High-voltage switch auxiliary loop test switching device

Abstract

The utility model relates to the technical field of switching devices, in particular to a high-voltage switch auxiliary loop test switching device, which comprises a wiring node, and the wiring node comprises an input point and an output point. The output points are matched with the branch number of the to-be-tested switch auxiliary loop, and are used for the access of auxiliary contacts corresponding to the branch number of the to-be-tested switch auxiliary loop; the relay matrix is used for connection between the input point and the output point; the power supply is used for supplying power to the actuation of the relay matrix and the communication control terminal interface; the communication control terminal interface is used for accessing a communication control terminal to control actuation and release of the relay; the input point is used for completing the test of the auxiliary loop according to a signal detection unit which needs to be accessed by the test; the number of the input points is multiple, the multiple input points are connected, and each input point is correspondingly connected with the multiple output points. The device provided by the utility model has the advantages of time saving, high efficiency and intellectualization during testing.

Description

Technical Field

[0001] This utility model relates to the field of switching device technology, specifically a high-voltage switch auxiliary circuit test switching device. Background Technology

[0002] High-voltage switches and auxiliary switches play a crucial role in power systems. They are primarily used to control and protect high-voltage switches, ensuring the safe and stable operation of the power system. Auxiliary switches provide additional protection during high-voltage switch operation, preventing overload and short-circuit faults, thereby reducing equipment damage and the risk of power outages.

[0003] Testing high-voltage switches and auxiliary switches is essential because it verifies the performance and reliability of the equipment. Through testing, it ensures that auxiliary switches function properly in actual operation, protecting high-voltage switches from damage. Furthermore, testing can identify potential problems with the equipment, providing a basis for improvement and optimization, thereby enhancing the overall safety and reliability of the power system.

[0004] Because different high-voltage switches and auxiliary switches have different functions, or different test sources are required for different tests, the switching process of high-voltage switches and auxiliary switches is troublesome due to the large number of lines, and the need for repeated wiring. The existing method is to manually switch the lines by reading the diagram, which is time-consuming and labor-intensive, and there is a risk of incorrect wiring or replacement, which can lead to problems such as product burnout. Utility Model Content

[0005] The purpose of this invention is to provide a high-voltage switch auxiliary circuit test switching device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A high-voltage switch auxiliary circuit test switching device, comprising:

[0008] Wiring nodes, wherein the wiring nodes include input points and output points;

[0009] The output point is matched with the number of auxiliary circuit branches of the switch under test, and is used to connect the auxiliary contacts corresponding to the number of auxiliary circuit branches of the switch under test.

[0010] A relay matrix, used for connecting input points and output points;

[0011] Power supply, which is used to supply power for the activation of the relay matrix and the communication control terminal interface;

[0012] The communication control terminal interface is used to access the communication control terminal to control the activation and deactivation of the relay.

[0013] The input point is used to complete the auxiliary circuit test according to the signal detection unit required for the test;

[0014] There are several input points, and all input points are connected. Each input point is connected to several output points.

[0015] Furthermore, there are 8 input points, and each input point has 8 output points.

[0016] Furthermore, the relay uses two 8A relay coils connected in parallel, so that when a certain input point is activated, the two relays activate simultaneously to shunt the current.

[0017] Furthermore, the power supply is a 24V power supply composed of a voltage regulator chip and a filter circuit.

[0018] Furthermore, the communication control terminal interface adopts MODBUS control.

[0019] Furthermore, the switch under test includes a high-voltage switch and an auxiliary switch.

[0020] Furthermore, the input and output points are provided by the ports of the PCB matrix, and both the input and output terminals of the relay matrix are connected to the PCB matrix.

[0021] Furthermore, the signal detection unit required for the test is an auxiliary contact resistance tester or a coil resistance tester.

[0022] Compared with the prior art, the beneficial effects of this utility model are:

[0023] This invention addresses the issue of auxiliary circuits in high-voltage switches, which typically have up to 64 lines. Different test lines are required for different tests, resulting in time-consuming, inefficient, and error-prone manual switching. The switching device of this invention directly connects all auxiliary circuit branches of the high-voltage switch to the device's subsequent test lines, which are then connected to the corresponding 64 output points. The eight input test signal detection units, such as auxiliary contact resistance testers or coil resistance testers, are connected at the points. During the test, the required lines are connected according to the standard 485 communication protocol. Each set of eight lines is connected to one terminal to prevent visual fatigue caused by excessive wiring, simplifying the wiring process and achieving time-saving, high-efficiency, and intelligent operation. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall architecture of this utility model.

[0025] Figure 2 This is a schematic diagram showing the connection between the relay matrix and the input and output points of this utility model.

[0026] Figure 3 This is a schematic diagram illustrating the working principle of this utility model.

[0027] Figure 4 The diagram shows the connection between the communication control terminal interface and the power supply of this utility model and the pluggable terminal.

[0028] Figure 5 This is a schematic diagram showing the connection between the 64 output points and the signal detection unit of this utility model.

[0029] Figure 6 This is a layout diagram of the wiring nodes of the device of this utility model. Detailed Implementation

[0030] 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.

[0031] In the description of this utility model, it should be noted that the terms "upper end," "lower end," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0032] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0033] Please see Figures 1 to 6 This utility model provides a technical solution:

[0034] A high-voltage switch auxiliary circuit test switching device is provided to support various tests of the high-voltage switch auxiliary circuit. The switching device includes a relay matrix, a power supply system, and a communication system.

[0035] Wiring nodes: used to connect to the auxiliary circuit branch of the switch under test and the relay matrix;

[0036] Relay matrix: consists of an array of 8 relay boards; each relay board contains 64 relays for auxiliary point switching at 8 locations;

[0037] Power supply system: It is a 24V power supply used to provide power for relay activation and communication.

[0038] Communication system: used to control the engagement and disengagement of relays to achieve automatic switching; the communication system is a communication control terminal interface, which serves as a standard control port for other control terminals to intervene in the control.

[0039] The following is a detailed introduction:

[0040] Switching device 1-64 output points (referred to as output points, K1-K64 in 2 and 5 in the figure): supports the access of up to 64 auxiliary contacts, which matches the maximum number of auxiliary circuit branches of mainstream high voltage switches (and auxiliary switches).

[0041] The relay matrix consists of 512 relays and a corresponding PCB matrix, and the connections between input and output points can be freely combined.

[0042] 24V power supply: such as Figure 4 As shown, it is composed of a voltage regulator chip and a filter circuit to supply power to the relay output and communication control.

[0043] Switching device 1-8 input points (hereinafter referred to as input points): Signal detection units that can be freely connected according to the test requirements to complete the test of the auxiliary circuit.

[0044] In this invention, the switch to be tested is a high-voltage switch or an auxiliary switch.

[0045] like Figure 2 As shown, the input points include IN1-IN8, and the output points include OUT1-OUT8. A relay array consisting of 8 relay boards forms one switching device; the 8 IN input points total 64 OUT output points; the input points IN1-IN8 of the 8 relay boards are all connected, so there are only 8 input points in total, but each relay board has 8 output points OUT1-OUT8, corresponding to 64 output points.

[0046] The device includes output points: supporting up to 64 auxiliary contact connections, matching the maximum number of auxiliary circuit branches in mainstream high-voltage switches. The PCB matrix uses pluggable terminals for easy wiring and replacement, with 8 wires per terminal to prevent visual fatigue from excessive wiring.

[0047] Relay Matrix: Internally composed of 512 relays and corresponding PCB matrix, the connection between input and output points can be freely combined; the relays adopt the parallel connection of two 8A relay coils. When a certain control point is activated, the two relays are activated at the same time, which can achieve the purpose of current shunting, thereby reducing the overcurrent of the relays and shortening their lifespan. When one relay fails, the other relay can still maintain normal operation, reducing the failure rate of the equipment.

[0048] Specifically, two 8A relay coils are connected in parallel by connecting to the 2EDGKM-5.08-8PZ straight pin plug-in terminal.

[0049] 24V power supply: Composed of a voltage regulator chip and a filter circuit, used to supply power to the relay output and communication control.

[0050] Output point: Other devices or modules can be freely connected as needed for the experiment (i.e., ... Figure 1 The signal detection unit is used to complete the test of the auxiliary circuit.

[0051] Figure 2 The figures shown correspond to input points 1-8. Figure 3 As shown, 1-128 correspond to 64 output points connected in parallel from the relay (equipped with a PCB matrix), thus achieving a free combination of 64 points to 8 pins.

[0052] The detection data of the auxiliary contacts of the high-voltage switch auxiliary circuit using the switching device of this utility model are described in Table 1 below:

[0053] Bit address definition Data Description 0000H D01 Relay output for channel 1: =1 indicates activation, =0 indicates deactivation. 0001H D02 Second relay output: =1 for activation, =00 for deactivation. 0002H D03 3rd relay output: =1 is activated, =00 is deactivated. … … … 003FH D064 Output of relay channel 64: =1 for activation, =0 for deactivation.

[0054] Table 1

[0055] The product's functions and uses are illustrated using two tests of the auxiliary circuit as examples.

[0056] High-voltage switch auxiliary circuit auxiliary contact detection:

[0057] The status of the main contacts of a high-voltage switch can be detected by checking the corresponding contacts in the auxiliary circuit. Various tests involve detecting the continuity of auxiliary contacts, but the positions and states of these contacts vary between different switches. Therefore, different signal lines are typically connected to a signal detection unit for testing. For example, when auxiliary signal lines 1 and 2 of a high-voltage switch are connected, the switch is in the closed state; when lines 3 and 4 are connected, the switch is in the energy storage state. During testing, 24V is typically applied to line 1, and a voltage sensor is connected to line 2. If voltage is detected at line 2, the switch is considered closed. Similarly, 24V is applied to line 3, and a signal sensor is connected to line 4. If 24V is detected, the switch is in the energy storage state. This process requires continuous line switching for testing. However, if… Figure 3 As shown, all auxiliary lines of high-voltage switches 1-64 are connected to the switching device. Line output terminal 1 is connected to 24V, and terminal 2 is connected to signal acquisition. At this point, by controlling contactor 1 to connect to output terminal 1 and contactor 2 to connect to the output terminal via 485 communication, the signal status can be measured. Then, by controlling input 3 to connect to output 1 and input 4 to connect to output 2, the second pair of signals can be measured. Since it is a standard MODBUS control, this type of procedure can be completed by existing programs, achieving rapid switching without complex manual programming. The device greatly shortens the connection and switching time and significantly improves detection efficiency. Generally, high-voltage switches often have a dozen or so auxiliary contacts and twenty or so wires; this can save more than half an hour of time.

[0058] Taking the operation test of a high-voltage switch as an example:

[0059] The operation test of a high-voltage switch requires energizing the corresponding auxiliary circuit to achieve electric control. 04 and 14 are the closing coils, 30 and 31 are the opening coils, and 25 and 35 are the energy storage coils. A complete energizing operation involves first energizing both ends of the energy storage coil; then energizing the closing coil; and finally energizing the opening coil after closing to achieve a normal operation. This wiring definition typically differs for different switches, and the entire operation cycle needs to be repeated thousands of times. Existing control methods often use PLCs, but this requires switching the circuit each time. After connecting this switching device, the output points remain the same, connected in the order of 1-64. Input points 1-6 are connected to the corresponding test power supplies for closing, opening, and energy storage, respectively. The mechanical break-in operation of the circuit breaker can be completed by sending cyclic commands through a standard MODBUS communication tool.

[0060] The parts of this utility model not described are existing technologies.

[0061] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high voltage switch auxiliary circuit test switching device, characterized by, Comprise: A wiring junction, comprising an input point and an output point; The output point matches the number of auxiliary circuit branches of the switch under test, and is used for the access of the auxiliary contact corresponding to the number of auxiliary circuit branches of the switch under test; A relay matrix for connection between the input point and the output point; A power supply for supplying power to the relay matrix and the communication control terminal interface; The communication control terminal interface is used for the access of the communication control terminal to the relay control attraction and release; The input point is used to access the signal detection unit required for the test to complete the test of the auxiliary circuit; The input point has several, and several input points are connected, and each input point corresponds to several mutual output points.

2. A high voltage switch auxiliary circuit test switching device as claimed in claim 1, characterized in that The input point has 8, and each input point has 8 output points.

3. A high voltage switch auxiliary circuit test switching device as claimed in claim 1, characterized in that The relay adopts the parallel mode of two 8A relay coils, and two relays are attracted at the same time when a certain point is controlled to be attracted for shunt.

4. A high voltage switch auxiliary circuit test switching device as claimed in claim 1, characterized in that The power supply is a 24V power supply composed of voltage stabilizing chip and filter circuit.

5. A high voltage switch auxiliary circuit test switching device as recited in claim 1, wherein, The communication control terminal interface adopts MODBUS control.

6. A high voltage switch auxiliary circuit test switching device as claimed in claim 1, characterized in that The switch under test is a high-voltage switch or an auxiliary switch.

7. A high voltage switch auxiliary circuit test switching device as recited in claim 1, wherein, The input point and the output point are provided by the port of the PCB matrix, and the input end and the output end of the relay matrix are connected with the PCB matrix.

8. A high voltage switch auxiliary circuit test switching device as claimed in claim 1, characterized in that The signal detection unit required for the test is an auxiliary contact resistance tester or a coil resistance tester.

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