Electrical screen cabinet suitable for automatic test of device

Abstract

The utility model discloses an electrical screen cabinet suitable for device automatic testing. The electrical screen cabinet comprises a screen cabinet main body frame. An automatic test area, a to-be-tested device area and a switch area are arranged in the screen cabinet main body frame; the automatic test area is used for accommodating an automatic test host, and a human-computer interaction interface and an auxiliary I / O device which are connected with the automatic test host; the to-be-tested device area is used for accommodating a plurality of to-be-tested devices; the auxiliary I / O device is respectively connected to the plurality of to-be-tested devices and is used for providing input and output signals for the plurality of to-be-tested devices; the switch area is used for accommodating a switch; and the switch is respectively connected to the plurality of devices to be tested, the automatic test host and the relay protection tester. According to the utility model, the aspects of size, heat dissipation, detachability, mobility, power management and the like are fully considered, and the test efficiency, safety and compatibility can be improved.

Description

Technical Field

[0001] This utility model relates to the field of experimental technology for relay protection and automatic safety devices, and in particular to an electrical cabinet suitable for automatic testing of devices. Background Technology

[0002] This utility model relates to the field of experimental technology for relay protection and automatic safety devices. Electrical cabinets, as core components of electrical engineering, are responsible for installing various electrical equipment, switches, relays, instruments, etc., and providing users with a convenient operation and monitoring interface. Their design and configuration must strictly adhere to the specific operating environment, load characteristics, and safety regulations to ensure the overall performance and safety of the electrical system.

[0003] Relay protection and automatic safety devices are crucial for the safety of modern power systems. Their key lies in utilizing advanced microprocessors and digital signal processing technology to ensure real-time and accurate monitoring and protection of the power system. These devices collect and process power system operating data, and based on pre-set complex protection logic, can quickly and accurately determine power system faults and execute corresponding pre-set actions when necessary.

[0004] Static simulation testing, conducted in a laboratory environment to simulate actual power grid operating conditions, verifies the functionality, performance, and reliability of devices, ensuring accurate identification of power grid faults and anomalies, which is crucial for guaranteeing product quality. Automated testing, performed using automated testing software, can be repeated, effectively improving testing efficiency and quality.

[0005] However, existing static simulation testing environments have the following shortcomings:

[0006] 1. The test environment needs to be set up manually, and there are a lot of repetitive operations when testing multiple sets of devices.

[0007] 2. After the product upgrade, the testing environment needs to be rebuilt and the test cases need to be redesigned, resulting in low automation and low efficiency.

[0008] Therefore, it is necessary to provide an electrical cabinet suitable for automatic testing of devices to solve problems such as insufficient versatility, low testing and data processing efficiency, and insufficient automation. Summary of the Invention

[0009] To overcome the shortcomings of existing technologies, this utility model proposes an electrical cabinet suitable for automatic testing of devices, which supports automatic testing of multiple devices, and is highly flexible and modular in structure, thereby improving testing quality and efficiency.

[0010] In one embodiment, the electrical cabinet of the present invention for automatic testing of devices includes: a cabinet main frame; the cabinet main frame is provided with an automatic testing area, a device under test area and a switch area;

[0011] The automatic testing area is used to accommodate the automatic testing host, as well as the human-machine interface and auxiliary I / O devices connected to the automatic testing host.

[0012] The device under test area is used to accommodate multiple devices under test; the auxiliary I / O devices are respectively connected to the multiple devices under test and are used to provide input and output signals to the multiple devices under test;

[0013] The switch area is used to house switches; the switches are respectively connected to the plurality of devices under test, the automatic test host, and the relay protection tester.

[0014] Furthermore, a bottom mounting frame and a left and right mounting frame located above the bottom mounting frame are stably installed within the main frame of the cabinet; the switch area is located within the bottom mounting frame; the automatic testing area is located in the area above the left mounting frame or the area above the right mounting frame; the device under test area is located in the area of ​​the left and right mounting frames excluding the automatic testing area.

[0015] Furthermore, the device under test area located in the left mounting frame includes N1 standard device layers, and the device under test area located in the right mounting frame includes N2 standard device layers, where N1 and N2 are both integers greater than or equal to 2; the size of each standard device layer matches that of a standard 4U device; and each standard device layer is equipped with a removable 2U baffle with adjustable mounting height on its left and right sides.

[0016] Furthermore, the device under test, auxiliary I / O device, and switch are all fixed to the corresponding mounting frame with cabinet screws.

[0017] Furthermore, the back of the main body of the cabinet is provided with a rear cabinet door; the left and right sides of the main body of the cabinet are provided with detachable side cabinet doors; and the detachable side cabinet doors are provided with pre-drilled external wiring holes.

[0018] Furthermore, the rear cabinet door, side cabinet door, and top of the main body of the cabinet are provided with heat dissipation holes; the top of the main body of the cabinet is also provided with a dustproof and heat dissipation component.

[0019] Furthermore, the dustproof and heat dissipation assembly includes a heat dissipation top cover and multiple support pillars for fixing the heat dissipation top cover to the main body of the cabinet.

[0020] Furthermore, the bottom of the main body of the cabinet is equipped with omnidirectional casters.

[0021] Furthermore, a DC main power supply, an AC main power supply, a power supply for auxiliary I / O devices, a matching power supply for each of the multiple devices under test, connecting wires, and wiring channels are installed in the space between the bottom mounting frame, the left mounting frame, the right mounting frame, and the main body of the cabinet; the AC main power supply is connected to the automatic test host and the relay protection tester respectively; the DC main power supply is connected to the multiple devices under test and the switch.

[0022] Furthermore, network cables are used for connecting the automatic test host, switch, relay protection tester, device under test, and auxiliary I / O devices.

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0024] 1. Multi-channel testing: Supports parallel connection and switch mode, enabling simultaneous testing of multiple devices and shortening the testing cycle.

[0025] 2. Flexibility: The dual-set cabinet design enhances compatibility and security, and is equipped with casters for easy fixing or moving, improving convenience.

[0026] 3. Modular: Easy to expand and adapt to future changes in testing equipment.

[0027] 4. High efficiency: Reduces repetitive operations, increases automation, and significantly improves testing efficiency.

[0028] 5. Safety: Heat dissipation and power distribution are fully considered to reduce safety hazards.

[0029] 6. Visualization: The signal routing is clear, saving time on line sorting.

[0030] In summary, the cabinet design of this utility model has taken full consideration in terms of size, heat dissipation, disassembly, mobility and power management to improve testing efficiency, safety and compatibility, realize the convenience of experimental scenarios and cover the testing needs of devices. Attached Figure Description

[0031] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings of the embodiments will be briefly introduced below. Obviously, the drawings described below only involve some embodiments of this utility model, and are not intended to limit this utility model.

[0032] Figure 1 This is a front structural diagram of the electrical cabinet of this utility model, which is suitable for automatic testing of devices.

[0033] Figure 2 This is a front structural cross-sectional diagram of the electrical cabinet of this utility model, which is suitable for automatic testing of devices.

[0034] Figure 3This is a side view of the electrical cabinet of the present invention, which is suitable for automatic testing of devices.

[0035] Figure 4 This is a schematic diagram of the rear structure of the electrical cabinet of this utility model, which is suitable for automatic testing of devices.

[0036] Figure 5 This is a schematic diagram of the top structure of the electrical cabinet of this utility model, which is suitable for automatic testing of devices.

[0037] Figure 6 This is a wiring terminal design drawing for an electrical cabinet suitable for automatic testing of devices according to this utility model. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions and applications of the embodiments of this utility model will be clearly and completely described.

[0039] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings:

[0040] In one embodiment, the electrical cabinet of this utility model suitable for automatic device testing includes:

[0041] The main frame of the cabinet; the main frame of the cabinet is provided with an automatic testing area, a device under test area and a switch area;

[0042] The automatic testing area is used to accommodate the automatic testing host, as well as the human-machine interface and auxiliary I / O devices connected to the automatic testing host.

[0043] The device under test area is used to accommodate multiple devices under test; the auxiliary I / O devices are respectively connected to the multiple devices under test and are used to provide input and output signals to the multiple devices under test;

[0044] The switch area is used to house switches; the switches are respectively connected to the plurality of devices under test, the automatic test host, and the relay protection tester.

[0045] The automatic test host can be a personal computer or test terminal capable of running computer programs. It is responsible for sending test commands, receiving test data, and performing data analysis and result display. The corresponding control program is existing technology. The human-machine interface may include a display screen, keyboard, mouse, and touch-screen LCD panel. The device under test is a relay protection device under test. The auxiliary I / O device is an auxiliary device used in a computer system or automated test system to realize input / output (I / O) functions. It is usually used to connect the data transmission between external devices and the automatic test host, acting as a bridge and link. For example, a multi-channel switch quantity acquisition and control module (such as an RS485 I / O controller) is used. The specific structure and usage are existing technology, and the specific model can be selected according to actual needs.

[0046] In this way, by connecting the automatic test host to multiple devices under test through auxiliary I / O devices and using a switch to transmit signals between the devices, multiple devices can be connected in parallel for simultaneous testing, thus shortening the test cycle.

[0047] Preferably, a bottom mounting frame, a left mounting frame, and a right mounting frame located above the bottom mounting frame are securely disposed within the main frame of the cabinet; the switch area is located within the bottom mounting frame; the automatic testing area is located in the area above the left mounting frame or the area above the right mounting frame; the device under test area is located in the areas of the left and right mounting frames excluding the automatic testing area. In this way, the mounting frames effectively divide the areas and ensure that each test device is securely installed.

[0048] Preferably, the device-under-test (DUT) area in the left mounting frame includes N1 standard device layers, and the DUT area in the right mounting frame includes N2 standard device layers, where N1 and N2 are both integers greater than or equal to 2. The size of each standard device layer matches that of a standard 4U device. Each standard device layer has a removable 2U baffle with adjustable mounting height on its left and right sides. In this way, the left and right mounting frames can form a single dual-screen cabinet configuration, which, together with the removable baffles, increases the number of DUTs that can be installed and improves installation compatibility.

[0049] Preferably, the device under test, auxiliary I / O device, and switch are all fixed in the corresponding mounting frame by cabinet screws to achieve a stable and detachable installation.

[0050] Preferably, the back of the main body of the cabinet is provided with a rear cabinet door; the left and right sides of the main body of the cabinet are provided with detachable side cabinet doors; the detachable side cabinet doors are provided with external wiring holes to facilitate connection with external lines.

[0051] Preferably, the rear door, side doors, and top of the main body of the cabinet are provided with ventilation holes; the top of the main body of the cabinet is also provided with a dustproof and heat dissipation component. This allows for better heat dissipation of the device and minimizes safety hazards. More preferably, the dustproof and heat dissipation component includes a heat dissipation top cover and multiple support pillars for fixing the heat dissipation top cover to the main body of the cabinet.

[0052] Preferably, the bottom of the cabinet body is equipped with universal casters to facilitate moving the electrical cabinet to the desired location as needed.

[0053] Preferably, a DC main power supply, an AC main power supply, a power supply for auxiliary I / O devices, individual power supplies for multiple devices under test (DUTs), connecting cables, and cable trays are installed in the space between the bottom mounting frame, the left mounting frame, the right mounting frame, and the main cabinet body. The AC main power supply is connected to the automatic test host and the relay protection tester. The DC main power supply is connected to the multiple DUTs and the switch. More preferably, the connecting cables between the automatic test host, the switch, the relay protection tester, the DUTs, and the auxiliary I / O devices are all network cables. This ensures that all wiring is completed inside the cabinet, improving safety and stability.

[0054] like Figure 1 As shown in a more specific embodiment, the electrical cabinet of this utility model for automatic device testing includes a cabinet body. The cabinet body, viewed from the front, includes: a device under test area, an automatic testing area, and a switch area.

[0055] • Cabinet Body: The main body of the cabinet measures 1.94m high × 1.5m wide × 0.8m deep. Compared to traditional cabinets (typically less than 1m wide), the cabinet body uses a single-unit dual-cabinet configuration, which not only enhances device compatibility and quantity but also ensures that all wiring is completed inside the cabinet, improving safety and stability. More specifically, Figure 3 The cabinet features detachable side doors for easy wiring, with pre-drilled holes for external wiring on the top and bottom. The cabinet's interior is divided into three sections from top to bottom: the device under test (DUT) area, the automatic testing area, and the switch area. Specifically, the first to fifth layers of the left mounting frame and the fourth to fifth layers of the right mounting frame house the DUT installation area. The first to third layers of the right mounting frame contain the automatic testing system's computer display and auxiliary I / O devices. The cabinet's maximum operating height is 1.8m, and the minimum is 0.6m; its depth is designed to be 0.8m greater than that of mainstream devices on the market. The position of the testing device can be freely adjusted according to the tester's height and habits. Once the testing platform height is adjusted, it is fixed in place, and the keyboard height can also be adjusted.

[0056] • Automated Testing Area: This is the core area for testing within the cabinet, housing the automated testing host, the human-machine interface (HMI), and auxiliary I / O devices connected to it. The automated testing area is located in the upper area of ​​either the left or right mounting frame. The HMI allows connection to the automated testing host, execution of pre-built test cases, comparison of actual output with pre-built results, and generation of test reports. The automated testing area may also be equipped with a touchscreen LCD panel, a pull-out mouse and keyboard tray, and a display screen for easy operation of the automated testing host.

[0057] • Devices under test (DUT) area: Located in the areas of the left and right mounting frames, excluding the automatic testing area. Designed for 7 standard 4U devices, each device layer is equipped with a removable 2U baffle. It can also be expanded laterally using custom baffles and can be freely adjusted according to device size. The design is compatible with mainstream 1U, 2U, 4U, 6U, and 8U device sizes on the market.

[0058] Figure 2 The diagram shown is a detailed schematic of the front structure of the electrical cabinet of this utility model. The proposed design includes the following devices: devices under test 1-7 and their respective power supplies, dustproof and heat dissipation components, AC main power supply, LCD screen, DC main power supply, DIO auxiliary device and power supply, keyboard and mouse, switch area, and universal casters.

[0059] • Devices under test 1-7 and their respective power supplies: The device under test area can accommodate 7 standard 4U test devices using a highly compatible mounting frame; the automatic test area can accommodate 1 auxiliary I / O 4U device; and the switch area can accommodate 2 standard 2U switches. All of these devices, including their respective power supplies, are fixed to the mounting frame with M6 cabinet screws, and the mounting frame is securely connected to the main body of the cabinet.

[0060] More specifically, the device under test area includes seven standard device layers, each with a standard 4U height. The left-side mounting frame and the vehicle-mounted mounting frame can simultaneously accommodate two rows of 4U chassis. A 2U baffle is reserved between the left-side mounting frames for isolation, and the space between the mounting frames is used for cable routing. Similarly, the standard 8U and 2U devices differ from the standard 4U only in height; installation can be achieved by adjusting the baffles up and down. The standard 6U differs in width from the 4U; a baffle is added above the reserved position of the 4U to fill the gap on the other side. Based on the external dimensions of the protection device, the width requirement of the device is met by adjusting the longitudinal beam with guide grooves, and the lateral width is filled by standard-sized baffles. Each relay protection device under test is installed on both sides and on the frame using fixing screws.

[0061] • Dustproof and heat dissipation components: The main body of the cabinet is equipped with multiple heat dissipation holes, including those located on the rear cabinet door at the back of the cabinet body and on the side cabinet doors on both sides (e.g., Figure 3 , Figure 4 ), and two dustproof heat dissipation components on top (such as Figure 5 ), to ensure effective heat dissipation.

[0062] • AC main power supply and DC main power supply: The power supply of the cabinet adopts multi-level circuit breaker protection, including both AC and DC main switches and branch switch power supplies, providing independent power to each device under test. The AC power supply is installed at the top and bottom of the cabinet through two power distribution units, serving the computer and relay protection tester; the DC power supply is dedicated to the device under test and the switch.

[0063] • The automatic test system comprises four parts: LCD display, DIO auxiliary devices and power supply, keyboard and mouse, and switch area. This area is specifically designed to house the automatic test system and connects to the device under test (DUT) via a switch. Analog signals are provided by a relay protection tester, which connects to the DUT's AC connector via terminal blocks. The relay protection tester can be placed at the bottom of the cabinet for easy analog input. Switching signals are connected to the DUT through auxiliary I / O devices within the automatic test system, using standard universal terminal blocks, such as... Figure 6 As shown, this design facilitates the reuse of external wiring. Except for the test instrument, all other equipment is embedded within the main mounting frame, and all signal cables are laid out in cable trays as designed. This built-in design aims to ensure the safe and uninterrupted operation of the automated test system.

[0064] • Omnidirectional casters: The bottom of the cabinet body is equipped with 6 omnidirectional casters for easy movement and positioning; at the same time, a removable baffle is reserved for easy access to the signal source from the bottom of the cabinet.

[0065] Based on the above structure, inside the test cabinet of this embodiment, different AC wiring positions of the devices under test are connected via rear-mounted terminals, and the other side of the terminal block is connected to the relay protection tester. The relay protection tester is connected to a communication switch via an Ethernet communication interface. The automatic test host device is connected to the communication switch and sends instructions to the relay protection tester through the switch, further controlling the signal input / output of the corresponding relay protection device under test. When switching between different relay protection devices under test, only the wiring at one end of the tester needs to be modified, which is convenient. During performance testing, according to the pre-set wiring diagram, analog quantity series and parallel connections can be achieved through the shorting metal contacts of the terminal blocks and pre-fabricated shorting wires. This allows for the sharing of a single set of signal input / output devices, ensuring the same testing and burn-in environment and improving the reuse rate of signal input / output devices. The input and output signals required during the test are provided by auxiliary I / O devices. The device's input corresponds to the output of the device under test, and vice versa, the output is connected to the input, and the automatic test system outputs the signals.

[0066] Based on the electrical control cabinet of this utility model, a common automatic testing architecture is introduced to illustrate the design. This automatic testing architecture consists of an automatic testing host, an Ethernet switch, a relay protection tester, multiple devices under test (DUTs), and auxiliary I / O devices. All connections are made via network cables. External wiring involves analog and digital signals. Digital signals include input and output signals. The DUTs are connected to the switch via their external network ports.

[0067] The specific operational steps for the practical application of electrical control cabinets are described below:

[0068] 1. Upon receiving an experimental task, first determine whether the size of the device under test requires adjustment of the test mounting frame. Place the device inside the mounting frame and connect the device's power supply to the power terminal of the control cabinet. Note that the device needs to be grounded during the experiment.

[0069] 2. According to the cabinet hardware configuration instructions, connect the relay protection tester's test lines to the cabinet's AC terminals, connect the auxiliary I / O device's inputs to the outputs of the device under test (DUT), and connect the auxiliary I / O device's outputs to the DUT's inputs. Connect the device's external network port to the switch. The external connection testing is complete; the next step is to begin testing.

[0070] 3. During the experiment, the heat dissipation components of the cabinet demonstrated good heat dissipation performance. The cabinet was tested in a closed space, and the entire process was carried out through an automatic testing system to perform operations such as adding analog quantities, adding switch quantities, and fixing set values. The cabinet supports 24-hour uninterrupted automatic testing and operation.

[0071] The specific embodiments described above are not limited to those described above. Those skilled in the art can make some modifications without departing from the scope of this utility model; that is, all equivalent modifications made in accordance with this utility model should be covered by the scope of this utility model.

Claims

1. An electrical cabinet suitable for automatic testing of devices, characterized in that: The system includes a main frame for the cabinet; the main frame of the cabinet is provided with an automatic testing area, a device under test area, and a switch area. The automatic testing area is used to accommodate the automatic testing host, as well as the human-machine interface and auxiliary I / O devices connected to the automatic testing host. The device under test area is used to accommodate multiple devices under test; the auxiliary I / O devices are respectively connected to the multiple devices under test and are used to provide input and output signals to the multiple devices under test; The switch area is used to accommodate switches; the switches are respectively connected to the plurality of devices under test, the automatic test host and the relay protection tester; The main frame of the cabinet is stably equipped with a bottom mounting frame and a left and right mounting frame located above the bottom mounting frame; the switch area is located within the bottom mounting frame; the automatic test area is located in the area above the left mounting frame or the area above the right mounting frame; the device under test area is located in the area of ​​the left and right mounting frames excluding the automatic test area. The device under test (DUT) area in the left mounting frame includes N1 standard device layers, and the DUT area in the right mounting frame includes N2 standard device layers, where N1 and N2 are both integers greater than or equal to 2; the size of each standard device layer matches that of a standard 4U device; each standard device layer has a removable 2U baffle with adjustable mounting height on its left and right sides.

2. The electrical cabinet for automatic testing of devices according to claim 1, characterized in that: The device under test, auxiliary I / O devices, and switch are all fixed to the corresponding mounting frame with cabinet screws.

3. The electrical switchgear cabinet suitable for automatic testing of devices according to claim 1, characterized in that, The back of the main body of the cabinet is provided with a rear cabinet door; the left and right sides of the main body of the cabinet are provided with detachable side cabinet doors; the detachable side cabinet doors are provided with pre-drilled holes for external wiring.

4. The electrical switchgear cabinet suitable for automatic testing of devices according to claim 3, characterized in that, The main body of the cabinet is provided with ventilation holes on the rear cabinet door, side cabinet door and top; the top of the main body of the cabinet is also provided with a dustproof and heat dissipation component.

5. The electrical cabinet suitable for automatic testing of devices according to claim 4, characterized in that, The dustproof and heat dissipation assembly includes a heat dissipation top cover and multiple support pillars for fixing the heat dissipation top cover to the main body of the cabinet.

6. The electrical switchgear cabinet suitable for automatic testing of devices according to claim 1, characterized in that, The bottom of the main body of the cabinet is equipped with omnidirectional casters.

7. The electrical switchgear cabinet suitable for automatic testing of devices according to claim 1, characterized in that, The space between the bottom mounting frame, the left mounting frame, the right mounting frame and the main body of the cabinet is equipped with a DC main power supply, an AC main power supply, a power supply for auxiliary I / O devices, power supplies for each of the multiple devices under test, connecting wires and wiring channels; the AC main power supply is connected to the automatic test host and the relay protection tester respectively; the DC main power supply is connected to the multiple devices under test and the switch.

8. The electrical switchgear cabinet suitable for automatic testing of devices according to claim 1, characterized in that, Network cables are used for connecting the automatic test host, switch, relay protection tester, device under test and auxiliary I / O devices.

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