Loop resistance test wire connector of high-voltage circuit breaker

Abstract

The utility model discloses a high-voltage circuit breaker loop resistance test wire joint, which comprises a red copper cylindrical rod electrode, a red copper bolt, a copper gasket, a triangular pull ring and a test wire pressing nose, and is characterized in that the red copper cylindrical rod electrode is used for being inserted into a bundled tulip contact during testing; the tail part of the red copper bolt is fixedly connected with the copper gasket; the test wire pressing nose is fixedly pressed on the red copper cylindrical rod pole through the red copper bolt and the copper gasket; and the triangular pull ring is fixedly connected with the copper gasket. Therefore, the red copper cylindrical rod pole is matched with the binding type contact, so that the contact area is greatly increased, poor contact is avoided, the loop resistance under a working condition can be accurately measured, the reliability of a test result is improved, high-current heat production is reduced through good contact, a binding type contact fastening spring is prevented from being burnt out, a circuit breaker part is protected, and the service life is prolonged; the triangular pull ring facilitates operation and efficiency improvement, and the connection mode simulates the actual working condition, so that the test result has higher reference value.

Description

Technical Field

[0001] This utility model relates to the technical field of electrical equipment testing, and in particular to a connector for a high-voltage circuit breaker circuit resistance test lead. Background Technology

[0002] In power systems, high-voltage circuit breakers are critical equipment, and their operational reliability is essential for the safe and stable operation of the entire power system. Regular preventative testing of high-voltage circuit breakers is a vital means of ensuring their reliable operation, and loop resistance testing is an indispensable test item.

[0003] Currently, most common loop resistance testing devices on the market use ordinary alligator clips for their test leads. However, ordinary alligator clips have several drawbacks when used for loop resistance testing of high-voltage circuit breakers: Firstly, the contact area of ​​the alligator clips is small. During loop resistance testing, the small contact area results in a relatively high contact resistance, easily leading to poor contact and consequently, inaccurate measured loop resistance values ​​that fail to accurately reflect the actual loop resistance of the high-voltage circuit breaker under real-world operating conditions. Secondly, the test current during loop resistance testing can reach 100A. In cases of poor contact, this high current generates a large amount of heat at the contact point, easily burning out the fastening springs on the circuit breaker's bundled splice contacts, affecting the circuit breaker's normal performance and service life.

[0004] Furthermore, traditional alligator clips, when connected to the loop contacts of circuit breakers, cannot accurately simulate the actual connection state of the circuit breaker during operation, significantly reducing the reference value of the test results. Therefore, it is urgent to develop a test connector that can solve the above problems, accurately measure loop resistance, avoid damage to circuit breaker components, and simulate actual operating conditions. Utility Model Content

[0005] This utility model aims to at least partially solve one of the technical problems in the related art.

[0006] Therefore, the purpose of this utility model is to propose a high-voltage circuit breaker circuit resistance test lead connector, which uses a copper cylindrical rod pole and a bundled contact to greatly increase the contact area, avoid poor contact, accurately measure the circuit resistance under operating conditions, improve the reliability of test results, reduce heat generation from high current, avoid burning the bundled contact fastening spring, protect circuit breaker components and extend their life, and the triangular pull ring facilitates operation and improves efficiency. This connection method simulates actual operating conditions, making the test results more valuable.

[0007] To achieve the above objectives, this utility model proposes a high-voltage circuit breaker circuit resistance test lead connector, comprising a copper cylindrical rod, a copper bolt, a copper washer, a triangular pull ring, and a test lead clamping lug. The copper cylindrical rod is used to insert into a bundled perforated contact during testing. The tail of the copper bolt is fixedly connected to the copper washer, and the test lead clamping lug is fixedly pressed onto the copper cylindrical rod by the copper bolt and the copper washer. The triangular pull ring is fixedly connected to the copper washer and located away from the end connected to the test lead clamping lug, facilitating operation by the testing personnel.

[0008] This utility model discloses a high-voltage circuit breaker circuit resistance test lead connector, which uses a copper cylindrical rod pole and a bundled contact to significantly increase the contact area, avoid poor contact, accurately measure the circuit resistance under operating conditions, improve the reliability of test results, reduce heat generation from high current, prevent burnout of the bundled contact fastening spring, protect circuit breaker components, and extend their lifespan. The triangular pull ring facilitates operation and improves efficiency. This connection method simulates actual operating conditions, making the test results more valuable for reference.

[0009] In addition, the high-voltage circuit breaker circuit resistance test lead connector proposed in the above application may also have the following additional technical features:

[0010] Specifically, the copper bolt passes through the test wire lug and the copper washer and is threaded to the copper cylindrical rod, thus tightly fixing the test wire lug onto the copper cylindrical rod.

[0011] Specifically, the triangular pull ring and the copper cylindrical rod are integrally formed.

[0012] Specifically, the diameter of the copper cylindrical rod is matched with the inner diameter of the bundled plum blossom contact to ensure tight insertion and good contact during testing.

[0013] Specifically, the diameter of the copper washer is larger than the head diameter of the copper bolt to ensure that the test wire lug can be evenly pressed onto the copper cylindrical rod.

[0014] The advantages of this invention compared to existing technologies are as follows:

[0015] (1) By using a copper cylindrical rod electrode and a bundled plum blossom contact to fit together, the contact area is greatly increased, which effectively avoids poor contact and can accurately measure the circuit resistance under working conditions, thus improving the reliability and accuracy of the test results.

[0016] (2) Due to good contact, the heat generated when a large current passes through is reduced, avoiding the problem of the circuit breaker's bundled plum blossom contact fastening spring being burned due to poor contact, as is the case with traditional alligator clips. This protects the key components of the circuit breaker and extends its service life.

[0017] (3) The design of the triangular pull ring facilitates the operation of the test personnel and improves the efficiency of the test work. At the same time, the connection method of inserting the copper cylindrical rod pole into the bundled plum blossom contact can better simulate the connection state of the circuit breaker during actual operation, making the test results more valuable.

[0018] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0019] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, in which:

[0020] Figure 1 This is a schematic diagram of a copper cylindrical rod structure for a high-voltage circuit breaker circuit resistance test line connector according to an embodiment of the present invention.

[0021] Figure 2 This is a schematic diagram of a copper bolt, copper washer, and triangular pull ring structure of a high-voltage circuit breaker circuit resistance test line connector according to an embodiment of the present invention.

[0022] Figure 3 This is a schematic diagram of the integrated assembly of a high-voltage circuit breaker circuit resistance test lead connector according to an embodiment of the present invention.

[0023] Figure 4 This is a schematic diagram of a bundled plum blossom contact structure;

[0024] Figure 5 This refers to the test lead connectors for commonly used loop resistance testers.

[0025] As shown in the figure: 1. Copper cylindrical rod; 2. Copper bolt; 3. Copper washer; 4. Triangular pull ring; 5. Test wire clamping lug. Detailed Implementation

[0026] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention. Rather, the embodiments of the present invention include all variations, modifications, and equivalents falling within the spirit and scope of the appended claims.

[0027] The following description, in conjunction with the accompanying drawings, describes a high-voltage circuit breaker circuit resistance test lead connector according to an embodiment of the present invention.

[0028] like Figures 1-5 As shown, a high-voltage circuit breaker circuit resistance test lead connector according to an embodiment of the present invention includes a copper cylindrical rod 1, a copper bolt 2, a copper washer 3, a triangular pull ring 4, and a test lead clamping lug 5.

[0029] As can be understood, firstly, the test lead clamping lug 5 is connected to the test lead, and it is responsible for stably connecting the test lead to the test lead connector. The copper bolt 2 and the copper washer 3 work together; the tail of the copper bolt 2 is fixedly connected to the copper washer 3. The test lead clamping lug 5 is placed between the copper washer 3 and the copper cylindrical rod 1. By tightening the copper bolt 2, the test lead clamping lug 5 is firmly fixed and pressed onto the copper cylindrical rod 1, ensuring a stable electrical connection between the test lead and the copper cylindrical rod 1, and guaranteeing stable current transmission.

[0030] During testing, the operator holds the triangular pull ring 4. Since the triangular pull ring 4 is fixedly connected to the copper gasket 3 and positioned far from the test lead lug 5 connection end, it is easy to operate. By pressing the triangular pull ring 4, the operator pushes the entire connected structure, inserting the copper cylindrical rod 1 into the bundled sprite contact. At this point, the test lead connector is connected to the bundled sprite contact of the high-voltage circuit breaker, and the loop resistance test can be performed.

[0031] After the test, the tester held the triangular pull ring 4 again and pulled it in the opposite direction, causing the copper cylindrical rod 1 to be pulled out from the bundled plum blossom contact, completing the separation operation between the test lead connector and the high-voltage circuit breaker. The whole test process was convenient and efficient.

[0032] In one embodiment of this utility model, such as Figures 1-5 As shown, the copper bolt 2 passes through the test wire lug 5 and the copper washer 3 and is threaded to the copper cylindrical rod 1, thus tightly fixing the test wire lug 5 to the copper cylindrical rod 1.

[0033] It is understandable that, firstly, the various components to be installed are prepared, namely, copper bolts 2, test wire lugs 5 with test leads (test leads and test wire lugs 5 are pre-connected), copper washers 3, and copper cylindrical rods 1.

[0034] At the start of assembly, place the copper washer 3 onto the copper bolt 2. The copper washer 3 serves to distribute pressure and ensure uniform contact. Then, pass the copper bolt 2 with the copper washer 3 on it through the corresponding mounting hole on the test lead lug 5. In this step, ensure that the test lead lug 5 is positioned correctly, with the end connecting to the test lead facing the appropriate direction for subsequent connection to the testing equipment.

[0035] Next, align the copper bolt 2, which passes through the test lead lug 5 and the copper washer 3, with the pre-set threaded hole on the copper cylindrical rod 1. The threaded hole on the copper cylindrical rod 1 matches the thread specification of the copper bolt 2. By rotating the copper bolt 2 clockwise, it is gradually screwed into the threaded hole of the copper cylindrical rod 1. During the rotation, as the copper bolt 2 goes deeper, the copper washer 3 gradually presses the test lead lug 5 tightly. Because the threaded connection of the copper bolt 2 has a tightening effect, as the tightening degree increases, the test lead lug 5 will be tightly fixed on the copper cylindrical rod 1, ensuring a stable and reliable electrical connection between the two, reducing contact resistance, and ensuring that the current can pass smoothly during loop resistance testing, thereby providing a guarantee for accurate measurement.

[0036] When the test is finished and the test lead connector needs to be disassembled, the operation should be performed in the reverse order, that is, rotate the copper bolt 2 counterclockwise to remove it from the threaded hole of the copper cylindrical rod 1. After the copper bolt 2 is completely disengaged from the threaded hole, the test lead lug 5 and copper washer 3 can be removed from the copper cylindrical rod 1 to complete the disassembly process.

[0037] In one embodiment of this utility model, such as Figures 1-5 As shown, the triangular pull ring 4 and the copper cylindrical rod 1 are integrally formed.

[0038] It is understandable that, since it is molded as a single piece, there are no gaps or weak points between the two parts, thus ensuring the strength and stability of the overall structure.

[0039] In one embodiment of this utility model, such as Figures 1-5 As shown, the diameter of the copper cylindrical rod 1 matches the inner diameter of the bundled plum blossom contact, ensuring that it can be tightly inserted and maintain good contact during testing.

[0040] It is understandable that the diameter of the copper cylindrical rod 1 will be slightly smaller than the inner diameter of the bundled plum blossom contact, but the difference is controlled within a very small range to ensure both smooth insertion and a tight fit. By strictly controlling the matching between the diameter of the copper cylindrical rod 1 and the inner diameter of the bundled plum blossom contact, it is ensured that the two are tightly inserted and maintain good contact during the test, improving the accuracy and reliability of the circuit resistance test and ensuring the smooth progress of the preventive testing of the high-voltage circuit breaker.

[0041] In one embodiment of this utility model, such as Figures 1-5 As shown, the diameter of the copper washer 3 is larger than the head diameter of the copper bolt 2 to ensure that the test line clamping lug 5 can be uniformly pressed onto the copper cylindrical rod 1.

[0042] It is understandable that, since the diameter of the copper washer 3 is larger than the head diameter of the copper bolt 2, the copper washer 3 will play a role in dispersing the pressure when the head of the copper bolt 2 is pressing the test wire lug 5.

[0043] By using a design where the diameter of the copper washer 3 is larger than the diameter of the head of the copper bolt 2, it is possible to effectively ensure that the test lead lug 5 is evenly pressed onto the copper cylindrical rod 1 during actual operation, thereby improving the connection reliability of the test lead connector and the accuracy of the test results.

[0044] Specifically, in actual implementation, assuming that a loop resistance test needs to be performed on a high-voltage circuit breaker, the test lead connector of this utility model will be used, and the specific workflow is as follows:

[0045] 1. Preparation Stage: Check and confirm that the test lead is securely connected to the test lead lug 5. Prepare the cylindrical copper rod 1, the copper bolt 2 with copper washer 3, and the triangular pull ring 4 integrally formed with the cylindrical copper rod 1. Ensure that the diameter of the cylindrical copper rod 1 matches the inner diameter of the bundled spline contact of the high-voltage circuit breaker to be tested, and at the same time check that the diameter of the copper washer 3 is larger than the head diameter of the copper bolt 2.

[0046] 2. Install the test lead connector: Pass the copper bolt 2, with the copper washer 3 already fitted, through the corresponding mounting hole on the test lead lug 5. Note the orientation of the test lead lug 5 and the end connected to the test lead to ensure it meets the requirements for subsequent connection with the testing equipment. Align the copper bolt 2, which passes through the test lead lug 5 and the copper washer 3, with the pre-set threaded hole on the copper cylindrical rod 1. Then, rotate the copper bolt 2 clockwise. As the copper bolt 2 gradually screws into the threaded hole of the copper cylindrical rod 1, the copper washer 3 will gradually press the test lead lug 5 tightly until the test lead lug 5 is firmly fixed to the copper cylindrical rod 1, ensuring a stable electrical connection between the two.

[0047] 3. Test Connection Stage: The tester holds the triangular pull ring 4. Since the triangular pull ring 4 and the copper cylindrical rod 1 are integrally formed, the operation is stable and reliable. The copper cylindrical rod 1 is slowly aligned with the bundled sprite contact of the high-voltage circuit breaker. The triangular pull ring 4 is gently pressed, pushing the copper cylindrical rod 1 into the bundled sprite contact. Because the diameter of the copper cylindrical rod 1 matches the inner diameter of the bundled sprite contact, insertion is smooth and ensures tight contact, completing the connection between the test lead connector and the high-voltage circuit breaker.

[0048] 4. Testing Phase: After connecting the test lead connector to the high-voltage circuit breaker, connect the other end of the testing equipment to the test lead, start the testing equipment, and perform the loop resistance test. At this time, the test current is stably transmitted to the bundled sprite contact of the high-voltage circuit breaker through the test lead, test lead lug 5, and copper cylindrical rod 1. The testing equipment records the accurate loop resistance value.

[0049] 5. Post-test disassembly stage: After the test is completed, the tester holds the triangular pull ring 4 again and pulls it in the opposite direction to smoothly pull the copper cylindrical rod 1 out of the bundled spline contact. Then, rotate the copper bolt 2 counterclockwise to remove it from the threaded hole of the copper cylindrical rod 1. After the copper bolt 2 is completely disengaged from the threaded hole, remove the test lead lug 5 and copper washer 3 from the copper cylindrical rod 1, tidy up all components, and the test is complete.

[0050] In summary, the high-voltage circuit breaker circuit resistance test lead connector of this utility model adopts a copper cylindrical rod with a bundled contact, which greatly increases the contact area, avoids poor contact, can accurately measure the circuit resistance under operating conditions, improves the reliability of test results, reduces heat generation from high current, avoids burning the bundled contact fastening spring, protects circuit breaker components and extends their life, and the triangular pull ring facilitates operation and improves efficiency. This connection method simulates actual operating conditions, making the test results more valuable.

[0051] In the description of this specification, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0052] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0053] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A high voltage circuit breaker loop resistance test line connector, comprising: The utility model relates to a test line pressure wire nose structure of bundled pin contact, including red copper cylindrical rod pole (1), red copper bolt (2), copper gasket (3), triangular pull ring (4) and test line pressure wire nose (5), wherein, The red copper cylindrical rod pole (1) is used for being inserted into the bundled pin contact inside during testing; The tail of the red copper bolt (2) is fixedly connected with the copper gasket (3), and the test line pressure wire nose (5) is fixedly and tightly pressed on the red copper cylindrical rod pole (1) through the red copper bolt (2) and the copper gasket (3); The triangular pull ring (4) is fixedly connected with the copper gasket (3) and is located away from one end connected with the test line pressure wire nose (5) to facilitate the operation of the tester.

2. A circuit resistance test line terminal for a high voltage circuit breaker according to claim 1, characterized in that The red copper bolt (2) is screwed with the red copper cylindrical rod pole (1) after passing through the test line pressure wire nose (5) and the copper gasket (3), and the test line pressure wire nose (5) is tightly fixed on the red copper cylindrical rod pole (1).

3. A circuit resistance test line terminal for a high voltage circuit breaker according to claim 1, wherein The triangular pull ring (4) is an integral molding structure with the red copper cylindrical rod pole (1).

4. The circuit resistance test line terminal for high voltage circuit breakers of claim 1, wherein, The diameter of the red copper cylindrical rod pole (1) matches the inner diameter of the bundled pin contact, so that the red copper cylindrical rod pole (1) can be tightly inserted and kept in good contact during testing.

5. The circuit resistance test line terminal for high voltage circuit breakers of claim 1, wherein, The diameter of the copper gasket (3) is greater than the head diameter of the red copper bolt (2), so that the test line pressure wire nose (5) can be uniformly pressed on the red copper cylindrical rod pole (1).

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