Photovoltaic miniature circuit breaker

Abstract

The utility model discloses a photovoltaic miniature circuit breaker which comprises a miniature circuit breaker main body, the front end of the miniature circuit breaker main body is electrically connected with a switch, the side wall of the front end of the miniature circuit breaker main body is provided with a fixing plate, the fixing plate is provided with a limiting assembly through a reset assembly, and the limiting assembly is matched with the switch. The rear end of the miniature circuit breaker body is provided with an installation mechanism. The miniature circuit breaker has the beneficial effects that when the miniature circuit breaker main body cuts off a circuit, namely when the switch trips down, the limiting assembly resets and can limit the switch, so that limiting can be carried out when a worker pulls up and closes the switch, the worker can be reminded again to check lines, equipment and the like, closing operation is carried out after it is determined that errors are correct, and the working efficiency is improved. The operation safety is ensured, and negligence and the like are prevented from carrying out switching-on operation according to a specified program.

Description

Technical Field

[0001] The utility model relates to the field of circuit breakers, and in particular to a photovoltaic miniature circuit breaker. Background Art

[0002] A circuit breaker is a switching device capable of closing, carrying, and interrupting current under normal circuit conditions, and closing, carrying, and interrupting current under abnormal circuit conditions within a specified timeframe. Circuit breakers are categorized as high-voltage and low-voltage based on their scope of use. The distinction between high and low voltage is somewhat ambiguous, with voltages above 3kV generally considered high-voltage. Circuit breakers are also required in the photovoltaic field. Photovoltaic power generation systems, abbreviated as PV, utilize the photovoltaic effect of photovoltaic cells to directly convert solar radiation into electrical energy. Circuit breakers are also required in the photovoltaic power generation process.

[0003] However, photovoltaic miniature circuit breakers have certain defects in actual use. After a fault occurs and the circuit is cut off, staff are required to perform maintenance and then turn on the switch to close the circuit. Most circuit breakers are not equipped with reminder devices, and the circuit can be closed directly by turning on the switch. However, sometimes relevant personnel may try to close the circuit without knowing it, which may cause safety hazards to the photovoltaic system or maintenance personnel. Utility Model Content

[0004] The purpose of the present utility model is to provide a photovoltaic miniature circuit breaker to solve the problems raised in the above background technology.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] A photovoltaic miniature circuit breaker includes a miniature circuit breaker body, a switch electrically connected to the front end of the miniature circuit breaker body, a fixing plate symmetrically provided at the front end of the miniature circuit breaker body, a limit assembly provided on the fixing plate via a reset assembly, the limit assembly matching the switch, and a mounting mechanism provided at the rear end of the miniature circuit breaker body.

[0007] Furthermore, in order to facilitate the reset of the switch after it trips, a limit assembly is used to limit it. The reset assembly includes a sliding column slidably arranged on a fixed plate, and a limit plate is fixedly arranged at the end of the sliding column away from the switch. A spring is provided between the limit plate and the fixed plate, and the spring is sleeved on the outside of the sliding column.

[0008] Furthermore, in order to limit the switch and provide a reminder when the switch is subsequently closed to prevent direct closing and improve safety, the limit assembly includes a limit block fixedly connected to the sliding column near one end of the switch, and an insulating sleeve is provided on the side surface of the limit block.

[0009] Furthermore, in order to facilitate the installation operation of the miniature circuit breaker body and make it simpler and more convenient, the installation mechanism includes a mounting plate fixedly arranged at the rear end of the miniature circuit breaker body, the mounting plate is provided with a mounting slot, a mounting bracket is engaged in the mounting slot, and the mounting plate and the mounting bracket are connected by a fixing component.

[0010] Furthermore, in order to facilitate positioning and fixing after installation and ensure firmness during use, the fixing component includes mounting holes symmetrically opened on the mounting plate and the mounting frame, mounting columns are inserted into the mounting holes, and a pull plate is fixed to one end of the mounting column close to the mounting plate.

[0011] Furthermore, in order to carry out positioning and fixation, ensure firmness, and facilitate subsequent removal operations, a rubber sleeve is provided on one end of the mounting post close to the mounting frame.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] (1) After the miniature circuit breaker body cuts off the circuit, that is, when the switch trips, the reset component and the limit component are reset, and the switch is limited. When the staff turns on and closes the switch, the limit component is set, and the staff is reminded to check the circuit and equipment again. After confirming that everything is correct, the closing operation is carried out, ensuring the safety of the operation and preventing negligence and other failures to perform the closing operation in accordance with the prescribed procedures;

[0014] (2) The miniature circuit breaker body can be easily installed by means of the installation mechanism. The screw-free installation and fixation facilitates the assembly operation. At the same time, it is easy to disassemble and remove when disassembly is required, making the operation more convenient and simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 This is a schematic structural diagram of a photovoltaic miniature circuit breaker according to an embodiment of the present utility model;

[0017] Figure 2 This is a partial structural diagram of a photovoltaic miniature circuit breaker according to an embodiment of the present utility model;

[0018] Figure 3 This is a structural diagram of a reset component and a limit mechanism in a photovoltaic miniature circuit breaker according to an embodiment of the present utility model;

[0019] Figure 4 This is a structural diagram of an installation mechanism in a photovoltaic miniature circuit breaker according to an embodiment of the present utility model;

[0020] Figure 5 It is a partial structural schematic diagram of a photovoltaic miniature circuit breaker according to an embodiment of the utility model.

[0021] Reference numerals:

[0022] 1. Miniature circuit breaker body; 2. Switch; 3. Mounting plate; 4. Mounting bracket; 5. Fixing plate; 6. Limit plate; 7. Spring; 8. Sliding column; 9. Limit block; 10. Insulating sleeve; 11. Mounting hole; 12. Pull plate; 13. Mounting slot; 14. Mounting column; 15. Rubber sleeve; 16. Connecting plate; 17. Positioning column; 18. Positioning hole. DETAILED DESCRIPTION

[0023] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] See also Figure 1-Figure 5 According to an embodiment of the present invention, a photovoltaic miniature circuit breaker includes a miniature circuit breaker body 1, which is used in photovoltaic power generation and distribution systems, junction boxes and other DC electrical equipment. It can quickly disconnect fault currents and provide reverse current protection. It is mainly composed of a trip unit, a trigger device, a contact system, an arc extinguishing device and a switch 2. It can quickly cut off the power supply when a short circuit or overload occurs in the circuit. At the same time, it is also equipped with a toggle mechanism and a controller as well as a separate power supply battery. It can be conveniently remotely controlled to perform opening and closing operations when an overload or short circuit occurs. It can also be switched between automatic and manual modes. Its principle is the same as that of the CBRB7-125GF circuit breaker, which is a relatively mature technology and will not be discussed here. In detail, in order to facilitate the installation of the mounting plate 3 with the mounting mechanism bonded to its rear end, a mounting slot 13 is provided on it, which is convenient for assembly and engagement on the mounting frame 4. The mounting frame 4 (which can assemble multiple miniature circuit breaker bodies 1 or other electrical components) can be installed inside the box of the power distribution system. In order to ensure a firm installation, the mounting plate 3 and the mounting frame 4 are both provided with mounting holes 11 for fixing the components, and mounting columns 14 are inserted into them. In order to facilitate plugging and unplugging operations, a pull plate 12 is welded to one end of the mounting column 14 close to the mounting plate 3. In order to limit the position after plugging and avoid falling off, a rubber sleeve 15 is bonded to one end of the mounting column 14 close to the mounting frame 4.

[0025] See also Figure 1-Figure 5 In order to limit the switch 2 after the power is cut off due to a short circuit or other fault, the safety can be improved and a procedure can be added to prevent the staff from closing the switch without checking or operating according to the prescribed procedures. The staff can be reminded to prevent them from directly turning on the switch 2 to close the switch. A fixed plate 5 is installed on the front side wall of the miniature circuit breaker body 1. A sliding post 8 of a reset component is slidingly provided on the fixed plate 5, and a limiting plate 6 is welded on the end away from the switch 2. The outside of the sliding post 8 is located between the fixed plate 5 and the limiting plate 6 and is provided with a spring 7. The sliding post 8 is close to the switch 2. A limit block 9 is welded at one end, and the side surface of the limit block 9 is wrapped with an insulating sleeve 10. At the same time, in order to adjust the limit assembly according to the needs of use, the positioning column 17 can be removed when needed, which will not affect the use of the limit assembly. The limit can be plugged in during automatic remote opening and closing without affecting the remote control operation. A connecting plate 16 is welded on one side of the top of the fixed plate 5, wherein positioning holes 18 are provided on the connecting plate 16 and the limit block 9, and positioning columns 17 are inserted inside them, which can facilitate the positioning and fixing of the limit block 9 and will not affect its limiting operation when it is taken out.

[0026] During actual use, a warning sign "Do Not Touch" and a reflective sticker can be hung on the positioning column 17 so that relevant personnel can see that the positioning column 17 has been pulled out and know that relevant personnel are performing maintenance.

[0027] In order to facilitate understanding of the above technical solutions of the present invention, the working principle or operation method of the present invention in actual process is described in detail below.

[0028] When assembling the miniature circuit breaker body 1, the mounting plate 3 can be assembled to the mounting frame 4 through the mounting slot 13, and then the mounting column 14 is inserted into the mounting hole 11. During the plugging process, the rubber sleeve 15 is deformed by the force, and after the plugging is completed, the rubber sleeve 15 recovers its deformation and can be engaged with the mounting frame 4 to complete the positioning and fixation. When the protective limit of the limit block 9 is needed, the positioning column 17 can be removed during use, and the positioning and fixation of the limit block 9 is lost. When a short circuit or other fault occurs, the working switch 2 of the miniature circuit breaker body 1 is pulled down to cut off the circuit. At this time, the sliding column 8 is reset under the action of the contraction potential energy of the spring 7 and slides on the fixed plate 5, so that the two limit blocks 9 are close to each other, which can limit the switch 2. After the staff inspects the line, the limit block The presence of 9 can prevent the staff from performing the closing operation. The line and the miniature circuit breaker body 1 can be checked again to confirm that they are correct before the closing operation. When closing, you can first pull the limit plate 6, which will slide with the sliding column 8. The spring 7 is stretched and stores potential energy, and the limit blocks 9 move away from each other, losing the limit on the switch 2. You can pull it upward to close the switch, and the two limit blocks 9 on the plate are in contact with the two side walls of the switch 2 (without affecting the use of jumping down to cut off the circuit in the event of a short circuit or other fault). When using remote control to perform the opening and closing operation, the positioning column 17 can be inserted into the positioning hole 18, and the limit block 9 can be plugged in and limited, thereby losing the limit operation on the switch 2. When the switch 2 is opened and closed, the limit blocks 9 are in a fixed state and do not affect normal use.

[0029] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A photovoltaic miniature circuit breaker, comprising a miniature circuit breaker body (1), characterized in that: The front end of the miniature circuit breaker body (1) is electrically connected to a switch (2); a fixing plate (5) is provided on the front side wall of the miniature circuit breaker body (1); a limit assembly is provided on the fixing plate (5) via a reset assembly; the limit assembly matches the switch (2); and a mounting mechanism is provided at the rear end of the miniature circuit breaker body (1); The reset assembly comprises a sliding column (8) slidably arranged on a fixed plate (5); a limit plate (6) is fixedly arranged at one end of the sliding column (8) away from the switch (2); a spring (7) is arranged between the limit plate (6) and the fixed plate (5), and the spring (7) is sleeved on the outside of the sliding column (8).

2. A photovoltaic miniature circuit breaker according to claim 1, characterized in that: The limit assembly comprises a limit block (9) fixedly connected to a sliding column (8) near one end of the switch (2), and an insulating sleeve (10) is provided on the side surface of the limit block (9).

3. The photovoltaic miniature circuit breaker according to claim 2, characterized in that: A connecting plate (16) is fixedly provided on the top of the fixing plate (5), and positioning holes (18) are provided on the connecting plate (16) and the limiting block (9), and a positioning column (17) is inserted into the positioning hole (18).

4. The photovoltaic miniature circuit breaker according to claim 3, characterized in that: The mounting mechanism comprises a mounting plate (3) fixedly arranged at the rear end of the miniature circuit breaker body (1); a mounting slot (13) is provided on the mounting plate (3); a mounting frame (4) is engaged in the mounting slot (13); and the mounting plate (3) and the mounting frame (4) are connected via a fixing assembly.

5. The photovoltaic miniature circuit breaker according to claim 4, characterized in that: The fixing assembly comprises mounting holes (11) symmetrically arranged on the mounting plate (3) and the mounting frame (4), a mounting post (14) being inserted into the mounting hole (11), and a pull plate (12) being fixedly provided at one end of the mounting post (14) close to the mounting plate (3).

6. The photovoltaic miniature circuit breaker according to claim 5, characterized in that: One end of the mounting post (14) close to the mounting frame (4) is sleeved with a rubber sleeve (15).

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