Simulation test device and method for low-voltage automatic switching loop device

Abstract

The invention belongs to the technical field of circuit change-over switch testing, and particularly discloses a simulation test device and method for a low-voltage automatic switching loop device, and the device comprises a test operation platform which is provided with a simulation display unit; the analog display unit is used for displaying a working signal and a control signal of the low-voltage automatic switching loop device; the low-voltage circuit breaker simulation unit is used for generating a control signal, and the control signal is used for changing the working state of the low-voltage automatic switching loop device; the interactive interface unit comprises an input port and an output port; the input port is connected with the low-voltage automatic switching loop device; the output port is connected with the low-voltage automatic switching loop device; the device has the advantages that full-function testing of the low-voltage automatic switching loop device in a non-working site is allowed, cost and complexity are reduced, and power failure requirements are reduced. The simulation unit generates a control signal, simulates the equipment performance carefully, and improves the efficiency of field installation and maintenance.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit transfer switch testing, and in particular to a simulation testing device and method for a low-voltage self-closing ring device. Background Art

[0002] At present, with the continuous development of intelligent power grids and the continuous application of intelligent equipment in power grids, especially the installation and use of 400V low-voltage automatic closing ring devices in newly built low-voltage distribution rooms, as well as the renovation and installation of old distribution rooms, the maintenance and operation of energized equipment in low-voltage power grids have been greatly improved, laying a solid material foundation for uninterrupted power supply; however, the control logic of the 400V low-voltage automatic closing ring device is complex and the judgment conditions are harsh. At present, it is impossible to complete the full function test at the construction site of the newly installed distribution room, and the renovation and installation of the old distribution room requires a long power outage.

[0003] Therefore, a simulation test device and method for a low-pressure self-closing ring device are proposed to solve the above-mentioned problems. Summary of the invention

[0004] The present invention aims to provide a simulation test device and method for a low-pressure self-closing ring device, so as to solve or improve at least one of the above-mentioned technical problems.

[0005] In view of this, a first aspect of the present invention is to provide a simulation test device for a low-pressure self-closing ring device.

[0006] A second aspect of the present invention is to provide a method.

[0007] The first aspect of the present invention provides a simulation test device for a low-voltage self-closing ring device, comprising: a test console, on which a simulation display unit corresponding to the low-voltage self-closing ring device is formed; the simulation display unit is used to display the working signal and control signal of the low-voltage self-closing ring device; a low-voltage circuit breaker simulation unit, used to generate the control signal, and the control signal is used to change the working state of the low-voltage self-closing ring device; the low-voltage circuit breaker simulation unit is respectively connected to the test console and the interactive interface unit to transmit the control signal; the interactive interface unit includes an input port and an output port; the input port is connected to the low-voltage self-closing ring device to obtain the working signal and input the control signal into the low-voltage self-closing ring device; the output port is connected to the low-voltage self-closing ring device to supply power during simulation.

[0008] In any of the above technical solutions, the low-voltage self-closing ring device includes a first circuit breaker, a second circuit breaker and a self-closing ring switch connected by a three-phase circuit, and the self-closing ring switch is located between the first circuit breaker and the second circuit breaker; and the working state includes the closing and opening states of the first circuit breaker, the second circuit breaker and the self-closing ring switch.

[0009] In any of the above technical solutions, the input port includes a current interface connected to at least one point on the three-phase circuit and a voltage interface connected to the three-phase circuit and the neutral circuit on the low-voltage self-closing ring device; and the working signal includes a voltage signal detected by the voltage interface and a current signal detected by the current interface, and the closing and opening status is represented by the current signal.

[0010] In any of the above technical solutions, the analog display unit includes a first indicator light module for displaying the closing and opening status and the voltage signal and a second indicator light module for displaying the control signal; the first indicator light module and the second indicator light module are independent of each other.

[0011] In any of the above technical solutions, the low-voltage circuit breaker simulation unit includes a control circuit, which is respectively connected to the first circuit breaker, the second circuit breaker and the automatic closing loop switch; the control circuit includes: a closing module, which is respectively connected in series with the first circuit breaker, the second circuit breaker and the automatic closing loop switch, and is used to input a closing signal; an opening module, which is respectively connected in parallel with the first circuit breaker, the second circuit breaker and the automatic closing loop switch, and is used to input an opening signal.

[0012] In any of the above technical solutions, the closing and opening states include an automatic closing state and a manual closing state; and the closing module includes a first submodule and a second submodule connected in parallel; the first submodule simulates the automatic closing state by inputting the closing signal; the second submodule is connected to the manual closing switch of the first circuit breaker, the second circuit breaker and the automatic closing loop switch, and simulates the manual closing state by inputting the closing signal.

[0013] In any of the above technical solutions, the closing and opening states also include an automatic opening state and a manual opening state; and the opening module includes a third submodule and a fourth submodule connected in parallel with each other; the third submodule simulates the automatic opening state by inputting the opening signal; the fourth submodule is connected to the manual opening switch of the first circuit breaker, the second circuit breaker and the self-closing ring switch, and simulates the manual opening state by inputting the opening signal.

[0014] In any of the above technical solutions, the closing signal and the opening signal constitute the control signal; and there are the following situations: situation one, the first circuit breaker or the second circuit breaker and the automatic closing ring switch respectively switch between the automatic closing state and the automatic opening state to simulate the automatic and automatic restoration working condition or remote control switching working condition of the low-voltage automatic closing ring device; situation two, the first circuit breaker or the second circuit breaker and the automatic closing ring switch respectively switch between the automatic closing state and the manual opening state to simulate the automatic and manual restoration working condition of the low-voltage automatic closing ring device; situation three, the first circuit breaker or the second circuit breaker and the automatic closing ring switch respectively switch between the manual closing state and the manual opening state to simulate the manual switching working condition of the low-voltage automatic closing ring device; situation four, the automatic closing ring switch switches between the manual closing state and the manual opening state to simulate the closing and selecting tripping working condition of the low-voltage automatic closing ring device.

[0015] In any of the above technical solutions, the control circuit is connected between one phase circuit in the three-phase circuit and the neutral circuit.

[0016] The second aspect of the present invention provides a method implemented by a simulation test device in any of the above-mentioned technical solutions, comprising the following steps: connecting the low-voltage self-closing ring device to the simulation test device through the interactive interface unit; controlling the low-voltage circuit breaker simulation unit to generate the control signal through the test console, and transmitting the control signal to the low-voltage self-closing ring device; adjusting the low-voltage self-closing ring device to the corresponding working state according to different control signals; judging whether the working state corresponds to the working signal, and judging it as qualified if it corresponds, and judging it as unqualified if it does not correspond.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The test bench and low-voltage circuit breaker simulation unit allow full-function testing of low-voltage self-closing ring devices to be performed off-site. This eliminates the need to bring the device to the actual working environment for testing, reducing testing costs and complexity. By completing comprehensive testing off-site, the need for on-site testing is reduced, especially the power outage time that may be required during on-site testing, which helps maintain the normal operation of the power system.

[0019] The low voltage circuit breaker simulation unit can generate various control signals, allowing detailed simulation and testing of different working conditions of the low voltage automatic closing ring device. This provides an in-depth understanding of the performance of the equipment. The equipment configuration and status determined by the simulation test can be directly applied to the actual installation and maintenance operations, improving the efficiency and accuracy of on-site work.

[0020] Additional aspects and advantages of embodiments according to the present invention will become apparent in the following description or may be learned through practice of embodiments according to the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0022] Figure 1 It is a schematic diagram of the structure of the test operation table of the present invention;

[0023] Figure 2 It is a schematic diagram of the input port structure of the present invention;

[0024] Figure 3 It is a schematic diagram of the output port structure of the present invention;

[0025] Figure 4 It is a structural schematic diagram of the low-pressure self-closing ring device of the present invention;

[0026] Figure 5 It is a schematic diagram of the control circuit and its connection structure of the present invention;

[0027] Figure 6 The circuit diagram of the circuit breaker interlocking control of the present invention;

[0028] Figure 7 It is a schematic diagram of the self-starting and self-restoring working process of the present invention;

[0029] Figure 8 It is a schematic diagram of the self-pitching hand recovery process of the present invention;

[0030] Fig. 9 It is a schematic diagram of the manual switching working process of the present invention;

[0031] Fig.10 It is a schematic diagram of the remote control switching working process of the present invention;

[0032] Fig.11 It is a schematic diagram of the loop closing and tripping working condition process of the present invention;

[0033] Fig.12 It is a roadmap of the method steps of the present invention. DETAILED DESCRIPTION

[0034] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0035] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0036] See also Figure 1-Figure 12 , the following describes a simulation test device and method for a low-pressure self-closing ring device according to some embodiments of the present invention.

[0037] The embodiment of the first aspect of the present invention provides a simulation test device for a low-pressure self-closing ring device. In some embodiments of the present invention, such as Figure 1-Figure 6 As shown, the simulation test device includes:

[0038] A test operating table is formed with an analog display unit corresponding to the low-voltage self-closing ring device; the analog display unit is used to display the working signal and control signal of the low-voltage self-closing ring device.

[0039] The low-voltage circuit breaker simulation unit is used to generate a control signal, and the control signal is used to change the working state of the low-voltage self-closing ring device; the low-voltage circuit breaker simulation unit is respectively connected to the test console and the interactive interface unit to transmit the control signal.

[0040] The interactive interface unit includes an input port and an output port; the input port is connected to the low-voltage self-closing ring device to obtain the working signal and input the control signal into the low-voltage self-closing ring device; the output port is connected to the low-voltage self-closing ring device to supply power during simulation.

[0041] The present invention provides a simulation test device for a low-voltage self-closing ring device. The test console is the central control and interactive interface of the test device and is equipped with advanced computing and display technology. The simulation display unit on the console displays real-time working signals and control signals. These signals simulate the performance of the self-closing ring device under different power supply states and load conditions. The display unit is designed to display all key parameters of the self-closing ring device in real time, including voltage, current, frequency and any fault or warning signals. The unit may include a touch screen function, allowing operators to interactively simulate various operating scenarios, such as power failure, load changes, etc.

[0042] The test console simulates the response of the low-voltage automatic closing loop device under various grid conditions through built-in software and hardware. This includes main power failure, backup power startup, etc. The simulation display unit displays these events in a graphical interface, allowing operators to intuitively understand the performance of the equipment under various conditions; the test device can generate control signals to test the control logic and execution components of the automatic closing loop device. For example, a power failure signal can be simulated to observe whether the automatic closing loop device can automatically switch to the backup power supply; the test of the control signal helps to confirm whether the control system of the device works as expected and whether it can respond quickly and accurately to various grid conditions; the test console will record the performance data of the automatic closing loop device in the simulation test, including response time, fault recovery capability and load handling capability. These data are crucial to evaluating the reliability and stability of the equipment, and can also be used to formulate maintenance plans and improvement measures.

[0043] The advanced computing module in the test console generates simulation signals and control commands according to the preset test scripts. These commands are sent to the self-closing ring device through the connection interface. The response of the equipment is fed back to the test console through the sensor and displayed in real time by the display unit. This instant feedback mechanism makes the testing and debugging process efficient and intuitive.

[0044] The low-voltage circuit breaker simulation unit is responsible for generating simulated circuit breaker control signals. These signals simulate the behavior of a real-world circuit breaker when it receives an opening or closing command, such as closing (closing the circuit) and opening (opening the circuit); by issuing a closing or opening signal, the simulation unit can actually change the working state of the low-voltage self-closing ring device and simulate the response of the device under power failure or other specific conditions; the simulation unit is directly connected to the test console and receives specific test commands and parameters from the console; at the same time, the simulation unit is also connected to the interactive interface unit, which may include manual control devices, display screens or other user interaction devices for real-time monitoring and adjustment of the test process.

[0045] The test console sends electrical test commands to the low-voltage circuit breaker simulation unit, such as the specific circuit breaker operation to be simulated; the simulation unit receives and processes these commands to determine the type of control signal to be generated (closing or opening); once the type of operation is determined, the simulation unit generates the corresponding electrical signal. These signals are transmitted to the low-voltage self-closing ring device through the connecting line, triggering the device to change its working state; at the same time, these control signals are also sent to the interactive interface unit, allowing the operator to monitor the operation being performed and the response of the device; the response of the low-voltage self-closing ring device to the simulated control signal (such as whether the power switching is successful or not) will be fed back to the simulation unit through the system, and further transmitted to the test console and the interactive interface unit. The operator can see the test results and the current status of the device in real time through the interactive interface unit to ensure that adjustments can be made quickly or possible test abnormalities can be responded to.

[0046] The input port is responsible for receiving working signals from the low-voltage automatic closing ring device, including status signals such as voltage, current, and frequency. These signals reflect the real-time working status of the device. At the same time, the input port is also used to send control signals to the low-voltage automatic closing ring device. Control signals such as start, stop, fault reset, etc. are used to control the device to operate according to preset test parameters. The output port is responsible for providing the necessary power to the low-voltage automatic closing ring device for operation during the test. The output port may also output test data and results for further analysis and recording.

[0047] The interactive interface unit receives various working signals sent by the self-closing ring device through its input port. These signals are converted into usable data after internal processing for display and analysis by the operating console. At the same time, the input port receives control commands from the test operating console. These commands are processed by the unit and sent to the self-closing ring device in the form of control signals to guide the device to enter a specific working mode or perform specific operations. The output port of the interactive interface unit not only provides the power required for the simulation test to the low-voltage self-closing ring device, but also manages the quality and stability of the power to ensure that the test conditions are consistent with the actual application environment. During the test process, the continuity and stability of the power supply are crucial, especially when performing power switching and fault response tests. In addition to power output, the output port is also responsible for sending the data generated during the test back to the test operating console or data recording system. These data include but are not limited to response time, fault records, performance evaluation, etc. This information helps to evaluate the performance of the device, identify potential problems and improve product design.

[0048] In summary, the simulation test device is small and portable. By using the connector to connect the various components, it is easy to disassemble and can quickly replace the low-voltage self-closing ring device to be tested, shortening the centralized testing time; it can avoid the inconvenience caused by the acceptance link in the process of renovating old equipment on site. Through centralized and large-scale testing in the early stage, it can be verified that the low-voltage self-closing ring device to be installed is in good function, eliminating the power outage transmission test during the on-site installation process; the low-voltage self-closing ring device can be simulated and installed before construction, and the wiring position of the work site can be familiarized in advance, shortening the working time during the renovation and installation process, improving the installation efficiency of the work site, and also improving the installation reliability.

[0049] Specifically, Figure 1 As shown, the test bench includes:

[0050] Control unit: The control unit is the main part of the test console. It is responsible for generating and sending control signals to the low-voltage circuit breaker simulation unit and the automatic closing ring switch. The control unit usually includes one or more microprocessors, related software and a user interface, allowing the operator to input instructions, adjust parameters and monitor the test process.

[0051] User interface: The user interface enables operators to interactively control the test process, usually including display screens, buttons, switches, and indicator lights. These interface elements provide intuitive operation and real-time feedback. The user interface can also display test data and system status to help operators make accurate judgments and adjustments.

[0052] Communication interface: The test console includes interfaces for communicating with the low-voltage self-closing ring device and other test equipment, such as Ethernet ports, serial ports or wireless connections, through which the control unit can send control signals and receive feedback signals from the equipment.

[0053] The test console usually has a data recording function, which can record all key parameters and events during the test. The console may also include data analysis tools to help evaluate the performance and status of the equipment and confirm whether the test results are qualified or not; the low-voltage circuit breaker simulation unit is used to simulate the behavior of the low-voltage circuit breaker in the actual power grid and generate control signals representing different working states. The unit receives signals from the test console and simulates the closing or opening states of the circuit breaker based on these signals; the automatic closing ring switch (445) simulates the behavior of the automatic closing ring switch in the power grid in the test environment, especially in the automatic and manual closing and opening operations, receives control signals from the test console, and switches its operating state according to these signals to test its performance and response. Other test equipment (such as current and voltage measurement equipment) is used to measure and monitor the electrical parameters of the low-voltage automatic closing ring device during the test process, such as current, voltage, etc. These measurement results are fed back to the test console to provide a basis for the determination of the test results.

[0054] In any of the above embodiments, the low-voltage self-closing ring device includes a first circuit breaker, a second circuit breaker and a self-closing ring switch connected through a three-phase circuit, and the self-closing ring switch is located between the first circuit breaker and the second circuit breaker.

[0055] The working state includes the closing and opening states of the first circuit breaker, the second circuit breaker and the automatic closing ring switch.

[0056] In this embodiment, the first circuit breaker is connected to the main power source, usually a public power grid or a main power supply system, and is responsible for controlling the power supply from the main power source to the facility; the second circuit breaker is connected to a backup power source, such as a generator set or an uninterruptible power supply (UPS), to provide power supply when the main power source fails; the automatic closing loop switch is located between the first circuit breaker and the second circuit breaker, automatically or manually controlling the switching between the two circuit breakers to ensure the continuity of power supply.

[0057] Under normal circumstances, the first circuit breaker is closed, power is supplied to the facility from the main power supply, the second circuit breaker is in the open state, and the backup power supply is in standby state; when the main power supply fails (such as voltage drop, frequency abnormality, etc.), the automatic reclosing ring switch automatically detects the fault, and the switch instructs the first circuit breaker to open (disconnect the main power supply), and at the same time instructs the second circuit breaker to close to connect the power supply from the backup power supply; the automatic reclosing ring switch usually has an automatic operation mode, which can complete the power switching without human intervention, and can also be operated manually, allowing the operator to control the power switching under specific circumstances, such as when performing power system maintenance or testing; the system is usually equipped with a status monitoring function to monitor the closing and opening status of the two circuit breakers and the automatic reclosing ring switch in real time. The monitoring data can be visualized through the control system and can also be checked through the remote monitoring system to ensure the normal operation of the system.

[0058] Specifically, Figure 4 As shown, the low-pressure self-closing ring device consists of:

[0059] Circuit breaker 401 and circuit breaker 402: These two circuit breakers control two different power lines respectively. Their main function is to control the flow of current, protect the circuit from damage due to overload or short circuit, and disconnect the power supply when necessary to ensure the safety of the system. The circuit breaker can be operated manually or automatically. Automatic operation allows the power supply to be automatically disconnected when circuit abnormalities are detected, while manual operation allows the operator to control as needed.

[0060] Automatic closing loop switch 445: This switch is used to automatically switch between two power sources to ensure the continuity of power supply. When the main power source fails, it can automatically switch to the backup power source, thereby maintaining the power supply without human intervention; when necessary, the automatic closing loop switch can close the two power sources, allowing both power sources to supply power at the same time, increasing the reliability of power supply; in specific circumstances, such as testing or maintenance, the automatic closing loop switch can also perform a selective trip operation to selectively disconnect one power source without affecting the power supply of the other power source.

[0061] Power connection: The wiring connection in the figure shows the paths from the three-phase power supply (marked as N, A, B, C) to the two circuit breakers. These paths ensure that the power can be safely and efficiently transmitted to the required equipment. Each circuit breaker and self-closing ring switch has its corresponding input and output lines to ensure that it can receive power from the power supply and transmit it to downstream equipment.

[0062] In any of the above embodiments, the input port includes a current interface connected to at least one point on the three-phase circuit and a voltage interface connected to the three-phase circuit and a neutral circuit on the low-voltage self-closing ring device.

[0063] The working signal includes a voltage signal detected by a voltage interface and a current signal detected by a current interface, and the closing and opening states are represented by current signals.

[0064] In this embodiment, the current interface is connected to at least one point of the three-phase circuit to measure the current value of each phase. These current values ​​reflect the operating conditions of the power load and the circuit. The current signal can be used to characterize the closing and opening state, that is, to determine whether the circuit breaker is closed (closed) or open (open) by detecting the presence or change of the current; the voltage interface is connected to the neutral line on the three-phase circuit and the low-voltage automatic closing ring device to monitor the voltage level. The voltage signal is a key indicator for judging the state of the power system, including voltage stability and phase balance. The signal detected by the voltage interface can be used to analyze the overall performance and safety of the power system.

[0065] When the current passes through the current interface, the sensor (such as a current transformer) captures the current signal and converts it into data for further processing. These data reflect the current load and possible anomalies of each phase. Similarly, the voltage interface continuously monitors the voltage level by connecting to the neutral line and each phase line. Voltage sensors such as voltage transformers or voltage dividers ensure accurate measurement and safe conversion of signals; the measured current and voltage data are transmitted to the control unit of the simulation test device. Here, the data is analyzed to determine the working status of the device, such as detecting whether there are problems such as overload, short circuit or power imbalance. The control unit also analyzes the current signal to confirm the closing and opening status of the circuit breaker. The sudden change or interruption of the current can determine whether the circuit breaker is operating correctly; based on the data analysis results, the simulation test device can adjust the test parameters or issue an alarm. For example, if a current anomaly is detected, the system may automatically adjust the load or simulate the circuit breaker action to test the response of the device. The test results and status information can be displayed to the operator through the user interface, enabling them to monitor the test process in real time and make necessary adjustments.

[0066] Specifically, Figure 2 As shown, the input ports and components are:

[0067] The current measurement points are as follows:

[0068] Ia1+ / -, Ib1+ / -, Ic1+ / -: These are the inputs and outputs for measuring the first three-phase current. Each measurement point has positive and negative terminals for connecting current sensors;

[0069] Ia2+ / -, Ib2+ / -, Ic2+ / -: the second set of three-phase current measurement points;

[0070] Ia3+ / -, Ib3+ / -, Ic3+ / -: The third group of three-phase current measurement points.

[0071] The voltage measurement points are as follows:

[0072] Ua1, Ub1, Uc1: represent the first group of voltage measurement points of phase A, phase B and phase C of three-phase electricity respectively;

[0073] Ua2, Ub2, Uc2: the second group of three-phase voltage measurement points;

[0074] Un1, Un2: Indicates the voltage measurement points of the neutral line, used to monitor the voltage related to the neutral line.

[0075] As mentioned above, these measurement points provide direct readings of the voltage and current of each phase in the power system, allowing technicians to monitor the real-time operating status and performance of the system; by analyzing the data obtained from these points, imbalances, overloads or other potential problems in the system can be identified, helping with fault diagnosis and preventive maintenance; during the equipment configuration and testing phase, these measurement points can be used to set equipment parameters, verify system design and perform load tests.

[0076] Specifically, Figure 2 As shown, the output ports and components are:

[0077] The diagram shows three vertical columns, labeled "Channel 1," "Channel 2," and "Power." The circular symbols at the top of each column may represent connection points or status indicators.

[0078] Channel 1# and Channel 2#: These channels may be designed to output specific test signals or control commands to the low-voltage automatic closing loop device. They may correspond to specific test scenarios or equipment operations, such as closing and opening tests or performance tests under specific conditions. Each channel may independently control a group of devices or circuits, allowing accurate simulation and testing of different power grid environments and conditions.

[0079] Power Supply: The Power Supply section is the main power connection that provides power to the test system and connected equipment. This includes providing the required voltage and current for the test station itself and all connected test equipment, and may include a safety disconnect function in case of an electrical fault during testing.

[0080] In any of the above embodiments, the analog display unit includes a first indicator light module for displaying the closing and opening states and the voltage signal and a second indicator light module for displaying the control signal.

[0081] The first indicator light module and the second indicator light module are independent of each other.

[0082] In this embodiment, the first indicator light module is used to display the closing and opening status and voltage signals, and includes a group of indicator lights, each indicator light corresponds to a different state: closing (closed), opening (open), and normal or abnormal voltage state. This module enables the operator to quickly identify the current state of the circuit breaker and whether the voltage is within the normal operating range; the second indicator light module is specifically used to display control signals, such as start, stop, fault reset, etc., and includes multi-color indicator lights, each color or flashing mode corresponds to a specific control command or system response, which allows the operator to intuitively see which control signals are activated or are affecting the system.

[0083] The simulation test device collects data related to the closing and opening status, voltage and control signals through its sensors and interfaces. These data are sent to the central processing unit for necessary analysis and logical processing. According to the processed data, the first indicator light module will display the closing and opening status and voltage level through lights of different colors or modes. For example, green may indicate normal voltage, and red may indicate abnormal voltage; a stable light indicates a closed state, and a flashing light indicates an open state. The second indicator light module responds to the control signal and reflects the currently executed command through a specific color or flashing mode. For example, blue may indicate that the system is starting, and yellow may indicate that a fault reset is in progress. By observing the status of these two indicator light modules, the operator can monitor the test progress and the response of the equipment in real time. This instant visual feedback helps to adjust test parameters, diagnose problems or verify system functions.

[0084] The first and second indicator modules in the analog display unit greatly enhance the operator's control and understanding of the test status of the low-voltage self-closing ring device by providing clear and intuitive visual feedback. The independence of these modules ensures clear distinction of information, reduces the possibility of operating errors, and improves the efficiency and safety of test operations. Through this efficient visualization method, the analog test device not only improves the accuracy of equipment testing, but also optimizes the operating experience and response speed.

[0085] In any of the above embodiments, the low voltage circuit breaker simulation unit includes a control circuit, which is connected to the first circuit breaker, the second circuit breaker and the self-closing ring switch respectively; the control circuit includes:

[0086] The closing module is connected in series with the first circuit breaker, the second circuit breaker and the automatic closing loop switch, and is used to input a closing signal.

[0087] The opening module is respectively connected in parallel with the first circuit breaker, the second circuit breaker and the automatic closing loop switch, and is used for inputting an opening signal.

[0088] In this embodiment, the closing module is located in the control circuit and is connected in series with the first circuit breaker, the second circuit breaker and the automatic closing loop switch. Its main function is to input a closing signal to these circuit breakers and switches, that is, to command them to close, complete the circuit connection, and allow current to flow. The closing signal is usually used to start normal power supply or simulate power switching and other scenarios during testing; the opening module is connected in parallel with the first circuit breaker, the second circuit breaker and the automatic closing loop switch. Its main function is to input an opening signal to these devices, that is, to command them to disconnect, cut off the circuit, and prevent current from flowing. The opening signal is used to safely cut off power or simulate power failures and other emergency power outages during testing.

[0089] The closing and opening modules inside the control circuit generate corresponding control signals by receiving instructions from the test console. These signals are directly transmitted to the corresponding circuit breakers and switches through the control lines to trigger their operation; the operation logic of the closing and opening modules is based on the preset test script or the real-time input of the operator, and the response status (closing or opening) of the circuit breaker and switch is fed back to the test console, allowing the response performance of the equipment to be monitored and recorded; the control circuit is designed with multiple safety measures to ensure that no misoperation or failure occurs during the closing or opening process. The monitoring system tracks the status of the control signal and the response of the circuit breaker / switch in real time to ensure the safety and accuracy of the test process.

[0090] The closing and opening modules of the low voltage circuit breaker simulation unit are part of the simulation test device, which ensures that the operation of circuit breakers and automatic closing ring switches in the actual power system can be accurately simulated. This precise control capability is the key to effective testing and ensuring the reliability of the power system, especially when it is necessary to verify the equipment's ability to respond to power outages and faults. Through such simulation tests, the quality and efficiency of the design, installation and maintenance of power equipment can be greatly improved.

[0091] Specifically, Figure 5 As shown, the control circuit consists of:

[0092] Low voltage circuit breakers (401 and 402):

[0093] ZH1, ZH2, ZH3 (main closing indication): indicates the main closing status of each circuit breaker;

[0094] SH1, SH2, SH3 (manual closing indication): used to display the state of the circuit breaker being closed by manual operation;

[0095] ZF1, ZF2, ZF3 (main opening indication): indicates the main opening status of the respective circuit breakers;

[0096] SF1, SF2, SF3 (manual opening indication): used to display the status of the circuit breaker being opened by manual operation.

[0097] The function of these circuit breakers is to control the connection and disconnection of power supply and protect the circuit safety. They can perform closing and opening actions according to control signals or manual operations.

[0098] Self-closing ring switch (445):

[0099] JF1, JF2, JF3 (closing and opening interfaces): represent the operating interfaces of the self-closing ring switch, responsible for switching between circuit breakers 401 and 402 to ensure the continuous supply of power or to isolate the faulty power supply when a fault is detected.

[0100] The function of the self-closing loop switch 445 is to automatically switch between different power sources to maintain a stable power supply, especially to be able to seamlessly switch to another power source when one power source fails.

[0101] Current and voltage indication:

[0102] H1, H2, H3 (current indication): Displays the current passing through each circuit breaker, used to monitor load conditions and possible overload problems;

[0103] V1, V2, V3 (voltage indication): Displays the voltage across each circuit breaker to ensure that the voltage is within a safe range.

[0104] The connection and disconnection of the circuit is controlled through closing and opening operations, while the current and voltage are monitored to ensure the safe operation of the circuit; the operator is allowed to choose to use automatic or manual mode for closing or opening according to system requirements and on-site conditions; in automatic mode, if power or load abnormalities are detected, the system can automatically switch power or disconnect power to prevent the spread of faults; through detailed status indications, the operator can clearly understand the working status of each component and the health of the entire system.

[0105] Specifically, Figure 6 The circuit diagram of the circuit breaker interlocking control is as follows:

[0106] J11, J21, and J31 are normally closed nodes and open after being energized. Figure 6 L1 and LOCK correspondence Figure 5 For example, when all three switches are not closed, the L1 to LOCK circuit is connected. When the incoming line switch 1 is closed manually or automatically, the closing circuit is connected. Figure 5 The J11 relay is energized. Figure 6 The two J11 nodes are opened, and then Figure 5401 nodes remain Figure 5 The J11 relay is always powered. Figure 6 L1 to LOCK is still conducting. If the two incoming line switches are closed later, the principle is the same as just described. Figure 6 The two J21 nodes are opened. At this time, L1 to LOCK is not conductive. At this time, if you want to close the third switch, you cannot close it manually or automatically because L1 to LOCK is not conductive.

[0107] From the above, it can be seen that if you want to have this locking function on the actual device, connect the switch control power supply to the L1 terminal at (L1-LOCK). If you do not want to have this locking function, just connect it to another L1.

[0108] In any of the above embodiments, the closing and opening states include an automatic closing state and a manual closing state; and the closing module includes a first submodule and a second submodule connected in parallel.

[0109] The first submodule simulates the automatic closing state by inputting the closing signal.

[0110] The second submodule is connected to the first circuit breaker, the second circuit breaker and the manual closing switch of the automatic closing loop switch, and simulates the manual closing state by inputting the closing signal.

[0111] In this embodiment, the first submodule (automatic closing) is mainly responsible for simulating the automatic closing state, which is usually automatically triggered when the system detects that the main power supply has returned to normal. The automatic closing function is used to test whether the device can automatically close the circuit breaker after the power supply is restored, thereby restoring the power supply without human intervention; the second submodule (manual closing) is responsible for simulating the manual closing operation, and is connected to the manual closing switches of the first circuit breaker, the second circuit breaker and the automatic closing ring switch. Manual closing is usually used to test whether the operator can successfully close the circuit breaker through manual control when the automatic system fails or routine maintenance is performed.

[0112] The first submodule receives an automatic closing trigger signal (which may come from the control logic or external monitoring system). When the system logic determines that the main power supply has stabilized, it automatically sends a closing signal to the corresponding circuit breaker. The second submodule receives a manual closing command from the operating console or external controller. When the operator starts the manual closing switch, the module will activate the closing of the circuit breaker. After receiving the closing signal, the relevant circuit breaker (whether it is the first circuit breaker or the second circuit breaker) will perform a closing operation, close the circuit and start power supply. The successful execution of the closing signal will be fed back to the simulation test operating console through the system's status monitoring, so that the tester can evaluate the success of the operation. The closing module design includes multiple safety detections to ensure that the circuit is in a safe state before and after the closing operation to avoid electrical accidents. The system will monitor the closing process in real time and record relevant data, such as closing time, current changes, etc., for subsequent performance analysis and fault diagnosis.

[0113] The first and second submodules of the closing module provide comprehensive test functions that can simulate and verify the performance of the automatic closing device under various operating conditions. The simulation of automatic closing and manual closing not only increases the test coverage of the system, but also improves the reliability and safety of the equipment in actual operation. This simulation function helps to ensure that the low-voltage automatic closing device can work reliably in critical applications.

[0114] In any of the above embodiments, the closing and opening states also include an automatic opening state and a manual opening state; and the opening module includes a third submodule and a fourth submodule connected in parallel.

[0115] The third submodule simulates the automatic opening state by inputting the opening signal.

[0116] The fourth submodule is connected to the manual opening switch of the first circuit breaker, the second circuit breaker and the automatic closing ring switch, and simulates the manual opening state by inputting the opening signal.

[0117] In this embodiment, the third submodule (automatic tripping) is responsible for simulating the automatic tripping state, which is usually automatically triggered when a circuit abnormality (such as overload, short circuit, voltage or frequency abnormality, etc.) is detected. Automatic tripping is a safety-critical function, which is used to automatically disconnect the power supply when a fault occurs to prevent equipment damage and safety accidents; the fourth submodule (manual tripping) is responsible for simulating the manual tripping operation, which is usually used for testing, maintenance or manual intervention when the automatic system fails to respond correctly. Manual tripping allows the operator to directly disconnect the power supply under specific conditions, increasing the flexibility of control and the reliability of the system.

[0118] The third submodule receives the automatic trip trigger signal from the system detection module (such as the protection relay). This signal is based on the preset fault detection logic and is automatically generated when the system parameters exceed the safety range; the fourth submodule receives the manual control signal from the operating console or the signal of the manual trip switch directly activated by the operator, allowing manual control of the circuit breaker to disconnect; once these signals are activated, the corresponding submodule will send an electronic command to the connected circuit breaker (the first and second circuit breakers and the self-closing ring switch) to open it, thereby disconnecting the power supply. The execution of the trip operation is usually accompanied by instant feedback of the system status. Monitoring equipment such as status indicators or console interfaces will display the status of the current operation; to ensure operational safety, the trip module is designed with multiple safety checks to ensure that the system is in a safe state before and after any trip operation. The results of the trip operation and the system response are fed back to the operating console through the monitoring system for data recording and performance analysis.

[0119] The design of the third and fourth submodules provides comprehensive tripping operation simulation capabilities, which is essential for testing the performance of low-voltage automatic closing ring devices under various operating and fault conditions. By simulating automatic and manual tripping operations, the test system can not only evaluate the response speed and reliability of the device, but also verify the effectiveness of its safety protection functions. This simulation test is a key step in ensuring that the device can work safely and effectively in actual applications.

[0120] In any of the above embodiments, Figure 7-Figure 11 As shown, the closing signal and the opening signal constitute the control signal; and have the following situations:

[0121] In the first scenario, the first circuit breaker or the second circuit breaker and the automatic closing ring switch are switched between the automatic closing state and the automatic opening state respectively to simulate the automatic switching and self-restoring working condition or the remote control switching working condition of the low-voltage automatic closing ring device.

[0122] In the second scenario, the first circuit breaker or the second circuit breaker and the automatic closing ring switch are switched between the automatic closing state and the manual opening state respectively to simulate the automatic closing and manual opening condition of the low-voltage automatic closing ring device.

[0123] In scenario three, the first circuit breaker or the second circuit breaker and the automatic closing ring switch are switched between the manual closing state and the manual opening state respectively to simulate the manual switching working condition of the low-voltage automatic closing ring device.

[0124] In case four, the automatic closing ring switch switches between the manual closing state and the manual opening state to simulate the closing and tripping conditions of the low-voltage automatic closing ring device.

[0125] In this embodiment, a simple control signal can be used to enable the low-voltage automatic closing loop device to perform automatic closing and self-restoring conditions, remote control switching conditions, automatic manual switching conditions, manual switching conditions, and closing loop selection conditions. The closing signal is used to simulate the command to close the circuit breaker, that is, to connect the power supply to the load or other circuit parts. This signal is particularly important in the automatic closing state because it simulates the automatic response of the system when the power is restored; the opening signal is used to simulate the command to open the circuit breaker, that is, to disconnect the power supply to prevent the fault from spreading or to perform system maintenance. This signal is critical in the automatic opening state and is used to simulate the automatic protection action of the system when a fault is detected; the following is a specific description of each situation:

[0126] Scenario 1: Automatic switching and self-recovery refers to the ability of the system to automatically detect the elimination of the fault and reclose the circuit breaker to restore normal power supply after a power failure. This function ensures that the key system can quickly return to normal operation after a power failure; the remote switching condition allows the operator or automatic control system to remotely control the closing and opening of the circuit breaker, which is often used for system testing or remote operation and maintenance.

[0127] The control signal is generated by the control unit of the simulation test device. Based on the predetermined test script or the real-time command of the operator, the signal is transmitted to the corresponding circuit breaker and automatic closing ring switch through the electric control line to activate the closing or opening action; the simulation test device monitors the status of each circuit breaker and switch in real time to evaluate whether the closing or opening is performed as expected. Under the automatic switching and self-restoring working conditions, the device will monitor the power supply status and automatically send a closing signal when conditions permit. In the remote control switching working condition, the device responds to remote or automated control signals to operate; the system has built-in multiple safety checks to ensure that the system is in a safe state before and after any closing or opening operation. The results of all operations will be fed back to the console so that the operator can monitor the test progress in real time and make necessary adjustments or responses.

[0128] By precisely controlling the closing and opening signals, the simulation test device can effectively simulate the performance of the low-voltage automatic closing ring device in the automatic closing and automatic opening states, as well as the related automatic switching and automatic recovery and remote control switching conditions. These tests not only verify the functionality and response speed of the device, but also ensure that the device can operate safely and reliably in a real environment.

[0129] For the automatic start and recovery conditions, such as Figure 7As shown, under normal circumstances, it is assumed that circuit breaker No. 1 401 and circuit breaker No. 2 402 are connected to different power sources (for example, one is the main power source and the other is the backup power source). The self-closing loop switch 445 is in a neutral state, not connected to any power source, and the system operates stably; assuming that the main power source behind circuit breaker No. 1 401 fails (such as voltage drop, short circuit, etc.), the protection device or sensor in the system will detect this state and trigger the self-closing loop switch 445; the self-closing loop switch 445 automatically switches to disconnect the connection with the faulty power source (circuit breaker No. 1 401), and closes the switch to connect to the backup power source (circuit breaker No. 2 402). This process is usually completed within a few seconds to ensure that the power supply to key equipment and services is not interrupted; once the main power supply returns to normal (that is, the power failure behind circuit breaker No. 1 401 is repaired), the system automatically switches again through the self-closing loop switch 445, reconnects the main power source, and disconnects the backup power source (circuit breaker No. 2 402). In this way, the system returns to the original power supply configuration.

[0130] The system is equipped with necessary sensors and control logic to monitor the status of the two power supplies in real time. These sensors provide the necessary data to the control system to determine when power switching is required. The self-closing ring switch 445 is designed with a fast response mechanism, which can switch quickly at the moment of detecting a power failure, minimizing the power interruption time. The system can not only automatically switch to the backup power supply when a power failure occurs, but also automatically switch back to the original power supply after the failure is restored. The fully automated operation reduces the need for manual intervention and related operational delays.

[0131] The automatic switching and restoration condition is a highly automated power management strategy that ensures that the power system can maintain operation even in the face of power outages through continuous monitoring and rapid response, ensuring the continuity of key businesses and services. This condition is critical in any situation that requires high-reliability power supply, especially for critical infrastructure such as hospitals and data centers.

[0132] For remote control switching conditions, such as Fig.10As shown, circuit breaker No. 1 (401) and circuit breaker No. 2 (402) are respectively connected to two different power sources (such as one is the main power source and the other is the backup power source); the self-closing loop switch (445) is located between the two circuit breakers and is responsible for controlling the switching between the two power sources; in the initial state in the figure, the two circuit breakers may be in different operating states. For example, circuit breaker No. 1 is closed (closed state, indicating that it is connected to its power source), while circuit breaker No. 2 is open (open state, indicating that its power source is not connected). When it is necessary to switch the power source or perform system testing, the operator or the automation system operates the self-closing loop switch through a remote control signal; the switching command includes closing the unconnected circuit breaker and / or opening the connected circuit breaker. For example, if circuit breaker No. 1 needs to be disconnected due to a fault and the load needs to be transferred to circuit breaker No. 2, the remote control signal is used to open 401 and close 402; the remote control signal is transmitted to the automatic closing loop switch 445 through the control system, instructing it to perform the necessary circuit breaker operations. The automatic closing loop switch responds to these signals and performs closing or opening operations to ensure that the power supply is switched in the specified manner.

[0133] The control signal is sent from the remote control center or local control panel and transmitted to the control unit of the automatic closing loop switch through the communication network. The received control signal is decoded and converted into the corresponding closing or opening operation. The control logic ensures that all operations comply with system safety and operating specifications. The automatic closing loop switch adjusts its internal mechanism according to the received instructions to perform the operation of closing or opening the circuit breaker; after the operation is completed, the system status is updated and fed back to the operation center through the control system. This includes the current status of each circuit breaker (closing or opening) and any related system alarms or status information. This feedback mechanism ensures that the operator can monitor the operation results and make further adjustments or troubleshooting when necessary.

[0134] Remote control switching enables operators to remotely control the switching of power without direct contact with electrical equipment, which is critical to improving the flexibility and response speed of the system. Implementing remote control switching operations in power systems, especially when rapid response to power problems or system maintenance is required, can significantly improve operational efficiency and safety.

[0135] Scenario 2: In the automatic closing state, the system automatically performs the closing operation and reconnects the power supply after detecting that the power supply or the system has returned to normal. This usually involves switching back from the backup power supply to the main power supply or automatically reconnecting the disconnected circuit after detecting that the power supply has returned to normal; manual opening is a power-off operation that is performed by the operator or the automation system based on specific reasons (such as system detection, maintenance, fault diagnosis or safety considerations) after automatic closing. This requires direct human intervention to ensure the accuracy and safety of the operation.

[0136] Automatic closing means that the control system continuously monitors the power status and system health. When the system detects that the power is available or the conditions for reclosing are met, the automatic control logic triggers the closing operation, which is usually completed through the built-in automation mechanism without human intervention; manual opening means that although the system may have been automatically closed, the operator can issue an opening command through the control panel or remote control system based on real-time system evaluation or a predetermined maintenance plan. The closing operation means that after the control device receives the closing command, it performs a closing operation through the relevant electrical drive device (such as a motor-operated circuit breaker) to restore the power supply; the opening operation means that during the manual opening process, the operator sends an opening command through the console or remote interface, and the circuit breaker responds to these commands, disconnects the power supply, ensures the safety of the system or enters a maintenance state. Before and after performing any closing or opening operation, the system will perform necessary safety checks, such as detecting whether there is an electrical fault or environmental instability, and the operation results will be recorded by the system and fed back to the central control system, allowing the operator to monitor and verify the effectiveness and safety of the operation.

[0137] For the self-pitcher's recovery situation, such as Figure 8 As shown, in the figure, it is assumed that circuit breaker No. 1 (401) and circuit breaker No. 2 (402) are connected to different power sources respectively. The self-closing ring switch (445) is responsible for controlling the connection switching between the two power sources; assuming that due to some reason (such as failure of the main power supply), the self-closing ring switch 445 automatically operates to close the backup power supply (through circuit breaker No. 2 402) to maintain the power supply; although the system has automatically switched to the backup power supply, system detection or maintenance may be required, or due to safety protocols, manual verification of the stability or safety of the system is required. At this time, the operator needs to manually operate the circuit breaker to achieve the power disconnection; the operator manually issues a disconnection command through the control interface or directly operates the circuit breaker. In the figure, it may involve manually operating the self-closing ring switch 445 or directly operating any circuit breaker 401 or 402 to disconnect the current power connection.

[0138] After automatic closing, monitoring devices in the system (such as sensors and control logic) continue to detect the status and performance of the circuit. At the same time, the system also provides real-time data and control interfaces for operators to perform necessary manual operations; during manual opening, the system ensures that all safety protocols are followed, including confirming no-load operation or ensuring that circuit breaker operation will not cause electrical accidents; after manual opening, the system status is updated and fed back to the operation center through the control system. Operators can monitor the results of the operation, ensure that the power-off operation is correct, and perform further maintenance or repair work as needed.

[0139] The automatic recovery condition provides the flexibility to add manual control after the automatic closing event, allowing operators to manage power according to actual conditions. This condition is an important function to ensure that the power system can be automatically restored and manual intervention can be performed when necessary, especially for power system environments that require high reliability and safety.

[0140] Scenario 3: Manual closing operation is usually performed when power needs to be restored or switched. The operator performs the closing operation directly through the control panel or physical switch to connect the power supply to be used to the system; the manual opening operation is used to disconnect the current power supply, which may be for system maintenance, testing or emergency response. This is also performed manually by the operator through the control facility.

[0141] In manual switching conditions, all operations require direct human intervention. The operator selects the appropriate operation time and target circuit breaker (first circuit breaker or second circuit breaker) based on the current system requirements and status; even in manual operation, the system still performs necessary safety checks, such as detecting whether the circuit breaker can be operated safely and confirming that there is no risk of overload or short circuit. These checks help prevent electrical accidents during operation; after closing or opening, the operator needs to observe the operation results and system response. After the system status is updated, feedback information will be displayed on the control panel, allowing the operator to confirm whether the operation is performed as expected. The operator controls the closing and opening of the circuit breaker through the control panel or the manual switch directly at the circuit breaker. These interfaces are designed to be user-friendly to ensure simple and clear operation; even in manual operation, the system still provides real-time monitoring and records all operations and system responses. This data is crucial for subsequent performance evaluation and maintenance records; operators need to receive appropriate training and understand the working principle and safe operating procedures of the system to ensure that they can correctly perform manual switching conditions.

[0142] Manual switching is an important function in power systems, especially when the automatic system is unavailable or specific control is required. By providing full manual control options, the system ensures effective power management under various conditions while ensuring safe and reliable operation. This condition is suitable for a variety of scenarios, including but not limited to system testing, maintenance, and emergency operations.

[0143] For manual switching conditions, such as Fig. 9As shown, the operator manually closes the circuit breaker (401 or 402 in the figure) as needed to connect the selected power supply (main power supply or backup power supply) to the load; manual closing is usually performed after maintenance or when an automatic system failure is detected to ensure a stable supply of power; when the power needs to be disconnected, the operator will manually operate the circuit breaker to open the circuit. This can be to safely shut down the power for maintenance or to temporarily disconnect the power when diagnosing circuit problems. The opening operation is also an important means to evaluate system integrity and operational safety.

[0144] Operators perform closing and opening operations through physical operations (such as manual switches or buttons) or through the control system interface. These operations directly affect the physical state of the circuit breaker, enabling or disconnecting the power connection; even in manual operation, the system's safety monitoring device is still active to ensure that the circuit is in a safe state before and after any operation is performed, which includes detecting whether the line is overloaded, short-circuited or has other electrical hazards to ensure the safe operation; after the manual operation is completed, the system status is updated and fed back to the operator through the control panel. This allows them to verify the correctness of the operation and the response of the circuit. Real-time status updates and feedback help ensure the transparency and traceability of system operations. Design a simple and intuitive operating interface to ensure that operators can easily perform closing and opening operations and reduce the possibility of operating errors; operators are fully trained to ensure that they understand the purpose and steps of various operations, as well as safety measures.

[0145] Manual switching provides a flexible way to control power systems, especially when the automatic system cannot meet specific needs or fails. Through manual control, operators can accurately manage the switching on and off of power to ensure the safe and efficient operation of the system. This condition is particularly suitable for environments that require a high degree of control and supervision, such as industrial facilities, hospitals or other critical infrastructure.

[0146] Scenario 4: In the closed loop selection condition, manual closing is used to intentionally close the automatic closing loop switch to establish a complete power supply loop or connect a backup power supply. This can be used for system testing to confirm circuit integrity or the availability of backup paths; manual opening operation is used to disconnect the closed automatic closing loop switch, which is usually performed after testing or when it is determined that the loop needs to be temporarily disconnected. This operation allows the operator to control the complete disconnection of the power supply to ensure safety when performing any necessary maintenance or modifications.

[0147] Manual closing and opening operations rely on the judgment and control input of the operator. Based on the current system status and needs, the operator issues a closing or opening command through physical operation or through the control system; the automatic closing loop switch responds to the operation command and executes closing or opening. These operations have direct indicator lights or status displays on the control panel to provide immediate operation feedback. The system contains safety monitoring and diagnostic tools that continuously monitor the circuit status before and after the operation to ensure safe and correct operation; before performing any closing or opening operation, the system will perform a series of safety checks, such as detecting whether the line is overloaded or short-circuited. After the operation is completed, the system status is updated and fed back to the operator through the control system to ensure that they can verify the correctness of the operation and the response of the circuit. The designed operation interface should be simple and intuitive to ensure that operators can easily perform closing and opening operations and reduce the possibility of operating errors. Operators should receive special training on how to safely and effectively perform closing and tripping conditions and understand the risks and safety measures of the operation.

[0148] The closing loop selective tripping condition allows operators to perform precise power management when controlling the automatic closing loop switch, especially when it is necessary to test the system path or perform system maintenance. The implementation of this condition enhances the reliability and safety of the system and allows for a detailed assessment of the functionality and integrity of the power system. Through manual control, it can be ensured that in situations where the automatic system may not be able to respond accurately, manual direct control of the power supply switching can ensure accurate and safe operation.

[0149] For the closed loop selection condition, such as Fig.11 As shown, the closing operation involves connecting two power sources (controlled by circuit breakers 401 and 402) together using a self-closing closing switch (445) to form a closed power loop. This can be used to test the integrity of the loop or seamlessly switch to another power source when one power source fails; the selective tripping operation is performed after the loop is closed in order to disconnect from a specific power source, usually to troubleshoot, perform maintenance, or optimize power load distribution. In the figure, this may involve manually opening one of the circuit breakers (401 or 402) so that only one power source is used for power supply.

[0150] Manual closing means that the operator or the automation system first closes the self-closing switch (445) to connect the two power sources through the circuit breakers (401 and 402); manual selective tripping means that after the system determines that one power source needs to be disconnected, the corresponding circuit breaker is manually disconnected (for example, if the power source connected to circuit breaker 401 needs maintenance, 401 is manually disconnected); the system's built-in monitoring equipment will monitor the current, voltage and other key parameters in real time to ensure that the closing operation is safe and effective. The operator monitors the entire process through the control panel and adjusts the operation strategy based on system feedback; before performing any closing or selective tripping operation, the system will perform a series of safety checks to ensure that there is no risk of overload or short circuit. The system is designed with multiple protection measures, such as overload protection, short circuit protection and automatic power-off function, to prevent accidents during operation.

[0151] The closing and tripping condition is one of the key operations in advanced power system management, which allows operators to carefully control and optimize the power system while maintaining the continuity and reliability of power supply. By manually controlling the closing and tripping operations, various operating conditions can be flexibly responded to to ensure the stable operation and safety of the system. This condition is very suitable for complex industrial environments or critical infrastructures that require high reliability.

[0152] The embodiment of the second aspect of the present invention provides a method implemented by the simulation test device in any of the above embodiments, such as Fig.12 As shown, the method comprises the following steps:

[0153] S101, connecting the low-voltage self-closing ring device to the simulation test device through the interactive interface unit.

[0154] S102, controlling the low-voltage circuit breaker simulation unit through the test console to generate a control signal, and transmitting the control signal to the low-voltage automatic closing ring device.

[0155] S103, the low-pressure self-closing ring device is adjusted to a corresponding working state according to different control signals.

[0156] S104, judging whether the working state corresponds to the working signal, if so, judging it as qualified, if not, judging it as unqualified.

[0157] The present invention provides a method that can very accurately simulate the electrical environment under various actual operating conditions by accurately controlling the control signal generated by the low-voltage circuit breaker simulation unit and accurately transmitting it to the low-voltage self-closing ring device. This accurate simulation helps verify the performance of the device under a predetermined working state; and verifies whether the low-voltage self-closing ring device can correctly adjust its working state after receiving a specific control signal, thereby ensuring the reliability and safety of the device in actual use.

[0158] By systematically testing and evaluating the response of the low-voltage automatic closing loop device through a simulation test device, potential safety issues such as improper response and control signal parsing errors can be discovered in a timely manner, so that preventive measures can be taken to avoid safety accidents in actual applications; ensure that the equipment complies with relevant electrical safety and operating standards, and pave the way for further certification and approval.

[0159] The data collected during the testing process can be used to optimize the design of the low-voltage self-closing ring device and improve its operating efficiency and energy efficiency; by simulating different operating conditions, the weaknesses or failure modes of the equipment can be identified, enabling manufacturers to improve product design and reduce future failure rates.

[0160] By performing comprehensive testing in a controlled environment using simulated test fixtures, the need for on-site testing can be reduced, thereby reducing testing costs and time; problems can be discovered and resolved before the product is put on the market or in actual application, avoiding costly later repairs and loss of brand reputation.

[0161] The above embodiments are only used to illustrate the technical solutions of the present disclosure, rather than to limit them. Although the present disclosure has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present disclosure, and should all be included in the protection scope of the present disclosure.

Claims

1. A simulation test device for a low-pressure self-closing ring device, characterized in that: include: A test operation table, on which an analog display unit corresponding to the low-voltage self-closing ring device is formed; the analog display unit is used to display the working signal and control signal of the low-voltage self-closing ring device; A low-voltage circuit breaker simulation unit, used to generate the control signal, and the control signal is used to change the working state of the low-voltage self-closing ring device; the low-voltage circuit breaker simulation unit is respectively connected to the test operation platform and the interactive interface unit to transmit the control signal; An interactive interface unit comprises an input port and an output port; the input port is connected to the low-voltage self-closing ring device to obtain the working signal and input the control signal into the low-voltage self-closing ring device; the output port is connected to the low-voltage self-closing ring device to supply power during simulation.

2. A simulation test device for a low-pressure self-closing ring device according to claim 1, characterized in that: The low-voltage self-closing ring device comprises a first circuit breaker, a second circuit breaker and a self-closing ring switch connected through a three-phase circuit, and the self-closing ring switch is located between the first circuit breaker and the second circuit breaker; and The working state includes the closing and opening states of the first circuit breaker, the second circuit breaker and the automatic closing ring switch.

3. A simulation test device for a low-pressure self-closing ring device according to claim 2, characterized in that: The input port includes a current interface connected to at least one point on the three-phase circuit and a voltage interface connected to the three-phase circuit and a neutral circuit on the low-voltage self-closing loop device; and The working signal includes a voltage signal detected by the voltage interface and a current signal detected by the current interface, and the closing and opening states are represented by the current signals.

4. A simulation test device for a low-pressure self-closing ring device according to claim 3, characterized in that: The analog display unit includes a first indicator light module for displaying the closing and opening states and the voltage signal, and a second indicator light module for displaying the control signal; The first indicator light module and the second indicator light module are independent of each other.

5. A simulation test device for a low-pressure self-closing ring device according to claim 2, characterized in that: The low-voltage circuit breaker simulation unit includes a control circuit, which is connected to the first circuit breaker, the second circuit breaker and the self-closing ring switch respectively; the control circuit includes: A closing module, connected in series with the first circuit breaker, the second circuit breaker and the automatic closing loop switch, respectively, for inputting a closing signal; The opening module is respectively connected in parallel with the first circuit breaker, the second circuit breaker and the self-closing loop switch, and is used for inputting an opening signal.

6. A simulation test device for a low-pressure self-closing ring device according to claim 5, characterized in that: The closing and opening states include an automatic closing state and a manual closing state; and the closing module includes a first submodule and a second submodule connected in parallel with each other; A first submodule, simulating the automatic closing state by inputting the closing signal; The second submodule is connected to the first circuit breaker, the second circuit breaker and the manual closing switch of the automatic closing loop switch, and simulates the manual closing state by inputting the closing signal.

7. A simulation test device for a low-pressure self-closing ring device according to claim 6, characterized in that: The closing and opening states also include an automatic opening state and a manual opening state; and the opening module includes a third submodule and a fourth submodule connected in parallel with each other; A third submodule, simulating the automatic opening state by inputting the opening signal; The fourth submodule is connected to the manual opening switch of the first circuit breaker, the second circuit breaker and the automatic closing loop switch, and simulates a manual opening state by inputting the opening signal.

8. A simulation test device for a low-pressure self-closing ring device according to claim 7, characterized in that: The closing signal and the opening signal constitute the control signal; and have the following conditions: Scenario 1: the first circuit breaker or the second circuit breaker and the automatic closing ring switch are respectively switched between the automatic closing state and the automatic opening state to simulate the automatic switching and self-restoring working condition or the remote control switching working condition of the low-voltage automatic closing ring device; Scenario 2: the first circuit breaker or the second circuit breaker and the automatic closing ring switch are respectively switched between the automatic closing state and the manual opening state to simulate the automatic closing and manual opening state of the low-voltage automatic closing ring device; Scenario three: the first circuit breaker or the second circuit breaker and the automatic closing ring switch are respectively switched between the manual closing state and the manual opening state to simulate the manual switching working condition of the low-voltage automatic closing ring device; In scenario four, the automatic closing ring switch switches between the manual closing state and the manual opening state to simulate the closing and tripping condition of the low-voltage automatic closing ring device.

9. A simulation test device for a low-pressure self-closing ring device according to claims 5-8, characterized in that: The control circuit is connected between one phase circuit of the three-phase circuit and the neutral circuit.

10. A method implemented by the simulation test device according to any one of claims 1 to 9, characterized in that: The steps include: Connecting the low-pressure self-closing ring device to the simulation test device through the interactive interface unit; Controlling the low-voltage circuit breaker simulation unit to generate the control signal through the test operation platform, and transmitting the control signal to the low-voltage self-closing ring device; The low-pressure self-closing ring device is adjusted to the corresponding working state according to different control signals; Determine whether the working state corresponds to the working signal, if so, determine it as qualified, if not, determine it as unqualified.

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