An automatic transfer switch with neutral line overlap function

Abstract

An automatic transfer switch with a neutral line overlap function, characterized in that it comprises a first contact group and a second contact group, wherein the first contact group connects a main power supply and a load, and the second contact group connects a backup power supply and a load, and during the process of the automatic transfer switch switching from a closed-on state of the first contact group to a closed-on state of the second contact group, there is a state in which the neutral pole of the first contact group and the neutral pole of the second contact group are closed at the same time and the phase pole of the first contact group and the phase pole of the second contact group are disconnected at the same time; the entire automatic transfer switch has a simple and efficient structure, is stable and reliable, can provide high-quality continuous voltage during power switching, and is modularly designed and installed, which is more convenient for production, maintenance and replacement, and the use cost is greatly reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of low-voltage electrical appliances, and in particular relates to an automatic transfer switch with a neutral line overlapping function. Background Art

[0002] With the development of society, people's requirements for power grids and their transmission and distribution processes are gradually increasing. In some important power distribution occasions, the power supply system needs to ensure continuity to ensure power safety and uninterrupted production and life. The automatic transfer switch has two or more independent contact systems, which can control the connection / disconnection of the main power supply and backup power supply connected to it under the action of the controller, so that the transmission and distribution lines can be converted between the main power supply and the backup power supply. Therefore, the automatic transfer switch has been widely used in such occasions.

[0003] In some special power distribution occasions (such as data centers, etc.), automatic transfer switches and uninterruptible power supplies (UPS) are usually used in combination, where multiple mains power supplies (or dedicated generators) back up each other, and each power supply is switched through an automatic transfer switch. The load end is connected to the power end through the UPS in the data center, so that the mains power is supplied to the load. When one power supply is normal, the power supply is supplied to the load through the automatic transfer switch and the UPS; when a circuit fails, the automatic transfer switch disconnects this power supply, and connects another power supply (mains power or generator) to the UPS, and uses the other power supply to supply power to the load. During the conversion process of the automatic transfer switch, the UPS supplies power to the load for a short period of time to ensure that the power supply to the load end will not be interrupted.

[0004] Since the neutral pole and phase pole structure of ordinary automatic transfer switches are the same, the closing and opening states of each pole are consistent during the conversion process, that is, they are closed and opened at the same time; thus, during the process of the automatic transfer switch switching the two power sources, from the time when the neutral pole of the UPS is disconnected from the neutral pole of the previous power source to the time when it is connected to the neutral pole of the next power source, there is a brief moment when the neutral pole of the UPS is not connected to the neutral pole of any power source. The brief moment when the neutral pole of the UPS is not connected to the neutral pole of any power source will cause the neutral pole of the UPS to change relative to the ground potential, which will have an adverse effect on the load equipment, and even cause the load equipment (such as servers, etc.) to restart or data damage.

[0005] At present, in the actual power distribution process, there is another form of automatic transfer switch product, which is characterized by: during the power switching process, there is an overlapping state in which the neutral pole of the UPS and the neutral poles of the two power supplies are simultaneously connected, so that the neutral pole of the UPS and the neutral pole of the power supply will not be disconnected for a short moment. However, this implementation method has obvious disadvantages, the most important of which is that during the conversion process of the automatic transfer switch, there is an overlapping time process in which the phase pole of one power supply and the neutral pole of another power supply are closed at the same time, which will have an adverse effect on the voltage stability of the load end. At the same time, this design structure wiring is relatively complicated, which is not conducive to the modularization, miniaturization design and manufacturing of the product. Summary of the invention

[0006] The purpose of the present invention is to provide an automatic transfer switch with a neutral line overlapping function in order to address the technical defect of the low stability of the existing automatic transfer switches mentioned above, so that during the power conversion process of the automatic transfer switch, the neutral pole of one power supply and the neutral pole of another power supply are connected at the same time, and their phase poles are not connected; at the same time, when one circuit is in the connected state, the other circuit cannot be connected, thereby realizing the functional requirements of the automatic transfer switch.

[0007] Technical Solution

[0008] In order to achieve the above technical objectives, the present invention is designed to provide an automatic transfer switch with a neutral line overlap function, characterized in that: it includes a first contact group and a second contact group, the first contact group connects a main power supply and a load, the second contact group connects a backup power supply and a load, and during the automatic transfer switch switching from a closed-on state of the first contact group to a closed-on state of the second contact group, there is a state in which the neutral pole of the first contact group and the neutral pole of the second contact group are closed at the same time and the phase pole of the first contact group and the phase pole of the second contact group are disconnected at the same time;

[0009] The first contact group includes at least two stationary contacts, a main operating mechanism, a neutral pole moving contact, a phase pole moving contact and a reset element;

[0010] The second contact group comprises at least two second static contacts, a backup operating mechanism, a second neutral pole moving contact, a second phase pole moving contact and a second reset element;

[0011] The bracket group is installed on the base at a position on one side of the neutral pole moving contact 1 and the neutral pole moving contact 2, the neutral pole moving contact 1 is connected to a contact spring 1, the neutral pole moving contact 2 is connected to a contact spring 2, the connecting rod 1 is linked to the main shaft of the main operating mechanism and is limited by the bracket group so that it can slide between the main shaft of the main operating mechanism and the main shaft of the backup operating mechanism, the connecting rod 2 is linked to the backup operating mechanism and is limited by the bracket group so that it can slide between the main shaft of the main operating mechanism and the main shaft of the backup operating mechanism, the reset element 1 is installed between the neutral pole moving contact 1 and the bottom plate or between the neutral pole moving contact 1 and the base so that it can reset the neutral pole moving contact 1 when the mechanism is opened, and the reset element 2 is installed between the neutral pole moving contact 2 and the bottom plate or between the neutral pole moving contact 2 and the base so that it can reset the neutral pole moving contact 2 when the mechanism is opened.

[0012] Further, the main operating mechanism is configured to be able to drive the phase pole moving contact 1, the neutral pole moving contact 1 and the connecting rod 1 to move, and a phase pole cantilever 1 and a neutral pole cantilever 1 are provided on the mechanism main shaft of the main operating mechanism, and the phase pole cantilever 1 is connected to a connecting rod 1 of the phase pole moving contact 1 to control the closing and opening of the phase pole moving contact 1; a rolling member 1 is provided at one end of the neutral pole cantilever 1, and a shaft 1 is provided at the other end, and the rolling member 1 is in contact with a lever 1 of the neutral pole moving contact 1 to control the neutral pole moving contact 1 to perform a closing action, and the shaft 1 is linked with the connecting rod 1 to control the connecting rod 1 to slide between the mechanism main shaft of the main operating mechanism and the mechanism main shaft of the backup operating mechanism;

[0013] The backup operating mechanism is configured to be able to drive the movement of the phase pole moving contact 2, the neutral pole moving contact 2 and the connecting rod 2. The main shaft of the backup operating mechanism is provided with a phase pole cantilever 2 and a neutral pole cantilever 2. The phase pole cantilever 2 is connected to the connecting rod 2 of the phase pole moving contact 2 to control the closing and opening of the phase pole moving contact 2. One end of the neutral pole cantilever 2 is provided with a rolling member 2, and the other end is provided with a shaft 2. The rolling member 2 is in contact with the lever 2 of the neutral pole moving contact 2 to control the neutral pole moving contact 2 to perform a closing action. The shaft 2 is linked with the connecting rod 2 to control the connecting rod 2 to slide between the main shaft of the main operating mechanism and the main shaft of the backup operating mechanism.

[0014] Furthermore, the neutral pole moving contact 1 and the neutral pole moving contact 2 both include a contact bracket, a contact shaft 1 is installed in a space 1 on the contact bracket, one end of a contact lever is located in the space 1 and is fixedly installed with the contact bracket, one end of a rotating lever is located in the space 1 and is installed on the contact shaft 1 and can rotate around the contact shaft 1, a contact contact portion is installed at the bottom of the contact bracket, the contact bracket is installed on a fixed seat through a column shaft and can rotate around the column shaft, and during the rotation of the contact bracket, the first contact group and the second contact group are closed and disconnected through the contact contact portion and the corresponding static contact 1 and static contact 2.

[0015] Furthermore, a connecting shaft is provided on one end of the rotating lever located outside the space one, one end of the contact spring one or the contact spring two is mounted on the corresponding connecting shaft, and the other end is mounted on the bracket group or the base.

[0016] Furthermore, the main opening brake lever is installed on the base and located on one side of the main operating mechanism, and the main opening brake lever is provided with a main reset spring or a main reset spring piece, and the main opening brake lever can be linked with the main opening brake half-axis of the main operating mechanism. The spare opening brake lever is installed on the base and located on one side of the spare operating mechanism, and the spare opening brake lever is provided with a spare reset spring or a spare reset spring piece, and the spare opening brake lever can be linked with the spare opening brake half-axis of the spare operating mechanism.

[0017] Furthermore, the connecting rod 1 is provided with a hole 1 and a protrusion 1 which are hinged with the shaft 1. When the connecting rod 1 is linked with the main shaft of the main operating mechanism and slides, the protrusion 1 contacts the connecting shaft on the rotating lever of the neutral pole moving contact 2 and drives the rotating lever to rotate. The end of the connecting rod 1 contacts and contacts the spare opening lever during the sliding process.

[0018] One end of the second connecting rod is provided with a second hole and a second protrusion hinged with the second shaft. When the second connecting rod is linked with the standby operating mechanism and slides, the second protrusion contacts the connecting shaft on the rotating lever in the neutral pole moving contact 1 and drives the rotating lever to rotate. The end of the second connecting rod contacts and links with the main opening lever during the sliding process.

[0019] Furthermore, the bracket group includes bracket one and bracket two, and the bracket one and bracket two include a bracket limit seat, and the bracket limit seat is provided with a limit groove, and the rod bodies of the connecting rod one and the connecting rod two are located in the limit groove. The bracket limit seat is covered with a bracket plate, and the bracket limit seat is installed on the base.

[0020] Beneficial Effects

[0021] The present invention provides an automatic transfer switch with a neutral line overlap function, which enables the automatic transfer switch to have a state in which the neutral pole of one power supply and the neutral pole of another power supply are connected at the same time during the power conversion process, and their phase poles are not connected; at the same time, it also has a state in which when one circuit is in the connected state, the other circuit cannot be connected, thereby realizing the functional requirements of the automatic transfer switch. The entire automatic transfer switch has a simple and efficient structure, is stable and reliable, can provide high-quality continuous voltage during the power switching process, and is modularly designed and installed, which is more convenient for production, maintenance and replacement, and the use cost is greatly reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Attached Figure 1 The structure of the embodiment of the present invention is shown in FIG. Figure 1 ;

[0023] Attached Figure 2 The structure of the embodiment of the present invention is shown in FIG. Figure 2 ;

[0024] Attached Figure 3 It is a schematic diagram of the structure of the main operating mechanism in an embodiment of the present invention;

[0025] Attached Figure 4 2 is a schematic diagram of the structure of the standby operating mechanism in an embodiment of the present invention;

[0026] Attached Figure 5 The structure of the neutral pole moving contact 1 or the neutral pole moving contact 2 in the embodiment of the present invention is shown in FIG. Figure 1 ;

[0027] Attached Figure 6 The structure of the neutral pole moving contact 1 or the neutral pole moving contact 2 in the embodiment of the present invention is shown in FIG. Figure 2 ;

[0028] Attached Figure 7 It is a schematic diagram of the structure of the first phase moving contact or the second phase moving contact in an embodiment of the present invention;

[0029] Attached Figure 8 2 is a schematic diagram of the structure of a rotary lever in an embodiment of the present invention;

[0030] Attached Fig. 9 Schematic diagram of the structure of connecting rod 1 or connecting rod 2 in an embodiment of the present invention

[0031] Attached Fig.10 is a schematic diagram of the structure of a bracket 1 or a bracket 2 in an embodiment of the present invention;

[0032] Attached Fig.11 2 is a schematic diagram of the main opening lever structure in an embodiment of the present invention;

[0033] Attached Fig.12 This is a schematic diagram of the structure of the standby trip lever in an embodiment of the present invention:

[0034] Attached Fig.13 is a schematic diagram of an embodiment of the present invention in which both the first contact group and the second contact group are not connected;

[0035] Attached Fig.14 is a schematic diagram of a first contact group connected and a second contact group not connected in an embodiment of the present invention;

[0036] Attached Fig.15 is a schematic diagram of the first contact group after disconnection and connection in an embodiment of the present invention;

[0037] Attached Fig.16 is a schematic diagram of the overlap of the neutral poles during the transition from the first contact group being connected to the second contact group being connected in an embodiment of the present invention;

[0038] Attached Fig.17 It is a schematic diagram of the first contact group converted into the second contact group in the embodiment of the present invention. DETAILED DESCRIPTION

[0039] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0040] Example

[0041] This embodiment provides an automatic transfer switch with a neutral line overlap function, which includes a first contact group and a second contact group, wherein the first contact group connects a main power supply and a load, and the second contact group connects a backup power supply and a load, and during the automatic transfer switch switching from a closed-on state of the first contact group to a closed-on state of the second contact group, there is a state in which the neutral pole of the first contact group and the neutral pole of the second contact group are closed at the same time, and the phase pole of the first contact group and the phase pole of the second contact group are disconnected at the same time;

[0042] The specific structure of the above automatic transfer switch is further described in detail below:

[0043] As attached Figure 1 and 2 As shown, the first contact group includes at least two stationary contacts 1, a main operating mechanism 2, a neutral pole moving contact 3, a phase pole moving contact 4 and a reset element 5;

[0044] The second contact group comprises at least two stationary contacts 2 6, a backup operating mechanism 7, a neutral pole moving contact 2 8, a phase pole moving contact 2 9 and a reset element 2 10;

[0045] The bracket group 11 is installed on the base 12 at a position on one side of the neutral pole moving contact 1 3 and the neutral pole moving contact 2 8. The neutral pole moving contact 1 3 is connected to a contact spring 13, and the neutral pole moving contact 2 8 is connected to a contact spring 2 14. The connecting rod 15 is linked to the main shaft 201 of the main operating mechanism 2 and is limited by the bracket group 11 so that it can slide between the main shaft 201 of the main operating mechanism 2 and the main shaft 701 of the backup operating mechanism 7. The connecting rod 2 16 is linked to the backup operating mechanism 7 and is limited by the bracket The limit group 11 can slide between the main shaft 201 of the main operating mechanism 2 and the main shaft 701 of the backup operating mechanism 7. The reset element 15 is installed between the neutral pole moving contact 13 and the bottom plate 19 or between the neutral pole moving contact 13 and the base 12, and can reset the neutral pole moving contact 13 when the mechanism is opened. The reset element 2 10 is installed between the neutral pole moving contact 28 and the bottom plate 19 or between the neutral pole moving contact 28 and the base 12, and can reset the neutral pole moving contact 28 when the mechanism is opened.

[0046] As attached Figure 1 ,2 , 3 and 7, the main operating mechanism 2 is configured to be able to drive the phase pole moving contact 4, the neutral pole moving contact 3 and the connecting rod 15 to move, and a phase pole cantilever 201a and a neutral pole cantilever 201b are provided on the mechanism main shaft 201 of the main operating mechanism 2, and the phase pole cantilever 201a is connected to the connecting rod 401 of the phase pole moving contact 4 to control the closing and opening of the phase pole moving contact 4; a rolling member 201b01 is provided at one end of the neutral pole cantilever 201b, and a shaft 201b02 is provided at the other end, and the rolling member 201b01 is in contact with the lever 301 of the neutral pole moving contact 3 to control the neutral pole moving contact 3 to perform a closing action, and the shaft 201b02 is linked with the connecting rod 15 to control the connecting rod 15 to slide between the mechanism main shaft 201 of the main operating mechanism 2 and the mechanism main shaft 701 of the backup operating mechanism 7;

[0047] As attached Figure 4 and 7 As shown, the backup operating mechanism 7 is configured to be able to drive the phase pole moving contact 2 9, the neutral pole moving contact 2 8, and the connecting rod 2 16 to move. A phase pole cantilever 2 701a and a neutral pole cantilever 2 701b are provided on the mechanism main shaft 701 of the backup operating mechanism 7. The phase pole cantilever 2 701a is connected to the connecting rod 2 901 of the phase pole moving contact 2 9 to control the closing and opening of the phase pole moving contact 2 9. A rolling member 2 701b01 is provided at one end of the neutral pole cantilever 701b, and a shaft 2 701b02 is provided at the other end. The rolling member 2 701b01 is in contact with the lever 2 801 of the neutral pole moving contact 2 8 to control the neutral pole moving contact 2 8 to perform a closing action. The shaft 2 701b02 is linked with the connecting rod 2 16 to control the connecting rod 2 16 to slide between the mechanism main shaft 201 of the main operating mechanism 2 and the mechanism main shaft 701 of the backup operating mechanism 7.

[0048] As attached Figure 5 , 6As shown in Figure 8, the neutral pole moving contact 1 3 and the neutral pole moving contact 2 8 both include a contact bracket 381, 381', a contact shaft 1 382, ​​382' is mounted in a space 1 38101, 38101' on the contact bracket 381, 381', a contact lever 384, 384' one end is located in the space 1 38101, 38101' and is fixedly mounted together with the contact bracket 381, 381', and a rotating lever 385, 385' one end is located in the space 1 38101, 38101' and is mounted on the contact shaft 1 382, ​​382' The contact holder 381, 381' is mounted on a fixed seat 387, 387' via a column shaft 38102, 38102' and can rotate around the column shaft 38102, 38102'. During the rotation of the contact holder 381, 381', the first contact group and the second contact group are closed and disconnected through the contact contact portion 386, 386' and the corresponding stationary contact 1 and stationary contact 2 6. The rotating lever 385, 385' is provided with a connecting shaft 38501, 38501' at one end outside the space 1 38101, 38101'. One end of the contact spring 13 or the contact spring 2 14 is mounted on the corresponding connecting shaft 38501, 38501', and the other end is mounted on the bracket group 11 or the base 12.

[0049] As attached Figure 1 , 2 As shown in , 11 and 12, the main opening lever 17 is installed on the base 12 and is located on one side of the main operating mechanism 2. The main opening lever 17 is provided with a main reset spring or a main reset spring piece 1701. The main opening lever 17 can be linked with the main opening half-shaft 202 of the main operating mechanism 2. The spare opening lever 18 is installed on the base 12 and is located on one side of the spare operating mechanism 7. The spare opening lever 18 is provided with a spare reset spring or a spare reset spring piece 1801. The spare opening lever 18 can be linked with the spare opening half-shaft 702 of the spare operating mechanism 7.

[0050] As attached Fig. 9As shown, the connecting rod 15 is provided with a hole 1501 and a protrusion 1502 hinged with the shaft 201b02. When the connecting rod 15 is linked with the main shaft 201 of the main operating mechanism 2 and slides, the protrusion 1502 contacts the connecting shaft 38501' on the rotating lever 385' of the neutral pole moving contact 28 and drives the rotating lever 385' to rotate. The end of the connecting rod 15 during the sliding process is in contact with the spare opening lever 18. Contact linkage; one end of the connecting rod 16 is provided with a hole 1601 and a protrusion 1602 hinged with the shaft 701b02. During the sliding process of the connecting rod 16 linked with the standby operating mechanism 7, the protrusion 1602 contacts and links with the connecting shaft 38501 on the rotating lever 385 in the neutral pole moving contact 13 to drive the rotating lever 385 to rotate, and the end of the connecting rod 16 during the sliding process contacts and links with the main opening lever 17.

[0051] As attached Fig.10 As shown, the bracket group 11 includes a bracket 11a and a bracket 11b, and the bracket 11a and the bracket 11b include bracket limiting seats 110a, 110a', and the bracket limiting seats 110a, 110a' are provided with limiting grooves 110a01, 110a01', and the rod bodies of the connecting rod 15 and the connecting rod 2 16 are located in the limiting grooves 110a01, 110a01', and the bracket limiting seats 110a, 110a' are covered with bracket plates 110b, 110b', and the bracket limiting seats 110a, 110a' are installed on the base 12.

[0052] The working process of this embodiment is as follows: Fig.13 As shown, when both the first contact group and the second contact group are not connected, due to the action of the main operating mechanism 2 and the backup operating mechanism 7, the phase pole moving contact 4 and the phase pole moving contact 9 are not in contact with the corresponding static contact 1 and the static contact 2 6; at the same time, due to the action of the reset element 1 5 and the reset element 2 10, the neutral pole moving contact 3 and the neutral pole moving contact 2 8 are also not in contact with the corresponding static contact 1 and the static contact 2 6.

[0053] The main operating mechanism 2 is closed, and the main shaft 201 of the main operating mechanism 2 rotates clockwise, and the phase pole cantilever 201a links the phase pole moving contact 4 to rotate toward the static contact 1, so that the phase pole contact contact part 402 contacts the static contact 1 to close the circuit breaker; at the same time, the neutral pole moving contact 3 rotates toward the static contact 1 through the linkage effect of its rolling element 201b01 and the lever 301 on the neutral pole moving contact 3, and overcomes the effect of the reset element 5, so that the contact contact part 386 contacts the static contact 1 to close the circuit breaker; under the action of the contact spring 13, the rotating lever 385 rotates clockwise, and its groove part 38502 contacts the main shaft 201 of the main operating mechanism 2 and is limited there; as shown in the attached figure, Fig.14 As shown, at this time, the first contact group is connected and the second contact group is not connected.

[0054] As attached Fig.15 and 16 As shown, the main operating mechanism 2 is opened, and the main shaft 201 of the main operating mechanism 2 is linked with the phase pole moving contact 4 to rotate in the direction away from the static contact 1, and the phase pole contact contact part 402 is disconnected from the static contact 1, and the phase pole is disconnected and connected; due to the action of the contact spring 13, the rotating lever 385 is stably limited, and its groove part 1 38502 is in contact with the main shaft 201 of the main operating mechanism 2, and its other groove part 2 38503 is in contact with the main shaft 201 of the main operating mechanism 2, and the neutral pole moving contact 3 is continuously pressed, and the neutral pole is still in the connected state.

[0055] The standby operating mechanism 7 is closed, and the main shaft 701 of the standby operating mechanism 7 rotates counterclockwise, and the phase pole cantilever 701a links the phase pole moving contact 9 to rotate toward the static contact 6; the neutral pole cantilever 701b, through the linkage effect of its rolling element 701b01 and the lever 801 on the neutral pole moving contact 8, makes the neutral pole moving contact 8 overcome the action of the reset element 10 and rotate toward the static contact 6; at the same time, the neutral pole cantilever 701b is connected to the neutral pole moving contact 8. The second shaft 701b02 drives the second connecting rod 16, and makes the second connecting rod 16 slide in the direction of the first contact group; when the main shaft 701 of the standby operating mechanism 7 rotates through a certain angle (for example 20°), the contact part of the neutral pole moving contact 8 is in contact with the static contact 6, but the phase pole moving contact 9 has not yet contacted with the corresponding static contact 6; this state is that the neutral pole of the first contact group and the neutral pole of the second contact group are closed at the same time, and the phase pole of the first contact group and the phase pole of the second contact group are disconnected at the same time.

[0056] The main shaft 701 of the standby operating mechanism 7 continues to rotate counterclockwise through a certain angle (for example, 10°), and the neutral pole cantilever 2 701b links the connecting rod 2 16 through the shaft 2 701b02, and makes the connecting rod 2 16 continue to slide toward the first contact group. During the process, the protruding part 2 1602 of the connecting rod 2 16 links the connecting shaft 38501 on the neutral pole moving contact 1 3, overcomes the spring force of the contact spring 13, and links the rotating lever 385 to rotate counterclockwise, so that the groove part 1 38502 and the groove part 2 38503 are both separated from the main operating mechanism 2. The mechanism main shaft 201 contacts, releasing the pressure of the mechanism main shaft 201 on the neutral pole moving contact 3; the neutral pole moving contact 3 rotates away from the static contact 1 under the action of the reset element 5, and finally the neutral pole of the first contact group is disconnected; due to the action of the contact spring 214, the rotating lever 385' on the neutral pole moving contact 28 rotates counterclockwise and is stably limited to the position where its groove part 38502' contacts the mechanism main shaft 701 of the standby operating mechanism 7; during this period of time, the phase pole moving contact 29 is still not in contact with the static contact 26.

[0057] The mechanism main shaft 701 of the standby operating mechanism 7 continues to rotate counterclockwise and reaches the closing position. During this process, the neutral pole moving contact 8 remains connected with the static contact 6, and the phase pole moving contact 9 gradually connects with the static contact 6 and remains in a stable state; the working power of the automatic transfer switch is transferred from the first contact group to the second contact group, as shown in the attached figure. Fig.17 shown.

[0058] During the connection process of the first contact group, the main shaft 201 of the main operating mechanism 2 rotates clockwise, links the connecting rod 15 and makes it slide toward the second contact group. During the sliding process, the end of the connecting rod 15 links the trigger arm 1802 of the spare opening lever 18, overcomes the spring force of the spare reset spring or the spare reset spring 1801, and makes the spare opening lever 18 rotate clockwise; when the first contact group is connected in place, the connecting rod 15 also links the spare opening lever 18 to the maximum position and locks it in this position; at this time, the standby operating mechanism 7 cannot perform the closing operation.

[0059] During the connection process of the second contact group, the main shaft 701 of the standby operating mechanism 7 rotates counterclockwise, links the connecting rod 2 16 and makes it slide toward the first contact group. During the sliding process, the end of the connecting rod 2 16 links the trigger arm 1702 of the main opening lever 17, overcomes the spring force of its main reset spring or the main reset spring 1701, and makes the main opening lever 17 rotate counterclockwise; when the second contact group is connected in place, the connecting rod 2 16 also links the main opening lever 17 to the maximum position and locks it in this position; at this time, the main operating mechanism 2 cannot perform the closing operation.

[0060] The structures, proportions, sizes, quantities, etc. illustrated in the accompanying drawings of the embodiments of the present invention are only used to match the contents disclosed in the specification so as to be understood and read by those familiar with the technology, and are not used to limit the limiting conditions that the present invention can be implemented, so they have no substantial technical significance. Any modification of the structure, change of the proportional relationship, or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the effects that the present invention can produce and the purposes that can be achieved. At the same time, the terms such as "upper", "lower", "left", "right", "middle", "clockwise", "counterclockwise", etc. cited in this specification are only for the convenience of narration, and are not used to limit the scope of the implementation of the present invention. The change or adjustment of the relative relationship should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

Claims

1. An automatic transfer switch with a neutral line overlap function, characterized in that: It includes a first contact group and a second contact group, wherein the first contact group connects the main power supply and the load, and the second contact group connects the standby power supply and the load, and during the process of the automatic transfer switch switching from the closed-on state of the first contact group to the closed-on state of the second contact group, there is a state in which the neutral pole of the first contact group and the neutral pole of the second contact group are closed at the same time and the phase pole of the first contact group and the phase pole of the second contact group are disconnected at the same time; The first contact group comprises at least two stationary contacts (1), a main operating mechanism (2), a neutral pole moving contact (3), a phase pole moving contact (4) and a reset element (5); The second contact group comprises at least two second static contacts (6), a backup operating mechanism (7), a second neutral pole moving contact (8), a second phase pole moving contact (9) and a second reset element (10); The bracket group (11) is mounted on the base (12) at a position on one side of the neutral pole moving contact 1 (3) and the neutral pole moving contact 2 (8); the neutral pole moving contact 1 (3) is connected to a contact spring 1 (13); the neutral pole moving contact 2 (8) is connected to a contact spring 2 (14); the connecting rod 1 (15) is linked to the main shaft (201) of the main operating mechanism (2) and is limited by the bracket group (11) so as to be able to slide between the main shaft (201) of the main operating mechanism (2) and the main shaft (701) of the backup operating mechanism (7); the connecting rod 2 (16) is linked to the backup operating mechanism (7) and is limited by the bracket group (11) so as to be able to slide between the main shaft (201) of the main operating mechanism (2) and the main shaft (701) of the backup operating mechanism (7); The frame group (11) is limited to be able to slide between the mechanism main shaft (201) of the main operating mechanism (2) and the mechanism main shaft (701) of the backup operating mechanism (7); the reset element one (5) is installed between the neutral pole moving contact one (3) and the bottom plate (19) or between the neutral pole moving contact one (3) and the base (12) and can reset the neutral pole moving contact one (3) when the mechanism is opened; the reset element two (10) is installed between the neutral pole moving contact two (8) and the bottom plate (19) or between the neutral pole moving contact two (8) and the base (12) and can reset the neutral pole moving contact two (8) when the mechanism is opened.

2. An automatic transfer switch with neutral line overlap function as claimed in claim 1, characterized in that: The main operating mechanism (2) is configured to be able to drive the phase pole moving contact (4), the neutral pole moving contact (3) and the connecting rod (15) to move. A phase pole cantilever (201a) and a neutral pole cantilever (201b) are provided on the mechanism main shaft (201) of the main operating mechanism (2). The phase pole cantilever (201a) is connected to a connecting rod (401) of the phase pole moving contact (4) to control the closing and opening of the phase pole moving contact (4). One end of the neutral pole cantilever (201b) is connected to the connecting rod (401) of the phase pole moving contact (4). A rolling element (201b01) is provided at one end, and a shaft (201b02) is provided at the other end, the rolling element (201b01) is in contact with a lever (301) of a neutral pole moving contact (3) to control the neutral pole moving contact (3) to perform a closing action, and the shaft (201b02) is in contact with a connecting rod (15) to control the connecting rod (15) to slide between a mechanism main shaft (201) of a main operating mechanism (2) and a mechanism main shaft (701) of a backup operating mechanism (7); The backup operating mechanism (7) is configured to be able to drive the second phase pole moving contact (9), the second neutral pole moving contact (8), and the second connecting rod (16) to move. The mechanism main shaft (701) of the backup operating mechanism (7) is provided with a second phase pole cantilever (701a) and a second neutral pole cantilever (701b). The second phase pole cantilever (701a) is connected to the second connecting rod (901) of the second phase pole moving contact (9) to control the closing and opening of the second phase pole moving contact (9). One end of the second neutral pole cantilever (701b) is connected to the second connecting rod (901) of the second phase pole moving contact (9). A second rolling member (701b01) is provided, and a second shaft (701b02) is provided at the other end. The second rolling member (701b01) is in contact with a second lever (801) of a second neutral pole moving contact (8) to control the second neutral pole moving contact (8) to perform a closing action. The second shaft (701b02) is in contact with a second connecting rod (16) to control the second connecting rod (16) to slide between a mechanism main shaft (201) of a main operating mechanism (2) and a mechanism main shaft (701) of a backup operating mechanism (7).

3. An automatic transfer switch with neutral line overlap function as claimed in claim 2, characterized in that: The neutral pole moving contact 1 (3) and the neutral pole moving contact 2 (8) both include a contact support (381, 381'), a contact shaft 1 (382, 382') mounted in a space 1 (38101, 38101') on the contact support (381, 381'), one end of a contact lever (384, 384') located in the space 1 (38101, 38101') and fixedly mounted on the contact support (381, 381'), and one end of a rotating lever (385, 385') located in the space 1 (38101, 38101') and mounted on the contact shaft 1 (382, 382') to be able to rotate. The contact portion (386, 386') is mounted on the bottom of the contact bracket (381, 381') and is mounted on a fixed seat (387, 387') via a column shaft (38102, 38102') and can rotate around the column shaft (38102, 38102'). During the rotation of the contact bracket (381, 381'), the contact portion (386, 386') is connected and disconnected with the corresponding stationary contact 1 (1) and stationary contact 2 (6), thereby completing the closing and disconnection of the first contact group and the second contact group.

4. An automatic transfer switch with neutral line overlap function as claimed in claim 3, characterized in that: The rotating lever (385, 385') is provided with a connecting shaft (38501) at one end outside the space one (38101, 38101'); one end of the contact spring one (13) or the contact spring two (14) is mounted on the corresponding connecting shaft (38501, 38501'), and the other end is mounted on the bracket group (11) or the base (12).

5. The automatic transfer switch with neutral line overlap function as claimed in claim 3, characterized in that: A main opening brake lever (17) is mounted on the base (12) and is located on one side of the main operating mechanism (2); a main reset spring or a main reset spring piece (1701) is provided on the main opening brake lever (17); the main opening brake lever (17) can be linked with a main opening brake half shaft (202) of the main operating mechanism (2); a spare opening brake lever (18) is mounted on the base (12) and is located on one side of the spare operating mechanism (7); a spare reset spring or a spare reset spring piece (1801) is provided on the spare opening brake lever (18); the spare opening brake lever (18) can be linked with a spare opening brake half shaft (702) of the spare operating mechanism (7).

6. An automatic transfer switch with neutral line overlap function as claimed in claim 5, characterized in that: The connecting rod 1 (15) is provided with a hole 1 (1501) and a protrusion 1 (1502) which are hinged to the shaft 1 (201b02); when the connecting rod 1 (15) is linked to the main shaft (201) of the main operating mechanism (2) and slides, the protrusion 1 (1502) contacts the connecting shaft (38501') on the rotating lever (385') of the neutral pole moving contact 2 (8) to drive the rotating lever (385') to rotate; and the end of the connecting rod 1 (15) contacts and links with the spare opening lever (18) during the sliding process; One end of the second connecting rod (16) is provided with a second hole (1601) and a second protrusion (1602) hinged to the second shaft (701b02). When the second connecting rod (16) is linked with the backup operating mechanism (7) to slide, the second protrusion (1602) contacts the connecting shaft (38501) on the rotating lever (385) in the first neutral pole moving contact (3) to drive the rotating lever (385) to rotate. The end of the second connecting rod (16) contacts and links with the main opening lever (17) during the sliding process.

7. The automatic transfer switch with neutral line overlap function as claimed in claim 1, characterized in that: The bracket group (11) comprises a bracket one (11a) and a bracket two (11b), wherein the bracket one (11a) and the bracket two (11b) comprise bracket limiting seats (110a, 110a'), wherein the bracket limiting seats (110a, 110a') are provided with limiting grooves (110a01, 110a01'), wherein the rod bodies of the connecting rod one (15) and the connecting rod two (16) are located in the limiting grooves (110a01, 110a01'), wherein the bracket limiting seats (110a, 110a') are covered by bracket plates (110b, 110b'), and wherein the bracket limiting seats (110a, 110a') are mounted on a base (12).

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