Zero-sequence current transformer assembly with quick plug-in mounting function

Abstract

The utility model discloses a zero sequence current transformer assembly with a quick plug-in mounting function, which comprises a transformer body, the transformer body is mounted on a circuit board, and the transformer body is mounted on the circuit board through a fixed connection structure; the fixed connection structure comprises a support structure used for installing the mutual inductor body and an auxiliary structure used for helping a null line and a live line of an electric appliance to penetrate through the inner circle of the mutual inductor body. By means of the mode, the zero-sequence current transformer assembly with the quick plug-in mounting function is of a fixed connection structure, the zero-sequence current transformer is mounted on the circuit board in a plug-in mounting mode, and therefore the mounting efficiency of the zero-sequence current transformer and the circuit board can be improved.

Description

Technical Field

[0001] The utility model relates to the field of anti-electric leakage protection products, in particular to a zero-sequence current transformer assembly with a quick plug-in function. Background Technique

[0002] A zero-sequence current transformer is a sensor used to measure the zero-sequence current in a power system. In a three-phase power system, the zero-sequence current refers to the current passing through the neutral point (or zero-sequence wire), which is usually caused by unbalanced loads, faults, or ground wire faults. A zero-sequence current transformer usually consists of a toroidal core and a coil wound around it. When the zero-sequence current passing through the neutral point flows through the coil, it generates a magnetic field in the core, and the winding on the coil converts this magnetic field into a voltage signal proportional to the zero-sequence current. This voltage signal can be used to measure and monitor the magnitude of the zero-sequence current. Zero-sequence current transformers are usually used together with protection devices to detect and respond to faults in the power system in a timely manner. They can be used to detect ground faults, phase sequence errors, unbalanced loads, and other problems related to zero-sequence current.

[0003] In order to prevent the existing zero-sequence current transformer from being displaced or damaged due to loose fixation when subjected to vibration or impact, resulting in the zero-sequence current transformer being unable to correctly detect the zero-sequence current and ultimately losing the protection function for system ground faults, the zero-sequence current transformer is usually fixed on the circuit board by means of screws or adhesives. Some of these installation methods require the use of installation tools for installation, and some require a long installation time, resulting in low installation efficiency. Content of the Utility Model

[0004] The main technical problem to be solved by the utility model is to provide a zero-sequence current transformer assembly with a quick plug-in function, which can improve the installation efficiency of the zero-sequence current transformer and the circuit board.

[0005] To solve the above technical problem, a technical solution adopted by the utility model is: a zero-sequence current transformer assembly with a quick plug-in function, including a transformer body, the transformer body is installed on a circuit board, and the transformer body is installed on the circuit board through a fixed connection structure;

[0006] The fixed connection structure includes a bracket structure for installing the transformer body and an auxiliary structure for helping the neutral wire and live wire of the electrical appliance to penetrate the inner circle of the transformer body.

[0007] In a preferred embodiment of the utility model, the bracket structure includes a bottom plate, an installation groove and a connection seat are provided at the top of the bottom plate, the transformer body is placed in the installation groove, both ends of the coil in the transformer body pass through the connection seat and then penetrate the circuit board, and positioning columns matched with the positioning holes on the circuit board are also provided at the bottom of the bottom plate.

[0008] In a preferred embodiment of the present utility model, an arc plate is provided on the front surface of the installation groove, and a first buckle is provided at the lower end of the arc plate on the bottom of the bottom plate, and the first buckle is matched with the buckle hole on the surface of the circuit board.

[0009] In a preferred embodiment of the present utility model, a back plate and a second buckle are provided on the back surface of the installation groove, and the second buckle is matched with the current transformer body.

[0010] In a preferred embodiment of the present utility model, baffles and third buckles are respectively provided on both sides of the installation groove, an arc-shaped groove matched with the arc plate is provided on the baffle, and the third buckle is matched with the convex block on the current transformer body.

[0011] In a preferred embodiment of the present utility model, the auxiliary structure includes a current transformer zero-line input copper sheet and a current transformer live-line input copper sheet. The current transformer zero-line input copper sheet and the current transformer live-line input copper sheet have the same structure, and both are composed of two symmetric connecting pieces and a through piece for connecting the two connecting pieces. The through piece is connected to the inner circular inner wall of the current transformer body, and the bottom of the connecting piece sequentially penetrates through the bottom plate and the circuit board.

[0012] The beneficial effect of the present utility model is that: the present utility model provides a zero-sequence current transformer assembly with a fast plug-in function. The assembly adopts a fixed connection structure, and the zero-sequence current transformer is installed on the circuit board by means of plugging, thereby improving the installation efficiency of the zero-sequence current transformer and the circuit board. Description of the Drawings

[0013] Figure 1 It is a perspective view of a zero-sequence current transformer assembly with a fast plug-in function from one angle.

[0014] Figure 2 It is a perspective view of a zero-sequence current transformer assembly with a fast plug-in function from another angle.

[0015] Figure 3 It is an exploded view of a zero-sequence current transformer assembly with a fast plug-in function.

[0016] The marks of each component in the drawings are as follows: 1, current transformer body; 2, circuit board; 3, bottom plate; 4, installation groove; 5, connection seat; 6, positioning column; 7, arc plate; 8, first buckle; 9, back plate; 10, second buckle; 11, baffle; 12, third buckle; 13, current transformer zero-line input copper sheet; 14, current transformer live-line input copper sheet; 15, convex block. Detailed Embodiments

[0017] The following elaborates on the preferred embodiments of the present utility model in conjunction with the accompanying drawings, so that the advantages and features of the present utility model can be more easily understood by those skilled in the art, thereby making the scope of protection of the present utility model more clearly defined.

[0018] Please refer to Figures 1 to 3 , a zero-sequence current transformer assembly with a fast plug-in function, including a transformer body 1, the transformer body 1 is installed on a circuit board 2, the transformer body 1 is installed on the circuit board 2 through a fixed connection structure, the fixed connection structure includes a bracket structure for installing the transformer body 1 and an auxiliary structure for helping the neutral wire and live wire of the electrical appliance to penetrate the inner circle of the transformer body 1, and the fixed connection structure installs the transformer body 1 on the circuit board 2 by means of plugging, thereby improving the installation efficiency of the transformer body 1 and the circuit board 2.

[0019] The bracket structure includes a bottom plate 3, an installation groove 4 and a connection seat 5 are provided at the top of the bottom plate 3, the transformer body 1 is placed in the installation groove 4, and the installation groove 4 is used to position and support the transformer body 1.

[0020] Both ends of the coil inside the transformer body 1 pass through the connection seat 5 and then penetrate the circuit board 2, and the connection seat 5 plays a role in wire management.

[0021] Positioning posts 6 are also provided at the bottom of the bottom plate 3 and are matched with the positioning holes on the circuit board 2, and the positioning posts 6 make the positioning more accurate and fast when the bracket structure is connected to the circuit board 2.

[0022] An arc plate 7 is provided on the front of the installation groove 4, and the arc plate 7 is matched with the outside of the transformer body 1 to prevent the transformer body 1 from shaking.

[0023] A first buckle 8 is provided at the bottom of the bottom plate 3 below the arc plate 7, and the first buckle 8 is matched with the buckle hole on the surface of the circuit board 2 for locking after the bracket structure and the circuit board 2 are connected.

[0024] A back plate 9 and a second buckle 10 are provided on the back of the installation groove 4, and the back plate 9 is used for the limit of the back of the transformer body 1, so that after the transformer neutral input copper sheet 13 and the transformer live wire input copper sheet 14 are installed on the transformer body 1, their bottoms can penetrate the corresponding holes on the bottom plate 3, thereby preventing the front and back movement of the transformer body 1.

[0025] The second buckle 10 cooperates with the current transformer body 1. After the current transformer body 1 is placed on the installation groove 4, the second buckle 10 locks the lowermost end of its inner circular wall to prevent the up-and-down movement of the current transformer body 1.

[0026] On both sides of the installation groove 4, a baffle 11 and a third buckle 12 are respectively provided. An arc-shaped groove matching with the arc plate 7 is provided on the baffle 11. The arc-shaped groove extends the length of contact with the side wall of the current transformer body 1 to prevent the current transformer body 1 from shaking.

[0027] The third buckle 12 cooperates with the convex block 15 on the current transformer body 1. The third buckle 12 is located on the side of the connecting seat 5. By cooperating with the top of the installation groove 4 on the same side, a locking groove is formed to lock the convex block 15 and prevent the rotation of the current transformer body 1.

[0028] The auxiliary structure includes a current transformer neutral input copper sheet 13 and a current transformer live input copper sheet 14. The current transformer neutral input copper sheet 13 and the current transformer live input copper sheet 14 have the same structure and are both composed of two symmetric connecting pieces and a through piece for connecting the two connecting pieces. The through piece is connected to the inner circular inner wall of the current transformer body 1. The bottom of the connecting piece sequentially penetrates through the bottom plate 3 and the circuit board 2. The current transformer neutral input copper sheet 13 and the current transformer live input copper sheet 14 are respectively connected to the neutral wire and the live wire of the electrical appliance. By passing through the inner circle of the current transformer body 1, they can respectively flow through the two coils of the current transformer body 1, thereby generating opposite magnetic inductions, so that the magnetic differences in the entire circuit are offset, effectively reducing the magnetic differences in the circuit and improving the performance and stability of the circuit.

[0029] Compared with the prior art, the zero-sequence current transformer assembly of the present utility model with a quick plug-in function adopts a fixed connection structure, and the zero-sequence current transformer is installed on the circuit board by means of plug-in, thereby improving the installation efficiency of the zero-sequence current transformer and the circuit board.

[0030] In the description of the present utility model, it should be noted that the components are all common standard components or components known to those skilled in the art. Their structures and principles can all be known by those skilled in the art through technical manuals or obtained through conventional test methods. The orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. is the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model box is usually placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0031] The above are only the embodiments of the present utility model, and thus do not limit the patent scope of the present utility model. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present utility model, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present utility model.

Claims

1. A zero-sequence current transformer assembly with a quick plug-in function, comprising a transformer body, wherein the transformer body is mounted on a circuit board, and characterized in that: The mutual inductor body is mounted on the circuit board through a fixed connection structure; The fixed connection structure includes a bracket structure for installing the transformer body and an auxiliary structure for helping the neutral wire and the live wire of the electrical appliance to pass through the inner circle of the transformer body; The support structure includes a bottom plate, a mounting groove and a connecting seat are provided on the top of the bottom plate, the transformer body is placed in the mounting groove, two ends of the coil in the transformer body pass through the connecting seat and then pass through the circuit board, and a positioning column is also provided at the bottom of the bottom plate to match the positioning hole on the circuit board; The front side of the mounting groove is provided with an arc plate, and the bottom of the bottom plate is provided with a first buckle at the lower end of the arc plate, and the first buckle matches with the buckle hole on the surface of the circuit board; A back plate and a second buckle are provided on the back of the installation slot, and the second buckle matches with the transformer body; A baffle and a third buckle are respectively provided on both sides of the installation groove, the baffle is provided with an arc groove matched with the arc plate, and the third buckle is matched with a protrusion on the transformer body; The auxiliary structure includes a mutual inductor neutral line input copper sheet and a mutual inductor live line input copper sheet. The mutual inductor neutral line input copper sheet and the mutual inductor live line input copper sheet have the same structure, and are both composed of two symmetrical connecting sheets and a through sheet for connecting the two connecting sheets. The through sheet is connected to the inner circle inner wall of the mutual inductor body, and the bottom of the connecting sheet passes through the base plate and the circuit board in sequence.

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