Novel protection system based on secondary screen cabinet of transformer substation and use method

Abstract

The invention discloses a novel protection system based on a transformer substation secondary screen cabinet and a use method, and belongs to the technical field of transformer substation secondary screen cabinet protection. The novel protection system based on the secondary screen cabinet of the transformer substation comprises a top protection module and a power supply protection module, wherein the top protection module is connected with the power supply protection module through an adjustable plate; the top protection module is directly located on the top of the secondary screen cabinet. The top protection module comprises a top plate, side plates, supporting plates, supporting feet, upper barrier strips, folded edges and lower barrier strips. Side plates are arranged on the front side and the rear side below the top plate, supporting plates are arranged on the inner sides of the two side plates, supporting feet are arranged below the supporting plates, and lower blocking strips are arranged on the left side and the right side below the top plate. Folded edges are arranged on the left side and the right side of the top of the top plate; the device has the functions of preventing water, dust, rats, snakes, birds, insects and other small animals possibly entering a main control room, and preventing mistaken touch, mistaken touch, misoperation and the like of operators.

Description

Technical Field

[0001] The present invention relates to the technical field of secondary panel cabinet protection of a transformer substation, and in particular to a novel protection system based on a secondary panel cabinet of a transformer substation and a use method thereof. Background Art

[0002] Among the substation operating equipment, the substation secondary panel cabinet is a device that carries the secondary equipment. Due to its lack of protection measures, once a short circuit or grounding occurs, it will cause the busbar protection and line protection to malfunction or refuse to operate, seriously endangering the safe and stable operation of the power grid.

[0003] At present, the top of the panel cabinet in the main control room is directly exposed to the air. During the rainy season, if water seepage and leakage occur in the main control room, rainwater will drip directly onto the busbar on the top of the panel cabinet, causing a short circuit in the line, and then causing a fire or power outage in the entire station.

[0004] The equipment in the screen cabinet is all precision equipment. Due to the special location of the site, it is not easy to clean. Dust accumulates and enters the precision equipment, affecting its normal operation.

[0005] Currently, most substations are unmanned. The main control room has a constant temperature and humidity, and is seriously infested with rats. Once they gnaw on the cables and cause a short circuit, very serious consequences will occur.

[0006] The old substations carry a large number of small busbars. If operating personnel or various small animals accidentally touch, bump into or misoperate the busbar and cause a short circuit or DC grounding, or if the ceiling of the main control room cracks and leaks, and water drips onto the energized busbar, it may cause the power circuit breaker to trip and a large number of secondary equipment in the station to lose power, resulting in the loss of protection of primary components such as lines, transformers, and busbars in operation, and there is a risk of over-tripping. DC grounding may cause the operating switches to malfunction or refuse to operate, affecting the stability of the regional power grid.

[0007] Due to the importance of the equipment in the secondary cabinet of the substation and the complexity of its operating environment, the protection of the secondary cabinet has always been limited to a layer of iron cover protection for the small busbar on the top of the cabinet. The shape is simple and the protection ability is weak. In addition, since it is made of metal and the small busbar on the top of the cabinet is energized, the installation is somewhat dangerous. Summary of the invention

[0008] In order to solve the deficiencies in the prior art, the present invention provides a novel protection system based on a secondary panel cabinet of a substation and a use method thereof.

[0009] The present invention adopts the following technical solution:

[0010] A new type of protection system based on the secondary panel cabinet of a substation includes: a top protection module, a power protection module and an adjustable plate; the top protection module and the power protection module are connected through the adjustable plate to protect the busbar on the top of the secondary panel cabinet in the main control room of the substation and the precision equipment in the cabinet; the top protection module is directly located on the top of the secondary panel cabinet, and the top protection module includes: a top plate, side plates, a support plate, a support foot, an upper stop bar, a folding edge and a lower stop bar; side plates are arranged on the front and rear sides below the top plate, a support plate is arranged on the inner side of the side plate, a support foot is arranged below the support plate, and a support plate is arranged on the left and right sides below the top plate. A lower baffle is provided; an upper baffle is provided on the outermost periphery of the top of the top plate, and folding edges are provided on the left and right sides of the top of the top plate; the power protection module includes: a button device, a torque hinge, a frame plate and an opening and closing plate; an embedding groove is provided in the middle of the frame plate, and the opening and closing plate can be embedded in the embedding groove; button devices are provided at equal intervals on the lower outer surface of the opening and closing plate, and torque hinges are provided at equal intervals on the upper outer surface of the opening and closing plate, the torque hinge connects the opening and closing plate to the frame plate, and the opening and closing plate can rotate around the torque hinge; the opening and closing plate and the frame plate are located at the rear of the secondary cabinet by the power protection module, which is used to protect the power supply of the cabinet.

[0011] According to the novel protection system based on the secondary cabinet of the substation, the support plate is divided into a front support plate and a rear support plate. The height of the front and rear support plates is adjusted according to the front and rear heights of the cabinet, and the height difference between the front and rear support plates forms an inclined setting in which the top plate is low in the front and high in the back.

[0012] According to the novel protection system based on the secondary panel cabinet of the substation, the top protection module is connected to the power protection module through an adjustable plate; the top plate is made of a whole piece of material without any seams; the top plate serves as the main body of the device protection, and its length and width both exceed the length and width of the panel top, and is used to fully cover the panel top horizontally to protect it.

[0013] According to the novel protection system based on the secondary panel cabinet of the substation, the upper baffle forms a surrounding perimeter protection on the upper layer of the top plate. After the water flow on the top plate converges at the forefront, the water is discharged from the drainage holes reserved at the upper baffle, and raindrops are prevented from splashing around when falling.

[0014] According to the novel protection system based on the secondary panel cabinet of the substation, the lower baffle and the side plate form a surrounding perimeter protection under the top plate to prevent small animals from entering; the upper perimeter protection and the lower perimeter protection realize vertical full coverage protection for the panel top.

[0015] According to the novel protection system based on the secondary panel cabinet of the substation, the support legs are located at the four corners of the panel top and can support the top plate. The side plates are connected to the support legs. The side plates are divided into front side plates and rear side plates, which are respectively located at the front and rear of the panel top. The front and rear side plates are tightly combined with the front and rear of the panel top to form a U-shaped slot with the top plate.

[0016] According to the novel protection system based on the secondary cabinet of the substation, the secondary cabinets of the substation are arranged in rows, and the tops of the cabinets are connected by small busbars. When the top protection modules are used in groups, the gaps formed between the modules are protected by folded edges to prevent water droplets from sliding from the gaps where the modules are connected to the inside of the cabinets.

[0017] According to the novel protection system based on the secondary panel cabinet of the substation, the operator flips the opening and closing plate up and down through the button device, which is composed of double-layer buttons to prevent the opening and closing plate from exceeding the frame plate and touching the power supply when flipping down, and various identification plates can be hung.

[0018] According to the novel protection system based on the secondary panel cabinet of the substation, the opening and closing plate can be flipped freely, the flipping angle is 0 to 180 degrees, and the opening and closing plate can be maintained at any angle and automatically hover when opening and closing.

[0019] An operation method of a new protection system based on a secondary panel cabinet of a substation comprises the following steps:

[0020] Installation: Operators work together to lift the top plate of the top protection module. When the height of the lifting is higher than the highest point of the top of the screen, align the support plate vertically with the edge of the screen cabinet and place it directly on the top of the secondary screen cabinet. Install the adjustable plate and connect the power protection module.

[0021] Disassembly: First remove the adjustable plate and take away the power protection module. The operators work together to lift the top plate of the top protection module. When the height of the lifting is higher than the highest point of the top of the screen, the top protection module can be directly taken away.

[0022] Operation: When the operator needs to operate the power supply of the panel cabinet, the power protection module holds the button device and flips the opening and closing plate upwards to a maximum of 180 degrees. After opening the opening and closing plate, the power supply of the panel cabinet can be operated through the frame plate. After the operation, flip the opening and closing plate downward until the button device is connected to the frame plate. At this time, the opening and closing plate is just on the same horizontal plane as the frame plate to prevent the opening and closing plate from touching the power supply of the panel cabinet.

[0023] Compared with the prior art, the beneficial effects of the present invention include at least:

[0024] (1) This protection system can provide a stable and reliable environment for the operation of the busbar on the top of the secondary panel cabinet, the precision equipment in the cabinet and the power supply behind the cabinet, ensuring the safe and stable operation of the substation, improving the overall operation stability of the power grid, and protecting the lives and property of the people;

[0025] (2) This protection system uses flame-retardant organic glass, which has stable material performance, flame retardancy, insulation and high light transmittance, and is not easy to deform at high temperatures; the insulating material can ensure that the equipment will not short-circuit or ground during installation, disassembly and operation; it has good light transmittance, and the cabinet top situation can be directly observed through the cover;

[0026] (3) The top protection module designed in this application has the functions of waterproof, dustproof, and anti-rat, snake, bird, insect and other small animals that may enter the main control room;

[0027] (4) The top protection module and power protection module designed in this application have the function of preventing operators from accidentally touching, bumping, or operating the module, thus achieving all-round protection;

[0028] (5) A ventilation gap is left at the connection between the protection system and the bottom of the screen cabinet, which also has functions such as heat dissipation and ventilation. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the secondary panel cabinet of the substation in the present invention;

[0030] Figure 2 It is a schematic diagram of the secondary screen cabinet protection system after installation in the present invention;

[0031] Figure 3 It is a schematic diagram of the connection between the secondary screen cabinet protection system and the protection system in the present invention;

[0032] Figure 4 It is a schematic diagram of the power supply protection module of the secondary cabinet protection system in the present invention before installation;

[0033] Figure 5 It is a schematic diagram of the power protection module of the secondary cabinet protection system after installation in the present invention;

[0034] Figure 6 It is a schematic diagram of the secondary cabinet protection system after the power protection module of the present invention is turned on;

[0035] Figure 7 It is a schematic diagram of the secondary screen cabinet protection system in the present invention.

[0036] In the figure: 1. Top protection module; 101. Top plate; 102. Side plate; 103. Support plate; 104. Support foot; 105. Upper baffle; 106. Folding edge; 107. Lower baffle; 2. Power protection module; 201. Button device; 202. Torque hinge; 203. Frame plate; 204. Opening and closing plate; 3. Adjustable plate. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical scheme and advantages of the present invention clearer, the technical scheme of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The embodiments described in this application are only part of the embodiments of the present invention, not all of them. Based on the spirit of the present invention, other embodiments obtained by ordinary technicians in this field without creative work are all within the scope of protection of the present invention.

[0038] like Figure 1-Figure 7 As shown, the present application provides a new protection system based on the secondary panel cabinet of the substation, which is used to protect the top busbar of the secondary panel cabinet in the main control room of the substation, the precision equipment in the cabinet and the power supply behind the cabinet, including: a top protection module 1 and a power protection module 2, and the top protection module 1 and the power protection module 2 are connected through an adjustable plate 3.

[0039] like Figure 7 As shown, the top protection module 1 is directly located on the top of the secondary cabinet, and is used to protect the small busbar on the top of the cabinet and the precision equipment in the cabinet. The top protection module 1 includes: a top plate 101, a side plate 102, a support plate 103, a support leg 104, an upper stop bar 105, a folding edge 106 and a lower stop bar 107; side plates 102 are arranged on the front and rear sides below the top plate 101, support plates 103 are arranged on the inner sides of the two side plates 102, support legs 104 are arranged below the support plates 103, and lower stop bars 107 are arranged on the left and right sides below the top plate 101; an upper stop bar 105 is arranged on the outermost periphery of the top of the top plate 101, and folding edges 106 are arranged on the left and right sides of the top of the top plate 101;

[0040] The top plate 101 is the main contact surface for receiving rainwater and dust, and is made of a whole piece of material without any joints. The top plate 101 is the main body of the device protection, and its length and width are both larger than the length and width of the screen top, so as to achieve full horizontal coverage protection for the screen top.

[0041] The support plate 103 is divided into a front support plate and a rear support plate. The height of the front and rear support plates is adjusted according to the front and rear heights of the screen cabinet. The height difference between the front and rear support plates forms an inclined setting of the top plate 101 with the front lower and the back higher. According to the law that water flows from high to low, no matter where the water drops fall on the top plate, they will eventually gather at the forefront of the top plate.

[0042] The upper baffle 105 forms a surrounding perimeter protection on the upper layer of the top plate 101. On the one hand, after the water flow on the top plate 101 converges at the forefront, the water is discharged from the drainage holes reserved at the upper baffle 105. On the other hand, it can also prevent raindrops from splashing around when they fall; the lower baffle 107 and the side plate 102 form a surrounding perimeter protection on the lower layer of the top plate 101 to prevent rats, birds, moths and other small animals from entering; the upper perimeter protection and the lower perimeter protection achieve vertical full coverage protection for the screen top.

[0043] The support legs 104 are located at the four corners of the screen top, which can support the top plate 101 more stably. The side panels 102 are connected to the support legs 104. The side panels 102 are divided into front side panels and rear side panels, which are respectively located at the front and rear of the screen top. The front and rear side panels are tightly combined with the front and rear of the screen top to form a U-shaped slot with the top plate 101, which can not only provide protection, but also make the top protection module 1 sit more firmly on the top of the screen cabinet, and the module will not slide and tilt due to the front and rear forces.

[0044] The secondary panels of the substation are usually arranged in rows, and the panel tops are connected by small busbars. When the top protection module 1 is used in groups, the gaps formed between the modules are protected by folded edges 106 to increase privacy and prevent water droplets from sliding from the gaps where the modules are connected to the inside of the panel.

[0045] All components of the top protection module are made of the same material and have high transparency. Operators can see the screen top directly from any angle above the secondary screen cabinet, making it convenient for operators to check for safety hazards on the screen top.

[0046] like Figure 7 As shown, the power protection module 2 includes: a button device 201, a torque hinge 202, a frame plate 203 and an opening and closing plate 204. The button device 201 is connected to the opening and closing plate 204, which is convenient for operators to flip the opening and closing plate 204 up and down. The button device 201 is located at the lower edge of the opening and closing plate 204 and is composed of double-layer buttons to prevent the frame plate 203 from exceeding the power source when flipping down, and various identification plates can also be hung. The torque hinge 202 connects the opening and closing plate 204 and the frame plate 203, so that the opening and closing plate 204 can be freely flipped, and the flipping angle is 0 degrees to 180 degrees, and the opening and closing plate 204 can be maintained at any angle and automatically hover when opening and closing; an embedding groove is provided in the middle of the frame plate 203, and the opening and closing plate 204 can be embedded in the embedding groove; the opening and closing plate 204 and the frame plate 203 are located behind the secondary screen cabinet by the power protection module 2, which mainly protects the power supply of the screen cabinet to prevent water droplets or other foreign objects from entering the power supply and causing a short circuit, and can effectively prevent safety accidents caused by accidental touch, accidental contact and misoperation by staff.

[0047] The adjustable plate 3 connects the power protection module 2 with the side plate 102 of the top protection module 1, and the height can be adjusted arbitrarily. The top protection module 1 can be used alone without the power protection module 2, and the system has a high degree of freedom.

[0048] Due to the rapid development of modern science and technology, the demand for electricity is increasing year by year, and the replacement and transformation speed of secondary panels in substations is also very frequent. Therefore, the disassembly of the new protection system is also very frequent, and the small busbars on the top of the panel are all live devices. Therefore, the new protection system is fully combined with the on-site work content and dangerous points when used. In order not to increase the operating procedures and operating risks of the operators, the entire system uses insulating materials. Whether it is installation or disassembly, the operators do not need to directly contact the panel cabinets.

[0049] The present application also provides a method for using a new type of protection system based on a substation secondary cabinet, comprising the following steps:

[0050] Installation: Operators work together to lift the top plate 101 of the top protection module 1. When the height of the lifting is higher than the highest point of the top of the screen by the side plate 102, align the support plate 103 vertically with the edge of the screen cabinet and place it directly on the top of the secondary screen cabinet. Install the adjustable plate 3 and connect the power protection module 2.

[0051] Disassembly: first remove the adjustable plate 3, take away the power protection module 2, and the operators cooperate to lift the top plate 101 of the top protection module 1. When the lifting height is higher than the highest point of the screen top by the side plate 102, the top protection module 1 can be directly removed.

[0052] Operation: When the operator needs to operate the power supply of the screen cabinet, the power protection module 2 holds the button device 201 and flips the opening and closing plate 204 upward to a maximum of 180 degrees. After opening the opening and closing plate 204, the power supply of the screen cabinet can be operated through the frame plate 203. After the operation is completed, the opening and closing plate 204 is flipped downward until the button device 201 is connected to the frame plate 203. At this time, the opening and closing plate 204 is just in the same horizontal plane as the frame plate 203 to prevent the opening and closing plate 204 from touching the power supply of the screen cabinet.

[0053] All components are made of insulating materials to effectively prevent short circuits during installation. Water retaining strips are set between adjacent cabinet protection systems to prevent water droplets from dripping from the gaps. It can achieve a 100% waterproof effect. The top of the device is cut from a whole piece of material to prevent foreign objects from directly contacting the cabinet top, ensuring the safe and stable operation of the equipment in the cabinet.

[0054] The whole is made of flame-retardant plexiglass, which has excellent flame-retardant properties and is not easily deformed at high temperatures. If a short circuit occurs due to a loose connection or overload on the busbar on the top of the panel cabinet, the system can effectively isolate the fault and control the scope of the fire and the loss within a certain range before the maintenance personnel arrive at the scene to ensure that it will not cause a secondary fire.

[0055] With excellent waterproof performance, a protection system is established for each screen cabinet. The waterproof performance of the gaps between adjacent screen cabinets is also fully considered. A water retaining strip is added at the connection of the adjacent screen cabinet protection systems to establish protection between systems, eliminate loopholes, and achieve the purpose of 100% waterproofing.

[0056] Combined with the actual situation on site, the unique design of the appearance, through material selection, cutting, secondary processing and other work, not only enhances the practicality, but also saves material and labor installation costs.

[0057] The adopted plexiglass material has high overall light transmittance. The operation and maintenance personnel can directly check the equipment on the top of the cabinet through the protective cover and can directly wipe the dust accumulated on the top of the protection system to prevent dust from entering the cabinet and generating static electricity that affects the operation of the secondary screen cabinet.

[0058] Power supply protective covers of different specifications can be customized for the power supply behind the screen cabinet. For the installed red curtain, installation space can be reserved to avoid space conflict.

[0059] Since the panel cabinets in the main control room of the substation involve multiple disciplines and have undergone many renovations and upgrades, the indoor panel cabinets are diverse in form and the cabinet top conditions are complicated. There are special cases such as shared small busbars for protecting the panel cabinet busbars, iron protective covers, double-layer elevated busbars, communication antennas, etc. There are also different sizes of panel cabinets, including 600MM*600MM, 800MM*600MM, 800MM*1000MM and other specifications. In actual applications, different models can be customized for special cases such as different panel cabinet sizes and the height of the busbar on the top of the panel cabinet.

[0060] On the basis of all-round protection, the heat dissipation performance of the protection system is also fully considered. Because the secondary equipment in the secondary screen cabinet will generate heat during operation, if the equipment is fully enclosed for protection, the accumulated heat will affect the operation of the secondary equipment. Therefore, in order to address the heat dissipation problem, a breathable gap is left at the connection between the protection system and the bottom of the screen cabinet to ensure that the heat dissipation performance of the secondary screen cabinet is not affected.

[0061] The material is sturdy and durable, the structure is simple, and the installation is easy. After the product is assembled, it can be directly installed on the top of the screen cabinet without the need for secondary assembly and fixation.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents, and any modifications or equivalent replacements that do not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A new protection system based on the secondary panel cabinet of a substation, including: A top protection module (1), a power protection module (2) and an adjustable plate (3); the top protection module (1) and the power protection module (2) are connected via the adjustable plate (3) and are used to protect the top busbar of the secondary panel cabinet in the main control room of the substation and the precision equipment in the cabinet; the characteristics are: The top protection module (1) is directly located on the top of the secondary screen cabinet, and the top protection module (1) comprises: a top plate (101), a side plate (102), a support plate (103), a support leg (104), an upper stop bar (105), a folding edge (106) and a lower stop bar (107); side plates (102) are arranged on the front and rear sides below the top plate (101), a support plate (103) is arranged on the inner side of the side plate (102), a support leg (104) is arranged below the support plate (103), and lower stop bars (107) are arranged on the left and right sides below the top plate (101); an upper stop bar (105) is arranged on the outermost periphery of the top of the top plate (101), and folding edges (106) are arranged on the left and right sides of the top of the top plate (101); The power protection module (2) comprises: a button device (201), a torque hinge (202), a frame plate (203) and an opening and closing plate (204); an embedding groove is provided in the middle of the frame plate (203), and the opening and closing plate (204) can be embedded in the embedding groove; button devices (201) are arranged at equal intervals on the lower outer surface of the opening and closing plate (204), and torque hinges (202) are arranged at equal intervals on the upper outer surface of the opening and closing plate (204); the torque hinge (202) connects the opening and closing plate (204) and the frame plate (203), and the opening and closing plate (204) can rotate around the torque hinge (202); the opening and closing plate (204) and the frame plate (203) are located at the rear of the secondary cabinet by the power protection module (2) and are used to protect the power supply of the cabinet.

2. According to claim 1, a new type of protection system based on the secondary cabinet of the substation is characterized in that: The support plate (103) includes a front support plate and a rear support plate. The height of the front support plate and the rear support plate is adjusted according to the front and rear heights of the cabinet. The height difference between the front support plate and the rear support plate forms an inclined setting of the top plate (101) with the front lower and the rear higher.

3. According to claim 1, a new type of protection system based on the secondary cabinet of a substation is characterized in that: The top plate (101) is made of a whole piece of material without any joints; the top plate (101) serves as the main body of the device protection, and its length and width both exceed the length and width of the screen top, and is used for fully covering and protecting the screen top in the horizontal direction.

4. According to claim 1, a new type of protection system based on a secondary cabinet of a substation is characterized in that: The upper baffle (105) forms a surrounding perimeter protection on the upper layer of the top plate (101). After the water flow on the top plate (101) converges at the front edge, the water is discharged from the drainage holes reserved at the upper baffle (105), and raindrops are prevented from splashing around when falling.

5. According to claim 1, a new type of protection system based on the secondary cabinet of a substation is characterized in that: The lower barrier strip (107) and the side plate (102) form a surrounding perimeter protection at the lower layer of the top plate (101) to prevent small animals from entering; the upper perimeter protection and the lower perimeter protection vertically fully cover the protective screen top.

6. According to claim 1, a new type of protection system based on the secondary cabinet of a substation is characterized in that: The support legs (104) are located at the four corners of the screen top and can support the top plate (101). The side plates (102) are connected to the support legs (104). The side plates (102) are divided into a front side plate and a rear side plate, which are respectively located at the front and rear of the screen top. The front and rear side plates are tightly combined with the front and rear of the screen top to form a U-shaped slot with the top plate (101).

7. According to claim 1, a new type of protection system based on the secondary cabinet of a substation is characterized in that: The secondary panels of the substation are arranged in rows, and the panel tops are connected via small busbars. When the top protection modules (1) are used in groups, the gaps formed between the modules are protected by folded edges (106) to prevent water drops from sliding from the gaps where the modules are connected to the inside of the panel cabinets.

8. According to claim 1, a new type of protection system based on a secondary panel cabinet of a substation is characterized in that: The operator turns the opening and closing plate (204) up and down through the button device (201), which is composed of double-layer buttons; the button device (201) is used to prevent the opening and closing plate (204) from exceeding the frame plate (203) and touching the power supply when turning downward, and various identification plates can be hung.

9. According to claim 1, a new type of protection system based on the secondary cabinet of a substation is characterized in that: The opening and closing plate (204) can be turned freely, and the turning angle is 0 to 180 degrees. When the opening and closing plate (204) is opened and closed, it can be kept at any angle and automatically hover.

10. A method for using a new type of protection system based on a secondary panel cabinet of a substation, characterized in that: A novel protection system based on a substation secondary cabinet according to any one of claims 1 to 9 comprises the following steps: Installation: The operators work together to lift the top plate (101) of the top protection module (1). When the height of the lifting is higher than the highest point of the top of the screen by the side plate (102), the support plate (103) is vertically aligned with the edge of the screen cabinet and can be directly placed on the top of the secondary screen cabinet, and the adjustable plate (3) is installed, and then the power protection module (2) is connected; Disassembly: first remove the adjustable plate (3), take away the power protection module (2), and the operators work together to lift the top plate (101) of the top protection module (1). When the height of the lifting is higher than the highest point of the top of the screen by the side plate (102), the top protection module (1) can be directly taken away; Operation: When the operator of the power protection module (2) needs to operate the power supply of the cabinet, the operator holds the button device (201) and flips the opening and closing plate (204) upward to a maximum of 180 degrees. After opening the opening and closing plate (204), the power supply of the cabinet can be operated through the frame plate (203). After the operation is completed, the opening and closing plate (204) is flipped downward until the button device (201) is connected to the frame plate (203). At this time, the opening and closing plate (204) is just at the same horizontal plane as the frame plate (203), preventing the opening and closing plate (204) from touching the power supply of the cabinet.

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