An automatic transfer switch capable of maintenance without power interruption

Abstract

The utility model relates to automatic transfer switch technical field, concretely is a kind of automatic transfer switch that can be maintenance without power failure, including main ATS unit, frame body and circuit breaker, the circuit of main ATS unit is equipped with automatic transfer switch ATSE and bypass switch MTSE, when fault, switching bypass switch MTSE is continuous power supply for load, still include locking mechanism and trigger part, the locking mechanism has several, respectively set in main ATS unit left and right sides, when the main ATS unit is electrified, locking mechanism is in locking state, main ATS unit is fixed in frame body;When the main ATS unit is de-energized, locking mechanism is in unlocking state, main ATS unit is separated from frame body;The utility model when ATS occurs mechanical failure and needs power failure maintenance, load can be manually converted to bypass switch in advance, the ATS of fault moves out and is maintained, after completing maintenance, transfer switch can be re-moved into test position and carry out function test, and restore normal power supply, load can keep normal power supply in whole maintenance process.

Description

Technical Field

[0001] This utility model relates to the field of automatic transfer switch technology, and in particular to an automatic transfer switch that can be inspected and maintained without power interruption. Background Technology

[0002] In locations with extremely high requirements for power supply continuity, such as data centers, airports, hospitals, financial centers, communication hubs, and smart manufacturing, even a power outage of just a few minutes can cause huge economic losses or even safety accidents. Therefore, these locations use automatic transfer switches to connect to municipal power to ensure the continuity of power supply.

[0003] An Automatic Transfer Switch (ATS) is an intelligent control device used in power systems. Its core function is to monitor the status of two power sources (usually a "primary power source" and a "backup power source") in real time. When the primary power source (i.e., municipal power) fails, it can automatically switch the load circuit from the primary power source to the backup power source (such as a generator); when the primary power source returns to normal, it can automatically switch the load back to the primary power source.

[0004] The main ATS unit of the automatic transfer switch is connected to the cabinet via a guide rail for easy pull-out maintenance. However, traditional main ATS units do not have a power-on locking mechanism and can be pulled out even when energized, posing a significant safety hazard. Furthermore, existing automatic transfer switches require power outages for component replacement when encountering faults, and maintenance and testing under load are generally not permitted. However, if important loads are de-energized (even briefly), it can lead to not only economic losses but also safety issues. Therefore, we propose an automatic transfer switch that allows for maintenance and repair without power interruption. Summary of the Invention

[0005] The main objective of this invention is to provide an automatic transfer switch that can be inspected and maintained without power interruption, in order to solve the problems raised in related technologies.

[0006] To achieve the above objectives, according to one aspect of this utility model, an automatic transfer switch capable of uninterrupted power supply maintenance is provided, comprising a main ATS unit, a frame, and a circuit breaker. The main ATS unit's circuit includes an automatic transfer switch (ATSE) and a bypass switch (MTSE). In case of a fault, the bypass switch (MTSE) is switched to continuously supply power to the load. The system also includes: The locking mechanism comprises several units, which are respectively located on the left and right sides of the main ATS unit. When the main ATS unit is powered on, the locking mechanism is in a locked state, fixing the main ATS unit in the frame. When the main ATS unit is powered off, the locking mechanism is in an unlocked state, and the main ATS unit is separated from the frame. The triggering part is located on the top of the frame and below the handle of the circuit breaker. When the handle is raised, the locking mechanism is in the unlocked state; when the handle is pressed down, the locking mechanism is in the locked state.

[0007] Furthermore, the frame is fixedly installed inside the cabinet, the circuit breaker is fixedly installed outside the frame, and the main ATS unit is slidably installed inside the frame.

[0008] Furthermore, the main ATS unit has a horizontal groove on its side to accommodate the locking mechanism and a vertical groove on its top to accommodate the trigger part.

[0009] Furthermore, the triggering part includes a pressure rod, a spring plate, and a metal plate, with the spring plate located directly below the pressure rod and the metal plate located at the end of the spring plate.

[0010] Furthermore, a protruding post is fixedly provided at the bottom end of the pressure rod, and a first spring is sleeved around the outer ring of the protruding post.

[0011] Furthermore, the locking mechanism includes an electromagnet, a second spring, and a locking pin. One end of the second spring is fixedly connected to the electromagnet, and the other end is fixedly connected to the locking pin. The electromagnet is fixedly disposed in the transverse groove, and the locking pin is slidably disposed in the transverse groove.

[0012] Furthermore, a groove for accommodating the locking pin is provided on the inner side of the frame corresponding to the locking mechanism.

[0013] Compared with the prior art, the present invention has the following beneficial effects: When the ATS (Automatic Trainer) experiences a mechanical failure and requires power outage maintenance, this invention allows the load to be manually switched to a bypass switch in advance. The faulty ATS can then be removed for maintenance. After maintenance, the switch can be moved back to the test position for functional testing and normal power supply restored. Throughout the maintenance process, the load maintains normal power supply. A locking mechanism secures the frame and the main ATS unit. When the main ATS unit is de-energized, the locking pin of the locking mechanism retracts from the slot, allowing the main ATS unit to be pulled out of the frame for maintenance. When the main ATS unit is energized, the locking pin extends and locks into the slot, preventing the main ATS unit from being pulled out of the frame while energized, thus eliminating safety hazards. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall design of this utility model; Figure 2 This is a schematic diagram of the circuit breaker handle in the lifted state of this utility model; Figure 3 This is a schematic diagram of the circuit breaker handle in the depressed state of this utility model; Figure 4 This is a cross-sectional view of the present invention; Figure 5 This is a partially enlarged schematic diagram of the present invention. Figure 1 ; Figure 6 This is a partially enlarged schematic diagram of the present invention. Figure 2 ; Figure 7 This is a schematic diagram of the ATSE closing mechanism of this utility model; Figure 8 This is a schematic diagram of the ATSE and MTSE connected in series in this utility model. Figure 1 ; Figure 9 This is a schematic diagram of the ATSE tripping circuit breaker of this utility model; Figure 10 This is a schematic diagram of the ATSE extraction and MTSE power supply of this utility model; Figure 11 This is a schematic diagram of the ATSE insertion of this utility model; Figure 12 This is a schematic diagram of the ATSE and MTSE connected in series in this utility model. Figure 2 ; Figure 13 This is a schematic diagram of the MTSE tripping circuit breaker of this utility model.

[0015] Figure label: 1. Main ATS unit; 2. Frame; 3. Handle; 4. Circuit breaker; 5. Handle; 6. Linkage rod; 7. Pressure rod; 71. Protruding column; 8. Locking mechanism; 81. Electromagnet; 82. Second spring; 83. Locking pin; 9. First spring; 10. Vertical slot; 11. Spring plate; 12. Metal plate; 13. Horizontal slot; 14. Receiver slot; 15. Bypass switch; 16. Main terminal of main power supply; 17. Main terminal of load end; 18. Main terminal of backup power supply. Detailed Implementation

[0016] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0017] This embodiment provides an automatic transfer switch that can be inspected and maintained without power interruption, such as... Figure 2 and 3 As shown, it includes the main ATS unit 1, the frame 2, and the circuit breaker 4, as follows. Figure 4 As shown, it also includes: There are two locking mechanisms 8, which are respectively located on the left and right sides of the main ATS unit 1. When the main ATS unit 1 is powered on, the locking mechanism 8 is in the locked state, fixing the main ATS unit 1 inside the frame 2; when the main ATS unit 1 is powered off, the locking mechanism 8 is in the unlocked state, and the main ATS unit 1 is separated from the frame 2. The triggering part is located at the top of the frame 2 and below the handle 5 of the circuit breaker 4. For example... Figure 2 As shown, when handle 5 is lifted upwards, locking mechanism 8 is in the unlocked state; Figure 3 As shown, when the handle 5 is pressed down, the locking mechanism 8 is in the locked state. A connecting rod 6 is fixedly provided on the handle 5, and the end of the connecting rod 6 is located directly above the pressure rod 7. When the handle 5 is pressed down, the connecting rod 6 squeezes the pressure rod 7 and moves it downward; when the handle 5 is lifted, the connecting rod 6 no longer squeezes the pressure rod 7.

[0018] like Figure 1 As shown, the transfer switch body 1 is electrically connected to a bypass switch 15. The bypass switch 15 has a main power supply terminal 16, a load terminal 17, and a backup power supply terminal 18. The main power supply terminal 16 is connected to the main power supply via a wire, the backup power supply terminal 18 is connected to the backup power supply via a wire, and the load terminal 17 is connected to the load via a wire. Rotating the manual switch connects either the main power supply terminal 16 circuit or the backup power supply terminal 18 circuit. When the main power supply terminal 16 circuit is on, the main power supply supplies power to the load; when the backup power supply terminal 18 circuit is on, the backup power supply supplies power to the load.

[0019] The frame 2 is fixed inside the cabinet, the circuit breaker 4 is fixed outside the frame 2, and the main ATS unit 1 is slidably installed inside the frame 2. A handle 3 is fixedly installed at the front end of the main ATS unit 1 for easy pulling. The circuit breaker 4 is electrically connected to the main ATS unit 1 and is used to control the power supply status of the main ATS unit 1. When the handle 5 is raised, the main ATS unit 1 is de-energized, cutting off the main power supply, and the automatic transfer switch automatically switches to the backup power supply, allowing for maintenance. When the handle 5 is pressed down, the main ATS unit 1 is energized, the main power supply is connected, and the backup power supply is de-energized.

[0020] The main ATS unit 1 has a horizontal groove 13 on its side to accommodate the locking mechanism 8, and a vertical groove 10 on its top to accommodate the trigger part.

[0021] like Figure 4As shown, the triggering part includes a pressure rod 7, a spring plate 11, and a metal plate 12. The spring plate 11 is located directly below the pressure rod 7, and the metal plate 12 is located at the end of the spring plate 11. When the spring plate 11 is not under force, its end contacts the metal plate 12. When the spring plate 11 is under pressure, its end moves down and away from the metal plate 12. The spring plate 11 is made of metal and is connected in series with the electromagnet 81 via a wire. The metal plate 12 is connected in series with a battery via a wire and is also connected in series with the electromagnet 81. When the spring plate 11 contacts the metal plate 12, the circuit of the electromagnet 81 is closed, generating a magnetic field that attracts the locking pin 83 to compress the second spring 82. The locking pin 83 disengages from the receiving groove 14, and the locking mechanism 8 is in the unlocked state. When the spring plate 11 separates from the metal plate 12, the circuit of the electromagnet 81 is broken, the magnetic field disappears, the second spring 82 rebounds, and pushes the locking pin 83 into the receiving groove 14, and the locking mechanism 8 is in the locked state.

[0022] A protrusion 71 is fixedly provided at the bottom end of the pressure rod 7, and a first spring 9 is sleeved on the outer ring of the protrusion 71. The top end of the first spring 9 is fixedly connected to the pressure rod 7, and the bottom end is fixedly connected to the main ATS unit 1. The length of the protrusion 71 is greater than the length of the first spring 9 when it is compressed to its shortest length, but less than the length of the first spring 9 when it naturally extends, so as to ensure that when the first spring 9 is compressed, the protrusion 71 can push the spring plate 11 away from the metal plate 12.

[0023] like Figure 6 As shown, the locking mechanism 8 includes an electromagnet 81, a second spring 82, and a locking pin 83. One end of the second spring 82 is fixedly connected to the electromagnet 81, and the other end is fixedly connected to the locking pin 83. The electromagnet 81 is fixedly disposed in the transverse groove 13, and the locking pin 83 is slidably disposed in the transverse groove 13. The locking pin 83 is made of soft magnetic material. When the electromagnet 81 is energized, the attractive force of the electromagnet on the locking pin 83 is greater than the elastic force of the second spring 82, ensuring that the electromagnet 81 can pull the locking pin 83 out of the receiving groove 14. When the second spring 82 naturally extends, the front end of the locking pin 83 is located in the receiving groove 14, and the rear end is located in the transverse groove 13. This ensures that the locking mechanism 8 is in the locked state and that the locking pin 83 can be smoothly pulled out of the receiving groove 14 and into the transverse groove 13. The electromagnets 81 of the two locking mechanisms 8 are connected in series and can be energized and de-energized simultaneously.

[0024] A groove 14 for accommodating the locking pin 83 is provided on the inner side of the frame 2 at the location corresponding to the locking mechanism 8.

[0025] like Figures 7-13 As shown, the main ATS unit 1 circuit is equipped with an automatic transfer switch (ATSE) and a bypass switch (MTSE). During maintenance and repair without power interruption, the switching process between ATSE and MTSE is as follows: During normal operation, such as Figure 7 As shown, ATSE commonly uses power supply closing; When ATSE fails, such as Figure 8As shown, when the bypass switch N1 is closed manually, N1 and N2 will operate in parallel. like Figure 9 As shown, ATSE is tripped, and MTSE supplies power to the load; like Figure 10 As shown, the ATSE is removed for maintenance, and the MTSE supplies power to the load. like Figure 11 As shown, the ATSE has been repaired and moved to the testing position; like Figure 12 As shown, ATSE moves into the connection position, N2 closes, and at this time, N1 and N2 operate in parallel; like Figure 13 As shown, manually operate the MTSE to trip. The operation is now complete, and the ATSE maintenance is finished without power interruption.

[0026] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. An automatic transfer switch capable of being inspected and maintained without power interruption, comprising a main ATS unit (1), a frame (2), and a circuit breaker (4), characterized in that, The main ATS unit (1) is equipped with an automatic transfer switch ATSE and a bypass switch MTSE. In case of a fault, the bypass switch MTSE is switched to continuously supply power to the load. Also includes: The locking mechanism (8) has several units, which are respectively located on the left and right sides of the main ATS unit (1). When the main ATS unit (1) is powered on, the locking mechanism (8) is in the locked state, fixing the main ATS unit (1) inside the frame (2); when the main ATS unit (1) is powered off, the locking mechanism (8) is in the unlocked state, and the main ATS unit (1) is separated from the frame (2). The triggering part is located on the top of the frame (2) and below the handle (5) of the circuit breaker (4). When the handle (5) is lifted up, the locking mechanism (8) is in the unlocked state; when the handle (5) is pressed down, the locking mechanism (8) is in the locked state.

2. The automatic transfer switch capable of uninterrupted power supply maintenance according to claim 1, characterized in that, The frame (2) is fixed inside the cabinet, the circuit breaker (4) is fixed outside the frame (2), and the main ATS unit (1) is slidably installed inside the frame (2).

3. The automatic transfer switch capable of uninterrupted power supply maintenance according to claim 1, characterized in that, The main ATS unit (1) has a horizontal groove (13) on its side to accommodate the locking mechanism (8) and a vertical groove (10) on its top to accommodate the trigger part.

4. The automatic transfer switch capable of uninterrupted power supply maintenance according to claim 1, characterized in that, The triggering part includes a pressure rod (7), a spring plate (11) and a metal plate (12). The spring plate (11) is located directly below the pressure rod (7), and the metal plate (12) is located at the end of the spring plate (11).

5. The automatic transfer switch capable of uninterrupted power supply maintenance according to claim 4, characterized in that, The bottom end of the pressure rod (7) is fixedly provided with a protrusion (71), and a first spring (9) is sleeved on the outer ring of the protrusion (71).

6. The automatic transfer switch capable of uninterrupted power supply maintenance according to claim 3, characterized in that, The locking mechanism (8) includes an electromagnet (81), a second spring (82) and a locking pin (83). One end of the second spring (82) is fixedly connected to the electromagnet (81), and the other end is fixedly connected to the locking pin (83). The electromagnet (81) is fixedly installed in the transverse groove (13), and the locking pin (83) is slidably installed in the transverse groove (13).

7. The automatic transfer switch capable of uninterrupted power supply maintenance according to claim 6, characterized in that, The inner side of the frame (2) is provided with a groove (14) for accommodating the locking pin (83) at the location corresponding to the locking mechanism (8).

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