A current transformer

Abstract

The utility model discloses a current transformer, including shell and induction winding, the shell includes upper portion and lower part, is equipped with elastic plug -in buckle structure between upper portion and lower part, still set up auxiliary plug -in board cooperation and installation, secondary wiring port includes buckle, lock hole board and wiring pressure spare, and wire clamp subassembly includes abutting seat and abutting bolt, and the front end threaded connection of abutting bolt has the abutting cap clamping measurement bus setting, the utility model discloses a current transformer when using, can through the quick buckling of upper portion and lower part, cooperation auxiliary plug -in board quick complete open -close assembly use, form annular and complete installation in the half C type shell buckling cable both sides, set up the secondary wiring port on the shell and facilitate wiring, and set up buckle cover can avoid electricity larceny etc. Hidden danger, set up wire clamp subassembly can fix stable to cable and shell, guarantee cable even when non - horizontal installation on the ground, also can not slide on cable.

Description

Technical Field

[0001] This utility model relates to the field of current transformer technology, and specifically to a current transformer. Background Technology

[0002] In low-voltage distribution areas of power systems, cable-through current transformers are commonly used for energy metering and current measurement. This means that the primary incoming and outgoing lines use insulated cables, and the matching current transformer is a busbar-type device mounted outside the primary insulated cable for current measurement. Because the product structure is busbar-type and cannot be opened or closed, the primary cable must be removed before installation, maintenance, and replacement, significantly increasing workload. Furthermore, the secondary wiring terminals are in the form of junction boxes, requiring a separate cable for electrical connection between the secondary and the energy meter. On-site installation and disassembly are difficult and cumbersome, and potential hazards exist at the secondary wiring cable points. Based on requirements for product integration and anti-theft measures, the product structure needs further improvement. Utility Model Content

[0003] In view of the existing technology, the purpose of this utility model is to provide a current transformer to solve the problems of inconvenient installation, maintenance and installation complexity of existing indoor bus-type current transformers in power systems.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a current transformer, including a housing and an induction winding disposed in the inner cavity of the housing. The housing includes an upper part and a lower part configured in a C-shape that can be joined to form an annular shape. An elastic buckle structure is provided between the upper part and the lower part for relative connection and fastening. The elastic buckle structure also includes an auxiliary plug plate. The housing is also provided with a secondary wiring port. The secondary wiring port includes a cover hinged to the housing and a wiring pressure member located below the cover. The cover is provided with a locking groove. The housing is provided with a lock hole plate opposite to the locking groove to isolate two sets of wiring pressure members on the same side.

[0005] As a further provision of the above solution, the upper and lower parts are also provided with a wire clamping assembly. The wire clamping assembly includes a clamping seat and a clamping bolt. The clamping seat is provided with a mounting groove, and a nut is provided in the mounting groove. The clamping bolt passes through the through hole on the clamping seat and is threadedly connected to the nut.

[0006] As a further feature of the above scheme, the front end of the clamping bolt is threaded with an abutment cap, and the clamping assemblies provided on the upper and lower parts are driven by the clamping bolt to loosen and tighten the measuring busbar.

[0007] As a further feature of the above solution, the auxiliary insert plate is provided with a buckle 1, a buckle 2 and a sliding plate. The upper part is provided with a buckle groove 3, a sliding groove opposite to the sliding plate and a buckle groove 1 opposite to the buckle 1. The lower part is provided with a matching hook opposite to the buckle 2 and a buckle 3 that matches the buckle groove 3.

[0008] As a further feature of the above scheme, the induction winding is embedded in the upper and lower parts, and its C-shaped ends that match the upper and lower parts are respectively provided with contact surfaces, which are exposed in the upper and lower parts.

[0009] As a further feature of the above solution, the cover includes a hinge shaft and a buckle, and the locking plate has a slot on one side opposite to the buckle.

[0010] Beneficial effects: When using the current transformer of this utility model, the upper and lower parts can be quickly fastened together with the auxiliary plug plate to complete the opening and closing assembly. The two C-shaped shell halves are fastened to both sides of the cable to form a ring for installation. The secondary wiring port on the shell facilitates wiring. The buckle cover can prevent theft of electricity and other hidden dangers. The wire clamping component can fix the cable and the shell to a stable position, ensuring that the cable will not slide on the cable even when it is not installed horizontally to the ground. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the current transformer structure of this utility model.

[0012] Figure 2 This is a schematic diagram of the current transformer assembly in this embodiment.

[0013] Figure 3 This is a schematic diagram of the upper internal structure of the current transformer in this embodiment.

[0014] Figure 4 This is a cross-sectional schematic diagram of the current transformer in this embodiment.

[0015] Reference numerals: 1. Housing; 11. Upper part; 111. Snap groove one; 113. Slide groove; 114. Snap groove three; 12. Lower part; 122. Matching hook; 124. Snap three; 13. Elastic snap structure; 14. Auxiliary insert plate; 141. Snap one; 142. Snap two; 143. Slide plate; 2. Induction winding; 21. Contact surface; 3. Secondary wiring port; 31. Snap cover; 32. Wiring pressure piece; 33. Lock groove; 34. Lock hole plate; 4. Wire clamping assembly; 41. Clamping seat; 42. Clamping bolt; 43. Resettling groove; 44. Nut; 45. Through hole; 46. Abutment cap. Detailed Implementation

[0016] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, where there is no conflict, the embodiments and features described in these embodiments can be combined with each other.

[0017] like Figure 1-4 The present invention provides a technical solution for a current transformer. The main structure of the transformer in this embodiment includes a housing 1, an induction winding 2 disposed within the cavity of the housing 1, and components such as a circuit board including a chip. The housing 1 in this embodiment includes an upper part 11 and a lower part 12 that are C-shaped and can be joined to form an annular structure. In use, the annular housing 1 is first disassembled into the upper part 11 and the lower part 12, and then fastened onto the busbar to be tested. Subsequently, the two parts are connected by an elastic snap-fit ​​structure 13 between the upper part 11 and the lower part 12. Once snapped together, the installation is complete, and the next step of current sensing can be performed. Furthermore, the elastic snap-fit ​​structure 13 of this embodiment also includes an auxiliary insert plate 14 that is detachably mounted on the upper part 11. The auxiliary insert plate 14 is provided with snap-fit ​​141, snap-fit ​​142 and sliding plate part 143. The upper part 11 is provided with snap-fit ​​groove 114, sliding groove 113 opposite to sliding plate part 143 and snap-fit ​​groove 111 opposite to snap-fit ​​141. The lower part 12 is provided with a mating hook 122 opposite to snap-fit ​​142 and snap-fit ​​124 that matches snap-fit ​​groove 114.

[0018] In use, the upper part 11 and the lower part 12 are first fastened together. At this time, the three-slot 114 and the three-slot buckle 124 will engage and connect first. However, the connection achieved by the two is not stable enough. If an external force is applied to the upper part 11 and the lower part 12 to separate them, they will immediately spring apart. Based on this, this embodiment also provides an auxiliary insert plate 14, which is inserted radially. During the process of the auxiliary insert plate 14 being inserted along the slide groove 113 through the sliding plate part 143, the two-slot buckle 142 of the auxiliary insert plate 14 and the engaging hook 122 form a limit. The existence of this limit makes it impossible for the lower part 12 and the upper part 11 to separate completely. At the same time as the two are engaged, the first-slot buckle 141 is inserted into the first-slot 111 of the upper part 11 to keep the auxiliary insert plate 14 stably installed. Through the third-party intervention and locking of the auxiliary insert plate 14, when the housing 1 is installed, the upper part 11 and the lower part 12 cannot be separated without first removing the auxiliary insert plate 14, thereby ensuring the stability of the current transformer during use.

[0019] Furthermore, in this embodiment, the transformer housing 1 is also provided with a secondary wiring port 3. The secondary wiring port 3 includes a cover 31 hinged to the housing 1 and a wiring clamp 32 located below the cover 31. The cover 31 is provided with a locking groove 33. The housing 1 is provided with a locking hole plate 34 opposite to the locking groove 33 to isolate two sets of wiring clamps 32 on the same side. The cover 31 includes a hinge shaft 311 and a buckle 312. The locking hole plate 34 is provided with a groove 313 opposite to the buckle 312 on one side.

[0020] As described above, in this embodiment, when the secondary wiring port 3 of the current transformer is in use, the cover 31 is first swung along the hinge axis 311 to open the operating space of the wiring clamp 32. After the secondary cable is clamped, the cover 31 is swung downward so that the buckle 312 is engaged in the slot 313. Then, at the locking groove 33 of the cover 31, the locking hole on the locking plate 34 is exposed in the locking groove 33. The operator can lock it by means of a rolling strip, etc., to restrict the opening of the cover 31. Furthermore, if there is a need to prevent electricity theft, it can be locked directly, so that outsiders cannot open the operating space of the wiring clamp 32 without forcibly damaging the cover 31.

[0021] As a further provision of the above scheme, the upper part 11 and the lower part 12 are also provided with a wire clamping assembly 4. The wire clamping assembly 4 includes a clamping seat 41 and a clamping bolt 42. The clamping seat 41 is provided with a mounting groove 43, and a nut 44 is provided in the mounting groove 43. The clamping bolt 42 passes through the through hole 45 on the clamping seat 41 and is threadedly connected to the nut 44. The front end of the clamping bolt 42 is threadedly connected to an abutment cap 46. The wire clamping assembly 4 provided on the upper part 11 and the lower part 12 is driven by the clamping bolt 42 to tighten and loosen the clamping of the measuring busbar.

[0022] As described above, the clamping assembly 4 in this embodiment is respectively provided at both ends of the annular transformer busbar groove formed by the upper part 11 and the lower part 12 of the housing 1. By providing multiple sets of opposing clamping assemblies 4 on the upper part 11 and the lower part 12, the busbar is clamped, thereby achieving stability and limiting of the transformer during installation and use on the busbar. This avoids problems such as slippage of the transformer during use when it is used in a non-horizontal installation location.

[0023] As a further provision of the above scheme, the induction winding 2 is embedded in the upper part 11 and the lower part 12, and the C-shaped ends that match the upper part 11 and the lower part 12 are respectively provided with contact surfaces 21. The contact surfaces 21 are exposed on the upper part 11 and the lower part 12. When the upper part 11 and the lower part 12 are fastened to form a ring, the contact surfaces 21 on both sides form electrical conduction.

[0024] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of this utility model and its equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A current transformer, comprising a housing (1) and an induction winding (2) disposed within the cavity of the housing (1), characterized in that: The housing (1) includes an upper part (11) and a lower part (12) configured in a C-shape and capable of being joined to form an annulus. An elastic buckle structure (13) is provided between the upper part (11) and the lower part (12) for relative connection and fastening. The elastic buckle structure (13) also includes an auxiliary plug plate (14). The housing (1) is also provided with a secondary wiring port (3). The secondary wiring port (3) includes a cover (31) hinged to the housing (1) and a wiring clamp (32) located below the cover (31). The cover (31) is provided with a locking groove (33). The housing (1) is provided with a locking hole plate (34) opposite to the locking groove (33) to isolate two sets of wiring clamps (32) on the same side.

2. A current transformer according to claim 1, characterized in that: The upper part (11) and the lower part (12) are also provided with a wire clamping assembly (4). The wire clamping assembly (4) includes a clamping seat (41) and a clamping bolt (42). The clamping seat (41) is provided with a mounting groove (43). A nut (44) is provided in the mounting groove (43). The clamping bolt (42) passes through the through hole (45) on the clamping seat (41) and is threadedly connected to the nut (44).

3. A current transformer according to claim 2, characterized in that: The front end of the clamping bolt (42) is threaded with a clamping cap (46), and the clamping assembly (4) provided on the upper part (11) and the lower part (12) is driven by the clamping bolt (42) to tighten and loosen the measuring busbar.

4. A current transformer according to claim 1, characterized in that: The auxiliary insert plate (14) is provided with a first buckle (141), a second buckle (142) and a sliding plate (143). The upper part (11) is provided with a third buckle groove (114), a sliding groove (113) opposite to the sliding plate (143) and a first buckle groove (111) opposite to the first buckle (141). The lower part (12) is provided with a matching hook (122) opposite to the second buckle (142) and a third buckle (124) matching the third buckle groove (114).

5. A current transformer according to claim 1, characterized in that: The induction winding (2) is embedded in the upper part (11) and the lower part (12), and the C-shaped ends that match the upper part (11) and the lower part (12) are respectively provided with contact surfaces (21), and the contact surfaces (21) are exposed in the upper part (11) and the lower part (12).

6. A current transformer according to claim 1, characterized in that: The cover (31) includes a hinge shaft (311) and a buckle (312), and the locking plate (34) has a slot (313) on one side that is opposite to the buckle (312).

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