Quick short-circuit bar for protection test

Abstract

The utility model provides a quick short circuit bar for a protection test, which comprises a plurality of splice plates spliced end to end, conducting strips are arranged in the splice plates, after the splice plates are spliced, the conducting strips in the adjacent splice plates are communicated with each other, two connecting blocks arranged at intervals are fixedly connected on the same side of the splice plates, and the two connecting blocks are connected with the splice plates. A terminal is arranged between the connecting blocks, the terminal is rotatably installed on the connecting blocks, one end of the terminal is provided with a connecting end communicated with the conducting strip, the other end of the terminal is provided with an installing end connected with a relay protection CT loop, and the connecting end and the installing end are conductively connected through a wire. And the terminal is rotated to realize conduction and disconnection between the CT loop and the conducting strip. The modularized splice plate design allows a user to flexibly adjust the number of the short circuit bars according to actual requirements, extra cutting or connecting work is not needed, the preparation time is greatly shortened, and the working efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of terminal block technology, and in particular to a quick-connect busbar for protection testing. Background Technology

[0002] In power systems, relay protection devices are used to detect abnormal conditions and quickly disconnect faulty parts to prevent damage and ensure safety. Current transformers (CTs) are crucial components of relay protection systems, converting high-current signals into low-current signals suitable for relays and other measuring devices. During relay protection tests, to simulate fault conditions or verify the correctness of the protection device, it is typically necessary to short-circuit the secondary side of the CT.

[0003] Traditionally, engineers have relied on standard test lines when performing such short-circuit operations. However, these test lines have some significant problems:

[0004] Excessively long connecting wires: The connecting wires in the middle of the conventional test line are relatively long, which not only increases the complexity of the wiring, but also easily generates a large number of redundant connecting wires during the implementation of safety measures;

[0005] Risk of detachment: Due to the long length and potential messiness of the test lines, the risk of on-site personnel accidentally touching or coming into contact with the test lines increases, which may cause the shorting wires to detach.

[0006] CT open circuit risk: If the jumper wire comes loose, it may cause an open circuit on the secondary side of the CT, which may lead to serious safety problems such as overvoltage, equipment damage or personal injury.

[0007] Non-compact structure: Traditional short-circuit methods often lack integrated design, which can easily lead to structural redundancy, increasing the risk of electric shock and other safety hazards. Utility Model Content

[0008] To address the shortcomings of existing technologies, this utility model provides a quick-connect busbar for protection testing. To achieve the above objective, this utility model adopts the following technical solution:

[0009] A quick-connecting busbar for protection testing includes several splicing plates joined end-to-end. Conductive sheets are installed within each splicing plate. After the splicing plates are joined, the conductive sheets in adjacent splicing plates are interconnected. Two spaced-apart connecting blocks are fixedly connected to the same side of each splicing plate. Terminals are provided between the connecting blocks. The terminals are rotatably mounted on the connecting blocks. One end of each terminal has a connection terminal connected to the conductive sheet, and the other end has an installation terminal connected to the current transformer (CT) circuit of a relay protection device. The connection terminal and the installation terminal are electrically connected via a wire. Rotating the terminal enables the CT circuit to conduct electricity and disconnect from the conductive sheet.

[0010] Furthermore, one end of the splicing plate is provided with a groove, and the conductive sheet protrudes from the groove at one end. The other end of the splicing plate is provided with a locking block that cooperates with the groove, and the conductive sheet protrudes from the locking block at one end.

[0011] Furthermore, a tapered groove that gradually increases in size from top to bottom is provided at the position corresponding to the splicing plate and the connecting end, and the middle part of the conductive sheet is pulled to the bottom end of the tapered groove.

[0012] Furthermore, a spring is installed inside the conical groove, with one end of the spring fixed to the splicing plate and the other end fixed to the back of the conductive sheet connected to the connecting end.

[0013] Furthermore, a baffle is fixedly connected to the portion of the conductive sheet located in the conical groove, and the baffle covers both sides of the spring.

[0014] Furthermore, an annular retaining ring is fixedly connected to the mounting end, and the retaining ring is used to limit the position of the terminals on the CT circuit.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The modular splicing panel design allows users to flexibly adjust the number of short strips according to actual needs, without the need for additional cutting or connecting work, which greatly shortens preparation time and improves work efficiency.

[0017] 2. The compact structure and robust connection mechanism effectively avoid the problem of traditional short-circuit wires easily coming loose, eliminate the risk of open circuit on the secondary side of the CT, reduce the possibility of electric shock, and improve the safety of on-site work.

[0018] 3. Compared with the traditional long-line short-circuiting method, the short-circuit busbar of the present invention is smaller in size and more neatly arranged, which helps to maintain a clean working environment and reduces space occupation;

[0019] 4. The integrated design and clear labeling make the jumper bar easy to identify and manage, facilitating daily maintenance and inspection, and reducing potential risks caused by equipment failure or human error. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0021] Figure 1 This is a schematic diagram of the main structure of the terminal disconnected state in an embodiment of the present invention;

[0022] Figure 2 This is a top view of the structure of the present invention with the terminals short-circuited in an embodiment.

[0023] Figure 3 for Figure 2 Large-scale structural diagram of point A in the middle.

[0024] In the above attached figures: splicing plate 1, conductive sheet 2, connecting block 3, terminal 4, connecting post 5, connecting end 6, mounting end 7, groove 8, locking block 9, conical groove 10, spring 11, baffle 12, retaining ring 13. Detailed Implementation

[0025] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0026] Please refer to Figures 1-3 As shown, a quick-connect busbar for protection testing includes several splicing plates 1 joined end-to-end. Conductive sheets 2 are installed within each splicing plate 1. After the splicing plates 1 are joined, the conductive sheets 2 within adjacent splicing plates 1 are interconnected. Two spaced-apart connecting blocks 3 are fixedly connected to the same side of each splicing plate 1. A terminal 4 is provided between the connecting blocks 3. The terminal 4 is rotatably mounted on the connecting block 3. A connecting hole is provided on the connecting block 3. A connecting post 5 is provided on the terminal 4, and the connecting post 5 is rotatably connected to the connecting hole. One end of the terminal 4 is equipped with a connecting end 6 that communicates with the conductive sheet 2, and the other end is equipped with an installation end 7 that connects to the CT circuit of the relay protection. The connecting end 6 and the installation end 7 are electrically connected by a wire. Rotating the terminal 4 enables the CT circuit to conduct electricity and disconnect from the conductive sheet 2.

[0027] Working Principle: The shorting strip consists of several interconnected splicing plates 1, each with a conductive sheet 2 installed inside. When the splicing plates 1 are spliced ​​together, the conductive sheets 2 in adjacent splicing plates 1 automatically connect, forming a continuous conductive path. This method not only simplifies the shorting process but also improves the reliability and safety of the shorting. Two spaced-apart connecting blocks 3 are fixed on one side of each splicing plate 1, with a terminal 4 between the two connecting blocks 3. The terminal 4 can rotate around the connecting block 3, with a connecting end 6 connected to the conductive sheet 2 at one end and an installation end 7 connected to the CT circuit at the other end. The connecting end 6 and the installation end 7 are electrically connected by a wire, allowing easy connection or disconnection between the CT circuit and the conductive sheet 2 by rotating the terminal 4. Before use, adjust the terminal 4 to connect to the CT circuit as needed. After use, disconnect the entire shorting strip from the CT circuit. Readjust the terminal 4 to connect to the CT circuit before the next use. Both the terminal 4 and the conductive sheet 2 can be made of copper.

[0028] In this embodiment, please refer to Figure 2As shown, one end of the splicing plate 1 has a groove 8, and the conductive sheet 2 protrudes from the groove 8 at one end. The other end of the splicing plate 1 is provided with a locking block 9 that cooperates with the groove 8, and the conductive sheet 2 protrudes from the locking block 9 at one end. By using the locking block 9 to cooperate with the groove 8, two adjacent splicing plates 1 can be spliced ​​into a row structure.

[0029] In this embodiment, please refer to Figure 1 , Figure 2 As shown, the splicing plate 1 has a tapered groove 10 that gradually increases in size from top to bottom at the position corresponding to the connecting end 6, and the middle part of the conductive sheet 2 is pulled to the bottom end of the tapered groove 10. During the rotation of the terminal 4, the connecting end 6 of the terminal 4 passes through the tapered groove 10 and finally abuts against the conductive sheet 2 to connect the conductive sheet 2 and the CT circuit.

[0030] In this embodiment, please refer to Figure 3 As shown, a spring 11 is installed inside the conical groove 10. One end of the spring 11 is fixed to the splicing plate 1, and the other end is fixed to the back of the conductive sheet 2 connected to the connecting end 6. The spring 11 makes the contact between the conductive sheet 2 and the connecting end 6 more secure.

[0031] In this embodiment, please refer to Figure 3 As shown, a baffle 12 is fixedly connected to the portion of the conductive sheet 2 located in the conical groove 10, and the baffle 12 covers both sides of the spring 11. The baffle 12 facilitates the connection end 6 to rest against the baffle 12 to press back the conductive sheet 2, and finally the connection end 6 abuts against the conductive sheet 2 under the action of the spring 11, which facilitates the connection between the connection end 6 and the conductive sheet 2.

[0032] In this embodiment, please refer to Figure 1 , Figure 2 As shown, an annular retaining ring 13 is fixedly connected to the mounting end 7. The retaining ring 13 is used to limit the position of the terminal 4 on the CT circuit. The retaining ring 13 is used to limit the position of the mounting end 7 and the CT circuit, which facilitates the installation of the entire shorting bar.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A quick-connect busbar for protection testing, characterized in that, The system comprises several splicing panels joined end-to-end. Each splicing panel contains a conductive sheet. After the panels are joined, the conductive sheets in adjacent panels are interconnected. Two spaced-apart connecting blocks are fixedly connected to the same side of each splicing panel. A terminal is provided between the connecting blocks. The terminal is rotatably mounted on the connecting block. One end of the terminal is connected to the conductive sheet, and the other end is connected to the mounting end for connection to the CT circuit of the relay protection. The connecting end and the mounting end are connected. Rotating the terminal enables the CT circuit to conduct electricity and disconnect from the conductive sheet.

2. The rapid shorting busbar for protection testing according to claim 1, characterized in that: One end of the splicing plate is provided with a groove, and the conductive sheet protrudes from the groove at one end. The other end of the splicing plate is provided with a locking block that cooperates with the groove, and the conductive sheet protrudes from the locking block at one end.

3. The rapid shorting busbar for protection testing according to claim 1, characterized in that: The splicing plate has a tapered groove that gradually increases in size from top to bottom at the position corresponding to the connecting end, and the middle part of the conductive sheet is pulled to the bottom end of the tapered groove.

4. A quick-connect busbar for protection testing according to claim 3, characterized in that: A spring is installed inside the conical groove. One end of the spring is fixed to the splicing plate, and the other end is fixed to the back of the conductive sheet connected to the connection end.

5. A quick-connect busbar for protection testing according to claim 4, characterized in that: The conductive sheet is fixedly connected to a baffle plate at the portion of the tapered groove, and the baffle plate covers both sides of the spring.

6. A quick-connect busbar for protection testing according to claim 1, characterized in that: A ring-shaped retaining ring is fixedly connected to the mounting end, and the retaining ring is used to limit the position of the terminals on the CT circuit.

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