Transformer substation capacitor fault open-circuit protection device

Abstract

The utility model discloses a transformer station capacitor fault open-circuit protection device, and belongs to the technical field of capacitor open-circuit protection. The transformer substation capacitor fault open circuit protection device comprises a mounting frame, a capacitor connecting seat is mounted on the mounting frame, a capacitor is inserted into the capacitor connecting seat, a limiting frame is fixedly connected to the mounting frame, vertical sliding grooves are formed in the two sides of the inner wall of the limiting frame, and iron plates are slidably connected into the sliding grooves. The iron plate and the limiting frame are connected through a compression spring, and a connecting assembly capable of fixing the capacitor is installed on the lower surface of the iron plate. When the electromagnetic chuck is powered off, the magnetic force of the electromagnetic chuck disappears, the iron plate is driven to move upwards under the reset action of the compression spring, the capacitor can move upwards, the pins of the capacitor can be moved out of the capacitor connecting base, further damage to the capacitor can be effectively reduced, the capacitor can be separated from a power grid in time, and the probability of safety accidents is reduced.

Description

Technical Field

[0001] This utility model relates to a capacitor fault circuit breaking protection device for substations, belonging to the field of capacitor circuit breaking protection technology. Background Technology

[0002] In substations, capacitors are typically installed in high-voltage distribution areas or low-voltage distribution rooms. A capacitor consists of two conductors (plates) close to each other and an insulating medium in between. When a capacitor is connected to a circuit, under the influence of an electric field, charges accumulate on the plates, forming an electric field and thus storing electrical energy. This process is called charging. When the power supply stops supplying power to the capacitor, the charges on the capacitor plates are released through the circuit, forming a current. This process is called discharging. Through continuous charging and discharging, the capacitor achieves the storage and release of electrical energy.

[0003] Because the inside of the capacitor casing is sealed, a capacitor will generate a lot of heat if it fails. If the capacitor cannot be disconnected from the power grid in time, it may even explode. Therefore, we propose a capacitor fault circuit breaking protection device for substations. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a substation capacitor fault circuit breaking protection device, which solves the problem in the prior art that, because the inside of the capacitor shell is sealed, once the capacitor fails, it will generate a lot of heat. If the capacitor cannot be separated from the power grid in time, it may even lead to the capacitor exploding.

[0005] The technical problem to be solved by this utility model is achieved by the following technical solution:

[0006] A substation capacitor fault circuit interruption protection device includes a mounting frame, a capacitor connector mounted on the mounting frame, a capacitor inserted into the capacitor connector, a limit frame fixedly connected to the mounting frame, vertical sliding grooves on both sides of the inner wall of the limit frame, an iron plate slidably connected inside the sliding groove, the iron plate and the limit frame being connected by a compression spring, a connecting component for fixing the capacitor mounted on the lower surface of the iron plate, and an electromagnetic chuck fixedly mounted on the inner wall of the limit frame.

[0007] By adopting the above technical solution, when the internal components of the capacitor break down and cause a short circuit, the fuse will quickly blow, isolating the faulty capacitor from the power grid. When the fuse is not conducting, the electromagnetic chuck will be de-energized, and the magnetic force of the electromagnetic chuck will disappear. Under the reset action of the compression spring, the iron plate will move upward, which will move the capacitor upward and remove the capacitor leads from the capacitor connector. This can effectively reduce further damage to the capacitor, promptly disconnect it from the power grid, and reduce the probability of safety accidents.

[0008] The present invention is further configured such that: the connecting assembly includes a positioning seat fixedly installed on the lower surface of the iron plate, the positioning seat has a threaded post internally connected to it, and the bottom end of the threaded post is fixedly connected to the capacitor.

[0009] The present invention is further configured such that: the inner wall of the positioning seat is provided with an internal thread, the outer surface of the threaded column is provided with an external thread, and the external thread is adapted to the internal thread.

[0010] By adopting the above technical solution, when replacing or repairing capacitors, workers can unscrew the threaded post on the capacitor from inside the positioning seat, replace it with a new capacitor, and then screw the threaded post on the new capacitor back into the positioning seat to complete the replacement of the new capacitor. This makes disassembly and assembly more convenient and labor-saving, and maintenance faster.

[0011] The present invention is further configured such that: a protective top plate is fixedly connected to the top of the limiting frame, and a fuse is fixedly connected to the lower surface of the protective top plate; the fuse is electrically connected to the electromagnetic chuck via a wire.

[0012] By adopting the above technical solution, the protective top plate can provide an installation position for the fuse and protect the fuse, electromagnetic chuck and capacitor from damage caused by falling debris.

[0013] The present invention is further configured such that: a positioning hole is provided on the electromagnetic chuck, and the inner diameter of the positioning hole is larger than the outer diameter of the positioning seat.

[0014] By adopting the above technical solution, when the electromagnetic chuck is powered on, it can adsorb the iron plate, and the positioning seat on the iron plate can be inserted into the positioning hole on the electromagnetic chuck, which can make the electromagnetic chuck adsorb the iron plate more tightly.

[0015] The present invention is further configured such that: a conductive sheet is fixedly connected to the pin of the capacitor, an insulating frame is fixedly connected to the mounting bracket, a conductive base is fixedly connected to both ends of the insulating frame, and a grounding wire is connected to the conductive base.

[0016] By adopting the above technical solution, when the capacitor is damaged, as the leads on the capacitor move out of the capacitor connector, the conductive plate moves upward and can enter the conductive connector to make contact with it. The conductive connector is then connected to the grounding wire, which discharges the capacitor and reduces the voltage inside the capacitor, thus preventing electric shock accidents when workers perform maintenance.

[0017] The present invention is further configured such that the electromagnetic chuck is electrically connected to the capacitor connector via a wire.

[0018] By adopting the above technical solution, the electromagnetic chuck and the capacitor connector can be connected in series. When the capacitor is damaged, the circuit will be open.

[0019] The beneficial effects of this utility model are as follows: when the internal components of the capacitor break down and cause a short circuit, the fuse will quickly blow, isolating the faulty capacitor from the power grid. When the fuse is not conducting, the electromagnetic chuck will be de-energized, and the magnetic force of the electromagnetic chuck will disappear. Under the reset action of the compression spring, the iron plate will move upward, which will move the capacitor upward and remove the capacitor leads from the capacitor connector. This can effectively reduce further damage to the capacitor, promptly disconnect it from the power grid, and reduce the probability of safety accidents. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the isometric structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the rear-view axonometric structure of this utility model;

[0022] Figure 3 This is a schematic diagram of the axonometric structure of this utility model from a bottom view;

[0023] Figure 4 This utility model Figure 3 Enlarged structural diagram at point A in the middle;

[0024] Figure 5 This utility model Figure 1 Enlarged structural diagram at point B.

[0025] In the diagram: 1. Mounting bracket; 2. Capacitor connector; 3. Capacitor; 4. Limiting bracket; 5. Slide groove; 6. Iron plate; 7. Compression spring; 8. Electromagnetic chuck; 9. Positioning seat; 10. Threaded post; 11. Protective top plate; 12. Fuse; 13. Positioning hole; 14. Conductive sheet; 15. Insulating frame; 16. Conductive seat; 17. Grounding wire. Detailed Implementation

[0026] In order to make the technical means, creative features, objectives and effects of this utility model easier to understand, the following description, in conjunction with specific illustrations, further elaborates on this utility model.

[0027] Example 1

[0028] like Figures 1 to 3As shown, a substation capacitor fault circuit breaking protection device includes a mounting frame 1, a capacitor connection seat 2 mounted on the mounting frame 1, a capacitor 3 inserted into the capacitor connection seat 2, a limit frame 4 fixedly connected to the mounting frame 1, vertical sliding grooves 5 on both sides of the inner wall of the limit frame 4, an iron plate 6 slidably connected inside the sliding groove 5, and the iron plate 6 and the limit frame 4 are connected by a compression spring 7. A connecting component for fixing the capacitor 3 is installed on the lower surface of the iron plate 6. An electromagnetic chuck 8 is fixedly installed on the inner wall of the limit frame 4. The basic structure of the electromagnetic chuck 8 is mainly divided into two parts: a magnetic source and a panel. The panel consists of two main magnetic poles and several transition poles, which are separated by a magnetically shielding copper plate. The magnetic source consists of a coil, an iron core, a base, and a junction box. When the circuit is open, the electromagnetic chuck 8 has magnetic force and can attract the iron plate 6. When the circuit is open, the electromagnetic chuck 8 loses its magnetic force and is electrically connected to the capacitor connection seat 2 through a wire.

[0029] When the internal components of capacitor 3 break down, causing a short circuit, fuse 12 will quickly blow, isolating the faulty capacitor from the power grid. When fuse 12 is not conducting, the electromagnetic chuck 8 will be de-energized, and its magnetic force will disappear. Under the reset action of compression spring 7, iron plate 6 will move upward, causing capacitor 3 to move upward and its leads to be removed from inside capacitor connector 2. This effectively reduces further damage to capacitor 3, promptly disconnects it from the power grid, and lowers the probability of safety accidents.

[0030] like Figure 4 As shown, the connecting assembly includes a positioning seat 9 fixedly installed on the lower surface of the iron plate 6. The internal thread of the positioning seat 9 is connected to a threaded post 10. The bottom end of the threaded post 10 is fixedly connected to the capacitor 3. The inner wall of the positioning seat 9 is provided with an internal thread, and the outer surface of the threaded post 10 is provided with an external thread, and the external thread is compatible with the internal thread. The electromagnetic chuck 8 is provided with a positioning hole 13, and the inner diameter of the positioning hole 13 is larger than the outer diameter of the positioning seat 9.

[0031] When replacing or repairing capacitor 3, the operator can unscrew the threaded post 10 on capacitor 3 from inside the positioning seat 9, replace it with a new capacitor 3, and screw the threaded post 10 on the new capacitor 3 back into the positioning seat 9 to complete the replacement of the new capacitor 3. Disassembly and assembly are more convenient and labor-saving, and maintenance is faster. When the electromagnetic chuck 8 is powered on, it can attract the iron plate 6, and the positioning seat 9 on the iron plate 6 can be inserted into the positioning hole 13 on the electromagnetic chuck 8, which can make the electromagnetic chuck 8 attract the iron plate 6 more tightly.

[0032] like Figure 3As shown, a protective top plate 11 is fixedly connected to the top of the limiting frame 4, and a fuse 12 is fixedly connected to the lower surface of the protective top plate 11. The rated current of the fuse 12 is generally 1.5 to 2.0 times the rated current of the capacitor, ensuring that it will not melt during normal operation but will melt in case of a fault. The fuse 12 is electrically connected to the electromagnetic chuck 8 via a wire. The protective top plate 11 provides an installation position for the fuse 12 and protects the fuse 12, electromagnetic chuck 8, and capacitor 3 from damage caused by falling debris.

[0033] like Figure 5 As shown, conductive plates 14 are fixedly connected to the leads of capacitor 3, and an insulating frame 15 is fixedly connected to the mounting bracket 1. Conductive seats 16 are fixedly connected to both ends of the insulating frame 15, and a grounding wire 17 is connected to the conductive seats 16. When capacitor 3 is damaged, as the leads of capacitor 3 move out of the capacitor connector 2, the conductive plates 14 move upwards and can enter the conductive seat 16, making contact with it. The conductive seat 16 then connects to the grounding wire 17, discharging capacitor 3 and reducing the internal voltage. This prevents electric shock accidents during maintenance.

[0034] When the internal components of capacitor 3 break down, causing a short circuit, fuse 12 will quickly blow, isolating the faulty capacitor 3 from the power grid. When fuse 12 is not conducting, the electromagnetic chuck 8 will be de-energized, and its magnetic force will disappear. Under the reset action of compression spring 7, iron plate 6 will move upward, causing capacitor 3 to move upward. The leads of capacitor 3 will move out of capacitor connector 2, and conductive plate 14 will move upward and enter conductive base 16 to make contact with it. Conductive base 16 will then connect to ground wire 17, discharging capacitor 3 and reducing the voltage inside capacitor 3.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments, and various changes and modifications can be made without departing from the spirit and scope of this utility model. All such changes and modifications fall within the scope of protection claimed by this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A capacitor fault circuit breaking protection device for a substation, comprising a mounting frame (1), a capacitor connector (2) mounted on the mounting frame (1), and a capacitor (3) inserted into the capacitor connector (2), characterized in that: A limiting frame (4) is fixedly connected to the mounting bracket (1). Vertical sliding grooves (5) are provided on both sides of the inner wall of the limiting frame (4). An iron plate (6) is slidably connected inside the sliding groove (5). The iron plate (6) is connected to the limiting frame (4) by a compression spring (7). A connecting component for fixing the capacitor (3) is installed on the lower surface of the iron plate (6). An electromagnetic chuck (8) is fixedly installed on the inner wall of the limiting frame (4).

2. The substation capacitor fault circuit breaking protection device according to claim 1, characterized in that: The connecting assembly includes a positioning seat (9) fixedly installed on the lower surface of the iron plate (6), and the positioning seat (9) is internally threaded with a threaded post (10), the bottom end of which is fixedly connected to the capacitor (3).

3. The substation capacitor fault circuit breaking protection device according to claim 2, characterized in that: The inner wall of the positioning seat (9) is provided with an internal thread, and the outer surface of the threaded column (10) is provided with an external thread, and the external thread is compatible with the internal thread.

4. The substation capacitor fault circuit breaking protection device according to claim 1, characterized in that: The top of the limiting frame (4) is fixedly connected to a protective top plate (11), and a fuse (12) is fixedly connected to the lower surface of the protective top plate (11). The fuse (12) and the electromagnetic chuck (8) are electrically connected through a wire.

5. A substation capacitor fault circuit breaking protection device according to claim 2, characterized in that: The electromagnetic chuck (8) has a positioning hole (13) with an inner diameter larger than the outer diameter of the positioning seat (9). The positioning seat (9) passes through the positioning hole (13).

6. A substation capacitor fault circuit breaking protection device according to claim 1, characterized in that: The capacitor (3) has a conductive sheet (14) fixedly connected to its pins. The mounting bracket (1) has an insulating frame (15) fixedly connected to its pins. Both ends of the insulating frame (15) are fixedly connected to conductive seats (16). A grounding wire (17) is connected to the conductive seats (16).

7. A substation capacitor fault circuit breaking protection device according to claim 1, characterized in that: The electromagnetic chuck (8) is electrically connected to the capacitor connector (2) via a wire.

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