Circuit breaker system and switchgear with the circuit breaker system

Abstract

Embodiments of the present invention relate to a circuit breaker system and a switchgear having the circuit breaker system. The circuit breaker system includes: a circuit breaker having a moving contact adapted to contact a stationary contact above the circuit breaker; a lifting device carrying the circuit breaker and adapted to raise and lower the circuit breaker; a locking device mounted on the lifting device and adapted to lock the lifting device in a locked state where it cannot be raised or lowered; and a balancing device mounted on the side wall of the circuit breaker and adapted to maintain the circuit breaker's horizontal balance during raising and lowering. By using the circuit breaker system according to embodiments of the present invention, it is possible to ensure that the circuit breaker remains balanced during raising, ensure that the valve above the circuit breaker opens correctly, avoid collision with the moving contact, and prevent damage to the valve and moving contact. This achieves normal contact between the moving and stationary contacts, and the lower part of the moving contact is less prone to damage, is tightly sealed, ensures dryness, and is free from dielectric problems, short-circuit faults, etc. At the same time, it improves the locking reliability of the lifting device, preventing accidental operation of the lifting device.

Description

Technical Field

[0001] Embodiments of the present invention relate to the field of circuit breakers, particularly high voltage circuit breakers, and more specifically, to a circuit breaker system and a switchgear having the circuit breaker system. Background Technology

[0002] As is well known, circuit breakers have moving contacts. To ensure contact between the moving contact and the stationary contact of the switchgear, especially for heavy high-voltage circuit breakers, a lifting device design has emerged in recent years. In this design, the moving contact gradually rises with the circuit breaker body, approaching and ultimately contacting the pre-fixed stationary contact located above. The process is reversed when the moving contact separates from the stationary contact.

[0003] However, the current circuit breaker has many drawbacks. During the rising process, the circuit breaker sometimes fails to maintain balance, becoming tilted. This prevents the upper valve from opening properly, causing it to block and collide with the moving contact, damaging both the valve and the moving contact, and preventing normal contact with the stationary contact. The lower part of the moving contact is made of foam plastic, which is easily damaged, has poor sealing, and allows small insects to enter, causing short circuits and other faults. It also easily absorbs moisture, making it difficult to keep dry and causing dielectric problems. The locking reliability of the lifting device is low, and the lifting device is prone to accidental operation. The plugs and sockets of the circuit breaker control circuit need to be manually aligned, which is time-consuming and labor-intensive. Summary of the Invention

[0004] In view of this, embodiments of the present invention propose a novel circuit breaker system and a switch cabinet having the circuit breaker system, thereby eliminating or mitigating various defects present in conventional circuit breakers.

[0005] To achieve the above objectives, a circuit breaker system according to an embodiment of the present invention includes: a circuit breaker having a moving contact adapted to contact a stationary contact above the circuit breaker; a lifting device carrying the circuit breaker and adapted to lift the circuit breaker; a locking device mounted on the lifting device and adapted to lock the lifting device in a locked state where it cannot be lifted; and a balancing device mounted on the side wall of the circuit breaker and adapted to keep the circuit breaker balanced in the horizontal direction during the lifting of the circuit breaker.

[0006] By employing the circuit breaker system according to embodiments of the present invention, it is possible to ensure that the circuit breaker remains balanced during the rising process, ensure that the valve above the circuit breaker opens correctly, avoid collision with the moving contact, and prevent damage to the valve and the moving contact. This ensures normal contact between the moving and stationary contacts, and the lower part of the moving contact is not easily damaged. It is tightly sealed, keeps dry, and is free from dielectric problems, short circuit faults, etc. At the same time, it improves the locking reliability of the lifting device, and the lifting device will not operate unexpectedly.

[0007] In one embodiment of the invention, the locking device includes a rotating shaft and a locking pin perpendicular to and connected to the rotating shaft. The rotating shaft has a lever at one end and a cam at the other end. Here, rotating the lever causes the rotating shaft to rotate, thereby causing the locking pin to extend or retract, thus locking and unlocking the lifting device.

[0008] In one embodiment of the present invention, the locking device further includes a linkage shaft parallel to the rotating shaft, on which a flip plate and a locking trigger are fixedly mounted. The flip plate rests on a cam. The locking trigger can activate the corresponding operating mechanism in the circuit breaker, preventing the circuit breaker from performing a closing operation, thereby ensuring that closing operations are prohibited during the lifting and lowering process and improving the operational safety of the circuit breaker.

[0009] In one embodiment of the invention, the locking device further includes a cover plate movable on the rotating shaft. The cover plate has a locking groove and a traction spring. The rotating shaft has a locking protrusion adapted to extend from the locking groove as the rotating shaft rotates. When the cover plate blocks the locking groove, the locking protrusion cannot extend from the locking groove, preventing the rotating shaft from rotating, thus disabling the locking device. This ensures that the locking device is only allowed to unlock when the circuit breaker is open, thereby allowing the lifting device to move up and down. Otherwise, when the circuit breaker is closed, the locking device is prohibited from unlocking and remains locked, thus preventing the lifting device from moving up and down.

[0010] In one embodiment of the invention, a valve actuating component is provided on the side wall of the circuit breaker opposite to the balancing device. In other words, the balancing device is located on the side opposite to the valve actuating component. Thus, when the valve actuating component applies a tactile force to the valve drive assembly of the switchgear located on the circuit breaker side, the balancing device generates a corresponding balancing force on the opposite side, thereby keeping the circuit breaker balanced without tilting and ensuring that the valve opens correctly.

[0011] In one embodiment of the invention, the balancing device includes a first roller and a balancing spring. The first roller allows the balancing device to roll along the ribs on the wall panel of the compartment where the circuit breaker is located, reducing the frictional force experienced by the circuit breaker during lifting and lowering, thus protecting the circuit breaker from damage. The balancing spring establishes a flexible connection between the circuit breaker and the wall panel, buffering the force experienced by the circuit breaker during lifting and lowering, further contributing to maintaining the balance of the circuit breaker.

[0012] In one embodiment of the present invention, the valve actuating component includes a second roller. During the rising process of the circuit breaker, when the valve actuating component touches and drives the valve drive assembly, the valve actuating component uses the second roller to contact the valve drive assembly of the switchgear, thereby generating rolling friction between the second roller and the valve drive assembly. This makes the opening of the valve smoother and more stable, reduces the wear of the valve actuating component, and lowers the failure rate of the valve actuating component.

[0013] In one embodiment of the present invention, the moving contact includes a bushing and a silicone protective sleeve. The bushing has a surrounding step, and the silicone protective sleeve is fitted onto the bushing and secured by the step. The silicone protective sleeve effectively protects the lower part of the moving contact from debris, small insects, etc., preventing short-circuit faults caused by them. Furthermore, the silicone protective sleeve is not easily damaged, does not absorb moisture, remains dry, and has no potential dielectric problems. In addition, the silicone protective sleeve is secured by the step, making it difficult to detach.

[0014] In one embodiment of the invention, the circuit breaker system further includes an automatic alignment device adapted to automatically align the plug and socket of the circuit breaker's control circuit. This allows the plug and socket to be automatically, easily, and quickly aligned during the circuit breaker's ascent, saving time and effort.

[0015] In one embodiment of the invention, the automatic alignment device includes a pre-guide pin and a final guide pin mounted on a horizontally moving plate, which is movably mounted on a fixed structure of the circuit breaker. The pre-guide pin and the final guide pin are adapted to be inserted into pre-guide holes and final guide holes respectively provided on a vertically moving plate, which is connected to a fixed plate in the circuit breaker system via an adjusting spring. Through the automatic horizontal and vertical adjustment of the horizontal and vertical moving plates, the pre-guide pin enables rapid approximate alignment of the plug and socket, while the final guide pin ensures precise alignment of the plug and socket.

[0016] In one embodiment of the invention, the circuit breaker system further includes a busbar selection device adapted to select different busbars for the circuit breaker, and includes a knob and a latch for interlocking with the circuit breaker. This allows the busbar to be selected in advance, enabling the circuit breaker system to operate for the selected busbar.

[0017] According to another aspect, the present invention also relates to a switchgear having a circuit breaker system according to the foregoing aspects. The aspects and advantages described above with respect to the circuit breaker system also apply accordingly to the switchgear according to embodiments of the present invention, and will not be repeated here. Attached Figure Description

[0018] Other advantages and designs of embodiments of the present invention will now be described in detail with reference to the accompanying drawings, wherein:

[0019] Figure 1 This is a perspective view of a circuit breaker system according to an embodiment of the present invention;

[0020] Figure 2 This is a perspective view of a circuit breaker system according to an embodiment of the present invention.

[0021] Figure 3 This is a perspective view of the locking device of a circuit breaker system according to an embodiment of the present invention during unlocking;

[0022] Figure 4 It is based on Figure 3 A three-dimensional view of the locking device when locked;

[0023] Figure 5 It is based on Figure 3 A partial perspective view of the locking device, showing a movable cover plate when the locking groove is blocked;

[0024] Figure 6 It is based on Figure 3 Another partial perspective view of the locking device, showing a movable cover plate when the locking groove is exposed;

[0025] Figure 7 This is a perspective view of the balancing device of a circuit breaker system according to an embodiment of the present invention;

[0026] Figure 8 This is a perspective view of the valve actuating component of a circuit breaker system according to an embodiment of the present invention;

[0027] Figure 9 This is a perspective view of the bushing in the moving contact of a circuit breaker in a circuit breaker system according to an embodiment of the present invention;

[0028] Figure 10 This is a perspective view of an automatic alignment device for a circuit breaker system according to an embodiment of the present invention;

[0029] Figure 11 It is based on Figure 10 A three-dimensional image of the automatic alignment device viewed from an angle upwards;

[0030] Figure 12 The knob and latch of the bus selection device of the circuit breaker system according to an embodiment of the present invention are shown. Detailed Implementation

[0031] Unless otherwise specified, corresponding numbers and symbols in the different figures generally refer to corresponding areas. The figures are drawn to clearly illustrate relevant aspects of the embodiments and are not necessarily drawn to scale. The edges of features drawn in the figures do not necessarily indicate the termination of the feature range.

[0032] In the following description, various specific details are shown to provide a thorough understanding of various examples of embodiments according to the description. Embodiments may be obtained without one or more specific details, or by utilizing other methods, components, materials, etc. In other instances, known structures, materials, or operations are not shown or described in detail so as not to obscure the various aspects of the embodiments.

[0033] References to "an embodiment" or "an implementation" within the framework of this specification are intended to indicate that a particular configuration, structure, or feature described with respect to that embodiment is included in at least one embodiment. Therefore, phrases such as "in an embodiment," "in one embodiment," etc., that may appear in various aspects of this specification do not necessarily refer precisely to the same embodiment. Furthermore, specific configurations, structures, or features may be combined in any suitable manner in one or more embodiments.

[0034] The title / reference numerals used herein are for readability purposes only and do not limit the scope of protection or the scope of the embodiments. Identical or similar elements are identified using the same reference numerals.

[0035] First refer to Figure 1 and Figure 2 The diagram shows a perspective view of a circuit breaker system 1000 according to an embodiment of the present invention. The circuit breaker system 1000 includes a circuit breaker 100 and a lifting device 200, which carries the circuit breaker 100 and allows it to be raised and lowered. The circuit breaker 100 here is, for example, a high-voltage circuit breaker, which is typically quite heavy. It can be seen that the circuit breaker 100 has protruding moving contacts 101 at its upper part. To bring these moving contacts into contact with fixed stationary contacts (not shown) disposed above them, the lifting device 200 is used to gradually raise the circuit breaker 100, thereby bringing the moving contacts 101 closer to and eventually into contact with the stationary contacts. When the moving contacts 101 separate from the stationary contacts, the lifting device 200 is used in the reverse operation to gradually lower the circuit breaker 100.

[0036] When the lifting device 200 rises or falls to a certain height, such as at the maximum lifting height or minimum lowering height of the lifting device 200, it is necessary to lock the lifting device 200. Therefore, the circuit breaker 100 is only allowed to electrically close or open when it is no longer mechanically moving up or down. For this purpose, the circuit breaker system 1000 according to an embodiment of the present invention further includes a locking device 300, which is installed on the lifting device 200 to lock the lifting device 200 in a locked state where it cannot be raised or lowered.

[0037] See Figure 3 and Figure 4The locking device 300 includes a rotating shaft 301 and a locking pin 302 perpendicular to and connected to the rotating shaft 301. The rotating shaft 301 has a lever 303 at one end and a cam 304 at the other end. Figure 4 The image shows the extended state of the locking pin 302. A corresponding indicator will appear at the locking state eyelet 314, indicating that the locking pin 302 is extended and locked. At this time, the locking pin 302 is inserted into the corresponding hole in the housing wall of the circuit breaker system 1000, thus preventing the lifting device 200 from moving up or down, i.e., locking it, and the circuit breaker 100 cannot move up or down. Rotating the operating lever 303 will cause the rotating shaft 301, which is fixedly connected to it, to rotate, causing the locking pin 302 connected to the rotating shaft 301 to retract. A corresponding indicator will appear at the unlocking state eyelet 315, indicating that the locking pin 302 is retracted and unlocked. Figure 3 As shown. Thus, the locking device 300 unlocks the lifting device 200, allowing the lifting device 200 to move freely up and down, and the circuit breaker can thus move up and down.

[0038] The locking device 300 also includes a linkage shaft 305 parallel to the rotating shaft 301. A flip plate 306 and a locking actuator 307 are fixedly mounted on the linkage shaft 305. The flip plate 306 rests on the cam 304. When the operating lever 303 moves from... Figure 4 The vertical position was rotated clockwise to Figure 3 When the shaft is in the horizontal position, as the rotating shaft 301 rotates, the cam 304 connected to the rotating shaft 301 is lifted clockwise, thus rotating the flip plate 306 attached to the cam 304 counterclockwise. This, in turn, drives the linkage shaft 305 connected to the flip plate 306 to rotate counterclockwise. The rotation of the linkage shaft 305 causes the locking trigger 307 connected to it to lift upwards. Figure 3 As shown, the upward-lifting locking actuator 307 will contact the corresponding operating mechanism located above it in the circuit breaker 100, preventing the circuit breaker 100 from performing a closing operation. This ensures that closing operations are prohibited during the lifting and lowering process, thereby improving the operational safety of the circuit breaker 100. Figure 3 and Figure 4 It is also shown that a return spring 312 is connected to one end of the flip plate 306, and the other end of the return spring 312 is fixedly connected to the fixing part 313. Normally, the locking device 300 is in the locked state. In the locked state, the return spring 312 pulls the flip plate 306 back, keeping it pressed against and engaged with the cam 304.

[0039] See Figure 5 and Figure 6The locking device 300 also includes a cover plate 308 movable on the rotating shaft 301. The cover plate 308 has a locking groove 309 and a traction spring 310. The rotating shaft 301 has a locking protrusion 311, which is adapted to extend from the locking groove 309 as the rotating shaft 301 rotates. The cover plate 308 is mounted on a U-shaped bracket 316, with through holes on its two side walls through which the rotating shaft 301 passes. Normally, the traction spring 310 pulls the cover plate 308 to remain in the open position. If the circuit breaker is closed, i.e., the cover plate 308 blocks the locking groove 309, the locking protrusion 311 cannot extend from the locking groove 309 due to the obstruction of the cover plate 308. Therefore, the rotating shaft 301 cannot rotate, and the locking device 300 is disabled, remaining in the locked state and unable to be unlocked. This ensures that the locking device 300 is only allowed to unlock when the circuit breaker 100 is open, thus allowing the lifting device 200 to move up and down. Otherwise, when the circuit breaker 100 is closed, the locking device 300 is prohibited from unlocking and remains locked, thus preventing the lifting device 200 from moving up and down. Only when conditions permit, a lever (not shown) in the circuit breaker 100 is used to apply force to the touch unit 317, opening the cover plate 308 and exposing the locking groove 309, thereby allowing the rotating shaft 301 to rotate and thus allowing the locking device 300 to unlock.

[0040] like Figure 2 As shown, the circuit breaker system 1000 also includes a balancing device 400, which is mounted on one side wall of the circuit breaker 100 to keep the circuit breaker 100 balanced in the horizontal direction during raising and lowering. Additionally, a valve actuating component 401 is provided on the other side wall of the circuit breaker 100 opposite to the balancing device 400, see [reference]. Figure 1The stationary contacts in switchgear typically carry very high voltages, such as thousands or even tens of thousands of volts. Such high voltages can cause fatal injuries. Therefore, when maintenance personnel repair the switchgear, they need to close the multiple interconnected metal valves (not shown here) located above the circuit breaker 100 to isolate the stationary contacts from personnel, preventing accidental contact and electric shock. During normal service, when the circuit breaker 100 rises close to the valves, the multiple valves need to be opened appropriately and effectively to allow the moving contact 101 of the circuit breaker 100 to extend into the switchgear and contact the stationary contacts. For this purpose, a valve drive assembly is installed on one side wall panel of the compartment containing the circuit breaker 100 to separate the valves. The valve actuation component 401 is used to trigger the operation of the valve drive assembly. However, since the actuation is performed on the same side as the valve drive assembly, i.e., the actuation force is generated only on one side of the circuit breaker 100, the circuit breaker 100 is prone to loss of balance during the actuation of the valve drive assembly by the valve actuation component 401, as there is no supporting force on the other side of the circuit breaker 100. As a result, the valve may not open correctly, causing the moving contact 101 to strike the valve and become damaged, preventing it from making normal contact with the stationary contact. According to an embodiment of the present invention, by providing a balancing device on the side opposite to the valve actuation component 401, this balancing device acts on the wall panel of the compartment where the circuit breaker 100 is located, providing a fulcrum for the circuit breaker 100, preventing the circuit breaker 100 from tilting during its ascent, maintaining balance, and ensuring that the moving contact 101 of the circuit breaker 100 extends smoothly and undamaged from the valve and makes correct contact with the stationary contact.

[0041] Specifically, see Figure 7 The balancing device 400 includes a first roller 402 and a balancing spring 403. Vertically extending ribs are provided on the compartment wall panel on the side where the balancing device 400 is located. The balancing device 400 utilizes these existing ribs to guide the circuit breaker 100, causing the first roller 402 to roll along the ribs, thereby reducing the frictional force experienced by the circuit breaker during lifting and lowering, protecting the circuit breaker 100 from damage. Furthermore, the balancing spring 403 of the balancing spring 400 establishes a flexible connection between the circuit breaker 100 and the wall panel, thus buffering the force experienced by the circuit breaker 100 during lifting and lowering, further contributing to maintaining the balance of the circuit breaker 100.

[0042] In one embodiment of the present invention, see Figure 8The valve actuating component 401 includes a second roller 404. In the prior art, as the circuit breaker 100 rises, a bent and welded sheet metal part touches and drives the valve drive assembly of the switchgear, thereby opening the valve so that the moving contact 101 of the circuit breaker 100 extends upward from the valve. In this case, sliding friction is generated between the bent portion of the sheet metal and the valve drive assembly in the switchgear, and the valve drive assembly of the switchgear is driven by sliding friction, which results in relatively high friction. If the sheet metal part used as the drive component is not strong enough, the sheet metal part is prone to deformation and damage under static friction, and it can also lead to problems such as insufficient valve opening. In contrast, in this application, a second roller 404 is used instead of the sheet metal part in the prior art. Specifically, when the valve actuating component 401 touches and drives the valve drive assembly as the circuit breaker 100 rises, the second roller 404 of the valve actuating component 401 contacts the valve drive assembly of the switchgear, thereby generating rolling friction between the second roller 404 and the valve drive assembly. Since the frictional force of rolling friction is much smaller than that of sliding friction, the wear and tear on the valve actuating component 401 due to friction is reduced, lowering the damage rate of the valve actuating component 401, and making the opening of the valve smoother and more stable. Of course, this invention is not limited to rollers; any other method can be used to achieve rolling friction, such as rollers. This invention does not limit this.

[0043] like Figure 9 As shown, the moving contact 101 includes a bushing 102 and a silicone protective sleeve 103. A surrounding step 104 is provided on the bushing 102. The silicone protective sleeve 103 is fitted onto the bushing 102 and is held in place by the step 104. Figure 9 As can be seen, the silicone protective sleeve 103 is quite large, covering the lower part of the moving contact 101. This effectively prevents debris, small crawling insects, and small flying insects from entering, avoiding potential short circuits. Furthermore, the silicone protective sleeve 103 is durable, not easily damaged, does not absorb moisture, and remains dry for a long time, with no potential dielectric issues. Additionally, the silicone protective sleeve 103 is secured by the step 104, preventing it from easily falling off.

[0044] See now Figure 10 and 11The circuit breaker system 1000 also includes an automatic alignment device 500, which automatically aligns the plug 501 and socket 502 of the control circuit of the circuit breaker 100. The circuit breaker 100 includes a main circuit and a control circuit. The moving contact 101 and stationary contact are located on the main circuit, and they carry high voltage. The control circuit controls the main circuit, and its voltage is relatively low. When the circuit breaker 100 is operating, it is necessary to ensure that the moving contact 101 and stationary contact are in correct contact, and that the plug 501 and socket 502 of the control circuit are correctly connected to achieve proper control of the main circuit. Therefore, it is essential to ensure that the plug 501 and socket 502 are aligned.

[0045] Specifically, the automatic alignment device 500 includes a pre-guide pin 503 and a final guide pin 504 mounted on a horizontal moving plate 505, which is movably mounted on a fixing structure 506 of the circuit breaker 100. The pre-guide pin 503 and the final guide pin 504 can be inserted into pre-guide holes 507 and final guide holes 508 respectively provided on a vertical moving plate 509, which is connected to a fixing plate 511 in the circuit breaker system 1000 via an adjusting spring 510. Here, the vertical moving plate 509 and the fixing plate 511 are pre-installed in appropriate positions within the switchgear, so that... Figure 1 and 2 (Not shown). In this way, as the circuit breaker 100 rises to the point where the plug 501 and socket 502 are close to each other, the pre-guide pin 503 is first inserted into the pre-guide hole 507. If the pre-guide pin 503 is not precisely inserted into the pre-guide hole 507, the height of the vertical moving plate 509 can be slightly adjusted vertically based on the elasticity of the adjusting spring 510, and the adjusting horizontal moving plate 505 can be moved appropriately to ensure that the pre-guide pin 503 is accurately inserted into the pre-guide hole 507. Then, as the circuit breaker 100 rises further, the final guide pin 504 is inserted into the final guide hole 508, achieving precise alignment, thereby ensuring precise alignment of the plug 501 and socket 502. This allows the plug 501 and socket 502 to automatically, easily, and quickly align during the rising of the circuit breaker 100, without manual operation, saving time and effort, and improving accuracy and efficiency.

[0046] The circuit breaker system 1000 also includes a busbar selection device for selecting different busbars for the circuit breaker 100, and includes a knob 601 and a latch 602 for interlocking with the circuit breaker 100. See [link to relevant documentation] Figure 12Here, before the circuit breaker 100 operates, it is necessary to first set which busbar the circuit breaker 100 is intended to operate on, i.e., the busbar needs to be selected in advance. Then, before installing the circuit breaker 100, the locking pin 602 must be in the retracted state (not shown). After the circuit breaker 100 has been installed and is precisely in the operating position corresponding to the busbar, the knob 601 shown must be turned to extend the locking pin 602 and insert it into the hole on the switchgear, such as... Figure 12 As shown, otherwise the circuit breaker 100 is prohibited from rising or falling. In other words, the locking pin 602 cannot retract during the rising or falling of the circuit breaker 100. This achieves interlocking with the circuit breaker 100.

[0047] According to another aspect, embodiments of the present invention also relate to a switchgear having a circuit breaker system 1000 according to the foregoing aspects. The aspects and advantages described above with respect to the circuit breaker system 1000 are also applicable to the switchgear according to embodiments of the present invention, and will not be repeated here.

[0048] From the teachings given in the foregoing description and related drawings, many modifications and other embodiments of the present disclosure will become apparent to those skilled in the art. Therefore, it is to be understood that embodiments of the present disclosure are not limited to the specific embodiments disclosed, and modifications and other embodiments are intended to be included within the scope of this disclosure. Furthermore, although the foregoing description and related drawings have described exemplary embodiments in the context of certain example combinations of components and / or functions, it should be appreciated that different combinations of components and / or functions may be provided by alternative embodiments without departing from the scope of this disclosure. In this regard, for example, other combinations of components and / or functions that differ from those explicitly described above are also contemplated within the scope of this disclosure. Although specific terms are used herein, they are used in a general and descriptive sense only and are not intended to be limiting.

Claims

1. A circuit breaker system (1000), comprising: Circuit breaker (100) having a moving contact (101) adapted to contact a stationary contact above the circuit breaker (100). A lifting device (200) that carries the circuit breaker (100) is adapted to lift the circuit breaker (100); A locking device (300) is installed on the lifting device (200) and is adapted to lock the lifting device (200) in a locked state where it cannot be lifted or lowered. A balancing device (400), which is installed on the side wall of the circuit breaker (100), is adapted to keep the circuit breaker (100) balanced in the horizontal direction during the raising and lowering of the circuit breaker (100); The locking device (300) includes a rotating shaft (301), a locking pin (302) perpendicular to and connected to the rotating shaft (301), the rotating shaft (301) having a lever (303) at one end and a cam (304) at the other end.

2. The circuit breaker system (1000) of claim 1, wherein, The locking device (300) also includes a linkage shaft (305) parallel to the rotating shaft (301), on which a flip plate (306) and a locking trigger (307) are fixedly mounted, and the flip plate (306) rests on the cam (304).

3. The circuit breaker system (1000) of claim 2, wherein, The locking device (300) further includes a cover plate (308) movable on the shaft (301), the cover plate (308) having a locking groove (309) and a traction spring (310), the shaft (301) having a locking protrusion (311) adapted to extend from the locking groove (309) as the shaft (301) rotates.

4. The circuit breaker system (1000) according to any one of claims 1 to 3, wherein, A valve actuation component (401) is provided on the side wall of the circuit breaker (100) opposite to the balancing device (400).

5. The circuit breaker system (1000) of claim 4, wherein, The balancing device (400) includes a first roller (402) and a balancing spring (403).

6. The circuit breaker system (1000) of claim 4, wherein, The valve actuation component (401) includes a second roller (404).

7. The circuit breaker system (1000) according to any one of claims 1 to 3, wherein, The moving contact (101) includes a bushing (102) and a silicone protective sleeve (103). The bushing (102) is provided with a surrounding step (104). The silicone protective sleeve (103) is fitted onto the bushing (102) and is held in place by the step (104).

8. The circuit breaker system (1000) according to any one of claims 1 to 3, wherein, The circuit breaker system (1000) also includes an automatic alignment device (500) adapted to automatically align the plug (501) and socket (502) of the control circuit of the circuit breaker (100).

9. The circuit breaker system (1000) of claim 8, wherein, The automatic alignment device (500) includes a pre-guide pin (503) and a final guide pin (504) mounted on a horizontal moving plate (505), which is movably mounted on a fixed structure (506) of the circuit breaker (100).

10. The circuit breaker system (1000) of claim 9, wherein, The pre-guide pin (503) and the final guide pin (504) are adapted to be inserted into the pre-guide hole (507) and the final guide hole (508) respectively provided on the vertical moving plate (509), which is connected to the fixed plate (511) in the switch cabinet by means of the adjusting spring (510).

11. The circuit breaker system (1000) according to any one of claims 1 to 3, wherein, The circuit breaker system (1000) also includes a bus selection device adapted to select different buses for the circuit breaker (100) and includes a knob (601) and a latch (602) for interlocking with the circuit breaker (100).

12. A switch cabinet having a circuit breaker system (1000) according to any one of claims 1 to 11.

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