CN220474554U - Parallel circuit breaker structure and converter - Google Patents

Abstract

The utility model discloses a parallel circuit breaker structure and a converter, wherein the parallel circuit breaker structure comprises a circuit breaker group, a leading-out busbar, a parallel busbar and a connecting busbar, and the circuit breaker group comprises a first circuit breaker and a second circuit breaker; the lead-out busbar comprises a first lead-out busbar and a second lead-out busbar, the first lead-out busbar is connected with the pins of the first circuit breaker, and the second lead-out busbar is connected with the pins of the second circuit breaker; the first leading-out busbar and the second leading-out busbar are connected with the parallel busbar so as to connect the first circuit breaker and the second circuit breaker in parallel; the connecting busbar is connected with the parallel busbar. The technical scheme of the utility model can improve the reliability of cutting off fault current and simultaneously improve the heat dissipation effect of the parallel circuit breaker structure.

Description

Parallel circuit breaker structure and converter

Technical Field

The utility model relates to the technical field of converters, in particular to a parallel circuit breaker structure and a converter.

Background

The circuit breaker is a switching device and can be used as a safety protection device for converters such as photovoltaic inverters and wind power converters. As the power level of the converter increases, the load current of the devices in the converter also increases, and the capacity requirement of the circuit breaker increases.

The single high-capacity circuit breaker at present has the advantages of higher cost, larger volume, heavier weight, difficult maintenance, increased power density, enlarged size of the circuit breaker busbar, enlarged heat dissipation dead zone area, further raised temperature of the busbar, poor heat dissipation effect, affected current transmission, possibility of failure, shutdown of the whole machine once failure occurs, and safety risk.

Disclosure of Invention

The utility model mainly aims to provide a parallel circuit breaker structure, which can reduce the required cost, volume and weight while improving the capacity of the circuit breaker by adopting a plurality of small-capacity circuit breakers in parallel connection and can improve the heat dissipation effect of the parallel circuit breaker structure.

In order to achieve the above object, the present utility model provides a parallel circuit breaker structure, comprising:

the circuit breaker group comprises a first circuit breaker and a second circuit breaker;

the lead-out busbar comprises a first lead-out busbar and a second lead-out busbar, the first lead-out busbar is connected with the pins of the first circuit breaker, and the second lead-out busbar is connected with the pins of the second circuit breaker;

the first leading-out busbar and the second leading-out busbar are connected with the parallel busbar so as to connect the first circuit breaker and the second circuit breaker in parallel; and

and the connecting busbar is connected with the parallel busbar.

Optionally, the first circuit breaker and the second circuit breaker are transversely arranged side by side, the parallel busbar is transversely arranged, the first leading-out busbar is connected with one end of the parallel busbar, the second leading-out busbar is connected with the other end of the parallel busbar, and the parallel busbar is connected with the connecting busbar.

Optionally, the connection busbar is connected to an intermediate position of the parallel busbar.

Optionally, the first lead-out busbar comprises a first a-phase lead-out busbar, a first B-phase lead-out busbar and a first C-phase lead-out busbar, the second lead-out busbar comprises a second a-phase lead-out busbar, a second B-phase lead-out busbar and a second C-phase lead-out busbar, and the parallel busbar comprises an a-phase parallel busbar, a B-phase parallel busbar and a C-phase parallel busbar;

the phase A parallel busbar is connected with the first phase A outgoing busbar and the second phase A outgoing busbar, the phase B parallel busbar is connected with the first phase B outgoing busbar and the second phase B outgoing busbar, and the phase C parallel busbar is connected with the first phase C outgoing busbar and the second phase C outgoing busbar;

the A-phase parallel busbar, the B-phase parallel busbar and the C-phase parallel busbar are arranged in a staggered mode in space.

Optionally, the first lead-out busbar and the second lead-out busbar are correspondingly arranged, and the first a-phase lead-out busbar, the first B-phase lead-out busbar and the first C-phase lead-out busbar are spatially staggered.

Optionally, the leading-out busbar includes with first circuit breaker or the pin of second circuit breaker is connected first section, with the second section that connects of parallelly connected busbar, and connect first section with the third section of second section, first section with the second section parallels, just first section with the second section staggers in the horizontal direction and sets up, the horizontal direction perpendicular to first circuit breaker with the side by side direction of second circuit breaker.

Optionally, the three phases of the a-phase parallel busbar, the B-phase parallel busbar and the C-phase parallel busbar are staggered in a horizontal direction, and the horizontal direction is perpendicular to the side-by-side direction of the first circuit breaker and the second circuit breaker.

Optionally, the three phases of the a-phase parallel busbar, the B-phase parallel busbar and the C-phase parallel busbar are staggered in a vertical direction, the vertical direction is perpendicular to a horizontal direction, and the horizontal direction is perpendicular to a side-by-side direction of the first circuit breaker and the second circuit breaker.

Optionally, the connection busbar includes an a-phase connection busbar, a B-phase connection busbar, and a C-phase connection busbar, where the a-phase connection busbar is connected to a middle position of the a-phase parallel busbar, the B-phase connection busbar is connected to a middle position of the B-phase parallel busbar, and the C-phase connection busbar is connected to a middle position of the C-phase parallel busbar.

Optionally, the free ends of the connection busbar A, the connection busbar B and the connection busbar C are all located on the same plane.

Optionally, the a-phase connection busbar comprises a-phase switching busbar and a-phase opposite external connection busbar, the B-phase connection busbar comprises a B-phase switching busbar and a B-phase opposite external connection busbar, and the C-phase connection busbar comprises a C-phase switching busbar and a C-phase opposite external connection busbar;

one end of the phase A switching busbar is connected with the phase A parallel busbar, the other end of the phase A switching busbar is connected with the phase A opposite external connection busbar, one end of the phase B switching busbar is connected with the phase B parallel busbar, the other end of the phase B switching busbar is connected with the phase B opposite external connection busbar, and one end of the C-phase switching busbar is connected with the C-phase parallel busbar, the other end of the C-phase switching busbar is connected with the C-phase opposite external connection busbar, and the free ends of the A-phase opposite external connection busbar, the B-phase opposite external connection busbar and the C-phase opposite external connection busbar are all positioned on the same plane.

Optionally, the first circuit breaker and the second circuit breaker are longitudinally arranged in a staggered manner and are connected through the leading-out busbar, the parallel busbar and the connecting busbar.

Optionally, the leading-out busbar and the parallel busbar are the same busbar;

or the leading-out busbar and the parallel busbar are different busbars, and the connecting busbar is respectively connected with the leading-out busbar and the parallel busbar.

The utility model also proposes a converter comprising a parallel circuit breaker structure as described above.

Optionally, the converter is configured as a photovoltaic inverter, or a wind power converter.

According to the technical scheme, the circuit breaker group comprises the first circuit breaker and the second circuit breaker, the first circuit breaker and the second circuit breaker with small capacity are connected in parallel, the capacity of the circuit breaker is improved, the fault protection requirement of power distribution capacity increase is met, the reliability of cutting off fault current is further improved, meanwhile, the area of a heat dissipation blind area is conveniently reduced, the heat dissipation effect of a busbar is improved, and the use safety of devices is further improved.

In addition, the parallel structure of the pins of the first circuit breaker and the pins of the second circuit breaker is realized by the connection of the leading-out busbar, the parallel busbar and the connecting busbar, so that the number of the busbars in the parallel circuit breaker structure is as small as possible, the cost is effectively reduced, meanwhile, the wiring structure is simplified, the connection reliability is improved, and the occurrence of connection errors and the like is reduced.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

Fig. 1 is an assembly schematic diagram of an embodiment of a parallel circuit breaker structure of the present utility model, wherein a circuit breaker group includes a first circuit breaker and a second circuit breaker which are transversely connected in parallel;

FIG. 2 is an exploded view of the busbar of FIG. 1;

fig. 3 is a front view of the parallel circuit breaker structure of fig. 1;

fig. 4 is an assembled schematic view of another embodiment of the parallel circuit breaker structure of the present utility model, wherein the circuit breaker group includes a first circuit breaker and a second circuit breaker which are laterally connected in parallel;

fig. 5 is a front view of the parallel circuit breaker structure of fig. 4;

fig. 6 is an assembled schematic view of a further embodiment of the parallel circuit breaker configuration of the present utility model, wherein the circuit breaker group comprises a first circuit breaker and a second circuit breaker connected in parallel in a lateral direction;

FIG. 7 is an exploded view of the busbar of FIG. 6;

fig. 8 is a front view of the parallel circuit breaker structure of fig. 6;

fig. 9 is an assembly schematic diagram of an embodiment of a parallel circuit breaker structure of the present utility model, wherein the circuit breaker group includes a first circuit breaker, a second circuit breaker and a third circuit breaker which are transversely connected in parallel;

fig. 10 is a front view of the parallel circuit breaker structure of fig. 9;

fig. 11 is an assembly schematic diagram of an embodiment of a parallel circuit breaker structure of the present utility model, wherein the circuit breaker group includes a first circuit breaker and a second circuit breaker longitudinally connected in parallel;

fig. 12 is a side view of the parallel circuit breaker configuration of fig. 11;

FIG. 13 is an exploded view of the busbar of FIG. 12;

fig. 14 is a front view of the parallel circuit breaker structure of fig. 12.

Reference numerals illustrate:

the achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the present utility model, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

It should be noted that, if directional indications (such as up, down, left, right, front, and rear … …) are included in the embodiments of the present utility model, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present utility model, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" as it appears throughout is meant to include three side-by-side schemes, for example, "a and/or B", including a scheme, or B scheme, or a scheme that is satisfied by both a and B. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

The utility model provides a parallel circuit breaker structure.

Referring to fig. 1 to 14, in an embodiment of the present utility model, the parallel circuit breaker structure includes a circuit breaker group including a first circuit breaker 10 and a second circuit breaker 20, a lead-out busbar 30, a parallel busbar 40, and a connection busbar 50; the lead-out busbar 30 comprises a first lead-out busbar and a second lead-out busbar, wherein the first lead-out busbar is connected with a pin of the first circuit breaker 10, and the second lead-out busbar is connected with a pin of the second circuit breaker 20; the first lead-out busbar and the second lead-out busbar are both connected with the parallel busbar 40; the connecting busbar 50 is connected with the parallel busbar 40; therefore, the cutting-off capability of the circuit breaker can be improved, fault current can be effectively cut off, and the use safety of the whole machine is improved.

The circuit breaker group comprises a first circuit breaker 10 and a second circuit breaker 20, wherein the first circuit breaker 10 and the second circuit breaker 20 can be arranged at intervals transversely or longitudinally, so that the occupied space of the parallel circuit breaker structure in height or width can be conveniently and flexibly adjusted; through the parallelly connected of first circuit breaker 10 and second circuit breaker 20 of small capacity, improve the circuit breaker capacity, satisfy the fault protection demand of distribution capacity increase, improve the reliability of cutting off fault current, simultaneously, be convenient for reduce the heat dissipation blind area, promote the radiating effect of female row, and then promote the safety in utilization of device. In addition, compared with a single circuit breaker with the same capacity, the parallel connection arrangement of the first circuit breaker 10 and the second circuit breaker 20 with small capacity has the advantages of smaller overall size, lighter weight and lower cost, and when faults occur, the operation and the maintenance are more convenient by replacing any one of the first circuit breaker 10 and the second circuit breaker 20 and other fault parts.

The first circuit breaker 10 and the second circuit breaker 20 are sequentially connected through an outgoing busbar 30, a parallel busbar 40 and a connecting busbar 50, so that the parallel connection of the pins of the first circuit breaker 10 and the pins of the second circuit breaker 20 is realized, the pins can be input pins or input pins, specifically, the first outgoing busbar comprises a first input outgoing busbar and a first output outgoing busbar, the first input outgoing busbar is used for connecting the input pins of the first circuit breaker 10, and the first output outgoing busbar is used for connecting the output pins of the first circuit breaker 10; the second lead-out busbar comprises a second input lead-out busbar and a second output lead-out busbar, the second input lead-out busbar is used for being connected with an input pin of the second circuit breaker 20, and the second output lead-out busbar is used for being connected with an output pin of the second circuit breaker 20; the parallel busbar 40 includes a first parallel busbar and a second parallel busbar, the first input lead-out busbar and the second input lead-out busbar are connected by the first parallel busbar, and the first output lead-out busbar and the second output lead-out busbar are connected by the second parallel busbar; the connection busbar 50 includes a first connection busbar and a second connection busbar, the first connection busbar is connected with the first parallel busbar and serves as an input end of the parallel circuit breaker structure, the second connection busbar is connected with the second parallel busbar and serves as an output end of the parallel circuit breaker structure, and the parallel circuit breaker structure is connected into a circuit through the first connection busbar and the second connection busbar.

Because the first input of the corresponding first circuit breaker 10 draws out the busbar and the second input of the corresponding second circuit breaker 20 draws out the busbar, the two are connected with first parallel busbar, first connection busbar sequentially, with the first output of corresponding first circuit breaker 10 draws out the busbar and the second output of corresponding second circuit breaker 20 draws out the busbar, the two are the same with the structure that second parallel busbar, second connection busbar connect sequentially, so can make busbar spare part in the parallel circuit breaker structure as few as possible, effectively reduce cost, can also simplify the wiring structure, promote the reliability of connection, reduce the emergence of circumstances such as connection error, simultaneously promote the reliability of cutting off fault current, ensure safety, and, can also reduce the heat dissipation blind area, promote the radiating effect of busbar.

In addition, the circuit breaker group includes, but is not limited to, the first circuit breaker 10 and the second circuit breaker 20, that is, the circuit breaker group may further include a plurality of circuit breakers such as a third circuit breaker (for example, as shown in fig. 9 to 10), a fourth circuit breaker, and the like, and the corresponding outgoing busbar 30 may also be provided to be connected with the parallel busbar 40, so as to further increase the capacity of the circuit breaker group, and at the same time, simplify the wiring structure.

According to the technical scheme, the circuit breaker group comprises the first circuit breaker 10 and the second circuit breaker 20, the capacity of the circuit breaker is improved through connecting the first circuit breaker 10 and the second circuit breaker 20 with small capacities in parallel, the fault protection requirement of power distribution capacity increase is met, the reliability of cutting off fault current is further improved, meanwhile, the area of a heat dissipation blind area is conveniently reduced, the heat dissipation effect of a busbar is improved, and the use safety of devices is further improved.

In addition, the parallel connection structure of the pins of the first circuit breaker 10 and the pins of the second circuit breaker 20 is realized by the connection of the lead-out busbar 30, the parallel connection busbar 40 and the connection busbar 50, so that the number of busbars in the parallel connection type circuit breaker structure is as small as possible, the cost is effectively reduced, meanwhile, the wiring structure is simplified, the connection reliability is improved, and the occurrence of connection errors and the like is reduced.

Referring to fig. 1 to 10, in an embodiment, the first circuit breaker 10 and the second circuit breaker 20 are disposed laterally side by side, the parallel busbar 40 is disposed laterally, the first outgoing busbar is connected to one end of the parallel busbar 40, the second outgoing busbar is connected to the other end of the parallel busbar 40, and the parallel busbar 40 is connected to the connection busbar 50, it being understood that the first circuit breaker 10 and the second circuit breaker 20 are spaced apart in a direction perpendicular or approximately perpendicular to a current flowing through the first circuit breaker 10, and may be disposed symmetrically with respect to the current direction, or may be disposed in mirror image, thus being advantageous in saving space in height, and facilitating connection of the busbars, thereby improving wiring regularity and smoothness.

Specifically, when the pin is an input pin, the parallel busbar 40 may be located above the first circuit breaker 10 and the second circuit breaker 20, and when the pin is an output pin, the parallel busbar 40 may be located below the first circuit breaker 10 and the second circuit breaker 20, which is favorable for the first outgoing busbar and the second outgoing busbar led out by the input pin, that is, the first outgoing busbar and the second outgoing busbar led out by the output pin, so that the corresponding outgoing busbar 30 is connected with the corresponding parallel busbar 40, and the reliability and convenience of wiring are improved.

In one embodiment, the connection busbar 50 is connected to the middle position of the parallel busbar 40, and the distance between the connection busbar 50 and the first lead-out busbar is the same as the distance between the connection busbar 50 and the second lead-out busbar, i.e. the connection busbar is centrally arranged, so that the overall current sharing effect is improved.

Referring to fig. 1-8 in combination, in one embodiment, the first outgoing busbar includes a first a-phase outgoing busbar 31, a first B-phase outgoing busbar 32, a first C-phase outgoing busbar 33, the second outgoing busbar includes a second a-phase outgoing busbar 34, a second B-phase outgoing busbar 35, a second C-phase outgoing busbar 36, and the parallel busbar 40 includes an a-phase parallel busbar 41, a B-phase parallel busbar 42, and a C-phase parallel busbar 43; the phase a parallel busbar 41 connects the first phase a outgoing busbar 31 and the second phase a outgoing busbar 34, the phase B parallel busbar 42 connects the first phase B outgoing busbar 32 and the second phase B outgoing busbar 35, and the phase C parallel busbar 43 connects the first phase C outgoing busbar 33 and the second phase C outgoing busbar 36; the three phases of the A-phase parallel busbar 41, the B-phase parallel busbar 42 and the C-phase parallel busbar 43 are staggered in space, so that the effective contact area of each busbar and each breaker with air flow is increased, the heat dissipation dead zone between each busbar is reduced, the gap through which air flow flows can be effectively increased, and the heat dissipation effect of the parallel breaker structure is improved.

Specifically, the first lead-out busbar and the second lead-out busbar are correspondingly arranged, and the first a-phase lead-out busbar 31, the first B-phase lead-out busbar 32 and the first C-phase lead-out busbar 33 are spatially staggered, so that three phases of the a-phase parallel busbar 41, the B-phase parallel busbar 42 and the C-phase parallel busbar 43 are spatially staggered, and it is understood that the second a-phase lead-out busbar 34, the second B-phase lead-out busbar 35 and the second C-phase lead-out busbar 36 are spatially staggered equally, so as to facilitate connection with the a-phase parallel busbar 41, the B-phase parallel busbar 42 and the C-phase parallel busbar 43. The three-phase lead-out busbar is spatially staggered, so that the three phases of the a-phase parallel busbar 41, the B-phase parallel busbar 42 and the C-phase parallel busbar 43 connected to the three-phase lead-out busbar are spatially staggered, thereby improving the heat dissipation effect of the parallel circuit breaker structure.

The staggered arrangement may be based on a horizontal direction perpendicular to the side-by-side direction of the first circuit breaker 10 and the second circuit breaker 20 and/or a vertical direction perpendicular to the horizontal direction, and of course, the staggered arrangement of the three phases of the a-phase parallel busbar 41, the B-phase parallel busbar 42, and the C-phase parallel busbar 43 in space may be implemented based on other directions.

Further, in an embodiment, the outgoing busbar 30 includes a first section 301 connected to a pin of the first circuit breaker 10 or the second circuit breaker 20, a second section 302 connected to the parallel busbar 40, and a third section 303 connecting the first section 301 and the second section 302, where the first section 301 and the second section 302 are parallel, and the first section 301 and the second section 302 are staggered in a horizontal direction, and the horizontal direction is perpendicular to a side-by-side direction of the first circuit breaker 10 and the second circuit breaker 20, it is understood that, on one hand, as shown in fig. 1, by different extension lengths of the third section 303 in each outgoing busbar 30, each parallel busbar 40 connected to the corresponding second section 302 may be staggered in an extension direction (horizontal direction) of the third section 303; on the other hand, by the different extension lengths of the first segment 301 or the second segment 302 in each of the lead-out busbar 30, each of the parallel busbars 40 connected to the corresponding second segment 302 may be staggered in the extension direction (vertical direction) of the second segment 302, and then, in the case of layered arrangement of the lead-out busbar 30 and the parallel busbar 40, the staggered arrangement of the three phases of the a-phase parallel busbar 41, the B-phase parallel busbar 42 and the C-phase parallel busbar 43 in space may be realized by using the extension lengths of the first segment 301 and/or the second segment 302 and/or the third segment, so the arrangement is beneficial to further increasing the effective contact area between each busbar and each breaker and the air flow, reducing the heat dissipation dead zone between each busbar, and further effectively increasing the gap through which the air flow flows, and improving the heat dissipation effect of the parallel breaker structure.

Optionally, in an embodiment, the three phases of the a-phase parallel busbar 41, the B-phase parallel busbar 42 and the C-phase parallel busbar 43 are staggered in a horizontal direction, which is perpendicular to the side-by-side direction of the first circuit breaker 10 and the second circuit breaker 20, and it is understood that the staggered arrangement of the a-phase parallel busbar 41, the B-phase parallel busbar 42 and the C-phase parallel busbar 43 in the horizontal direction can be implemented, for example, by the staggered arrangement of the three phases of the a-phase parallel busbar 41, the B-phase parallel busbar 42 and the C-phase parallel busbar 43 in the horizontal direction.

Optionally, in an embodiment, the three phases of the a-phase parallel busbar 41, the B-phase parallel busbar 42 and the C-phase parallel busbar 43 are staggered in a vertical direction, the vertical direction is perpendicular to a horizontal direction, and the horizontal direction is perpendicular to a side-by-side direction of the first circuit breaker 10 and the second circuit breaker 20, and it is understood that, by using the staggered arrangement of the a-phase parallel busbar 41, the B-phase parallel busbar 42 and the C-phase parallel busbar 43 in the vertical direction, the staggered arrangement of the three phases of the a-phase parallel busbar 41, the B-phase parallel busbar 42 and the C-phase parallel busbar 43 in the vertical direction can be implemented.

In addition, the three phases of the a-phase parallel busbar 41, the B-phase parallel busbar 42 and the C-phase parallel busbar 43 are staggered in the horizontal direction, the three phases of the a-phase parallel busbar 41, the B-phase parallel busbar 42 and the C-phase parallel busbar 43 are staggered in the vertical direction, and the first a-phase extraction busbar 31, the first B-phase extraction busbar 32 and the first C-phase extraction busbar 33 are mutually matched in a staggered manner in space, so that the gap through which the air flow flows can be greatly increased, and the heat dissipation effect of the parallel circuit breaker structure is improved.

Optionally, in an embodiment, the connection busbar 50 includes an a-phase connection busbar 51, a B-phase connection busbar 52, and a C-phase connection busbar 53, where the a-phase connection busbar 51 is connected to an intermediate position of the a-phase parallel busbar 41, the B-phase connection busbar 52 is connected to an intermediate position of the B-phase parallel busbar 42, and the C-phase connection busbar 53 is connected to an intermediate position of the C-phase parallel busbar 43, i.e. the three-phase connection busbar is centrally arranged on the corresponding three-phase parallel busbar, so as to facilitate the overall current equalizing effect.

Further, in an embodiment, the free ends of the a-phase connection busbar 51, the B-phase connection busbar 52, and the C-phase connection busbar 53 are all located on the same plane, and the arrangement is regular, so that the circuit can be conveniently accessed through the power line, and the connection with an external device is convenient, thus being beneficial to improving the connection efficiency and connection reliability. However, in other embodiments, the free ends of the a-phase connection busbar 51, the B-phase connection busbar 52, and the C-phase connection busbar 53 are not in the same plane, which is not limited herein.

Specifically, in an embodiment, as shown in fig. 1 to 3, the first a-phase lead-out busbar 31, the first B-phase lead-out busbar 32, and the first C-phase lead-out busbar 33 are sequentially arranged in a direction close to the second circuit breaker 20, the second a-phase lead-out busbar 34, the second B-phase lead-out busbar 35, and the second C-phase lead-out busbar 36 are sequentially arranged in a direction far away from the first circuit breaker 10, and since the three-phase connection busbars are centrally arranged on the corresponding three-phase parallel busbars, at this time, the a-phase connection busbar 51, the B-phase connection busbar 52, and the C-phase connection busbar 53 are arranged in a staggered manner, and one of the three is in a straight plate structure, and the other three are all in a bent structure, so that the free ends of the a-phase connection busbar 51, the B-phase connection busbar 52 and the C-phase connection busbar 53 are all located on the same plane, thereby facilitating access to a circuit through a power line, and improving connection efficiency and connection reliability.

In another embodiment, as shown in fig. 6 to 8, the first a-phase lead busbar 31, the first B-phase lead busbar 32, and the first C-phase lead busbar 33 are sequentially arranged in a direction approaching the second circuit breaker 20, the second a-phase lead busbar 34, the second B-phase lead busbar 35, and the second C-phase lead busbar 36 are sequentially arranged in a direction approaching the first circuit breaker 10, and according to the arrangement rules of the first a-phase lead busbar 31, the first B-phase lead busbar 32, the first C-phase lead busbar and the second a-phase lead busbar 34, the second B-phase lead busbar 35, and the second C-phase lead busbar 36, the corresponding a-phase parallel busbar 41, B-phase parallel busbar 42, and C-phase parallel busbar 43 are selected and replaced, so that parallel connection of the first lead busbar and the second lead busbar can be realized, and flexible and various applications can meet installation requirements.

And when the first a-phase lead-out busbar 31, the first B-phase lead-out busbar 32, and the first C-phase lead-out busbar 33 are sequentially arranged in a direction approaching the second circuit breaker 20, the second a-phase lead-out busbar 34, the second B-phase lead-out busbar 35, and the second C-phase lead-out busbar 36 are sequentially arranged in a direction approaching the first circuit breaker 10, since the a-phase connection busbar 51 is connected to the middle position of the a-phase parallel busbar 41, the B-phase connection busbar 52 is connected to the middle position of the B-phase parallel busbar 42, and the C-phase connection busbar 53 is connected to the middle position of the C-phase parallel busbar 43, at this time, the a-phase connection busbar 51, the B-phase connection busbar 52, and the C-phase connection busbar 53 are overlapped, which is inconvenient for connection with a power cord, and therefore:

referring to fig. 6-8, in one embodiment, a-phase connection busbar 51 includes a-phase transition busbar 511 and a-phase opposite outer connection busbar 512, B-phase connection busbar 52 includes B-phase transition busbar 521 and B-phase opposite outer connection busbar 522, and C-phase connection busbar 53 includes C-phase transition busbar 531 and C-phase opposite outer connection busbar 532; one end of the phase a switching busbar 511 is connected with the phase a parallel busbar 41, the other end is connected with the phase a opposite external connection busbar 512, one end of the phase B switching busbar 521 is connected with the phase B parallel busbar 42, the other end is connected with the phase B opposite external connection busbar 522, one end of the phase C switching busbar 531 is connected with the phase C parallel busbar 43, the other end is connected with the phase C opposite external connection busbar 532, the free ends of the phase a opposite external connection busbar 512, the phase B opposite external connection busbar 522 and the phase C opposite external connection busbar 532 are all located on the same plane, it is understood that the phase B parallel busbar 42 is located on the phase a parallel busbar 41 and the phase C parallel busbar 43, at this time, the phase B opposite external connection busbar 522 is connected to the end of the phase B switching busbar 521 away from the phase B parallel busbar 42 and is located in the extending direction of the phase B switching busbar 521, the a-phase outer connecting busbar 512 includes an a-phase bending section and an a-phase connecting section, one end of the a-phase bending section is connected with one end of the a-phase switching busbar 511 far away from the a-phase parallel connecting busbar 41, the other end extends towards the B-phase switching busbar 521 and is connected with the a-phase connecting section, the a-phase connecting section is parallel to and located on the same plane with the B-phase outer connecting busbar 522, the C-phase outer connecting busbar 532 includes a C-phase bending section and a C-phase connecting section, one end of the C-phase bending section is connected with one end of the C-phase switching busbar 531 far away from the C-phase parallel connecting busbar 43, the other end extends towards the B-phase switching busbar 521 and is connected with the C-phase connecting section, the C-phase connecting section is parallel to and located on the same plane with the B-phase outer connecting busbar 522, and is arranged regularly, and the connection efficiency and connection reliability are improved by connecting a power line access circuit.

Referring to fig. 11 to 14, in an embodiment, the first circuit breaker 10 and the second circuit breaker 20 are longitudinally arranged in a staggered manner and are connected through the lead-out busbar 30, the parallel busbar 40 and the connection busbar 50, it can be understood that the first circuit breaker 10 and the second circuit breaker 20 are arranged at intervals in the same direction or in a similar direction of the current flowing direction on the circuit breakers, and are arranged in a staggered manner, so that the space on the width is saved, and the lead-out busbar 30 and the parallel busbar 40 are further arranged in a staggered manner in space, so that the heat dissipation effect of the parallel circuit breaker structure is improved; meanwhile, the first leading-out busbar and the second leading-out busbar are conveniently converged through the parallel busbar 40, connection of the connecting busbar 50 is further facilitated, and the device is simple in structure and convenient to wire. In addition, the shapes, the sizes and the like of the three-phase leading-out busbar 30 can be the same, the shapes, the sizes and the like of the three-phase parallel busbar 40 can be the same, the shapes, the sizes and the like of the three-phase connecting busbar 50 can be the same, and the arrangement is standardized, so that the types of the busbar can be further reduced, the cost is saved, and the assembly efficiency is further convenient to improve.

Specifically, the first lead-out busbar includes a first a-phase lead-out busbar 31, a first B-phase lead-out busbar 32, and a first C-phase lead-out busbar 33, the second lead-out busbar includes a second a-phase lead-out busbar 34, a second B-phase lead-out busbar 35, and a second C-phase lead-out busbar 36, the parallel busbar 40 includes an a-phase parallel busbar 41, a B-phase parallel busbar 42, and a C-phase parallel busbar 43, the connection busbar 50 includes an a-phase connection busbar 51, a B-phase connection busbar 52, and a C-phase connection busbar 53, and the corresponding phase busbars are connected, so that the wiring is convenient, the type is simple, and the installation is facilitated.

Optionally, in an embodiment, the outgoing busbar 30 and the parallel busbar 40 are the same busbar, it is understood that the outgoing busbar 30 and the parallel busbar 40 are in an integral structure, and the outgoing busbar 30 and the parallel busbar 40 are fixed into an integral in advance, or the outgoing busbar 30 or the parallel busbar 40 is used to replace an integral formed by connecting the outgoing busbar 30 and the parallel busbar 40, so that the types of the busbar are further reduced, and at this time, only the connecting busbar is required to be connected to the integral formed by connecting the outgoing busbar 30 and the parallel busbar 40, the outgoing busbar 30 or the parallel busbar 40, so that the parallel circuit breaker structure access circuit can be realized.

In another embodiment, as shown in fig. 12, the outgoing busbar 30 and the parallel busbar 40 are different busbars, the connection busbar 50 is respectively connected to the outgoing busbar 30 and the parallel busbar 40, and the outgoing busbar 30 and the parallel busbar 40 are connected to the same side, or different sides, of the connection busbar 50, so as to implement the longitudinal parallel connection of the first circuit breaker 10 and the second circuit breaker 20.

The utility model also provides a converter which comprises a parallel circuit breaker structure, and the specific structure of the parallel circuit breaker structure refers to the embodiment, and as the converter adopts all the technical schemes of all the embodiments, the converter at least has all the beneficial effects brought by the technical schemes of the embodiments, and the description is omitted herein.

Optionally, the converter is configured as a photovoltaic inverter, or a wind power converter, through the arrangement of the parallel circuit breaker structure, the capacity of a circuit breaker in the converter is improved, meanwhile, the capacity of cutting off fault current is improved, the use safety of the converter is improved, and the cost is reduced to a certain extent.

The foregoing description is only of the optional embodiments of the present utility model, and is not intended to limit the scope of the utility model, and all the equivalent structural changes made by the description of the present utility model and the accompanying drawings or the direct/indirect application in other related technical fields are included in the scope of the utility model.

Claims (15)

1. A parallel circuit breaker structure, comprising:

the circuit breaker group comprises a first circuit breaker and a second circuit breaker;

the lead-out busbar comprises a first lead-out busbar and a second lead-out busbar, the first lead-out busbar is connected with the pins of the first circuit breaker, and the second lead-out busbar is connected with the pins of the second circuit breaker;

the first leading-out busbar and the second leading-out busbar are connected with the parallel busbar so as to connect the first circuit breaker and the second circuit breaker in parallel; and

and the connecting busbar is connected with the parallel busbar.

2. The parallel circuit breaker structure of claim 1, wherein the first circuit breaker and the second circuit breaker are disposed laterally side by side, the parallel busbar is disposed laterally, the first outgoing busbar is connected to one end of the parallel busbar, the second outgoing busbar is connected to the other end of the parallel busbar, and the parallel busbar is connected to the connecting busbar.

3. The parallel circuit breaker structure of claim 2, wherein the connection busbar is connected to an intermediate position of the parallel busbar.

4. The parallel circuit breaker structure of claim 2 wherein the first lead-out busbar comprises a first a-phase lead-out busbar, a first B-phase lead-out busbar, a first C-phase lead-out busbar, the second lead-out busbar comprises a second a-phase lead-out busbar, a second B-phase lead-out busbar, a second C-phase lead-out busbar, the parallel busbar comprises an a-phase parallel busbar, a B-phase parallel busbar, and a C-phase parallel busbar;

the phase A parallel busbar is connected with the first phase A outgoing busbar and the second phase A outgoing busbar, the phase B parallel busbar is connected with the first phase B outgoing busbar and the second phase B outgoing busbar, and the phase C parallel busbar is connected with the first phase C outgoing busbar and the second phase C outgoing busbar;

the A-phase parallel busbar, the B-phase parallel busbar and the C-phase parallel busbar are arranged in a staggered mode in space.

5. The parallel circuit breaker structure of claim 4, wherein the first lead-out busbar and the second lead-out busbar are disposed in correspondence, and the first a-phase lead-out busbar, the first B-phase lead-out busbar, and the first C-phase lead-out busbar are disposed in a spatially staggered manner.

6. The parallel circuit breaker structure of claim 5, wherein the lead-out busbar includes a first section connected to a pin of the first circuit breaker or the second circuit breaker, a second section connected to the parallel busbar, and a third section connecting the first section and the second section, the first section and the second section being parallel, and the first section and the second section being disposed offset in a horizontal direction, the horizontal direction being perpendicular to a side-by-side direction of the first circuit breaker and the second circuit breaker.

7. The parallel circuit breaker structure of claim 4, wherein the a-phase parallel busbar, the B-phase parallel busbar, and the C-phase parallel busbar are offset in a horizontal direction, the horizontal direction being perpendicular to a side-by-side direction of the first circuit breaker and the second circuit breaker.

8. The parallel circuit breaker structure of claim 4, wherein the a-phase parallel busbar, the B-phase parallel busbar, and the C-phase parallel busbar are offset in a vertical direction, the vertical direction being perpendicular to a horizontal direction, the horizontal direction being perpendicular to a side-by-side direction of the first circuit breaker and the second circuit breaker.

9. The parallel circuit breaker structure of claim 4, wherein the connection busbar comprises an a-phase connection busbar, a B-phase connection busbar, and a C-phase connection busbar, the a-phase connection busbar being connected to an intermediate position of the a-phase parallel busbar, the B-phase connection busbar being connected to an intermediate position of the B-phase parallel busbar, and the C-phase connection busbar being connected to an intermediate position of the C-phase parallel busbar.

10. The parallel circuit breaker structure of claim 9 wherein the free ends of the a-phase connection busbar, the B-phase connection busbar, and the C-phase connection busbar are all in the same plane.

11. The parallel circuit breaker structure of claim 9 wherein the a-phase connection busbar comprises an a-phase switching busbar and an a-phase opposite external connection busbar, the B-phase connection busbar comprises a B-phase switching busbar and a B-phase opposite external connection busbar, and the C-phase connection busbar comprises a C-phase switching busbar and a C-phase opposite external connection busbar;

one end of the phase A switching busbar is connected with the phase A parallel busbar, the other end of the phase A switching busbar is connected with the phase A opposite external connection busbar, one end of the phase B switching busbar is connected with the phase B parallel busbar, the other end of the phase B switching busbar is connected with the phase B opposite external connection busbar, and one end of the C-phase switching busbar is connected with the C-phase parallel busbar, the other end of the C-phase switching busbar is connected with the C-phase opposite external connection busbar, and the free ends of the A-phase opposite external connection busbar, the B-phase opposite external connection busbar and the C-phase opposite external connection busbar are all positioned on the same plane.

12. The parallel circuit breaker structure of claim 1, wherein the first circuit breaker and the second circuit breaker are arranged longitudinally offset and connected by the lead-out busbar, the parallel busbar and the connection busbar.

13. The parallel circuit breaker structure of claim 12 wherein the lead-out busbar and the parallel busbar are the same busbar;

or the leading-out busbar and the parallel busbar are different busbars, and the connecting busbar is respectively connected with the leading-out busbar and the parallel busbar.

14. A converter comprising a parallel circuit breaker structure according to any one of claims 1 to 13.

15. The converter of claim 14, wherein the converter is configured as a photovoltaic inverter, or a wind power converter.