Compact residual-current circuit breaker

Abstract

The utility model discloses a compact residual-current circuit breaker. The problem that an existing residual-current circuit breaker is large in size is solved. The switch comprises a housing, the housing comprises an upper cover and a pedestal, and the switch also comprises a contact system arranged in the housing and used for connecting or disconnecting a circuit in the housing; the operating mechanism is arranged in the shell and is used for driving the contact system to act; the mutual inductor is used for detecting leakage current; the motor is arranged in a lower space of the operating mechanism; the circuit board is arranged in the shell, and the mutual inductor is electrically connected with the circuit board; the release and the operating mechanism are arranged side by side, and the release is arranged in the space above the mutual inductor; the wiring terminal is used for wire incoming or wire outgoing; and the circuit board is vertically arranged, and the circuit board is arranged between the wiring terminal and the mutual inductor and is vertically arranged. The utility model has the beneficial effects that the circuit board is vertically arranged and the space below the operating mechanism is reasonably utilized, so that the width of a product is greatly reduced, and more residual-current circuit breakers can be assembled on a distribution box with the same specification.

Description

Technical Field

[0001] The utility model relates to a leakage circuit breaker, in particular to a compact leakage circuit breaker. Background Art

[0002] The leakage protector, also known as the leakage switch or leakage circuit breaker, is mainly used to protect the equipment from leakage faults and personal electric shock with fatal danger. 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 as an infrequent switching start of the line under normal circumstances. The existing leakage circuit breaker usually includes a contact system, a mutual inductor, a circuit board and a release. The contact system usually includes a static contact piece and a moving contact piece. The mutual inductor and the release are both connected to the circuit board. The mutual inductor detects the leakage signal and transmits it to the circuit board. The circuit board controls the release to separate the moving contact piece from the static contact piece to play the role of leakage protection. However, the existing leakage circuit breaker has a complex structure and a large product volume. Usually, the circuit board is installed horizontally, which makes the product volume larger. Taking the 2P leakage circuit breaker as an example, the original 2P function width is modularized to 54mm. Therefore, when multiple leakage circuit breakers are needed to cooperate, multiple distribution boxes are needed to cooperate, which wastes a lot of space. Utility Model Content

[0003] In order to solve the problem of large size of the existing leakage circuit breaker in the background technology, the utility model provides a compact leakage circuit breaker.

[0004] The technical solution of the utility model is: a compact leakage circuit breaker, comprising a housing, wherein the housing comprises an upper cover and a base, and further comprises:

[0005] A contact system, arranged in the housing, for connecting or disconnecting the circuit in the housing;

[0006] An operating mechanism, arranged in the housing, is used to drive the contact system to move;

[0007] Transformer, used to detect leakage current; installed in the space below the operating mechanism;

[0008] A circuit board is arranged in the housing, and the mutual inductor is electrically connected to the circuit board;

[0009] A trip device is arranged side by side with the operating mechanism and is arranged in the space above the transformer;

[0010] The wiring terminal is used for incoming or outgoing lines; the circuit board is vertically arranged, and the circuit board is arranged between the wiring terminal and the transformer and is vertically arranged.

[0011] As a further improvement of the present invention, the width of the shell is less than 40 mm.

[0012] As a further improvement of the present invention, the width of the shell is 36 mm.

[0013] As a further improvement of the utility model, it also includes a first protective cover, and the first protective cover is sleeved outside the circuit board.

[0014] As a further improvement of the utility model, it also includes a second protective cover, and the second protective cover is sleeved outside the mutual inductor.

[0015] As a further improvement of the present invention, the first protective cover is arranged in an inverted "L" shape, and the second protective cover is arranged below the first protective cover and continues in the direction of the wiring terminal.

[0016] As a further improvement of the present invention, the mutual inductor comprises an electromagnetic magnetic ring and an electronic magnetic ring, the second protective cover covers the electromagnetic magnetic ring and the electronic magnetic ring, and the electromagnetic magnetic ring and the electronic magnetic ring are both installed vertically.

[0017] As a further improvement of the utility model, a protective plate is provided between the circuit board and the wiring terminals.

[0018] As a further improvement of the utility model, the operating mechanism includes an operating frame, the operating frame is provided with a horizontal mounting column, the releaser is arranged on the horizontal mounting column and fits with the operating frame, and the releaser is outer-covered with a third protective cover.

[0019] As a further improvement of the utility model, it also includes:

[0020] A stopper is arranged on the base, and the second protective cover is provided with a stopper shoulder which abuts against the stopper;

[0021] The positioning column is arranged on the base, and the second protective cover is provided with a positioning hole for the positioning column to pass through.

[0022] The beneficial effect of the utility model is that the circuit board is arranged vertically and the space under the operating mechanism is reasonably utilized, which greatly reduces the width of the product, so that the same specification distribution box can be equipped with more leakage circuit breakers. The utility model also has the advantages of simple structure, convenient assembly, reliable action, long service life, etc. 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 The figure is a schematic diagram of the explosion structure of an embodiment of the utility model.

[0025] Attached Figure 3 It is a schematic diagram of the explosion structure at the base of an embodiment of the utility model.

[0026] Attached Figure 4 It is a schematic diagram of the explosion structure at the release of an embodiment of the utility model.

[0027] In the figure, 1, shell; 11, upper cover; 12, base; 121, stopper; 122, positioning column; 2, contact system; 3, operating mechanism; 31, operating frame; 32, horizontal mounting column; 4, mutual inductor; 41, electromagnetic magnetic ring; 42, electronic magnetic ring; 5, circuit board; 6, release; 7, terminal; 81, first protective cover; 82, second protective cover; 821, shoulder; 822, positioning hole; 83, protective plate; 84, third protective cover. DETAILED DESCRIPTION

[0028] The following is a further description of the embodiments of the present invention in conjunction with the accompanying drawings:

[0029] Depend on Figure 1 Combination Figure 2-4 As shown, a compact leakage circuit breaker includes a housing 1, wherein the housing 1 includes an upper cover 11 and a base 12, and further includes:

[0030] The contact system 2 is arranged in the housing 1 and is used to connect or disconnect the circuit in the housing 1;

[0031] The operating mechanism 3 is arranged in the housing 1 and is used to drive the contact system 2 to move;

[0032] The mutual inductor 4 is used to detect leakage current and is arranged in the space below the operating mechanism 3;

[0033] The circuit board 5 is arranged in the housing 1, and the mutual inductor 4 is electrically connected to the circuit board 5;

[0034] The trip device 6 is arranged side by side with the operating mechanism 3 and is arranged in the space above the transformer 4;

[0035] The wiring terminal 7 is used for incoming or outgoing lines; the circuit board 5 is arranged vertically, and the circuit board 5 is arranged between the wiring terminal 7 and the transformer 4 and arranged vertically. The beneficial effect of the utility model is that the circuit board is arranged vertically and the space under the operating mechanism is reasonably utilized, which greatly reduces the width of the product, so that the same specification distribution box can be equipped with more leakage circuit breakers. The utility model also has the advantages of simple structure, convenient assembly, reliable operation, and long service life. The size of the utility model is reduced by 33%, more leakage components can be assembled, and the operating cost is reduced; the installation size guide rail installation is the same, and the degree of standardization is high.

[0036] The width of the housing 1 is less than 40 mm. Specifically, the width of the housing 1 is 36 mm. The width of the original 2P function leakage circuit breaker is 54 mm, and after the new structure layout design, it is 36 mm, so that the original 60 distribution boxes of the same specification can be installed with 30 more, reaching 90.

[0037] The utility model also includes a first protective cover 81, and the first protective cover 81 is sleeved on the outside of the circuit board 5. Specifically, the utility model also includes a second protective cover 82, and the second protective cover 82 is sleeved on the outside of the mutual inductor 4. Specifically, the first protective cover and the second protective cover can be plastic covers or metal covers or a combination of plastic covers and metal covers. In the utility model, the first protective cover and the second protective cover both include a plastic cover and a metal cover, and the metal cover is sleeved on the outside of the plastic cover. The plastic cover can provide three protections for the customer's electronic components: moisture-proof design, salt spray-proof design, and mildew-proof design. The metal shell can improve electromagnetic compatibility. Through surge and pulse group tests on the product, the product functions normally and reliably, and there is no feedback from customers of the original product that the leakage protection value is inaccurate or drifting, or even failure occurs.

[0038] The first protective cover 81 is arranged in an inverted "L" shape, and the second protective cover 82 is arranged below the first protective cover 81 and is arranged continuously in the direction of the wiring terminal 7. Specifically, a protective plate 83 is arranged between the circuit board 5 and the wiring terminal 7. More specifically, the mutual inductor 4 includes an electromagnetic magnetic ring 41 and an electronic magnetic ring 42, and the second protective cover 82 is covered outside the electromagnetic magnetic ring 41 and the electronic magnetic ring 42, and the electromagnetic magnetic ring 41 and the electronic magnetic ring 42 are both installed vertically. More specifically, the electromagnetic magnetic ring is connected to the release through a driving capacitor, the driving capacitor is arranged on the circuit board, and the electronic magnetic ring is connected to the release through the circuit board and is used to drive the release to operate. Such a structure can control the release to operate and release through the driving circuit on the circuit board, and has a simple structure, reliable detection, convenient release, and higher safety. The mutual inductor voltage of the utility model depends on the grid voltage, performs full current sampling on the main circuit, and detects high-frequency AC fault residual current, pulsating DC residual current and smooth DC residual current. The mutual inductor of the utility model is independent of the grid voltage, performs electromagnetic current sampling on the main circuit, and detects the power frequency AC residual current and the pulsating DC residual current. The circuit board is arranged between the operating mechanism and the wiring terminal, and the protective plate is arranged between the circuit board and the wiring terminal, which greatly reduces the installation space, avoids the horizontal installation of the circuit board, and reduces the width of the product. The mutual inductor is installed vertically to facilitate the wire to pass through, reduce the product volume, and facilitate installation and fixation.

[0039] The operating mechanism 3 includes an operating frame 31, a horizontal mounting column 32 is provided on the operating frame 31, the release 6 is provided on the horizontal mounting column 32 and fits the operating frame 31, and a third protective cover 84 is provided on the outer cover of the release 6. Such a structure facilitates the installation of the release and has a simple structure.

[0040] The utility model also includes:

[0041] The stopper 121 is disposed on the base 12, and the second protective cover 82 is provided with a stopper shoulder 821 that abuts against the stopper 121;

[0042] The positioning column 122 is arranged on the base 12, and the second protective cover 82 is provided with a positioning hole 822 for the positioning column 122 to pass through. Such a structure can realize reliable positioning of the product, especially the positioning of the mutual inductor can be realized by limiting the positioning of the second protective cover to prevent the mutual inductor from shaking.

[0043] 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.

[0044] 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.

[0045] 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. A compact residual current circuit breaker, comprising a housing (1), wherein the housing (1) comprises an upper cover (11) and a base (12), characterized in that Also included: A contact system (2) is disposed in the housing (1) and is used to connect or disconnect the circuit in the housing (1); An operating mechanism (3) is disposed in the housing (1) and is used to drive the contact system (2) to move; A mutual inductor (4), used for detecting leakage current; and arranged in the space below the operating mechanism (3); A circuit board (5) is arranged in the housing (1), and the mutual inductor (4) is electrically connected to the circuit board (5); A release (6) is arranged side by side with the operating mechanism (3) and is arranged in the space above the mutual inductor (4); The wiring terminal (7) is used for incoming or outgoing wires; the circuit board (5) is arranged vertically, and the circuit board (5) is arranged between the wiring terminal (7) and the transformer (4) and is arranged vertically.

2. A compact residual current circuit breaker according to claim 1, characterized in that The width of the shell (1) is less than 40 mm.

3. A compact leakage circuit breaker according to claim 2, characterized in that The width of the shell (1) is 36 mm.

4. A compact residual current circuit breaker according to claim 1, characterized in that It also comprises a first protective cover (81), wherein the first protective cover (81) is sleeved outside the circuit board (5).

5. A compact residual current circuit breaker according to claim 4, characterized in that It also includes a second protective cover (82), wherein the second protective cover (82) is sleeved outside the mutual inductor (4).

6. A compact residual current circuit breaker according to claim 5, characterized in that The first protective cover (81) is arranged in an inverted "L" shape, and the second protective cover (82) is arranged below the first protective cover (81) and is arranged continuously in the direction of the connection terminal (7).

7. A compact residual current circuit breaker according to claim 5, characterized in that The mutual inductor (4) comprises an electromagnetic magnetic ring (41) and an electronic magnetic ring (42), the second protective cover (82) covers the electromagnetic magnetic ring (41) and the electronic magnetic ring (42), and the electromagnetic magnetic ring (41) and the electronic magnetic ring (42) are both installed vertically.

8. A compact residual current circuit breaker according to claim 1, characterized in that A protective plate (83) is provided between the circuit board (5) and the wiring terminal (7).

9. A compact residual current circuit breaker according to claim 1, characterized in that The operating mechanism (3) comprises an operating frame (31), the operating frame (31) is provided with a horizontal mounting column (32), the releaser (6) is arranged on the horizontal mounting column (32) and fits with the operating frame (31), and the outer cover of the releaser (6) is provided with a third protective cover (84).

10. A compact residual current circuit breaker according to claim 5, characterized in that Also includes: A stopper (121) is provided on the base (12), and a stopper shoulder (821) is provided on the second protective cover (82) for contact with the stopper (121); The positioning column (122) is disposed on the base (12), and the second protective cover (82) is provided with a positioning hole (822) for the positioning column (122) to pass through.

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