Short circuit grounding fault indicator and indicating system
By employing digital indicators and cascaded architecture in the power system distribution network, the problem of inaccurate fault location in traditional fault indicator networking methods has been solved, enabling rich transmission and precise location of fault information.
Patent Information
- Application Number
- CN202520181874.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-05
- Publication Date
- 2026-02-27
- Estimated Expiration
- 2035-02-05
AI Technical Summary
In power system distribution networks, traditional fault indicator networking methods cannot provide rich fault indication information, resulting in inaccurate fault location.
Digital indicators are used to replace analog switch signals, and fault indicators are cascaded through sending and receiving network ports to form a cascaded network architecture, enabling rich transmission of fault information.
The richness of fault indication information has been improved, making fault location and cause investigation easier.
Smart Images
Figure CN223955781U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of fault indication, in particular to a short-circuit grounding fault indicator and indication system. BACKGROUND
[0002] In a power distribution network, such as a city ring network, if a line short-circuit fault or a grounding and leakage fault occurs in a branch circuit of a next-level power distribution network, a relay protection system of a previous level must be disconnected within a specified time. After the disconnection protection process occurs, all branch circuits belonging to the network of this level are powered off. Therefore, it is desirable to have a fault indicator that can quickly indicate the fault location.
[0003] It should be understood that when the number of power distribution cabinets that need to be subjected to fault detection is large, the fault indicators deployed at different power distribution cabinets need to be networked. In a conventional networking manner, different fault indicators rely on switch quantities to indicate whether a fault occurs. CONTENT OF THE UTILITY MODEL
[0004] The utility model aims at providing a short-circuit grounding fault indicator and indication system, which can make fault indication information more abundant and fault positioning more accurate.
[0005] The utility model provides the following scheme:
[0006] According to one aspect of the utility model, a short-circuit grounding fault indicator is provided, which comprises:
[0007] An indicator housing is internally provided with a PCB, and an RJ45 network port is welded on the PCB.
[0008] The sending network port and the receiving network port are respectively connected to the microcontroller.
[0009] The sending network port comprises an RJ45 network port, and the receiving network port comprises an RJ45 network port.
[0010] Optionally, the indicator housing is a rectangular housing.
[0011] Optionally, the rectangular housing comprises a front panel, a rear panel and a rectangular frame.
[0012] Optionally, the front panel is provided with a short-circuit fault indicator, a grounding fault indicator and a reset button.
[0013] Optionally, the short-circuit fault indicator comprises short-circuit fault indicators respectively belonging to different lines.
[0014] Optionally, the rear panel includes a short-circuit indicator selector knob and a ground fault enable switch.
[0015] Optionally, the transmit and receive network ports can be directly connected to the microcontroller via metal wires on the PCB.
[0016] Optionally, the transmitting network port and the receiving network port are connected to the signal conversion circuit, which is then connected to the microcontroller.
[0017] According to two aspects of this utility model, a short-circuit ground fault indication system is provided, the short-circuit ground fault indication system comprising:
[0018] The host computer, and multiple cascaded short-circuit ground fault indicators;
[0019] The short-circuit ground fault indicator is the short-circuit ground fault indicator as described above; and...
[0020] The multiple short-circuit ground fault indicators are cascaded with each other through transmitting network ports and receiving network ports.
[0021] The above solution achieves the following beneficial technical effects:
[0022] By using digital indicators to replace the original analog switching signals, and cascading different fault indicators, the indication information fed back to the host computer is richer, making it easier for technicians to locate and troubleshoot faults. Attached Figure Description
[0023] Figure 1 This is a circuit structure diagram of a short-circuit ground fault indicator provided in one or more embodiments of this utility model;
[0024] Figure 2 This is an internal circuit structure diagram of a short-circuit ground fault indicator provided in one or more embodiments of the present invention;
[0025] Figure 3 This is an internal circuit structure diagram of a short-circuit ground fault indicator provided in one or more embodiments of the present invention;
[0026] Figure 4 This is a front view of a short-circuit ground fault indicator provided in one or more embodiments of this utility model;
[0027] Figure 5 This is a rear view of a short-circuit ground fault indicator provided in one or more embodiments of the present invention;
[0028] Figure 6It is the left view of the short circuit grounding fault indicator provided by one or more embodiments of the utility model;
[0029] Figure 7 It is the right view of the short circuit grounding fault indicator provided by one or more embodiments of the utility model;
[0030] Figure 8 It is the top view of the short circuit grounding fault indicator provided by one or more embodiments of the utility model;
[0031] Figure 9 It is the bottom view of the short circuit grounding fault indicator provided by one or more embodiments of the utility model;
[0032] Figure 10 It is the PCB front wiring diagram of the short circuit grounding fault indicator provided by one or more embodiments of the utility model;
[0033] Figure 11 It is the PCB back wiring diagram of the short circuit grounding fault indicator provided by one or more embodiments of the utility model;
[0034] Figure 12 It is the network architecture diagram of the short circuit grounding fault indication system provided by one or more embodiments of the utility model.
[0035] Reference signs:
[0036] Sending network port 111, receiving network port 112, MCU 21, sending network interface 22, receiving network interface 23, MCU 31, signal conversion circuit 32, sending network interface 33, receiving network interface 34, front panel 41, short circuit fault indicator 411, grounding fault indicator 412, rear panel 42, short circuit indicator selection knob 421, grounding fault enable switch 422, rectangular frame body 43, PCB 44, sending network interface 441, receiving network interface 442, microcontroller 443. DETAILED DESCRIPTION
[0037] In order to make the purpose, technical scheme and advantages of the utility model more clear, the technical scheme of the utility model will be described clearly and completely below by combining the drawings in the embodiments of the utility model. The embodiments described in the application are only a part of the embodiments of the utility model, not all the embodiments. All other embodiments obtained by those skilled in the art without creative labor based on the spirit of the utility model belong to the protection scope of the utility model.
[0038] In the description of the utility model, need understanding is, the term "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and so on indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawing, just for the convenience of describing the utility model and simplifying the description, and not indicate or imply the device or element indicated must have a particular orientation, with a particular orientation configuration and operation, therefore can not be understood as the limitation of the utility model.
[0039] Figure 1 The logic structure diagram of the short-circuit grounding fault indicator is shown. Figure 1 The short-circuit grounding fault indicator 11 comprises: a sending network port 111, a receiving network port 112.
[0040] The sending network port 111 and the receiving network port 112 are both network ports of the short-circuit grounding fault indicator.
[0041] It should be noted that, whether it is the sending network port 111 or the receiving network port 112, it is an Ethernet network port.
[0042] The most simple, when the fault occurs, the fault information should at least indicate which network node the specific fault occurs.
[0043] After the network address of the fault node is determined, it is necessary to further determine what kind of fault occurs.
[0044] In summary, at any time, as long as the fault occurs, the fault information uploaded by the short-circuit grounding fault indicator is no longer a simple 0 or a simple 1.
[0045] The advantage of this is that the reported fault information is more comprehensive. After obtaining the fault information uploaded by the short-circuit grounding fault indicator, it can be known that which nodes in the current network have faults, and the type of the fault of the nodes can be further understood through the fault code. For example, which nodes have short-circuit faults and which nodes have grounding faults.
[0046] In addition, since the byte length of the fault code is longer, the fault code has strong representation ability and can represent more types of faults. This means that the types of faults represented by the fault code are not limited to short-circuit faults and grounding faults.
[0047] In addition, since each node, that is, each short-circuit grounding fault indicator is equipped with an independent sending network port 111 and an independent receiving network port 112, the network composed of different short-circuit grounding fault indicators is no longer a star network with a central point and multiple peripheral nodes. In addition to the star network, the short-circuit grounding fault indicator can also form other networks with different configurations. For the short-circuit grounding fault indicator claimed in the application, different short-circuit grounding fault indicators can be connected in cascade, and finally connected to the upper computer, that is, the original central node, to form a network with a cascade architecture.
[0048] Figure 2 An internal circuit structure of the short-circuit grounding fault indicator provided by one or more embodiments of the utility model is shown. Referring to Figure 2 , the short-circuit grounding fault indicator comprises an MCU 21, a sending network interface 22 and a receiving network interface 23. The sending network interface 22 and the receiving network interface 23 are both directly connected to the MCU 21. There is no direct connection between the sending network interface 22 and the receiving network interface 23.
[0049] Through the connection between the two network interfaces, the MCU 21 can directly control the transmission process of the fault information. Such transmission includes both the sending process of the fault information to other network nodes and the receiving process of the fault information from other network nodes.
[0050] In the internal circuit structure shown in Figure 2 , during the transmission process of the fault information, the related protocols of the Ethernet are directly used for the assembly and transmission of the related data packets. The advantage of this is that no related conversion of the transmission data is required before and after the transmission process.
[0051] Figure 3 Another internal circuit structure of the short-circuit grounding fault indicator provided by one or more embodiments of the utility model is shown. Referring to Figure 3The short-circuit ground fault indicator includes: MCU 31, signal conversion circuit 32, transmitting network interface 33, and receiving network interface 34.
[0052] As can be seen, with Figure 2 The difference between the short-circuit ground fault indicator shown is that it is composed of... Figure 3 The internal structure of the short-circuit ground fault indicator shown includes an additional signal conversion circuit 32. The function of signal conversion circuit 32 is to perform conversions between different network protocols. Most typically, signal conversion circuit 32 can convert between RS485 protocol and Ethernet protocol.
[0053] Figures 4 to 9 Six-view diagrams of a short-circuit ground fault indicator are shown. The main view shows the front panel 41 of the indicator. On the front panel 41, indicator lights 411 and 412 are arranged to indicate the fault.
[0054] The rear view mainly shows the rear panel 42 of the indicator. Configuration knobs 421 and 422 are provided on the rear panel 42.
[0055] Between the front panel 41 and the rear panel 42 is a rectangular frame 43. Inside the frame is a PCB 44. Various components are soldered onto the PCB 44. These components include two network interfaces 441 and 442, and a microcontroller 443 connected to them.
[0056] Figure 10 and Figure 11 The front and back wiring of the PCB 44, which is built into the rectangular frame 43, are shown respectively.
[0057] Figure 12 The network architecture of a short-circuit ground fault indication system provided by one or more embodiments of the present invention is illustrated. See also Figure 12 The entire system includes: a host computer 1201, and different short-circuit ground fault indicators 1202 cascaded in sequence with the host computer 1201.
[0058] exist Figure 12 In the network architecture shown, the different indicators 1202 are cascaded with each other. Therefore, when different indicators 1202 are networked together, the resulting network is no longer a simple star network, but a more complex network architecture.
[0059] Finally, it should be noted that: the above embodiments are used to illustrate the technical solutions of the present application, but not limited to them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.
Claims
1. A short-circuit ground fault indicator, characterized in that, The short-circuit ground fault indicator includes: An indicator housing, in which a PCB is built, and a transmit network port, a receive network port and a microcontroller are soldered on the PCB respectively; The transmitting network port and the receiving network port are respectively connected to the microcontroller; and The transmitting network port includes an RJ45 network port, and the receiving network port includes an RJ45 network port.
2. The short-circuit ground fault indicator according to claim 1, characterized in that, The indicator housing is rectangular.
3. The short-circuit ground fault indicator according to claim 2, characterized in that, The rectangular shell includes: a front panel, a rear panel, and a rectangular frame.
4. The short-circuit ground fault indicator according to claim 3, characterized in that, The front panel is equipped with: a short circuit fault indicator, a ground fault indicator, and a reset button.
5. The short-circuit ground fault indicator according to claim 4, characterized in that, The short circuit fault indicator lights include those belonging to different lines.
6. The short-circuit ground fault indicator according to claim 3, characterized in that, The rear panel features a short-circuit indicator selector knob and a ground fault enable switch.
7. The short-circuit ground fault indicator according to claim 1, characterized in that, The transmit and receive network ports are directly connected to the microcontroller via metal wires on the PCB.
8. The short-circuit ground fault indicator according to claim 1, characterized in that, The transmitting network port and the receiving network port are respectively connected to the signal conversion circuit, which is then connected to the microcontroller.
9. A short-circuit grounding fault indication system, characterized in that, The short-circuit ground fault indication system includes: The host computer, and multiple cascaded short-circuit ground fault indicators; The short-circuit ground fault indicator is the short-circuit ground fault indicator according to any one of claims 1 to 8; and... The multiple short-circuit ground fault indicators are cascaded with each other through transmitting network ports and receiving network ports.