A low voltage current transformer

Abstract

The utility model relates to the technical field of low -voltage current transformer of through -and -through, concretely is a low -voltage current transformer of through -and -through, the utility model discloses a low -voltage current transformer of through -and -through body, the front of low -voltage current transformer of through -and -through body is provided with first access end and second access end, the both sides fixed connection of low -voltage current transformer of through -and -through body have mounting panel, the lower extreme of mounting panel is provided with pre -fixed subassembly, pre -fixed subassembly includes the limiting ring that fixedly connected in the lower extreme of mounting panel, through setting pre -fixed subassembly, when installing low -voltage current transformer of through -and -through to distribution cabinet, drags low -voltage current transformer of through -and -through, makes the limiting ring insert into the mounting hole on distribution cabinet to low -voltage current transformer of through -and -through pre -fixed to distribution cabinet to the use screw is fixed, and then as far as possible reaches the effect of low -voltage current transformer of through -and -through pre -fixed.

Description

Technical Field

[0001] This utility model relates to the technical field of through-type low-voltage current transformers, and in particular to a through-type low-voltage current transformer. Background Technology

[0002] A through-type low-voltage current transformer is a low-voltage indoor busbar type current transformer with cast iron insulation and plastic shell insulation. It consists of a transformer body, a first connection terminal, a second connection terminal, and a mounting plate. When using the transformer, a meter is connected to the first and second connection terminals via wires. When the primary current flows from P1 through P2 of the transformer body, an alternating magnetic flux is generated in the core. The secondary current flows out from the first connection terminal and into the second connection terminal. According to Faraday's law of electromagnetic induction, this current is measured by the connected meter.

[0003] The inventors discovered in their daily work that when using a through-type low-voltage current transformer, since it is generally installed in a distribution cabinet, the installation process requires aligning the mounting holes on the mounting plate with the mounting holes on the distribution cabinet horizontally and vertically. Then, the worker presses the through-type low-voltage current transformer to keep the mounting holes aligned while tightening the screws to fix it, which can make the whole installation process quite cumbersome. Utility Model Content

[0004] The purpose of this utility model is to solve the problem that in actual use, since through-type low-voltage current transformers are generally installed in distribution cabinets, the installation process requires aligning the mounting holes on the mounting plate with the mounting holes on the distribution cabinet horizontally and vertically, and then the worker presses the through-type low-voltage current transformer to keep the mounting holes aligned while tightening screws to fix it, which may make the whole installation process quite cumbersome. Therefore, a through-type low-voltage current transformer is proposed.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a through-type low-voltage current transformer, comprising a through-type low-voltage current transformer body, wherein a first access terminal and a second access terminal are provided on the front side of the through-type low-voltage current transformer body, and mounting plates are fixedly connected to both sides of the through-type low-voltage current transformer body, wherein a pre-fixing component is provided at the lower end of the mounting plate, the pre-fixing component comprising a limiting ring fixedly connected to the lower end of the mounting plate, the limiting ring being inserted into the distribution cabinet, and the arc surface of the limiting ring being provided with a protrusion.

[0006] The effect achieved by the above components is as follows: by setting the pre-fixing component, when the through-type low-voltage current transformer is installed into the distribution cabinet, the through-type low-voltage current transformer is dragged so that the limiting ring is inserted into the mounting hole on the distribution cabinet, thereby pre-fixing the through-type low-voltage current transformer into the distribution cabinet, and then fixing it with screws, thereby achieving the effect of pre-fixing the through-type low-voltage current transformer as much as possible.

[0007] Preferably, the arc surface of the limiting ring is provided with a sliding groove, the inner wall of the sliding groove is slidably connected with a locking block, the locking block is inserted into the power distribution cabinet, and one side of the locking block is provided with an inclined surface.

[0008] The effect achieved by the above components is as follows: dragging the through-type low-voltage current transformer causes the locking block to contact the distribution cabinet via the inclined surface and be pushed back into the limiting ring, which compresses the elastic mechanism. After the limiting ring is fully inserted into the mounting hole on the distribution cabinet, the elastic mechanism resets, allowing the pin to be inserted into the distribution cabinet, thereby further fixing the through-type low-voltage current transformer.

[0009] Preferably, a spring is fixedly connected to the left end of the card block, and the other end of the spring is fixed to the limiting ring.

[0010] The effect achieved by the above components is as follows: dragging the through-type low-voltage current transformer, so that the card block is pushed back into the limit ring after contacting the distribution cabinet with the inclined surface, so that the elastic mechanism is spring-loaded.

[0011] Preferably, a pull rope is fixedly connected to the left end of the card block, and the pull rope passes through the limiting ring and the mounting plate.

[0012] The effect achieved by the above components is that pulling the pull rope causes the locking block to retract completely into the limiting ring, thereby disassembling the through-type low-voltage current transformer.

[0013] Preferably, the front side of the through-type low-voltage current transformer body is provided with a clamping assembly, which is used to clamp the wires connected to the first access terminal and the second access terminal.

[0014] The effect achieved by the above components is that, by setting up the clamping assembly, the wires connected to the first access terminal and the second access terminal are clamped.

[0015] Preferably, the clamping assembly includes a positioning rod fixedly connected to the front of the through-type low-voltage current transformer body, a pressure rod slidably connected to the arc surface of the positioning rod, and a semi-circular groove is provided on the back of the pressure rod.

[0016] The effect achieved by the above components is that the pressure rod on the positioning rod moves, causing the semi-circular groove to press against the wire, thereby clamping the wires connected to the first and second access terminals.

[0017] Preferably, a screw is rotatably connected to the front side of the through-type low-voltage current transformer body, and the screw and the pressure rod are threaded together.

[0018] The effect achieved by the above components is that turning the screw causes the pressure rod on the positioning rod to move with the help of the positioning rod.

[0019] In summary, the beneficial effects of this utility model are as follows:

[0020] In this invention, by setting a pre-fixing component, when installing the through-type low-voltage current transformer into the distribution cabinet, the through-type low-voltage current transformer is dragged so that the limiting ring is inserted into the mounting hole on the distribution cabinet, thereby pre-fixing the through-type low-voltage current transformer into the distribution cabinet. Then, screws are used to fix it, thus achieving the effect of pre-fixing the through-type low-voltage current transformer as much as possible. This solves the problem that when installing through-type low-voltage current transformers into the distribution cabinet, it is necessary to align the mounting holes on the mounting plate horizontally and vertically with the mounting holes on the distribution cabinet. Then, the worker presses the through-type low-voltage current transformer to keep the mounting holes aligned while tightening screws to fix it, which may make the whole installation process cumbersome. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0022] Figure 2 This is a three-dimensional structural diagram of the clamping assembly of this utility model;

[0023] Figure 3 This is a three-dimensional structural diagram of the cross-section of the pre-fixed component of this utility model.

[0024] Legend: 1. Body of the through-type low-voltage current transformer; 2. Pre-fixed assembly; 3. Clamping assembly; 4. Mounting plate; 5. First access terminal; 6. Second access terminal; 21. Limiting ring; 22. Locking block; 23. Slide groove; 24. Inclined surface; 25. Spring; 26. Pull rope; 31. Pressure rod; 32. Screw; 33. Positioning rod; 34. Semicircular groove. Detailed Implementation

[0025] Reference Figure 1 As shown, this utility model provides a technical solution: a through-type low-voltage current transformer includes a through-type low-voltage current transformer body 1, a first access terminal 5 and a second access terminal 6 are provided on the front of the through-type low-voltage current transformer body 1, and mounting plates 4 are fixedly connected to both sides of the through-type low-voltage current transformer body 1, and a pre-fixing component 2 is provided at the lower end of the mounting plate 4.

[0026] Reference Figure 3As shown, in this embodiment, the pre-fixing component 2 includes a limiting ring 21 fixedly connected to the lower end of the mounting plate 4. The limiting ring 21 is inserted into the distribution cabinet. The arc surface of the limiting ring 21 is provided with a protrusion. By setting the pre-fixing component 2, when the through-type low-voltage current transformer is installed into the distribution cabinet, the through-type low-voltage current transformer is dragged so that the limiting ring 21 is inserted into the mounting hole on the distribution cabinet, thereby pre-fixing the through-type low-voltage current transformer into the distribution cabinet. Then, screws are used for fixing, thereby achieving the function of pre-fixing the through-type low-voltage current transformer as much as possible. The arc surface of the limiting ring 21 is provided with a sliding groove 23. The inner wall of the sliding groove 23 is slidably connected with a locking block 22. The locking block 22 is inserted into the distribution cabinet. One side of the locking block 22 is provided with an inclined surface 24. Dragging the through-type low-voltage current transformer so that the locking block 22 is inserted into the distribution cabinet. The inclined surface 24 is provided on one side of the locking block 22. 2. After contacting the distribution cabinet via the inclined plane 24, the device is pushed back into the limiting ring 21, compressing the elastic mechanism. Once the limiting ring 21 is fully inserted into the mounting hole on the distribution cabinet, the elastic mechanism resets, allowing the pin to be inserted into the distribution cabinet, further securing the through-type low-voltage current transformer. A spring 25 is fixedly connected to the left end of the locking block 22, and the other end of the spring 25 is fixed to the limiting ring 21. Dragging the through-type low-voltage current transformer causes the locking block 22 to contact the distribution cabinet via the inclined plane 24 and be pushed back into the limiting ring 21, compressing the elastic mechanism. A pull rope 26 is fixedly connected to the left end of the locking block 22, passing through the limiting ring 21 and the mounting plate 4. Pulling the pull rope 26 causes the locking block 22 to fully retract into the limiting ring 21, thereby disassembling the through-type low-voltage current transformer.

[0027] Reference Figure 2 As shown in this embodiment: A clamping assembly 3 is provided on the front side of the through-type low-voltage current transformer body 1. The clamping assembly 3 is used to clamp the wires connected to the first access terminal 5 and the second access terminal 6. By setting the clamping assembly 3, the wires connected to the first access terminal 5 and the second access terminal 6 are clamped. The clamping assembly 3 includes a positioning rod 33 fixedly connected to the front side of the through-type low-voltage current transformer body 1. A pressure rod 31 is slidably connected to the arc surface of the positioning rod 33. A semi-circular groove 34 is opened on the back of the pressure rod 31. The pressure rod 31 on the positioning rod 33 moves, so that the semi-circular groove 34 presses against the wire, thereby clamping the wires connected to the first access terminal 5 and the second access terminal 6. A screw 32 is rotatably connected to the front side of the through-type low-voltage current transformer body 1. The screw 32 and the pressure rod 31 are threadedly connected. Tightening the screw 32 causes the pressure rod 31 on the positioning rod 33 to move with the help of the positioning rod 33.

[0028] Working principle:

[0029] When using a through-type low-voltage current transformer (model LXBK1-Φ120 is optional), connect the meter to the first access terminal 5 (S1) and the second access terminal 6 (S1) respectively via wires. When the primary conductor current passes from P1 through P2 of the through-type low-voltage current transformer body 1, an alternating magnetic flux is generated in the iron core. The secondary current flows out from the first access terminal 5 and flows into the second access terminal 6. According to Faraday's law of electromagnetic induction, the current is measured by the connected meter. When installing the through-type low-voltage current transformer into the distribution cabinet, drag the through-type low-voltage current transformer so that the limiting ring 21 is inserted into the mounting hole on the distribution cabinet, thereby pre-fixing the through-type low-voltage current transformer to the distribution cabinet. Then, use screws to fix it, thereby achieving the effect of pre-fixing the through-type low-voltage current transformer as much as possible. Dragging the through-type low-voltage current transformer... The current transformer is pushed back into the limiting ring 21 after the locking block 22 contacts the distribution cabinet via the inclined surface 24, which compresses the spring 25. After the limiting ring 21 is fully inserted into the mounting hole on the distribution cabinet, the spring 25 returns to its original position, allowing the pin to be inserted into the distribution cabinet, thereby further fixing the through-type low-voltage current transformer. Pulling the pull rope 26 causes the locking block 22 to be fully retracted into the limiting ring 21, thereby disassembling the through-type low-voltage current transformer. Tightening the screw 32 (for loose screw 32, this application can also use glue to glue the threads, and when it needs to be removed, melt the glue at high temperature and then tighten it) causes the pressure rod 31 on the positioning rod 33 to move with the help of the positioning rod 33. The movement of the pressure rod 31 on the positioning rod 33 causes the semi-circular groove 34 to press against the wire, thereby clamping the wires connected to the first access terminal 5 and the second access terminal 6.

[0030] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any other way. Any person skilled in the art may use the disclosed technical content to make changes or modifications to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model, without departing from the scope of the utility model's technical solution, still fall within the protection scope of this utility model's technical solution. In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood through specific circumstances.

Claims

1. A through-type low-voltage current transformer, comprising a through-type low-voltage current transformer body (1), characterized in that: The front of the through-type low-voltage current transformer body (1) is provided with a first access terminal (5) and a second access terminal (6). The two sides of the through-type low-voltage current transformer body (1) are fixedly connected with mounting plates (4). The lower end of the mounting plate (4) is provided with a pre-fixing component (2). The pre-fixing component (2) includes a limiting ring (21) fixedly connected to the lower end of the mounting plate (4). The limiting ring (21) is inserted into the distribution cabinet. The arc surface of the limiting ring (21) is provided with a protrusion.

2. A through-type low-voltage current transformer according to claim 1, characterized in that: The arc surface of the limiting ring (21) is provided with a sliding groove (23), and a locking block (22) is slidably connected to the inner wall of the sliding groove (23). The locking block (22) is inserted into the power distribution cabinet, and a slope (24) is provided on one side of the locking block (22).

3. A through-type low-voltage current transformer according to claim 2, characterized in that: A spring (25) is fixedly connected to the left end of the card block (22), and the other end of the spring (25) is fixed to the limiting ring (21).

4. A through-type low-voltage current transformer according to claim 3, characterized in that: The left end of the locking block (22) is fixedly connected to a pull rope (26), which passes through the limiting ring (21) and the mounting plate (4).

5. A through-type low-voltage current transformer according to claim 4, characterized in that: The front of the through-type low-voltage current transformer body (1) is provided with a clamping assembly (3), which is used to clamp the wires connected to the first access terminal (5) and the second access terminal (6).

6. A through-type low-voltage current transformer according to claim 5, characterized in that: The clamping assembly (3) includes a positioning rod (33) fixedly connected to the front of the through-type low-voltage current transformer body (1). The positioning rod (33) has a pressure rod (31) slidably connected to its arc surface. A semi-circular groove (34) is provided on the back of the pressure rod (31).

7. A through-type low-voltage current transformer according to claim 6, characterized in that: The front of the through-type low-voltage current transformer body (1) is rotatably connected to a screw (32), and the screw (32) and the pressure rod (31) are threaded together.

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