Residual-current circuit breaker

Abstract

Provided is a residual-current circuit breaker. Mainly solves the problem that the N pole of the current residual-current circuit breaker does not have an economical structure with certain arc extinguishing capability. The structure is characterized in that the structure also comprises a mounting part which is arranged in the N-pole chamber; the run-on plate (24) is arranged in the N-pole chamber and is opposite to the static contact piece; and the arc extinguishing grid sheet is detachably connected with the mounting part and is arranged between the run-on plate and the static contact sheet. The utility model provides a residual-current circuit breaker which is convenient to install, low in cost and capable of meeting the arc extinguishing requirement of an N pole.

Description

Technical Field

[0001] This utility model relates to the field of switchgear, specifically to a residual current circuit breaker. Background Technology

[0002] Due to the limited space available for the N pole of a residual current circuit breaker (RCCB), it is difficult to install an arc-extinguishing chamber. As shown in Chinese patent publication number CN 219716790 U, an arc-extinguishing chamber is generally not installed, or a specially designed small arc-extinguishing chamber is used, which requires additional costs. Utility Model Content

[0003] In order to overcome the shortcomings of the prior art, this utility model provides a residual current circuit breaker, which mainly solves the problem that the N pole of the current residual current circuit breaker does not have a structure that is both economical and has a certain arc extinguishing capability.

[0004] The technical solution of this utility model is as follows:

[0005] A residual current circuit breaker includes a housing, within which are an N-pole chamber and an L-pole chamber. The N-pole chamber contains a stationary contact and a moving contact disposed opposite to each other.

[0006] The mounting part is located in the N-pole cavity;

[0007] An arc-inducing plate is disposed in the N-pole cavity and is positioned opposite to the stationary contact piece;

[0008] An arc-extinguishing grid plate is detachably connected to the mounting part and is disposed between the arc-inducing plate and the stationary contact plate.

[0009] The stationary contact plate includes a mounting plate and an extension plate. The mounting plate is provided with a stationary contact point, and the extension plate is arranged parallel to the arc-inducing plate.

[0010] The N-pole cavity is provided with a baffle wall, and a mounting groove is formed between the two baffle walls. The mounting groove is the mounting part.

[0011] The arc-extinguishing grid includes a Y-shaped opening facing the moving contact.

[0012] The N-pole cavity is provided with a buffer groove, and the housing is provided with an air outlet that communicates with the buffer groove.

[0013] The N-pole cavity is provided with two guide walls, which have a structure with one end larger and the other end smaller. The larger end faces the arc-extinguishing grid plate, and the smaller end faces the buffer groove.

[0014] The N-pole cavity is provided with a positioning groove, and one end of the arc-guiding plate is located in the positioning groove.

[0015] The N-pole cavity is provided with a platform, and a slot is provided on one side of the platform. The upper end of the mounting plate is bent and placed on the platform, and it is provided with a insert for insertion into the slot.

[0016] The L-electrode cavity is provided with a second stationary contact piece, the second stationary contact piece is provided with a second insert piece, and the L-electrode cavity is provided with a second slot that cooperates with the second insert piece.

[0017] The beneficial effects of this utility model are: This utility model provides a leakage circuit breaker that is easy to install, has a low cost, and can meet the arc extinguishing requirements of the N pole. Attached Figure Description

[0018] Figure 1 This is an internal perspective view of one embodiment of the present utility model.

[0019] Figure 2 for Figure 1 Enlarged diagram of point A in the middle.

[0020] Figure 3 This is a partial perspective view of one embodiment of the present invention.

[0021] Figure 4 This is a partial perspective view of one embodiment of the present invention. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings. A residual current circuit breaker includes a housing, wherein an N-pole chamber 1 and an L-pole chamber 2 are provided inside the housing, and a stationary contact 21 and a moving contact 22 are provided in opposite directions inside the N-pole chamber. The circuit breaker also includes a mounting part disposed in the N-pole chamber; and an arc-starting plate 24 disposed in the N-pole chamber and disposed opposite to the stationary contact.

[0023] An arc-extinguishing grid plate is detachably connected to the mounting part and is disposed between the arc-initiating plate and the stationary contact plate. This arc-extinguishing grid plate can use the same type of grid plate found in the L-pole chamber, offering strong versatility. During installation, it is installed via the mounting part, which can be located on both inner walls of the N-pole chamber. When an arc is generated, it is extinguished by the arc-initiating plate, the arc-extinguishing grid plate, and the stationary contact plate.

[0024] In this embodiment, as shown in the figure, the stationary contact piece includes a mounting piece 211 and an extension piece 212. The mounting piece is provided with a stationary contact point, and the extension piece is arranged parallel to the arc-guiding plate. The mounting piece and the extension piece are integrally manufactured and can be bent or otherwise constructed.

[0025] In this embodiment, as shown in the figure, the N-pole cavity is provided with a baffle 20, and a mounting groove 201 is formed between the two baffles. The mounting groove is the mounting part. After one section of the arc-extinguishing grid plate is inserted, it will be limited by the mounting groove, making installation relatively convenient; it only requires simple insertion.

[0026] In this embodiment, as shown in the figure, the arc-extinguishing grid includes a Y-shaped opening 31, which faces the moving contact. This provides better arc extinguishing.

[0027] In this embodiment, as shown in the figure, a buffer groove 25 is provided in the N-pole chamber, and an air outlet 26 communicating with the buffer groove is provided on the housing. Gas will not rush out directly, increasing safety during use.

[0028] In this embodiment, as shown in the figure, the N-pole cavity is provided with two guide walls 261. The guide walls have a structure with one end larger and the other end smaller, with the larger end facing the arc-extinguishing grid and the smaller end facing the buffer groove. This serves as a guide.

[0029] In this embodiment, as shown in the figure, a positioning groove 27 is provided in the N-pole cavity, and one end of the arc-starting plate is disposed in the positioning groove. The arc-starting plate is positioned to prevent shaking, and one end of the arc-starting plate can be welded to the terminal piece.

[0030] In this embodiment, as shown in the figure, a platform 28 is provided in the N-pole cavity, and a slot 29 is provided on one side of the platform. The upper end of the mounting piece is bent and placed on the platform, and it is provided with an insert 2111 for insertion into the slot. This facilitates installation and ensures structural stability.

[0031] In this embodiment, as shown in the figure, a second stationary contact piece 11 is provided in the L-electrode cavity, and a second insert piece 111 is provided on the second stationary contact piece. A second slot 112 that mates with the second insert piece is provided in the L-electrode cavity. The product is installed upright during maintenance, and the structure of the insert piece and slot ensures its stable installation and prevents it from falling.

[0032] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0033] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0034] The embodiments described with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention. The embodiments should not be considered as limitations on the present invention, but any improvements made based on the spirit of the present invention should be within the protection scope of the present invention.

Claims

1. An electric leakage circuit breaker comprising a housing, an N-pole chamber (1) and an L-pole chamber (2) are arranged in the housing, a static contact (21) and a moving contact (22) are arranged in the N-pole chamber oppositely, characterized in that: Also include The installation part is arranged in the N-pole chamber; The arc striking plate (24) is arranged in the N-pole chamber and is arranged opposite to the static contact piece; The arc extinguishing grid piece is detachably connected with the installation part and is arranged between the arc striking plate and the static contact piece.

2. An electrical leakage circuit breaker according to claim 1, characterised in that: The static contact piece comprises an installation piece (211) and an extension piece (212), the installation piece is provided with a static contact point, and the extension piece is arranged in parallel with the arc striking plate.

3. An electrical leakage circuit breaker according to claim 2, wherein: The N-pole chamber is provided with a blocking wall (20), two blocking walls form an installation groove (201) therebetween, and the installation groove is the installation part.

4. An electrical leakage circuit breaker according to claim 3, wherein: The arc extinguishing grid piece comprises a Y-shaped opening (31), and the opening faces the moving contact.

5. An electrical leakage circuit breaker according to claim 4, wherein: The N-pole chamber is provided with a buffer groove (25), and the shell is provided with an air outlet hole (26) in communication with the buffer groove.

6. An electrical leakage circuit breaker according to claim 5, wherein: The N-pole chamber is provided with two guide walls (261), one end of the guide wall is larger and the other end is smaller, the larger end faces the arc extinguishing grid piece, and the smaller end faces the buffer groove.

7. An electrical leakage circuit breaker according to claim 6, characterised in that: The N-pole chamber is provided with a positioning groove (27), and one end of the arc striking plate is arranged in the positioning groove.

8. An electrical leakage circuit breaker according to claim 7, characterised in that: The N-pole chamber is provided with a platform (28), one side of the platform is provided with a slot (29), the upper end of the installation piece is bent and placed on the platform and is provided with an insertion piece (2111) inserted into the slot.

9. An electrical leakage circuit breaker according to claim 8, wherein: The L-pole chamber is provided with a second static contact piece (11), the second static contact piece is provided with a second insertion piece (111), and the L-pole chamber is provided with a second slot (112) matched with the second insertion piece.

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