A circuit breaker

Abstract

A circuit breaker comprises a load (1) and a circuit breaker body (2), the circuit breaker body (2) is internally provided with a breaking part (2a), the breaking part (2a) comprises at least two breaking poles, the circuit breaker body (2) is connected with the load (1), and each end of the load (1) is connected with at least one breaking pole, characterized in that the circuit breaker body (2) is internally provided with a switching part (2b), and the circuit breaker body (2) is externally provided with a switching conductor (6), and the switching part (2b) and the switching conductor (6) can change the opposite direction current in the two breaking poles directly connected with the two ends of the load (1) into the same direction current, so as to improve the breaking capacity of the circuit breaker.

Description

Technical Field

[0001] This invention belongs to the field of low-voltage electrical appliance technology, specifically relating to a circuit breaker that improves the breaking performance of the circuit breaker by using an adapter plate to make the current direction in the breaking poles at both ends of the load the same. Background Technology

[0002] With the development of new energy technologies, higher requirements are being placed on low-voltage electrical components, especially in photovoltaic DC power systems, where the rated operating voltage of low-voltage electrical appliances can even reach DC 1500V. Using a multi-break series connection method can improve the breaking performance of circuit breakers. Furthermore, when all breaking poles of a DC molded case circuit breaker are at one end of the load, by connecting the load side of one breaking pole in series with the power supply side of another breaking pole, the current direction of all breaking poles can be made to be the same.

[0003] However, when a DC molded case circuit breaker has breaking poles at both ends of the load, the current in the two breaking poles connected to the load flows in opposite directions. This causes the arc current at the break points of these two breaking poles to flow in opposite directions, resulting in the arcs repelling each other. If the two arcs move at different speeds, the slower arc will be repelled by the faster arc, and thus may not reach the arc-extinguishing grid. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing DC molded case circuit breakers, where both ends of the load have breaking poles, resulting in the currents in the two breaking poles of the load flowing in opposite directions. This causes the arc currents at the break points of the two breaking poles to flow in opposite directions, leading to mutual repulsion of the arcs and thus reducing the breaking capacity of the circuit breaker. The invention provides a circuit breaker that, through a transition section and a transition conductor, ensures that the currents in the two breaking poles of the circuit breaker flowing in the same direction when connected to the load, thereby improving the breaking performance of the circuit breaker.

[0005] Technical solution

[0006] To achieve the above-mentioned technical objectives, the present invention provides a circuit breaker, comprising a load and a circuit breaker body. The circuit breaker body has an internal breaking section, which includes at least two breaking poles. The circuit breaker body is connected to the load, and at least one breaking pole is connected to each end of the load. The circuit breaker body is characterized by having an internal transfer section and an external transfer conductor. Through the transfer section and the transfer conductor, the opposing currents in the at least two breaking poles directly connected to the two ends of the load can be converted into unidirectional currents, thereby improving the breaking capacity of the circuit breaker.

[0007] Furthermore, it also includes a corresponding number of short-circuiting conductors, the number of which corresponds to the number of breaking poles that are not directly connected to the two ends of the load. The corresponding number of short-circuiting conductors can short-circuit the breaking pole directly connected to the load and other breaking poles located on the same side of the load as the breaking pole. Through the transition part, the transition conductor, and the short-circuiting conductors, the current in all breaking poles of a circuit breaker with three or more breaking poles can be made to be in the same direction, thereby improving the breaking capacity of the circuit breaker.

[0008] Furthermore, the disconnecting section includes at least a disconnecting electrode one and a disconnecting electrode two. Each end of the disconnecting electrode one is provided with a terminal block one and a terminal block two. Each end of the disconnecting electrode two is provided with a terminal block three and a terminal block four. The disconnecting electrode one and the disconnecting electrode two are located at both ends of the load and are directly connected to the load. Each end of the connecting section is provided with a terminal block five and a terminal block six.

[0009] Furthermore, one end of the load is connected to terminal six on the load side of the adapter, and the other end of the load is directly connected to terminal two on the load side of the disconnect pole one.

[0010] One end of the power supply is connected to terminal five on the power supply side of the adapter, and the other end of the power supply is connected to terminal five on the power supply side of one of the disconnect poles located on the same end of the load.

[0011] Furthermore, the transition conductor includes a first transition conductor and a second transition conductor;

[0012] One end of the first adapter conductor is connected to the terminal block on the load side of the adapter, and the other end is connected to the terminal block on the power supply side of the disconnect pole two on the same end of the load as the adapter.

[0013] One end of the second adapter conductor is connected to the power supply side terminal of the adapter, and the other end is connected to the load side terminal of one of the disconnect poles of the adapter at the same end as the load.

[0014] Furthermore, one end of each of the corresponding number of shorting conductors is connected to the load side terminal of one of the disconnecting poles in the disconnecting section, and the other end is connected to the power supply side terminal of another disconnecting pole located at the same end of the load in the disconnecting section.

[0015] Furthermore, the switching part is disposed on the circuit breaker body, located beside the second breaking pole that is directly connected to the load through the first switching conductor.

[0016] Furthermore, one end of the first adapter conductor is connected to terminal six on the load side of the adapter, and the other end is connected to terminal three on the power supply side of the disconnect pole two on the same end of the load as the adapter.

[0017] One end of the second adapter conductor is connected to terminal five on the power supply side of the adapter, and the other end is connected to terminal four on the load side of the disconnect pole two on the same end as the load of the adapter.

[0018] Furthermore, the six and two terminals for connecting the load in the circuit breaker body are located on one side of the circuit breaker body, and the five and one terminals for connecting the power supply in the circuit breaker body are located on the other side of the circuit breaker body.

[0019] Terminal 6, terminal 5, terminal 2, and terminal 1 are located on the outermost side of the circuit breaker body.

[0020] Furthermore, it also includes a series mounting plate, which is installed at the bottom of the circuit breaker body, and the short-circuiting conductor and the transition conductor are located in the space formed by the series mounting plate and the bottom of the circuit breaker body.

[0021] Furthermore, the shorting conductor and the transition conductor are pre-installed in the series mounting plate.

[0022] Furthermore, the short-circuiting conductor and the transition conductor are installed in conjunction with the circuit breaker body, and the series mounting plate is installed in conjunction with the circuit breaker body.

[0023] Furthermore, a portion of the short-circuiting conductor and the transition conductor are pre-installed in the series mounting plate, while the remaining portion is not pre-installed in the series mounting plate. The portion of the conductor not pre-installed in the series mounting plate is matched and installed with the circuit breaker body, and the series mounting plate is matched and installed with the circuit breaker body.

[0024] Beneficial effects

[0025] This invention provides a circuit breaker that, when both ends of the load have breaking poles, uses an adapter and an adapter conductor to ensure that the current directions in the two breaking poles directly connected to the load are the same, which is beneficial for arc extinguishing and thus improves the breaking performance of the circuit breaker. Furthermore, the two power supply terminals are located on one side of the circuit breaker, and the two load terminals are located on the other side, making it convenient for users. Attached Figure Description

[0026] Appendix Figure 1a This is a schematic diagram of the wiring connection circuit of the two disconnecting pole circuit breakers in Embodiment 1 of the present invention;

[0027] Appendix Figure 1b This is a three-dimensional schematic diagram of the modification of a three-pole circuit breaker into a two-pole circuit breaker in Embodiment 1 of the present invention;

[0028] Appendix Figure 1c This is a schematic diagram of the installation of the series mounting plate, the adapter conductor, and the insulating component in Embodiment 1 of the present invention;

[0029] Appendix Figure 2 This is a schematic diagram of the wiring connection circuit for the two disconnecting pole circuit breakers in Embodiment 2 of the present invention. Figure 2 ;

[0030] Appendix Figure 3a This is a schematic diagram of the wiring connection circuit of the three disconnecting pole circuit breakers in Embodiment 3 of the present invention;

[0031] Appendix Figure 3b This is a three-dimensional schematic diagram of the modification of a four-pole circuit breaker into a three-pole circuit breaker in Embodiment 3 of the present invention;

[0032] Appendix Figure 3c This is a schematic diagram of the installation of the series mounting plate, shorting conductor, transition conductor, and insulating component in Embodiment 3 of the present invention;

[0033] Appendix Figure 4 This is a schematic diagram of the wiring connection circuit for the three-pole circuit breakers in Embodiment 4 of the present invention. Figure 2 ;

[0034] Appendix Figure 5a This is a schematic diagram of the wiring connection circuit of the three disconnecting pole circuit breakers in Embodiment 5 of the present invention;

[0035] Appendix Figure 5b This is a three-dimensional schematic diagram of three independently configured circuit breakers in the transfer section of Embodiment 5 of the present invention;

[0036] Appendix Figure 6 This is a schematic diagram of the connection circuit of the three breaking pole circuit breakers that are not on the outermost sides of the two ends of the circuit breaker in this invention, where the power supply side and the load side are not on the outermost sides of the circuit breaker.

[0037] Appendix Figure 7a This is a schematic diagram of the wiring connection circuit of the four disconnecting pole circuit breakers that are not on the outermost sides of the circuit breaker on the power supply side and load side in this invention.

[0038] Appendix Figure 7b This is a schematic diagram of the wiring connection circuit for the four breaking pole circuit breakers on the power supply side and load side that are not on the outermost sides of the circuit breaker in this invention. Figure 2 .

[0039] Appendix Figure 7c This is diagram three showing the wiring connection of the four disconnecting pole circuit breakers, whose power supply side and load side are not on the outermost sides of the circuit breaker in this invention.

[0040] Appendix Figure 7d This is a schematic diagram of the wiring connection circuit for the four breaking pole circuit breakers on the power supply side and load side that are not on the outermost sides of the circuit breaker in this invention. Figure 4 .

[0041] Appendix Figure 8aThis is a schematic diagram of the wiring connection circuit of the four breaking pole circuit breakers on the outermost sides of the circuit breaker on both sides of the power supply side and the load side in this invention.

[0042] Appendix Figure 8b This is a schematic diagram of the wiring connection circuit for the four breaking pole circuit breakers on the outermost sides of the circuit breaker on both sides of the power supply side and the load side in this invention. Figure 2 .

[0043] Appendix Figure 9 This is a schematic diagram of the wiring connection circuit for the rotary double-break contact system in Embodiment 8 of the present invention.

[0044] Appendix Figure 10 This is a schematic diagram of the wiring connection circuit of the bridge-type double-break contact system in Embodiment 9 of the present invention. Detailed Implementation

[0045] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0046] In the description of this invention, it should be noted that the terms "inner," "outer," "front," "rear," "left," "right," "usual side," and "spare side," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0047] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0048] The present invention will now be described in further detail with reference to specific embodiments and accompanying drawings.

[0049] Example 1

[0050] When existing DC molded case circuit breakers have breaking poles at both ends of the load, the current directions in the two breaking poles connected to the load are opposite, causing the arc currents at the break points of these two breaking poles to be in opposite directions, resulting in mutual repulsion of the arcs and thus reducing the breaking capacity of the circuit breaker. To solve this problem, this invention provides a circuit breaker. For more precise explanation, this embodiment defines a pole with a contact system as a breaking pole. The molded case circuit breaker includes a load 1 and a circuit breaker body 2. The circuit breaker body 2 has a breaking section 2a inside, which includes at least two breaking poles. The circuit breaker body 2 is connected to the load 1, and each end of the load 1 is connected to at least one breaking pole. This embodiment uses a two-pole circuit breaker as an example for illustration. (See attached diagram) Figure 1a and attached Figure 1b As shown, each end of the load 1 is directly connected to a breaking pole a. The circuit breaker body 2 has an internal transfer part 2b and an external transfer conductor 6. Through the transfer part 2b and the transfer conductor 6, the opposite currents in the two breaking poles a directly connected to the ends of the load 1 can be converted into the same current, thereby improving the breaking capacity of the DC circuit breaker.

[0051] The aforementioned direct connection includes the disconnecting electrode connected to the load via a conductor, the disconnecting electrode being directly wired to the load, and the disconnecting electrode being connected to the load via a transition conductor.

[0052] The circuit breaker body 2 includes a breaking section 2a and a transition section 2b. The breaking section 2a includes at least a first breaking pole 2a01 and a second breaking pole 2a02. The first breaking pole 2a01 and the second breaking pole 2a02 are located at both ends of the load and are directly connected to the load 1. That is, the second breaking pole 2a02 is directly connected to the load 1 through the transition conductor 6, and the first breaking pole 2a01 is directly connected to the load 1. In this embodiment, the disconnecting part 2a includes a first disconnecting pole 2a01 and a second disconnecting pole 2a02, and each end of the load 1 is directly connected to a disconnecting pole a, which refers to the first disconnecting pole 2a01 and the second disconnecting pole 2a02. The two ends of the first disconnecting pole 2a01 are respectively provided with a first terminal 2a0101 and a second terminal 2a0102. The two ends of the second disconnecting pole 2a02 are respectively provided with a third terminal 2a0201 and a fourth terminal 2a0202. The two ends of the transition part 2b are respectively provided with a fifth terminal 2b01 and a sixth terminal 2b02. At the same time, the transition part 2b is disposed on the circuit breaker body 2, located beside the second disconnecting pole 2a02 which is directly connected to the load through the first transition conductor 601.

[0053] One end of the load 1 is connected to terminal 2b02 on the load side of the adapter 2b, and the other end of the load 1 is directly connected to terminal 2a0102 on the load side of a disconnecting pole 2a01 connected to this end. One end of the power supply 3 is connected to terminal 2b01 on the power supply side of the adapter 2b, and the other end of the power supply 3 is connected to terminal 2a01 on the power supply side of one of the disconnecting poles on the same end as the load 1. In this embodiment, the other end of the power supply 3 is connected to terminal 2a0101 on the power supply side of the disconnecting pole 2a01 on this end. Terminal 2b02 and terminal 2a0102 connecting the load 1 in the circuit breaker body 2 are located on one side of the circuit breaker body 2, i.e., attached. Figure 1b On the lower side, i.e., the load side, the terminals 2b01 and 2a0101 connecting the power supply 3 in the circuit breaker body 2 are located on the other side of the circuit breaker body 2, which is the auxiliary side. Figure 1b On the upper side, that is, the power supply side. Terminals six (2b02), five (2b01), two (2a0102), and one (2a0101) are located on the outermost side of the circuit breaker body 2. For the attached... Figure 1b Specifically, terminal 6 2b02 and terminal 5 2b01 are located on the rightmost side of the circuit breaker body 2, while terminal 2a0102 and terminal 1 2a0101 are located on the leftmost side of the circuit breaker body 2.

[0054] The adapter conductor 6 includes a first adapter conductor 601 and a second adapter conductor 602; one end of the first adapter conductor 601 is connected to the terminal block on the load side of the adapter part 2b, and the other end is connected to the terminal block 2a0201 on the power supply side of the disconnect pole 2a02 on the same end of the load 1 as the adapter part 2b.

[0055] One end of the second adapter conductor 602 is connected to the power supply side terminal of the adapter 2b, and the other end is connected to the load side terminal of one of the disconnecting poles of the adapter 2b on the same end as the load 1. In this embodiment, one end of the first adapter conductor 601 is connected to the load side terminal 2b02 of the adapter 2b, and the other end is connected to the power supply side terminal 2a0201 of the adapter 2b on the same end as the disconnecting pole 2a02 on the same end as the load 1. One end of the second adapter conductor 602 is connected to the power supply side terminal 2b01 of the adapter 2b, and the other end is connected to the load side terminal 2a0202 of the adapter 2b on the same end as the disconnecting pole 2a02 on the same end as the load 1.

[0056] The specific assembly process of this embodiment is as follows: (see attached) Figure 1bAs shown, the 2-pole circuit breaker of this embodiment uses one pole of a 3-pole circuit breaker as a transition section, removing the moving contact of that pole and retaining two mutually insulated terminals. The two poles with contact systems form the breaking section 2a. The breaking section 2a and the transition section 2b constitute the circuit breaker body. The transition section 2b is located beside the breaking pole 2a02. It also includes a transition conductor 6 and a series mounting plate 7. The series mounting plate 7 is mounted on the bottom of the circuit breaker body 2, and the transition conductor 6 is located within the space formed by the series mounting plate 7 and the bottom of the circuit breaker body 2. In this embodiment, the first transition conductor 601 and the second transition conductor 602 are pre-installed in the series mounting plate. (See attached diagram) Figure 1c As shown, the first adapter conductor 601 is embedded in the series mounting plate 7, the insulating component 5 is embedded in the series mounting plate 7, and the second adapter conductor 602 is embedded in the insulating component 5, making the series mounting plate 7, the first adapter conductor 601, the insulating component 5, and the second adapter conductor 602 a single unit. The insulating component 5 provides insulation between the first adapter conductor 601 and the second adapter conductor 602. Threaded holes are provided at the mating points of the first adapter conductor 601 and the second adapter conductor 602 with their corresponding terminals.

[0057] As attached Figure 1a Appendix Figure 1b and attached Figure 1c As shown, during wiring, the series mounting plate 7 is placed at the bottom of the circuit breaker body 2. Bolts are passed through the through holes on the two terminals of the second disconnecting pole 2a02 and screwed into the corresponding threaded holes on the first transition conductor 601 and the second transition conductor 602, making the corresponding terminals on the second disconnecting pole 2a02 electrically connected to the first transition conductor 601 and the second transition conductor 602, thus forming a single unit before connecting to the power supply and load. When the power supply and load are connected, the current flowing through the first disconnecting pole 2a01 and the second disconnecting pole 2a02 flows in the same direction.

[0058] It should be noted that in this embodiment, since there is only one breaking electrode at each end of the load 1 (i.e., breaking electrode one 2a01 and breaking electrode two 2a02), it is not necessary to short-circuit conductor 4 to connect more than one breaking electrode located at one end of the load. In this embodiment, during assembly, hooks can be provided on the series mounting plate 7 and slots can be provided on the bottom of the circuit breaker body 2, making them a single unit before wiring. Alternatively, the series mounting plate 7 and the circuit breaker body 2 can be bonded together before wiring. Alternatively, countersunk holes can be provided on the series mounting plate 7 and blind holes can be provided on the bottom of the circuit breaker body 2, connecting them into a single unit using self-tapping screws.

[0059] Example 2

[0060] As attached Figure 2As shown, in the circuit breaker modified by using one pole of a three-pole circuit breaker as a transfer part, there is another connection method: the second breaking pole 2a02 is located outside the first breaking pole 2a01, that is, the first breaking pole 2a01 is located in the middle between the second breaking pole 2a02 and the transfer part. The difference between this embodiment and embodiment 1 is that the length of the transfer conductor 6 is extended to make the first breaking pole 2a01 adjacent to the transfer part 2b. Other wiring methods are the same as in embodiment 1, and its working principle is also the same as in embodiment 1. It can also achieve the purpose of making the current direction of the two breaking poles of the DC molded case circuit breaker directly connected to the load in the same direction through the transfer part 2b and the transfer conductor 6.

[0061] Example 3

[0062] In 3-pole and above circuit breakers, a corresponding number of short-circuiting conductors 4 are also required. The number of short-circuiting conductors 4 corresponds to the number of breaking poles that are not directly connected to the two ends of the load 1. One end of each of the corresponding number of short-circuiting conductors 4 is connected to the load-side terminal of one breaking pole in the breaking section 2a, and the other end is connected to the power-side terminal of another breaking pole in the breaking section 2a located on the same end of the load. This achieves the purpose of short-circuiting the breaking pole directly connected to the load 1 and other breaking poles located on the same side of the load 1 with the corresponding number of short-circuiting conductors 4. Finally, the transition section 2b, the transition conductor 6, and the short-circuiting conductors 4 ensure that the current in all breaking poles in the 3-pole and above circuit breaker is in the same direction, thereby improving the breaking capacity of the DC circuit breaker. (See attached diagram) Figure 3b As shown, this embodiment uses a 3-pole circuit breaker as an example. In this embodiment, the 3-pole circuit breaker uses one pole of a 4-pole circuit breaker as a transition section, removing the moving contact of that pole and retaining two mutually insulated terminals. Three breaking poles with contact systems—breaking pole one 2a01, breaking pole two 2a02, and breaking pole three 2a03—form the breaking section 2a. Meanwhile, as shown in the attached... Figure 3a As shown, one end of load 1 includes two disconnect poles (i.e., disconnect pole 3 2a03 and disconnect pole 1 2a01). In this embodiment, the number of shorting conductors is 1. Specifically, one end of the shorting conductor 4 is connected to the corresponding terminal 8 2a0302 on the load side of disconnect pole 3 2a03, one of the two disconnect poles at one end of load 1, and the other end is connected to the terminal 1 2a0101 on the power supply side of disconnect pole 1 2a01, the other of the two disconnect poles located at the same end of load 1. The corresponding terminal 7 2a0301 on the power supply side of disconnect pole 3 2a03 is connected to the power supply.

[0063] The wiring principle of the adapter conductor is the same as in Example 1. The specific installation process of this example is as follows: (see attached diagram) Figure 3cAs shown, the first adapter conductor 601, the second adapter conductor 602, and the shorting conductor 4 are pre-installed in the series mounting plate 7. The second adapter conductor 602 and the shorting conductor 4 are embedded in the series mounting plate 7. The insulating component 5 is embedded in the series mounting plate 7, and the first adapter conductor 601 is embedded in the insulating component 5, making the series mounting plate 7, the shorting conductor 4, the second adapter conductor 602, the insulating component 5, and the first adapter conductor 601 a single unit. The insulating component 5 insulates the first adapter conductor 601 and the second adapter conductor 602 from each other. Threaded holes are provided at the mating points of the first adapter conductor 601, the second adapter conductor 602, and the shorting conductor 4 with their corresponding terminals.

[0064] As attached Figure 3a , 3b As shown in 3c, during wiring, place the series mounting plate 7 at the bottom of the circuit breaker body 2. Bolts are passed through the through holes on the corresponding terminals and screwed into the threaded holes on the first transition conductor 601, the second transition conductor 602, and the shorting conductor 4. This electrically connects the corresponding terminals on the second breaking pole 2a02 to the first transition conductor 601 and the second transition conductor 602, and connects the shorting conductor 4 to terminals 2a0302 and 2a0101. This makes the series mounting plate 7 and the circuit breaker body 2 a single unit before connecting to the power supply and load. After connecting to the power supply and load, the current flowing through the three breaking poles is in the same direction.

[0065] Example 4

[0066] As attached Figure 4 As shown, another way to connect the circuit by modifying a four-pole circuit breaker into a three-pole circuit breaker is to ensure that the current flowing through the three breaking poles is in the same direction, even though the second breaking pole 2a02 is not adjacent to the transition part 2b.

[0067] Example 5

[0068] As attached Figure 5b As shown, in this embodiment, the switching part of the three-pole circuit breaker is an independently set pole. The switching part 2b and the breaking part 2a are spliced ​​together to form the circuit breaker body 2. The two terminals of the switching part 2b are mutually insulated. In this embodiment, the switching conductor 6 and the shorting conductor 4 are pre-installed in the series mounting plate 7.

[0069] As attached Figure 5a , 5b As shown, during wiring, first connect the transition part 2b and the disconnecting part 2a to form the circuit breaker body 2, then place the series mounting plate 7 at the bottom of the circuit breaker body 2, and connect the transition conductor 6 and the short-circuiting conductor 4 according to... Figure 5a The wiring diagram for the connection circuit shown is as follows.

[0070] Example 6

[0071] In this embodiment, as shown in the appendix Figure 3cAs shown, the short-circuiting conductor 4 and the transition conductor 6 are not pre-installed in the series mounting plate 7. During installation, first match the short-circuiting conductor 4 and the transition conductor 6 with the circuit breaker body 2, and then match the series mounting plate 7 with the circuit breaker body 2. During wiring, first connect the short-circuiting conductor 4 and the first transition conductor 601 to the corresponding terminals, then install the insulation plate 5, then connect the second transition conductor 602 to the corresponding terminals, and finally assemble the series mounting plate 7.

[0072] Example 7

[0073] In this embodiment, a portion of the short-circuiting conductor 4 and the transition conductor 6 are not pre-installed in the series mounting plate 7, while the remaining portions are pre-installed in the series mounting plate 7. During installation, the conductor not pre-installed in the series mounting plate 7 is first matched and installed with the circuit breaker body 2, and then the series mounting plate 7 is matched and installed with the circuit breaker body 2.

[0074] Specifically, during wiring, the second transition conductor 602 and the shorting conductor 4 are pre-embedded in the series mounting plate 7, and the insulating component 5 is embedded in the series mounting plate 7. First, the first transition conductor 601 is connected to the corresponding terminal block, and then the series mounting plate 7 is assembled. Alternatively, in this embodiment, only the second transition conductor 602 is pre-embedded in the series mounting plate 7, and the insulating component 5 is embedded in the series mounting plate 7. The first transition conductor 601 and the shorting conductor 4 are not pre-embedded in the series mounting plate 7. During installation, after the first transition conductor 601 and the shorting conductor 4 are matched and installed with the circuit breaker body 2, the series mounting plate 7 is then matched and installed with the circuit breaker body 2, as shown in the attached figure. Figure 3c As shown.

[0075] Example 8

[0076] As attached Figure 9 As shown in the diagram, by connecting the circuit breaker as illustrated, the breaking poles include both the break point on the power supply side and the break point on the load side. The arc current direction is the same at all breaks. This ensures that the arcs at all breaks on the power supply side enter the arc-extinguishing chamber on the power supply side synchronously, and the arcs at all breaks on the load side enter the arc-extinguishing chamber on the load side synchronously.

[0077] Example 9

[0078] As attached Figure 10 As shown, in a bridge-type double-break circuit breaker, the breaking poles include a break point located on the power supply side and a break point located on the load side. Although the arc current direction of all breaks on the power supply side is opposite to that of all breaks on the load side, the arc current direction of all breaks on the power supply side is the same, and the arc current direction of all breaks on the load side is also the same. This ensures that the arcs of all breaks on the power supply side enter the arc-extinguishing chamber on the power supply side synchronously, and the arcs of all breaks on the load side enter the arc-extinguishing chamber on the load side synchronously.

[0079] Additionally, as attached Figure 6 As shown in figures 7a, 7b, 7c, 7d, 8a, and 8b, this invention also provides some other connection circuit wiring diagrams based on the technical principles in Embodiments 1 or 3, which utilize short-circuit conductors and transition conductors to change the current direction at both ends of the load, thereby improving the breaking capacity of the DC circuit breaker. Through the wiring shown, the arc current direction at all break points on the power supply side of all break points will be the same, or the arc current direction at all break points on the load side of all break points will be the same, or the arc current direction at all break points in the middle of all break points will be the same.

[0080] It should also be noted that there are multiple ways to install the series mounting plate 7, short-circuiting conductor 4, transition conductor 6, insulating component 5, and circuit breaker body 2. Any installation method inspired by the embodiments of this invention should be considered to fall within the protection scope of this invention. Furthermore, the circuit breaker body includes a breaking section and a transition section. Therefore, regardless of whether the breaking section and the transition section are connected as a whole, and regardless of their structural implementation, both the breaking section and the transition section are located inside the circuit breaker body. Embodiments 1 and 3 use one pole of a multi-pole circuit breaker as the transition section, so the width of the transition section is the same as the width of the breaking pole. However, the width of the transition section can be different from the width of the breaking pole; the transition section can be narrower than the breaking pole. The pole of the multi-pole circuit breaker modified into the transition section in Embodiments 1 and 3 can be designed to be narrower than the breaking pole. The transition section in Embodiment 5 can also be designed to be narrower than the breaking pole, thus reducing the width of the circuit breaker body.

[0081] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A circuit breaker comprising a load (1) and a circuit breaker body (2), the circuit breaker body (2) being provided with a breaking part (2a) inside, the breaking part (2a) comprising at least two breaking poles, the circuit breaker body (2) being connected with the load (1), at least one breaking pole being connected to each end of the load (1), characterized in that: The inside of the circuit breaker body (2) is provided with a switching part (2b), and the outside of the circuit breaker body (2) is provided with a switching conductor (6), through which the opposite direction current in at least two breaking poles directly connected with both ends of the load (1) can be changed into the same direction current, thereby improving the breaking capacity of the circuit breaker. ​ The breaking part (2a) comprises at least a first breaking pole (2a01) and a second breaking pole (2a02), the two ends of the first breaking pole (2a01) are respectively provided with a first connecting terminal (2a0101) and a second connecting terminal (2a0102), the two ends of the second breaking pole (2a02) are respectively provided with a third connecting terminal (2a0201) and a fourth connecting terminal (2a0202), the first breaking pole (2a01) and the second breaking pole (2a02) are located at both ends of the load and directly connected with the load (1), and the two ends of the switching part (2b) are respectively provided with a fifth connecting terminal (2b01) and a sixth connecting terminal (2b02). The switching conductor (6) comprises a first switching conductor (601) and a second switching conductor (602), one end of the first switching conductor (601) is connected with the connecting terminal on the load side of the switching part (2b), and the other end is connected with the third connecting terminal (2a0201) on the power supply side of the second breaking pole (2a02) on the same side of the load (1) as the switching part (2b), one end of the second switching conductor (602) is connected with the connecting terminal on the power supply side of the switching part (2b), and the other end is connected with the connecting terminal on the load side of one of the breaking poles on the same side of the load (1) as the switching part (2b).

2. A circuit breaker according to claim 1, wherein: A corresponding number of short-circuit conductors (4) are further included, the number of the short-circuit conductors (4) corresponds to the number of the breaking poles not directly connected with both ends of the load (1), and the corresponding number of short-circuit conductors (4) can short-circuit the breaking pole directly connected with the load (1) and the other breaking pole on the same side of the load (1) as the breaking pole, through the switching part (2b), the switching conductor (6) and the short-circuit conductor (4), the currents in three or more breaking poles and all the breaking poles can be made to flow in the same direction, thereby improving the breaking capacity of the circuit breaker.

3. A circuit breaker as claimed in claim 1, wherein: One end of the load (1) is connected with the sixth connecting terminal (2b02) on the load side of the switching part (2b), the other end of the load (1) is directly connected with the second connecting terminal (2a0102) on the load side of the first breaking pole (2a01), one end of the power supply (3) is connected with the fifth connecting terminal (2b01) on the power supply side of the switching part (2b), and the other end of the power supply (3) is connected with the connecting terminal on the power supply side of one of the breaking poles on the same side of the load (1) as the first breaking pole (2a01).

4. A circuit breaker as claimed in claim 2, wherein: One end of each of the corresponding number of short-circuit conductors (4) is connected with the connecting terminal on the load side of one of the breaking poles in the breaking part (2a), and the other end is connected with the connecting terminal on the power supply side of the other breaking pole on the same side of the load as the breaking pole in the breaking part (2a).

5. A circuit breaker as claimed in claim 1 or 2, characterised in that: The adapter (2b) is arranged on the circuit breaker body (2) and is located at the side of the breaking pole two (2a02) directly connected to the load through the first adapter conductor (601).

6. The circuit breaker of claim 1, wherein: One end of the first adapter conductor (601) is connected to the terminal six (2b02) on the load side of the adapter (2b), and the other end is connected to the terminal three (2a0201) on the power supply side of the breaking pole two (2a02) on the same end of the load (1) as the adapter (2b). One end of the second adapter conductor (602) is connected to the terminal five (2b01) on the power supply side of the adapter (2b), and the other end is connected to the terminal four (2a0202) on the load side of the breaking pole two (2a02) on the same end of the load (1) as the adapter (2b).

7. The circuit breaker of claim 1, wherein: The terminal six (2b02) and the terminal two (2a0102) connected to the load (1) in the circuit breaker body (2) are located on one side of the circuit breaker body (2), and the terminal five (2b01) and the terminal one (2a0101) connected to the power supply (3) in the circuit breaker body (2) are located on the other side of the circuit breaker body (2); the terminal six (2b02), the terminal five (2b01), the terminal two (2a0102) and the terminal one (2a0101) are located on the outermost side of the circuit breaker body (2).

8. The circuit breaker of claim 2, wherein: A series installation plate (7) is further included, which is installed on the bottom of the circuit breaker body (2), and the short circuit conductor (4) and the adapter conductor (6) are located in the space formed by the series installation plate (7) and the bottom of the circuit breaker body (2).

9. A circuit breaker as claimed in claim 8, wherein: The short circuit conductor (4) and the adapter conductor (6) are pre-installed in the series installation plate (7).

10. The circuit breaker of claim 8, wherein: The short circuit conductor (4) and the adapter conductor (6) are matchedly installed with the circuit breaker body (2), and the series installation plate (7) is matchedly installed with the circuit breaker body (2).

11. The circuit breaker of claim 8 wherein: Part of the short circuit conductor (4) and the adapter conductor (6) is pre-installed in the series installation plate (7), and the remaining part is not pre-installed in the series installation plate (7), the conductor part not pre-installed in the series installation plate (7) is matchedly installed with the circuit breaker body (2), and the series installation plate (7) is matchedly installed with the circuit breaker body (2).

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