Detachable current transformer primary terminal structure
The detachable primary terminal structure of the current transformer solves the problems of recycling difficulties and model increases caused by welding, and achieves a tight connection and flexible adaptation between the terminal and the conductor, thereby improving production efficiency and product maintainability.
Patent Information
- Application Number
- CN202423212734.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-25
- Publication Date
- 2026-01-02
- Estimated Expiration
- 2034-12-25
AI Technical Summary
The primary terminals of existing 10kV current transformers are welded to the primary conductor, making recycling difficult. Furthermore, different application scenarios have different requirements for terminal thickness, leading to an increase in transformer models and affecting production and inspection.
The current transformer adopts a detachable primary terminal structure, including a terminal body and a connecting block. The terminal is fixed to the conductor by threaded connection and welding, which can accommodate terminals of different thicknesses and specifications, and can be detached and replaced.
It achieves a tight bond between terminals and conductors, adapts to various thickness requirements, simplifies production, avoids product scrap, and improves production efficiency and flexibility.
Smart Images
Figure CN223757365U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a current transformer technology, specifically a detachable current transformer primary terminal structure. BACKGROUND
[0002] At present, the primary terminal of 10kV current transformer is welded on the primary conductor, so when the transformer body has a problem, it will cause the recycling difficulty of the primary terminal. When the primary terminal is unqualified, it will cause the scrap of the whole transformer. And different application scenarios have different thickness requirements for the primary terminal, which causes the increase of the model of the transformer, which is not conducive to product production and inspection. SUMMARY
[0003] The utility model provides a simple structure, can give consideration to close connection, strength demand, can simultaneously adapt to multi -specification terminal detachable replacement's detachable current transformer primary terminal structure.
[0004] The utility model discloses a detachable current transformer primary terminal structure, characterized by including terminal body and connecting block, two connecting blocks are fixedly connected on the two legs of primary conductor respectively, the threaded hole is set in the center of connecting block, the threaded rod is connected to the lower end of terminal body, the threaded length of threaded rod is less than the threaded depth of threaded hole, the threaded rod is screwed in the threaded hole, and the lower end of terminal body is crimped on the connecting block.
[0005] The thickness of the connecting block is 15mm, and the threaded depth is less than 15mm.
[0006] The connecting block is welded on the leg of the primary conductor.
[0007] The connecting block is locked and connected on the leg of the primary conductor through a bolt.
[0008] The connecting block is a circular structure, and the lower part of the terminal body is a cylindrical structure and the upper part is a square structure.
[0009] The terminal body is provided with a locking counterbore, and the locking counterbore is connected with the threaded hole through a countersunk screw.
[0010] The utility model fixes and sets up the connecting block on the two legs of primary conductor, and the commonly used standard primary terminal has different thickness specifications, and the thickness is usually 15mm-30mm. The thickness specification in this range can make the primary terminal and the primary conductor tightly combined, meet the strength requirement of the product, therefore, the connecting block is preferably set to 15mm, which can ensure that the threaded rod of the terminal body of the primary terminal is completely tightened and has sufficient strength. And the terminal body is crimped and fixed on the connecting block, which meets the thickness requirement of the primary terminal in most use scenarios of the primary conductor, and makes the product pass the factory test including "short hot current".
[0011] The utility model discloses a mutual inductor structure, which does not need to weld the primary terminal of different specifications on the primary conductor in advance in the production process, is favorable for batch production of products, and the product will not be scrapped due to unqualified primary terminals, and only needs to replace qualified primary terminals. BRIEF DESCRIPTION OF DRAWINGS
[0012] Fig. 1 It is a structural schematic diagram of the utility model;
[0013] Fig. 2 It is a structural schematic diagram of the primary conductor of the utility model;
[0014] Fig. 3 It is a structural schematic diagram of the terminal body of the primary terminal of the utility model.
[0015] In the drawing: primary conductor 1, supporting leg 2, connecting block 3, threaded hole 4, terminal body 5, threaded rod 6. DETAILED DESCRIPTION
[0016] The following further description is made in combination with the drawings.
[0017] Figs. 1-3 As shown in the figure, a detachable primary terminal structure of a current transformer includes a terminal body 5 and a connecting block 3, the two connecting blocks 3 are fixedly connected to the two supporting legs 2 of a primary conductor 1 respectively, the connecting block 3 is provided with a threaded hole 4 at the center, the terminal body 5 is provided with a threaded rod 6 at the lower end, the threaded length of the threaded rod is less than the threaded depth of the threaded hole, the threaded rod 6 is correspondingly screwed into the threaded hole 4, and the lower end of the terminal body 5 is crimped on the connecting block 3.
[0018] In the embodiment, the connecting block is welded on the supporting leg of the primary conductor.
[0019] In the embodiment, the connecting block and the terminal body are in square correspondence. On this basis, in order to ensure the correspondence, the connecting block can also be provided in a circular structure that is in full contact with the supporting leg, and the lower end of the terminal body is provided in a corresponding circular structure, so that the terminal body can be completely and positively connected to the connecting block and the conductivity of the connection can be ensured.
[0020] On the basis of the embodiment, according to the standard requirements of the current transformer, the thickness of the connecting block can be 15 mm, and the threaded depth of the threaded hole is less than 15 mm.
[0021] On the basis of the embodiment, the threaded rod can be connected to the lower end face of the terminal body by welding, or can be screwed into the hole at the lower end of the terminal body, or a locking counterbore can be formed at the upper end face of the terminal body, and the locking counterbore and the threaded hole are connected by a countersunk screw. Such connection processing technology belongs to the prior art, and will not be described in detail in the present application.
Claims
1. A detachable primary terminal structure of a current transformer, characterized by: The terminal body and the connecting block are included, two connecting blocks are fixedly connected on two legs of the primary conductor respectively, a threaded hole is arranged in the center of the connecting block, a threaded rod is connected to the lower end of the terminal body, the threaded length of the threaded rod is less than the threaded depth of the threaded hole, the threaded rod is screwed in the threaded hole, and the lower end of the terminal body is crimped on the connecting block.
2. A removable primary terminal structure for a current transformer according to claim 1, characterized in that: The thickness of the connecting block is 15 mm, and the threaded depth of the threaded hole is less than 15 mm.
3. A removable primary terminal structure for a current transformer according to claim 1, characterized in that: The connecting block is welded on the leg of the primary conductor.
4. A removable primary terminal structure for a current transformer according to claim 1, characterized in that: The connecting block is locked and connected on the leg of the primary conductor through a bolt.
5. A removable primary terminal structure for a current transformer according to claim 1, characterized in that: The connecting block is a circular structure, the lower part of the terminal body is a cylindrical structure, and the upper part is a square structure.
6. A removable primary terminal structure for a current transformer according to claim 1, characterized in that: A locking counterbore is arranged on the terminal body, and the locking counterbore is penetrated by a countersunk screw to lock the counterbore and the threaded hole.