CN215869174U - Plug-in circuit breaker - Google Patents

Abstract

The utility model provides an inserted circuit breaker, includes two at least circuit breaker poles that set up side by side, and the both ends of every circuit breaker pole are regarded as first wiring end and second wiring end respectively be equipped with the explosion chamber between first wiring end and the second wiring end, be equipped with current transformer between explosion chamber and second wiring end, be equipped with the lightning protection module between current transformer and second wiring end. Compared with the installation mode of assembling the lightning protection module in the cabinet, the plug-in circuit breaker directly assembles the lightning protection module in the circuit breaker, and simplifies the assembly and replacement of the lightning protection module.

Description

Plug-in circuit breaker

Technical Field

The utility model relates to the field of low-voltage electrical appliances, in particular to a plug-in circuit breaker.

Background

The circuit breaker is a switching device capable of closing, carrying and breaking a current under a normal circuit condition and closing, carrying and breaking a current under an abnormal circuit condition within a prescribed time, and is generally classified into a plug-in type, a fixed type and a drawer type circuit breaker according to its installation manner. Wherein, plug-in circuit breaker is used for the communication trade usually, along with the rapid development of communication trade, also more and more high to the requirement of the size and the function of circuit breaker, nevertheless current plug-in circuit breaker itself does not possess the lightning protection module, but assembles the lightning protection module in the rack, and its assembly is comparatively difficult with the dismantlement, is unfavorable for changing the lightning protection module.

Disclosure of Invention

The utility model aims to overcome the defects of the prior art and provides a plug-in circuit breaker with a built-in lightning protection module.

In order to achieve the purpose, the utility model adopts the following technical scheme:

the utility model provides an insertion type circuit breaker, includes at least one circuit breaker utmost point, the first wiring end and second wiring end are regarded as respectively to the both ends of the circuit breaker utmost point, be equipped with operating device, contact mechanism and explosion chamber between the first wiring end of at least one circuit breaker utmost point and second wiring end, and still be equipped with the operating parts at the first wiring end of this circuit breaker utmost point, the operating parts is used for driving the divide-shut brake of circuit breaker with the operating device linkage, be equipped with current transformer between explosion chamber and second wiring end, be equipped with the lightning protection module between current transformer and second wiring end.

Further, including two at least circuit breaker poles that set up side by side, two at least circuit breaker poles include N looks utmost point and at least one L looks utmost point, do not set up current transformer in the N looks utmost point, the lightning protection module sets up between the explosion chamber and the leading-out terminal of N looks utmost point.

Furthermore, one side of the lightning protection module is provided with a circuit board, and the lightning protection module is connected with the circuit board and used for being connected into a main circuit of a breaker pole.

And furthermore, the circuit breaker comprises at least two circuit breaker poles arranged in parallel, an operating mechanism and a contact mechanism are arranged between the first wiring end and the second wiring end of each circuit breaker pole, each contact mechanism comprises a moving contact and a fixed contact which are matched with each other, the operating mechanism is connected with the moving contact and drives the moving contact to perform switching-on and switching-off actions, and the operating mechanisms of the two adjacent circuit breaker poles are linked and connected.

Furthermore, the operating mechanism comprises a linkage piece, a support piece, a jump buckle, a lock catch, a first connecting rod and a second connecting rod, wherein the linkage piece and the support piece are rotatably assembled in the middle of the pole of the circuit breaker; the linkage pieces of all the breaker poles are in linkage connection through a linkage shaft, and the lock catches of two adjacent breaker poles are in linkage connection.

Furthermore, a tripping device connected with the lightning protection module is arranged in each circuit breaker pole, and when the lightning protection module breaks down, the tripping device triggers the operating mechanism to trip.

Furthermore, a tripping device is arranged in one of the circuit breaker poles, the lightning protection modules of at least two circuit breaker poles are connected with the same tripping device, and when any one lightning protection module breaks down, the tripping device triggers the operating mechanism of the circuit breaker pole where the tripping device is located to trip and drives the operating mechanisms of other circuit breaker poles to trip.

Furthermore, the tripping device and the arc extinguish chamber are arranged between the contact mechanism and the second wiring end in parallel, and one end of the tripping device is opposite to the lock catch of the operating mechanism.

Furthermore, the tripping device comprises a short-circuit protection element, a coil of the short-circuit protection element is electrically connected with a second wiring terminal arranged on the second wiring terminal through a flexible connection, and the current transformer is connected to the flexible connection in a penetrating manner.

Further, two at least circuit breaker utmost points include N looks utmost point and at least one L looks utmost point, are equipped with trip gear in one of them L looks utmost point, trip gear is connected with the lightning protection module of each circuit breaker utmost point still be equipped with overload protection mechanism in the L looks utmost point, overload protection mechanism sets up in one side of operating device, overload protection mechanism and trip gear are located operating device's both sides respectively.

Furthermore, a first wiring terminal is arranged on the first wiring terminal, a static contact is arranged at one end of the first wiring terminal, and the static contact extends to one side of the operating mechanism along the side of the N-phase pole to serve as a static contact to be matched with the moving contact.

Furthermore, an electric operation module is arranged between two adjacent circuit breaker poles and is driven by a control circuit board of the circuit breaker, and the electric operation module is matched with an operating mechanism of one circuit breaker pole to realize automatic opening and closing of the circuit breaker.

Further, be equipped with first wiring mouth at the first wiring end of every circuit breaker utmost point one side of first wiring mouth is equipped with the operating parts hole operating parts downthehole the operating parts is equipped with the operating parts, the operating parts is including sliding the button that sets up in first wiring mouth operating parts and first wiring mouth between be equipped with the partition portion.

Further, including the shell, the shell includes that a plurality of installation cavities that hold each circuit breaker utmost point of divided reserve in the installation cavity of each circuit breaker utmost point has the cavity that is used for assembling the lightning protection module, and the cavity opening of a plurality of cavities sets up side by side and forms the mounting groove of strideing across a plurality of cavity openings with one side of shell jointly, the lightning protection module passes through the assembly that the mounting groove corresponds in the cavity of each circuit breaker utmost point, and the lightning protection module of a plurality of circuit breaker utmost points is connected with same circuit board electricity, the circuit board is installed in the mounting groove, the mounting groove is closed by the apron lid.

Compared with the installation mode of assembling the lightning protection module in the cabinet, the plug-in circuit breaker directly assembles the lightning protection module in the circuit breaker and is positioned between the current transformer and the second wiring end, so that the assembly and the replacement of the lightning protection module are simplified.

In addition, the cavity opening that is used for assembling the lightning protection module in all circuit breaker poles is located same one side, forms a mounting groove that can directly assemble all lightning protection modules from the outside on the shell, and especially all lightning protection modules can be connected in advance and carry out integrative assembly again on same circuit board, have simplified the assembling process of lightning protection module, further improve the assembly convenience.

In addition, an electric operation module linked with the operation mechanism is arranged between two adjacent L-phase poles, so that the circuit breaker can realize automatic opening and closing.

Drawings

Fig. 1 is a schematic diagram of a plug-in circuit breaker of the present invention;

fig. 2 is a schematic view of a structure of a plug-in type circuit breaker of the present invention;

fig. 3 is an exploded schematic view of a plug-in circuit breaker of the present invention;

fig. 4 is a circuit diagram of a plug-in circuit breaker of the present invention (including a plurality of trip units);

fig. 5 is a circuit diagram of a plug-in circuit breaker of the present invention (including a trip device);

fig. 6 is a schematic structural view of a mounting groove in a plug-in type circuit breaker according to the present invention;

fig. 7 is a schematic diagram of an L-phase pole structure in a plug-in circuit breaker according to the present invention;

FIG. 8 is a front view of FIG. 7;

fig. 9 is a schematic diagram of an N-phase pole structure in a plug-in circuit breaker according to the present invention;

fig. 10 is a front view of fig. 9 (without the conductive structure).

Detailed Description

The following describes a plug-in circuit breaker according to an embodiment of the present invention with reference to the embodiments shown in fig. 1 to 10. A plug-in type circuit breaker of the present invention is not limited to the description of the following embodiments.

An embodiment of a circuit breaker is a plug-in circuit breaker and comprises a shell 1, wherein at least one circuit breaker pole is arranged on the shell 1, two ends of the circuit breaker pole are respectively used as a first wiring end and a second wiring end, a first wiring port is arranged on the first wiring end, a first wiring terminal is correspondingly arranged on the first wiring port, a second wiring port is arranged on the second wiring end, the second wiring port adopts a socket structure, and a second wiring terminal with a bus clamp 7721 is correspondingly arranged in the second wiring port; an operating mechanism 74 and a contact mechanism are arranged between the first wiring terminal and the second wiring terminal, the operating mechanism 74 is in linkage connection with the contact mechanism, and the operating mechanism 74 drives the contact mechanism to perform opening and closing actions so as to control a main circuit connected between the first wiring terminal and the second wiring terminal; an arc extinguish chamber 72 is arranged between the contact mechanism and the second connecting terminal, and a current transformer 73 is arranged between the arc extinguish chamber 72 and the second connecting terminal; an operating piece 71 is further arranged on the first terminal of at least one breaker pole, an operating piece hole is formed in one side of the first wiring port, the operating piece 71 is assembled in the operating piece hole, and the operating piece 71 is linked with the operating mechanism 74 and used for manually operating the opening and closing of the breaker. The operating element 71 of the present embodiment is a button that is linearly slidably disposed, and one end of the button that extends into the circuit breaker pole is linked to the operating mechanism 74, and the opening and closing of the circuit breaker can be manually operated by pressing the button. Of course, as another embodiment, the operating member may be a swing handle mechanism.

Further, the circuit breaker includes a plurality of circuit breaker poles that set up side by side, and the operating device 74 linkage of two adjacent circuit breaker poles is connected, and at least one circuit breaker pole is equipped with operating parts 71, and perhaps every circuit breaker pole all is equipped with operating parts 71, and the operating parts 71 linkage of two adjacent circuit breaker poles is connected for realize the manual divide-shut brake of multipole circuit breaker. Preferably, be provided with the control scheme board and by control scheme board driven electric operating module 6 between two circuit breaker poles that one of them is adjacent, electric operating module 6 cooperates with the operating device 74 of one of them circuit breaker pole, and the operating device 74 of all the other circuit breaker poles is driven in order to realize the automatic divide-shut brake of circuit breaker, only needs to set up one electric operating module 6 and can realize automatic divide-shut brake.

An improvement point of this application lies in, inserts a lightning protection module 5 in the main line of circuit breaker utmost point, lightning protection module 5 is located between current transformer 73 and the second wiring end, through place lightning protection module 5 in the circuit breaker in, has simplified lightning protection module 5's assembly, does benefit to assembly and change.

Preferably, when comprising at least two breaker poles arranged in parallel, the lightning protection modules 5 of two adjacent breaker poles are connected in parallel. The at least two breaker poles include N extremely 3 and at least one L extremely 2 of looks, do not set up current transformer 73 in the N extremely 3 of looks, lightning protection module 5 sets up between explosion chamber 72 and the terminal 772 that goes out of N extremely 3 of looks. Specifically, in this application, the first wiring terminal of each breaker pole is an incoming line terminal, the first wiring port and the first wiring terminal that are arranged at the first wiring terminal are an incoming line port and an incoming line terminal 771 respectively, the second wiring terminal is an outgoing line terminal, the second wiring port and the second wiring terminal that are arranged at the second wiring terminal are an outgoing line port and an outgoing line terminal 772, the plurality of breaker poles of the breaker include at least one N-phase pole 3 and at least one L-phase pole 2, in the L-phase pole 2, the first pin of the lightning protection module 5 is connected with the outgoing line terminal 772 of the L-phase pole 2, the second pin is connected with the outgoing line terminal 772 of the N-phase pole 3, and in the N-phase pole 3, the first pin and the second pin of the lightning protection module 5 are connected with the outgoing line terminal 772 of the N-phase pole 3 respectively. Of course, when the first connection terminal is the wire outlet terminal 772 and the second connection terminal is the wire inlet terminal 771, the first pin of the lightning protection module 5 in the L-phase pole 2 is connected to the wire inlet terminal 771 of the L-phase pole 2, the second pin is connected to the wire inlet terminal 771 of the N-phase pole 3, and in the N-phase pole 3, the first pin and the second pin of the lightning protection module 5 are respectively connected to the wire inlet terminal 771 of the N-phase pole.

Another improvement point of this application lies in, lightning protection module 5 cooperates with trip gear 4 in the circuit breaker for whether the realization is in normal operating condition to lightning protection module 5 and monitors. The at least one circuit breaker pole is also internally provided with a control device 53 for triggering the tripping device 4, the control device 53 is used for being connected with an external power supply to form a control circuit for triggering the tripping device 4, a switching device is connected between the tripping device 4 and the control device 53, and the switching device is triggered when the lightning protection module 5 acts or fails due to the realization of a lightning protection function, so that the control device 53 triggers the tripping device 4 to drive the operating mechanism 74 to trip, and accordingly, the lightning protection module 5 can be judged to be in a fault state, the circuit breaker can not be normally used, and the use safety of the circuit breaker is improved.

Specifically, the control device 53 is configured to be connected to an external power supply to form a control circuit for triggering the trip device 4, the trip device 4 may be an electromagnetic trip, the control device 53 includes a control chip, a diode and other elements, and is configured to trigger the trip device 4 to drive the operating mechanism 74 to trip, the switching device is the micro switch 52, where the micro switch 52 may be the micro switch 52 integrated in the lightning protection module 5 or the external micro switch 52 matched with the lightning protection module 5, and the micro switch 52 is triggered to be closed when the lightning protection module 5 fails, which is the prior art in the field and is not described again. One improvement point of the application is that a switching device matched with the lightning protection module 5 is connected between the tripping device 4 and the control device 53, when the lightning protection module 5 generates lightning protection action, the lightning protection module 5 already realizes the function of providing lightning protection for the circuit breaker, when the switching device is triggered, the control device triggers the tripping device 4, the circuit breaker is tripped, power is off, and protection is further provided for the circuit breaker, so that the circuit breaker has double guarantee; or when the lightning protection module 5 has a fault to trigger the switch device, the tripping device 4 is still triggered to trip and power off the circuit breaker, so that the use safety of the circuit breaker is provided.

Preferably, the circuit breaker includes a plurality of circuit breaker poles that are equipped with lightning protection module 5, and operating device 74 linkage connection of two adjacent circuit breaker poles sets up trip unit 4 in one of them circuit breaker pole, and the lightning protection module 5 of two at least circuit breaker poles is connected with same trip unit 4 through respective switching device, and a plurality of lightning protection modules 5 share trip unit 4, and not only occupation space is little and reduce cost. Preferably, the tripping device 4 is only arranged in one circuit breaker pole, the other circuit breaker poles are not provided with the tripping devices 4, the control circuits of the lightning protection modules 5 of all the circuit breaker poles are all connected with the same tripping device 4, when one lightning protection module 5 generates a lightning protection action or fails, the tripping mechanism 4 triggers the corresponding operating mechanism 74 to trip, and the operating mechanism 74 drives the other operating mechanisms 74 to trip. Preferably, the tripping device 4 is arranged in an L-phase pole 2. It is obvious that as another embodiment, a tripping device 4 cooperating with the operating mechanism 74 can also be provided in each circuit breaker pole, the tripping devices 4 in the circuit breaker poles being connected in parallel.

Preferably, the circuit breaker further comprises a circuit board 51, a control device 53 of the circuit breaker pole is arranged on the circuit board 51, the control device 53 can obtain signals fed back by other internal devices (such as a current transformer 73) and can transmit the signals to the outside besides obtaining signals fed back by the lightning protection module 5, and meanwhile, the control device 53 also has the functions of remotely controlling the on-off of the circuit breaker, controlling the electric operation module 6, obtaining external control signals and the like; the switching device is electrically connected with the circuit board 51 and is connected between the tripping device 4 and the control device 53 through the circuit board 51, the lightning protection module 5 is connected with the circuit board 51 and is connected into a main circuit of a corresponding breaker pole, and the control device 53 is connected with an external power supply through the circuit board 51, so that the wiring is simplified through the circuit board 51. Preferably, the lightning protection modules 5 and the switching devices of the plurality of breaker poles are electrically connected to the same circuit board 51, which facilitates not only wiring but also sharing of one trip device 4, and the lightning protection modules 5 are integrally mounted on the circuit board 51, thereby achieving integral assembly. Preferably, the lightning protection modules 5 of at least two breaker poles are connected to the same control device 53 on the circuit board 51, the switching devices of at least two breaker poles are connected in parallel between the same trip device 4 and the same control device 53, and the same control device 53 on the circuit board 51 is shared.

Referring to fig. 4 and 5, a connection relationship between the lightning protection module 5 and the trip device 4 is described in detail, as shown in fig. 4 and 5, in the L-phase pole 2, the first pin of the lightning protection module 5 is electrically connected to the outlet terminal 772 of the L-phase pole 2, the second pin of the lightning protection module 5 is electrically connected to the outlet terminal 772 of the N-phase pole 3, and in the N-phase pole 3, the first pin and the second pin of the lightning protection module 5 are respectively electrically connected to the outlet terminal 772 of the N-phase pole 3.

As shown in fig. 4, a tripping device 4 cooperating with an operating mechanism 74 is disposed in each breaker pole, a lightning protection module 5, a control device 53 and a switch device are disposed in each breaker pole, the switch device is a micro switch 52, the control device 53 includes elements such as a control chip and a diode, the control device 53 is connected with an external power supply to form a control circuit for controlling the tripping device 4, the micro switch 52 is connected between the control device 53 and the tripping device 4, the on-off of the control circuit is controlled by the micro switch 52, preferably, the micro switch 52 and the control device 53 are disposed on a circuit board 51, a first pin of the micro switch 52 is connected with a first pin of the tripping device 4, a second pin of the micro switch 52 is connected with a first pin of the control device 53, and a second pin of the control device 53 is connected with the external power supply through the circuit board 51, the second pin of the trip device 4 is directly connected to the circuit board 51, and at this time, the first pin and the second pin of the trip device 4 are not at the same potential, and when the lightning protection module 5 generates a lightning protection action or fails to close the microswitch 52, the control circuit is turned on, so that the control device 53 drives the trip device 4 to trigger the operating mechanism 74 to trip.

Further, as shown in fig. 5, when only one L-phase pole 2 is provided with the trip device 4, the first pins of the micro switches 52 of all the lightning protection modules 5 are connected in parallel through the circuit board 51, and then connected with the first pin of the trip device 4, the second pin of the switch device of each circuit breaker pole is connected with the corresponding first pin of the control device 53 through the circuit board 51 or connected with the same control device 53, the second pin of the control device 53 is connected with an external power supply through the circuit board 51, the second pin of the trip device 4 is connected with the circuit board 51, the circuit board 51 is electrically connected with the outlet 772 terminal of each circuit breaker pole, when one of the lightning protection modules 5 generates a lightning protection action or fails, the micro switch 52 of the lightning protection module 5 is closed to conduct the control circuit controlled by the micro switch 52, the trip device 4 triggers the operating mechanism 74 to trip after obtaining the external power supply, the operating mechanisms 74 of the other breaker poles are also tripped by the linkage.

Preferably, the circuit board 51 is disposed at one side of the lightning protection module 5 and is disposed in each breaker pole in a penetrating manner, that is, all the lightning protection modules 5 share one circuit board 51, which simplifies the wiring process.

Further, as shown in fig. 6, the housing 1 includes a plurality of separated installation cavities for accommodating the circuit breaker poles, a cavity a for assembling the lightning protection module 5 is reserved in the installation cavity of each circuit breaker pole, the cavity openings of the plurality of cavities a are arranged side by side on the same side of the housing 1 to jointly form an installation groove 11 spanning the plurality of cavity openings, the lightning protection module 5 is assembled in the cavity a of each circuit breaker pole through the installation groove 11, the circuit board 51 is installed in the installation groove 11, and the installation groove 11 is covered by the cover plate 12. The preferred chamber opening direction is perpendicular to the direction of inserting the breaker into the cabinet, and such a structure is favorable for the assembly of the lightning protection module 5, and in addition, when a plurality of lightning protection modules 5 share one circuit board 51, the mounting groove 11 arranged on one side of the shell 1 is also favorable for the assembly of the circuit board 51.

With reference to fig. 1-3 and 6-10, an embodiment of a layout structure of a circuit breaker is provided, in this embodiment, the circuit breaker includes four breaker poles arranged in parallel, one of which is an N-phase pole 3, and the other three of which are L-phase poles 2.

As shown in fig. 2, 3, 7 and 8, L looks utmost point 2 includes L looks shell 21, L looks shell 21 includes upper cover and base, and the inlet wire end and the outlet wire end are regarded as respectively to the both ends of L looks shell 21 the inlet wire end is equipped with inlet wire and outlet wire respectively with the outlet wire end inlet wire opening and outlet wire correspond respectively and are equipped with inlet wire terminal 771 and outlet wire terminal 772 one side of inlet wire is equipped with the operating parts hole, in the operating parts downthehole operating parts 71 with L looks shell 21 sliding fit that is equipped with, operating parts 71 and outlet wire terminal 772 set up along the same one side of L looks utmost point 2, and the operating parts 71 linkage of two adjacent L looks utmost point 2 is connected.

An operating mechanism 74, a contact mechanism, an arc extinguish chamber 72, a current transformer 73 and a lightning protection module 5 are arranged between the incoming terminal 771 and the outgoing terminal 772, the operating mechanism 74 and the contact mechanism are arranged in the middle of the L-phase pole 2, the contact mechanism comprises a moving contact 751 and a fixed contact 752 which are matched with each other, the moving contact 751 is connected to the operating mechanism 74, the fixed contact 752 is fixedly arranged on one side of the L-phase shell 21, and the arc extinguish chamber 72, the current transformer 73 and the lightning protection module 5 are sequentially arranged between the contact mechanism and the outgoing terminal 772. Further, an overload protection mechanism 76 is disposed on one side of the operating mechanism 74, and the overload protection mechanism 76 cooperates with the operating mechanism 74 to trigger the operating mechanism 74 to trip in the event of an overload failure. As shown in fig. 3, an electrical operation module 6 is disposed between two adjacent L-phase poles 2, the electrical operation module 6 is driven and controlled by a control circuit board (not shown), in this embodiment, the control circuit board may be composed of a circuit board 51 and a control device 53 disposed on the circuit board 51, and all the lightning protection modules 5 share one control device 53; the side wall of one L-phase shell 21 is provided with a communication hole, the electric operation module 6 penetrates through the communication hole to be in linkage connection with the operating mechanism 74 of the L-phase pole 2, the electric operation module 6 comprises a motor 61 and a gear set 62, wherein the motor 61 is in drive connection with a control circuit board, the output end of the motor 61 is in meshing connection with the gear set 62, the gear set 62 at least comprises an output gear and a plurality of transmission gears in transmission connection between the motor 61 and the output gear, the output gear penetrates through the communication hole to extend into the L-phase pole 2 to be in meshing connection with a linkage member 741 of the operating mechanism 74, and when the motor 61 is driven to rotate forwards or backwards, the circuit breaker is driven to perform automatic opening and closing.

Specifically, the operating member 71 includes a button and a connecting member, one end of the button is slidably fitted in the operating member hole, one end of the button is connected to the connecting member provided in the L-phase housing 21 through a connecting rod, and the connecting member is linked to the operating mechanism 74, or the operating member 71 is an integrated mechanism, and one end of the operating member extending into the L-phase housing 21 is linked to the operating mechanism 74. As shown in fig. 3, 6 and 8, a position-limiting portion is provided between the operation member hole of the L-phase housing 21 and the wire inlet, and the position-limiting portion is used to isolate the operation member 71 from the wire inlet terminal 771, thereby preventing the wire from being wound and causing inconvenience in operation. Preferably, the limiting portion includes a connecting arm 131 formed by projecting the L-phase housing 21 and a limiting shaft 132 disposed on the connecting arm 131, the limiting shaft 132 separates the operating element 71 from the wire inlet, as shown in fig. 6 and 8, the connecting arm 131 is disposed only on two circuit breaker poles located on the side (i.e., located on one L-phase pole 2 and one N-phase pole 3, respectively), and one limiting shaft 132 is disposed between the two connecting arms 131, so that the operating elements 71 of all circuit breaker poles are commonly separated by the same limiting shaft 132.

The operating mechanism 74 includes a linkage 741, a support, a trip, a latch 742, a first link and a second link, the linkage 741 and the support are rotatably mounted in the middle of the breaker poles, the movable contact 751 is connected to the support, the trip and the latch 742 are rotatably mounted on the support, the trip is connected to one end of the latch 742 by a snap-fit, the latch 742 includes a first cantilever and a second cantilever, a trip hook is disposed on the second cantilever, the first link and the second link are respectively disposed on the linkage 741, the linkage 741 is connected to the operating element 71 through the first link, the linkage 741 is connected to the support through the second link, a gear tooth is disposed on a side of the linkage 741 facing the wire inlet, the gear tooth is engaged with the output gear of the electric operating module 6, the support is connected to the movable contact 751, the linkage 741 of all the breaker poles is connected to the linkage 743 through a linkage shaft, the latches 742 of two adjacent breaker poles are linked.

As shown in fig. 7 and 8, the overload protection mechanism 76 is disposed on one side of the operating mechanism 74, preferably, the overload protection mechanism 76 and the fixed contact 752 are located on the same side of the L-phase housing 21, the overload protection mechanism 76 includes a bimetal, a movable end of the bimetal is opposite to the trip hook of the lock 742, and when an overload fault occurs, the bimetal is heated and bent to cooperate with the trip hook to trip the operating mechanism 74.

A trip device 4 is disposed in at least one L-phase pole 2, as shown in fig. 8, the trip device 4 is disposed between the contact mechanism and the current transformer 73 in parallel with the arc extinguish chamber 72 in the L-phase pole 2, preferably, the trip device 4 and the overload protection mechanism 76 are disposed on two sides of the operating mechanism 74, wherein the trip device 4 includes a short-circuit protection element, the short-circuit protection element includes a coil 41 and a movable iron core driven by the coil 41, one end of the movable iron core is opposite to the first suspension arm of the latch 742, the coil 41 is connected with the outlet terminal 772 through a flexible connection, the current transformer 73 is connected in the flexible connection in a penetrating manner, and the current transformer 73 transmits the collected current signal to the control circuit board. Of course, when the trip device 4 is not disposed in the L-phase pole 2, the outlet terminal 772 and the moving contact 751 are electrically connected through a soft connection, and the current transformer 73 is also connected through the soft connection for collecting current signals.

As shown in fig. 6 and 7, a cavity a for assembling the lightning protection module 5 is reserved in the middle of the L-phase housing 21, the cavity a is located between the current transformer 73 and the outlet terminal 772, an opening of the cavity a faces the outside of the L-phase housing 21, cavity openings of adjacent L-phase poles 2 are arranged side by side, and openings of all the cavity a can be covered by one cover plate 12.

The first pin of the lightning protection module 5 is connected with the outlet terminal 772 of the L-phase pole 2, the second pin is connected with the outlet terminal 772 of the N-phase pole 3, preferably, a circuit board 51 is arranged on one side of the lightning protection module 5, the circuit board 51 is arranged on one side of all the lightning protection modules 5 along the inner side of the cover plate 12 in a penetrating manner, the first pin and the second pin of the lightning protection module 5 are respectively connected with the circuit board 51, the lightning protection modules 5 of two adjacent L-phase poles 2 are connected in parallel through the circuit board 51, and when one tripping device 4 is arranged in each L-phase pole 2, each tripping device 4 is respectively connected with the circuit board 51 so as to be connected with the lightning protection module 5 of each L-phase pole 2; when only one tripping device 4 is arranged in one L-phase pole 2, the first pins of the microswitches 52 in all the lightning protection modules 5 are connected in parallel through the circuit board 51 and then connected to the first pin of the tripping device 4, and the second pin of the tripping device 4 is directly connected to the circuit board 51.

In this embodiment, the wire outlet terminal 772 includes a bus clamp 7721 and a connecting plate 7722, the bus clamp 7721 is welded to one end of the connecting plate 7722, the bus clamp 7721 is disposed in the wire outlet and can be connected to an external wire through a plug connection, the connecting plate 7722 is disposed along the inner side of the L-phase housing 21 and is connected to the movable contact 751 through a flexible connection, preferably, the other end of the connecting plate 7722 is disposed along one side of the lightning protection module 5 and is bent toward one end parallel to the lightning protection module 5, in fig. 7, the connecting plate 7722 is first disposed along the right side of the lightning protection module 5 and then is bent to extend into between the arc extinguish chamber 72 and the lightning protection module 5 and to be parallel and opposite to one end of the lightning protection module 5 facing the arc extinguish chamber 72, and of course, the other end of the connecting plate 7722 may also be located at one end of the lightning protection module 5 far from the arc extinguish chamber 72 and be parallel and opposite to the end.

Describing the N-phase pole 3 in detail with reference to fig. 2, 3, 9 and 10, where the N-phase pole 3 is a most lateral breaker pole, the N-phase pole 3 includes an N-phase housing 31 surrounded by an upper cover and a base, the N-phase pole 3 is spliced to one side of the most lateral L-phase pole 2 through the N-phase housing 31, two ends of the N-phase housing 31 are respectively provided with a wire inlet and a wire outlet, an operating element hole is arranged on one side of the wire inlet, an operating element 71 identical to the L-phase pole 2 is assembled in the operating element hole, and the operating element 71 of the N-phase pole 3 is linked with the operating element 71 of the adjacent L-phase pole 2; the same as the L-phase pole 2, an operating mechanism 74, a contact mechanism, an arc extinguish chamber 72 and a lightning protection module 5 are arranged between the wire inlet and the wire outlet, the operating mechanism 74 and a moving contact 751 of the contact mechanism are linked and arranged in the middle of the N-phase shell 31, the arc extinguish chamber 72 is arranged between the wire outlet 772 and the contact mechanism, different from the L-phase pole 2, the current transformer 73 and the overload protection mechanism 76 are not arranged in the N-phase pole 3, the lightning protection module 5 is arranged between the arc extinguish chamber 72 and the wire outlet 772, and a first pin and a second pin of the lightning protection module 5 are respectively and electrically connected with the wire inlet 771 and the wire outlet 772. In addition, the movable contacts 751 may be formed by stacking two or more movable contacts 751 to increase current-carrying capacity.

In addition, a static contact is arranged at one end of the incoming line terminal 771 arranged on the N-phase pole 3 and extends to one side of the operating mechanism 74 along the inner side of the N-phase shell 31 to serve as a static contact 752 to be matched with the movable contact 751, the outgoing line terminal 772 arranged on the N-phase pole 3 also comprises a bus clamp 7721 and a connecting plate 7722, the bus clamp 7721 is arranged in the outgoing line port, the bus clamp 7721 is connected with an external PE line, the connecting plate 7722 is welded with one end of the bus clamp 7721, the connecting plate 7722 is arranged along one side attached to the lightning protection module 5, in fig. 9, the connecting plate 7722 is arranged attached to the upper surface of the lightning protection module 5, and the other end of the connecting plate 7722 is arranged in parallel along one end of the lightning protection module 5 and is connected with the movable contact 751 through a flexible connection. Further, a socket structure may be provided on one side of the outlet, and a conductive structure connected in parallel with the bus-bar clamp 7721 is further provided in the socket structure to increase the current-carrying capacity.

In addition, a trip device 4 similar to the L-phase pole 2 may be provided in the N-phase pole 3, the trip device 4 may be arranged in parallel with the arc extinguishing chamber 72, one end of the trip device 4 may face the latch 742 of the operating mechanism 74, and the lightning protection module 5 of the N-phase pole 3 may be connected to the trip device 4 of the N-phase pole 3.

As shown in fig. 2, a chamber a for assembling the lightning protection module 5 is also reserved in the N-phase housing 31, an opening of the chamber a is arranged in parallel with a chamber opening of the L-phase housing 21, and the chamber a of the N-phase pole 3 and the chambers a of all the L-phase poles 2 jointly form the mounting groove 11, so that all the lightning protection modules 5 can be firstly arranged in parallel on the circuit board 51 and then assembled together in each circuit breaker pole, thereby simplifying the assembling and wiring process.

The foregoing is a more detailed description of the utility model in connection with specific preferred embodiments and it is not intended that the utility model be limited to these specific details. For those skilled in the art to which the utility model pertains, several simple deductions or substitutions can be made without departing from the spirit of the utility model, and all shall be considered as belonging to the protection scope of the utility model.

Claims (14)

1. The utility model provides a plug-in circuit breaker, includes at least one circuit breaker utmost point, and the both ends of circuit breaker utmost point are regarded as first wiring end and second wiring end respectively, are equipped with operating device, contact mechanism and explosion chamber (72) between the first wiring end of at least one circuit breaker utmost point and second wiring end, and still are equipped with operating parts (71) at the first wiring end of this circuit breaker utmost point, and operating parts (71) and operating device (74) linkage are used for driving the divide-shut brake of circuit breaker, its characterized in that: a current transformer (73) is arranged between the arc extinguish chamber (72) and the second terminal, and a lightning protection module (5) is arranged between the current transformer (73) and the second terminal.

2. A plug-in circuit breaker as claimed in claim 1, characterized in that: including two at least circuit breaker utmost point that set up side by side, two at least circuit breaker utmost points include N looks utmost point (3) and at least one L looks utmost point (2), do not set up current transformer (73) in N looks utmost point (3), lightning protection module (5) set up between explosion chamber (72) and outlet terminal (772) of N looks utmost point (3).

3. A plug-in circuit breaker as claimed in claim 1, characterized in that: one side of the lightning protection module (5) is provided with a circuit board (51), and the lightning protection module (5) is connected with the circuit board (51) and used for being connected into a main circuit of a breaker pole.

4. A plug-in circuit breaker as claimed in claim 1 or 2, characterized in that: the circuit breaker comprises at least two circuit breaker poles arranged in parallel, an operating mechanism (74) and a contact mechanism are arranged between a first terminal and a second terminal of each circuit breaker pole, the contact mechanism comprises a moving contact (751) and a fixed contact (752) which are matched with each other, the operating mechanism (74) is connected with the moving contact (751) and drives the moving contact (751) to perform opening and closing actions, and the operating mechanisms (74) of two adjacent circuit breaker poles are connected in a linkage manner.

5. A plug-in circuit breaker as claimed in claim 4, characterized in that: the operating mechanism (74) comprises a linkage piece (741), a supporting piece, a trip, a lock catch (742), a first connecting rod and a second connecting rod, the linkage piece (741) and the supporting piece are rotatably assembled in the middle of a pole of the circuit breaker, the trip and the lock catch (742) are rotatably assembled on the supporting piece, the trip is in snap-fit connection with one end of the lock catch (742), the linkage piece (741) is connected with the operating piece (71) through the first connecting rod, the linkage piece (741) is in linkage connection with the supporting piece through the second connecting rod, and the supporting piece is connected with the movable contact (751); the linkage pieces (741) of all the breaker poles are in linkage connection through one linkage shaft (743), and the latches (742) of two adjacent breaker poles are in linkage connection.

6. A plug-in circuit breaker as claimed in claim 4, characterized in that: a tripping device (4) connected with the lightning protection module (5) is arranged in each circuit breaker pole, and when the lightning protection module (5) breaks down, the tripping device (4) triggers the operating mechanism (74) to trip.

7. A plug-in circuit breaker as claimed in claim 4, characterized in that: the tripping device (4) is arranged in one of the circuit breaker poles, the lightning protection modules (5) of at least two circuit breaker poles are connected with the same tripping device (4), and when any one lightning protection module (5) breaks down, the tripping device (4) triggers the operating mechanism (74) of the circuit breaker pole where the tripping device is located to trip and drives the operating mechanisms (74) of other circuit breaker poles to trip.

8. A plug-in circuit breaker according to claim 6 or 7, characterized in that: the tripping device (4) and the arc extinguish chamber (72) are arranged between the contact mechanism and the second terminal in parallel, and one end of the tripping device (4) is opposite to the lock catch (742) of the operating mechanism (74).

9. A plug-in circuit breaker according to claim 6 or 7, characterized in that: the tripping device (4) comprises a short-circuit protection element, a coil (41) of the short-circuit protection element is electrically connected with a second wiring terminal arranged on the second wiring terminal through flexible connection, and a current transformer (73) is connected to the flexible connection in a penetrating mode.

10. A plug-in circuit breaker as claimed in claim 7, characterized in that: the circuit breaker is characterized in that the at least two circuit breaker poles comprise an N-phase pole (3) and at least one L-phase pole (2), a tripping device (4) is arranged in one of the L-phase poles (2), the tripping device (4) is connected with a lightning protection module (5) of each circuit breaker pole, an overload protection mechanism (76) is further arranged in the L-phase pole (2), the overload protection mechanism (76) is arranged on one side of an operating mechanism (74), and the overload protection mechanism (76) and the tripping device (4) are respectively located on two sides of the operating mechanism (74).

11. A plug-in circuit breaker as claimed in claim 10, characterized in that: and a first connecting terminal is arranged on the first connecting terminal, and one end of the first connecting terminal is provided with a static contact and extends to one side of the operating mechanism (74) along the side of the N-phase pole (3) to be used as a static contact (752) to be matched with the movable contact (751).

12. A plug-in circuit breaker as claimed in claim 4, characterized in that: be provided with electric operation module (6) between two adjacent circuit breaker poles, electric operation module (6) are driven by the control scheme board of circuit breaker, and electric operation module (6) realizes the automatic divide-shut brake of circuit breaker with operating device (74) cooperation of one of them circuit breaker pole.

13. A plug-in circuit breaker as claimed in claim 4, characterized in that: be equipped with first wiring mouth at the first terminal of every circuit breaker utmost point one side of first wiring mouth is equipped with the operating parts hole operating parts downthehole (71) that are equipped with, operating parts (71) are including sliding the button that sets up in first wiring mouth operating parts (71) and first wiring mouth between be equipped with the partition portion.

14. A plug-in circuit breaker as claimed in claim 4, characterized in that: including shell (1), shell (1) is including a plurality of installation cavity that hold each circuit breaker utmost point of divided, reserves cavity (a) that are used for assembling lightning protection module (5) in the installation cavity of each circuit breaker utmost point, and the cavity opening of a plurality of cavities (a) sets up side by side and forms jointly and stride across a plurality of cavity open-ended mounting grooves (11) with the same one side of shell (1), the assembly that lightning protection module (5) correspond through mounting groove (11) is in cavity (a) of each circuit breaker utmost point, and lightning protection module (5) of a plurality of circuit breaker utmost point are connected with same circuit board (51) electricity, circuit board (51) are installed in mounting groove (11), mounting groove (11) are closed by apron (12) lid.

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