CN218160225U - Circuit breaker - Google Patents

Abstract

The utility model belongs to the technical field of the circuit breaker technique and specifically relates to a circuit breaker is related to. The method comprises the following steps: the device comprises a shell, a controller, a tripping component, an operating mechanism, a contact system, a detection module, a plug connection structure and a signal terminal; the controller, the operating mechanism, the contact system, the detection module, the plug connection structure and the signal terminal are sequentially arranged along the depth direction from the front side to the back side of the shell, and the tripping assembly is arranged on the left side and/or the right side of the operating mechanism; the area of the front part of the circuit breaker is reduced to the greatest extent, and the effects of miniaturization, intellectualization, easy installation and convenient maintenance are realized.

Description

Circuit breaker

Technical Field

The utility model belongs to the technical field of the circuit breaker technique and specifically relates to a circuit breaker is related to.

Background

Circuit breakers can be used to distribute electrical energy, protect power lines and motors, and automatically shut off circuits when they experience severe overload or short and undervoltage faults, and generally do not require component changes after breaking the fault current. At present, the circuit breaker has been widely applied in the field of electrical appliance safety and is an integral part of people's life.

The current breaker cavity has set gradually each functional unit such as load interface, arc extinguishing system, contact system, release and power source along length direction in the cavity, leads to openly area occupied great, makes cubical switchboard space utilization low, unsatisfied narrow and small space's installation demand. At present, the switch cabinet tends to be developed in the direction of miniaturization, intellectualization, high performance and easy maintenance, and the structure of the existing circuit breaker is difficult to meet the requirements.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a circuit breaker to it is great to solve the positive area occupied of current circuit breaker, makes cubical switchboard space utilization low, unsatisfied narrow and small space installation demand's technical problem.

The utility model provides a pair of circuit breaker, include: the device comprises a shell, a controller, a tripping assembly, an operating mechanism, a contact system, a detection module, a plug connection structure and a signal terminal;

the controller, the operating mechanism, the contact system, the detection module, the plug connection structure and the signal terminal are sequentially arranged along the depth direction from the front side to the back side of the shell, and the tripping assembly is arranged on the left side and/or the right side of the operating mechanism;

the front surface of the shell is provided with a surface cover, the surface cover is provided with a handle hole, and a handle of the operating mechanism extends out of the handle hole;

the contact system comprises a moving contact and a fixed contact, the moving contact is connected with a conductive piece, and the conductive piece and the fixed contact are both conducted with the plug connection structure;

the operating mechanism is used for driving the moving contact to be connected with or disconnected from the fixed contact, and the tripping assembly is used for pushing the traction rod of the operating mechanism to rotate to the circuit breaker to trip and power off.

As a further technical scheme, the drawing device comprises a first shaft, a fixing piece and a connecting rod for being matched and connected with the outside, and the shell is also provided with an upper cover positioned on the back side of the face cover;

the upper cover is provided with a movable groove, the first shaft is fixedly connected into the movable groove through the fixing piece, one end of the connecting rod is provided with a mounting hole, and the connecting rod is rotatably connected to the first shaft through the mounting hole;

the connecting rod is also provided with a hook which is used for being matched and connected with the outside and a seventh bulge which is used for enabling the hook to rotate out of the movable groove.

As a further technical scheme, the circuit breaker tripping protection device further comprises a backup protection device for pushing the draw bar to rotate to the circuit breaker tripping power-off, the shell is further provided with a base located on the back side of the face cover, the base is provided with an A-phase through hole, a B-phase through hole and a C-phase through hole, and the backup protection device is arranged at least one of the A-direction through hole, the B-phase through hole and the C-phase through hole;

the backup protection device comprises an armature and a magnetic yoke which are mutually matched, the moving contact is connected to the conductive piece through a flexible coupling, an area with an opening facing to the front is formed between the armature and the magnetic yoke in a surrounding mode, and the flexible coupling penetrates through the area along the depth direction of the shell.

As a further technical solution, the plug connection structure includes a first bridge contact and a second bridge contact;

the static contact is inserted into the opening at one end of the first bridge-type contact, or the static contact is connected to a conductive plate, and the conductive plate is inserted into the opening at one end of the first bridge-type contact;

the conductive piece is inserted into the opening at one end of the second bridge contact, or the conductive piece comprises a conductive rod and a connecting bar, the moving contact is connected to the conductive rod through a flexible joint, the conductive rod is connected to the connecting bar, and the connecting bar is inserted into the opening at one end of the second bridge contact.

As a further technical solution, the housing further has a middle cover located at the back side of the front cover, and the trip assembly includes a first trip device disposed on the middle cover and/or a second trip device disposed on the middle cover.

As a further technical scheme, the middle cover is provided with the first release and the second release, and the first release and the second release are respectively located on two opposite sides of the middle cover;

the first release comprises a magnetic flux release, and the second release comprises a shunt release or an undervoltage release.

As a further technical scheme, the alarm device further comprises a plurality of auxiliary contacts and a plurality of alarm contacts, and the plurality of auxiliary contacts and the plurality of alarm contacts are arranged on the middle cover.

As a further technical solution, the detection module includes a current transformer, and the housing further has a transformer base located at the back side of the face cover;

the mutual inductor base is provided with the mounting groove, current transformer set up in the mounting groove, just the louvre has been seted up on the lateral wall of mounting groove.

As a further technical scheme, the power supply device further comprises a heat dissipation device, wherein the heat dissipation device is arranged on the static contact, and/or the heat dissipation device is arranged on the conductive piece.

As a further technical scheme, a foolproof positioning hole matched with the foolproof positioning column on the installation back plate is formed in the back face of the shell.

Compared with the prior art, the utility model provides a pair of technical advantage that circuit breaker had does:

the utility model provides a circuit breaker, include: the device comprises a shell, a controller, a tripping component, an operating mechanism, a contact system, a detection module, a plug connection structure and a signal terminal; along the depth direction from the front surface to the back surface of the shell, the controller, the operating mechanism, the contact system, the detection module, the plug connection structure and the signal terminal are sequentially arranged, and the tripping component is arranged on the left side and/or the right side of the operating mechanism; the front side of the shell is provided with a face cover, the face cover is provided with a handle hole, and a handle of the operating mechanism extends out of the handle hole; the contact system comprises a moving contact and a fixed contact, the moving contact is connected with the conductive piece, and the conductive piece and the fixed contact are both conducted with the plug connection structure; the handle of the operating mechanism extends out of the handle hole, the operating mechanism is used for driving the moving contact to be connected with or disconnected from the static contact, and the tripping assembly is used for pushing the traction rod of the operating mechanism to rotate until the circuit breaker is tripped and powered off.

The controller, the operating mechanism, the contact system, the detection module, the plug connection structure and the signal terminal are sequentially arranged along the depth direction from the front side to the back side of the shell, the tripping assembly is arranged on the left side and/or the right side of the operating mechanism, the area of the front part of the circuit breaker is reduced to the greatest extent, and the effects of miniaturization, intellectualization, easiness in installation and convenience in maintenance are achieved.

Other features and advantages of the present invention will be described in detail in the detailed description which follows.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a cross-sectional view of an embodiment of a circuit breaker according to an embodiment of the present invention;

fig. 2 is a cross-sectional view of another embodiment of a circuit breaker according to an embodiment of the present invention;

fig. 3 is a schematic view of an embodiment of a cover according to the present invention;

fig. 4 is a schematic view of another embodiment of a face cover according to an embodiment of the present invention;

fig. 5 is a schematic front view of an upper cover according to an embodiment of the present invention;

fig. 6 is a schematic view of the back of the upper cover according to the embodiment of the present invention;

fig. 7 is a schematic view illustrating a main board disposed on an upper cover according to an embodiment of the present invention;

fig. 8 is a schematic view of another motherboard disposed on the upper cover according to an embodiment of the present invention;

fig. 9 is a schematic view of the surface cover mounted to the upper cover according to the embodiment of the present invention;

fig. 10 is a schematic view of a connecting rod structure according to an embodiment of the present invention;

fig. 11 is a schematic view of the installation of the face cover, the upper cover and the middle cover according to the embodiment of the present invention;

fig. 12 is a schematic view of the push rod of the embodiment of the present invention mounted on the middle cap;

fig. 13 is an enlarged view of the baffle plate at a position a in fig. 12 according to an embodiment of the present invention;

fig. 14 is a schematic view of the handle according to the embodiment of the present invention mounted on the middle cap;

fig. 15 is a schematic view of the push rod and the connecting rod structure mounted on the middle cover according to the embodiment of the present invention;

fig. 16 is a schematic structural view of a rotating rod according to an embodiment of the present invention;

fig. 17 is a schematic view of the push rod provided in the embodiment of the present invention cooperating with the handle through a connecting rod structure;

fig. 18 is a schematic view illustrating a plug-in-place indicating structure provided by an embodiment of the present invention being mounted on a middle cover;

fig. 19 is a cross-sectional view of a plug-in-place indication structure according to an embodiment of the present invention;

fig. 20 is a schematic view illustrating the bottom button and the drawbar according to the embodiment of the present invention;

fig. 21 is a schematic structural view of a bottom button according to an embodiment of the present invention;

fig. 22 is a schematic view of the alarm contact according to the embodiment of the present invention mounted on the middle cover;

fig. 23 is a schematic view of the working principle of the alarm contact provided by the embodiment of the present invention;

fig. 24 is a schematic view illustrating the installation of the trip assembly onto the middle cover according to the embodiment of the present invention;

fig. 25 is a schematic structural view of a shunt release provided in an embodiment of the present invention;

fig. 26 is a schematic structural view of a magnetic flux release according to an embodiment of the present invention;

fig. 27 is a schematic view of the shunt release and the magnetic flux auxiliary alarm integrated structure provided by the embodiment of the present invention mounted on the middle cover;

fig. 28 is a schematic view of the magnetic flux auxiliary alarm integrated structure and the handle provided by the embodiment of the present invention;

fig. 29 is an internal schematic view of a magnetic flux auxiliary alarm integrated structure provided by the embodiment of the present invention;

fig. 30 is a schematic view of a base and contact system according to an embodiment of the present invention;

fig. 31 is a schematic diagram of a base and an arc extinguishing system provided by an embodiment of the present invention;

fig. 32 is a schematic view of an operating mechanism and a contact system provided by an embodiment of the present invention;

fig. 33 is a schematic structural view of a contact system provided in an embodiment of the present invention;

fig. 34 is a schematic structural diagram of an operating mechanism and a three-phase contact system according to an embodiment of the present invention;

fig. 35 is a schematic view of a traction rod structure provided in the embodiment of the present invention;

fig. 36 is a schematic view of the back-up protection device according to an embodiment of the present invention mounted on the back side of the base;

fig. 37 is a schematic structural diagram of a backup protection device according to an embodiment of the present invention;

fig. 38 is a schematic structural view of a current transformer and an adapter plate assembly according to an embodiment of the present invention;

fig. 39 is a schematic view illustrating an installation of an adapter plate assembly according to an embodiment of the present invention;

fig. 40 is a schematic structural view of a base of a transformer provided by an embodiment of the present invention;

fig. 41 is a schematic view of a back side of a transformer base provided in an embodiment of the present invention;

fig. 42 is a schematic front view of a plugging base according to an embodiment of the present invention;

fig. 43 is a schematic view of a back side of a plugging base according to an embodiment of the present invention;

fig. 44 is a schematic view illustrating a static contact according to an embodiment of the present invention inserted into a bridge contact;

fig. 45 is a schematic structural view of a bridge contact according to an embodiment of the present invention;

fig. 46 is a schematic structural view of a plugging base according to an embodiment of the present invention;

fig. 47 is a schematic view of the connector according to an embodiment of the present invention installed on a plug base;

fig. 48 is a front view of a connector mounted to a pluggable base provided by an embodiment of the present invention;

fig. 49 is a schematic view of the circuit breaker provided by the embodiment of the present invention having two fool-proof positioning holes on the back side;

fig. 50 is a schematic view illustrating that four fool-proof positioning holes are formed in the back side of the circuit breaker according to the embodiment of the present invention;

fig. 51 is a side view of a circuit breaker according to an embodiment of the present invention;

fig. 52 is a schematic view of a baffle structure provided in an embodiment of the present invention;

fig. 53 is a schematic view illustrating the heat dissipation device according to an embodiment of the present invention being mounted on a stationary contact;

fig. 54 is an assembly view of a static contact and a heat sink provided in accordance with an embodiment of the present invention;

fig. 55 is a connection diagram of the heat dissipation device provided by the embodiment of the present invention and a static contact through a threaded hole;

fig. 56 is a front view of the heat sink mounted to the static contact according to the embodiment of the present invention;

fig. 57 is a schematic view of the back side of the face cover when the transparent window is mounted on the face cover from the back side of the face cover according to the embodiment of the present invention;

fig. 58 is a schematic view of a transparent window mounted on a face cover from the front side of the face cover according to an embodiment of the present invention;

fig. 59 is a schematic view of a knob indicator installation provided by an embodiment of the present invention;

fig. 60 is a schematic view of a connecting rod mounted on a fixing member via a first shaft according to an embodiment of the present invention;

fig. 61 is a schematic diagram of a protective cover structure according to an embodiment of the present invention.

Icon: 1-an operating mechanism; 2-moving contact; 3, static contact; 4-bridge type contacts; 5-soft coupling; 6-a conductive rod; 7-a connecting row; 8-a contact system; 9-an arc extinguishing system; 10-a conductive plate; 11-face cover; 12-nameplate; 13-cover turning; 14-a transparent window; 15-a transparent cover; 16-TEST button; 17-an upper cover; 18-a card board; 19-a restraint; 20-a fixing member; 21-a main board; 22-a connecting rod; 23-a transfer port; 24-hanging hooks; 25-seventh projections; 26-middle cover; 27-a push rod; 28-a fourth return spring; 29-a baffle; 30-a handle; 31-a link structure; 32-bottom button; 33-translation indicator; 34-a first return spring; 35-a third return spring; 36-a drawbar; 37-rotating rod; 38-a drive rod; 39-a stem portion; 40-a cap; 41-alarm contact; 42-alarm stand; 43-alarm push rod; 44-a fifth return spring; 45-alarm lever; 46-a first release; 47-a second trip; 48-avoiding position opening; 49-shunt release; 50-a magnetic flux release; 51-magnetic flux auxiliary alarm integrated structure; 52-a reset lever; 53-auxiliary contacts; 54-a base; 55-a sliding plate; 56-a first projection; 57-a second projection; 58-a third projection; 59-a fourth bump; 60-backup protection; 61-a fixed support; 62-an armature; 63-a magnetic yoke; 64-a current transformer; 65-transformer adapter plate; 66-a circuit board; 67-signal terminal adapter plate; 68-first FPC board; 69-a second FPC board; 70-a connector; 71-welding points; 72-a transformer base; 73-installing grooves of flame-out grids; 74-vent hole; 75-copper bar inlet at inlet end; 76-interphase insulation opposite insertion structure; 77-voltage sampling wiring groove; 78-mounting groove; 79-heat dissipation holes; 80-profiling positioning holes; 81-insulating separator; 82-FPC wiring groove; 83-slot; 84-a plug-in base; 85-interphase insulation blocking; 86-outlet bus bar interface; 87-a wire inlet busbar interface; 88-an insulating mounting plate; 89-a housing; 90-a housing; 91-phase spacer; 92-fool-proof positioning holes; 93-a heat sink; 94-a threaded hole; 95-perforation; 96-cell cover; 97-rotating the indicator; 98-rotating rod; 99-positioning plate; 100-a first axis; 101-a fifth projection; 102-protective cover plate.

Detailed Description

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

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations 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 orientation, be constructed and operated in a specific orientation, 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," "connected," and "connected" are to be construed 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.

In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

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

The specific structure is shown in fig. 1 to 61.

The embodiment provides a circuit breaker, including: the device comprises a shell, a controller, a tripping assembly, an operating mechanism 1, a contact system 8, a detection module, a plug connection structure and a signal terminal; the controller, the operating mechanism 1, the contact system 8, the detection module, the plug connection structure and the signal terminal are sequentially arranged along the depth direction from the front side to the back side of the shell, and the tripping assembly is arranged on the left side and/or the right side of the operating mechanism 1; the front surface of the shell is provided with a surface cover 11, the surface cover 11 is provided with a handle hole, and a handle 30 of the operating mechanism 1 extends out of the handle hole; the contact system 8 comprises a moving contact 2 and a static contact 3, the moving contact 2 is connected with the conductive piece, and the conductive piece and the static contact 3 are both conducted with the plug-in connection structure; the operating mechanism 1 is used for driving the moving contact 2 to be connected with or disconnected from the static contact 3, and the tripping component is used for pushing the traction rod 36 of the operating mechanism 1 to rotate until the circuit breaker is tripped and powered off.

The controller, the operating mechanism 1, the contact system 8, the detection module, the plug connection structure and the signal terminal are sequentially arranged along the depth direction from the front side to the back side of the shell, the tripping assembly is arranged on the left side and/or the right side of the operating mechanism 1, the area of the front part of the circuit breaker is reduced to the greatest extent, and the effects of miniaturization, intellectualization, easy installation and convenient maintenance are achieved.

In this embodiment, the nameplate 12 of the controller is pasted on the upper portion of the front surface of the face cover 11, laser printing nameplates are arranged on the left portion and the right portion of the front surface of the face cover 11, and the user can use the nameplate conveniently, a handle hole is formed in the front surface of the face cover 11 and located in the lower portion of the nameplate 12 of the controller, notches are formed in the side walls of the left side and the right side of the face cover 11, flip covers 13 are arranged in the notches, the two flip covers 13 are located in the left side and the right side of the handle hole respectively, and the two flip covers 13 are used for closing or opening movable grooves provided with drawing devices, so that the user can use the nameplate conveniently. The front of face lid 11 has the hole that convenience of customers surveyd circuit breaker inserted state, and transparent window 14 is installed to trompil department, and transparent window 14 is located the positive right side below of face lid 11, makes face lid 11 structure pleasing to the eye, and convenience of customers surveys inside the circuit breaker.

In the embodiment, as shown in fig. 57, in the face cover 11 with such a structure, the transparent window 14 is mounted on the face cover 11 from the back side of the face cover, one side of the transparent window 14 is provided with a hole to be matched with the positioning shaft on the face cover 11 for positioning, the other side is provided with a screw fixing hole, and the transparent window 14 is fixed on the face cover 11 through a fixing screw. As shown in fig. 58, when the transparent window 14 is mounted on the face cover 11 from the front side, the transparent window 14 has a hook, and the opening of the face cover 11 has a slot, so that the transparent window 14 is pressed into the opening to realize the matching.

The circuit breaker can be provided with a transparent cover 15 on the front surface of a face cover 11, the transparent cover 15 is positioned on the front surface of a nameplate 12 of a controller, the nameplate 12 of the controller can be protected, the nameplate 12 of the controller is prevented from being damaged, the transparent cover 15 is installed on the face cover 11 through the shaft hole in a matched mode, sixth protrusions are arranged on two sides of the upper end of the transparent cover 15, a first shaft hole is formed in the face cover 11, the transparent cover 15 is installed on the face cover 11 in a rotating mode through the cooperation of the sixth protrusions and the first shaft hole, and meanwhile the transparent cover 15 is prevented from falling off in normal use; the front of the face cover 11 can be provided with a battery cover 96, the battery cover 96 is located on the back of the nameplate 12 of the controller, the battery cover 96 is matched with a second shaft hole in the face cover 11 to be rotatably connected, a limiting protrusion is arranged on the outer edge of the battery cover 96 to prevent the battery cover 96 from falling off, the battery cover 96 is used for replacing the battery when the battery of the circuit breaker mainboard 21 is not electrified, the nameplate 12 of the controller is only required to be torn down when the battery is replaced, the battery cover 96 is opened, the battery can be replaced, the battery replacement safety is enhanced without detaching the face cover 11, and the convenience for replacing the battery can be improved.

In this embodiment, the circuit breaker further includes a controller, a pulling device, a clamping plate 18, a limiting member 19 and an indicating member, wherein the indicating member may be a translation indicating member 33 or a rotation indicating member 97, the housing has an upper cover 17 located on the back side of the face cover 11, the controller includes a main board 21, the face cover 11 is connected to the upper cover 17 through fastening screws, the pulling device is installed on the left and right sides of the upper cover 17, and is used for being matched with the outside when the plug-in circuit breaker is replaced, so that the circuit breaker can be easily pulled out. The drawing device comprises a first shaft 100, a fixing member 20 and a connecting rod 22 for being matched and connected with the outside, movable grooves are formed in the left side and the right side of the upper cover 17, the fixing member 20 is pressed on the first shaft 100, the fixing member 20 is fastened on the upper cover 17 through screws, the first shaft 100 is rotatably connected to the back side of the upper cover 17 through the fixing member 20, a transfer hole 23 is formed in one end of the connecting rod 22, the connecting rod 22 is rotatably connected to the first shaft 100 through the transfer hole 23, and the connecting rod 22 can rotate around the first shaft 100 in the movable grooves. Connecting rod 22 still is provided with the couple 24 that is used for being connected with outside cooperation and is used for couple 24 to roll out the seventh arch 25 of movable groove, drive connecting rod 22 through seventh arch 25 and rotate, and stretch out the movable groove with connecting rod 22, couple 24 stretches out the movable groove promptly, and is convenient for use, be provided with mutually supporting recess and bump between flip 13 upper and lower both ends and the breach that corresponds, make flip 13 rotate to be connected in the breach, when needs use draw-off gear, flip 13 on the face lid 11 is turned up, catch on the seventh arch 25 on the connecting rod 22 with instrument or hand, alright in order to easily take out connecting rod 22, couple 24 stretches out outside the circuit breaker, after the use, rotate the return with connecting rod 22, with flip 13 on the face lid 11 lid can.

The main board 21 is an MCU board and is arranged at the upper part of the front surface of the upper cover 17, or can be arranged at the upper part and the left and right sides of the front surface of the upper cover 17 and is fastened by screws, the main board 21 is rectangular or II-shaped, so that the space is saved, when the translation indicating piece 33 is arranged, as shown in fig. 18, the lower right part of the front surface of the upper cover 17 is provided with a rotary rod 98, the translation indicating piece 33 is arranged on a positioning plate 99, the rotary rod 98 drives the translation indicating piece 33 to move downwards on the positioning plate 99 by rotating, a first return spring 34 is arranged below the translation indicating piece 33, the translation indicating piece 33 is reset upwards by the first return spring 34, the structure is simple, and the display effect of the translation indicating piece 33 is good; when the rotation indicator 97 is provided, as shown in fig. 59, the rotation indicator 97 has a back end facing the back of the upper cover 17, and the left and right sides of the back end are rotatably connected to the upper cover 17 by the second shaft, and the rotation indicator 97 is rotationally reset by the first reset spring 34, wherein one end of the first reset spring 34 is connected to the rotation indicator 97, and the other end is connected to the upper cover 17, which is simple in structure.

The positive lower part of upper cover 17 is provided with cardboard 18 and restriction piece 19, cardboard 18 is installed on upper cover 17, the front of cardboard 18 sets up restriction piece 19, be used for spacing cardboard 18 on upper cover 17, wherein cardboard 18 is used for circuit breaker and external fixed connection, cardboard 18 is provided with the hook portion of catching on with upper cover 17 and is used for the pull-out of cardboard 18 from the circuit breaker is inside, be provided with the eighth arch on restriction piece 19, when cardboard 18 does not use, the eighth arch can be with cardboard 18 restriction inside the circuit breaker, can not drop, and when cardboard 18 pulls out, there is certain frictional force, can not loosen and take off, face lid 11 corresponds cardboard 18 department and is provided with the chamfer, make things convenient for cardboard 18 to take out.

In this embodiment, the circuit breaker further includes a trip assembly, a TEST button 16, a circuit board 66, a bottom button 32, a push rod 27, a fourth return spring 28, an alarm contact 41, an alarm bracket 42, an alarm push rod 43, and an alarm rod 45. The shell is provided with a middle cover 26 positioned at the back side of the face cover 11, the tripping assembly comprises a first tripper 46 and a second tripper 47, and the first tripper 46 and the second tripper 47 are respectively positioned at the left side and the right side of the front face of the middle cover 26; the first tripper 46 and the second tripper 47 are respectively installed in two installation cavities on the front surface of the middle cover 26, the middle cover 26 is connected to the back side of the upper cover 17, a limiting pressing table for pressing the first tripper 46 and the second tripper 47 is arranged on the back surface of the upper cover 17, a buckle is arranged on the first tripper 46 and is connected to the middle cover 26 through the buckle, and the first tripper 46 and the second tripper 47 are prevented from being separated and displaced when the circuit breaker is in on-off operation or the tripping assembly acts. The middle cover 26 is provided with a clearance opening 48 for the first release 46 to strike the draw bar 36 and the second release 47 to draw the draw bar 36. Wherein the first release 46 comprises a flux release 50 and the second release 47 comprises a shunt release 49 or an undervoltage release. The circuit board 66 of this embodiment is used for signal switching, and the MCU board has one or more rows of pins, and is matched with corresponding row of pins.

The TEST button 16 is installed at the lower left corner of the front face of the middle cover 26, a second return spring is installed on the TEST button 16, one end of the TEST button 16 penetrates through the upper cover 17 and the face cover 11, the other end of the TEST button is matched with the draw bar 36 on the back side of the middle cover 26, the circuit breaker can be tripped by pressing the TEST button 16 from the outside of the face cover 11, and safety and simple structure are improved.

The circuit board 66 is fixed on the left side of the front face of the middle cover 26 through screws, row nuts are welded on the circuit board 66 and can be plugged with row pins on the main board 21 to be used for transmitting signals, the second release 47 is installed on the left side of the front face of the middle cover 26, the first release 46 is installed on the right side of the front face of the middle cover 26, and three groups of micro switches are installed on the first release 46 to serve as the auxiliary contacts 53. A set of auxiliary contacts 53 are connected to the main board 21 by wires and terminals to provide the main board 21 with status signals at the corresponding auxiliary contacts 53. The remaining two sets of auxiliary contacts 53 are connected from the right side to the bottom of the left side circuit board 66 by wires and terminals, and the circuit board 66 transmits two sets of status signals to the signal terminals on the back side of the circuit breaker through the flexible board, and transmits the circuit breaker status signals to the external desired signal positions through the terminals externally mated with the signal terminals.

The alarm device comprises two alarm contacts 41, which are all mounted on an alarm support 42, the alarm support 42 is erected on the right side of a mounting cavity provided with a second release 47, a fifth reset spring 44 is arranged on the alarm support 42, the fifth reset spring 44 is located between the two alarm contacts 41, an alarm push rod 43 is arranged in the mounting cavity, one end of the alarm push rod is abutted against the fifth reset spring 44, the other end of the alarm push rod extends out of the bottom of the mounting cavity and is matched with the alarm rod 45, the alarm rod 45 is mounted on a trip buckle central shaft of the circuit breaker, the alarm rod 45 rotates along with the closing and opening of the circuit breaker, the alarm push rod 43 is pushed to move towards the fifth reset spring 44 and drives a spring piece of the alarm contact 41 to realize alarm signal indication, the alarm contact 41 is inserted on a circuit board 66 through a lead and a terminal, one path of alarm signals is transmitted to a main board 21 through the circuit board 66, a circuit breaker state is provided for the main board 21, and the other path of alarm signals is transmitted to a signal terminal on the back of the circuit breaker through the circuit board 66 and a flexible board, so as to provide a circuit breaker state for the outside. The alarm signal can also be used for transmitting two groups of alarm signals generated by the two alarm contacts 41 to the signal terminals, the number of the alarm signals transmitted to the signal terminals can be changed into one group or two groups according to requirements, but when the number of the alarm signals is two, the alarm signals cannot be provided for the main board 21.

The embodiment is not limited to this, and five sets of micro switches may be installed on the magnetic flux release 50, and the five sets of micro switches and the magnetic flux release 50 are an integrated structure, that is, the magnetic flux auxiliary alarm integrated structure 51, three sets of which are auxiliary contacts 53 and two sets of which are alarm contacts 41. One of the three sets of auxiliary contacts 53 is connected to the main board 21 by wires and terminals to provide the main board 21 with status signals corresponding to the auxiliary contacts 53. The other two sets of auxiliary contacts 53 and the two sets of alarm contacts 41 are connected to the left side circuit board 66 from the right side through wires and terminals, one set of alarm signals are transmitted to the main board 21 through the circuit board 66, the other set of alarm signals and the two sets of auxiliary signals transmit signals to signal terminals on the back of the circuit breaker through the circuit board 66 and the flexible board, and then the circuit breaker alarm signals and the auxiliary signals are transmitted to external required signal positions through terminals matched with the signal terminals externally. The alarm signals can also be transmitted to the signal terminals in two groups, and the number of the alarm signals transmitted to the signal terminals can be changed into one or two groups according to requirements, but when the number of the alarm signals is two, the alarm signals cannot be provided for the main board 21. It should be noted that this arrangement may be used without the alarm bracket 42. Meanwhile, a magnetic flux release 50 in the magnetic flux auxiliary alarm integrated structure 51 drives a reset rod 52 to carry out release reset through the handle 30.

The bottom button 32 is arranged on the lower side surface of the middle cover 26, the third reset spring 35 is arranged on the bottom button 32, the bottom button 32 is matched with the traction rod 36, when the breaker is inserted into or pulled out of a cabinet or inserted into a frame, the bottom button 32 is matched with the cabinet or inserted into the frame, the bottom button 32 is pressed into the breaker and pushes the traction rod 36 to rotate, the breaker is tripped, the breaker is guaranteed to be in a power-off state when the breaker is inserted into or pulled out of the cabinet or inserted into the frame, and personal safety of an operator is guaranteed. When the circuit breaker is inserted into the position or completely pulled out, the bottom button 32 is ejected out of the circuit breaker by the third return spring 35, the draw bar 36 is reset, and the circuit breaker can be normally operated to be closed and opened. The bottom button 32 is matched with the indicator arranged on the upper cover 17, when the bottom button 32 is pressed into the breaker, the indicator is pushed to move, so that the state of the breaker can be seen at the transparent window 14 on the face cover 11, the indicator is in an unconnected state, namely, the indicator is not inserted in place, after the indicator is inserted in place, when the bottom button 32 is reset under the action of the third reset spring 35, the indicator drives the indicator to reset under the action of the first reset spring 34, and the indicator indicates a connected state. Namely, the bottom button 32, the indicator, the first return spring 34 and the third return spring 35 form a plug-in-place indicating structure.

The bottom button 32 is T-shaped, and has a rod part 39 and a cap part 40, the rod part 39 is provided with a third reset spring 35, the part of the cap part 40 on one side of the rod part 39 is matched with the traction rod 36, the circuit breaker is guaranteed to be tripped, the part on the other side of the rod part 39 is matched with the indicating part, the indicating part is guaranteed to move and an indicating function is achieved, wherein the specific structural form of the bottom button 32 can be adjusted according to requirements, and the requirement can be met.

The push rod 27 is installed on the upper side surface of the middle cover 26, and the fourth return spring 28 is arranged on the push rod 27, wherein the push rod 27 and the handle 30 inside the middle cover 26 can be mutually linked, when the handle 30 is switched on, the push rod 27 is pushed to extend out of the upper side surface of the middle cover 26, the push rod 27 is matched with an external cabinet or an insertion frame, and at this time, the circuit breaker cannot be pulled out of the cabinet or the insertion frame. When the circuit breaker is opened or tripped, the handle 30 is separated from the push rod, and the push rod 27 is reset under the action of the fourth reset spring 28, so that the structure is simple, and the safety is ensured. Further, catch bar 27 communicates with handle 30 each other through link structure 31, link structure 31 includes bull stick 37 and actuating lever 38, the one end of bull stick 37 is rotated and is connected in catch bar 27, the other end is rotated and is connected in well lid 26, actuating lever 38 is connected in bull stick 37, handle 30 drives actuating lever 38 motion, make actuating lever 38 drive catch bar 27 motion through bull stick 37 and stretch out the last side of well lid 26, wherein the bull stick 37 is provided with two, catch bar 27 cooperates with actuating lever 38 through two bull sticks 37 towards the both sides of handle 30 one end, actuating lever 38 cooperates with handle 30, realize above-mentioned function.

The upper cover 17 and the middle cover 26 are provided with openings corresponding to the matching handles 30, and the middle cover 26 is internally provided with a sliding plate 55 corresponding to the openings. Along the direction of the switch-on and switch-off movement of the handle 30, when the handle 30 is in switch-on, a gap is formed between the handle 30 and the opening of the middle cover 26, and similarly, when the handle 30 is in switch-off, a gap is also formed between the handle 30 and the opening of the middle cover 26, during the switch-off and switch-on processes of the handle 30, the sliding plate 55 can slide in the middle cover 26 along with the movement of the handle 30, and the gap between the handle 30 and the opening of the middle cover 26 can be shielded during the movement, so that the risk of flashover or electrification of the operating mechanism 1 existing during the power-on of the circuit breaker is avoided.

In this embodiment, the circuit breaker further includes an arc extinguishing system 9, a contact system 8, an operating mechanism 1, and a backup protection device 60. The housing has a base 54 on the back side of the front cover 11, in particular, the base 54 is connected to the back side of the middle cover 26, and the contact system 8 is mounted on the operating mechanism 1 and, after the mounting, is mounted together in the base 54 and is fastened by screws through the base 54.

An arc extinguishing chamber for installing the arc extinguishing system 9 is arranged at the upper part of the front surface of the base 54, and three arc extinguishing systems 9 are arranged on the base 54 to provide arc extinguishing for the three-phase contact system 8. The base 54 is provided with alternate ribs, and three arc extinguishing chambers which are independent of each other are formed through the alternate ribs, so that alternate insulation when a product is cut off is guaranteed. The lower part of the front surface of the base 54 is provided with three mutually independent A-phase through holes, B-phase through holes and C-phase through holes, conductors for three phases penetrate through the base 54 to play a role in three-phase insulation, and backup protection devices 60 for pushing the draw bar 36 to rotate to the circuit breaker to trip and power off are arranged at the positions of the B-phase through holes and the C-phase through holes. The backup protection device 60 is mainly used for large-current short-circuit breaking of the circuit breaker, a support groove corresponding to a B-phase through hole and a support groove corresponding to a C-phase through hole are formed in the base 54, the backup protection device 60 comprises a fixing support 61 and a protector fixed on the fixing support 61, the fixing support 61 is fixed in the support groove, fixing is convenient, and meanwhile, after the backup protection device 60 is installed in the support groove, the backup protection device covers the support groove through the protection cover plate 102 to play a role in protection. The protector comprises an armature 62 and a magnetic yoke 63 which are matched with each other, the movable contact 2 is connected to the conductive piece through a soft coupling 5 or a hard conductor, a region with an opening facing to the front surface is formed between the armature 62 and the magnetic yoke 63 in a surrounding mode, and the soft coupling 5 or the hard conductor penetrates through the region along the depth direction of the shell.

In this embodiment, the casing has a transformer base 72 located on the back side of the face cover 11, specifically, the transformer base 72 is connected to the back side of the base 54, a conductive member, a fixed contact 3, a flame-out grid installation groove 73, an exhaust hole 74, an inlet line end copper bar inlet 75, an interphase insulation plug structure 76, an insulation partition 81, and a voltage sampling wiring groove 77 are arranged on the transformer base 72, and the operating mechanism 1 is configured to drive the moving contact 2 to conduct the fixed contact 3 and the conductive member; preferably, electrically conductive piece includes conducting rod 6 and hookup row 7, and conducting rod 6 and hookup row 7 are all installed on mutual-inductor base 72, and conducting rod 6 connects in hookup row 7, and hookup row 7 connects in plug connection structure, and conducting rod 6 switches on through hookup row 7 and plug connection structure realization, simple structure, and it is convenient to set up.

The transformer base 72 is provided with a mounting groove 78, the detection module comprises a current transformer 64 arranged in the mounting groove 78, and a heat dissipation hole 79 is formed in the side wall of the mounting groove 78. Specifically, three mounting grooves 78 are provided, and heat dissipation holes 79 are formed in the side walls of the mounting grooves 78 on the two sides, so that the heat dissipation effect is improved; the bottom of the mounting groove 78 is provided with a profiling positioning hole 80 matched with the conducting rod 6, and the conducting rod 6 is inserted into the profiling positioning hole 80.

In this embodiment, the circuit breaker further includes a heat dissipation device 93, where the heat dissipation device 93 is disposed on the stationary contact 3, and/or the heat dissipation device 93 is disposed on the conductive member. Specifically, mounting holes are formed in the conducting rod 6 and the connecting bar 7, the connecting bar 7 is fixed to the conducting rod 6 by penetrating through the mounting holes through screws, when the heat dissipation device 93 is arranged, the mounting holes are formed in the connecting bar 7, the heat dissipation device 93 is fixed to the mounting holes through screws, and the heat dissipation device 93 and the connecting bar 7 are fixed. Simple structure, it is fixed convenient and stable. But not limited thereto, the heat sink 93 may also be arranged on the stationary contact 3 and/or on the conducting rod 6. Preferably, the heat dissipation device 93 includes a heat dissipation grid, the static contact 3 is provided with a threaded hole 94, a through hole 95 is formed in the heat dissipation grid, and a screw passes through the through hole 95 and is fixed to the threaded hole 94, so that the heat dissipation grid is fixedly connected with the static contact 3.

The current transformer 64 is arranged in an installation groove 78 of the transformer base 72 and is fixedly arranged with the transformer base 72 through two self-tapping screws; the two ends of the soft connection 5 are respectively welded with the conducting rod 6 and the moving contact 2 into a whole, the conducting rod 6 penetrates through the current transformer 64 and is positioned through a profiling positioning hole 80 on the transformer base 72, the conducting rod 6 and the connecting row 7 are both provided with screw holes, the connecting row is inserted into the slot 83 of the transformer base 72, is aligned with the screw holes on the conducting rod 6 and is fixedly installed with the conducting rod 6 through screws. The mutual inductor base 72 is an inner cavity structure, the front lower part is a current mutual inductor 64 and a moving contact 2 wire outlet end mounting structure, and the front upper part is a static contact 3 wire inlet end mounting structure. The current transformer 64 is provided with a transformer adapter plate 65, the transformer adapter plate 65 transmits signals to the main board 21 and the signal terminals through an adapter plate assembly, the adapter plate assembly comprises a circuit board 66, a signal terminal adapter plate 67, a first FPC board 68, a second FPC board 69 and voltage sampling lines, the signal terminals comprise connectors 70 used for being connected with the outside, and the transformer adapter plate 65, the adapter plate assembly and the connectors 70 are welded into a whole through hot pressing. The voltage sampling line is welded on a welding point 71 of the transformer adapter plate 65, penetrates through a voltage sampling wiring groove 77 of the transformer base 72, and is connected to a screw hole of the connecting bar 7 along an external wiring groove, and a tail end metal sheet of the voltage sampling line is fixedly arranged on the connecting bar 7 through screws. The voltage acquisition point is arranged on the connecting row 7 of the outlet end, the acquired voltage data is transmitted to the transformer adapter plate 65 through a voltage sampling line, the data is integrated and processed through the transformer adapter plate 65, the transformer adapter plate 65 is connected with the circuit board 66 through the second FPC board 69, the circuit board 66 is connected with the main board 21 through the connecting row, the data is transmitted to the main board 21 and can be displayed on a liquid crystal display, the main board 21 is connected with the connector 70 through the first FPC board 68, and intelligent interaction can be carried out through the butt joint of the connector 70 and external equipment in use.

In this embodiment, the housing has a plug base 84 located on the back side of the face cover 11, specifically, the plug base 84 is connected to the back side of the transformer base 72, and the plug connection structure is disposed on the plug base 84, so that the installation is convenient and the structure is stable, and the plug connection structure includes the first bridge-type contact 4 and the second bridge-type contact 4; the static contact 3 is inserted into an opening at one end of the first bridge-type contact 4, or the static contact 3 is connected to the conductive plate 10, and the conductive plate 10 is inserted into an opening at one end of the first bridge-type contact 4; the conductive element is inserted into an opening at one end of the second bridge contact 4, or the conductive element comprises a conductive rod 6 and a connecting row 7, the movable contact 2 is connected to the conductive rod 6 through a flexible joint 5, the conductive rod 6 is connected to the connecting row 7, and the connecting row 7 is inserted into an opening at one end of the second bridge contact 4. The plug-in connection structure can also be a chuck in other forms, such as a plum blossom contact and the like. The plug mount 84 is used for mounting the bridge contact 4, connecting the interposer, mounting the temperature sampling line, and the connector 70. The internal adapter plate and the external inserted busbar are connected to form a loop, the function of sampling the temperature of the busbar is completed, and an internal and external data connection interface is provided.

The bridge-type contacts 4 are fixedly mounted with the plugging base 84 through screws, one ends of the two bridge-type contacts 4 for forming a loop are respectively connected with the static contact 3 and the connecting bar 7, and the other ends are used as external socket interfaces; the plug base 84 is connected with a shell 89 through a screw to serve as a mounting structure of the connector 70; an insulating mounting plate 88 and a connector 70 are arranged on the plugging base 84, a groove-shaped structure of the insulating mounting plate 88 is clamped on an interphase insulating barrier 85 of the plugging base 84, a hook-shaped structure of the insulating mounting plate 88 is clamped on the shell 89 to limit the shell 89, the insulating mounting plate 88 is fixedly mounted with the plugging base 84 through a self-tapping screw, and the front part of the insulating mounting plate 88 provides a temperature sampling line mounting and wiring structure and strengthens interphase insulation; the temperature sampling line sampling end is installed on the insulating installation plate 88 and fixedly installed through a clamping groove, the signal end is installed on a plug of the signal terminal adapter plate 67 and is wired in a wire groove of the insulating installation plate 88 for externally inserting a bus bar for temperature data acquisition; the connector 70 is integrated with the signal terminal adapter plate 67, and is mounted on the housing 89 by self-tapping screws for data exchange with an external device. The plugging base 84 is of a three-phase six-cavity structure, the lower side of the front face is provided with an outlet busbar interface 86, and the upper side is provided with an inlet busbar interface 87.

In this embodiment, the circuit breaker includes phase partition 91, and the shell has the housing 90 that is located the dorsal side of face lid 11, specifically, and housing 90 is connected in the dorsal side of plug base 84 for seal the dorsal side of circuit breaker, housing 90 is provided with phase partition 91 mounting structure and plug guide structure. The phase partition board 91 is used for providing insulation for the plug connection structure and providing phase insulation for the externally inserted busbar. Specifically, the partition plate 91 and the housing 90 are installed together through a snap-fit groove structure. The side wall of the circuit breaker is provided with an FPC wiring groove 82, and a baffle 29 is arranged on the FPC wiring groove 82 and used for covering the FPC wiring groove 82 and protecting an FPC board. The baffle 29 is assembled by a snap-fit structure to cooperate with a pair of slots on the middle cover 26, the base 54, the transformer base 72 and the plug base 84, wherein a pair of pins are inserted into the housing 90. In order to prevent the installation error between circuit breaker and the installation backplate, fool-proof positioning hole 92 has been seted up on housing 90, be provided with on the installation backplate and prevent the fool-proof reference column, as shown in fig. 49, set up in the diagonal angle department of housing 90 of the circuit breaker of a model and prevent fool-proof positioning hole 92, as shown in fig. 50, set up in the four corners department of housing 90 of the circuit breaker of another model and prevent fool-proof positioning hole 92, set up four on the installation backplate this moment and prevent the fool-proof reference column, prevent that fool-proof positioning hole 92 can prevent these two circuit breakers from installing the confusion this moment, guarantee the correct use of circuit breaker, avoid the potential safety hazard.

In this embodiment, the traction rod 36 of the operating mechanism 1 has a first protrusion 56 cooperating with the magnetic flux release 50, and when the tripping assembly receives a tripping instruction, the tripping assembly triggers the traction rod 36 to trip; the draw bar 36 is also provided with a third bulge 58 matched with the TEST button 16 and a fifth bulge 101 matched with the bottom button 32, so that the circuit breaker can be tripped during TEST TEST, the circuit breaker is not installed in place or the circuit breaker is tripped in the process of pulling out the switch cabinet, the draw bar 36 is also provided with a fourth bulge 59 matched with the backup protection device 60, so that the armature 62 of the backup protection device 60 strikes the draw bar 36 to trip the circuit breaker in the case of short circuit; the traction bar 36 is also provided with a second bulge 57 matched with the shunt release 49, and under the condition that a remote tripping instruction is issued to the shunt release 49, the shunt release 49 strikes the traction bar 36 to trip the circuit breaker; the lever of the operating mechanism 1 is provided with a structure that a magnetic flux/shunt excitation reset shaft is fixedly arranged, and the lever drives the reset shaft to transfer reset force and stroke to reset the release in the brake separating process. The contact system 8 has the following functions that a contact shaft is arranged on a moving contact 2 of the contact system 8, the contact shaft is contacted with a pressure plate, a contact spring applies force to the pressure plate, and the pressure is transmitted to the moving contact 2 through the pressure plate and the contact shaft; when the large current is cut off, the moving contact 2 is opened by electric repulsion, when the moving contact 2 drives the contact 2 shaft to rotate to a certain angle, the direction of the force crosses the rotating center of the moving contact 2, so that the moving contact 2 cannot fall down, and the cut-off arc extinguishing effect is improved; the state transition of the auxiliary switch can be triggered by the cooperation of the rotary shaft of the contact system 8 and the auxiliary switch.

The conductive loop of the circuit breaker comprises a bridge-type contact 4, a fixed contact 3, a movable contact 2 and a soft connection, and forms an inverted U-shaped structure, wherein the soft connection can also be changed into a hard connection, and a conductive loop formed by a plurality of sections of conductors has a good realization effect; the static contact 3 comprises a static contact plate and a static contact, the static contact plate can be a flat plate type U-shaped, and the static contact at least comprises one contact; the moving contact 2 comprises a moving contact plate and a moving contact, the moving contact plate at least comprises a moving contact plate, and the moving contact at least comprises a contact; the connection from the soft coupling or the hard coupling to the conductive rod 6 may be a direct connection, or may be a through connection via at least one conductive plate 10, and the connection from the stationary contact 3 to the bridge contact 4 may be a direct connection via a stationary contact plate, or may be a through connection via at least one conductive plate 10. The conductive plate 10 may be rectangular or circular or shaped.

In this embodiment, the circuit breaker uses bridge type contact 4 to carry out the outside and inserts female being connected of arranging with the moving/static contact 3 of circuit breaker, bridge type contact 4 adopts the multicontact structure, make its contact effect better, use the spring preforming to carry out the pre-compaction simultaneously, make bridge type contact 4 and female contact connection who arranges provide sufficient pressure, bridge type contact 4's contact front end provides the guide angle of certain angle simultaneously, but the guide angle that also has certain angle on the contact support makes things convenient for the female row of outside to insert time automatic correction. The floating hole design is arranged on the contact support, so that the bridge-type contact 4 can conveniently perform self-adaptive adjustment on the inserted busbar. The circuit breaker is connected with the outside in an inserting way, besides the inserting connection of a conductive loop, the circuit breaker also comprises the input and output connection of a plug-in terminal, the plug-in terminal can have shunt excitation or undervoltage control voltage, the signal output of auxiliary alarm and the input and output of other signals, and the plug-in terminal is connected with auxiliary, alarm, shunt excitation, undervoltage and other sampling terminals inside the circuit breaker.

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; although the present invention has been described in detail with reference to the foregoing embodiments, it should 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 (10)

1. A circuit breaker, comprising: the device comprises a shell, a controller, a tripping component, an operating mechanism (1), a contact system (8), a detection module, a plug connection structure and a signal terminal;

along the depth direction from the front surface to the back surface of the shell, the controller, the operating mechanism (1), the contact system (8), the detection module, the plug connection structure and the signal terminal are sequentially arranged, and the tripping component is arranged on the left side and/or the right side of the operating mechanism (1);

the front surface of the shell is provided with a surface cover (11), the surface cover (11) is provided with a handle hole, and a handle (30) of the operating mechanism (1) extends out of the handle hole;

the contact system (8) comprises a moving contact (2) and a fixed contact (3), the moving contact (2) is connected with a conductive piece, and the conductive piece and the fixed contact (3) are both conducted with the plug-in connection structure;

the operating mechanism (1) is used for driving the moving contact (2) and the static contact (3) to be connected or disconnected, and the tripping assembly is used for pushing a traction rod (36) of the operating mechanism (1) to rotate to the circuit breaker to trip and power off.

2. The circuit breaker according to claim 1, characterized in that it further comprises a drawing device comprising a first shaft (100), a fixed member (20) and a link (22) for cooperating with the outside, said housing further having an upper cover (17) on the back side of said face cover (11);

the upper cover (17) is provided with a movable groove, the first shaft (100) is fixedly connected into the movable groove through the fixing piece (20), one end of the connecting rod (22) is provided with an installation hole, and the connecting rod (22) is rotatably connected to the first shaft (100) through the installation hole;

the connecting rod (22) is also provided with a hook (24) which is used for being matched and connected with the outside and a seventh bulge (25) which is used for enabling the hook (24) to rotate out of the movable groove.

3. The circuit breaker according to claim 1, further comprising a backup protection device (60) for pushing the draw bar (36) to rotate to trip and power off the circuit breaker, wherein the housing further comprises a base (54) located on the back side of the face cover (11), the base (54) is provided with an a-phase through hole, a B-phase through hole and a C-phase through hole, and the backup protection device (60) is arranged at least one of the a-direction through hole, the B-phase through hole and the C-phase through hole;

the backup protection device (60) comprises an armature (62) and a magnetic yoke (63) which are matched with each other, the movable contact (2) is connected to the conductive piece through a flexible joint (5), a region with an opening facing the front is formed between the armature (62) and the magnetic yoke (63) in a surrounding mode, and the flexible joint (5) penetrates through the region along the depth direction of the shell.

4. The circuit breaker according to claim 1, characterized in that said plug connection comprises a first bridge contact (4) and a second bridge contact (4);

the static contact (3) is inserted into an opening at one end of the first bridge-type contact (4), or the static contact (3) is connected to a conductive plate (10), and the conductive plate (10) is inserted into an opening at one end of the first bridge-type contact (4);

the conductive piece is inserted into an opening at one end of the second bridge-type contact (4), or the conductive piece comprises a conductive rod (6) and a connecting bar (7), the movable contact (2) is connected to the conductive rod (6) through a flexible joint (5), the conductive rod (6) is connected to the connecting bar (7), and the connecting bar (7) is inserted into an opening at one end of the second bridge-type contact (4).

5. The circuit breaker of claim 1 wherein said housing further has a center cover (26) positioned on a back side of said face cover (11), said trip assembly including a first trip unit (46) disposed on said center cover (26) and/or a second trip unit (47) disposed on said center cover (26).

6. The circuit breaker according to claim 5, wherein said middle cover (26) is provided with said first release (46) and said second release (47), and said first release (46) and said second release (47) are respectively located on opposite sides of said middle cover (26);

the first trip (46) comprises a magnetic flux trip (50) and the second trip (47) comprises a shunt trip (49) or an under-voltage trip.

7. The circuit breaker according to claim 5, further comprising a plurality of auxiliary contacts (53) and a plurality of alarm contacts (41), and wherein the plurality of auxiliary contacts (53) and the plurality of alarm contacts (41) are each provided on the middle cover (26).

8. The circuit breaker according to claim 1, characterized in that said detection module comprises a current transformer (64), said casing further having a transformer base (72) located on the back side of said face cover (11);

the current transformer is characterized in that a mounting groove (78) is formed in the transformer base (72), the current transformer (64) is arranged in the mounting groove (78), and a heat dissipation hole (79) is formed in the side wall of the mounting groove (78).

9. The circuit breaker according to claim 1, further comprising a heat sink (93), wherein the heat sink (93) is disposed on the stationary contact (3) and/or the heat sink (93) is disposed on the conductive member.

10. The circuit breaker of claim 1, wherein the back of the housing is provided with a fool-proof positioning hole (92) for matching with the fool-proof positioning post on the mounting backboard.

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