Disconnecting unit and dual power transfer switch with auxiliary shunt assembly

Abstract

A disconnect unit having an auxiliary shunt assembly includes a first power static contact, a second power static contact, a first electric force compensator, a second electric force compensator, a moving contact assembly, and a pigtail connected between the moving contact assembly and the first and second electric force compensators, housed in a disconnect unit housing; the auxiliary shunt assembly includes a first shunt component and a second shunt component; the first shunt component is connected to the first electric force compensator; the second shunt component is connected to the second electric force compensator; when the moving contact assembly contacts the first power static contact, the moving contact assembly contacts the first shunt component, and the current flowing through the first shunt component is greater than the current flowing through the pigtail; when the moving contact assembly contacts the second power static contact, the moving contact assembly contacts the second shunt component, and the current flowing through the second shunt component is greater than the current flowing through the pigtail. A dual power transfer switch includes the disconnect unit described above.

Description

Technical Field

[0001] The present disclosure relates to a disconnecting unit with an auxiliary shunt component. The present disclosure also relates to a dual power transfer switch, which includes the disconnecting unit with the auxiliary shunt component. Background Art

[0002] The short-time withstand current (ICW) is a critical performance parameter for dual-power transfer switches. A contact pressure compensation circuit can achieve a good ICW even with a snap-on contact structure, which boasts excellent electrical performance. However, the pigtail at the end of the moving contact still hinders its opening motion, thereby reducing its electrical performance.

[0003] The flexibility of the braid is linked to the opening speed of the moving contact. Technically, a sufficiently flexible braid is required, and the cross-sectional area of ​​the braid is a key factor in determining its flexibility. Technicians are striving to find a braid with a sufficiently small cross-sectional area. Summary of the Invention

[0004] The present disclosure adopts an auxiliary shunt component to help reduce the cross-sectional area of ​​the soft braid to the greatest extent, thereby achieving better flexibility and enabling the dual power conversion switch to obtain a higher opening speed, thereby having better electrical operating performance.

[0005] In order to solve one or more of the above-mentioned defects in the prior art, according to the first aspect of the present disclosure, a disconnecting unit with an auxiliary shunt assembly is provided, wherein the disconnecting unit includes a first power static contact, a second power static contact, a first electric power compensator, a second electric power compensator, a moving contact assembly and a soft pigtail connected between the moving contact assembly and the first electric power compensator and the second electric power compensator, which are accommodated in the disconnecting unit housing.

[0006] The auxiliary flow diverter assembly includes a first flow diverter component and a second flow diverter component.

[0007] The first shunt component is connected to the first electrodynamic compensator.

[0008] The second shunt component is connected to the second electric power compensator.

[0009] When the moving contact assembly contacts the first power static contact, the moving contact assembly contacts the first shunt component, and the current flowing through the first shunt component is greater than the current flowing through the pigtail.

[0010] When the moving contact assembly contacts the second power static contact, the moving contact assembly contacts the second shunt component, and the current flowing through the second shunt component is greater than the current flowing through the pigtail.

[0011] According to the above-mentioned first aspect of the present disclosure, the first current-carrying component includes a first elastic current-carrying member made of a conductive material and a first contact point provided on one end of the first elastic current-carrying member.

[0012] The other end of the first elastic current-carrying member is connected to the first electrodynamic compensator.

[0013] The second current-dividing component includes a second elastic current-carrying member made of a conductive material and a second contact point arranged on one end of the second elastic current-carrying member.

[0014] The other end of the second elastic current-carrying member is connected to the second electrodynamic compensator.

[0015] According to a second aspect of the present disclosure, the first shunt component includes a first shunt contact piece, a first shunt spring, and a first shunt braid.

[0016] The lower end of the first shunt contact piece is pivotally connected to the disconnect unit housing, and the upper end of the first shunt contact piece is provided with a first shunt contact surface in contact with the moving contact assembly and a first shunt motion range limiting surface cooperating with the disconnect unit housing. The first shunt spring applies a force to the first shunt contact piece so that the first shunt contact piece is attached toward the moving contact assembly and provides contact pressure therebetween. The lower end of the first shunt contact piece is also connected to the first electric power compensation component through a first shunt braid.

[0017] The second shunt component includes a second shunt contact piece, a second shunt spring and a second shunt braid.

[0018] The lower end of the second shunt contact piece is pivotally connected to the disconnect unit housing, and the upper end of the second shunt contact piece is provided with a second shunt contact surface in contact with the moving contact assembly and a second shunt motion range limiting surface cooperating with the disconnect unit housing. The second shunt spring applies a force to the second shunt contact piece so that the second shunt contact piece is attached toward the moving contact assembly and provides contact pressure therebetween. The lower end of the second shunt contact piece is also connected to the second electric power compensation component through a second shunt braid.

[0019] According to the above-mentioned second aspect of the present disclosure, the force applied by the first shunt contact passes through the pivot center of the moving contact assembly, so that the contact pressure between the first shunt contact and the moving contact assembly does not reduce the contact pressure between the moving contact assembly and the first power static contact, and at the same time does not hinder the opening of the moving contact assembly relative to the first power static contact.

[0020] The force applied by the second shunt contact passes through the pivot center of the moving contact assembly, so that the contact pressure between the second shunt contact and the moving contact assembly does not reduce the contact pressure between the moving contact assembly and the second power static contact, and does not hinder the opening of the moving contact assembly relative to the second power static contact.

[0021] According to the above-mentioned first and second aspects of the present disclosure, when the moving contact assembly contacts the first power static contact, the current direction on the first electric force compensator is consistent with the current direction on the moving contact assembly, thereby generating mutually attractive electric force, and then forming a torque that drives the moving contact assembly to rotate, so as to increase the contact pressure between the moving contact assembly and the first power static contact.

[0022] When the moving contact assembly contacts the second power static contact, the direction of the current on the second electric force compensation member is consistent with the direction of the current on the moving contact assembly, thereby generating an electric force of mutual attraction, and then forming a torque that drives the moving contact assembly to rotate, so as to increase the contact pressure between the moving contact assembly and the second power static contact.

[0023] When the current increases, the electromotive force increases.

[0024] According to the above-mentioned first and second aspects of the present disclosure, the moving contact assembly rotates between a first position and a second position.

[0025] When in the first position, the moving contact assembly is in contact with the first power static contact.

[0026] In the second position, the moving contact assembly contacts the second power static contact.

[0027] According to the above-mentioned first and second aspects of the present disclosure, the first power static contact, the second power static contact, the first electric force compensator, and the second electric force compensator are arranged to substantially surround the movable contact assembly.

[0028] According to the above-mentioned first and second aspects of the present disclosure, the first electrodynamic compensator includes a first current inlet terminal, a first current path section, a first electrodynamic compensation section and a first load terminal section.

[0029] According to the above-mentioned first and second aspects of the present disclosure, the second electrodynamic compensator includes a second current inlet terminal, a second current path section, a second electrodynamic compensation section and a second load terminal section.

[0030] According to the above-mentioned first and second aspects of the present disclosure, the moving contact assembly includes a moving contact support and moving contact fingers mounted on the moving contact support.

[0031] The movable contact finger and the movable contact bracket have the same pivot center position or different pivot center positions.

[0032] According to the above-mentioned first aspect of the present disclosure, one end of the movable contact finger is connected to the first current entry end and the second current entry end through a pigtail wire.

[0033] The first elastic current-carrying member is connected to the first current inlet terminal.

[0034] The second elastic current-carrying member is connected to the second current inlet terminal.

[0035] According to the above second aspect of the present disclosure, one end of the moving contact finger is connected to the first current entry end and the second current entry end through a pigtail.

[0036] The first shunt contact piece is connected to the first current inlet terminal through the first shunt braid.

[0037] The second shunt contact piece is connected to the second current inlet terminal through the second shunt braid.

[0038] According to the first aspect of the present disclosure, when the movable contact assembly is in the first position, current flows through the movable contact finger, the flexible braid and the first elastic current-carrying member connected in parallel, the first current entry end, the first current path section, the first electrodynamic compensation section, and the first load terminal section, and the direction of the current flowing through the first electrodynamic compensation section is consistent with the direction of the current flowing through the movable contact finger;

[0039] When the moving contact assembly is in the second position, current flows through the moving contact fingers, the soft pigtails and the second elastic current-carrying member connected in parallel, the second current entry end, the second current path section, the second electrodynamic compensation section and the second load terminal section, and the direction of the current flowing through the second electrodynamic compensation section is consistent with the direction of the current flowing through the moving contact fingers.

[0040] According to the second aspect of the present disclosure, when the movable contact assembly is in the first position, current flows through the movable contact finger, the parallel-connected soft pigtail and the first shunt contact piece and the first shunt pigtail, the first current entry end, the first current path section, the first electrodynamic compensation section, and the first load terminal section, and the direction of the current flowing through the first electrodynamic compensation section is consistent with the direction of the current flowing through the movable contact finger;

[0041] When the moving contact assembly is in the second position, the current flows through the moving contact finger, the soft braid connected in parallel and the second shunt contact piece and the second shunt braid, the second current entry end, the second current path section, the second electrodynamic compensation section and the second load terminal section, and the direction of the current flowing through the second electrodynamic compensation section is consistent with the direction of the current flowing through the moving contact finger.

[0042] According to the above-mentioned first and second aspects of the present disclosure, at least one magnetic conductor is provided on each of the first electrodynamic compensation section and the second electrodynamic compensation section.

[0043] According to another aspect of the present disclosure, a dual power transfer switch is provided, wherein the dual power transfer switch includes at least one disconnecting unit as described above.

[0044] By shunting the current, the current that the soft braid needs to carry is very small, so it can have a smaller cross-sectional area to obtain better softness. Therefore, when the moving contact opens, the resistance affecting the movement of the moving contact is greatly reduced, ensuring the opening speed and thus improving the electrical operating performance of the switch.

[0045] Thus far, in order that the detailed description of the present disclosure herein may be better understood, and in order that the contribution of the present disclosure to the prior art may be better appreciated, the present disclosure has generally outlined the contents of the present disclosure. Of course, embodiments of the present disclosure will be described below and will form the subject matter of this document.

[0046] Likewise, it will be appreciated by those skilled in the art that the conception upon which this disclosure is based can be readily used as a basis for designing other structures, methods, and systems for carrying out the several purposes of this disclosure. Therefore, it is important that this document be construed as including such equivalent structures as long as they do not exceed the spirit and scope of this disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] The following drawings will provide a better understanding of the present disclosure and more clearly demonstrate the advantages of the present disclosure. The drawings described herein are for illustrative purposes only of selected embodiments, not all possible implementations, and are not intended to limit the scope of the present disclosure.

[0048] Figures 1 to 3 A schematic diagram showing various components of a breaking unit according to the present disclosure, wherein the auxiliary diverter assembly is omitted;

[0049] Figures 4 and 5 shows a wireframe schematic diagram of a breakout unit according to the present disclosure;

[0050] Figure 6 Schematically illustrates a plurality of disconnecting units with electrodynamic compensation according to the present disclosure;

[0051] Figure 7 A schematic diagram showing various components of a breaking unit according to the present disclosure, including an auxiliary diversion assembly according to one embodiment of the present disclosure;

[0052] Figure 8 A schematic diagram showing various components of a breaking unit according to the present disclosure is shown, including an auxiliary diversion assembly according to another embodiment of the present disclosure. DETAILED DESCRIPTION

[0053] The specific implementation of the present disclosure will be described in detail below with reference to the accompanying drawings.

[0054] As the main structure of ATSE, the architecture of the disconnect unit is directly related to the key performance of ATSE, such as: usage category, short-time withstand current, etc.; as well as customer maintenance functions such as contact wear inspection.

[0055] The architecture of the disconnecting unit of this technology consists of two parts: a single-pole architecture and a multi-pole architecture. Figures 1 to 5 A typical monopole architecture is shown.

[0056] There are two static contacts in the housing of a disconnect unit, which are connected to the incoming connection terminals of two power supplies respectively. Figure 4 The common arc extinguishing chamber 10 shown (or Figure 5 The two separate arc-extinguishing chambers 10 shown in FIG. Movable contact fingers are located below the arc-extinguishing chambers and between the two stationary contacts. Electrodynamic compensation circuits are located on either side of the moving contact fingers to maintain contact pressure against the stationary contacts during a short-circuit event, resulting in a higher short-time withstand current performance. Electrical connections are established between the moving contact fingers and the compensation circuit, with terminals for connecting to the load at the rear end of the compensation circuit. Consequently, operating current and short-circuit current flow from the first or second power supply input side through the stationary contacts, the moving contact fingers, and the compensation circuit before flowing to the load through the load terminals.

[0057] According to one embodiment of the present disclosure, Figures 1 to 3As shown, a disconnecting unit A with electric power compensation is provided, wherein the disconnecting unit includes a first power static contact 1, a second power static contact 2, a first electric power compensator 5, a second electric power compensator 6, a moving contact assembly, and a soft pigtail 7 connected between the moving contact assembly and the first electric power compensator 5 and the second electric power compensator 6, which are accommodated in a disconnecting unit housing 9.

[0058] The moving contact assembly is pivotally arranged on the disconnect unit housing 9 .

[0059] The first power static contact 1 , the second power static contact 2 , the first electric force compensator 5 , and the second electric force compensator 6 are fixedly arranged on the disconnect unit housing 9 .

[0060] The first power static contact 1 is connected to a corresponding first power source (not shown). The second power static contact 2 is connected to a corresponding second power source (not shown).

[0061] When the moving contact assembly contacts the first power static contact 1, the direction of the current on the first electric force compensator 5 is consistent with the direction of the current on the moving contact assembly, thereby generating an electric force of mutual attraction, and then forming a torque that drives the moving contact assembly to rotate, so as to increase the contact pressure between the moving contact assembly and the first power static contact 1.

[0062] When the moving contact assembly contacts the second power static contact 2 (as Figure 3 ), the direction of the current on the second electric force compensator 6 is consistent with the direction of the current on the moving contact assembly, thereby generating an electric force of mutual attraction, and then forming a torque that drives the moving contact assembly to rotate, so as to increase the contact pressure between the moving contact assembly and the second power static contact 2.

[0063] The breaking unit further includes an auxiliary flow dividing assembly (such as Figure 7 and Figure 8 The auxiliary flow diversion component includes a first flow diversion component 12 and a second flow diversion component 13.

[0064] The first diversion component 12 is connected to the first electric power compensator 5 .

[0065] The second diversion component 13 is connected to the second electric power compensator 6 .

[0066] When the moving contact assembly contacts the first power static contact 1 , the moving contact assembly contacts the first shunt component 12 , and the current flowing through the first shunt component 12 is greater than the current flowing through the pigtail 7 .

[0067] When the moving contact assembly contacts the second power static contact 2 , the moving contact assembly contacts the second shunt component 13 , and the current flowing through the second shunt component 13 is greater than the current flowing through the pigtail 7 .

[0068] According to the above embodiment of the present disclosure, the first diverter component 12 includes a first elastic current-carrying member 12 - 2 made of a conductive material and a first contact 12 - 1 provided on one end of the first elastic current-carrying member 12 - 2 .

[0069] The other end of the first elastic current-carrying member 12 is connected to the first electrodynamic compensator.

[0070] The second current-carrying component 13 includes a second elastic current-carrying member 13 - 2 made of a conductive material and a second contact 13 - 1 provided on one end of the second elastic current-carrying member 13 - 2 .

[0071] The other end of the second elastic current-carrying member 13 - 2 is connected to the second electrodynamic compensator.

[0072] According to another embodiment of the present disclosure (such as Figure 8 ), the first shunt component includes a first shunt contact 14, a first shunt spring 15 and a first shunt braid 16.

[0073] The lower end of the first shunt contact piece 14 is pivotally connected to the disconnect unit housing 9, and the upper end of the first shunt contact piece 14 is provided with a first shunt contact surface 14-1 in contact with the moving contact assembly and a first shunt motion range limiting surface 14-2 cooperating with the disconnect unit housing 9. The first shunt spring 15 applies a force to the first shunt contact piece 14 so that the first shunt contact piece 14 is attached toward the moving contact assembly and provides contact pressure therebetween. The lower end of the first shunt contact piece 14 is also connected to the first electric power compensation component 5 through a first shunt braid 16.

[0074] The second shunt component includes a second shunt contact piece 17 , a second shunt spring 18 and a second shunt braid 19 .

[0075] The lower end of the second shunt contact piece 17 is pivotally connected to the disconnect unit housing 9, and the upper end of the second shunt contact piece 17 is provided with a second shunt contact surface 17-1 in contact with the moving contact assembly and a second shunt motion range limiting surface 17-2 cooperating with the disconnect unit housing 9. The second shunt spring 18 applies a force to the second shunt contact piece 17 so that the second shunt contact piece 17 is attached toward the moving contact assembly and provides contact pressure therebetween. The lower end of the second shunt contact piece 17 is also connected to the second electric power compensation component 6 through a second shunt braid 19.

[0076] According to the above-mentioned another embodiment of the present disclosure, the force applied by the first shunt contact 14 passes through the pivot center of the moving contact assembly, so that the contact pressure between the first shunt contact 14 and the moving contact assembly does not reduce the contact pressure between the moving contact assembly and the first power static contact 1, and does not hinder the opening of the moving contact assembly relative to the first power static contact 1.

[0077] The force applied by the second shunt contact 17 passes through the pivot center of the moving contact assembly, so that the contact pressure between the second shunt contact 17 and the moving contact assembly does not reduce the contact pressure between the moving contact assembly and the second power static contact 2, and does not hinder the opening of the moving contact assembly relative to the second power static contact 2.

[0078] According to the above-described various embodiments of the present disclosure, when the current increases, the electric force increases.

[0079] According to the above various embodiments of the present disclosure, the moving contact assembly rotates between a first position and a second position.

[0080] When in the first position, the moving contact assembly is in contact with the first power static contact 1 .

[0081] In the second position, the moving contact assembly is in contact with the second power static contact 2 .

[0082] According to the above-mentioned various embodiments of the present disclosure, the first power static contact 1, the second power static contact 2, the first electric force compensator 5, and the second electric force compensator 6 are arranged to substantially surround the movable contact assembly.

[0083] According to the above-mentioned various embodiments of the present disclosure, the first electrodynamic compensator 5 includes a first current inlet terminal 5-1, a first current path section 5-2, a first electrodynamic compensation section 5-3 and a first load terminal section 5-4.

[0084] According to the above-mentioned various embodiments of the present disclosure, the second electrodynamic compensator 6 includes a second current inlet terminal 6-1, a second current path section 6-2, a second electrodynamic compensation section 6-3 and a second load terminal section 6-4.

[0085] According to the above-mentioned various embodiments of the present disclosure, the moving contact assembly includes a moving contact bracket 3 and a moving contact finger 4 mounted on the moving contact bracket 3 .

[0086] The movable contact finger 4 and the movable contact bracket 3 have the same pivot center position (as shown in FIG. Figure 1 and Figure 3 as shown) or different pivot center positions (as shown Figure 2 shown).

[0087] According to the above-mentioned various embodiments of the present disclosure, one end of the movable contact finger 4 is connected to the first current entry end and the second current entry end through a pigtail 7 .

[0088] According to the above embodiment of the present disclosure, the first elastic current-carrying member 12 - 2 is connected to the first current inlet terminal 5 - 1 ; and the second elastic current-carrying member 13 - 2 is connected to the second current inlet terminal 6 - 1 .

[0089] According to the above embodiments of the present disclosure, when the moving contact assembly is in the first position under the action of the ATSE operating mechanism (not shown), the current flows through the moving contact finger 4, Figure 7 The braided wire 7 and the first elastic current-carrying member 12-2 (or the Figure 8 The soft braid 7 and the first shunt contact 14 and the first shunt braid 16 connected in parallel as shown), the first current entry end 5-1, the first current path section 5-2, the first electric force compensation section 5-3 and the first load terminal section 5-4, wherein the direction of the current flowing through the first electric force compensation section 5-3 is consistent with the direction of the current flowing through the moving contact finger 4, thereby generating an electric force that attracts each other, and then forming a torque that drives the moving contact assembly (the moving contact finger 4) to rotate, so as to prevent the moving contact finger from being repelled, thereby increasing the contact pressure between the moving contact assembly (the moving contact finger 4) and the first power static contact 1.

[0090] When the moving contact assembly is in the second position under the action of the ATSE operating mechanism (not shown), the current flows through the moving contact fingers 4, Figure 7 The pigtail 7 and the second elastic current-carrying member 13-2 (or the second elastic current-carrying member 13-2) are connected in parallel as shown. Figure 8 The soft braid 7 and the second shunt contact 17 and the second shunt braid 19 connected in parallel as shown), the second current entry end 6-1, the second current path section 6-2, the second electric power compensation section 6-3 and the second load terminal section 6-4, wherein the direction of the current flowing through the second electric power compensation section 6-3 is consistent with the direction of the current flowing through the moving contact finger 4 (as shown in FIG. Figure 3 As shown by the dotted arrow in the figure), an electric force of mutual attraction is generated, thereby forming a torque (in the figure) that drives the moving contact assembly (the moving contact finger 4) to rotate. Figure 3 A clockwise torque is generated in the moving contact finger) to prevent the counterclockwise rotation of the moving contact finger, that is, the repulsion of the contacts, thereby increasing the contact pressure between the moving contact assembly (the moving contact finger 4) and the second power static contact 2.

[0091] by Figure 7 Taking this as an example, the working mode of this breaking unit is explained in detail.

[0092] Working mode under normal current:

[0093] Current distribution:

[0094] A small part of the current: (current flows in) second power static contact 2 → moving contact finger 4 → soft braid 7 → second electric power compensation component 6 (current flows out)

[0095] Most of the current flows in: (current flows in) second power static contact 2 → moving contact finger 4 → second elastic current-carrying member 13-2 → second electric power compensation member 6 (current flows out)

[0096] In this disclosure, the first and second elastic current-carrying members 12-2, 13-2 are made relatively thick, while the braided wire 7 is thin. This ensures that the second elastic current-carrying member 13-2 receives the majority of the current in the parallel circuit. Furthermore, each contact point on the moving contact finger 4 has a normal contact pressure (e.g., 30N), resulting in a low temperature rise and ensuring normal operation of the switch.

[0097] Open operation:

[0098] The moving contact assembly is driven by the operating mechanism (not shown). Figure 7 In the illustrated state, counterclockwise rotation disconnects the movable contact finger 4 from the second power static contact 2 and the second elastic current-carrying member 13-2. An arc then forms between the movable contact finger 4 and the second power static contact 2, while no arc forms between the movable contact finger 4 and the second elastic current-carrying member 13-2 (current flows through the pigtail 7). Due to the small cross-section of the pigtail 7, it is relatively flexible and does not hinder the movement of the movable contact finger 4, allowing it to open quickly, extending the arc and thus quickly extinguishing it, achieving high electrical performance. The closing operation is the opposite of the opening operation and will not be described in detail here.

[0099] Working mode under short-circuit current:

[0100] Carrying capacity (Icw): Most of the current flows in from the second power static contact 2 → the moving contact finger 4 → the second elastic current-carrying member 13-2 → and finally flows out from the second electric force compensator 6. An electric force is generated between the second electric force compensation section 6-3 and the moving contact finger 4, causing the moving contact finger 4 to rotate clockwise, thereby increasing the contact pressure between the moving contact finger 4 and the second power static contact 2, so that they remain closed (not repelled). Then, the second elastic current-carrying member 13-2 is repelled by the action of the electric force, so that all the current flows in through the second power static contact 2 → the moving contact finger 4 → the pigtail 7 → and finally flows out from the second electric force compensator 6. Afterwards, since the current flowing through the second elastic current-carrying member 13-2 disappears, the second elastic current-carrying member 13 is reclosed with the moving contact finger 4, and the current flows as it did at the beginning. This process is repeated. The second elastic current-carrying member 13-2 and the pigtail 7 alternately carry large currents, meeting the performance requirements of the product.

[0101] Short circuit connection (Icm): The moving contact finger 4 is in the vertical middle position and reaches the Figure 7 The closed position is shown. Most of the current then flows in from the second power static contact 2 → the moving contact finger 4 → the second elastic current-carrying member 13-2 → and finally flows out from the second electric force compensator 6. An electric force is generated between the second electric force compensation section 6-3 and the moving contact finger 4, causing the moving contact finger 4 to rotate clockwise, thereby increasing the contact pressure between the moving contact finger 4 and the second power static contact 2, so that they remain closed (not repelled). Subsequently, the second elastic current-carrying member 13-2 is repelled by the action of the electric force, so that all the current flows in through the second power static contact 2 → the moving contact finger 4 → the pigtail 7 → and finally flows out from the second electric force compensator 6. Afterwards, since the current flowing through the second elastic current-carrying member 13-2 disappears, the second elastic current-carrying member 13-2 is closed again with the moving contact finger 4, and the current flows as it did at the beginning. This process is repeated, and the second elastic current-carrying member 13-2 and the pigtail 7 alternately carry large currents, thereby meeting the performance requirements of the product.

[0102] The second elastic current-carrying member 13-2 is subject to the Laplace force from the second electrodynamic compensator 6 and the Holm force from the movable contact finger 4. While opening of the second elastic current-carrying member 13-2 is permitted during short-circuit current operation, it is desirable for the member to close immediately after opening, reopen, and close again, thereby maximizing the heat dissipation from the short-circuit current. Therefore, analysis of the Laplace force is essential, as it persists throughout the current flow period. Experimental analysis has demonstrated that it is sufficiently small to not affect opening, thereby ensuring the desired performance.

[0103] Meanwhile, experimental analysis also proves that the proximity of the second electrodynamic compensation section 6-3 and the moving contact finger 4 and a shorter second electrodynamic compensation section 6-3 (hypotenuse section) can reduce the Laplace electrodynamic force that repels the second elastic current-carrying member 13-2.

[0104] The first electric force compensation section and the second electric force compensation section provide the largest electric force weight to the moving contact finger, so it can be set on a different plane from the moving contact assembly so that it can be aligned with the moving contact finger. Figure 2 The two magnets overlap to obtain a larger electric force (in this case, no magnetic conductor is needed).

[0105] When the moving contact assembly is driven by the ATSE operating mechanism, Figure 3 When the ATSE is rotated counterclockwise from the closed position shown, performing a current-breaking operation such as an AC-33A interruption, the current is only 10 times the rated current. The electric compensating force is quite small, allowing the mechanism to easily overcome this force and open the moving contact to interrupt the arc. Therefore, by setting the appropriate contact pressure, it is easy to achieve a balance between Icw and AC-33A, resulting in an ATSE with both high Icw and AC-33A performance.

[0106] According to the above-mentioned embodiments of the present disclosure, at least one magnetic conductor 8 is provided on each of the first electrodynamic compensation section 5 - 3 and the second electrodynamic compensation section 6 - 3 .

[0107] According to yet another embodiment of the present disclosure, a dual power transfer switch is provided, wherein the dual power transfer switch includes at least one disconnecting unit as described above.

[0108] In the single-pole disconnecting unit, two power supply static contacts, connection terminals and compensation circuits are installed to form the first first-state single-pole disconnecting unit. After placing the first pole of the moving contact assembly into the first first-state single-pole disconnecting unit, connect the braid at the tail of the moving contact finger to the compensation circuit, place the second pole of the moving contact assembly into the second first-state single-pole disconnecting unit, connect the braid at the tail of the moving contact finger to the compensation circuit, place the third pole of the moving contact assembly into the third first-state single-pole disconnecting unit, connect the braid at the tail of the moving contact finger to the compensation circuit, and finally place the fourth pole of the moving contact assembly into the fourth first-state single-pole disconnecting unit, connect the braid at the tail of the moving contact finger to the compensation circuit, and then install the pole separator (not shown) and the arc extinguishing chamber. At this point, the installation of the four-pole disconnecting unit is completed (as shown in FIG. Figure 6 shown).

[0109] The four-pole disconnect unit is connected to an ATS mechanism (not shown) via a coupling 11 to form a complete dual power transfer switch (TSE).

[0110] When the TSE is connected to the first power supply or the second power supply, when a short-circuit current passes through it, due to the existence of the compensation circuit, the greater the short-circuit current, the greater the electric compensation force, thereby always pressing the contact fingers of the moving contact against the corresponding static contact to obtain a higher short-circuit short-time withstand capability, i.e. Icw.

[0111] When the TSE connects a short-circuit current from the double-open position, due to the existence of the compensation circuit, the greater the short-circuit current, the greater the electric compensation force, thereby always pressing the contact fingers of the moving contact against the static contact to obtain a higher short-circuit connection capacity, i.e. Icm.

[0112] When the TSE connects and disconnects an overload (≤10In) or normal current (In), the electromotive force of the compensation circuit is negligible relative to the contact pressure, and the breaking speed of the moving contact is not affected by the electromotive force, so it quickly separates from the static contact to obtain a better electrical connection and disconnection performance.

[0113] With reference to specific embodiments, although the present disclosure has been described in the specification and drawings, it should be understood that, without departing from the scope of the present disclosure as defined in the claims, those skilled in the art may make various changes and that various equivalents may replace various elements therein. Moreover, the combination and matching of the technical features, elements and / or functions between the specific embodiments herein are clear and distinct, so that, based on these disclosed contents, those skilled in the art can appreciate that the technical features, elements and / or functions in the embodiments can be combined into another specific embodiment as appropriate, unless otherwise described in the above contents. In addition, according to the teachings of the present disclosure, many changes can be made to adapt to special circumstances or materials without departing from the scope of the essence of the present disclosure. Therefore, the present disclosure is not limited to the individual specific embodiments illustrated in the drawings, and the specific embodiments described in the specification as the best embodiments currently envisioned for implementing the present disclosure, and the present disclosure is intended to include all embodiments that fall within the scope of the above description and the appended claims.

Claims

1. A disconnect unit with an auxiliary diversion component, wherein The disconnect unit includes a first power static contact, a second power static contact, a first electric power compensator, a second electric power compensator, a moving contact assembly, and a pigtail connected between the moving contact assembly and the first electric power compensator and the second electric power compensator. The auxiliary flow diversion component includes a first flow diversion component and a second flow diversion component; The first diversion component is connected to the first electric power compensation component; The second diverter component is connected to the second electric power compensator; When the moving contact assembly contacts the first power static contact, the moving contact assembly contacts the first shunt component, and the current flowing through the first shunt component is greater than the current flowing through the pigtail; When the moving contact assembly contacts the second power static contact, the moving contact assembly contacts the second shunt component, and the current flowing through the second shunt component is greater than the current flowing through the pigtail.

2. The breaking unit according to claim 1, wherein The first current-dividing component includes a first elastic current-carrying member made of a conductive material and a first contact point provided on one end of the first elastic current-carrying member; The other end of the first elastic current-carrying member is connected to the first electrodynamic compensator; The second current-dividing component includes a second elastic current-carrying member made of a conductive material and a second contact point provided on one end of the second elastic current-carrying member; The other end of the second elastic current-carrying member is connected to the second electrodynamic compensator.

3. The breaking unit according to claim 1, wherein The first shunt component includes a first shunt contact piece, a first shunt spring and a first shunt braid; The lower end of the first shunt contact piece is pivotally connected to the disconnect unit housing. The upper end of the first shunt contact piece is provided with a first shunt contact surface that contacts the moving contact assembly and a first shunt motion range limiting surface that cooperates with the disconnect unit housing. The first shunt spring applies a force to the first shunt contact piece to cause the first shunt contact piece to abut against the moving contact assembly and provide contact pressure therebetween. The lower end of the first shunt contact piece is also connected to the first electric force compensation component via a first shunt braid. The second shunt component includes a second shunt contact piece, a second shunt spring and a second shunt braid; The lower end of the second shunt contact piece is pivotally connected to the disconnect unit housing, and the upper end of the second shunt contact piece is provided with a second shunt contact surface in contact with the moving contact assembly and a second shunt motion range limiting surface cooperating with the disconnect unit housing. The second shunt spring applies a force to the second shunt contact piece so that the second shunt contact piece is attached toward the moving contact assembly and provides contact pressure therebetween. The lower end of the second shunt contact piece is also connected to the second electric power compensation component through a second shunt braid.

4. The breaking unit according to claim 3, wherein The force applied by the first shunt contact piece passes through the pivot center of the movable contact assembly, so that the contact pressure between the first shunt contact piece and the movable contact assembly does not reduce the contact pressure between the movable contact assembly and the first power static contact, and does not hinder the opening of the movable contact assembly relative to the first power static contact; The force applied by the second shunt contact passes through the pivot center of the moving contact assembly, so that the contact pressure between the second shunt contact and the moving contact assembly does not reduce the contact pressure between the moving contact assembly and the second power static contact, and does not hinder the opening of the moving contact assembly relative to the second power static contact.

5. The breaking unit according to claim 2, wherein When the moving contact assembly contacts the first power static contact, the direction of the current on the first electric force compensator is consistent with the direction of the current on the moving contact assembly, thereby generating an electric force of mutual attraction, thereby forming a torque that drives the moving contact assembly to rotate, thereby increasing the contact pressure between the moving contact assembly and the first power static contact; When the moving contact assembly contacts the second power static contact, the direction of the current on the second electric force compensator is consistent with the direction of the current on the moving contact assembly, thereby generating an electric force of mutual attraction, thereby forming a torque that drives the moving contact assembly to rotate, thereby increasing the contact pressure between the moving contact assembly and the second power static contact; When the current increases, the electromotive force increases.

6. The breaking unit according to claim 5, wherein The movable contact assembly rotates between a first position and a second position; When in the first position, the moving contact assembly is in contact with the first power static contact; In the second position, the moving contact assembly contacts the second power static contact.

7. The breaking unit according to claim 6, wherein The first power static contact, the second power static contact, the first electric force compensator, and the second electric force compensator are arranged to surround the movable contact assembly.

8. The breaking unit according to claim 6, wherein The first electrodynamic compensator includes a first current inlet, a first current path section, a first electrodynamic compensation section, and a first load terminal section.

9. The breaking unit according to claim 8, wherein The second electrodynamic compensator includes a second current inlet, a second current path section, a second electrodynamic compensation section, and a second load terminal section.

10. The breaking unit according to claim 9, wherein The moving contact assembly includes a moving contact bracket and a moving contact finger mounted on the moving contact bracket; The movable contact finger and the movable contact bracket have the same pivot center position or different pivot center positions.

11. The breaking unit according to claim 10, wherein One end of the movable contact finger is connected to the first current inlet end and the second current inlet end through a pigtail wire; The first elastic current-carrying member is connected to the first current inlet terminal; The second elastic current-carrying member is connected to the second current inlet terminal.

12. The breaking unit according to claim 11, wherein When the moving contact assembly is in the first position, current flows through the moving contact finger, the flexible braid and the first elastic current-carrying member connected in parallel, the first current entry end, the first current path section, the first electrodynamic compensation section, and the first load terminal section, and the direction of the current flowing through the first electrodynamic compensation section is consistent with the direction of the current flowing through the moving contact finger; When the moving contact assembly is in the second position, current flows through the moving contact fingers, the soft pigtails and the second elastic current-carrying member connected in parallel, the second current entry end, the second current path section, the second electrodynamic compensation section and the second load terminal section, and the direction of the current flowing through the second electrodynamic compensation section is consistent with the direction of the current flowing through the moving contact fingers.

13. The breaking unit according to claim 10, wherein At least one magnetic conductor is respectively provided on the first electrodynamic compensation section and the second electrodynamic compensation section.

14. A dual power transfer switch, wherein: The dual power transfer switch includes at least one disconnecting unit according to any one of claims 1 to 13.

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