An electrical leakage circuit breaker mutual inductance rear part

Abstract

The utility model discloses a kind of leakage circuit breaker mutual inductance rear parts, to provide a kind of structural stable, safety performance is good circuit breaker mutual inductance rear parts, its technical scheme main point is including conducting portion and baffle portion, the conducting portion includes left connecting plate, right connecting plate and the middle connecting plate between the both, the baffle portion includes link plate, insulating baffle fixed in the front of link plate and the iron support setting in the rear of link plate, the side plate of the iron support bottom is fixed between insulating baffle and link plate, the left connecting plate, right connecting plate and middle connecting plate are all composed of fixed plate and extension arm, the extension arm shape of the left connecting plate, right connecting plate is U type and about middle connecting plate symmetrical distribution, the utility model is applicable to electrical equipment technical field.

Description

Technical Field

[0001] This utility model relates to a current transformer downstream component of a residual current circuit breaker, and more specifically, it relates to a current transformer downstream component of a circuit breaker with stable structure and good safety performance. Background Technology

[0002] Circuit breakers are important equipment in low-voltage power distribution systems. They can protect electrical equipment and lines from overcurrent faults and disconnect the circuit in time when a fault occurs, thus protecting equipment and personal safety. Circuit breakers are usually used in conjunction with instrument transformers to convert high voltage to low voltage and large current to small current for measurement or protection systems.

[0003] Currently, existing current transformers usually need to be used in conjunction with other accessories such as conductors. Current transformers can detect conductors, and the ports of conductors need to be insulated. The existing insulation methods are not very useful when circuit faults occur, and the creepage distance between conductors is insufficient, posing a safety hazard. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a circuit breaker mutual inductor downstream component with stable structure and good safety performance.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a component after mutual inductance of a residual current circuit breaker, comprising a conductive part and a baffle part, characterized in that the conductive part includes a left connecting plate, a right connecting plate, and a middle connecting plate located between the two; the baffle part includes a connecting plate, an insulating baffle fixed in front of the connecting plate, and an iron bracket disposed behind the connecting plate; the side plate at the bottom of the iron bracket is fixed between the insulating baffle and the connecting plate; the left connecting plate, the right connecting plate, and the middle connecting plate are all composed of a fixed plate and an extension arm; the extension arms of the left connecting plate and the right connecting plate are U-shaped and symmetrically distributed about the middle connecting plate.

[0006] By adopting the above technical solution, the conductive part of this utility model is divided into three connecting plates, which can improve the reliability of the conductive part and has more advantages in fixing the current transformer. The baffle part includes a connecting plate, an insulating baffle, and an iron bracket. The connecting plate is used to connect the conductive part, the insulating baffle is used to increase the minimum creepage distance, and the iron bracket is used to improve the stability of the current transformer component. Moreover, the extension arms of the left connecting plate and the right connecting plate in the three connecting plates are U-shaped and symmetrically arranged, which can further improve the stability of the current transformer and also extend the length of the conductive part to improve the reliability of the circuit.

[0007] The present invention is further configured such that one end of the extension arm is fixedly connected to the fixing plate, and the other end is fixed to the upper end of the connecting plate.

[0008] By adopting the above technical solution, fixing the two ends of the extension arm to the upper end of the fixing plate and the connecting plate respectively can improve the connection stability of the conductive part and the baffle part, and improve the structural reliability of the overall component.

[0009] The present invention is further configured such that: the iron bracket also includes two side plates and a horizontal plate located between the two side plates, and a pair of downward-facing clips are fixed on the inner side of the side plates.

[0010] By adopting the above technical solution, the iron bracket can cooperate with external parts by having two side plates and a horizontal plate located between the two side plates. The component can be fixed in a designated position by clamping the side plates and the horizontal plate. A pair of downward-facing clips are also fixed on the inner side of the side plates, which can cooperate with the corresponding protrusions of the external equipment to enhance stability.

[0011] The present invention is further configured such that: the bottom of the connecting plate is bent inward to form a support portion perpendicular to the main structure, and the support portion is provided with mounting holes.

[0012] By adopting the above technical solution, the bottom of the connecting plate is bent to form a support part, and the support part is provided with mounting holes, so that the installation direction is the same as the gravity direction, making it less likely for the whole to shift from external parts after installation.

[0013] The present invention is further configured such that: the fixing plate has a main screw hole and two auxiliary screw holes, and the radius ratio of the main screw hole and the auxiliary screw holes is between 2 and 2.5.

[0014] By adopting the above technical solution, the main screw hole and the auxiliary screw hole provided on the fixing plate can improve the connection and fixing effect between the fixing plate and other parts, and the radius ratio of the main screw hole and the auxiliary screw hole is between 2 and 2.5, which can improve the installation accuracy and further improve the connection strength.

[0015] The present invention is further configured such that: an insulating sleeve is fixed on the connecting plate, and the insulating sleeve wraps around one end of the extension arm.

[0016] By adopting the above technical solution, the insulating sleeve fixed on the connecting plate can further improve the insulation effect. When the circuit fails, the insulation effect is better than that of conventional components, and it can also improve the connection strength between the extension arm and the connecting plate.

[0017] The present invention is further configured such that: the extension arm is made of copper-aluminum composite material and its surface is coated with an anti-oxidation coating.

[0018] By adopting the above technical solution, the copper-aluminum composite material selected for the extension arm has excellent electrical and thermal conductivity. The anti-oxidation coating sprayed on its surface ensures that it is not easily oxidized and aged after long-term use, effectively extending its service life and making it more reliable. Attached Figure Description

[0019] Figure 1 This is a perspective view of an embodiment of the mutual inductance component of the residual current circuit breaker of this utility model;

[0020] Figure 2 This is a structural schematic diagram of the baffle section;

[0021] Figure 3 This is a schematic diagram of the conductive part;

[0022] The attached diagrams are labeled as follows: 1. Left connecting plate; 2. Right connecting plate; 3. Middle connecting plate; 4. Connecting plate; 41. Support part; 42. Mounting hole; 5. Insulating baffle; 6. Iron bracket; 61. Side plate; 62. Horizontal plate; 63. Clip; 7. Fixing plate; 8. Extension arm; 9. Main screw hole; 10. Secondary screw hole; 11. Insulating sleeve; Detailed Implementation

[0023] Reference Figures 1 to 3 The embodiments of the mutual inductance component of the leakage circuit breaker of this utility model are further described.

[0024] For ease of explanation, spatial relative terms such as “up,” “down,” “left,” and “right” are used in the embodiments to describe the relationship of one element or feature shown in the figures relative to another element or feature. It should be understood that, in addition to the orientations shown in the figures, spatial terms are intended to include different orientations of the device in use or operation. For example, if the device in the figures is inverted, an element described as being “down” of other elements or features would be positioned “up” of those other elements or features. Therefore, the exemplary term “down” can encompass both up and down orientations. The device may be positioned in other ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0025] Moreover, relational terms such as “first” and “second” are used merely to distinguish one component from another that has the same name, without necessarily requiring or implying any such actual relationship or order between the components.

[0026] A component after mutual inductance in a residual current circuit breaker includes a conductive part and a baffle part. The conductive part comprises a left connecting plate 1, a right connecting plate 2, and a middle connecting plate 3 located between them. The baffle part includes a connecting plate 4, an insulating baffle 5 fixed in front of the connecting plate 4, and an iron bracket 6 disposed behind the connecting plate 4. A side plate 61 at the bottom of the iron bracket 6 is fixed between the insulating baffle 5 and the connecting plate 4. The left connecting plate 1, the right connecting plate 2, and the middle connecting plate 3 are all composed of a fixing plate 7 and an extension arm 8. The extension arms 8 of the left connecting plate 1 and the right connecting plate 2 are U-shaped. The conductive part of this utility model is divided into three connecting plates, which can improve the reliability of the conductive part and has more advantages in fixing the current transformer. The baffle part includes a connecting plate 4, an insulating baffle 5, and an iron bracket 6. The connecting plate 4 is used to connect the conductive part, the insulating baffle 5 is used to increase the minimum creepage distance, and the iron bracket 6 is used to improve the stability of the current transformer component. Moreover, the extension arms 8 of the left connecting plate 1 and the right connecting plate 2 are U-shaped and symmetrically arranged, which can further improve the stability of the current transformer and extend the length of the conductive part to improve the reliability of the circuit.

[0027] Specifically, one end of the extension arm 8 is fixedly connected to the fixing plate 7, and the other end is fixed to the upper end of the connecting plate 4. The two ends of the extension arm are fixed to the upper ends of the fixing plate 7 and the connecting plate 4 respectively, which can improve the connection stability of the conductive part and the baffle part and improve the structural reliability of the overall component. The fixing plate 7 is also provided with a main screw hole 9 and two auxiliary screw holes 10. The radius ratio of the main screw hole 9 and the auxiliary screw holes 10 is between 2 and 2.5. The main screw hole 9 and the auxiliary screw holes 10 provided on the fixing plate 7 can improve the connection and fixing effect between the fixing plate 7 and other parts. Moreover, the radius ratio of the main screw hole 9 and the auxiliary screw holes 10 is between 2 and 2.5, which can improve the installation accuracy and further improve the connection strength. When the ratio is greater than 2.5, the radius of the bolt matching the auxiliary screw hole 10 will be too small, and the connection strength will be insufficient. When the ratio is less than 2, the radius values ​​of the main screw hole 9 and the auxiliary screw hole 10 will be close, which will easily lead to confusion during installation.

[0028] Preferably, an insulating sleeve 11 is fixed on the connecting plate 4, and the insulating sleeve 11 wraps around one end of the extension arm 8. The insulating sleeve 11 fixed on the connecting plate 4 can further improve the insulation effect. When the circuit fails, the insulation effect is better than that of conventional components. It can also improve the connection strength between the extension arm 8 and the connecting plate 4. The extension arm 8 is made of copper-aluminum composite material, and its surface is coated with anti-oxidation coating. The selected copper-aluminum composite material has excellent electrical and thermal conductivity. The anti-oxidation coating on its surface ensures that it is not easily oxidized and aged after long-term use, effectively extending its service life and improving its reliability.

[0029] Specifically, the iron bracket 6 also includes two side plates 61 and a horizontal plate 62 located between the two side plates 61. A pair of downward-facing clips 63 are fixed to the inner side of the side plates 61. The iron bracket 6 can cooperate with external parts by having two side plates 61 and a horizontal plate 62 located between the two side plates 61. The component can be fixed in a designated position by clamping the side plates 61 and the horizontal plate 62. The pair of downward-facing clips 63 fixed to the inner side of the side plates 61 can cooperate with the corresponding protrusions of external equipment to enhance stability. The bottom of the connecting plate 4 is bent inward to form a support part 41 perpendicular to the main structure. The support part 41 is provided with mounting holes 42. The bottom of the connecting plate 4 is bent to form the support part 41. The support part 41 is provided with mounting holes 42 so that the installation direction is the same as the direction of gravity, making it less likely for the whole to shift from the external parts after installation.

[0030] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any ordinary changes and substitutions made by those skilled in the art within the scope of the technical solution of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A component after mutual inductance in a residual current circuit breaker, comprising a conductive part and a baffle part, characterized in that, The conductive part includes a left connecting plate (1), a right connecting plate (2) and a middle connecting plate (3) located between the two. The baffle part includes a connecting plate (4), an insulating baffle (5) fixed in front of the connecting plate (4) and an iron bracket (6) set behind the connecting plate (4). The side plate (61) at the bottom of the iron bracket (6) is fixed between the insulating baffle (5) and the connecting plate (4). The left connecting plate (1), the right connecting plate (2) and the middle connecting plate (3) are all composed of a fixed plate (7) and an extension arm (8). The extension arms (8) of the left connecting plate (1) and the right connecting plate (2) are U-shaped and symmetrically distributed about the middle connecting plate (3).

2. The component after mutual inductance in a residual current circuit breaker according to claim 1, characterized in that, One end of the extension arm (8) is fixedly connected to the fixing plate (7), and the other end is fixed to the upper end of the connecting plate (4).

3. The component after mutual inductance in a residual current circuit breaker according to claim 1, characterized in that, The iron bracket (6) also includes two side plates (61) and a cross plate (62) located between the two side plates (61). A pair of downward-facing clips (63) are also fixed inside the side plates (61).

4. The component after mutual inductance in a residual current circuit breaker according to claim 1, characterized in that, The bottom of the connecting plate (4) is bent inward to form a support part (41) perpendicular to the main structure, and the support part (41) is provided with mounting holes (42).

5. A component after mutual inductance in a residual current circuit breaker according to claim 1, characterized in that, The fixing plate (7) has a main screw hole (9) and two auxiliary screw holes (10), and the radius ratio of the main screw hole (9) and the auxiliary screw holes (10) is between 2 and 2.

5.

6. The component after mutual inductance in a residual current circuit breaker according to claim 1, characterized in that, An insulating sleeve (11) is fixed on the connecting plate (4), and the insulating sleeve (11) wraps one end of the extension arm (8) therein.

7. A component after mutual inductance in a residual current circuit breaker according to claim 1, characterized in that, The extension arm (8) is made of copper-aluminum composite material and its surface is coated with an anti-oxidation coating.

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