Structure-modularized open-close type current transformer

Abstract

The utility model discloses an open-close type current transformer with a modularized structure, which comprises an iron core coil winding and a plastic shell, the iron core comprises a fixed upper yoke, a fixed lower yoke and a core column module, the fixed upper yoke and the fixed lower yoke are U-shaped with two opposite openings, the coil winding is arranged in a coil module, the coil module is cylindrical, and the plastic shell is arranged in the coil winding. One end of the coil module is provided with an interface, and the other end of the coil module is provided with a contact suitable for the interface; the outer side of the coil module is further provided with a protruding part, the protruding part is provided with a screw hole and an opening suitable for buckling the fixing block, through the modular design, the current transformer with the modular structure can adapt to busbars of different specifications and is easy to maintain, and the universality and adaptability of the current transformer are improved.

Description

Technical Field

[0001] The utility model relates to a current transformer, in particular to a modularized split-type current transformer. Background Art

[0002] In the prior art, busbars in power distribution cabinets have various specifications, a wide current range, and different standards, which requires multiple specifications of split current transformers. In order to improve versatility and adaptability, the utility model discloses a modular split current transformer, which enables the split current transformer to quickly adapt to different busbar specifications and current requirements.

[0003] The Chinese utility model patent with publication number CN220357909U discloses a modular current transformer, which can effectively improve the problem of inconvenient operation of the current transformer during installation and welding, and improve the installation efficiency. However, this technical solution still cannot get rid of the welding operation. Utility Model Content

[0004] The purpose of the present invention is to overcome the defects in the prior art and provide a current transformer with simple structure, strong versatility, convenient installation, safety and reliability. The current transformer can adapt to busbars of different specifications through modular design and adopts standardized module splicing to simplify the design and manufacturing process.

[0005] To achieve the above purpose, the technical solution of the utility model is implemented through the following technical solution.

[0006] A modular split current transformer, comprising an iron core, a coil winding and a plastic shell, wherein the iron core comprises a fixed upper yoke, a fixed lower yoke and a core column module, wherein the fixed upper yoke and the fixed lower yoke are two U-shaped openings facing each other, wherein the coil winding is installed in the coil module, wherein the coil module is cylindrical, wherein the cross section of the cylinder is suitable for accommodating the core column module, wherein an interface is provided at one end of the coil module, and a contact point suitable for the interface is provided at the other end;

[0007] In order to achieve that the current transformer coil winding can adapt to busbars of different specifications, the preferred technical solution of the utility model is to splice multiple coil modules;

[0008] Furthermore, a protrusion is provided on the outer side of the coil module, and the protrusion is provided with a screw hole and an opening suitable for a buckle fixing block. The coil module can be stacked by a slider, and an adjusting screw and a buckle fixing block are provided to increase the length window of the current transformer;

[0009] Furthermore, a variety of coil modules with different numbers of windings are manufactured for replacement;

[0010] In order to achieve that the length of the current transformer core can adapt to busbars of different specifications, the preferred technical solution of the utility model is to connect the core column module with the fixed upper yoke and the fixed lower yoke of the core through mortise and tenon or slot structures.

[0011] Furthermore, a plurality of stem modules of different lengths are manufactured for replacement;

[0012] In order to achieve insulation and aesthetics of the current transformer, the preferred technical solution of the utility model is to provide a plastic shell;

[0013] In order to realize easy maintenance of the current transformer and convenient replacement of the coil module, the preferred technical solution of the utility model is to add a fixing piece, one end of which is provided with an interface for matching the coil module connector, and the other end is connected to the plastic shell containing the fixed lower yoke by screws;

[0014] The advantages and beneficial effects of the utility model are as follows: through modular design, standardized modules are designed for the iron core and the coil, which can adapt to different busbars in the distribution cabinet; the standardized modules can be added, replaced, and deleted, which is beneficial to the maintenance of the current transformer; and the versatility and adaptability of the current transformer are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a standard coil module provided by the utility model;

[0016] Figure 2 This is a conceptual diagram of a structural modular open-close current transformer provided by the utility model;

[0017] In the figure: 1-fixed upper yoke; 2-fixed lower yoke; 3-core column module; 4-coil module; 5-interface; 6-contact point; 7-mortise and tenon structure; 8-slot structure; 9-housing; 10-protrusion; 11-screw hole; 12-opening; 13-fixing part. DETAILED DESCRIPTION

[0018] The following is a further description of the specific implementation of the present invention in conjunction with the accompanying drawings and embodiments. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0019] A modular open-close current transformer comprises an iron core, a coil winding and a plastic shell 9, wherein the iron core comprises a fixed upper yoke 1, a fixed lower yoke 2 and a core column module 3, wherein the fixed upper yoke 1 and the fixed lower yoke 2 are two U-shaped openings facing each other, wherein the coil winding is installed in a coil module 4, wherein the coil module 4 is cylindrical, and the cross section of the cylinder is suitable for accommodating the core column module 3, wherein an interface 5 is provided at one end of the coil module 4, and a contact 6 suitable for the interface 5 is provided at the other end, wherein a protrusion 10 is further provided on the outer side of the coil module 4, wherein the protrusion is provided with a screw hole 11 and an opening 12 suitable for a snap-on fixing block, wherein the core column module 3 is connected to the fixed upper yoke 1 and the fixed lower yoke 2 of the iron core by a mortise and tenon structure, and further comprises a fixing member 13, wherein one end of the fixing member 13 can be assembled with the coil module 4, wherein the fixing member 13 and the core column module 3 are connected by a mortise and tenon structure 7, and the contact between the core column module 3 and the fixed lower yoke 2 is not affected, and wherein the other end of the fixing member 13 is connected to the plastic shell 9 at the fixed lower yoke 2 by a screw.

[0020] In the implementation of the utility model, when replacing the current transformer, the fixing part 13 together with the fixed lower yoke 2 and the plastic shell 9 at the fixed lower yoke 2 are removed, and the coil module 4 is directly added or deleted, or the combination of the coil module 4 is changed, and the coil modules 4 are connected through the interfaces 5 and contacts 6 between each other, or fixed through the screw holes 11 and the openings 12 on the raised parts 10, with screws or snap-on fixing blocks, in conjunction with the busbar of the distribution cabinet, and then the fixing part 13 together with the fixed lower yoke 2 and the plastic shell 9 at the fixed lower yoke 2 are reinstalled on the current transformer.

[0021] In the implementation of the utility model, when the current transformer is replaced, when the core column length is insufficient, the fixing part 13 together with the fixed lower yoke 2 and the plastic shell 9 at the fixed lower yoke 2 are removed, the plastic shell 9 at the fixed upper yoke 1 is disassembled, the coil modules 4 are completely removed, and the core column module 3 is removed from the slot structure 8. After replacing the core column module 3 with a sufficient length, a suitable number of coil modules 4 are installed outside the core column module 3, and the coil modules 4 are connected through the interfaces 5 and contacts 6 between each other, or they can be fixed through the screw holes 11 and the openings 12 on the raised portion 10, by screws or snap-on fixing blocks, and matched with the busbar of the distribution cabinet, and then the fixing part 13 together with the fixed lower yoke 2 and the plastic shell 9 at the fixed lower yoke 2 are reinstalled on the current transformer.

[0022] In order to better implement the present invention, it is also necessary to understand the following:

[0023] The design of the standardized module determines the standard length of the coil module 4. For stability, the size of multiple coil modules 4 can also be designed, and the width and cross-sectional height are determined according to the busbar spacing. The adjustment mechanism of the coil module is to increase the length window of the current transformer by stacking the slider, adjusting the screw or snap-on fixing block to adapt to busbars of different lengths.

[0024] The core and winding coil group design adjusts the cross-sectional ratio of the core and winding coil group according to the current size to ensure accuracy within different current ranges. The cross-sectional area of ​​a standardized core column module 3 is determined by the busbar spacing, and the winding load capacity of the core column module 3 is usually determined.

[0025] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the protection scope of the present utility model.

Claims

1. A modular split-type current transformer, comprising an iron core, a coil winding and a plastic housing, wherein the iron core comprises a fixed upper yoke, a fixed lower yoke and a core column module, wherein the fixed upper yoke and the fixed lower yoke are two U-shaped openings facing each other, characterized in that: The coil winding is installed in the coil module, and the coil module is cylindrical, and the cross section of the cylinder is suitable for accommodating the core column module.

2. The structural modular split-type current transformer according to claim 1, characterized in that: An interface is arranged at one end of the coil module, and a contact point suitable for the interface is arranged at the other end.

3. The structural modular split-type current transformer according to claim 1 or 2, characterized in that: A protrusion is also provided on the outer side of the coil module, and the protrusion is provided with a screw hole and an opening suitable for a snap-fit ​​fixing block.

4. The structural modular split-type current transformer according to claim 1, characterized in that: The core column module and the fixed upper yoke of the iron core are connected through a mortise and tenon or a slot structure, and the core column module and the fixed lower yoke of the iron core are connected through a mortise and tenon structure.

5. The structural modular split-type current transformer according to claim 1, characterized in that: A fixing piece is also provided, one end of which is provided with an interface for matching the coil module connector, and the other end of which is connected to a plastic shell containing a fixed lower yoke through screws.

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