A direct current fast breaker current measurement device
Patent Information
- Application Number
- CN202522435728.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-17
- Publication Date
- 2026-10-16
- Estimated Expiration
- 2035-11-17
AI Technical Summary
[0003]在直流快速断路器置的生产中需要不断地进行测试在不同工况下的电流值，为断路器的保护功能提供更准确的电流数据，提升保护性能，但是直流快速断路器置造型多样，其测量装置也多为专用，拆装耗费时间长，同时传统测量装置多采用分流器与模拟信号调理方案，测量精度低，工况适配性差，对此，针对该技术问题，本申请提出一种直流快速断路器电流测量装置
1、本实用新型中，该测量装置通过固定组件可以将分段式霍尔传感器直接套设在需要测量的主线上，并通过线箍固定位置，防止测量时移动，单人即可操作，使用方便。
Smart Images
Figure CN224861682U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of measurement technology, and in particular to a DC fast circuit breaker current measuring device. Background Technology
[0002] DC fast circuit breakers are protective switches specifically designed for DC circuits. Their main function is to quickly interrupt current when a circuit fault occurs or maintenance is required, preventing equipment damage or safety accidents. Because DC current, unlike AC current, does not have a natural zero-crossing point, ordinary circuit breakers cannot effectively extinguish arcs. Therefore, DC fast circuit breakers employ a special design to forcibly interrupt current. They are widely used in DC systems such as photovoltaic power generation and electric vehicle charging stations, and are key equipment for ensuring the safe operation of DC circuits.
[0003] In the production of DC fast circuit breakers, it is necessary to continuously test the current values under different operating conditions to provide more accurate current data for the protection function of the circuit breaker and improve its protection performance. However, DC fast circuit breakers have various shapes and their measuring devices are mostly specialized, which takes a long time to disassemble and assemble. At the same time, traditional measuring devices mostly use shunts and analog signal conditioning schemes, resulting in low measurement accuracy and poor adaptability to operating conditions. In view of this technical problem, this application proposes a DC fast circuit breaker current measuring device. Utility Model Content
[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a DC fast circuit breaker current measuring device. This measuring device is compatible with most DC fast circuit breakers and employs Hall sensors and signal processing algorithms to accurately measure the current value of the circuit breaker under different operating conditions.
[0005] To achieve the above objectives, the present invention provides the following technical solution: A DC fast circuit breaker current measuring device includes a circuit breaker device. A switch is disposed at the center of the top side of the circuit breaker device. A signal processor is disposed on the outer wall of the circuit breaker device. The inner wall of the signal processor is connected to the circuit breaker device via a snap-fit assembly. Two connection ports are disposed on the front side of the signal processor. A data transmission interface is disposed on the rear side of the signal processor. A main line is installed on the front side of the circuit breaker device. A housing is disposed on the outer wall of the main line. A rotating shaft is fixedly connected to the bottom outer wall of the housing. A second housing is rotatably connected to the outer wall of the rotating shaft. The second housing is connected to the first housing via a fixing assembly. Protective shells are installed on the inner walls of both the first and second housings. A coil is installed on the inner wall of the protective shell. A Hall sensor is disposed on the outer wall of the coil.
[0006] Furthermore, the latching assembly includes a slider that is slidably connected to the inner wall of the signal processor, springs are provided on both sides of the slider, a locking block is fixedly connected to the outer wall of the slider, and the inner side of the locking block is connected to the circuit breaker.
[0007] Furthermore, one end of the spring is connected to the slider, and the other end of the spring is connected to the signal processor.
[0008] Furthermore, the fixing component includes a limiting plate fixedly connected to the inner wall of the second outer shell, a locking block is provided on the inner wall of the limiting plate, and the outer wall of the locking block is connected to the first outer shell.
[0009] Furthermore, a connecting strip is fixedly connected to the outer walls of the first and second outer shells, a wire clamp is fixedly connected to the outer wall of the connecting strip, a screw is threadedly connected to the inner wall of the wire clamp, and the inner wall of the wire clamp is connected to the main line.
[0010] Furthermore, the outer wall of the outer casing is provided with a second connection port, and the outer wall of the second connection port is connected to one of the first connection ports via a connecting line.
[0011] Furthermore, a display screen is mounted on the top of the signal processor, and a fixing plate is fixedly connected to the top of the housing.
[0012] This utility model has the following beneficial effects: 1. In this utility model, the measuring device can directly mount the segmented Hall sensor onto the main line to be measured through a fixing component, and fix its position with a wire clamp to prevent movement during measurement. It can be operated by a single person and is convenient to use.
[0013] 2. In this utility model, the measuring device can fix the signal processor to the outer wall of the circuit breaker through the snap-fit assembly, and adopts a modular design, which makes it convenient to replace parts during later maintenance and further improves the installation adaptability. Attached Figure Description
[0014] Figure 1 This is a perspective view of a DC fast circuit breaker current measuring device proposed in this utility model; Figure 2 This invention provides a snap-fit assembly diagram of a DC fast circuit breaker current measuring device. Figure 3 This is a diagram of the fixed assembly of a DC fast circuit breaker current measuring device proposed in this utility model; Figure 4 This is an internal structural diagram of a DC fast circuit breaker current measuring device proposed in this utility model.
[0015] Legend: 1. Circuit breaker; 2. Switch; 3. Signal processor; 4. Display screen; 5. Connection port one; 6. Data transmission interface; 7. Locking block; 8. Main line; 9. Outer shell one; 10. Outer shell two; 11. Fixing plate; 12. Cable clamp; 13. Slider; 14. Spring; 15. Connecting strip; 16. Screw; 17. Shaft; 18. Connection port two; 19. Locking block; 20. Limiting plate; 21. Protective shell; 22. Coil; 23. Hall sensor. Detailed Implementation
[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0017] Reference Figures 1-3 This utility model provides an embodiment of a DC fast circuit breaker current measuring device, including a circuit breaker 1, a switch 2 disposed at the top center of the circuit breaker 1, a signal processor 3 disposed on the outer wall of the circuit breaker 1, the inner wall of the signal processor 3 being connected to the circuit breaker 1 via a snap-fit assembly, two connection ports 5 disposed on the front side of the signal processor 3, a data transmission interface 6 disposed on the rear side of the signal processor 3, a main line 8 installed on the front side of the circuit breaker 1, a housing 9 disposed on the outer wall of the main line 8, a rotating shaft 17 fixedly connected to the bottom outer wall of the housing 9, a second housing 10 rotatably connected to the outer wall of the rotating shaft 17, the second housing 10 being connected to the first housing 9 via a fixing assembly, a protective shell 21 disposed on the inner wall of both the first housing 9 and the second housing 10, a coil 22 disposed on the inner wall of the protective shell 21, and a Hall sensor 23 disposed on the outer wall of the coil 22.
[0018] Specifically, the signal processor 3 is fixed to the outer wall of the circuit breaker 1 using a snap-fit assembly. The signal processor 3 has a built-in operating condition identification module, which analyzes the current change rate and duration in real time through FPGA to ensure that the circuit breaker protection action is based on the actual fault current. The outer casing 9 and the outer casing 10 are unlocked using the fixing assembly, and then opened and fitted onto the main line 8 via the pivot 17. The connection is then connected to the connection port 5 via a connecting cable, and can be connected to a computer or other devices via the data transmission interface 6. The current value can be measured by the Hall sensor 23 and coil 22 inside the protective shell 21 built into the outer casing 9 and the outer casing 10. The inner wall of the protective shell 21 is provided with a shielding coating to avoid radiation interference measurement. The result is then fed back to the signal processor 3 via the connecting cable. After being processed by the signal processor 3, the data is transmitted to the computer to obtain accurate values.
[0019] Reference Figures 2-4The latching assembly includes a slider 13 slidably connected to the inner wall of the signal processor 3. Springs 14 are provided on both sides of the slider 13. A latching block 7 is fixedly connected to the outer wall of the slider 13. The inner side of the latching block 7 is connected to the circuit breaker 1. One end of the spring 14 is connected to the slider 13, and the other end of the spring 14 is connected to the signal processor 3. When the latching block 7 is pulled outward, the latching block 7 causes the slider 13 to slide and unfold on the inner wall of the signal processor 3. After it is fixed to the outer shell of the circuit breaker 1, the latching block 7 is released, and the spring 14 pushes the slider 13 to reset, thereby causing the latching block 7 to be fixed to the outer wall of the circuit breaker 1.
[0020] The fixing component includes a limiting plate 20 fixedly connected to the inner wall of the second outer shell 10. The inner wall of the limiting plate 20 is provided with a locking block 19. The outer wall of the locking block 19 is connected to the first outer shell 9. When unlocking, the locking block 19 is rotated so that the limiting block on the locking block 19 is aligned with the through slot opened on the limiting plate 20. Then the locking block 19 is pulled out to unlock the first outer shell 9, so that the second outer shell 10 can be opened through the rotating shaft 17.
[0021] A connecting strip 15 is fixedly connected to the outer walls of outer shell 9 and outer shell 10. A wire clamp 12 is fixedly connected to the outer wall of the connecting strip 15. A screw 16 is threadedly connected to the inner wall of the wire clamp 12. The inner wall of the wire clamp 12 is connected to the main line 8. The wire clamp 12 is fixed to the outer walls of outer shell 9 and outer shell 10 through the connecting strip 15. Then, the opening, closing and locking of the wire clamp 12 can be adjusted by the screw 16, so as to facilitate fixing it to the outer wall of the main line 8.
[0022] The outer wall of the outer casing 9 is provided with a connection port 2 18. The outer wall of the connection port 2 18 is connected to one of the connection ports 1 5 through a connecting line. Measurement data can be transmitted through the connection port.
[0023] The signal processor 3 has a display screen 4 mounted on top, and the housing 9 has a fixing plate 11 fixedly connected to the top. The display screen 4 can display the measured values, and the fixing plate 11 can fix the housing to the mounting box of the circuit breaker 1.
[0024] Working principle: Pull out the locking block 7 on the bottom side of the signal processor 3. The locking block 7 drives the slider 13 to slide and unfold on the inner wall of the signal processor 3. After being fixed to the outer shell of the circuit breaker 1, release the locking block 7. The spring 14 pushes the slider 13 to reset, thereby fixing the locking block 7 to the outer wall of the circuit breaker 1. Rotate the locking block 19 so that the limit block on the locking block 19 is aligned with the through slot opened on the limit plate 20. Then pull out the locking block 19 to unlock the outer shell 9, so that the outer shell 10 can be opened through the rotating shaft 17. Then it is sleeved on the main line 8 and then closed and inserted for locking. Block 19 is fixed, and the opening and locking of the wire clamp 12 can be adjusted by screw 16, thereby fixing it to the outer wall of the main line 8. It is connected to the connection port 5 through the connecting wire, and can be connected to a computer and other devices through the data transmission interface 6. The Hall sensor 23 and coil 22 inside the protective shell 21 of the outer shell 1 9 and the inner protective shell 21 can measure the current value, and then feed it back to the signal processor 3 through the connecting wire. The display screen 4 of the signal processor 3 can display the measurement number. At the same time, after being processed by the signal processor 3, it is transmitted to the computer to obtain the measured numerical data.
[0025] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A DC fast circuit breaker current measuring device, characterized in that: The circuit includes a circuit breaker (1), a switch (2) is provided in the middle of the top side of the circuit breaker (1), a signal processor (3) is provided on the outer wall of the circuit breaker (1), the inner wall of the signal processor (3) is connected to the circuit breaker (1) through a snap-fit assembly, two connection ports (5) are provided on the front side of the signal processor (3), a data transmission interface (6) is provided on the rear side of the signal processor (3), a main line (8) is installed on the front side of the circuit breaker (1), a housing (9) is provided on the outer wall of the main line (8), a rotating shaft (17) is fixedly connected to the bottom outer wall of the housing (9), a second housing (10) is rotatably connected to the outer wall of the rotating shaft (17), the second housing (10) is connected to the first housing (9) through a fixing assembly, a protective shell (21) is installed on the inner wall of both the first housing (9) and the second housing (10), a coil (22) is installed on the inner wall of the protective shell (21), and a Hall sensor (23) is provided on the outer wall of the coil (22).
2. The DC fast circuit breaker current measuring device according to claim 1, characterized in that: The latching assembly includes a slider (13) that is slidably connected to the inner wall of the signal processor (3). Springs (14) are provided on both sides of the slider (13). A locking block (7) is fixedly connected to the outer wall of the slider (13). The inner side of the locking block (7) is connected to the circuit breaker (1).
3. The DC fast circuit breaker current measuring device according to claim 2, characterized in that: One end of the spring (14) is connected to the slider (13), and the other end of the spring (14) is connected to the signal processor (3).
4. The DC fast circuit breaker current measuring device according to claim 1, characterized in that: The fixing component includes a limiting plate (20) fixedly connected to the inner wall of the second outer shell (10), and a locking block (19) is provided on the inner wall of the limiting plate (20). The outer wall of the locking block (19) is connected to the first outer shell (9).
5. The DC fast circuit breaker current measuring device according to claim 1, characterized in that: The outer walls of the first outer shell (9) and the second outer shell (10) are fixedly connected with connecting strips (15), and the outer walls of the connecting strips (15) are fixedly connected with wire clamps (12). The inner walls of the wire clamps (12) are threaded with screws (16), and the inner walls of the wire clamps (12) are connected to the main line (8).
6. The DC fast circuit breaker current measuring device according to claim 1, characterized in that: The outer wall of the outer shell 1 (9) is provided with a connection port 2 (18), and the outer wall of the connection port 2 (18) is connected to one of the connection ports 1 (5) by a connecting line.
7. The DC fast circuit breaker current measuring device according to claim 1, characterized in that: The signal processor (3) is equipped with a display screen (4) on top, and the housing (9) is fixedly connected to a fixing plate (11) on top.