Ground fault distributed positioning terminal multifunctional integrated matching cabinet

Abstract

The utility model provides a multifunctional integrated matching cabinet for a ground fault distributed positioning terminal. The multifunctional integrated matching cabinet comprises a box body, a distributed module mounting plate is fixed in the box body, a first metal guide rail, a wiring channel and a heater are fixed at the distributed module mounting plate, and a ground fault distributed positioning terminal and a power supply air switch are fixed at the first metal guide rail; a standby power supply and a dehumidifier are respectively fixed on two sides in the box body; a second metal guide rail and a case door lock are fixed on a case cabinet door; an encrypted wireless communication module, a wireless communication module electrostatic shielding cover and a temperature and humidity sensing and control device are fixed at the second metal guide rail; a solar panel, a communication antenna and an antenna pressing plate are fixed at the top end of the box body, and an aviation socket for collecting current, an aviation socket for a power supply, a waterproof joint shared by the communication antenna and the solar panel and a waterproof joint for a dehumidifier are arranged at the bottom end of the box body; according to the utility model, a modularized equipment installation structure is adopted, the electromagnetic protection capability is enhanced, and the environment regulation and control equipment and the composite power supply device are integrated.

Description

Technical Field

[0001] This utility model relates to the field of power grid equipment installation box technology, and in particular to a multi-functional integrated supporting box cabinet for a ground fault distributed positioning terminal. Background Technology

[0002] In existing installation boxes for distributed positioning terminals with grounding faults, a decentralized installation architecture is adopted. Different functional modules (positioning terminal, power supply, communication, etc.) need to be installed and fixed independently, resulting in messy and cross-shaped wiring inside the box. There is a lack of integrated installation structure design, and the functional units do not form standardized interfaces. The connection between modules requires manually customized cables, which increases the complexity of construction. At the same time, traditional installation boxes often rely solely on natural ventilation and lack active environmental control devices. Condensation is easily caused by poor air circulation inside the sealed box. In addition, traditional installation boxes do not implement electromagnetic shielding for high-frequency communication circuits, signal lines and power lines are not isolated, and unreasonable antenna placement causes near-field coupling interference. Utility Model Content

[0003] This utility model proposes a multi-functional integrated cabinet for a distributed grounding fault location terminal. It adopts a modular equipment installation structure and enhances electromagnetic protection capabilities, while integrating environmental control equipment and a composite power supply device.

[0004] The present invention adopts the following technical solution.

[0005] A multi-functional integrated cabinet for a ground fault distributed positioning terminal includes a cabinet body (1), one side of which is connected to a cabinet door (3) via a hinge; a distributed module mounting plate (2) is fixed inside the cabinet body (1), and a first metal guide rail (25), a wiring trough (10) and a heater (22) are fixed at the distributed module mounting plate (2), and a ground fault distributed positioning terminal (4) and a power circuit breaker are fixed at the first metal guide rail (25);

[0006] A backup power supply (8) and a dehumidifier (9) are fixed on the two sides inside the cabinet body (1); a second metal guide rail (26) and a cabinet door lock (21) are fixed on the cabinet door (3); an encrypted wireless communication module (6), a wireless communication module electrostatic shielding cover (15) and a temperature and humidity sensing and control device (7) are fixed at the second metal guide rail (26).

[0007] The top of the housing body (1) is fixed with a solar panel (11), a communication antenna (18) and an antenna pressure plate (19), and the bottom of the housing body (1) is provided with an aviation socket (12) for current sampling, an aviation socket (13) for power supply, a waterproof connector (14) for communication antenna and solar panel, and a waterproof connector (23) for dehumidifier.

[0008] The rear end of the box body (1) is welded with a C-shaped guide rail (16) and a clamping slider (17).

[0009] The hinge is a stainless steel hinge (24); the power circuit breaker is a 1P power circuit breaker (5).

[0010] The communication antenna and solar panel share a waterproof connector (14), and the dehumidifier uses a waterproof connector (23), both of which are M20 waterproof connectors;

[0011] The solar panel (11) is installed at the top of the box body (1) in an inclined position by a bracket, with an inclination angle ranging from 15° to 45°, and the surface is covered with a dustproof and waterproof nano coating; the communication antenna and the solar panel share an M20 waterproof connector to supply power to the backup power supply (8) inside the box.

[0012] The backup power supply (8) is a lithium iron phosphate battery pack with a built-in overcharge and over-discharge protection module, which is detachably connected to the side wall of the housing body (1) by a rivet screw.

[0013] The dehumidifier (9) is a dehumidifier based on semiconductor condensation dehumidification. It has a replaceable dust filter at the M20 waterproof connector at the inlet and outlet of the dehumidifier. The start and stop of the dehumidifier is controlled by the temperature and humidity sensing and control device (7) connected to it.

[0014] Both the first and second metal guide rails are zinc-plated aluminum alloy guide rails with an Ω-shaped cross-section. The top of the guide rail is equipped with an anti-disengagement buckle, and the bottom of the guide rail is equipped with a quick-connect terminal.

[0015] The communication antenna (18) is fitted with a lightning protection sleeve at its base. The lightning protection sleeve is composed of a gas discharge tube and a metal oxide film resistor connected in parallel. The lightning protection sleeve has an impact voltage of ≥20kV. The lightning protection sleeve is fixed to the main body (1) of the box by the antenna pressure plate (19).

[0016] The electrostatic shielding cover (15) of the wireless communication module is a double-layer copper mesh sandwiched with aluminum foil structure. The inner wall of the electrostatic shielding cover of the wireless communication module is covered with wave-absorbing material, and the shielding effectiveness of the electrostatic shielding cover of the wireless communication module is ≥60dB.

[0017] The chassis door lock (21) is a three-proof mechanical combination lock, and the lock cylinder is equipped with a silicone sealing ring.

[0018] The cabinet door lock is equipped with a concealed hinge limiter to restrict the opening and closing angle of the cabinet door to 180°.

[0019] The temperature and humidity sensing and control device (7) includes a dual redundant digital temperature and humidity sensor, a fuzzy PID control unit and a self-calibration module. The temperature and humidity sensing and control device is used to control the start-up and shutdown states of the heater (22) and the dehumidifier (9).

[0020] This utility model features a modular installation structure, which improves maintenance efficiency. The built-in temperature control and dehumidification devices enhance the environmental adaptability and regulation capabilities of the enclosure. The added electrostatic shielding improves the electromagnetic compatibility between internal devices. At the same time, the intelligent composite power supply system improves the device's battery life and ability to respond to emergencies. Attached Figure Description

[0021] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0022] Appendix Figure 1 This is a structural diagram of a multi-functional integrated cabinet for a grounding fault distributed positioning terminal (without the electrostatic shielding cover of the wireless communication module).

[0023] Appendix Figure 2 This is another structural diagram of a multi-functional integrated cabinet for a grounding fault distributed positioning terminal (with an electrostatic shielding cover for the wireless communication module installed).

[0024] Appendix Figure 3 A bottom view of a multi-functional integrated cabinet for a ground fault distributed positioning terminal;

[0025] Appendix Figure 4 A side view schematic diagram of a multi-functional integrated cabinet for a ground fault distributed positioning terminal;

[0026] Appendix Figure 5 A front view diagram of a multi-functional integrated cabinet for a ground fault distributed positioning terminal before the cabinet door is opened.

[0027] Appendix Figure 6 A rear view diagram of a multi-functional integrated cabinet for a ground fault distributed positioning terminal before the cabinet door is opened.

[0028] Appendix Figure 7 A side view of a multi-functional integrated cabinet for a ground fault distributed positioning terminal before the cabinet door is opened.

[0029] Appendix Figure 8 A three-dimensional schematic diagram of a multi-functional integrated cabinet for a ground fault distributed positioning terminal before the cabinet door is opened.

[0030] Appendix Figure 9 A three-dimensional schematic diagram of a multi-functional integrated cabinet for a ground fault distributed positioning terminal after the cabinet door is opened;

[0031] In the diagram: 1. Cabinet body; 2. Distributed module mounting plate; 3. Cabinet door; 4. Grounding fault distributed positioning terminal; 5. 1P power circuit breaker; 6. Encrypted wireless communication module; 7. Temperature and humidity sensor and control device; 8. Backup power supply; 9. Dehumidifier; 10. Cable tray; 11. Solar panel; 12. Aviation socket for current sampling; 13. Aviation socket for power supply; 14. Waterproof connector shared by communication antenna and solar panel; 15. Electrostatic shielding cover for wireless communication module; 16. C-shaped guide rail; 17. Clamp slider; 18. Communication antenna; 19. Antenna pressure plate; 20. Chassis grounding post; 21. Chassis door lock; 22. Heater; 23. Waterproof connector for dehumidifier; 24. Stainless steel hinge; 25. First metal guide rail; 26. Second metal guide rail. Detailed Implementation

[0032] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Those skilled in the art can implement the technical solutions based on the description without departing from the principle of the present invention.

[0033] As shown in the figure, a multi-functional integrated cabinet for a ground fault distributed positioning terminal includes a cabinet body 1. One side of the cabinet body 1 is connected to the cabinet door 3 via a hinge. A distributed module mounting plate 2 is fixed inside the cabinet body 1. A first metal guide rail 25, a cable tray 10, and a heater 22 are fixed on the distributed module mounting plate 2. A ground fault distributed positioning terminal 4 and a power circuit breaker are fixed on the first metal guide rail 25.

[0034] A backup power supply 8 and a dehumidifier 9 are fixed on the two sides inside the cabinet body 1, respectively; a second metal guide rail 26 and a cabinet door lock 21 are fixed on the cabinet door 3, and an encrypted wireless communication module 6, a wireless communication module electrostatic shielding cover 15 and a temperature and humidity sensing and control device 7 are fixed at the second metal guide rail 26.

[0035] The top of the housing body 1 is fixed with a solar panel 11, a communication antenna 18 and an antenna pressure plate 19, and the bottom of the housing body 1 is provided with an aviation socket 12 for current sampling, an aviation socket 13 for power supply, a waterproof connector 14 for communication antenna and solar panel and a waterproof connector 23 for dehumidifier.

[0036] The rear end of the housing body 1 is welded with a C-shaped guide rail 16 and a clamping slider 17.

[0037] The hinge is a stainless steel hinge 24; the power circuit breaker is a 1P power circuit breaker 5.

[0038] The waterproof connector 14 shared by the communication antenna and solar panel and the waterproof connector 23 for the dehumidifier are both M20 waterproof connectors.

[0039] The solar panel 11 is mounted on the top of the housing body 1 at an angle with a bracket, the angle of which is 15°-45°, and the surface is covered with a dustproof and waterproof nano-coating; the communication antenna and the solar panel share an M20 waterproof connector to supply power to the backup power supply 8 inside the housing.

[0040] The backup power supply 8 is a lithium iron phosphate battery pack with a built-in overcharge and over-discharge protection module, which is detachably connected to the side wall of the housing body 1 by press-fit screws.

[0041] The dehumidifier 9 is a dehumidifier based on semiconductor condensation dehumidification. It has replaceable dust filters at the M20 waterproof connectors at its inlet and outlet. The start and stop of the dehumidifier are controlled by the temperature and humidity sensing and control device 7 connected to it.

[0042] Both the first and second metal guide rails are zinc-plated aluminum alloy guide rails with an Ω-shaped cross-section. The top of the guide rail is equipped with an anti-disengagement buckle, and the bottom of the guide rail is equipped with a quick-connect terminal.

[0043] The communication antenna 18 is fitted with a lightning protection sleeve at its base. The lightning protection sleeve is composed of a gas discharge tube and a metal oxide film resistor connected in parallel. The lightning protection sleeve has an impulse voltage of ≥20kV. The lightning protection sleeve is fixed to the housing body 1 by the antenna pressure plate 19.

[0044] The electrostatic shielding cover 15 of the wireless communication module has a double-layer copper mesh sandwiched with aluminum foil structure. The inner wall of the electrostatic shielding cover of the wireless communication module is covered with wave-absorbing material, and the shielding effectiveness of the electrostatic shielding cover of the wireless communication module is ≥60dB.

[0045] The chassis door lock 21 is a three-proof mechanical combination lock, and the lock cylinder is equipped with a silicone sealing ring.

[0046] The cabinet door lock is equipped with a concealed hinge limiter to restrict the opening and closing angle of the cabinet door to 180°.

[0047] The temperature and humidity sensing and control device 7 includes a dual-redundant digital temperature and humidity sensor, a fuzzy PID control unit, and a self-calibration module. The temperature and humidity sensing and control device is used to control the start-up and shutdown states of the heater 22 and the dehumidifier 9.

[0048] Example 1:

[0049] like Figure 1As shown, the cabinet body (1) is made of 1.5mm thick 304 stainless steel by stamping, and the overall dimensions are 220mm×140mm×260mm (length×width×height). The cabinet door (3) is connected to the cabinet body by 4 sets of stainless steel hinges (24), with the hinges evenly spaced at 20mm intervals, and the opening angle is limited to 180°. A distributed module mounting plate (2) is welded inside the cabinet. This mounting plate is made of 1mm galvanized steel plate, with an insulating epoxy resin coating sprayed on the surface, and is fixed to the side wall of the cabinet by M8 hexagonal bolts (150mm spacing).

[0050] Ground fault location terminal (4): It adopts an FPGA+ARM dual-core processor architecture and is installed in slots 2-4 of the metal rail (25). The sampling rate is set to 10kHz. The external signal line is connected to the wiring duct (10) in the box and connected to the ground fault location terminal (4) through the aviation plug (12).

[0051] Encrypted wireless communication module (6): LoRaWAN communication module (frequency band 470MHz) is selected and fixed at the top of the metal guide rail (26) of the cabinet door. The antenna interface is connected to the communication antenna (18) through the M20 waterproof connector (for communication antenna and solar panel).

[0052] Solar panel (11): A monocrystalline silicon module is selected and installed on the top of the box through an aluminum alloy bracket (adjustable range 15°-45°). The bracket base is fixed with M10 stainless steel bolts, and the output line is passed through the box through an M20 waterproof connector (for communication antenna and solar panel) (14) and connected to the MPPT charging controller of the lithium iron phosphate battery pack (8).

[0053] Backup power supply (8): It consists of 4 3.2V / 100Ah cells connected in series, with a total voltage of 12.8V. It is fixed to the left side of the box by rivet screws (120mm spacing). The overcharge and over-discharge protection board (300mA equalization current) is integrated on the top of the battery pack. The output is distributed to each electrical device through 1P circuit breaker (5).

[0054] Dehumidifier (9): It adopts a semiconductor cooling chip with aluminum heat sink fins, and the dehumidification capacity reaches 200mL / day. A removable nylon dust filter (20 mesh) is installed at the air inlet and is fixed to the outside of the M20 waterproof connector (for dehumidifier) ​​(23) by a buckle.

[0055] Heater (22): PTC ceramic heating element (power 15W) is selected and installed at the bottom of the distributed module mounting plate (2). Temperature and humidity sensing and control device (7) sends control commands through RS485 bus. Heating is started when the temperature is <-10℃ and the heating rate is ≥2℃ / min.

[0056] Communication antenna (18): The lightning protection sleeve is attached to the root of the communication antenna (18), and is encapsulated with Φ25mm PVC pipe. A gas discharge tube (model GDT470-600) and a metal oxide film resistor (resistance value 10kΩ±5%) are installed in parallel inside. The protection performance is verified by a withstand voltage tester (output voltage 20kV).

[0057] Electrostatic shielding cover (15): It is made of 0.3mm thick copper mesh (1mm mesh diameter) and 0.1mm aluminum foil composite pressing, and 2mm thick ferrite absorbing sheet (model FAE-50) is pasted on the inner wall. The shielding effectiveness is tested to 62dB@1GHz using a network analyzer.

[0058] The C-shaped guide rail (16) welded to the rear of the housing mates with the clamp slider (17), suitable for installation on Φ150-300mm utility poles. During installation:

[0059] Insert the clamp slider (17) into the utility pole and adjust it to a height of 3.5m above the ground;

[0060] Secure the C-shaped guide rail (16) of the housing to the slider with M12 bolts;

[0061] The aviation sockets (12, 13) are connected to an external current transformer and power cord, and the communication antenna (18) is adjusted vertically upwards to be perpendicular to the ground.

[0062] Example 2:

[0063] This example proposes a multi-functional integrated cabinet for a distributed fault location terminal for overhead lines in power distribution networks, aiming to solve the following problems existing in the prior art:

[0064] 1) Low equipment integration: Traditional cabinets have a chaotic internal layout, with positioning terminals, power supplies, and communication modules installed separately, resulting in complex wiring and difficult maintenance;

[0065] 2) Poor environmental adaptability: Outdoor cabinets are susceptible to changes in temperature and humidity, as well as lightning interference, which reduces the signal acquisition accuracy of the fault location terminal.

[0066] 3) High operation and maintenance costs: Subsystems such as moisture protection, lightning protection, and power supply are designed independently, lack intelligent linkage control, and require frequent manual inspections.

[0067] In this example, the invention objective is achieved through three major technical means: modular structural design, intelligent environmental control, and a multi-layered protection system. The specific technical design is as follows:

[0068] In terms of modular structure design, specifically:

[0069] (1) The cooperative structure of the cabinet body (1) and the cabinet door (3)

[0070] The enclosure body is made of 304 stainless steel stamping (1.5mm thick), with a distributed module mounting plate (2) welded inside. The surface of the mounting plate is sprayed with an insulating epoxy resin coating to form an electrical installation reference surface with a partitioned layout.

[0071] Cabinet door connection: The cabinet door can be opened and closed 180° by 4 sets of stainless steel hinges (24). The hinges are evenly distributed with a spacing of 20mm. The hinge parts are embedded with silicone sealing rings to ensure smooth opening and closing and waterproof rating of IP55.

[0072] Left side area: Install lithium iron phosphate backup power supply (8), fix it with rivet screws, and reserve maintenance passage;

[0073] Right side area: Install semiconductor dehumidifier (9), with replaceable dust filter at the air inlet;

[0074] Top area: Solar panels (11) are installed at an angle and covered with a dustproof and waterproof nano-coating;

[0075] Bottom area: Equipped with aviation sockets (12, 13) and M20 waterproof connectors (14, 23) to enable quick-plug external wiring.

[0076] Metal guide rails (25, 26): Galvanized aluminum alloy guide rails with Ω-shaped cross section (cross section size 30mm×15mm), anti-loosening buckle at the top, and quick-connect terminal block integrated at the bottom.

[0077] The guide rail inside the box (25) is fixed with a grounding fault location terminal (4) and a 1P power circuit breaker (5). The terminal is connected to the zero-sequence current sensor through the CT terminal.

[0078] Cabinet door guide rail (26): Install encrypted wireless communication module (6) and temperature and humidity sensor (7), with module spacing ≥50mm to avoid electromagnetic interference.

[0079] Cable management: The cable tray (10) is a U-shaped PVC tray (50mm wide). The tray is equipped with a cable management rack. Signal cables and power cables are arranged in layers with a spacing of ≥30mm.

[0080] Regarding the control of the internal environment, the specific measures are as follows:

[0081] Sensor: Temperature and humidity sensing and control device (7) Built-in SHT45 and HDC1080 dual digital sensors, which collect data in parallel through RS485 bus, with a measurement error ≤ ±1.5%RH (humidity) / ±0.3℃ (temperature).

[0082] When the humidity is greater than 75%RH, start the semiconductor dehumidifier (9) with a dehumidification capacity of 200mL / day;

[0083] When the temperature is <-10℃, the PTC heater (22) is triggered to increase the temperature gradient (rate ≥2℃ / min).

[0084] Communication antenna (18): The root of the communication antenna (18) is fitted with a gas discharge tube (withstanding voltage 20kV) and a metal oxide film resistor (10kΩ±5%) in parallel, which discharges lightning current peak value ≥40kA;

[0085] Electrostatic shielding cover (15): It adopts a double-layer copper mesh (1mm mesh size) sandwiched with 0.1mm aluminum foil structure, and the inner wall is attached with ferrite absorbing sheet (2mm thickness). The shielding effectiveness is ≥60dB@1GHz.

[0086] Chassis door lock (21): Three-proof mechanical combination lock (waterproof, dustproof, and anti-pry) with built-in silicone sealing ring and stainless steel anti-drilling plate between the lock cylinder and the chassis;

[0087] C-shaped guide rail (16) and clamp slider (17): C-shaped steel guide rail (section 80mm×40mm) is welded to the rear end of the box body. The clamp slider is adapted to Φ150-300mm poles and towers and can be quickly fixed by M12 bolts.

[0088] Regarding power supply, specifically:

[0089] Dual power supply system: Solar panel (80W) and lithium iron phosphate battery (12.8V / 100Ah) constitute the main and backup power supply, and the MPPT controller has a conversion efficiency of ≥97%;

[0090] Overcharge and over-discharge protection: The battery pack has a built-in equalization circuit (equalization current 300mA), and the charge and discharge thresholds are set to 11V (low voltage shutdown) and 14.4V (overvoltage protection).

[0091] Improved installation efficiency: Ω-shaped guide rails and quick-connect terminals reduce equipment installation time by 60% and wiring error rate by 90%;

[0092] Enhanced environmental adaptability: In environments ranging from -40℃ to +85℃, the temperature and humidity fluctuation inside the enclosure is ≤±2℃ / ±5%RH, and the synchronization error of the fault location terminal is ≤0.8μs;

[0093] Reduced maintenance costs: The self-calibration module extends the sensor maintenance cycle to 6 months, and the solar power system reduces reliance on mains power by 80%;

[0094] Modular topology principle: Through the topology design of Ω-shaped guide rails, distributed mounting plates, and standardized interfaces, electrical equipment can be installed in a "building block" manner, solving the problem of poor expandability of traditional cabinets;

[0095] This example describes a multi-functional integrated cabinet for a ground fault distributed positioning terminal, comprising a cabinet body, cabinet door, distributed module mounting plate, ground fault distributed positioning terminal, power circuit breaker, wireless communication module, temperature and humidity sensor, backup power supply, dehumidifier, cable tray, solar panel aviation socket, wireless communication module electrostatic shielding cover, antenna, and other components. Specific features are as follows: The cabinet body internally includes the ground fault distributed positioning terminal, 1P power circuit breaker, backup power supply, dehumidifier, and heating device; the cabinet door is fixed with an encrypted wireless communication module, an encrypted wireless communication module electrostatic shielding cover, a cabinet door lock, and a temperature and humidity sensor and control device; the top of the cabinet body is equipped with a solar panel, communication antenna, and antenna pressure plate; the bottom of the cabinet body is equipped with an aviation socket (for current sampling), an aviation socket (for power supply), an M20 waterproof connector (for the communication antenna and solar panel), and an M20 waterproof connector (for the dehumidifier). It features modular installation and maintenance efficiency, temperature control and dehumidification devices that increase the enclosure's environmental adaptability and regulation capabilities, electrostatic shielding to improve electromagnetic compatibility between internal devices, and an intelligent composite power supply system that enhances the device's endurance and ability to respond to emergencies.

[0096] Preferably, the ground fault distributed positioning terminal (4) described in this example can integrate a zero-sequence current signal acquisition and analysis module to monitor the power frequency current and transient fault current through the zero-sequence current signal acquisition and analysis module to analyze the operating status of the power distribution line. In this example, after configuring a GPS timing module to achieve microsecond-level time synchronization, it can be used for comprehensive analysis of fault waveform characteristics.

Claims

1. A multifunctional integrated matching cabinet for a ground fault distributed positioning terminal, comprising a cabinet body (1), characterized in that: One side of the box body (1) is connected to the cabinet door (3) by a hinge; the box body (1) has a fixed distributed module mounting plate (2) inside, and a first metal guide rail (25), a wiring trough (10) and a heater (22) are fixed at the distributed module mounting plate (2). A ground fault distributed positioning terminal (4) and a power circuit breaker are fixed at the first metal guide rail (25). A backup power supply (8) and a dehumidifier (9) are fixed on the two sides inside the cabinet body (1); a second metal guide rail (26) and a cabinet door lock (21) are fixed on the cabinet door (3); an encrypted wireless communication module (6), a wireless communication module electrostatic shielding cover (15) and a temperature and humidity sensing and control device (7) are fixed at the second metal guide rail (26). The top of the housing body (1) is fixed with a solar panel (11), a communication antenna (18) and an antenna pressure plate (19), and the bottom of the housing body (1) is provided with an aviation socket (12) for current sampling, an aviation socket (13) for power supply, a waterproof connector (14) for communication antenna and solar panel, and a waterproof connector (23) for dehumidifier. The rear end of the box body (1) is provided with a C-shaped guide rail (16) and a clamp slider (17).

2. The multifunctional integrated matching cabinet for the ground fault distributed positioning terminal according to claim 1, characterized in that: The hinge is a stainless steel hinge (24); the power circuit breaker is a 1P power circuit breaker (5). The communication antenna and solar panel share a waterproof connector (14), and the dehumidifier uses a waterproof connector (23), both of which are M20 waterproof connectors; The solar panel (11) is installed at the top of the box body (1) in an inclined position by a bracket, with an inclination angle ranging from 15° to 45°, and the surface is covered with a dustproof and waterproof nano coating; the communication antenna and the solar panel share an M20 waterproof connector to supply power to the backup power supply (8) inside the box.

3. The multifunctional integrated matching cabinet for the ground fault distributed positioning terminal according to claim 1, characterized in that: The backup power supply (8) is a lithium iron phosphate battery pack with a built-in overcharge and over-discharge protection module, which is detachably connected to the side wall of the housing body (1) by a rivet screw.

4. The multifunctional integrated matching cabinet for the ground fault distributed positioning terminal according to claim 1, characterized in that: The dehumidifier (9) is a dehumidifier based on semiconductor condensation dehumidification. It has a replaceable dust filter at the M20 waterproof connector at the inlet and outlet of the dehumidifier. The start and stop of the dehumidifier is controlled by the temperature and humidity sensing and control device (7) connected to it.

5. The multifunctional integrated matching cabinet for the ground fault distributed positioning terminal according to claim 1, characterized in that: Both the first and second metal guide rails are zinc-plated aluminum alloy guide rails with an Ω-shaped cross-section. The top of the guide rail is equipped with an anti-disengagement buckle, and the bottom of the guide rail is equipped with a quick-connect terminal.

6. The multifunctional integrated matching cabinet for the ground fault distributed positioning terminal according to claim 1, characterized in that: The communication antenna (18) is fitted with a lightning protection sleeve at its base. The lightning protection sleeve is composed of a gas discharge tube and a metal oxide film resistor connected in parallel. The lightning protection sleeve has an impact voltage of ≥20kV. The lightning protection sleeve is fixed to the main body (1) of the box by the antenna pressure plate (19).

7. The multifunctional integrated matching cabinet for the ground fault distributed positioning terminal according to claim 1, characterized in that: The electrostatic shielding cover (15) of the wireless communication module is a double-layer copper mesh sandwiched with aluminum foil structure. The inner wall of the electrostatic shielding cover of the wireless communication module is covered with wave-absorbing material, and the shielding effectiveness of the electrostatic shielding cover of the wireless communication module is ≥60dB.

8. The multifunctional integrated matching cabinet for the ground fault distributed positioning terminal according to claim 1, characterized in that: The chassis door lock (21) is a three-proof mechanical combination lock, and the lock cylinder is equipped with a silicone sealing ring.

9. The multifunctional integrated matching cabinet for the ground fault distributed positioning terminal according to claim 1, characterized in that: The cabinet door lock is equipped with a concealed hinge limiter to restrict the opening and closing angle of the cabinet door to 180°.

10. The multifunctional integrated matching cabinet for the ground fault distributed positioning terminal according to claim 1, characterized in that: The temperature and humidity sensing and control device (7) comprises a double-redundant digital temperature and humidity sensor, a fuzzy PID control unit and a self-calibration module, and is used for controlling the start state and stop state of the heater (22) and the dehumidifier (9).

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