An automatically switched power-saving type smart grid low-voltage switch cabinet and a switching method thereof

Abstract

This invention relates to the field of low-voltage switchgear technology, specifically an automatic switching, energy-saving smart grid low-voltage switchgear and its switching method. The switchgear includes a cabinet, within which an automatic circuit switching device is installed. This device includes a base frame fixed within the cabinet, a first conductor connected to the main circuit on the base frame, and a second conductor connected in series with the first conductor. A first contact connected to an energy-saving module and a second contact connected to an emergency power supply line without energy-saving function are slidably mounted on the base frame. A rotating shaft is rotatably mounted on the base frame, and a conductor is mounted on the shaft. When the energy-saving module malfunctions or actively exits the energy-saving mode, this invention can automatically disconnect the energy-saving module from the main circuit and automatically divert the current to the emergency power supply line without energy-saving function, allowing the current to continuously supply power through the backup line without energy-saving function. This completely solves the common industry problem of "power system paralysis caused by abnormal energy-saving function."

Description

Technical Field

[0001] This invention relates to the field of low-voltage switchgear technology, specifically to an automatic switching, energy-saving smart grid low-voltage switchgear and its switching method. Background Technology

[0002] In the low-voltage distribution system of smart grids, intelligent switchgear with integrated energy-saving functions achieves energy conservation by dynamically adjusting output voltage and optimizing power factor, and has become a core device in the industrial and commercial sectors. However, existing technologies have a key drawback: when the energy-saving module itself malfunctions or is in a non-energy-saving operating mode such as initialization, debugging, or maintenance, there is a lack of an effective mechanism to ensure the continuity of power supply.

[0003] The existing technology has the following drawbacks:

[0004] (1) The energy-saving module of the traditional energy-saving switch cabinet is usually connected in series in the main power supply circuit. Once the module fails due to overload, component damage or control logic error, it will directly cut off the main circuit power supply path, causing unplanned power outages, seriously affecting the normal operation of the user side load, and even causing production accidents or data loss.

[0005] (2) When existing equipment exits the power saving mode, such as switching to the direct power supply mode, the maintenance personnel need to perform complex mechanical switch operations or software command switching on site. This process takes a long time and cannot respond in time at night or in unattended scenarios, which cannot meet the needs of scenarios with strict requirements for power supply continuity, such as data centers, medical facilities and production lines.

[0006] (3) Although some high-end equipment is equipped with redundant power-saving modules, no dedicated safety bypass channel for power-saving function is designed. When the main power-saving unit fails, the system can only achieve passive protection power-off through fuses or relays, and cannot automatically direct the current to the emergency power supply line without power-saving function, resulting in the chain risk of "power-saving function failure = system power failure".

[0007] To address these issues, we provide an automatic switching, energy-saving smart grid low-voltage switchgear and its switching method. Summary of the Invention

[0008] The purpose of this invention is to provide an automatically switching, energy-saving smart grid low-voltage switchgear and its switching method to solve the problems mentioned in the background art.

[0009] To achieve the above objectives, the present invention provides the following technical solution:

[0010] An automatic switching, energy-saving smart grid low-voltage switchgear includes a cabinet, an automatic circuit switching device is installed inside the cabinet, the automatic circuit switching device includes a base frame fixed inside the cabinet, a first conductor connected to the main circuit is installed on the base frame, a second conductor is connected in series on the first conductor, and a first contact connected to an energy-saving module and a second contact connected to an emergency power supply line without energy-saving function are slidably installed on the base frame respectively.

[0011] A rotating shaft is rotatably mounted on the base frame, and a conductor is mounted on the rotating shaft. A first contact switch and a second contact switch, which are fixed to the base frame, are respectively mounted on both sides of the conductor. An emergency mode indicator light connected to the first contact switch and a power-saving mode indicator light connected to the second contact switch are mounted on the outer wall of the cabinet.

[0012] The first contact, the second contact, and the rotating shaft are connected by a linkage structure. When the first contact slides to make electrical contact with the first conductor, the second contact slides to disengage from the second conductor. The rotating shaft rotates counterclockwise, causing the conductor to disengage from the first contact switch and make electrical contact with the second contact switch. The emergency mode indicator light goes out, the power-saving mode indicator light comes on, and the power-saving mode is switched to. When the first contact slides to disengage from the first conductor, the second contact slides to make electrical contact with the second conductor. The rotating shaft rotates clockwise, causing the conductor to disengage from the second contact switch and make electrical contact with the first contact switch. The emergency mode indicator light comes on, the power-saving mode indicator light goes out, and the emergency mode is switched to.

[0013] As described above, an automatic switching, energy-saving smart grid low-voltage switchgear is provided: the first conductor and the second conductor are connected by a non-insulated metal plate, and the second conductor is fixed on the base frame.

[0014] An automatic switching, energy-saving smart grid low-voltage switchgear as described above: The linkage structure includes a first slide rod slidably mounted on a base frame and fixed to a first contact, and a second slide rod slidably mounted on a base frame and fixed to a second contact. An electromagnetic actuator is provided on the base frame. The electromagnetic actuator includes a push plate fixed to the first slide rod at its output end. The electromagnetic actuator drives the push plate to reciprocate. The push plate and the second contact cooperate through a first linkage mechanism. When the push plate moves towards the side closer to the first conductor, causing the first contact to contact the first conductor, it will cause the second contact to move away from the second conductor, so that the second contact is no longer in contact with the second conductor. When the push plate moves away from the first conductor, causing the first contact to disengage from the first conductor, it will cause the second contact to move towards the side closer to the second conductor, so that the second contact is in contact with the second conductor.

[0015] The push plate and the rotating shaft are connected by a second linkage mechanism. When the push plate moves closer to the first conductor, causing the first contact to contact the first conductor, it will cause the rotating shaft to rotate counterclockwise, causing the conductor to detach from the first contact switch and make electrical contact with the second contact switch. When the push plate moves away from the first conductor, causing the first contact to detach from the first conductor, it will cause the rotating shaft to rotate clockwise, causing the conductor to detach from the second contact switch and make electrical contact with the first contact switch.

[0016] As described above, an automatic switching, energy-saving smart grid low-voltage switchgear is provided with a first guide seat and a second guide seat on the base frame. The first slide rod is movably disposed through the first guide seat, and the second slide rod is movably disposed through the second guide seat.

[0017] As described above, an automatic switching energy-saving smart grid low-voltage switchgear includes: the first linkage mechanism includes an L-shaped connecting plate fixed to the push plate; a rotating arm is rotatably mounted on the base frame; one end of the rotating arm is hinged to the L-shaped connecting plate; and the other end is provided with a linkage slider; one end of the second sliding rod is provided with a rectangular frame; and the linkage slider is movably engaged inside the rectangular frame.

[0018] As described above, an automatic switching energy-saving smart grid low-voltage switchgear includes a second linkage mechanism comprising a rotating rod fixed on a rotating shaft and a connecting rod fixed to a push plate. A hinge rod is provided between the connecting rod and the rotating rod, with one end of the hinge rod fixed to the rotating rod and the other end hinged to the connecting rod.

[0019] An automatic switching, energy-saving smart grid low-voltage switchgear as described above: a support is provided on the base frame, a ball is movably sleeved on the rotating rod, the rotating shaft is rotatably mounted on the support, and the ball rolls on the surface of the support.

[0020] A switching method for an automatically switching, energy-saving smart grid low-voltage switchgear includes the following steps:

[0021] S1, when the power-saving module malfunctions or actively exits the power-saving mode, the electromagnetic driver is activated to drive the push plate to move away from the first conductor, causing the first contact connected to the power-saving module and the first conductor connected to the main circuit to disengage, automatically disconnecting the power-saving module from the main circuit. At the same time, the second contact connected to the emergency power supply line without power-saving function is moved closer to the second conductor so that the second contact makes contact with the second conductor. Since the first conductor and the second conductor are connected in series, the second contact is connected to the first conductor circuit, directing the current to the emergency power supply line without power-saving function, switching to emergency mode. At the same time, the shaft rotates clockwise, causing the conductor to disengage from the second contact switch and make contact with the first contact switch. The power-saving mode indicator light goes out, and the emergency mode indicator light illuminates to indicate the emergency mode status.

[0022] S2, when it is necessary to switch back to the power-saving mode, the electromagnetic driver is activated to drive the push plate to move closer to the first conductor, causing the first contact connected to the power-saving module and the first conductor connected to the main circuit to make contact, automatically connecting the power-saving module to the main circuit. At the same time, the second contact connected to the emergency power supply line without power-saving function is moved away from the second conductor to disengage the second contact from the second conductor. Since the first conductor and the second conductor are connected in series, the circuit between the second contact and the first conductor is disconnected, and the current is directed to the power supply line with the power-saving module to supply power, switching to the power-saving mode. At the same time, the shaft rotates counterclockwise, causing the conductor to disengage from the first contact switch and make contact with the second contact switch. The emergency mode indicator light goes out, and the power-saving mode indicator light illuminates to indicate the power-saving mode status.

[0023] Compared with the prior art, the beneficial effects of the present invention are:

[0024] In use, when the power-saving module malfunctions or actively exits the power-saving mode, the electromagnetic actuator is activated to drive the push plate to move away from the first conductor, causing the first contact connected to the power-saving module and the first conductor connected to the main circuit to disengage, automatically disconnecting the power-saving module from the main circuit. Simultaneously, the second contact connected to the emergency power supply line without power-saving function moves closer to the second conductor, making contact with the second conductor and connecting the second contact to the first conductor circuit, directing current to the emergency power supply line without power-saving function, thus switching to emergency mode. When it is necessary to switch back to power-saving mode, the electromagnetic actuator is activated to drive the push plate to move closer to the first conductor, causing the first contact connected to the power-saving module and the first conductor connected to the main circuit to contact, automatically reconnecting the power-saving module to the main circuit. Simultaneously, the second contact connected to the emergency power supply line without power-saving function moves away from the second conductor, disengaging the second contact from the first conductor circuit, thus disconnecting the second contact from the first conductor circuit, directing current to the power supply line with the power-saving module.

[0025] Therefore, this invention, by setting up an automatic circuit switching device, can automatically disconnect the connection between the power-saving module and the main circuit when the power-saving module fails or actively exits the power-saving mode, and automatically direct the current to the emergency power supply line without power-saving function, so that the current can continue to supply power through the backup line without power-saving function, completely solving the common industry problem that "abnormal power-saving function leads to power supply system paralysis". At the same time, the circuit mode switching does not rely on manual operation and the response is faster. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of an automatic switching, energy-saving smart grid low-voltage switchgear.

[0027] Figure 2This is a schematic diagram of the internal structure of a low-voltage switchgear for an automatic switching, energy-saving smart grid.

[0028] Figure 3 This is a schematic diagram of the automatic circuit switching device for an energy-saving smart grid low-voltage switchgear with automatic switching.

[0029] Figure 4 This is a low-voltage switchgear for an automatic switching, energy-saving smart grid. Figure 3 A structural diagram from another perspective.

[0030] Figure 5 This is a low-voltage switchgear for an automatic switching, energy-saving smart grid. Figure 3 A schematic diagram of the decomposed part of the structure.

[0031] Figure 6 This is a low-voltage switchgear for an automatic switching, energy-saving smart grid. Figure 5 A partial structural diagram.

[0032] Figure 7 This is a low-voltage switchgear for an automatic switching, energy-saving smart grid. Figure 5 A structural diagram from another perspective.

[0033] Figure 8 This is a low-voltage switchgear for an automatic switching, energy-saving smart grid. Figure 7 A partially enlarged structural diagram.

[0034] Figure 9 This is a low-voltage switchgear for an automatic switching, energy-saving smart grid. Figure 6 A schematic diagram of a local structure.

[0035] Figure 10 This is a schematic diagram of the connection structure between the first conductor and the second conductor of an automatically switching, energy-saving smart grid low-voltage switchgear.

[0036] In the diagram: 1. Cabinet; 2. Base frame; 3. First conductor; 4. Second conductor; 5. First contact; 6. Second contact; 7. First guide seat; 8. First slide rod; 9. Second guide seat; 10. Second slide rod; 11. Electromagnetic actuator; 12. Push plate; 13. Rotating arm; 14. L-shaped connecting plate; 15. Rectangular frame; 16. Linkage slider; 17. First contact switch; 18. Second contact switch; 19. Rotating shaft; 20. Conductor; 21. Rotating rod; 22. Connecting rod; 23. Hinge rod; 24. Emergency mode indicator light; 25. Energy saving mode indicator light; 26. Metal plate; 27. Support seat; 28. Ball bearing. Detailed Implementation

[0037] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0038] Please see Figures 1-10 As an embodiment of the present invention, an automatic switching energy-saving smart grid low-voltage switchgear includes a cabinet 1, an automatic circuit switching device is provided inside the cabinet 1, the automatic circuit switching device includes a base frame 2 fixed inside the cabinet 1, a first conductor 3 connected to the main circuit is provided on the base frame 2, a second conductor 4 is connected in series on the first conductor 3, and a first contact 5 connected to the energy-saving module and a second contact 6 connected to the emergency power supply line without energy-saving function are respectively slidably provided on the base frame 2.

[0039] A rotating shaft 19 is rotatably mounted on the base frame 2, and a conductor 20 is mounted on the rotating shaft 19. The conductor 20 is electrically connected to an external power source. A first contact switch 17 and a second contact switch 18, which are fixed on the base frame 2, are respectively mounted on both sides of the conductor 20. An emergency mode indicator light 24, which is electrically connected to the first contact switch 17, and a power-saving mode indicator light 25, which is electrically connected to the second contact switch 18, are mounted on the outer wall of the cabinet 1.

[0040] The first contact 5, the second contact 6, and the rotating shaft 19 are connected by a linkage structure. When the first contact 5 slides to make electrical contact with the first conductor 3, the second contact 6 slides to disengage from the second conductor 4. The rotating shaft 19 rotates counterclockwise, causing the conductor 20 to disengage from the first contact switch 17 and make electrical contact with the second contact switch 18. The emergency mode indicator 24 goes out, and the power-saving mode indicator 25 lights up, switching to power-saving mode. When the first contact 5 slides to disengage from the first conductor 3, the second contact 6 slides to make electrical contact with the second conductor 4. The rotating shaft 19 rotates clockwise, causing the conductor 20 to disengage from the second contact switch 18 and make electrical contact with the first contact switch 17. The emergency mode indicator 24 lights up, and the power-saving mode indicator 25 goes out, switching to emergency mode.

[0041] In this embodiment, during use, when the power-saving module malfunctions or actively exits the power-saving mode, the first contact 5 connected to the power-saving module slides and disconnects from the first conductor 3 connected to the main circuit, automatically disconnecting the circuit with the power-saving module from the main circuit. At the same time, the second contact 6 connected to the emergency power supply line without power-saving function slides and contacts the second conductor 4, making the second contact 6 connected to the first conductor 3, directing the current to the emergency power supply line without power-saving function, and the circuit switches to emergency mode. The conductor 20 is disconnected from the second contact switch 18 and makes electrical contact with the first contact switch 17 by rotating the shaft 19 clockwise. The power-saving mode indicator 25 goes out, and the emergency mode indicator 24 lights up, indicating that the circuit is in emergency mode.

[0042] When it is necessary to switch back to power-saving mode, the first contact 5 connected to the power-saving module and the first conductor 3 connected to the main circuit come into contact, automatically connecting the power-saving module to the main circuit. At the same time, the second contact 6 connected to the emergency power supply line without power-saving function slides away from the second conductor 4, disconnecting the circuit between the second contact 6 and the first conductor 3, directing the current to the power supply line with the power-saving module, and the circuit switches to power-saving mode. The conductor 20 is disconnected from the first contact switch 17 and makes electrical contact with the second contact switch 18 by rotating the shaft 19 counterclockwise. The emergency mode indicator 24 goes out, and the power-saving mode indicator 25 lights up, indicating that the circuit is in power-saving mode.

[0043] As a further embodiment of the present invention, the first conductor 3 and the second conductor 4 are connected by a non-insulated metal plate 26, and the second conductor 4 is fixed on the base frame 2.

[0044] In this embodiment, the first conductor 3 and the second conductor 4 are connected by a non-insulated metal plate 26, so that the current can be stably transmitted between the first conductor 3 and the second conductor 4.

[0045] As a further embodiment of the present invention, the linkage structure includes a first slide rod 8 slidably disposed on the base frame 2 and fixed to the first contact 5, and a second slide rod 10 slidably disposed on the base frame 2 and fixed to the second contact 6. An electromagnetic driver 11 is provided on the base frame 2. The electromagnetic driver 11 includes a push plate 12 fixed to the first slide rod 8 at its output end. The push plate 12 is driven to reciprocate through the electromagnetic driver 11. The push plate 12 and the second contact 6 are connected by a first linkage mechanism. When the push plate 12 moves toward the side closer to the first conductor 3 and causes the first contact 5 to contact the first conductor 3, it will cause the second contact 6 to move toward the side away from the second conductor 4 so that the second contact 6 is disengaged from the second conductor 4. When the push plate 12 moves toward the side away from the first conductor 3 and causes the first contact 5 to disengage from the first conductor 3, it will cause the second contact 6 to move toward the side closer to the second conductor 4 so that the second contact 6 is in contact with the second conductor 4.

[0046] The push plate 12 and the rotating shaft 19 are connected by a second linkage mechanism. When the push plate 12 moves closer to the first conductor 3 and causes the first contact 5 to contact the first conductor 3, it will cause the rotating shaft 19 to rotate counterclockwise, causing the conductor 20 to detach from the first contact switch 17 and make electrical contact with the second contact switch 18. When the push plate 12 moves away from the first conductor 3 and causes the first contact 5 to detach from the first conductor 3, it will cause the rotating shaft 19 to rotate clockwise, causing the conductor 20 to detach from the second contact switch 18 and make electrical contact with the first contact switch 17.

[0047] In this embodiment, the electromagnetic actuator 11 is electrically connected to an external power supply via a wire. Activating the electromagnetic actuator 11 drives the push plate 12 to reciprocate. When the push plate 12 moves closer to the first conductor 3, causing the first contact 5 to contact the first conductor 3, it also drives the second contact 6 to move further away from the second conductor 4, causing the second contact 6 to disengage from the second conductor 4. Simultaneously, it causes the rotating shaft 19 to rotate counterclockwise, causing the conductor 20 to disengage from the first contact switch 17 and make electrical contact with the second contact switch 18. The push plate 12 moving further away from the first conductor 3 causes the first contact 5 to reciprocate. When the first contact 5 disengages from the first conductor 3, it causes the second contact 6 to move closer to the second conductor 4 so that the second contact 6 makes contact with the second conductor 4. At the same time, it causes the rotating shaft 19 to rotate clockwise so that the conductor 20 disengages from the second contact switch 18 and makes contact with the first contact switch 17. When the electromagnetic driver 11 is started, the reciprocating motion of its drive push plate 12 directly controls the sliding position of the first contact 5 and the second contact 6, ensuring that the switching between the power saving mode and the emergency mode is fast and accurate, avoiding power grid fluctuations caused by delays, and improving the reliability and response speed of the system.

[0048] As a further embodiment of the present invention, a first guide seat 7 and a second guide seat 9 are provided on the base frame 2, a first slide rod 8 is movably disposed through the first guide seat 7, and a second slide rod 10 is movably disposed through the second guide seat 9.

[0049] In this embodiment, the first guide seat 7 and the second guide seat 9 are used to constrain the sliding trajectory of the first slide bar 8 and the second slide bar 10, ensuring that the first contact 5 and the second contact 6 maintain linear motion during movement, reducing friction and positional deviation during movement, increasing the stability of the first contact 5 and the second contact 6 during movement in frequent switching mode, and reducing the structural wear of the first slide bar 8 and the second slide bar 10.

[0050] As a further embodiment of the present invention, the first linkage mechanism includes an L-shaped connecting plate 14 fixed to the push plate 12, a rotating arm 13 rotatably disposed on the base frame 2, one end of the rotating arm 13 being hinged to the L-shaped connecting plate 14, and the other end being provided with a linkage slider 16, and one end of the second slide rod 10 being provided with a rectangular frame 15, and the linkage slider 16 being movably engaged inside the rectangular frame 15.

[0051] In this embodiment, when the push plate 12 moves, it pushes the L-shaped connecting plate 14 to move and moves through the rotating arm 13 as a lever, causing the linkage slider 16 to slide inside the rectangular frame 15, thereby converting the vertical motion into the horizontal motion. When the second slide rod 10 moves, it causes the second contact 6 to move and contact or disengage from the second conductor 4.

[0052] As a further embodiment of the present invention, the second linkage mechanism includes a rotating rod 21 fixed on the rotating shaft 19 and a connecting rod 22 fixed to the push plate 12. A hinge rod 23 is provided between the connecting rod 22 and the rotating rod 21. One end of the hinge rod 23 is fixed to the rotating rod 21, and the other end is hinged to the connecting rod 22.

[0053] In this embodiment, the second linkage mechanism converts the linear motion of the push plate 12 into the rotation of the rotating shaft 19 through the hinge rod 23. When the connecting rod 22 moves with the push plate 12, the hinge rod 23 pulls the rotating rod 21, causing the rotating shaft 19 to rotate counterclockwise or clockwise, thereby precisely controlling the electrical contact between the conductor 20 and the first contact switch 17 or the second contact switch 18. This design simplifies the signal switching process, reduces mechanical complexity, and ensures that the on / off state of the emergency mode indicator 24 and the power saving mode indicator 25 is strictly synchronized with the circuit mode switching.

[0054] As a further embodiment of the present invention, a support seat 27 is provided on the base frame 2, a ball bearing 28 is movably sleeved on the rotating rod 21, and a rotating shaft 19 is rotatably mounted on the support seat 27, with the ball bearing 28 rolling on the surface of the support seat 27.

[0055] In this embodiment, the ball 28 rolls on the surface of the support 27. The support 27 supports the ball 28, which improves the smoothness of the rotation of the rotating rod 21, reduces friction loss and distributes the load force, and ensures that the rotation of the rotating shaft 19 is flexible and durable. Especially in long-term and frequent switching operation, it improves the high responsiveness and low wear of the indicating mechanism.

[0056] In use, when the power-saving module malfunctions or needs to be actively exited from power-saving mode, the electromagnetic driver 11 is activated to drive the push plate 12 to move away from the first conductor 3, causing the first contact 5 connected to the power-saving module and the first conductor 3 connected to the main circuit to disengage, automatically disconnecting the power-saving module from the main circuit. Simultaneously, the second contact 6 connected to the emergency power supply line without power-saving function is moved closer to the second conductor 4, so that the second contact 6 contacts the second conductor 4. Since the first conductor 3 and the second conductor 4 are connected in series, the second contact 6 is connected to the first conductor 3, directing current to the emergency power supply line without power-saving function, switching to emergency mode. At the same time, the rotating shaft 19 rotates clockwise, causing the conductor 20 to disengage from the second contact switch 18 and make contact with the first contact switch 17. The power-saving mode indicator 25 goes out, and the emergency mode indicator 24 lights up, indicating that the circuit is in emergency mode. Mode Status: When the circuit needs to be switched back to power-saving mode, the electromagnetic driver 11 is activated to drive the push plate 12 to move closer to the first conductor 3, causing the first contact 5 connected to the power-saving module and the first conductor 3 connected to the main circuit to make contact, automatically connecting the power-saving module to the main circuit. At the same time, the second contact 6 connected to the emergency power supply line without power-saving function is moved away from the second conductor 4 to disengage the second contact 6 from the second conductor 4. Since the first conductor 3 and the second conductor 4 are connected in series, the circuit between the second contact 6 and the first conductor 3 is disconnected, directing the current to the power supply line with the power-saving module, switching to power-saving mode. At the same time, the rotating shaft 19 rotates counterclockwise, causing the conductor 20 to disengage from the first contact switch 17 and make contact with the second contact switch 18. The emergency mode indicator 24 goes out, and the power-saving mode indicator 25 lights up to indicate that the circuit is in power-saving mode.

[0057] The above embodiments are exemplary and not restrictive. Therefore, any technical solutions that can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention are included within the scope of the present invention.

Claims

1. An automatically switching, energy-saving smart grid low-voltage switchgear, comprising a cabinet (1), characterized in that, The cabinet (1) is equipped with an automatic circuit switching device. The automatic circuit switching device includes a base frame (2) fixed inside the cabinet (1). A first conductor (3) connected to the main circuit is provided on the base frame (2). A second conductor (4) is connected in series on the first conductor (3). A first contact (5) connected to the power saving module and a second contact (6) connected to the emergency power supply line without power saving function are slidably provided on the base frame (2). A rotating shaft (19) is rotatably mounted on the base frame (2), and a conductor (20) is mounted on the rotating shaft (19). A first contact switch (17) and a second contact switch (18) fixed on the base frame (2) are respectively mounted on both sides of the conductor (20). An emergency mode indicator light (24) connected to the first contact switch (17) and a power saving mode indicator light (25) connected to the second contact switch (18) are mounted on the outer wall of the cabinet (1). The first contact (5), the second contact (6), and the rotating shaft (19) are connected by a linkage structure. When the first contact (5) slides to make electrical contact with the first conductor (3), the second contact (6) slides to disengage from the second conductor (4). The rotating shaft (19) rotates counterclockwise to make the conductor (20) disengage from the first contact switch (17) and make electrical contact with the second contact switch (18). The emergency mode indicator (24) turns off, and the power saving mode indicator (25) turns on, switching to power saving mode. When the first contact (5) slides to disengage from the first conductor (3), the second contact (6) slides to make electrical contact with the second conductor (4). The rotating shaft (19) rotates clockwise to make the conductor (20) disengage from the second contact switch (18) and make electrical contact with the first contact switch (17). The emergency mode indicator (24) turns on, and the power saving mode indicator (25) turns off, switching to emergency mode. The linkage structure includes a first slide rod (8) slidably mounted on the base frame (2) and fixed to the first contact (5), and a second slide rod (10) slidably mounted on the base frame (2) and fixed to the second contact (6). An electromagnetic actuator (11) is provided on the base frame (2). The electromagnetic actuator (11) includes a push plate (12) fixed to the first slide rod (8) at its output end. The electromagnetic actuator (11) drives the push plate (12) to reciprocate. The push plate (12) and the second contact (6) are connected by a first linkage mechanism. In conjunction with this, when the push plate (12) moves towards the side closer to the first conductor (3) and causes the first contact (5) to contact the first conductor (3), it will cause the second contact (6) to move towards the side farther from the second conductor (4) so ​​that the second contact (6) and the second conductor (4) are no longer in contact. When the push plate (12) moves towards the side farther from the first conductor (3) and causes the first contact (5) to disengage from the first conductor (3), it will cause the second contact (6) to move towards the side closer to the second conductor (4) so ​​that the second contact (6) and the second conductor (4) are in contact. The push plate (12) and the rotating shaft (19) are connected by a second linkage mechanism. When the push plate (12) moves closer to the first conductor (3) and causes the first contact (5) to contact the first conductor (3), it will cause the rotating shaft (19) to rotate counterclockwise so that the conductor (20) is separated from the first contact switch (17) and makes electrical contact with the second contact switch (18). When the push plate (12) moves away from the first conductor (3) and causes the first contact (5) to be separated from the first conductor (3), it will cause the rotating shaft (19) to rotate clockwise so that the conductor (20) is separated from the second contact switch (18) and makes electrical contact with the first contact switch (17).

2. The automatically switching, energy-saving smart grid low-voltage switchgear according to claim 1, characterized in that, The first conductor (3) and the second conductor (4) are connected by a non-insulated metal plate (26), and the second conductor (4) is fixed on the base frame (2).

3. The automatically switching, energy-saving smart grid low-voltage switchgear according to claim 1, characterized in that, The base frame (2) is provided with a first guide seat (7) and a second guide seat (9). The first slide rod (8) is movably inserted through the first guide seat (7), and the second slide rod (10) is movably inserted through the second guide seat (9).

4. The automatically switching, energy-saving smart grid low-voltage switchgear according to claim 1, characterized in that, The first linkage mechanism includes an L-shaped connecting plate (14) fixed to the push plate (12), a rotating arm (13) is rotatably provided on the base frame (2), one end of the rotating arm (13) is hinged to the L-shaped connecting plate (14), and the other end is provided with a linkage slider (16). One end of the second slide rod (10) is provided with a rectangular frame (15), and the linkage slider (16) is movably engaged inside the rectangular frame (15).

5. The automatically switching, energy-saving smart grid low-voltage switchgear according to claim 1, characterized in that, The second linkage mechanism includes a rotating rod (21) fixed on a rotating shaft (19) and a connecting rod (22) fixed to a push plate (12). A hinge rod (23) is provided between the connecting rod (22) and the rotating rod (21). One end of the hinge rod (23) is fixed to the rotating rod (21), and the other end is hinged to the connecting rod (22).

6. The automatically switching, energy-saving smart grid low-voltage switchgear according to claim 5, characterized in that, The base frame (2) is provided with a support seat (27), and a ball (28) is movably sleeved on the rotating rod (21). The rotating shaft (19) is rotatably mounted on the support seat (27), and the ball (28) rolls on the surface of the support seat (27).

7. A switching method for an automatically switching, energy-saving smart grid low-voltage switchgear as described in any one of claims 1-6, characterized in that, Includes the following steps, S1, when the power-saving module fails or actively exits the power-saving mode, the electromagnetic driver (11) is activated to drive the push plate (12) to move away from the first conductor (3), causing the first contact (5) connected to the power-saving module and the first conductor (3) connected to the main circuit to disengage, automatically disconnecting the power-saving module from the main circuit. At the same time, the second contact (6) connected to the emergency power supply line without power-saving function is moved closer to the second conductor (4) so ​​that the second contact (6) contacts the second conductor (4). Since the first conductor (3) and the second conductor (4) are connected in series, the second contact (6) and the first conductor (3) are connected in circuit, directing the current to the emergency power supply line without power-saving function to supply power, switching to the emergency mode. At the same time, the rotating shaft (19) rotates clockwise so that the conductor (20) disengages from the second contact switch (18) and makes electrical contact with the first contact switch (17). The power-saving mode indicator (25) goes out, and the emergency mode indicator (24) lights up to indicate the emergency mode status. S2, when it is necessary to switch back to the power saving mode, start the electromagnetic driver (11) to drive the push plate (12) to move closer to the first conductor (3) and drive the first contact (5) connected to the power saving module and the first conductor (3) connected to the main circuit to contact, automatically connect the power saving module to the main circuit, and at the same time drive the second contact (6) connected to the emergency power supply line without power saving function to move away from the second conductor (4) so ​​that the second contact (6) and the second conductor (4) are disconnected. Since the first conductor (3) and the second conductor (4) are connected in series, the circuit between the second contact (6) and the first conductor (3) is disconnected, and the current is directed to the power supply line with the power saving module to supply power, switch to the power saving mode, and at the same time the shaft (19) rotates counterclockwise so that the conductor (20) is disconnected from the first contact switch (17) and makes electrical contact with the second contact switch (18). The emergency mode indicator (24) goes out and the power saving mode indicator (25) lights up to indicate the power saving mode status.

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