Special secondary socket tool for vacuum circuit breaker switching characteristic test

Abstract

The invention discloses a special secondary socket tool for a switching characteristic test of a vacuum circuit breaker, and belongs to the technical field of detection tools, and the special secondary socket tool comprises a special secondary socket which is matched with and electrically connected with a secondary plug of the vacuum circuit breaker; the wiring panel is provided with a plurality of groups of test jacks; the internal wire group is used for electrically connecting the jacks of the special secondary socket with the corresponding test jacks on the wiring panel in a one-to-one manner; the special secondary socket comprises a shell, and a wiring panel and a lead group are integrated in the shell to form an independent test adapter unit; the special secondary socket is directly and accurately inserted into the secondary plug of the vacuum circuit breaker, the tedious and unreliable mode that in a traditional test, an original plug needs to be pulled out, and exposed contact pins need to be clamped one by one through a plurality of test clamps is replaced, and falling, short circuit or poor contact caused by vibration and accidental touch of the test clamps are avoided; therefore, the safety of the test process and the reliability of data acquisition are greatly improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of detection tools, and particularly relates to a special secondary socket tool for switch characteristic test of a vacuum circuit breaker. BACKGROUND

[0002] In the power system, the handcart type vacuum circuit breaker is the core control and protection equipment in the 10kV and 35kV power distribution area, and the reliability and accuracy of its action are directly related to the stable operation and power supply safety of the power grid. In order to ensure that its performance always meets the technical specifications, switch characteristic test must be carried out regularly according to relevant standards. The test aims to accurately measure a series of key dynamic parameters including opening time, closing time, three-phase synchronism, contact bounce time and travel characteristic. These parameters are not only an important basis for evaluating the mechanical characteristics of the circuit breaker, the state of the operating mechanism and the electrical life, but also a basis for predicting potential faults and arranging preventive maintenance. With the deepening of the concept of smart grid and condition-based maintenance, efficient and accurate characteristic test of switchgear has become an indispensable technical link in the daily operation and regular maintenance of the substation. The traditional test method relies on a general switch characteristic tester, and its basic technical path is to simulate or monitor the action signals by accessing the secondary control circuit of the circuit breaker, so as to complete parameter acquisition and analysis. Therefore, how to safely, reliably and quickly connect the tester with the secondary circuit of the measured circuit breaker is the first step to complete the whole test process, and is also the key to the test efficiency and data quality.

[0003] For a long time, the connection method commonly used in the field for the above test has significant drawbacks, which restricts the efficiency and safety of the test work. In the conventional operation, the standard secondary plug on the circuit breaker body is pulled out, and the multiple metal pins are exposed, then the test personnel use multiple independent test clamps (also known as "alligator clamps") to clamp on the corresponding pins one by one to lead out the closing coil, opening coil, auxiliary contact and other signals. This method exposes many problems in actual application: first, the connection reliability is poor. The contact between the test clamp and the cylindrical pin is point contact or line contact, the clamping force is limited and easily affected by external force, and it is easy to loosen, fall off or even short circuit adjacent pins due to accidental contact when the tester is placed, the personnel walk or slightly vibrate. This not only causes the test data to be interrupted and the waveform to be distorted, but also may damage the expensive tester or interfere with the secondary system due to the instantaneous short circuit current, which brings safety risks and economic losses. Second, the operation process is complicated and inefficient. Before each test, the staff must carefully check the pin number (core number) against the drawing, and perform "one-to-many" clamping. The process is time-consuming and labor-intensive, and when testing multiple circuit breakers in sequence in a substation, the whole process of "pulling out the plug, checking the drawing and clamping the test clamp" must be repeated for each test object, and a large amount of time is consumed in repetitive wiring work, resulting in low overall work efficiency.

[0004] Therefore, a dedicated secondary socket tool is needed for testing the switching characteristics of vacuum circuit breakers to solve the problems mentioned in the background art. Summary of the Invention

[0005] The purpose of this invention is to provide a dedicated secondary socket tool for testing the switching characteristics of vacuum circuit breakers, in order to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a dedicated secondary socket tool for testing the switching characteristics of a vacuum circuit breaker, comprising: a dedicated secondary socket for matching and electrically connecting with the secondary plug of the vacuum circuit breaker; a wiring panel with multiple sets of test sockets; and an internal wire group for electrically connecting each socket of the dedicated secondary socket to the corresponding test socket on the wiring panel one-to-one; the dedicated secondary socket includes a housing, and the wiring panel and the wire group are integrated within the housing to form an independent test adapter unit.

[0007] It should be noted in the solution that the socket layout, number and electrical definition of the dedicated secondary socket are completely matched with the secondary plug of the target model vacuum circuit breaker, and the number of its sockets covers all the pins on the secondary plug.

[0008] It is worth noting that the multiple test sockets on the wiring panel are arranged according to a preset marking rule and correspond one-to-one with the connection relationship of the internal wire group. The marking rule includes at least one of numbering, color code or symbol marking.

[0009] Furthermore, it should be noted that the internal wire assembly uses wires with insulated outer sheaths. The two ends of the wires are mechanically fastened and electrically connected to the rear end of the socket of the dedicated secondary socket and the wiring terminal of the test socket through crimp terminals, and wire number sleeves are sleeved near the connection points to identify the wire numbers.

[0010] In a preferred embodiment, the test socket is a universal standard test socket, and its model is compatible with the test lead plugs provided by conventional switch characteristic testers.

[0011] In a preferred embodiment, the housing is made of insulating material, and a cavity is formed inside to accommodate and fix the dedicated secondary socket, the wiring panel, and the internal wire assembly. The plug-in interface portion of the dedicated secondary socket and the test socket panel portion of the wiring panel are exposed outside the housing.

[0012] In a preferred embodiment, a handle is fixed to the outer casing.

[0013] In a preferred embodiment, the dedicated secondary socket is connected to the housing containing the wiring panel via a flexible cable, and the internal conductor group is arranged inside the cable.

[0014] Compared with the prior art, the special secondary socket tool for testing the switching characteristics of vacuum circuit breakers provided by the present invention has at least the following beneficial effects: The dedicated secondary socket allows for direct and precise connection to the secondary plug of the vacuum circuit breaker, replacing the cumbersome and unreliable traditional method of unplugging the original plug and manually clamping the exposed pins one by one with multiple test clips. The internal wiring harness acts as a standard, permanent "bridge," seamlessly and error-free guiding the circuit breaker's secondary circuit signal from the socket to the test socket on the wiring panel. Test personnel simply insert the universal tester's lead plug into the corresponding test socket on the panel to complete all electrical connections. Firstly, it completely eliminates the inherent instability of test clip connections. The plug-in connection has low contact resistance and reliable mechanical locking, preventing test clips from falling off, short-circuiting, or making poor contact due to vibration or accidental contact, greatly improving the safety of the testing process and the reliability of data acquisition, and protecting expensive testing equipment. Secondly, it achieves a "one-step" connection, reducing the preparation work that originally required minutes or even longer to identify the pin numbers and clamp them one by one to just a few seconds. A single person can easily operate it, significantly improving testing efficiency, especially when conducting batch testing of circuit breakers with multiple bays. Attached Figure Description

[0015] Figure 1 This is a top view of the overall structure of the present invention; Figure 2 This is a three-dimensional schematic diagram of the overall structure of the present invention. Figure One ; Figure 3 This is a three-dimensional schematic diagram of the overall structure of the present invention. Figure Two .

[0016] In the diagram: 1. Outer casing; 2. Dedicated secondary socket; 3. Wiring panel; 4. Test socket. Detailed Implementation

[0017] The present invention will be further described below with reference to embodiments.

[0018] Please see Figures 1-3This invention provides a dedicated secondary socket tool for testing the switching characteristics of vacuum circuit breakers, comprising: a dedicated secondary socket 2 for matching and electrically connecting to the secondary plug of the vacuum circuit breaker; a wiring panel 3 with multiple sets of test sockets 4; and an internal wire assembly for electrically connecting each socket of the dedicated secondary socket 2 to the corresponding test socket 4 on the wiring panel 3 one-to-one. The dedicated secondary socket 2 includes a housing 1, and the wiring panel 3 and the wire assembly are integrated within the housing 1, forming an independent test adapter unit. The dedicated secondary socket 2 is directly and accurately plugged into the secondary plug of the vacuum circuit breaker, replacing the cumbersome and unreliable method of unplugging the original plug and using multiple test clips to individually remove the exposed pins in traditional testing. The internal wire assembly acts as a standard, permanent "bridge," leading the signal of the circuit breaker's secondary circuit from the socket end to the test sockets 4 on the wiring panel 3 without interruption or error. The tester only needs to insert the lead plug of a general-purpose tester into the corresponding test socket 4 on the panel 3 to complete all electrical connections. Firstly, it completely eliminates the inherent instability of test clip connections. The plug-in connection features low contact resistance and reliable mechanical locking, preventing test clips from falling off, short-circuiting, or making poor contact due to vibration or accidental contact. This greatly improves the safety of the testing process and the reliability of data acquisition, protecting expensive testing instruments. Secondly, it achieves a "one-step" connection, reducing the preparation work that originally required several minutes or even longer to identify the pin numbers and clamp them one by one to just a few seconds. It can be easily operated by a single person, significantly improving testing efficiency, especially when conducting batch testing of circuit breakers in multiple bays.

[0019] It is worth further elaboration that the socket layout, quantity, and electrical definition of the dedicated secondary socket 2 are completely matched with the secondary plug of the target model vacuum circuit breaker, and its number of sockets covers all the pins on the secondary plug; the physical structure of the tool socket 2 (such as the hole arrangement, spacing, and locking mechanism) complements the pin structure of the original secondary plug of the circuit breaker, ensuring that the two can be connected as tightly and reliably as the original pair; the signals represented by the internal wires connected behind each socket (such as the closing coil, opening coil, auxiliary contacts, energy storage signals, etc.) strictly correspond to the secondary circuit diagram of the circuit breaker; firstly, this ensures that... With the highest compatibility and signal fidelity, the tool can be seamlessly connected to any circuit breaker that conforms to the standard of this model without any modifications. It can also completely extract all possible secondary circuit signals, providing a complete access point for various types of switch characteristic tests (such as opening / closing time, synchronicity, bounce, coil current waveform), meeting the comprehensive requirements of the test items. Secondly, since the connection is physically matched and the internal wiring is pre-fixed, test personnel do not need to consult drawings or identify core numbers on site, fundamentally eliminating the possibility of personal injury, equipment damage, or invalid test data that may be caused by misconnection of high voltage or incorrect connection of signal lines.

[0020] It is worth further elaborating that the multiple test sockets 4 on the wiring panel 3 are arranged according to a preset marking rule and correspond one-to-one with the connection relationship of the internal wire groups. The marking rule includes at least one of numbering, color coding, or symbol marking. Each test socket 4 on the panel 3 is uniquely connected to a specific socket of the dedicated secondary socket 2 through an internal wire, thereby corresponding to a specific secondary signal of the circuit breaker. Through the marking rules such as numbering, color coding, or symbols, this internally invisible electrical connection relationship is visually presented on the panel surface. This greatly simplifies the test wiring operation. Test personnel do not need to memorize complex correspondences. They only need to insert the corresponding lead of the tester into the socket clearly marked with "closing coil", "A phase auxiliary contact", etc., according to the panel markings. The operation is as intuitive as using a standard interface box, which lowers the technical threshold and reduces the reliance on skilled workers. At the same time, the clear markings avoid hesitation and verification time during wiring, further compressing non-test time and making the wiring error rate close to zero.

[0021] It is worth further elaboration that the internal wire assembly uses wires with insulated outer sheaths. The two ends of the wires are mechanically and electrically connected to the rear end of the socket of the dedicated secondary socket 2 and the terminal of the test socket 4 through crimp terminals. A wire number sleeve is sleeved near the connection point to identify the wire number. The insulated wires ensure that the signals are isolated from each other to prevent crosstalk. The crimp terminals are made by using special tools to firmly press the wire core to the metal terminal, forming a connection point that is more reliable, has lower resistance and is more vibration resistant than manual winding or welding. The connection points are fixed to the terminals of socket 2 and test socket 4 respectively. The wire number sleeve clearly identifies the identity of each wire in the wire harness, corresponding to the socket hole position and panel hole markings at both ends. The crimping process avoids poor soldering, corrosion and loosening, allows the tool to withstand frequent insertion and removal and handling, and ensures that the internal connection performance does not deteriorate over time and has a long service life.

[0022] It's worth further elaboration that test jack 4 is a universal standard test jack, compatible with the test lead plugs provided by conventional switch characteristic testers. These interfaces are fully compatible in physical size and electrical specifications with the test lead plugs included with mainstream switch characteristic testers from brands such as K and W, achieving seamless integration with the existing test equipment ecosystem. Users do not need to replace their testers or customize special leads to use this tool; they can directly use existing, familiar test leads, eliminating additional equipment modification costs and improving the tool's usability and acceptability. The standard jack makes connecting and disconnecting test leads very simple and quick, and the same tool can be used interchangeably with testers from different brands, increasing the tool's applicability.

[0023] Further details are worth noting: the outer casing 1 is made of insulating material, and its interior forms a cavity for accommodating and securing the dedicated secondary socket 2, wiring panel 3, and internal wiring assembly. The plug-in interface of the dedicated secondary socket 2 and the test socket 4 panel of the wiring panel 3 are exposed outside the outer casing 1. The insulating material of the outer casing 1 primarily ensures the user's personal safety, preventing accidental contact with live parts. The outer casing integrates and fixes the loose internal wiring, socket base, and panel base into a robust whole, resisting external impacts, drops, and daily wear. Simultaneously, the design exposes the interface sockets and panel sockets that require operation, facilitating easy access; it provides excellent physical protection and electrical insulation, ensuring the tool can operate safely and reliably in complex substation environments where oil, dust, and impacts may occur, extending its service life. A fully enclosed outer casing makes the tool easy to hold, carry, and store, while protecting the delicate internal connections, preventing disconnection or errors due to pulling or squeezing of the internal wiring harness. This is a key mechanical structure for maintaining the long-term reliability of the tool.

[0024] It is worth further elaborating that a handle is fixed on the outer casing 1; by adding a handle to the outer casing 1, a clear and comfortable point of force is provided for the user's hand, and the handle makes it more convenient and easier to move the tool between multiple test intervals.

[0025] It is worth further elaboration that the dedicated secondary socket 2 is connected to the housing 1 containing the wiring panel 3 via a flexible cable, with the internal wire group laid inside the cable. The corresponding internal wires are encapsulated inside the cable. When the space in front of the circuit breaker cabinet is very small and cannot accommodate a large housing with an integrated panel, only the small socket 2 needs to be inserted, and the heavy panel can be placed outside the cabinet for easy wiring and observation. At the same time, the flexible cable can absorb some of the torque from the pulling of the test leads or the weight of the tool body, reducing the lateral load on the circuit breaker secondary socket interface, which is more friendly for long-term use.

[0026] In summary: Direct and precise connection to the secondary plug of the vacuum circuit breaker via the dedicated secondary socket 2 replaces the cumbersome and unreliable traditional method of unplugging the original plug and using multiple test clips to individually remove exposed pins. The internal wiring harness acts as a standard, permanent "bridge," seamlessly and error-free guiding the circuit breaker's secondary circuit signal from the socket to the test socket 4 on the wiring panel 3. Test personnel simply insert the universal tester's lead plug into the corresponding test socket 4 on panel 3 to complete all electrical connections. Firstly, it completely eliminates the inherent instability of test clip connections. The plug-in connection has low contact resistance and reliable mechanical locking, preventing test clips from falling off, short-circuiting, or making poor contact due to vibration or accidental contact, greatly improving the safety of the testing process and the reliability of data acquisition, and protecting expensive testing instruments. Secondly, it achieves "one-step connection", reducing the preparation work that originally required several minutes or even longer to identify the core number and clamp one by one to a few seconds. It can be easily operated by a single person, which significantly improves the testing efficiency. Its advantages are particularly prominent when conducting batch testing of circuit breakers in multiple bays.

Claims

1. A special secondary socket tool for testing the switching characteristics of vacuum circuit breakers, characterized in that, include: A dedicated secondary socket (2) for matching and electrically connecting with the secondary plug of a vacuum circuit breaker; a wiring panel (3) having multiple test sockets (4); and an internal wire group for electrically connecting each socket of the dedicated secondary socket (2) to the corresponding test socket (4) on the wiring panel (3) one-to-one; the dedicated secondary socket (2) includes a housing (1), and the wiring panel (3) and the wire group are integrated inside the housing (1) to form an independent test adapter unit.

2. The special secondary socket tool for testing the switching characteristics of vacuum circuit breakers according to claim 1, characterized in that, The socket layout, number and electrical definition of the dedicated secondary socket (2) are completely matched with the secondary plug of the target model vacuum circuit breaker, and its number of sockets covers all the pins on the secondary plug.

3. The special secondary socket tool for testing the switching characteristics of vacuum circuit breakers according to claim 2, characterized in that, The multiple test sockets (4) on the wiring panel (3) are arranged according to a preset identification rule and correspond one-to-one with the connection relationship of the internal wire group. The identification rule includes at least one of numbering, color code or symbol marking.

4. The special secondary socket tool for testing the switching characteristics of vacuum circuit breakers according to claim 3, characterized in that, The internal conductor group uses conductors with insulated outer sheaths. The two ends of the conductors are mechanically fastened and electrically connected to the rear end of the socket of the dedicated secondary socket (2) and the wiring terminal of the test socket (4) through crimp terminals, and a wire number sleeve is provided near the connection point to identify the conductor number.

5. The special secondary socket tool for testing the switching characteristics of a vacuum circuit breaker according to claim 1, characterized in that, The test socket (4) is a general standard test socket, and its model is compatible with the test lead plugs provided by conventional switch characteristic testers.

6. The special secondary socket tool for testing the switching characteristics of a vacuum circuit breaker according to claim 5, characterized in that, The housing (1) is made of insulating material and has a cavity inside for accommodating and fixing the dedicated secondary socket (2), the wiring panel (3) and the internal wire assembly. The plug-in interface portion of the dedicated secondary socket (2) and the test socket (4) panel portion of the wiring panel (3) are exposed outside the housing (1).

7. The special secondary socket tool for testing the switching characteristics of a vacuum circuit breaker according to claim 6, characterized in that, A handle is fixed on the outer shell (1).

8. The special secondary socket tool for testing the switching characteristics of a vacuum circuit breaker according to claim 1, characterized in that, The dedicated secondary socket (2) is connected to the housing (1) containing the wiring panel (3) via a flexible cable, and the internal wire group is arranged inside the cable.

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