Special test tool for low-voltage feeder line detection device
By designing a dedicated test fixture for low-voltage feeder testing devices, and adopting automated testing and multi-protocol support, the problem of existing testing tools relying on manual operation has been solved, achieving efficient and accurate LTU testing and broad compatibility.
Patent Information
- Application Number
- CN202520188155.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-07
- Publication Date
- 2026-02-10
- Estimated Expiration
- 2035-02-07
AI Technical Summary
Existing low-voltage feeder testing equipment relies on manual operation, which is time-consuming, error-prone, and produces inaccurate test results. Furthermore, it lacks compatibility and makes it difficult to comprehensively test LTUs from different manufacturers.
A dedicated test fixture for low-voltage feeder testing devices was designed. It adopts an automated testing process, integrates an eight-port serial server, supports multiple communication protocols, and communicates with the host computer through the serial server to achieve parallel testing of multiple LTUs.
It improves testing efficiency, ensures the accuracy and reliability of test results, and can fully cover the functional characteristics of LTU, including special functions and protocol conformance testing, while enhancing compatibility with equipment from different manufacturers.
Smart Images
Figure CN223897564U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of testing technology for low-voltage feeder testing devices, and in particular to a special testing fixture for low-voltage feeder testing devices. Background Technology
[0002] With the continuous development of smart grid technology, low-voltage feeder monitoring units (LTUs), as an important component of the power system, are of great significance for realizing the intelligent management of the power system. Currently, LTUs on the market are mainly used to monitor the status information of low-voltage branch feeders, such as parameters like current, voltage, and power, and upload this data to the master station system through communication networks, providing decision-making basis for grid dispatching and operation and maintenance.
[0003] Before an LTU is officially put into use, it needs to be tested to determine whether it meets the requirements. However, existing methods and technologies for testing LTUs have the following problems and shortcomings:
[0004] Currently, there is a lack of dedicated testing tools for testing LTUs on the market. Generally, general testing tools are used to test LTUs, which relies on manual operation, is time-consuming, and is prone to human error, resulting in inaccurate and unreliable test results. In addition, LTUs produced by different manufacturers have different communication protocols, and existing testing tools often only support a single standard or protocol, resulting in poor compatibility and difficulty in testing all functional characteristics of LTUs, especially in terms of testing capabilities for special functions and protocol consistency.
[0005] Therefore, this application provides a dedicated test fixture for a low-voltage feeder testing device to overcome the shortcomings of the prior art. Utility Model Content
[0006] The purpose of this invention is to solve the problems that existing testing tools rely heavily on manual labor, are time-consuming, prone to errors, and produce inaccurate and unreliable test results. Existing testing tools often only support a single standard or protocol, have poor compatibility, and are difficult to conduct comprehensive testing.
[0007] This utility model provides a dedicated testing fixture for a low-voltage feeder testing device, including a test box. The test box is connected to a host computer via a communication line. The test box includes a housing, with a switch and control button on the surface of the housing. Wiring terminals are provided on both sides of the housing. A power supply module is installed in the test box, which is connected to a serial port server. The serial port server is connected to a power source, which is connected to a CT box. The CT box is connected to a testing unit, which is connected to the wiring terminals. The wiring terminals are connected to the low-voltage feeder testing device (LTU) under test, thereby testing the low-voltage feeder testing device (LTU).
[0008] The serial port server is a one-to-eight serial port server, which can work with the host computer to communicate independently with the monitoring unit of each test position, greatly improving the detection efficiency.
[0009] The beneficial effects of the special testing fixture for a low-voltage feeder testing device provided by this utility model are:
[0010] By adopting an automated testing process, manual operations are reduced, test results can be automatically displayed, and a one-to-eight serial port server can be set up. By adopting an integrated testing approach, multiple LTUs can be tested in parallel at the same time, which greatly improves the speed and efficiency of testing.
[0011] Ensure that the test equipment can fully cover all functional characteristics of the LTU, including special functions and protocol conformance testing; support multiple communication protocols, and have interchangeable hardware interfaces to adapt to LTU testing from different manufacturers, thereby enhancing compatibility. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;
[0013] Figure 2 This is a schematic diagram of an embodiment of the present utility model.
[0014] The components include: 1. Test box; 11. Housing; 12. Switch; 13. Control button; 14. Test power module; 15. Serial server; 16. Power source; 17. CT box; 18. Test detection unit; 19. Wiring terminal; 2. Host computer. Detailed Implementation
[0015] To make the technical means, technical features, utility model purpose and technical effects of this utility model easy to understand, the present utility model will be further described below with reference to specific illustrations. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model. Example
[0016] like Figures 1 to 2As shown: A dedicated test fixture for a low-voltage feeder testing device includes a test box 1. The test box 1 is connected to a host computer 2 via a communication line. The test box 1 includes a housing 11. A switch 12 and a control button 13 are provided on the surface of the housing 11. Terminal blocks 19 are provided on both sides of the housing 11. A power supply module 14 is provided in the test box 1. The power supply module 14 is connected to a serial port server 15. The serial port server 15 is connected to a power source 16. The power source 16 is connected to a CT box 17. The CT box 17 is connected to a testing unit 18. The testing unit 18 is connected to the terminal blocks 19. The terminal blocks 19 are connected to the low-voltage feeder testing device (LTU) to be tested, thereby testing the low-voltage feeder testing device (LTU).
[0017] The power supply module 14 is a high-precision power supply module that generates 2.2V to provide a stable current for testing. The power source 16 serves as the source for calibration and measurement accuracy and is automatically controlled by the host computer 2 without human intervention. The CT box 17 is a 50-ratio CT box used to convert the large current output from the power source 16 into a small current input to the testing and monitoring unit 18 as a standard current source. The testing and monitoring unit 18 is used to perform topology monitoring on the signals generated by the device under test. The host computer 2 can communicate with each testing and monitoring unit 18 in sequence and read the topology monitoring records.
[0018] The serial port server 15 is a one-to-eight serial port server 15, which can cooperate with the host computer 2 and communicate independently with the testing and monitoring unit 18 of each test position, greatly improving the testing efficiency.
[0019] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the scope of the present utility model. All equivalent changes and modifications made in accordance with the content of the claims of the present utility model shall fall within the technical scope of the present utility model.
Claims
1. A dedicated testing fixture for a low-voltage feeder testing device, characterized in that: The test box (1) is connected to a host computer (2) via a communication line. The test box (1) includes a housing (11), a switch (12) and a control button (13) are provided on the surface of the housing (11), and wiring terminals (19) are provided on both sides of the housing (11). A power supply module (14) is provided in the test box (1), and a serial port server (15) is connected to the power supply module (14). The serial port server (15) is connected to a power source (16), and the power source (16) is connected to a CT box (17). The CT box (17) is connected to a testing unit (18), and the testing unit (18) is connected to the wiring terminals (19). The wiring terminals (19) are connected to a low-voltage feeder testing device to be tested.
2. The special test fixture for a low-voltage feeder testing device according to claim 1, characterized in that: The serial port server (15) is a one-to-eight serial port server.
3. The special test fixture for a low-voltage feeder testing device according to claim 2, characterized in that: The test box (1) is equipped with 8 wiring terminals (19).