Anti-islanding protection device for preventing overheating

Abstract

The utility model discloses an anti-islanding protection device for preventing overheating, and relates to the technical field of electrical switch equipment. The device comprises an outer fixing box, an exhaust box, mounting rails, a fixing plate and an exhaust fan, the center of the top of the outer fixing box is fixedly communicated with the exhaust fan, a plurality of horizontally-arranged mounting rails are fixed to the rear side face of the inner wall of the outer fixing box, and a plurality of horizontally-arranged ventilation openings are formed in the upper portions of the two sides of the outer fixing box. Exhaust boxes are fixed to the outer sides of the ventilation openings in the outer side of the outer fixing box, a fixing plate is arranged on the front side of the uppermost mounting rail, and an anti-islanding switch is fixed to the middle of the top of the fixing plate. By arranging the outer fixing box, the exhaust box, the mounting track, the fixing plate and the exhaust fan, the anti-islanding protection device solves the problems that the position of the switch plectrum of the anti-islanding protection device is easy to leak electric arc, the hand of a worker is easy to be too close to generate potential safety hazards, and rainwater is easy to enter the protection device to generate potential safety hazards.

Description

Technical Field

[0001] This utility model belongs to the field of electrical switchgear technology, and in particular relates to an anti-islanding protection device to prevent overheating. Background Technology

[0002] Anti-islanding protection devices are key safety equipment in distributed generation systems, primarily used to prevent the "islanding effect" during grid outages, thereby ensuring personnel safety and stable equipment operation. During operation, anti-islanding protection devices may generate heat due to electronic component power consumption (such as relay breaking current and power module conversion losses), excessively high ambient temperature, or poor ventilation. Excessive heat can lead to malfunctions, insulation aging, or shortened equipment lifespan. However, in practical use, it still has the following drawbacks:

[0003] When the anti-islanding protection device is in operation during a power outage, the operator needs to disconnect the power first before carrying out electrical maintenance work. However, if the operator directly activates the protection device during the power outage, it is easy to cause electric shock accidents due to arc leakage, which affects the safety of use.

[0004] Secondly, during the operation of the anti-islanding protection device, air needs to be blown to cool the switch in order to prevent it from overheating. However, during the blowing process, air is drawn in from the outside, and as the operation continues, rainwater is easily drawn in. Furthermore, the rainwater falls onto the enclosure and can easily enter the enclosure through the exhaust port, affecting the safety of the protection device. Utility Model Content

[0005] The purpose of this utility model is to provide an anti-islanding protection device to prevent overheating. By setting up an external fixed box, an exhaust box, a mounting rail, a fixing plate, and an exhaust fan, it solves the problems of easy leakage of electric arc at the switch position of the anti-islanding protection device, easy for workers' hands to get too close, which poses a safety hazard, and easy for rainwater to enter the protection device, which also poses a safety hazard.

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0007] This utility model is an anti-islanding protection device to prevent overheating, including an outer fixed box, an exhaust box, mounting rails, a fixing plate, and an exhaust fan. An exhaust fan is fixedly connected to the top center of the outer fixed box. Several horizontally arranged mounting rails are fixed to the rear side of the inner wall of the outer fixed box. Several horizontally arranged ventilation openings are opened on the upper parts of both sides of the outer fixed box. An exhaust box is fixed to the outside of each ventilation opening on the outer side of the outer fixed box. A fixing plate is located on the front side of the uppermost mounting rail. An anti-islanding switch is fixed to the top center of the fixing plate. An insulating sleeve is fixed to the outside of the lever of the anti-islanding switch. An insulating block is fixed to the front end of the insulating sleeve. Pull rods are fixed to both sides of the insulating block. During operation, the mounting rails and fixing plate are fixed within the outer fixed box. The exhaust box expels air entering the outer fixed box and prevents rainwater from splashing into the outer fixed box. The fixing plate is installed on the mounting rails, and the anti-islanding switch is installed on the fixing plate.

[0008] Furthermore, the front of the outer fixed box is rotatably connected to a front door, and the exhaust box is open on both the side and bottom of the outer fixed box. The front door on the outer fixed box closes its front side, and the bottom of the exhaust box discharges air.

[0009] Furthermore, three equally spaced mounting plates are fixed to the rear side of the fixing plate, and mounting bolts are inserted through the upper part of each mounting plate. The mounting bolts are screwed into the mounting holes on the mounting track and tightened. The mounting plates and mounting bolts on the fixing plate are installed on the mounting track.

[0010] Furthermore, a warning light is fixed to the top of the mounting plate on one side of the anti-islanding switch, and a protective resistor is fixed to the top of the mounting plate on the side of the anti-islanding switch away from the warning light. The warning light on the anti-islanding switch indicates whether the anti-islanding switch is de-energized.

[0011] Furthermore, the protective resistor and the warning light are connected in series, and the protective resistor and the warning light are connected in series with the anti-islanding switch. When the warning light is turned on, it indicates whether the anti-islanding switch is de-energized.

[0012] Furthermore, the top of the exhaust fan is fixed with fixed rods in a circular array, and the top of all the fixed rods are fixed with a protective cover. After the exhaust fan draws the air in the protective cover, it blows it onto the anti-islanding switch on the fixed plate.

[0013] This utility model has the following beneficial effects:

[0014] This invention solves the problems of electric arc leakage at the switch lever position of the anti-islanding protection device and the safety hazard caused by workers' hands being too close to the switch by setting up an external fixing box, an exhaust box, a mounting rail, and a fixing plate. After opening the lock on the front door of the external fixing box, the top of the fixing plate is facing upwards. The three mounting plates on the back of the fixing plate are then attached to the mounting rail inside the external fixing box. The mounting bolts are then inserted into the mounting plates, and the self-tapping screws are screwed into the mounting holes on the mounting rail. When power-off is required during operation, pulling the lever moves the insulating block and insulating sleeve, changing the opening and closing of the anti-islanding switch. Observe the opening and closing of the warning light. When the warning light is on, it indicates that the circuit is still powered; when the warning light is off, it confirms that the islanding circuit is de-energized. This design allows operators to keep their hands further away from the switch, making it safer to use.

[0015] This invention solves the problem of rainwater easily entering the anti-islanding protection device and causing safety hazards by setting up an external fixing box, an exhaust box, and an exhaust fan. The exhaust fan draws air from the protective cover above the device and delivers it to the external fixing box to cool the anti-islanding switch and prevent it from overheating. The fixing rod connects the exhaust fan and the protective cover, which protects the exhaust fan from falling directly onto it. The exhaust box prevents rainwater and debris from splashing into the ventilation openings on the external fixing box and entering the device, thus preventing safety hazards. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A three-dimensional view of the assembly structure of an anti-islanding protection device to prevent overheating;

[0018] Figure 2 This is a three-dimensional structural view of the external fixing box;

[0019] Figure 3 This is a three-dimensional structural diagram of the exhaust box;

[0020] Figure 4 A three-dimensional structural diagram of the track installation area;

[0021] Figure 5 This is a three-dimensional structural diagram of the fixed plate;

[0022] Figure 6 This is a 3D structural diagram of the exhaust fan.

[0023] Figure label:

[0024] 1. External mounting box; 101. Ventilation opening; 102. Front door; 2. Exhaust box; 3. Mounting rail; 4. Mounting plate; 401. Anti-islanding switch; 402. Insulating sleeve; 403. Insulating block; 404. Pull rod; 405. Warning light; 406. Protective resistor; 407. Mounting plate; 408. Mounting bolt; 5. Exhaust fan; 501. Fixing rod; 502. Protective cover. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model. Specific Implementation Example 1

[0026] Please see Figures 1-5 This utility model is an anti-islanding protection device to prevent overheating, including an outer fixing box 1, an exhaust box 2, a mounting rail 3, a fixing plate 4, and an exhaust fan 5. The exhaust fan 5 is fixedly connected to the top center of the outer fixing box 1. The outer fixing box 1 fixes the mounting rail 3 and the fixing plate 4 within it, and the exhaust fan 5 blows air into the outer fixing box 1. Several horizontally arranged mounting rails 3 are fixed on the rear side of the inner wall of the outer fixing box 1. The mounting rails 3 are used to install electrical equipment during operation. Several horizontally arranged ventilation openings 101 are opened on the upper part of both sides of the outer fixing box 1. Air entering the outer fixing box 1 is discharged through the ventilation openings 101. An exhaust box 2 is fixed to the outside of the ventilation openings 101 on the outside of the outer fixing box 1. The exhaust box 2 is used to prevent rainwater and debris from splashing into the outer fixing box 1. A fixing plate 4 is set on the front side of the uppermost mounting rail 3. The fixing plate 4... Anti-islanding switch 401 and other anti-islanding power failure electrical equipment are fixed on it. Anti-islanding switch 401 is fixed in the middle of the top of the fixing plate 4. Anti-islanding switch 401 is used to control the opening and closing of the islanded circuit and the main power grid. An insulating sleeve 402 is fixed to the outside of the switch of anti-islanding switch 401. An insulating block 403 is fixed to the front end of the insulating sleeve 402. Pull rods 404 are fixed on both sides of the insulating block 403. The insulating sleeve 402 connected to the switch switch of anti-islanding switch 401 insulates the insulating block 403 from anti-islanding switch 401. The insulating block 403 is connected to the pull rod 404, which further insulates the pull rod 404 from the insulating block 403. During the power failure operation, the operator pulls the pull rod 404 by hand, which moves the insulating block 403 and the pull rod 404 to move the switch of anti-islanding switch 401 and change the opening and closing of the circuit of anti-islanding switch 401.

[0027] Specifically, the front door 102 is rotatably connected to the front of the outer fixed box 1, and the exhaust box 2 is open on both the side and bottom of the outer fixed box 1. The front door 102 on the outer fixed box 1 closes the front side, and the exhaust box 2 outputs the air discharged from the vent 101.

[0028] Furthermore, three equally spaced mounting plates 407 are fixed to the rear side of the fixing plate 4. Mounting bolts 408 are inserted through the upper part of each mounting plate 407. The mounting bolts 408 are screwed into the mounting holes on the mounting rail 3 and tightened. The mounting bolts 408 are self-tapping screws. After the mounting bolts 408 are screwed into the mounting rail 3, the fixing plate 4 is installed.

[0029] Furthermore, a warning light 405 is fixed to the top of the mounting plate 4 on one side of the anti-islanding switch 401, and a protective resistor 406 is fixed to the top of the mounting plate 4 on the side of the anti-islanding switch 401 away from the warning light 405. The warning light 405 on the anti-islanding switch 401 indicates whether the anti-islanding switch 401 is de-energized.

[0030] Furthermore, the protective resistor 406 and the warning light 405 are connected in series, and the protective resistor 406 and the warning light 405 are connected in series with the anti-islanding switch 401. The protective resistor 406 protects the warning light 405 and the anti-islanding switch 401.

[0031] The operation process of this embodiment is as follows: During operation, the door lock on the front door 102 of the outer fixed box 1 is opened, and then the top of the fixed plate 4 is turned upward. The three mounting plates 407 on the rear side of the fixed plate 4 are attached to the mounting rail 3 inside the outer fixed box 1. Then, the mounting bolts 408 are inserted into the mounting plates 407, and the self-tapping screws are screwed into the mounting holes on the mounting rail 3. When it is necessary to disconnect the power during operation, the pull rod 404 is pulled, which drives the insulating block 403 and the insulating sleeve 402 to move, changing the opening and closing of the anti-islanding switch 401. The opening and closing of the warning light 405 is observed. When the warning light 405 is turned on, the display circuit is still powered. When the warning light 405 is turned off, it is confirmed that the islanding circuit is de-energized. Specific Implementation Example 2

[0032] Please see Figure 1 , 2 3, 6. Based on the specific embodiment one, the top of the exhaust fan 5 is fixed with fixed rods 501 in a ring array. The top of all the fixed rods 501 are fixed with a protective cover 502. The exhaust fan 5 draws the air in the protective cover 502 above it and delivers it to the outer fixed box 1 to cool the anti-islanding switch 401 and prevent the anti-islanding switch 401 from overheating. The fixed rods 501 connect the exhaust fan 5 and the protective cover 502. The protective cover 502 protects the exhaust fan 5 and prevents impurities from falling directly onto the exhaust fan 5.

[0033] The operation process of this embodiment is as follows: During operation, the exhaust fan 5 is started to draw air into the protective cover 502 and then deliver it to the outer fixed box 1. The air is blown onto the anti-islanding switch 401 inside the outer fixed box 1 to dissipate heat from the anti-islanding switch 401 and prevent it from overheating. After heat dissipation, the air is blown out through the vent 101 on the outer fixed box 1 into the exhaust box 2 and then discharged through the exhaust box 2.

[0034] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0035] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. An anti-islanding protection device for preventing overheating, comprising an external fixed box (1), an exhaust box (2), a mounting rail (3), a fixing plate (4), and an exhaust fan (5), characterized in that: A fan (5) is fixedly connected to the top center of the outer fixed box (1). Several horizontally arranged mounting rails (3) are fixed on the rear side of the inner wall of the outer fixed box (1). Several horizontally arranged ventilation openings (101) are opened on the upper part of both sides of the outer fixed box (1). An exhaust box (2) is fixed on the outside of the ventilation openings (101) on the outside of the outer fixed box (1). A fixing plate (4) is set on the front side of the mounting rail (3) at the top. An anti-islanding switch (401) is fixed in the middle of the top of the fixing plate (4). An insulating sleeve (402) is fixed on the outside of the lever of the anti-islanding switch (401). An insulating block (403) is fixed at the front end of the insulating sleeve (402). Pull rods (404) are fixed on both sides of the insulating block (403).

2. The anti-islanding protection device for preventing overheating according to claim 1, characterized in that: The front door (102) is rotatably connected to the front side of the outer fixed box (1), and the exhaust box (2) is open on both the side and bottom of the outer fixed box (1).

3. The anti-islanding protection device for preventing overheating according to claim 1, characterized in that: Three equally spaced mounting plates (407) are fixed to the rear side of the fixing plate (4). Mounting bolts (408) are inserted through the upper part of each mounting plate (407). The mounting bolts (408) are screwed into the mounting holes on the mounting rail (3) and tightened.

4. The anti-islanding protection device for preventing overheating according to claim 1, characterized in that: A warning light (405) is fixed on the top of the fixing plate (4) on one side of the anti-islanding switch (401), and a protective resistor (406) is fixed on the top of the fixing plate (4) on the side of the anti-islanding switch (401) away from the warning light (405).

5. The anti-islanding protection device for preventing overheating according to claim 4, characterized in that: The protective resistor (406) and the warning light (405) are connected in series, and the protective resistor (406) and the warning light (405) are connected in series with the anti-islanding switch (401).

6. The anti-islanding protection device for preventing overheating according to claim 1, characterized in that: The top of the exhaust fan (5) is fixed with fixed rods (501) in a ring array, and the top of all the fixed rods (501) is fixed with a protective cover (502).

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