Power distribution cabinet with multi-dimensional alarm structure
By designing a multi-dimensional alarm structure and alarm protection system in the distribution cabinet, the problem of lack of protection when electrical equipment is overheated is solved, efficient heat dissipation, flexible emergency treatment and safety performance are achieved, ensuring the stable operation of the power system .
Patent Information
- Application Number
- CN202411415961.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-11
- Publication Date
- 2024-12-20
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
Existing distribution cabinets lack overheating protection and alarm systems when electrical equipment is short-circuited or overloaded, which can easily cause safety accidents such as fires.
A distribution cabinet with a multi-dimensional alarm structure is designed, including a self-test alarm structure and an alarm protection system. By installing components such as beams, docking pipes, electromagnets, gas tanks and diffusion nozzles, self-test and overheating protection of electrical components are realized. Activate alarms and cooling protection measures in a timely manner.
It effectively reduces the risk of overheating and fire in electrical components, improves the safety performance of distribution cabinets, and improves flexibility and scalability through modular design to ensure the stable operation of the power system.
Smart Images
Figure CN119171288A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to a power distribution cabinet with a multi-dimensional alarm structure, and in particular to a power distribution cabinet with a multi-dimensional alarm structure applied in the field of power distribution cabinets. Background Art
[0002] The existing power distribution cabinet is an important part of the power system, mainly used to distribute electric energy, monitor and control power lines and electrical equipment. It assembles switchgear, measuring instruments, protective electrical appliances and auxiliary equipment in a closed or semi-closed metal cabinet or screen according to the electrical wiring requirements to form a low-voltage power distribution device.
[0003] The power distribution cabinet is a key link in the distribution of electric energy in the power system, which can distribute electric energy to various electrical equipment according to demand. Through measuring instruments and protective electrical appliances, the power distribution cabinet can monitor the operating status of power lines and electrical equipment in real time, and cut off the circuit or alarm in case of failure or abnormal operation.
[0004] In order to solve the problem of accuracy of the alarm of the distribution cabinet, a distribution cabinet in the market adopts the design of intelligent monitoring system, which has a certain market share.
[0005] Chinese invention patent CN114440981B discloses an alarm device for a smart grid distribution cabinet and a distribution cabinet. The circuit of the distribution cabinet is detected by a detection control module of a detection mechanism, and the temperature, humidity and smoke conditions inside the distribution cabinet are detected by an environmental data acquisition module of the detection mechanism. When the detection control module finds that there is an abnormality in the distribution cabinet based on the circuit detection condition and the environmental data detection condition, a bell alarm and a light alarm are respectively sounded through a ringing mechanism and an alarm light module, and the bell alarm is sounded by the cooperation of a servo motor, a spring, a metal ball and a metal shrapnel. The device has better anti-interference ability, can promptly detect operating defects of the distribution cabinet and give an alarm, avoiding the lag problem that the operation and maintenance personnel cannot promptly handle the abnormality of the distribution cabinet, and solves the technical problem that the existing distribution cabinet does not have an alarm function, it is difficult to promptly detect operating defects of the distribution cabinet, and the occurrence of power supply accidents and property losses of the distribution cabinet cannot be avoided.
[0006] When electrical equipment in existing distribution cabinets short-circuit or overload, a large amount of heat will be generated, causing the temperature inside the cabinet to rise. However, existing distribution cabinets do not have overheating protection and alarm systems, which can easily cause safety accidents such as fires. Summary of the invention
[0007] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is that when the electrical equipment in the existing distribution cabinet has a short circuit fault or is overloaded, a large amount of heat will be generated, causing the temperature inside the cabinet to rise. However, the existing distribution cabinet does not have an overheating protection and alarm system, which can easily cause safety accidents such as fire.
[0008] In order to solve the above problems, the present invention provides a power distribution cabinet with a multi-dimensional alarm structure, comprising a main cabinet body, a plurality of distribution beams are installed in the main cabinet body, the distribution beams include fixed beams with electrical components installed, a partition box is fixedly connected to the fixed beam, and the upper and lower ends of the partition box are provided with threading holes matching the electrical components; A protective shell is installed on the electrical component, wiring parts are installed at the upper and lower ends of the protective shell, a partition space is set between the electrical component and the protective shell, and an air inlet is opened at the side end of the protective shell; A self-checking alarm structure is installed at the opening of the partition box, and the self-checking alarm structure includes a mounting beam, one end of the mounting beam located in the partition box is plugged with a plurality of butt pipes facing the electrical components, a permanent magnet is installed at the top of the butt pipe, a plurality of electromagnets matching the permanent magnets are installed in the mounting beam, and a flow guide tube matching the butt pipe is passed through the mounting beam; a ventilation frame that slides relative to the partition box is clamped at one end of the mounting beam, and a plurality of ventilation holes are opened on the ventilation frame; an electric push rod is connected between the mounting beam and the partition box; An auxiliary rack is installed at the bottom of the main cabinet, and multiple gas tanks are installed on the auxiliary rack. Guide columns matching the gas tanks are installed at the side ends of the main cabinet; the multiple gas tanks are used to store low-temperature protective gas; The output end of the gas tank is located at the lower side of the auxiliary frame and communicates with the guide column. A conduit is connected between the guide column and multiple self-test alarm structures. An air pump for regulating the gas output of the gas tank is installed at the lower end of the auxiliary frame.
[0009] In the above-mentioned distribution cabinet with multi-dimensional alarm structure, the overall solution and effect are summarized in one sentence.
[0010] As a further improvement of the present application, when the self-test alarm structure is in an initial state, the mounting beam is separated from the partition box, and the electrical components dissipate heat through the air holes and the threading holes.
[0011] As a further improvement of the present application, a thermal expansion column is installed on the butt-joint pipe, the thermal expansion column is filled with a thermal expansion liquid, and the movable end of the thermal expansion column is fixedly connected to the movable insert pipe.
[0012] As a further improvement of the present application, a sealing cover is installed at the upper end of the gas tank, and a plurality of diffusion nozzles are installed on the sealing cover.
[0013] As another improved supplement of the present application, an alarm protection system is also included, the alarm protection system includes a processor installed in the main cabinet, and the processor is connected to a monitoring module, an alarm module, a self-checking module and a data processing module; The self-test module is used for self-testing the sealing of the protective shell; The monitoring module is used to detect the internal environment status of the main cabinet and the working status of multiple electrical components; The data processing module processes the monitoring data and analyzes and determines the working status of the power distribution cabinet and electrical components; when the data processing module processes the data, multiple electrical components in the same partition box are grouped together; The control module is provided with an abnormality handling unit, which is provided with an emergency protection mode and an independent protection mode. When the overall environmental parameters in the partition box are higher than the alarm value, the emergency protection mode is triggered; when the working state of the electrical components is abnormal, the independent protection mode is triggered; when the electrical components in the partition box exceed the set number to trigger the independent protection mode, the partition box triggers the emergency protection mode; The alarm module gives an alarm when the self-check fails and the abnormal processing unit is triggered. An alarm unit is installed on the self-check alarm structure, and a plurality of alarm lights matching the positions of the electrical components are connected to the alarm unit.
[0014] As another improved supplement of the present application, when the independent protection mode is working, the control module controls the electromagnet at the corresponding electrical component position to work so that the movable tube is stably inserted into the air inlet hole. At the same time, the solenoid valve in the docking tube is opened, and the protective gas is injected into the protective shell from the docking tube.
[0015] As another improvement of the present application, the specific work flow of the self-inspection module when conducting self-inspection on the protective shell includes: in multiple electrical component temperature operating time periods, controlling the electromagnet to work so that the movable plug is docked with the air inlet, and then using the corresponding connecting tube to introduce air flow into it, and then monitoring the temperature changes of the exhaust gas at various positions of the partition box; if the air flow temperature change value exceeds the set value, it is judged as poor airtightness, otherwise the self-inspection passes.
[0016] As another improvement of the present application, the working steps of the emergency protection mode include: controlling the electric push rod to work so that the self-test alarm structure and the partition box are closed, and then inputting protective gas into the partition box through a plurality of docking tubes; When multiple partition boxes trigger the emergency protection mode, the gas tank storing the protective gas releases the protective gas directly into the main cabinet through the nozzle on the top.
[0017] In summary, the power distribution cabinet of this solution provides reliable guarantee for the stable operation of the power system through its advantages and progress in multi-dimensional alarm and protection mechanism, efficient heat dissipation and cooling, flexible emergency handling, modular design and improved safety performance. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a stereogram of the first and second embodiments of the present application; Figure 2 It is a front view of the first and second embodiments of the present application; Figure 3 It is a side cross-sectional view of the first and second embodiments of the present application; Figure 4 for Figure 3 The structural diagram at A in the middle; Figure 5 This is a diagram showing the state changes of the butt joint pipes in the first and second implementation modes of the present application; Figure 6 It is a top view of the self-check alarm structure of the first and second embodiments of the present application; Figure 7 This is an exploded view of the self-check alarm structure of the first and second implementation modes of the present application; Figure 8 This is a diagram of the self-check alarm structure state changes in the first and second implementation modes of the present application.
[0019] Description of the numbers in the figure: 1 main cabinet, 11 electrical components, 12 protective shell, 2 distribution beam, 21 fixed beam, 22 partition box, 3 self-test alarm structure, 31 installation beam, 32 docking pipe, 33 guide pipe, 34 ventilation frame, 4 auxiliary frame, 5 gas tank, 6 guide column. DETAILED DESCRIPTION
[0020] The following describes two implementation modes of the present application in detail with reference to the accompanying drawings.
[0021] The first implementation method: Figure 1-8 A power distribution cabinet with a multi-dimensional alarm structure is shown, comprising a main cabinet 1, a plurality of distribution beams 2 are installed in the main cabinet 1, the distribution beams 2 include a fixed beam 21 with an electrical component 11 installed, a partition box 22 is fixedly connected to the fixed beam 21, and both upper and lower ends of the partition box 22 are provided with threading holes matching the electrical component 11; A protective shell 12 is installed on the electrical component 11, and wiring parts 13 are installed at the upper and lower ends of the protective shell 12. A partition space is provided between the electrical component 11 and the protective shell 12, and an air inlet is provided at the side end of the protective shell 12; A self-test alarm structure 3 is installed at the opening of the partition box 22. The self-test alarm structure 3 includes a mounting beam 31. One end of the mounting beam 31 located in the partition box 22 is plugged with a plurality of butt pipes 32 facing the electrical component 11. A permanent magnet is installed at the top of the butt pipe 32. A plurality of electromagnets matching the permanent magnet are installed in the mounting beam 31. A flow guide tube 33 matching the butt pipe 32 is passed through the mounting beam 31. A solenoid valve is installed at the connection between the flow guide tube 33 and the butt pipe 32. A ventilation frame 34 that slides relative to the partition box 22 is clamped at one end of the mounting beam 31. A plurality of ventilation holes are opened on the ventilation frame 34. An electric push rod is connected between the mounting beam 31 and the partition box 22. The electric push rod is used to close the self-test alarm structure 3 and the partition box 22. When the self-test alarm structure 3 is in the initial state, the mounting beam 31 is separated from the partition box 22, and the electrical component 11 dissipates heat through the air holes and the threading holes.
[0022] Optionally, a thermal expansion column is installed between the butt joint tube 32 and the mounting beam 31, the fixed end of the thermal expansion column is fixedly connected to the mounting beam 31, and the fixed end of the thermal expansion column is filled with a thermal expansion liquid, the movable end of the thermal expansion column is fixedly connected to the top of the butt joint tube 32, and a thermal expansion column that extends when heated is arranged between the butt joint tube 32 and the mounting beam 31, so that after the self-test alarm structure 3 and the partition box 22 are closed, when the electrical component 11 is overheated, the butt joint tube 32 extends along with the thermal expansion column (when the maximum extension length is reached, the butt joint tube 32 is inserted into the air inlet), so that the low-temperature protective gas discharged from the butt joint tube 32 can be closer to the electrical component 11, so that the airflow can fully cool the electrical component 11.
[0023] The low-temperature protective gas is input into the electrical component 11 through the butt joint 32 to cool down the electrical component 11 and protect it, and at the same time, it has a certain flame retardant effect. According to the situation of the power distribution cabinet, the butt joint 32 can be connected with the protective shell 12, so that the protective gas output by the butt joint 32 enters the space between the protective shell 12 and the electrical component 11, so that the outside of the electrical component 11 is covered and protected by the low-temperature protective gas; An auxiliary rack 4 is installed at the bottom of the main cabinet 1, and multiple gas tanks 5 are installed on the auxiliary rack 4. A guide column 6 matching the gas tank 5 is installed at the side end of the main cabinet 1, and an air flow channel is opened in the guide column 6. An exhaust valve for exhausting the guide column 6 is installed on the main cabinet 1; the multiple gas tanks 5 are used to store low-temperature protective gas, and the protective gas includes inert gas; the gas output from the gas tank 5 is guided into the designated self-test alarm structure 3 through the guide column 6; The input end of the guide column 6 may be equipped with a fan, and the input end of the fan is connected to the external environment. The guide column 6 may use the external space as the input air source, so that the electrical component 11 may use the external air as the cooling gas. The output end of the gas tank 5 is located at the lower side of the auxiliary frame 4 and is communicated with the guide column 6. A conduit is connected between the guide column 6 and the multiple self-test alarm structures 3. The conduit is an elastic bellows. An air pump for regulating the gas output of the gas tank 5 is installed at the lower end of the auxiliary frame 4. A sealing cover is installed at the upper end of the gas tank 5, and a plurality of diffusion nozzles are installed on the sealing cover. When the gas tank 5 is working normally, gas is output through the exhaust port at the lower end. In an emergency, the diffusion nozzle on the sealing cover can be opened. An electromagnetic valve is installed at the input end of the diffusion nozzle, and the diffusion nozzle can discharge the gas in the gas tank 5 directly into the main cabinet 1. The gas tank 5 of this embodiment is provided with two discharge modes, namely, an exhaust port and a diffusion nozzle. Different discharge modes are selected according to the degree of urgency to achieve flexible emergency handling.
[0024] In summary, the power distribution cabinet of the present embodiment has a multi-dimensional alarm and protection mechanism. By setting a self-test alarm structure 3, when the electrical component 11 overheats or other abnormal conditions occur, the alarm can be quickly activated, and the self-test alarm structure 3 and the partition box 22 are closed by an electric push rod to form a first layer of alarm and protection; the combination of the docking tube 32 and the protective shell 12 is introduced to achieve that when the electrical component 11 is abnormal, low-temperature protective gas is input into the closed space formed by the protective shell 12 outside the electrical component 11 to cool down and flame retardant, thereby forming a second layer of protection; through multi-layer protection and alarm mechanisms, the safety performance of the power distribution cabinet is greatly improved, and the risks of overheating and fire of electrical components are reduced.
[0025] The distribution cabinet of this embodiment adopts a modular design, and the distribution beam 2, self-test alarm structure 3 and gas tank 5 are easy to assemble, repair and replace. This modular design also improves the flexibility and scalability of the distribution cabinet, enabling it to adapt to distribution systems of different scales and needs.
[0026] Second implementation method: Figure 1-8 As shown, it also includes an alarm protection system, which includes a processor installed in the main cabinet 1, and a monitoring module, an alarm module, a self-test module and a data processing module are connected to the processor; The self-test module is used for self-testing the sealing of the protective shell 12; The monitoring module is used to detect the internal environment state of the main cabinet 1 and the working state of multiple electrical components 11; The data processing module processes the monitoring data and analyzes and determines the working status of the power distribution cabinet and the electrical components 11; when the data processing module processes the data, multiple electrical components 11 in the same partition box 22 are grouped together; An abnormality handling unit is provided in the control module, and the abnormality handling unit is provided with an emergency protection mode and an independent protection mode. When the overall environmental parameters in the partition box 22 are higher than the alarm value, the emergency protection mode is triggered; when the working state of the electrical component 11 is abnormal, the independent protection mode is triggered; when the electrical components 11 in the partition box 22 exceed the set number to trigger the independent protection mode, the partition box 22 triggers the emergency protection mode; The alarm module will sound an alarm when the self-test fails and the abnormal processing unit is triggered. An alarm unit is installed on the self-test alarm structure 3. The alarm unit is connected to a plurality of alarm lights matching the positions of the electrical components 11. When any electromagnet is working, the alarm light at the corresponding position is turned on, and an audible and visual alarm is sounded through the alarm unit to mark the abnormal electrical component 11.
[0027] When the independent protection mode is working, the control module controls the electromagnet at the position of the corresponding electrical component 11 to work so that the movable plug can be stably inserted into the air inlet. At the same time, the solenoid valve in the docking tube 32 is opened, and the protective gas is injected into the protective shell 12 from the docking tube 32.
[0028] The specific working process of the self-test module for the protective shell 12 includes: in the temperature working time period of multiple electrical components 11, the electromagnet is controlled to work so that the movable plug is docked with the air inlet, and then the corresponding docking tube 32 is used to pass air into it, and then the temperature change of the exhaust gas at each position of the partition box 22 is monitored; if the airflow temperature change value exceeds the set value, it is judged as poor airtightness, otherwise the self-test is passed; multiple temperature sensors matching the threading hole positions are installed on the fixed beam 21, and multiple temperature sensors distributed along the air permeable frame 34 are installed on the self-test alarm structure 3; the temperature sensor at the air permeable frame 34 is used to detect the average temperature of the exhaust gas at the air permeable frame 34; The working steps of the emergency protection mode include: controlling the electric push rod to work, so that the self-test alarm structure 3 and the partition box 22 are closed, and then inputting protective gas into the partition box 22 through a plurality of connecting pipes 32; When the multiple partition boxes 22 all trigger the emergency protection mode, the gas tank 5 storing the protective gas directly releases the protective gas into the main cabinet 1 through the nozzle on the top.
[0029] In summary, this implementation achieves intelligent management and efficient protection of the power distribution cabinet. The power distribution cabinet can monitor its internal environment and the working status of electrical components in real time. Once an abnormality is found, the corresponding protection and alarm measures can be quickly initiated.
[0030] In the independent protection mode, when an electrical component 11 is in an abnormal working state, the control module can accurately control the electromagnet at the corresponding position and the solenoid valve at the butt joint 32 to ensure that the cryogenic protection gas can be accurately injected into the protective shell 12 of the electrical component 11 to achieve accurate protection. This independent protection mode not only improves the protection efficiency, but also avoids unnecessary waste of resources.
[0031] In the emergency protection mode, when the overall environmental parameters in the partition box exceed the alarm value, the control module will control the electric push rod to close the self-test alarm structure 3 and the partition box 22, and input protective gas into the partition box 22 through multiple docking tubes 32. If multiple partition boxes 22 all trigger the emergency protection mode, the gas tank 5 storing the protective gas will directly release the protective gas into the main cabinet through the nozzle on the top to minimize the risk of fire and the like.
[0032] In addition, the present embodiment also performs airtightness self-inspection on the protective shell 12 through the self-inspection module to ensure that the protective gas can be effectively injected into the protective shell 12 when necessary. This self-inspection mechanism greatly improves the reliability and safety of the power distribution cabinet.
[0033] In summary, the power distribution cabinet of this solution provides reliable guarantee for the stable operation of the power system through its advantages and progress in multi-dimensional alarm and protection mechanism, efficient heat dissipation and cooling, flexible emergency handling, modular design and improved safety performance.
[0034] In view of current practical needs, the above-mentioned implementation mode adopted in this application is not limited to the scope of protection. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the scope of protection of the present invention.
Claims
1. A power distribution cabinet with a multi-dimensional alarm structure, comprising a main cabinet (1), wherein a plurality of distribution beams (2) are installed in the main cabinet (1), characterized in that: The distribution beam (2) comprises a fixed beam (21) on which an electrical component (11) is mounted, a partition box (22) being fixedly connected to the fixed beam (21), and threading holes matching the electrical component (11) being provided at both upper and lower ends of the partition box (22); A protective shell (12) is installed on the electrical component (11), wiring portions (13) are installed at the upper and lower ends of the protective shell (12), a partition space is provided between the electrical component (11) and the protective shell (12), and an air inlet is provided at a side end of the protective shell (12); A self-test alarm structure (3) is installed at the opening of the partition box (22), and the self-test alarm structure (3) comprises a mounting beam (31), one end of the mounting beam (31) located in the partition box (22) is plugged with a plurality of butt joint tubes (32) facing the electrical element (11), a permanent magnet is installed at the top of the butt joint tube (32), a plurality of electromagnets matching the permanent magnet are installed in the mounting beam (31), and a flow guide tube (33) matching the butt joint tube (32) is penetrated in the mounting beam (31); a ventilation frame (34) sliding relative to the partition box (22) is clamped at one end of the mounting beam (31), and a plurality of ventilation holes are opened on the ventilation frame (34); an electric push rod is connected between the mounting beam (31) and the partition box (22); An auxiliary frame (4) is installed at the bottom of the main cabinet (1), a plurality of gas tanks (5) are installed on the auxiliary frame (4), and a guide column (6) matching the gas tanks (5) is installed at the side end of the main cabinet (1); the plurality of gas tanks (5) are used to store low-temperature protective gas; The output end of the gas tank (5) is located at the lower side of the auxiliary frame (4) and communicates with the guide column (6), and a conduit is connected between the guide column (6) and the plurality of self-test alarm structures (3). An air pump for regulating the gas output of the gas tank (5) is installed at the lower end of the auxiliary frame (4).
2. A power distribution cabinet with a multi-dimensional alarm structure according to claim 1, characterized in that: When the self-test alarm structure (3) is in an initial state, the mounting beam (31) is separated from the partition box (22), and the electrical component (11) dissipates heat through the air holes and the threading holes.
3. The power distribution cabinet with a multi-dimensional alarm structure according to claim 1, characterized in that: A movable insert is installed between the butt joint pipe (32) and the mounting beam (31), a thermal expansion column is installed on the movable insert, a fixed end of the thermal expansion column is fixedly connected to the mounting beam (31), a thermal expansion liquid is filled in the fixed end of the thermal expansion column, and a movable end of the thermal expansion column is fixedly connected to the top end of the butt joint pipe (32).
4. The power distribution cabinet with a multi-dimensional alarm structure according to claim 1, characterized in that: A sealing cover is installed at the upper end of the gas tank (5), and a plurality of diffusion nozzles are installed on the sealing cover.
5. The power distribution cabinet with a multi-dimensional alarm structure according to claim 4, characterized in that: It also includes an alarm protection system, the alarm protection system includes a processor installed in the main cabinet (1), and the processor is connected to a monitoring module, an alarm module, a self-checking module and a data processing module; The self-test module is used for self-testing the sealing performance of the protective shell (12); The monitoring module is used to detect the internal environment state of the main cabinet (1) and the working state of multiple electrical components (11); The data processing module processes the monitoring data to analyze and determine the working status of the power distribution cabinet and the electrical components (11); when the data processing module processes the data, multiple electrical components (11) in the same partition box (22) are grouped together; The control module is provided with an abnormality processing unit, and the abnormality processing unit is provided with an emergency protection mode and an independent protection mode. When the overall environmental parameter in the partition box (22) is higher than the alarm value, the emergency protection mode is triggered; when the working state of the electrical element (11) is abnormal, the independent protection mode is triggered; when the number of electrical elements (11) in the partition box (22) exceeding a set number triggers the independent protection mode, the partition box (22) triggers the emergency protection mode; The alarm module issues an alarm when the self-test fails and the abnormality processing unit is triggered. The self-test alarm structure (3) is equipped with an alarm unit, and the alarm unit is connected to a plurality of alarm lights that match the positions of the electrical components (11).
6. A power distribution cabinet with a multi-dimensional alarm structure according to claim 5, characterized in that: When the independent protection mode is in operation, the control module controls the electromagnet at the position of the corresponding electrical element (11) to operate so that the movable insert tube is stably inserted into the air inlet, and at the same time the solenoid valve in the docking tube (32) is opened, and the protective gas is injected into the protective shell (12) from the docking tube (32).
7. The power distribution cabinet with a multi-dimensional alarm structure according to claim 5, characterized in that: The specific working process of the self-inspection module when performing self-inspection on the protective shell (12) includes: in the temperature working time period of multiple electrical components (11), controlling the electromagnet to work so that the movable plug is connected to the air inlet, and then using the corresponding connecting pipe (32) to pass air into it, and then monitoring the temperature change of the exhaust gas at each position of the partition box (22); if the air flow temperature change value exceeds the set value, it is judged that the airtightness is poor; if not, the self-inspection is passed.
8. The power distribution cabinet with a multi-dimensional alarm structure according to claim 5, characterized in that: The working steps of the emergency protection mode include: controlling the electric push rod to operate so that the self-test alarm structure (3) and the partition box (22) are closed, and then inputting protective gas into the partition box (22) through a plurality of docking tubes (32); When the multiple partition boxes (22) all trigger the emergency protection mode, the gas tank (5) storing the protective gas releases the protective gas directly into the main cabinet (1) through the nozzle on the top.