Three-phase low-voltage combined current transformer

Abstract

The utility model discloses a three-phase low-voltage combined current transformer which comprises a transformer body, a transverse positioning lug is arranged on the long side of the transformer body, a vertical positioning lug is arranged on the short side of the transformer body, a rotating disc is rotationally installed at the bottom of the transformer body, a loading plate is detachably connected to the lower portion of the rotating disc, and a positioning hole is formed in the surface of the loading plate. A connecting beam with a hole is also arranged on the loading plate; when the mutual inductors are transversely arranged, the vertical positioning lugs are matched with the positioning holes; when the mutual inductors are vertically arranged, the transverse positioning lugs are matched with the holes in the connecting beams, the mutual inductors can freely rotate under the action of the rotating disc, when the mutual inductors installed in a unified mode are used, the installation position of the loading plate does not need to be adjusted in the installation process, the installation flexibility and convenience are improved, and the installation cost is reduced. And particularly, in a scene needing to face line access in different directions, the installation time and the adjustment cost can be obviously reduced. And the dependence on specific installation conditions is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of current transformers, and in particular relates to a three-phase low-voltage combined current transformer. Background Art

[0002] A current transformer is an instrument that converts a large primary current into a smaller secondary current for measurement based on the principle of electromagnetic induction. Its primary function is to provide a small current signal proportional to the primary current for measuring instruments, relay protection devices, and other devices, enabling monitoring, control, and protection of power systems. The operating principle of a current transformer is based on the law of electromagnetic induction. When the primary current passes through the primary winding of a current transformer, an alternating magnetic field is generated in the iron core. This alternating magnetic field induces an electromotive force in the secondary winding, generating a secondary current. Because the secondary winding has many more turns than the primary winding, according to the principle of transformers, the secondary current is proportional to the primary current and its value is much smaller than the primary current.

[0003] Currently, when unifying current transformers, due to the access of lines in different directions, it is necessary to locate the installation position of the current transformer before installation. This will increase the installation time and adjustment cost when installing multiple current transformers. Utility Model Content

[0004] The purpose of the utility model is to provide a three-phase low-voltage combined current transformer to solve the installation and adjustment problems in the prior art.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A three-phase low-voltage combined current transformer includes a transformer, wherein the long sides of the transformer are provided with horizontal positioning ears, the short sides of the transformer are provided with vertical positioning ears, a turntable is rotatably mounted on the bottom of the transformer, and a loading plate is detachably connected below the turntable, the loading plate has positioning holes on its surface, and the loading plate is also provided with a connecting beam with holes; when the transformers are arranged horizontally, the vertical positioning ears cooperate with the positioning holes; when the transformers are arranged vertically, the horizontal positioning ears cooperate with the holes on the connecting beam;

[0007] Furthermore, a connecting arm is provided at the tail end of the loading plate, a crossbeam is provided on one side of the connecting arm, rectangular blocks are symmetrically provided on the surface of the turntable, rectangular grooves are provided on the surfaces of the rectangular blocks and the crossbeam, and a positioning arm is installed inside the rectangular groove.

[0008] Furthermore, the connecting arm and the crossbeam form an I-shaped structure.

[0009] Furthermore, the loading plate has a notch at the rear end, and notches are formed on both sides of the positioning arm. U-shaped reinforcement plates are installed within the notches and the notches. After inserting the positioning arm, the notches at both ends of the positioning arm are aligned with the notch. The U-shaped reinforcement plates are then inserted and snapped onto the notches and the notches, providing additional support and fixation for the positioning arm, preventing it from falling out of the rectangular slot and further ensuring a stable installation of the loading plate.

[0010] Furthermore, a stopper plate is provided at the rear end of the reinforcement plate. After the reinforcement plate is installed, one end of the stopper plate is restrained against one end of the loading plate, thereby stabilizing the reinforcement plate and preventing it from slipping through the cutouts and notches. This not only prevents the risk of the reinforcement plate slipping due to vibration or external forces, but also enhances the overall stability of the connection between the loading plate and the turntable.

[0011] Furthermore, threaded holes are provided on one side of the positioning arm and the reinforcement plate. After the reinforcement plate is installed, bolts are connected inside the threaded holes to complete the installation of the mutual inductor and the loading plate.

[0012] The technical solution of this utility model has the following beneficial effects:

[0013] 1. The transformer can be freely rotated under the action of the turntable. When using uniformly installed transformers, there is no need to adjust the installation position of the loading plate during installation, which improves the flexibility and convenience of installation. Especially in scenarios where lines need to be connected in different directions, it can significantly reduce installation time and adjustment costs. It also reduces dependence on specific installation conditions.

[0014] 2. The loading board and the mutual inductor are installed by insertion and fitting, and can be disassembled and reassembled when necessary, which improves the flexibility and maintainability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following briefly introduces the drawings required for describing the embodiments.

[0016] Figure 1 This is a schematic diagram of the horizontal arrangement structure of the mutual inductor of the present utility model.

[0017] Figure 2 This is a schematic diagram of the longitudinal arrangement structure of the mutual inductor of the present utility model.

[0018] Figure 3 It is a schematic diagram of the overall cross-sectional structure of the present utility model.

[0019] Figure 4 This is a schematic diagram of the split structure of the utility model.

[0020] Figure 5 This is a schematic diagram of the assembly structure of the utility model.

[0021] Figure numerals: 10, mutual inductor; 11, horizontal positioning ear; 12, vertical positioning ear; 13, turntable; 14, rectangular block; 15, rectangular groove; 20, loading plate; 21, positioning hole; 22, connecting beam; 23, connecting arm; 24, crossbeam; 25, incision; 26, positioning arm; 27, notch; 28, threaded hole; 30, reinforcement plate; 31, limit plate. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely for the purpose of explaining the present invention and are not intended to limit the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0023] Example 1:

[0024] refer to Figure 1-Figure 3 A three-phase low-voltage combined current transformer includes a transformer 10. The long sides of the transformer 10 are provided with horizontal positioning ears 11, and the short sides of the transformer 10 are provided with vertical positioning ears 12. A turntable 13 is rotatably mounted on the bottom of the transformer 10. A loading plate 20 is detachably connected below the turntable 13. The loading plate 20 has positioning holes 21 on its surface and a connecting beam 22 with a hole is also provided on the loading plate 20.

[0025] In the above solution, the loading plate 20 is positioned and installed, and is fixed to the wall or the ground by bolts passing through the positioning holes 21. The mutual inductor 10 can be freely rotated under the action of the turntable 13. When the mutual inductor 10 is installed uniformly, there is no need to adjust the installation position of the loading plate 20 during installation. This improves the flexibility and convenience of installation, especially in scenarios where lines need to be connected in different directions, which can significantly reduce installation time and adjustment costs. It also reduces dependence on specific installation conditions.

[0026] Further references Figure 1 When the transformers 10 are arranged horizontally, the vertical positioning ears 12 match the positioning holes 21. The positioning holes 21 are used to pass bolts through to install the loading plate 20. That is, the bolts pass through the vertical positioning ears 12 and the positioning holes 21 simultaneously. This stabilizes the loading plate 20 while also fixing the transformer 10 in one direction.

[0027] Further references Figure 2When the mutual inductor 10 is arranged vertically, the transverse positioning ears 11 match the holes on the connecting beam 22. When the mutual inductor 10 is arranged vertically, the transverse positioning ears 11 match the holes on the connecting beam 22 concentrically and are positioned by bolts, thereby fixing the position of the mutual inductor 10 in one direction.

[0028] Example 2:

[0029] refer to Figure 3-Figure 5 A connecting arm 23 is provided at the tail end of the loading plate 20, and a crossbeam 24 is provided on one side of the connecting arm 23. Rectangular blocks 14 are symmetrically provided on the surface of the turntable 13. Rectangular grooves 15 are provided on the surfaces of the rectangular blocks 14 and the crossbeam 24, and a positioning arm 26 is installed inside the rectangular groove 15.

[0030] In the above scheme, the connecting arm 23 and the crossbeam 24 form an "I"-shaped structure, and the rectangular block 14 is inserted and installed between the two rectangular blocks 14, with the inner wall of the connecting arm 23 fitting against the outer wall of the rectangular block 14. At this time, the rectangular grooves 15 opened by the rectangular block 14 and the crossbeam 24 are aligned with each other, and the positioning arm 26 is inserted into the rectangular groove 15. The positioning arm 26 has a rectangular structure and fits in with the rectangular groove 15, thereby connecting the loading plate 20 and the turntable 13 to each other; the installation is carried out in an insertion and interlocking manner, and can be disassembled and reassembled when needed, thereby improving the flexibility and maintainability of the equipment.

[0031] Further references Figure 4 and Figure 5 A notch 25 is provided at the tail end of the loading plate 20 , and notches 27 are provided on both sides of the positioning arm 26 . A reinforcing plate 30 with a U-shaped structure is installed inside the notch 25 and the notch 27 .

[0032] In the above scheme, after inserting the positioning arm 26, the notches 27 at both ends of the positioning arm 26 are parallel to the incision 25, and then the U-shaped reinforcement plate 30 is inserted and snapped onto the notch 27 and the incision 25, providing additional support and fixation for the positioning arm 26, preventing the positioning arm 26 from falling off in the rectangular groove 15, and further improving the stable installation of the loading plate 20.

[0033] Further references Figure 4 and Figure 5 A stop plate 31 is provided at the rear end of the reinforcement plate 30. After the reinforcement plate 30 is installed, one end of the stop plate 31 is restrained at one end of the loading plate 20. This stabilizes the reinforcement plate 30 and prevents it from sliding through the notch 25 and the gap 27. This not only prevents the reinforcement plate 30 from sliding due to vibration or external force, but also enhances the overall stability of the connection between the loading plate 20 and the turntable 13.

[0034] Further references Figure 4, one side of the positioning arm 26 and the reinforcing plate 30 are both provided with a threaded hole 28. After completing the installation of the reinforcing plate 30, bolts are connected inside the threaded hole 28 to complete the installation of the mutual inductor 10 and the loading plate 20.

[0035] The specific implementation process of this embodiment is as follows:

[0036] The loading plate 20 is installed and angled with the transformer 10: Bolts are inserted through the positioning holes 21 into the wall or floor to secure the loading plate 20. For transformers 10 arranged horizontally, the vertical positioning ears 12 are aligned with the positioning holes 21, and bolts are inserted through the vertical positioning ears 12 and positioning holes 21 simultaneously to stabilize the loading plate 20. For transformers 10 arranged vertically, the horizontal positioning ears 11 are aligned concentrically with the holes on the connecting beam 22 and are then secured with bolts to stabilize the transformer 10.

[0037] Installation of the loading plate 20 and the mutual inductor 10: The rectangular block 14 is inserted and installed between the two rectangular blocks 14, and the inner wall of its connecting arm 23 is fitted against the outer wall of the rectangular block 14. At this time, the rectangular grooves 15 opened by the rectangular block 14 and the crossbeam 24 are aligned with each other, and the positioning arm 26 is inserted into the rectangular groove 15. The positioning arm 26 has a rectangular structure and matches the rectangular groove 15. The notches 27 at both ends of the positioning arm 26 are parallel to the incision 25, and then the U-shaped reinforcement plate 30 is inserted and buckled into the notch 27 and the incision 25. One end of the limit plate 31 is restricted to one end of the loading plate 20. Finally, bolts are connected inside the threaded hole 28 to complete the installation of the mutual inductor 10 and the loading plate 20.

[0038] The above embodiments are merely exemplary embodiments of the present invention and are not intended to limit the scope of the present invention. The scope of protection of the present invention is defined by the claims. Various modifications or equivalent substitutions may be made to the present invention within the spirit and scope of protection of the present invention. Such modifications or equivalent substitutions should also be considered to fall within the scope of protection of the present invention.

[0039] In the description of this utility model, it should be noted that the terms "inner," "front," "back," "left," and "right" and the like, indicating directions or positional relationships, are based on the directions or positional relationships shown in the enclosed circles, or are the directions or positional relationships in which the utility model product is typically placed when in use. They are used solely to facilitate the description of this utility model and simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific direction, be constructed, or operate in a specific direction. Therefore, these terms indicating directions or positional relationships should not be construed as limiting this utility model.

[0040] It should be further noted that, unless otherwise expressly specified or limited, the terms "disposed" and "connected" should be understood broadly. For example, these terms may refer to fixed, removable, or integral connections between components; they may also refer to mechanical or electrical connections; and they may also refer to direct connections or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of these terms in this invention based on the specific circumstances.

Claims

1. A three-phase low-voltage combined current transformer, characterized in that: The invention comprises a mutual inductor (10), wherein a transverse positioning ear (11) is provided on a long side of the mutual inductor (10), a vertical positioning ear (12) is provided on a short side of the mutual inductor (10), a turntable (13) is rotatably mounted on the bottom of the mutual inductor (10), a loading plate (20) is detachably connected below the turntable (13), a positioning hole (21) is provided on the surface of the loading plate (20), and a connecting beam (22) with a hole is also provided on the loading plate (20); When the mutual inductor (10) is arranged horizontally, the vertical positioning ear (12) matches the positioning hole (21); When the mutual inductors (10) are arranged vertically, the transverse positioning ears (11) match with the holes on the connecting beam (22).

2. A three-phase low-voltage combined current transformer according to claim 1, characterized in that: The tail end of the loading plate (20) is provided with a connecting arm (23), and a crossbeam (24) is provided on one side of the connecting arm (23). Rectangular blocks (14) are symmetrically provided on the surface of the turntable (13). Rectangular grooves (15) are provided on the surfaces of the rectangular blocks (14) and the crossbeam (24), and a positioning arm (26) is installed inside the rectangular groove (15).

3. A three-phase low-voltage combined current transformer according to claim 2, characterized in that: The connecting arm (23) and the crossbeam (24) form an "I"-shaped structure.

4. A three-phase low-voltage combined current transformer according to claim 3, characterized in that: A cutout (25) is provided at the rear end of the loading plate (20), and notches (27) are provided on both sides of the positioning arm (26). A reinforcing plate (30) with a U-shaped structure is installed inside the cutout (25) and the notch (27).

5. A three-phase low-voltage combined current transformer according to claim 4, characterized in that: A limiting plate (31) is provided at the rear end of the reinforcement plate (30).

6. A three-phase low-voltage combined current transformer according to claim 5, characterized in that: A threaded hole (28) is provided on one side of the positioning arm (26) and the reinforcing plate (30).

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