Current transformer secondary circuit short-circuit wire combination wire end
By designing a short-circuit combination terminal for the secondary circuit of the current transformer, and using insulating materials and a limiting structure, the problems of short circuit and safety in the process of high-current transformer substation were solved, achieving stable connection and safe replacement, and improving power supply reliability and safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-25
- Publication Date
- 2026-03-10
AI Technical Summary
Current transformers can cause loads on lines during the conversion from high current to low current, leading to short circuits or open circuits, affecting power supply reliability and posing risks of personal injury. Existing power outage methods are unsafe.
A short-circuit connector for the secondary circuit of a current transformer is designed. It uses an insulated fixing tube and connecting ring, and achieves a stable connection between the branch line and the main line through threaded connection and limiting structure, avoiding short circuits caused by excessive load and providing a safe replacement method.
It achieves stable connection of branch lines during high-current substation processes, avoids line short circuits, improves power supply reliability, and ensures the safety of staff.
Smart Images
Figure CN223986788U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to current transformer equipment technical field, concretely relates to a current transformer secondary circuit short circuit line combination wire head. BACKGROUND
[0002] Secondary circuit refers to all low voltage circuits such as measurement circuit, relay protection circuit and switch control. Secondary equipment is connected with each other to form an electrical circuit for monitoring, controlling, adjusting and protecting primary equipment. In electrical system, it is a circuit connected by secondary winding of current transformer (CT), measurement monitoring instrument and relay through control cable. At present, current transformer is widely used in power system relay protection to obtain primary equipment current, thereby realizing current sampling input function of protection device. When carrying out actual maintenance, defect treatment and other work, relay protection personnel need to short circuit current transformer secondary circuit.
[0003] The technical personnel engaged in the industry find that current transformer causes great load to line during power transformation from large current to low current, thereby causing line short circuit, and the work of replacing secondary wiring terminal box by power-off operation causes power supply reliability of distribution transformer to decrease, and also causes open circuit of current transformer secondary circuit, produces large current and causes personnel casualty accident, therefore, the utility model provides a current transformer secondary circuit short circuit line combination wire head. UTILITY MODEL CONTENTS
[0004] The utility model discloses a current transformer secondary circuit short circuit line combination wire head.
[0005] The utility model discloses a current transformer secondary circuit short circuit line combination wire head.
[0006] The utility model relates to a current transformer secondary circuit short circuit line combination wire end, including main line, the right end of main line is equipped with branch line, the circumferential surface of one end of main line is equipped with fixed tube near branch line, the one end of branch line is equipped with connecting head near main line, the circumferential surface of connecting head is equipped with connecting ring, the one end of main line is equipped with plug in the middle part, the middle part of fixed tube is equipped with connecting pipe, the side wall of connecting pipe is opened with connecting groove towards branch line, the connecting ring is screwed in connecting groove, the middle part of connecting pipe is equipped with fixed plate, a plurality of fixed holes are opened in fixed plate, the connecting head is inserted on plug through fixed hole, the circumferential surface of one end of connecting pipe is opened with two circular grooves near main line, spring is installed in circular groove, the opening end of circular groove is equipped with limiting post, the circumferential surface of fixed tube is opened with limiting hole symmetrically, limiting post is installed in limiting hole.
[0007] Further, the limiting groove is formed in the inner wall of the middle part of the fixed tube, and the limiting blocks are symmetrically installed on the circumferential surface of one end of the connecting tube towards the main line.
[0008] Further, the fixed tube and the connecting tube are made of insulating material.
[0009] Further, the outer thread formed on the circumferential surface of the connecting ring is consistent with the inner thread formed in the connecting groove.
[0010] Further, the diameters of the fixed holes are different, and the fixed holes with the same diameter are uniformly distributed in the fixed plate.
[0011] Further, the diameters of the limiting posts are consistent with the diameters of the limiting holes, and the angles between the limiting holes on the same side are consistent with the angles between the adjacent fixed holes.
[0012] Further, the vertical section of the limiting block is consistent with the vertical section of the limiting groove.
[0013] The utility model has the advantages of the following:
[0014] 1. In use, this utility model connects the connecting ring mounted on the circumferential surface of the connector to the connecting pipe via a threaded connection. The connector then passes through the fixing hole in the fixing plate to connect with the plug, thus connecting the branch line to the main line. When the current transformer is converting a large current to a low current and the load in the branch line is too large and needs to be replaced, the connecting ring is rotated in the reverse direction to remove the branch line. The limiting post is then moved to different limiting holes, and the connecting pipe is rotated in the fixing pipe. Connectors of different sizes are then inserted into the plug through the fixing holes and fixed by the connecting ring. This prevents the branch line from generating a large load, which could lead to a short circuit and endanger workers.
[0015] 2. When this utility model is in use, the limiting block installed in the limiting groove can prevent the connecting pipe from shaking too much in the fixed pipe during the rotation of the connecting pipe, thereby affecting the stability of the connector on the plug.
[0016] 3. When this utility model is in use, by opening fixing holes of different diameters, it can avoid causing a large load on the line during the process of the current transformer converting large current to low current, thus avoiding the line short circuit. The power conversion work can be completed by replacing the branch line with a larger model. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0018] Figure 2 This is an exploded view of the present invention;
[0019] Figure 3 This is an overall cross-sectional view of the present invention;
[0020] Figure 4 This is a cross-sectional view of the connecting pipe of this utility model.
[0021] Reference numerals in the attached diagram: 1. Main line; 2. Branch line; 3. Fixing pipe; 4. Connector; 5. Connecting ring; 6. Plug; 7. Connecting pipe; 8. Connecting groove; 9. Fixing plate; 10. Fixing hole; 11. Circular groove; 12. Spring; 13. Limiting post; 14. Limiting hole; 15. Limiting groove; 16. Limiting block. Detailed Implementation
[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.
[0023] Please see Figures 1-4This utility model provides a shorting connector assembly for the secondary circuit of a current transformer, including a main line 1, a branch line 2 installed at the right end of the main line 1, a fixing tube 3 sleeved on the circumferential surface of the end of the main line 1 near the branch line 2, a connector 4 provided at the end of the branch line 2 near the main line 1, a connecting ring 5 movably installed on the circumferential surface of the connector 4, a plug 6 provided in the middle of the end of the main line 1 near the branch line 2, a connecting tube 7 movably installed in the middle of the fixing tube 3, and a connecting groove 8 opened on the side wall of the connecting tube 7 facing the branch line 2. The connecting ring 5 is threaded into the connecting groove 8. A fixing plate 9 is fixedly installed in the middle of the connecting tube 7. Several fixing holes 10 are opened in the fixing plate 9. The connector 4 passes through the fixing holes 10 and is inserted into the plug 6. Two circular grooves 11 are symmetrically opened on the circumferential surface of the connecting tube 7 near the main line 1. A spring 12 is movably installed in the circular groove 11. A limit post 13 is movably installed at the open end of the circular groove 11. Limit holes 14 are symmetrically opened on the circumferential surface of the fixing tube 3. The limit post 13 is movably installed in the limit hole 14.
[0024] In this embodiment, preferably, a limiting groove 15 is formed on the inner wall of the middle part of the fixed tube 3, and two limiting blocks 16 are symmetrically installed on the circumferential surface of the end of the connecting tube 7 facing the main line 1. The limiting blocks 16 are movably installed in the limiting groove 15. By installing the limiting blocks 16 in the limiting groove 15, the connecting tube 7 can be prevented from shaking significantly in the fixed tube 3 during the rotation of the connecting tube 7, thereby affecting the stability of the connector 4 on the plug 6.
[0025] In this embodiment, preferably, the fixing pipe 3 and the connecting pipe 7 are made of insulating material; by using the fixing pipe 3 and the connecting pipe 7 made of insulating material, the connection between the main line 1 and the branch line 2 can be made safer, thereby avoiding the danger to workers caused by leakage.
[0026] In this embodiment, preferably, the external thread size on the circumferential surface of the connecting ring 5 is the same as the internal thread size inside the connecting groove 8. When the external thread size on the circumferential surface of the connecting ring 5 is the same as the internal thread size inside the connecting groove 8, the connector 4 installed on the branch line 2 can be fixed on the connecting pipe 7 through the connecting ring 5, thereby allowing the connector 4 to be stably connected to the plug 6.
[0027] In this embodiment, preferably, the diameters of the fixing holes 10 are different, and the fixing holes 10 of the same diameter are evenly distributed in the fixing plate 9. By opening fixing holes 10 of different diameters, it is possible to avoid a large load on the line during the process of the current transformer converting from a large current to a low current, thereby preventing a short circuit in the line. The conversion work can be completed by replacing the branch line 6 with a larger model.
[0028] In this embodiment, preferably, the diameter of the limiting post 13 is the same as the diameter of the limiting hole 14, and the angle between the limiting holes 14 on the same side is the same as the angle between the adjacent fixing holes 10. When the diameter of the limiting post 13 is the same as the diameter of the limiting hole 14, the connecting tube 7 can be fixed in the fixing tube 3 by the limiting post 13. Then, the angle between the limiting holes 14 on the same side is the same as the angle between the adjacent fixing holes 10. When the limiting post 13 is pressed, the limiting post 13 can be moved into different limiting holes 14. Then, when the connecting tube 7 is rotated in the fixing tube 3, the angle of rotation of the connecting tube 7 is consistent with the angle between the adjacent fixing holes 10 in the fixing plate 9. Thus, during the replacement of the branch line 2, the connectors 4 of different sizes can be inserted into the plug 6 through the fixing holes 10.
[0029] In this embodiment, preferably, the vertical cross-section of the limiting block 15 is the same as the vertical cross-section of the limiting groove 16. When the vertical cross-section of the limiting block 15 is the same as the vertical cross-section of the limiting groove 16, the gap between the limiting block 15 and the limiting groove 16 can be reduced, thereby allowing the limiting block 15 to move the connecting pipe 7 more stably in the fixed pipe 3.
[0030] The working principle and usage process of this utility model are as follows: When using this device, the connecting ring 5 installed on the circumferential surface of the connector 4 is threadedly connected to the connecting pipe 7. Then, the connector 4 passes through the fixing hole 10 opened in the fixing plate 9 to connect with the plug 4, thereby connecting the branch line 2 to the main line 1. When the current transformer is converting a large current to a low current, and the load in the branch line 2 is too large and needs to be replaced, the connecting ring 5 is rotated in the reverse direction to remove the branch line 2. Then, the limiting post 13 is moved to different limiting holes 14, and the connecting pipe 7 is rotated in the fixing pipe 3. Then, the connectors 4 of different sizes are inserted into the plug 6 through the fixing hole 10 and fixed by the connecting ring 5. This prevents the branch line 2 from generating a large load, which could cause a short circuit and endanger the workers.
[0031] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A combination tap for a current transformer secondary circuit shorting link, characterized by: The utility model relates to a kind of fixed tube and connecting pipe, including main line (1), the right end of the main line (1) is equipped with branch line (2), the circumferential surface of the one end of the main line (1) close to the branch line (2) is sleeved with fixed tube (3), the one end of the branch line (2) close to the main line (1) is provided with connector (4), the circumferential surface of the connector (4) is movably installed with connecting ring (5), the one end of the main line (1) close to the branch line (2) is provided with plug (6), the middle part of the fixed tube (3) is movably installed with connecting pipe (7), the side wall of the connecting pipe (7) is opened with connecting groove (8) towards the branch line (2), the connecting ring (5) is screwed in the connecting groove (8), the middle part of the connecting pipe (7) is fixedly installed with fixed plate (9), a plurality of fixed holes (10) are opened in the fixed plate (9), the connector (4) is inserted on the plug (6) in the fixed hole (10), the circumferential surface of the one end of the connecting pipe (7) close to the main line (1) is opened with two circular grooves (11) symmetrically, the circular groove (11) is movably installed with spring (12), the opening end of the circular groove (11) is movably installed with limit post (13), the circumferential surface of the fixed tube (3) is opened with limit hole (14) symmetrically, the limit post (13) is movably installed in the limit hole (14).
2. The combination tap of claim 1, wherein, Limit groove (15) is opened in the inner wall of the middle part of the fixed tube (3), the circumferential surface of the one end of the connecting pipe (7) towards the main line (1) is installed with two limit blocks (16) symmetrically, the limit block (16) is movably installed in the limit groove (15).
3. The combination tap of claim 1, wherein, The material of the fixed tube (3) and the connecting pipe (7) is insulating material.
4. The combination tap of claim 1, wherein, The size of external thread opened in the circumferential surface of the connecting ring (5) is consistent with the size of internal thread opened in the connecting groove (8).
5. The combination tap of a current transformer secondary circuit shorting link according to claim 1, characterized in that, The diameters of a plurality of fixed holes (10) are different, and the fixed holes (10) with same diameter are evenly distributed in fixed plate (9).
6. The combination tap of a current transformer secondary circuit shorting link according to claim 1, characterized in that, The diameter of the limit post (13) is consistent with the diameter of the limit hole (14), and the angle between the limit hole (14) on the same side is consistent with the angle between adjacent fixed holes (10).
7. The combination tap of a current transformer secondary circuit shorting link according to claim 2, characterized in that, The vertical section of the limit block (16) is consistent with the size of the vertical section of the limit groove (15).