CN217933682U - Multi-breakpoint circuit breaker - Google Patents

Abstract

The utility model provides a multi-break point circuit breaker, includes load (1) and circuit breaker body (2), circuit breaker body (2) with load (1) is connected, the both ends of load (1) respectively have at least one to divide disconnected utmost point, its characterized in that: the breaker body (2) is connected with a switching conductor (302) which can change the heterodromous current in at least two breaking poles (b) directly connected with the two ends of the load (1) into the homodromous current, so that the breaking capacity of the multi-breakpoint breaker is improved.

Description

Multi-breakpoint circuit breaker

Technical Field

The utility model belongs to the technical field of low-voltage apparatus, specifically say so and relate to a multi-break point circuit breaker.

Background

With the development of new energy technology, higher requirements are put on low-voltage electrical appliance components, especially in a photovoltaic power supply direct current system, the rated working voltage of the low-voltage electrical appliance is even as high as DC1500V. The breaking performance of the circuit breaker can be improved by adopting a multi-breakpoint series connection method. Further, when all the breaking poles of the direct current molded case circuit breaker are arranged at one end of the load, the current directions of all the breaking poles can be the same by connecting the load side of one breaking pole in series with the power side of the other breaking pole.

However, when there are breaking poles at both ends of a load connected to the dc molded case circuit breaker, the directions of currents in the two breaking poles connected to the load are opposite, so that the directions of arc currents at break points of the two breaking poles are opposite, and the arcs repel each other. If the two arcs travel at different speeds, the slower arc may be repelled by the faster moving arc and may not reach the arc chute.

SUMMERY OF THE UTILITY MODEL

The utility model aims at exactly when the both ends of the load that connect to above-mentioned current direct current moulded case circuit breaker all have disconnected utmost point, connect two disconnected electric current opposite direction in extremely of load, make these two disconnected electric arc opposite direction in extremely breakpoint of branch, arouse electric arc to repel each other, thereby reduce the defect of circuit breaker breaking capacity, a multi-break circuit breaker is provided, the current direction in disconnected extremely of the both ends that make multi-break circuit breaker lug connection load through the switching conductor is the same, thereby improve the disconnected performance of circuit breaker.

Technical scheme

In order to realize the technical purpose, the utility model provides a pair of multi-break point circuit breaker, including load 1 and circuit breaker body, the circuit breaker body with the load is connected, the both ends of load respectively have at least one to divide disconnected utmost point, its characterized in that: the circuit breaker body is connected with a switching conductor which can change the heterodromous current in at least two breaking poles directly connected with the two ends of the load into the homodromous current so as to improve the breaking capacity of the multi-breakpoint circuit breaker;

the circuit breaker body at least comprises a first breaking electrode and a second breaking electrode, a first wiring terminal and a second wiring terminal are correspondingly arranged at two ends of a contact system of the first breaking electrode, a third wiring terminal and a fourth wiring terminal are correspondingly arranged at two ends of a contact system of the second breaking electrode, at least the first breaking electrode and the second breaking electrode are directly connected with a load, and a second switching electrode is arranged at two ends of a contact system of the second switching electrode.

The short-circuit conductors in corresponding quantity can short-circuit the disjunction electrodes directly connected with the load and other disjunction electrodes positioned on the same side of the load;

the number of the short-circuit conductors corresponds to the number of the breaking poles which are not directly connected with the two ends of the load, and currents in all the breaking poles in the circuit breaker with 3 or more breaking poles can be enabled to be in the same direction through the switching poles, the switching conductors and the short-circuit conductors, so that the breaking capacity of the circuit breaker is improved.

Furthermore, the switching conductor comprises a first switching conductor and a second switching conductor, a first terminal and a second terminal are correspondingly arranged at two ends of the first switching conductor, and a third terminal and a fourth terminal are correspondingly arranged at two ends of the second switching conductor;

one end of the first switching conductor is connected with a wiring terminal IV which is positioned on the load side and is positioned on a switching pole at one end of the load and directly connected with the load, the other end of the first switching conductor is connected with a connecting part I of the switching pole positioned on the power supply side, one end of the second switching conductor is connected with a connecting part II of the switching pole positioned on the load side, and the other end of the second switching conductor is connected with a wiring terminal which is positioned on the power supply side and is disconnected with a disconnection pole at the same end of the load.

Furthermore, one end of the load is connected with the connecting terminal of the breaking pole on the load side, and the other end of the load is connected with the connecting terminal of the breaking pole on the load side; one end of the power supply is connected with a power supply side wiring terminal of one of the disjunction poles located at the same end of the load, and the other end of the power supply is connected with a wiring terminal of the switching pole located at the power supply side of one of the disjunction poles located at the same end of the load.

Further, the other end of the second through conductor is connected with a third connecting terminal of which the through pole is positioned on the power supply side.

Furthermore, one end of the load is connected with a second wiring terminal of the first breaking electrode on the load side, and the other end of the load is connected with a fourth wiring terminal of the second breaking electrode on the load side; one end of the power supply is connected with a first wiring terminal on the power supply side of the first disjunction electrode, and the other end of the power supply is connected with a third wiring terminal on the power supply side of the switching electrode.

Furthermore, one end of each short-circuit conductor in the corresponding number of short-circuit conductors is connected with a wiring terminal on the load side of one disjunction pole, and the other end of each short-circuit conductor is connected with a wiring terminal on the power supply side of the other disjunction pole on the same end of the load.

Furthermore, the wiring terminals at two ends of the first breaking electrode and the second breaking electrode are positioned outside the cavity of the breaker body.

Furthermore, two ends of the load are positioned on one side of the breaker body, and two ends of the power supply are positioned on the other side of the breaker body.

Further, still include the series connection mounting panel, the series connection mounting panel install in the bottom of circuit breaker body, the short circuit conductor and the switching conductor of corresponding quantity are located the space that series connection mounting panel and circuit breaker body bottom formed.

Further, an insulating piece is arranged between the first switching conductor and the second switching conductor to insulate the first switching conductor and the second switching conductor.

Further, a corresponding number of shorting conductors and transfer conductors are pre-arranged in the series mounting plate.

Further, the short circuit conductor and the switching conductor of corresponding quantity do not preset in the series connection mounting panel, during the installation, after corresponding quantity short circuit conductor and switching conductor and circuit breaker body match the installation, the series connection mounting panel matches the installation with the circuit breaker body.

Furthermore, one part of the short-circuit conductors and the switching conductors in the corresponding number is not preset in the series connection mounting plate, the rest parts are preset in the series connection mounting plate, and during installation, after the conductors not preset in the series connection mounting plate are installed with the circuit breaker body in a matched mode, the series connection mounting plate is installed with the circuit breaker body in a matched mode.

Advantageous effects

The utility model provides a pair of multi-break point circuit breaker, when the both ends to load all had disconnected utmost point among the current multi-break point moulded case circuit breaker, the current opposite direction in the disconnected utmost point of lug connection load is disconnected for these two of lug connection load divide the electric arc current opposite direction in the disconnected utmost point's breakpoint, arouse electric arc to repel each other, thereby reduce the defect of circuit breaker breaking capacity, this multi-break point circuit breaker, it is the same to make the current direction in disconnected utmost point of the both ends of multi-break point circuit breaker lug connection load through the switching conductor, thereby improve the breaking performance of circuit breaker. And two power end binding post are located circuit breaker one side, and two load end binding post are located the circuit breaker opposite side, and convenience of customers uses.

Drawings

Fig. 1a is a schematic diagram of a connection circuit of a two-pole disconnecting circuit breaker in embodiment 1 of the present invention;

fig. 1b is a schematic perspective view of a two-pole breaker according to embodiment 1 of the present invention;

fig. 1c is a schematic view of the structure of the transfer electrode in embodiment 1 of the present invention;

FIG. 1d is a bottom view of FIG. 1b with the tandem mounting plate removed;

fig. 1e is a schematic view of a first transition conductor structure in embodiment 1 of the present invention;

fig. 1f is a schematic view of a first transition conductor structure in embodiment 1 of the present invention;

fig. 1g is a schematic view of a second via conductor structure in embodiment 1 of the present invention;

fig. 1h is a schematic view of a second adapting conductor structure in embodiment 1 of the present invention;

fig. 1i is a first schematic structural view of an insulating member according to embodiment 1 of the present invention;

FIG. 1j is a schematic structural view of an insulating member in embodiment 1 of the present invention;

fig. 2a is a schematic diagram of a three-pole disconnecting circuit breaker connection circuit in embodiment 2 of the present invention;

fig. 2b is a schematic perspective view of a three-pole breaker according to embodiment 2 of the present invention;

fig. 2c is a schematic view of the installation of the series connection installation plate, the short-circuit conductor, the transfer conductor and the insulator in embodiment 2 of the present invention;

fig. 2d is an exploded view of fig. 2 c.

Fig. 3a is a first schematic wiring diagram of a three-pole disconnecting circuit breaker connection circuit in embodiment 4 of the present invention;

fig. 3b is a second schematic wiring diagram of a three-pole disconnecting circuit breaker connection circuit according to embodiment 4 of the present invention;

fig. 4a is a first schematic wiring diagram of a four-pole disconnecting circuit breaker connection circuit in embodiment 5 of the present invention;

fig. 4b is a second schematic wiring diagram of a four-pole disconnecting circuit breaker connection circuit according to embodiment 5 of the present invention;

fig. 5 is a schematic connection diagram of a connection circuit of a rotary double-breakpoint contact system in embodiment 6 of the present invention;

fig. 6 is a schematic diagram of a connection circuit of a bridge-type double-breakpoint contact system in embodiment 7 of the present invention.

Detailed Description

The technical solutions of the present invention will be described more clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "inside", "outside", "front", "back", "left", "right", "side for common use", "side for standby" and the like indicate the directions or positional relationships based on the directions or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood as a specific case by those skilled in the art.

The present invention will be described in further detail below with reference to specific embodiments and with reference to the attached drawings.

When the both ends of the load that current multi-break moulded case circuit breaker connects all had disconnected utmost point, the current direction in the disconnected utmost point of lug connection load is opposite for the arc current direction in these two disconnected utmost point's of lug connection load break off the breakpoint is opposite, arouses electric arc repulsion each other, thereby reduces circuit breaker breaking capacity, for solving this difficult problem, the utility model provides a multi-break point circuit breaker, simultaneously for more accurate explanation, this embodiment will have the utmost point definition of contact system to be disconnected utmost point, as shown in figure 1a, including load 1 and circuit breaker body 2, circuit breaker body 2 with load 1 connects, load 1's both ends respectively have one disconnected utmost point at least, circuit breaker body 2 is connected with switching conductor 302 can become with the equidirectional electric current among two at least disconnected utmost points b of load 1 both ends direct links to each other thereby improves multi-break point moulded case circuit breaker's ability.

The direct connection comprises that a breaking pole connected with a load is connected with the load through a conductor, the breaking pole is directly connected with the load, and the breaking pole is connected with the load through a transfer conductor.

In order to achieve the above technical object, the present embodiment takes a two-pole breaker as an example for explanation. Wherein, the power source side and the load side are respectively arranged at the outermost side of the two sides of the breaker body, specifically, as shown in fig. 1b and 1c, the breaker body 2 at least comprises a first breaking pole 202 and a second breaking pole 202', and at least the first breaking pole 202 and the second breaking pole 202' are electrically separated, in this embodiment, two ends of the load 1 are respectively provided with a breaking pole b, and then two ends of the load 1 are respectively provided with a breaking pole b, namely, a first breaking pole 202 and a second breaking pole 202'. The two ends of the contact system of the first breaking pole 202 are correspondingly provided with a first connecting terminal 202a and a second connecting terminal 202b, the two ends of the contact system of the second breaking pole 202' are correspondingly provided with a third connecting terminal 202c and a fourth connecting terminal 202d, the first breaking pole 202 and the second breaking pole 202' are connected with the load 1, the second breaking pole 202' is a transfer pole 202e, the two ends of the contact system of the transfer pole 202e are correspondingly provided with a first connecting part 202e01 located on a power supply side and a second connecting part 202e02 located on a load side, the first connecting part 202e01 is electrically separated from the third connecting terminal 202c, and the second connecting part 202e02 is electrically separated from the fourth connecting terminal 202 d. In this embodiment, the connection terminals at both ends of the first breaking electrode 202 and the second breaking electrode 202' are located outside the cavity of the circuit breaker body 2. Both ends of the load 1 are located at one side of the breaker body 2, and both ends of the power source 4 are located at the other side of the breaker body 2.

The via conductor 302 has one end connected to the corresponding connection portion of the corresponding via electrode 202e and the other end connected to the connection terminal on the corresponding side of the corresponding divided electrode on the same load side as the corresponding via electrode 202 e. Specifically, as shown in fig. 1b to 1j, the transition conductor 302 includes a first transition conductor 302a and a second transition conductor 302b, and an insulating member 6 is disposed between the first transition conductor 302a and the second transition conductor 302b to insulate the two. The first switching conductor 302a is provided with a first terminal 302a01 and a second terminal 302a02 at two ends thereof, and the second switching conductor 302b is provided with a third terminal 302b01 and a fourth terminal 302b02 at two ends thereof. One end of the first transfer conductor 302a is connected with a terminal fourth 202d, which is positioned on the load side, of a transfer electrode 202e which is positioned on one end of the load 1 and is directly connected with the load, the other end of the first transfer conductor is connected with a connecting part first 202e01, which is positioned on the power supply side, of the transfer electrode 202e, one end of the second transfer conductor 302b is connected with a connecting part second 202e02, which is positioned on the load side, of the transfer electrode 202e, and the other end of the second transfer conductor is connected with a terminal which is positioned on the power supply side and is positioned on the breaking electrode at the same end as the load. Specifically, in this embodiment, the other end of the second via conductor 302b is connected to the third connection terminal 202c of the via electrode 202e located on the power supply side.

One end of the load 1 is connected with a wiring terminal of the first breaking electrode 202 on the load side, and the other end of the load 1 is connected with a wiring terminal of the second breaking electrode 202' on the load side; one end of the power supply 4 is connected with a power supply side wiring terminal of one of the disjunctor electrodes of the disjunctor electrode 202 located at the same end of the load, and the other end of the power supply 4 is connected with a power supply side wiring terminal of one of the disjunctor electrodes of the switching electrode 202e located at the same end of the load. Specifically, in this embodiment, one end of the load 1 is connected to the second terminal 202b of the first disjunction electrode 202, which is located on the load side, and the other end of the load 1 is connected to the fourth terminal 202d of the second disjunction electrode 202', which is located on the load side; one end of the power supply 4 is connected with a first connection terminal 202a on the power supply side of the first disjunction electrode, and the other end of the power supply 4 is connected with a third connection terminal 202c on the power supply side of the second disjunction electrode 202 e.

Specifically, in the present embodiment, two ends of the load 1 are located on one side of the circuit breaker body 2, i.e., the second wiring terminal 202b and the fourth wiring terminal 202d are located on one side of the circuit breaker body 2, i.e., the lower side of fig. 1b, i.e., the load side. The two ends of the power source 4 are located on the other side of the breaker body 2, i.e. the first connection terminal 202a and the third connection terminal 202c are located on the other side of the breaker body 2, i.e. the upper side of fig. 1b, i.e. the power source side. The first wiring terminal 202a, the second wiring terminal 202b, the third wiring terminal 202c and the fourth wiring terminal 202d are located on the outermost side of the circuit breaker body 2, and for fig. 1b, the first wiring terminal 202a and the second wiring terminal 202b are located on the rightmost side of the circuit breaker body 2, and the third wiring terminal 202c and the fourth wiring terminal 202d are located on the leftmost side of the circuit breaker body 2.

Still include series connection mounting panel 5 in this embodiment, series connection mounting panel 5 install in the bottom of circuit breaker body 2, switching conductor 302 is located the space that series connection mounting panel 5 and circuit breaker body 2 bottom formed. The specific assembly implementation process of the embodiment is as follows: as shown in fig. 1c to 1j, the second adapting conductor 302b is installed first, specifically, the first threaded hole 203a is formed at the movable contact connecting portion 203 (i.e., the second connecting portion 202e 02), and one end 302b02 of the second adapting conductor 302b is connected to the movable contact connecting portion 203 from the bottom of the circuit breaker body 2 by a screw. The other end 302b01 of the second via conductor 302b corresponds to the third terminal 202c, and the insulator 6 is nested on the second via conductor 302 b. Next, the first transition conductor 302a is installed, specifically, a second threaded hole 201a is formed in the fixed contact connecting portion 201 (i.e., the first connecting portion 202e 01), one end 302a01 of the first transition conductor 302a is connected to the fixed contact connecting portion 201 from the bottom of the circuit breaker body 2 by using a screw, and the other end 302a02 of the first transition conductor 302a corresponds to the fourth connecting terminal 202 d. And finally, installing the series mounting plate 5, specifically, arranging a clamping hook on the series mounting plate 5, and arranging a clamping groove on the bottom of the circuit breaker body 2, so that the series mounting plate 5 and the clamping groove are connected into a whole. Or the two are integrated by means of bonding. Or the series mounting plate 5 is provided with a countersunk through hole, the bottom of the breaker body 2 is provided with a blind hole, and the blind hole are connected into a whole through a tapping screw so as to finish mounting. When the power supply and the load are connected, the other end 302b01 of the second transit conductor 302b is connected with the power supply through the third connecting terminal 202c, the other end 302a02 of the first transit conductor 302a is connected with the load through the fourth connecting terminal 202d, the first connecting terminal 202a is connected with the power supply, the second connecting terminal 202b is connected with the load, and the current flowing through the first disjunctor 202 and the second disjunctor 202' are in the same direction.

Example 2

As shown in fig. 2a and 2b, in this embodiment, a 3-pole breaker is taken as an example for explanation, and the breaker further includes a corresponding number of short-circuit conductors 301, where the short-circuit conductors 301 in the corresponding number can short-circuit a breaking pole b directly connected to the load 1 and other breaking poles located on the same side of the load 1 as the breaking pole b; the number of the short-circuit conductors 301 corresponds to the number of the breaking poles which are not directly connected with the two ends of the load 1, and currents in all the breaking poles of the circuit breaker with 3 or more breaking poles can be enabled to be in the same direction through the transfer poles 202e, the transfer conductors 302 and the short-circuit conductors 301, so that the breaking capacity of the circuit breaker is improved. One end of each short-circuit conductor 301 in the corresponding number is connected with a wiring terminal on the load side of one disjunction pole, and the other end of each short-circuit conductor is connected with a wiring terminal on the power supply side of the other disjunction pole on the same end of the load. In this embodiment, as shown in fig. 2a and 2b, the short-circuit protection circuit includes a first breaking pole 202, a second breaking pole 202', and a third breaking pole 202", wherein two ends of the third breaking pole 202" are respectively provided with a fifth connection terminal 202f and a sixth connection terminal 202g, the second breaking pole 202' is a transit pole 202e, one end of the short-circuit conductor 301 is connected to the first connection terminal 202a on the power supply side of the first breaking pole 202, and the other end of the short-circuit conductor is connected to the sixth connection terminal 202g on the load side of the third breaking pole 202 "of the first breaking pole 202 located on the same load side.

In this embodiment, a corresponding number of shorting conductors 301 and transfer conductors 302 are located in the space formed by the series mounting plate 5 and the bottom of the circuit breaker body 2. As shown in fig. 2c and 2d, a corresponding number of shorting conductors 301 and transfer conductors 302 are predisposed in the series mounting board 5. The shorting conductor 301 and the first relay conductor 302a are embedded in the series mounting plate 5, the insulator 6 is embedded in the series mounting plate 5, and the second relay conductor 302b is embedded in the insulator 6, so that the series mounting plate 5, the shorting conductor 301, the first relay conductor 302a, the insulator 6, and the second relay conductor 302b are integrated. The insulator 6 insulates the first transition conductor 302a and the second transition conductor 302b from each other.

Threaded holes are formed in the matching positions of the lower end of the first transfer conductor 302a, the upper end of the second transfer conductor 302b and the two ends of the short-circuit conductor 301 with the corresponding wiring terminals. During wiring, arrange series connection mounting panel 5 in 2 bottoms on the circuit breaker body, the bolt passes the through-hole on the binding post and twists the screw hole of twisting short circuit conductor 301 both ends, makes corresponding binding post and short circuit conductor 301 electricity be connected. The fixed contact connecting portion 201 (i.e. the first connecting portion 202e 01) has a threaded hole, the upper end of the first transition conductor 302a and the series mounting plate 5 have corresponding through holes, and a screw passes through the through hole on the series mounting plate 5 to electrically connect the upper end of the first transition conductor 302a and the fixed contact connecting portion 201. The movable contact connecting portion 203 (i.e., the second connecting portion 202e 02) has a threaded hole, the lower end of the second adapting conductor 302b and the series mounting plate 5 have corresponding through holes, and a screw passes through the through hole of the series mounting plate 5 to electrically connect the lower end of the second adapting conductor 302b and the movable contact connecting portion. Finally, the holes in the series mounting plate 5 are sealed by a first cover plate 7 and a second cover plate 8. After the power supply and the load are connected, the upper end of the second transfer conductor 302b is connected with the power supply through the third wiring terminal 202c, the lower end of the first transfer conductor 302a is connected with the load through the fourth wiring terminal 202d, the fifth wiring terminal 202f on the power supply side of the third disjunction electrode 202' is connected with the power supply, the second wiring terminal 202b is connected with the load, and the directions of currents flowing through the three disjunction electrodes are the same.

Example 3

In this embodiment, as shown in fig. 2c, a part of the short-circuit conductors 301 and the transfer conductors 302 in a corresponding number is not preset in the series-connection mounting plate 5, and the other part is preset in the series-connection mounting plate 5, and during installation, after the conductors not preset in the series-connection mounting plate 5 are installed in a manner of being matched with the circuit breaker body 2, the series-connection mounting plate 5 is installed in a manner of being matched with the circuit breaker body 2. Specifically, the first transition conductor 302a and the short-circuit conductor 301 are embedded in the series mounting board 5. When the installation is performed, the second via conductor 302b is installed, the insulator 6 is installed, and the series installation plate 5 is installed.

Example 4

As shown in fig. 3a and 3b, the connection lines as shown in the figures can realize that the arc current directions of all breakpoints of all disjunctions positioned on the power supply side are the same, or the arc current directions of all breakpoints of all disjunctions positioned on the load side are the same, or the arc current directions of all breakpoints of all disjunctions positioned in the disjunctions are the same.

Example 5

As shown in fig. 4a and 4b, the connection lines as shown in the figures can realize that the arc current directions of all breakpoints of all disjunctions positioned on the power supply side are the same, or the arc current directions of all breakpoints of all disjunctions positioned on the load side are the same, or the arc current directions of all breakpoints of all disjunctions positioned in the disjunctions are the same.

Example 6

As shown in fig. 5, in the rotary double break circuit breaker, the breaking pole includes a break point on the power source side and a break point on the load side by wiring as shown in the figure. The arc current direction is the same for all breakpoints. The electric arcs of all breakpoints on the power supply side synchronously enter the arc extinguish chamber on the power supply side, and the electric arcs of all breakpoints on the load side synchronously enter the arc extinguish chamber on the load side.

Example 7

As shown in fig. 6, in the bridge type double-break-point circuit breaker, the breaking pole includes a break point on the power source side and a break point on the load side. Although the arc current directions of all the breakpoints on the power supply side are opposite to the arc current directions of all the breakpoints on the load side, the arc current directions of all the breakpoints on the power supply side are the same, and the arc current directions of all the breakpoints on the load side are also the same, so that the arcs of all the breakpoints on the power supply side synchronously enter the arc extinguish chamber on the power supply side, and the arcs of all the breakpoints on the load side synchronously enter the arc extinguish chamber on the load side.

The above embodiments 4,5,6, and 7 are all based on the technical principle of the present invention that as the number of the breaker breaking poles increases, the short-circuit conductor and the switching conductor are used to change the direction of the current at the two ends of the load, so as to improve the breaking capacity of the dc breaker. It should be noted that, simultaneously, there are multiple modes in the mounting means of series connection mounting panel 5, short circuit conductor 301, switching conductor 302, insulator 6 and circuit breaker body 2, and any mounting means that receives the embodiment of the present invention teaches all should be regarded as falling into the protection scope of the present invention.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that; the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims (14)

1. The utility model provides a multi-break point circuit breaker, includes load (1) and circuit breaker body (2), circuit breaker body (2) with load (1) is connected, the both ends of load (1) respectively have at least one to divide utmost point, its characterized in that: the breaker body (2) is connected with a switching conductor (302) which can change the heterodromous current in at least two breaking poles (b) directly connected with the two ends of the load (1) into the homodromous current, so that the breaking capacity of the multi-breakpoint breaker is improved;

the breaker body (2) at least comprises a first breaking pole (202) and a second breaking pole (202 '), wherein a first connecting terminal (202 a) and a second connecting terminal (202 b) are respectively arranged at two ends of a contact system of the first breaking pole (202), a third connecting terminal (202 c) and a fourth connecting terminal (202 d) are respectively arranged at two ends of a contact system of the second breaking pole (202'), at least the first breaking pole (202) and the second breaking pole (202 ') are directly connected with a load (1), the second breaking pole (202') is a transfer pole (202 e), a first connecting part (202 e 01) positioned on a power supply side and a second connecting part (202 e 02) positioned on a load side are respectively arranged at two ends of the contact system of the transfer pole (202 e), the first connecting part (202 e 01) and the connecting terminal positioned on the power supply side are electrically separated, the second connecting part (202 e 02) and the connecting terminal positioned on the load side are electrically separated, and at least two connecting poles directly connected with two ends of the load (1) can be changed into different breaking currents in a breaker body so as to improve the breaking capacity of the breaker.

2. A multi-break point circuit breaker as claimed in claim 1, wherein: the short-circuit conductors (301) in corresponding quantity are further included, and the short-circuit conductors (301) in corresponding quantity can be used for short-circuiting a disjunction electrode (b) directly connected with the load (1) and other disjunction electrodes positioned on the same side of the load (1) with the disjunction electrode (b);

the number of the short-circuit conductors (301) corresponds to the number of the disjunction poles which are not directly connected with the two ends of the load (1), and currents in all disjunction poles of 3 disjunction poles and more than 3 disjunction poles can be enabled to be in the same direction through the switching poles (202 e), the switching conductors (302) and the short-circuit conductors (301), so that the disjunction capacity of the circuit breaker is improved.

3. A multi-break point circuit breaker as claimed in claim 1 or 2, wherein: the transit conductor (302) comprises a first transit conductor (302 a) and a second transit conductor (302 b), wherein two ends of the first transit conductor (302 a) are respectively provided with a first terminal (302 a 01) and a second terminal (302 a 02), and two ends of the second transit conductor (302 b) are respectively provided with a third terminal (302 b 01) and a fourth terminal (302 b 02);

one end of the first transfer conductor (302 a) is connected with a connection terminal four (202 d) which is positioned on the load side of a transfer pole (202 e) which is positioned at one end of the load (1) and is directly connected with the load, the other end of the first transfer conductor is connected with a connection part I (202 e 01) which is positioned on the power supply side of the transfer pole (202 e), one end of the second transfer conductor (302 b) is connected with a connection part II (202 e 02) which is positioned on the load side of the transfer pole (202 e), and the other end of the second transfer conductor is connected with a connection terminal which is positioned on the power supply side of a disjunction pole at the same end as the load.

4. A multi-break point circuit breaker as claimed in claim 1 or 2, wherein: one end of the load (1) is connected with a wiring terminal of the first breaking electrode (202) on the load side, and the other end of the load (1) is connected with a wiring terminal of the second breaking electrode (202') on the load side; one end of the power supply (4) is connected with a power supply side wiring terminal of one of the disjunction poles of the disjunction pole I (202) which is positioned at the same end of the load, and the other end of the power supply (4) is connected with a power supply side wiring terminal of one of the disjunction poles of the disjunction pole I (202 e) which is positioned at the same end of the load.

5. A multi-break point circuit breaker as claimed in claim 3, wherein: the other end of the second via conductor (302 b) is connected to a third connection terminal (202 c) of the via electrode (202 e) on the power supply side.

6. A multi-break point circuit breaker as claimed in claim 4, wherein: one end of the load (1) is connected with a second connecting terminal (202 b) of the first disjunction electrode (202) on the load side, and the other end of the load (1) is connected with a fourth connecting terminal (202 d) of the second disjunction electrode (202') on the load side; one end of the power supply (4) is connected with a first connecting terminal (202 a) on the power supply side of the first disjunction electrode (202), and the other end of the power supply (4) is connected with a third connecting terminal (202 c) on the power supply side of the changeover electrode (202 e).

7. A multi-break point circuit breaker as claimed in claim 2, wherein: one end of each short-circuit conductor (301) in the corresponding number is connected with a wiring terminal on the load side of one disjunction pole, and the other end of each short-circuit conductor is connected with a wiring terminal on the power supply side of the other disjunction pole on the same end of the load.

8. A multi-break point circuit breaker as claimed in claim 1, wherein: at least the wiring terminals at two ends of the first breaking pole (202) and the second breaking pole (202') are positioned outside the cavity of the breaker body (2).

9. A multi-break point circuit breaker as claimed in claim 1, wherein: two ends of the load (1) are positioned on one side of the breaker body (2), and two ends of the power supply (4) are positioned on the other side of the breaker body (2).

10. A multi-break point circuit breaker as claimed in claim 1 or 2, wherein: still include series connection mounting panel (5), series connection mounting panel (5) install in the bottom of circuit breaker body (2), short circuit conductor (301) and switching conductor (302) of corresponding quantity are located the space that series connection mounting panel (5) and circuit breaker body (2) bottom formed.

11. A multi-break point circuit breaker as claimed in claim 3, wherein: an insulating piece (6) is arranged between the first transition conductor (302 a) and the second transition conductor (302 b) to insulate the first transition conductor and the second transition conductor.

12. A multi-break point circuit breaker as claimed in claim 10, wherein: a corresponding number of shorting conductors (301) and transfer conductors (302) are pre-arranged in the series mounting plate (5).

13. A multi-break point circuit breaker as claimed in claim 10, wherein: short circuit conductor (301) and switching conductor (302) of corresponding quantity do not preset in series connection mounting panel (5), during the installation, after corresponding quantity short circuit conductor (301) and switching conductor (302) and circuit breaker body (2) match the installation, series connection mounting panel (5) and circuit breaker body (2) match the installation.

14. A multi-break point circuit breaker as claimed in claim 10, wherein: one part of the short-circuit conductors (301) and the switching conductors (302) in corresponding quantity is not preset in the series mounting plate (5), the other part of the short-circuit conductors is preset in the series mounting plate (5), and when the short-circuit conductors and the switching conductors are installed, the conductors which are not preset in the series mounting plate (5) are installed in a matched mode with the circuit breaker body (2), and then the series mounting plate (5) is installed in a matched mode with the circuit breaker body (2).

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