first isolation plate are arranged on a side away from the first contact mechanism.

[0017] As a further improvement of the utility model, a card plate is provided on the first isolation plate, and there are at least two card plates, and at least two card plates are disposed on both sides of the partition plate and fit with the partition plate.

[0018] As a further improvement of the present invention, the isolation assembly includes a second isolation plate, and the releaser is arranged in the second isolation plate.

[0019] As a further improvement of the utility model, a cavity is provided on the second isolation plate, and the components of the control circuit board at the second isolation plate are arranged in the cavity.

[0020] As a further improvement of the utility model, the second isolation plate is provided with a plurality of second positioning blocks, and different second positioning blocks are arranged in parallel. The second isolation plate is provided with a limiting notch, and the zero-sequence transformer is vertically placed in the limiting notch and is horizontally limited by the second isolation plate. The control circuit board is provided with a clearance hole, and the zero-sequence transformer is arranged through the clearance hole.

[0021] As a further improvement of the utility model, the wiring terminal is provided with a bending portion, the bending portion is provided with a support frame, the control circuit board is inserted into the support frame and connected to the support frame, and the support frame is provided with a limiter for controlling the vertical limit of the circuit board.

[0022] The utility model has the beneficial effect that an isolation component is provided to separate the control circuit board and the first contact mechanism, so as to prevent the arc of the contact mechanism from affecting the control circuit board and thus affecting the life and stability of the product. The utility model also has the advantages of simple structure, convenient assembly, reliable operation, stable performance, and long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Attached Figure 1 It is a schematic structural diagram of an embodiment of the utility model.

[0024] Attached Figure 2 This is a schematic diagram of the structure of the embodiment of the utility model after removing the first shell.

[0025] Attached Figure 3 The figure is a schematic diagram of the explosion structure of an embodiment of the utility model.

[0026] Attached Figure 4 The figure is a schematic diagram of the explosion structure of an embodiment of the utility model.

[0027] Attached Figure 5 It is a schematic structural diagram of the first isolation plate of an embodiment of the utility model.

[0028] Attached Figure 6 It is a schematic diagram of the structure of the shell in the embodiment of the utility model.

[0029] In the figure, 1, shell; 11, first shell; 12, middle shell; 13, first accommodating cavity; 14, partition plate; 141, first positioning block; 15, baffle; 16, mounting groove; 17, wire; 2, terminal; 21, bending part; 22, support frame; 23, limiter; 3, first contact mechanism; 31, moving contact piece; 32, static contact piece; 4, transmission mechanism; 5, zero-sequence mutual inductor; 6, control circuit board; 61, clearance hole; 7, release; 8, isolation assembly; 81, first isolation plate; 811, positioning hole; 812, card plate; 82, second isolation plate; 821, accommodating cavity; 822, second positioning block; 823, limiting notch. DETAILED DESCRIPTION

[0030] The following is a further description of the embodiments of the present invention in conjunction with the accompanying drawings:

[0031] Depend on Figure 1 Combination Figure 2-6 As shown, an electronic leakage circuit breaker includes a housing 1, wherein the housing 1 includes a first housing 11 and a middle housing 12, wherein the first housing 11 and the middle housing 12 cooperate with each other to form a first accommodating cavity 13, and further includes:

[0032] Terminal block 2, used for wiring;

[0033] The first contact mechanism 3 is disposed in the first accommodating cavity 13 and is arranged in close contact with the middle shell 12; the first contact mechanism 3 includes a moving contact piece 31 and a stationary contact piece 32;

[0034] The transmission mechanism 4 is disposed in the first accommodating chamber 13, and the movable contact piece 31 is disposed on the transmission mechanism 4 and is driven to move by the transmission mechanism 4;

[0035] The zero-sequence mutual inductor 5 is arranged in the first accommodating cavity 13;

[0036] A control circuit board 6 is connected to the zero-sequence transformer 5 and is used to receive a signal from the zero-sequence transformer 5;

[0037] The release device 7 is disposed in the first accommodating chamber 13, connected to the control circuit board 6 and used to control the transmission mechanism 4 to separate the moving contact piece 31 from the stationary contact piece 32;

[0038] The isolation component 8 is provided between the control circuit board 6 and the first contact mechanism 3, and is used to separate the control circuit board 6 and the first contact mechanism 3. The beneficial effect of the utility model is that the isolation component is provided to separate the control circuit board and the first contact mechanism, so as to prevent the arc of the contact mechanism from affecting the control circuit board and thus affecting the life and stability of the product. The utility model also has the advantages of simple structure, convenient assembly, reliable operation, stable performance, and long service life.

[0039] The isolation assembly 8 includes a first isolation plate 81, and the first isolation plate 81 is arranged above the first contact mechanism 3. The first contact mechanism is arranged close to the middle shell, and the space in the first accommodating cavity is reasonably utilized. The first isolation plate separates the control circuit board 6 and the first contact mechanism 3 to prevent the electrical components from being burned by the arc.

[0040] The utility model further includes a partition plate 14 for separating the first contact mechanism 3 and the zero-sequence transformer 5, and the first isolation plate 81 is arranged above the partition plate 14 and supported by the partition plate 14. The partition plate is arranged to separate the first contact mechanism 3 and the zero-sequence transformer 5, and the arc is confined to a specific area to avoid damage to other components.

[0041] The utility model further comprises a baffle 15, the baffle 15 is arranged in an arc shape, the baffle 15 and the partition plate 14 cooperate with each other to form a mounting groove 16 for mounting the static contact piece 32, the static contact piece 32 is provided with a wire 17, and the wire 17 is arranged through the zero sequence mutual inductor 5. The arrangement of the baffle facilitates the installation and positioning of the static contact piece, and the structure is simple.

[0042] The partition plate 14 is provided with a first positioning block 141, the first isolation plate 81 is provided with a positioning hole 811 that cooperates with the first positioning block 141, and the components of the control circuit board 6 at the first isolation plate are arranged on a side away from the first contact mechanism 3. The provision of the first positioning block and the second positioning block facilitates the positioning of the control circuit board, facilitates assembly, and has a simple structure.

[0043] The first isolation plate 81 is provided with a clamping plate 812, and there are at least two clamping plates 812, and at least two clamping plates 812 are arranged on both sides of the partition plate 14 and fit the partition plate 14. The arrangement of the clamping plate can limit the position of the first isolation plate after the first isolation plate is placed on the partition plate, and the structure is simple and the limit is reliable.

[0044] The isolation assembly 8 includes a second isolation plate 82, and the release 7 is arranged in the second isolation plate 82. This facilitates the installation of the release, has a simple structure, and enables the release and the second isolation plate to be installed in one piece, simplifying assembly.

[0045] The second isolation plate 82 is provided with a cavity 821, and the components of the control circuit board 6 at the second isolation plate 82 are arranged in the cavity 821. In this way, larger electrical components (electrical components) can be placed in the cavity, reducing the product size and making reasonable use of the space of the first cavity.

[0046] The second isolation plate 82 is provided with a plurality of second positioning blocks 822, and different second positioning blocks 822 are arranged in parallel. The second isolation plate 82 is provided with a limiting notch 823, and the zero-sequence mutual inductor 5 is vertically placed in the limiting notch 823 and horizontally limited by the second isolation plate 82. The control circuit board 6 is provided with a clearance hole 61, and the zero-sequence mutual inductor 5 is arranged through the clearance hole 61. The limiting notch can limit the zero-sequence mutual inductor in the horizontal direction, and the zero-sequence mutual inductor is vertically arranged to reasonably utilize the space in the first accommodating cavity. At the same time, the control circuit board is provided with a clearance hole, which has a simple structure, convenient installation, reliable limiting, and more reasonable space utilization. Of course, a clearance hole can also be provided at the release.

[0047] The wiring terminal 2 is provided with a bending portion 21, the bending portion 21 is provided with a support frame 22, the control circuit board 6 is inserted into the support frame 22 and connected to the support frame 22, and the support frame 22 is provided with a limiter 23 for vertically limiting the control circuit board 6. Such a structure facilitates the support and limiting of the circuit board, and of course, there can be multiple limiters.

[0048] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0049] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. In addition, in the description of the present utility model, unless otherwise specified, "plurality" means two or more.

[0050] Technical personnel should note: Although the utility model has been described according to the above specific implementation methods, the utility model concept is not limited to this utility model. Any modification using the utility model concept will be included in the scope of protection of the utility model patent right.

Claims

1. An electronic residual current circuit breaker, comprising a housing (1), wherein the housing (1) comprises a first housing (11) and a middle housing (12), wherein the first housing (11) and the middle housing (12) cooperate with each other to form a first accommodating cavity (13), characterized in that Also included: A wiring terminal (2) for wiring; A first contact mechanism (3) is disposed in the first accommodating cavity (13) and is arranged in close contact with the middle shell (12); the first contact mechanism (3) comprises a moving contact piece (31) and a stationary contact piece (32); The transmission mechanism (4) is disposed in the first accommodating chamber (13); the movable contact piece (31) is disposed on the transmission mechanism (4) and is driven to move by the transmission mechanism (4); A zero-sequence mutual inductor (5) is arranged in the first accommodating cavity (13); A control circuit board (6) connected to the zero-sequence transformer (5) and used for receiving a signal from the zero-sequence transformer (5); A release device (7) is disposed in the first accommodating chamber (13), connected to the control circuit board (6) and used to control the operation of the transmission mechanism (4) so ​​as to separate the moving contact piece (31) from the stationary contact piece (32); The isolation component (8) is arranged between the control circuit board (6) and the first contact mechanism (3) and is used to separate the control circuit board (6) and the first contact mechanism (3).

2. An electronic residual current circuit breaker according to claim 1, characterized in that The isolation assembly (8) comprises a first isolation plate (81), and the first isolation plate (81) is arranged above the first contact mechanism (3).

3. An electronic leakage circuit breaker according to claim 2, characterized in that It also includes a partition plate (14) for separating the first contact mechanism (3) and the zero-sequence transformer (5), and the first isolation plate (81) is arranged above the partition plate (14) and supported by the partition plate (14).

4. An electronic residual current circuit breaker according to claim 3, characterized in that The device further comprises a baffle (15), wherein the baffle (15) is arranged in an arc shape, and the baffle (15) and the partition plate (14) cooperate with each other to form a mounting groove (16) for mounting a stationary contact piece (32), and a wire (17) is arranged on the stationary contact piece (32), and the wire (17) passes through the zero-sequence mutual inductor (5).

5. An electronic residual current circuit breaker according to claim 3, characterized in that The partition plate (14) is provided with a first positioning block (141), the first isolation plate (81) is provided with a positioning hole (811) that cooperates with the first positioning block (141), and the components of the control circuit board (6) at the first isolation plate are arranged on a side away from the first contact mechanism (3).

6. An electronic residual current circuit breaker according to claim 3, characterized in that A clamping plate (812) is provided on the first isolation plate (81), and there are at least two clamping plates (812), and at least two clamping plates (812) are provided on both sides of the partition plate (14) and are in contact with the partition plate (14).

7. An electronic residual current circuit breaker according to claim 1, characterized in that The isolation assembly (8) comprises a second isolation plate (82), and the release device (7) is arranged in the second isolation plate (82).

8. An electronic residual current circuit breaker according to claim 7, characterized in that The second isolation plate (82) is provided with a cavity (821), and the components of the control circuit board (6) at the second isolation plate (82) are arranged in the cavity (821).

9. An electronic residual current circuit breaker according to claim 7, characterized in that The second isolation plate (82) is provided with a plurality of second positioning blocks (822), and different second positioning blocks (822) are arranged in parallel. The second isolation plate (82) is provided with a limiting notch (823), and the zero-sequence mutual inductor (5) is vertically placed in the limiting notch (823) and horizontally limited by the second isolation plate (82). The control circuit board (6) is provided with a clearance hole (61), and the zero-sequence mutual inductor (5) is arranged through the clearance hole (61).

10. An electronic residual current circuit breaker according to claim 1, characterized in that The wiring terminal (2) is provided with a bending portion (21), the bending portion (21) is provided with a support frame (22), the control circuit board (6) is inserted into the support frame (22) and connected to the support frame (22), and the support frame (22) is provided with a limiting member (23) for vertically limiting the control circuit board (6).

Images