CN212934513U

CN212934513U - Circuit breaker and power distribution system

Info

Publication number: CN212934513U
Application number: CN202020657063.5U
Authority: CN
Inventors: 闫广超; 杨娜; 赵小苇; 刘鑫
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2020-04-26
Filing date: 2020-04-26
Publication date: 2021-04-09
Anticipated expiration: 2030-04-26

Abstract

The embodiment of the application provides a circuit breaker and a power distribution system, which relates to the technical field of electrical equipment, the circuit breaker comprises a shell, a moving contact and a fixed contact which are positioned in the shell, a first metal bus plate and a second metal bus plate, a first wire inlet end and a second wire inlet end are arranged on the shell, a first wire outlet end and a second wire outlet end, a first switching end and a second switching end are arranged on the shell, the first switching end is used for being electrically connected with a first switching end of another circuit breaker through a first switching metal sheet, the second switching end is used for being connected with a second switching end of another circuit breaker through a second switching metal sheet, the first wire inlet end is electrically connected with the first metal bus plate, the first switching end is connected with a local output terminal positioned in the shell, and the second wire inlet end, the second switching end and the fixed contact are electrically connected with the second.

Description

Circuit breaker and power distribution system

Technical Field

The application relates to the technical field of electrical equipment, in particular to a circuit breaker and a power distribution system.

Background

The circuit breaker can effectively improve the safety and the reliable operation of electrical equipment. When the existing circuit breaker is used, referring to fig. 1, a power supply of a power distribution network is electrically connected with an input end of a connector 01, and is divided into multiple paths through the connector 01, multiple paths of output ends of the connector 01 are electrically connected with an incoming line terminal of a corresponding circuit breaker 02 through a switching copper bar 04, an outgoing line terminal of the circuit breaker 02 is electrically connected with a corresponding load 03, so that power is supplied to each load 03, and the safety of the load 03 is guaranteed through the circuit breaker 02.

In the distribution unit of network rack, connector and circuit breaker all install the position department that is close to the top at network rack usually, and the space of installation is less, for the less installation space of rational utilization, become the structural design of switching copper bar 04 various, cause certain degree of difficulty for the assembly of switching copper bar like this.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides a circuit breaker and power distribution system, and the main objective provides the technical scheme that need not to design the switching copper bar of various structures in order to connect connector and circuit breaker.

In order to achieve the above purpose, the embodiment of the present application adopts the following technical solutions:

in a first aspect, the application provides a circuit breaker, which includes a housing, a moving contact and a static contact located in the housing, a first metal bus board and a second metal bus board, where the housing is provided with a first incoming line end and a second incoming line end, a first outgoing line end and a second outgoing line end, and a first transfer end and a second transfer end, the first transfer end is used to be electrically connected with a first transfer end of another circuit breaker through a first transfer metal sheet, the second transfer end is used to be electrically connected with a second transfer end of another circuit breaker through a second transfer metal sheet, the first incoming line end, the first transfer end and a local output terminal located in the housing are electrically connected with the first metal bus board, and the second incoming line end, the second transfer end and the static contact are electrically connected with the second metal bus board.

In the circuit breaker provided by the application, the circuit breaker is electrically connected with a first incoming line end, a first switching end and a local output terminal positioned in a shell through a first metal bus plate, a second incoming line end, a second switching end and a static contact are electrically connected through a second metal bus plate to form a 1P + N (N is a straight-through) circuit breaker, and the circuit breaker is also provided with the first switching end and the second switching end, the first switching end can be directly and electrically connected with the first switching end on another circuit breaker (called as a second circuit breaker) through a first switching metal sheet, and the second switching end can be directly and electrically connected with the second switching end on the second circuit breaker through a second switching metal sheet to shunt current to the second circuit breaker, so that a shunting function is realized. With the distribution unit among the prior art and connector electricity connection, the switching copper bar that the rethread structure is different is connected with each circuit breaker to realize shunting and compare, the circuit breaker that this application embodiment provided does not firstly need the connector to realize shunting, secondly does not need to be used for connecting connector and each circuit breaker and the switching copper bar that the structure is different, but adopts first switching sheetmetal and second switching sheetmetal to connect per two circuit breakers, has just realized shunting.

In a possible implementation manner of the first aspect, the housing has a first side surface and a second side surface which are adjacent to each other, a first incoming line end and a second incoming line end, the first change-over end and the second change-over end are both arranged on the first side surface, and the first outgoing line end and the second outgoing line end are arranged on the second side surface. Because the first wire inlet end and the second wire inlet end are arranged on the first side surface, the first wire outlet end and the second wire outlet end are arranged on the second side surface adjacent to the first side surface, when the circuit breaker is installed inside a power distribution unit in a network cabinet during specific use, the power distribution unit is close to the top of the network cabinet, the first wire inlet lead and the second wire inlet lead extend into the top of the network cabinet and are directly and electrically connected with the first wire inlet end and the second wire inlet end on the first side surface (forming an upper wire inlet), the connecting lead of a load is directly and electrically connected with the first wire outlet end and the second wire outlet end on the second side surface (forming a front wire outlet), compared with the existing upper wire inlet (the first wire inlet end and the second wire inlet end are arranged on the upper surface of the shell) and lower wire outlet (the first wire outlet end and the second wire outlet end are arranged on the lower surface of the shell), the size in the height direction of the power distribution unit in the network cabinet can be reduced, compare current back inlet wire (first inlet wire end and second inlet wire end are located the side surface of casing) and back outlet wire (first outlet wire end and second outlet wire end also are located the side surface of casing), can avoid the inlet wire of being connected with the distribution unit to appear bending in order to occupy more installation space's phenomenon when the wiring, so, the circuit breaker that this application embodiment provided can reduce installation space.

In a possible implementation manner of the first aspect, the first wire inlet end and the second wire inlet end are located at a first end portion of the first side surface, the first transition end and the second transition end are located at a second end portion of the first side surface, and the first end portion is opposite to the second end portion.

In a possible implementation manner of the first aspect, the circuit breaker further includes: a first locking member and/or a second locking member; the first locking piece is used for fastening the first switching metal sheet on the first switching end and can fasten the first incoming line lead on the first incoming line end; the second locking piece is used for fastening the second switching metal sheet on the second switching end and can fasten the second inlet wire lead on the second inlet wire end. Can be with first switching sheetmetal and with the fastening of first inlet wire through setting up first retaining member, the second retaining member can be with second switching sheetmetal and with the fastening of second inlet wire to improve the installation effectiveness.

In a possible implementation manner of the first aspect, the first locking member includes: the first end of the first metal bus plate is the end of the first metal bus plate inserted into the first conversion end; the first metal pressing plate is arranged at a position close to the first end of the first screw rod, the first metal pressing plate and the first screw rod are relatively fixed, and the first metal pressing plate is positioned between the first end of the first metal bus plate and the first end of the first screw rod; first metal wiring frame sets up the position department near the second end of first screw rod, be formed with the cavity in the first metal wiring frame, the second end of first metal cylinder manifold stretches into to the cavity in, so that the cavity forms first cavity and second cavity, the second end of first screw rod passes first metal wiring frame and stretches into to first cavity, and first metal wiring frame and first screw rod screw-thread fit, the second cavity can supply first inlet wire to insert, the second end of first metal cylinder manifold is the one end in the first inlet wire end of the insertion of first metal cylinder manifold. When the first end of the first screw rod is rotated, the first screw rod can drive the first metal pressing plate to move so as to compress the first switching metal sheet inserted into the first switching end, and can also drive the first metal wiring frame to move so as to compress the first inlet wire inserted into the first inlet wire end, namely, the first switching metal sheet and the first inlet wire are fixed by rotating the first screw rod.

In a possible implementation manner of the first aspect, the second locking member and the first locking member have the same structure.

In a possible implementation manner of the first aspect, the method further includes: the first locking elastic piece is arranged close to the first metal wiring frame and can apply elastic force to the first metal wiring frame towards the first end of the first screw rod, so that a distance for inserting the first transfer metal sheet is formed between the first metal pressing plate and the first end. Because the first screw rod is in clearance fit with the through hole on the first end of the first metal bus plate, the first screw rod, the first metal wiring frame and the first metal pressing plate have freedom degree along the extending direction of the first screw rod, when the first transfer metal sheet is inserted, the first metal pressing plate possibly blocks the first transfer end, and the first transfer metal sheet cannot be smoothly inserted into the first transfer end.

In a possible implementation manner of the first aspect, the first locking elastic piece is disposed in the first cavity, one end of the first locking elastic piece is connected to the second end of the first metal bus plate, and the other end of the first locking elastic piece is connected to the first metal wiring frame.

In a possible implementation manner of the first aspect, the first locking elastic piece is disposed outside the first metal wire frame, one end of the first locking elastic piece is fixed to the housing, and the other end of the first locking elastic piece is connected to the first metal wire frame.

In a possible implementation manner of the first aspect, the first screw rod further includes a first insulating shielding plate, the first insulating shielding plate is connected to the first metal pressing plate, and when the first screw rod moves along the extending direction of the first screw rod, the first metal pressing plate and the first insulating shielding plate can be driven to move synchronously so that the first insulating shielding plate moves and shields the opening of the first transition end. When not inserting first switching sheetmetal, first insulating shielding plate can shelter from first switching end, improves this circuit breaker's security performance.

In a possible implementation manner of the first aspect, the first metal bus plate includes: the vertical plate is connected to the middle of the horizontal plate, a first extending portion and a second extending portion are arranged at two ends of the horizontal plate and extend towards the direction far away from the vertical plate, the first extending portion extends into the first transfer end, the second extending portion extends into the first wire inlet end, and the end portion, far away from the horizontal plate, of the vertical plate is electrically connected with the local output terminal. The first wire inlet end and the second wire inlet end, as well as the first switching end and the second switching end are arranged on the first side surface, and the first wire outlet end and the second wire outlet end are arranged on the second side surface, so that the metal bus plate is designed into the structure, and the structure is simple on the premise of realizing current circulation.

In a possible implementation manner of the first aspect, the first extension and the second extension are both formed with an embossing structure. The embossing structure is formed on the first extension part and the second extension part, so that the reliability of the electric connection of the first extension part and the first transfer metal sheet is improved, the reliability of the electric connection of the second extension part and the first incoming line lead is improved, and the contact resistance of a contact surface is reduced.

In a possible implementation manner of the first aspect, the metal bus plate further includes: and one end of the heat dissipation plate is connected with the transverse plate or the vertical plate. Through setting up the heating panel, can improve the radiating effect of this metal cylinder manifold.

In a possible implementation manner of the first aspect, the transverse plate and the vertical plate are connected through a welding structure to obtain the first metal bus plate.

In a possible implementation manner of the first aspect, the transverse plate and the vertical plate are integrally formed to obtain the first metal bus plate. And the integrally formed metal bus plate is adopted, so that the number of connection points is reduced, and the impedance is reduced.

In a possible implementation manner of the first aspect, the method further includes: the buckle can move between an extending position and a retracting position along a first direction relative to the shell, is positioned outside the shell and used for being clamped with the power distribution unit when the buckle is positioned at the extending position, and is positioned inside the shell to be separated from the power distribution unit when the buckle is positioned at the retracting position; the traction piece can move along a second direction relative to the shell, the second direction is perpendicular to the first direction, the traction piece is provided with a first end portion and a second end portion which are opposite, the first end portion is located in the shell, the second end portion is located outside the shell, when the buckle is located at the extending position, the first end portion is abutted to the buckle, and when the buckle is located at the retracting position, the first end portion is separated from the buckle; the first elastic piece can apply elastic force to the traction piece, so that the first end part is abutted against the buckle to apply thrust towards the outside of the shell to the buckle; the second elastic piece can exert elasticity to the buckle, and under the circumstances that the tractive spare, first end breaks away from the buckle, the second elastic piece can make the buckle resume to the extended position by the position of withdrawing.

First elastic component is under the pulling force of tractive spare, so that the tractive spare exerts thrust to the buckle, the buckle is in the extended position, the buckle just can realize the joint with the distribution unit promptly, when the outside pulling of casing is drawn the spare towards, the thrust of tractive spare to the buckle disappears, the buckle will move to withdrawing the position, under the effect of second elastic component, can make the buckle resume to extended position by withdrawing the position, so that carry out next joint, so, the circuit breaker that this application embodiment provided can realize joint formula plug with the distribution unit, compare the fixed mode of connecting pieces such as adoption bolt, easy dismounting, especially, the convenience is changed at the scene, maintain the circuit breaker.

In a possible implementation manner of the first aspect, the buckle includes a first buckle and a second buckle, the first buckle and the second buckle are oppositely arranged on two sides of the pulling part, and one end of the first buckle located in the housing and one end of the second buckle located in the housing are connected through a second elastic part. The first buckle and the second buckle which are arranged relatively are adopted, so that the circuit breaker can be clamped with the power distribution unit more firmly.

In a possible implementation manner of the first aspect, a slide way for moving the buckle is provided in the housing, and an extending direction of the slide way is parallel to the first direction.

In a possible implementation manner of the first aspect, the device further comprises a limiting structure, wherein the limiting structure is used for preventing the first end of the pulling piece from sliding to the outside of the shell; limit structure includes: the extending direction of the limiting groove is parallel to the second direction; one end of the limiting pin is positioned in the limiting groove, one of the limiting groove and the limiting pin is arranged on the traction piece, and the other is arranged on the shell. Through the limit structure who sets up this structure, can inject the displacement of tractive spare to when preventing to pull the tractive spare, pull out the first end of tractive spare from the casing, this limit structure's simple structure, it is also convenient to implement.

In a possible implementation manner of the first aspect, a jack is formed in the casing and used for being connected to a clamping plate of the power distribution unit in an inserting mode, a third elastic piece is arranged in the jack, and the clamping plate can be clamped in the jack due to elastic deformation of the third elastic piece. Through set up the jack on the casing to and set up the third elastic component in the jack, realize pegging graft of circuit breaker and distribution unit, just so can further improve the joint strength of circuit breaker and distribution unit.

In a possible implementation manner of the first aspect, the circuit breaker further comprises a guiding structure, and the guiding structure is used for guiding the circuit breaker to move along the second direction so as to be inserted into the power distribution unit. Adopt guide structure guarantee circuit breaker steady smooth and easy inside of inserting the distribution unit.

In a second aspect, the present application provides a power distribution system comprising: the circuit breaker in distribution unit and a plurality of above-mentioned first aspect or any implementation of first aspect to and first switching sheetmetal and second switching sheetmetal, a plurality of circuit breakers set up in the distribution unit, and a plurality of circuit breakers lay side by side, the distribution unit is connected with first inlet wire end electricity through first inlet wire, and be connected with second inlet wire end electricity through second inlet wire, the first switching end of two adjacent circuit breakers is connected to first switching sheetmetal electricity, the second switching end of two adjacent circuit breakers is connected to second switching sheetmetal electricity.

In the power distribution system provided by the application, because the circuit breaker adopts the circuit breaker in any one of the above-mentioned first aspect, because the circuit breaker not only has a first incoming line end and a second incoming line end, a first outgoing line end and a second outgoing line end, but also has a first transfer end and a second transfer end, the first transfer ends of every two adjacent circuit breakers are electrically connected through a first transfer metal sheet, and the second transfer ends of every two adjacent circuit breakers are electrically connected through a second transfer metal sheet, thus the current shunting is realized through the first transfer metal sheet and the second transfer metal sheet, thus a connector with the shunting function is not needed to be connected outside the circuit breaker, and the structure of the whole power distribution system is simplified.

In a possible implementation manner of the first aspect, the circuit breaker includes: adjacent first and second circuit breakers; the first transfer metal sheet and the second transfer metal sheet respectively comprise a plate-shaped metal sheet, and a first metal inserting plate and a second metal inserting plate which are arranged on the plate-shaped metal sheet; a first metal flashboard of the first transfer metal sheet is inserted into a first transfer end of the first circuit breaker, and a second metal flashboard of the first transfer metal sheet is inserted into a first transfer end of the second circuit breaker; the first metal flashboard of the second switching metal sheet is inserted into the second switching end of the first circuit breaker, and the second metal flashboard of the second switching metal sheet is inserted into the second switching end of the second circuit breaker.

Drawings

FIG. 1 is a schematic diagram of a prior art connection of a connector, a circuit breaker and a load;

fig. 2 is a schematic structural diagram of an external shape of a circuit breaker according to an embodiment of the present disclosure;

fig. 3 is a schematic internal structural diagram of a circuit breaker according to an embodiment of the present disclosure;

fig. 4 is a schematic internal structural diagram of a circuit breaker according to an embodiment of the present application;

fig. 5 is a schematic internal structural diagram of a circuit breaker according to an embodiment of the present application;

fig. 6 is a schematic structural diagram of a first metal bus plate according to an embodiment of the present disclosure;

fig. 7 is a schematic connection relationship diagram of a first screw, a first metal wire frame, a first metal bus plate and a first metal pressing plate according to an embodiment of the present application;

FIG. 8 is another perspective view of FIG. 7;

fig. 9 is a schematic internal structural diagram of a circuit breaker according to an embodiment of the present application;

FIG. 10 is a schematic view of the connection between the buckle, the pulling member and the first elastic member according to the embodiment of the present application;

fig. 11 is a schematic structural diagram of a safety door provided in an embodiment of the present application;

fig. 12 is a schematic structural diagram of a power distribution system provided in an embodiment of the present application;

FIG. 13 is another perspective view of FIG. 12;

fig. 14 is a schematic structural diagram of the first transition metal sheet or the second transition metal sheet according to an embodiment of the present application.

Reference numerals:

01-a connector; 02-circuit breaker; 03-load; 04-switching copper bars; 1-a circuit breaker; a 1-first side; a2 — second side; 101-a housing; 102-a first incoming line end; 103-a second incoming line end; 104-a first transfer end; 105-a second transition end; 106-a first outlet terminal; 107-second outlet terminal; 1081-a first metal platen; 1082 — a first insulating shutter; 109-a first screw; 110-a first metal wire frame; 1101 — a first cavity; 1102 — a second cavity; 111-a first metal bus plate; 1111-a first end; 1112-a second end; 1113-third end; 1114-a heat sink; 112-a pull; 1131 — first snap; 1132 — a second clasp; 114-a spacing pin; 115-a limiting groove; 116-a first resilient member; 117-a second elastic member; 118-a jack; 119-a third elastic member; 120-a first locking spring; 121-a second metal bus plate; 1211-first end; 1212-a second end; 1213-third end; 1221-a second metal platen; 1222-a second insulating shutter; 123-a second screw; 124-a second metal wire frame; 2-a power distribution unit; 21-cardboard; 31-a first transition metal sheet; 32-a second transition metal sheet; 41-a first incoming wire; 42-second incoming wire, 5-button; 6, safety doors; 61-a transverse plate; 62-a riser; 7-an elastic member; 8-a linkage mechanism; 9-moving contact; 10-static contact; 11-arc extinguishing grid pieces; 12-an arc barrier plate; 13-a button cap; 14-a release; 151-sheet metal; 152-a first metal insert plate; 153-second metal insert plate.

Detailed Description

The embodiments of the present application relate to a circuit breaker and a power distribution system, which are described in detail below with reference to the accompanying drawings.

On one hand, an embodiment of the present application provides a circuit breaker, referring to fig. 2, fig. 3, fig. 4, and fig. 5, the circuit breaker includes a housing 101, a button 5 disposed on the housing 101 and rotationally connected to the housing 101, and a link mechanism 8, a movable contact 9, a fixed contact 10, and a release 14 disposed in the housing 101, where a support arm of the button 5 is connected to the movable contact 9 through the link mechanism 8, the button 5 can control the movable contact 9 and the fixed contact 10 to switch between an open state and a closed state through the link mechanism 8, the release 14 is connected to the movable contact 9, and the release 14 is used to control the movable contact 9 and the fixed contact 10 to switch from the closed state to the open state when a current value in a circuit of the circuit breaker is greater than a current value threshold.

When this circuit breaker is switched into the separating brake state by the combined floodgate state, the circuit breaker is by having electric current through switching over suddenly to the transition in-process that no electric current passes through, can produce electric arc between moving contact 9 and the static contact 10, in order to avoid the danger that electric arc caused, as shown in fig. 3, the position department that corresponds moving contact 9 in the casing installs arc extinguishing bars piece 11, the position department that corresponds arc extinguishing bars piece 11 on the casing is provided with the gas vent, the position department that corresponds arc extinguishing bars piece 11 and moving contact 9 in the casing installs electric arc barrier plate 12.

The arc-extinguishing grid 11 can divide the arc into a plurality of small arcs, and the near-cathode effect of the alternating-current arc is utilized to reduce the abnormal current by increasing the voltage of the arc, so that the arc-extinguishing effect is achieved.

Because the electric arc is the spark in the twinkling of an eye that the air that breaks down between moving contact 9 and the static contact 10 because of voltage produced, in time discharge circuit breaker, correspondingly, the position department that corresponds arc extinguishing bars piece 11 on the casing is provided with the gas vent, and like this, high temperature gas can be discharged from the circuit breaker through the gas vent to avoid the danger that high temperature high pressure gas brought.

An arc barrier plate 12 is arranged in the position of the shell corresponding to the arc extinguishing grid plate 11 and the moving contact 9. Thus, the arc splashed on the arc barrier 12 may be reflected to the arc chute 11 through the arc barrier 12. The arc can be prevented from splashing to other positions in the shell through the arc blocking plate 12, a protection effect is formed on components in the shell, and the service life of the circuit breaker can be prolonged.

Referring to fig. 2, the housing 101 is provided with a first incoming line end 102 and a second incoming line end 103, a first outgoing line end 106 and a second outgoing line end 107, a first transfer terminal 104 and a second transfer terminal 105, the first transfer terminal 104 is used for being electrically connected with the first transfer terminal 104 of another circuit breaker 1 through a first transfer metal sheet, and the second transfer terminal 105 is used for being electrically connected with the second transfer terminal 105 of another circuit breaker 1 through a second transfer metal sheet.

Referring to fig. 4 and 5, a first metal bus plate 111 (shown in fig. 5) and a second metal bus plate 121 (shown in fig. 4) are disposed in the housing 101, the first metal bus plate 111 electrically connects the first incoming line terminal 102, the first transfer terminal 104 and the local output terminal located in the housing, and the second metal bus plate 121 electrically connects the second incoming line terminal 103, the second transfer terminal 105 and the static contact 10. This forms a 1P + N (N pole through) breaker.

Since the housing 101 is further provided with the first transfer end 104 and the second transfer end 105, referring to fig. 12 and 13, when in specific use, the first transfer end 104 can be electrically connected with the first transfer end 104 of another circuit breaker 1 through the first transfer metal sheet 31, and the second transfer end 105 can be electrically connected with the second transfer end 105 of another circuit breaker 1 through the second transfer metal sheet 32, so that current shunting is realized. That is to say, just can shunt electric current to another circuit breaker from a circuit breaker through first switching sheetmetal and second switching sheetmetal, compare like the structure shown in fig. 1, need not set up the connector, also need not set up the different switching copper bar of structure yet.

In an example, a first switching metal sheet and a second switching metal sheet are used for connecting a first circuit breaker and a second circuit breaker, a power distribution unit is connected with the first circuit breaker through a first incoming line lead and a second incoming line lead, the first circuit breaker is connected with a first load, the second circuit breaker is connected with a second load, when a moving contact and a static contact of the first circuit breaker are in a switching-on state and a moving contact and a static contact of the second circuit breaker are in a switching-on state, the power distribution unit supplies power to the first circuit breaker through the first incoming line lead and the second incoming line lead and further supplies power to the corresponding first load, and meanwhile, current is shunted to the second circuit breaker through the first switching metal sheet and the second switching metal sheet so as to supply power to the second load.

The positions of the first wire inlet end 102 and the second wire inlet end 103, the first wire outlet end 106 and the second wire outlet end 107, and the first switching end 104 and the second switching end 105 on the shell 101 have various conditions.

In use, referring to fig. 12 and 13, the circuit breaker 1 is inserted inside the power distribution unit 2, power is supplied to the circuit breaker through the power distribution unit 2, and the power distribution unit 2 is generally installed at a position close to the top of a network cabinet, and the installation space is also small.

In order to reduce the installation space as much as possible, referring to fig. 2, the housing 101 has a first side surface a1 and a second side surface a2 adjacent to each other, a first wire inlet end 102 and a second wire inlet end 103, a first switching end 104 and a second switching end 105 both opening on the first side surface a1, a first wire outlet end 106 and a second wire outlet end 107 on the second side surface a2, the first wire inlet end 102 and the second wire inlet end 103 on a first end portion of the first side surface, the first switching end 104 and the second switching end 105 on a second end portion of the first side surface, the first end portion being opposite to the second end portion. That is to say, the first wire inlet end 102 and the second wire inlet end 103, and the first wire outlet end 106 and the second wire outlet end 107 are opened on two adjacent side surfaces, so that the technical effect generated by the design is as follows: if the circuit breaker with the structure provided by the embodiment of the application is installed in a power distribution unit, the first side face A1 faces the top direction of a network cabinet, the first incoming line lead and the second incoming line lead can be directly and electrically connected with the outgoing line terminal of the power distribution unit above the first side face A1, the formed incoming line mode can be called as an upper incoming line, the first incoming line lead and the second incoming line lead do not need to be bent, and compared with a connection mode of bending the first incoming line lead and the second incoming line lead, the space occupied by the first incoming line lead and the second incoming line lead is reduced; in addition, the first outlet end 106 and the second outlet end 107 are located on the second side face a2, i.e. towards the direction of the load, so that the load is electrically connected with the circuit breaker directly by using the connecting wire, the outlet mode formed in this way can be called front outlet, and the circuit breaker and the power distribution unit do not occupy a large space along the height direction of the cabinet body.

Of course, in particular embodiments, it is also possible to mount the power distribution unit 2 near the bottom of the network cabinet, such that the first side a1 is oriented toward the bottom of the network cabinet.

In addition, referring to fig. 2, the first transfer terminal 104 and the second transfer terminal 105 are also opened on the first side surface a1, and when in use, referring to fig. 12 and 13, the plurality of circuit breakers 1 are arranged side by side, the first transfer terminal 104 on one circuit breaker can be electrically connected with the first transfer terminal 104 of another circuit breaker 1 by directly using the first transfer metal sheet 31, the second transfer terminal 105 on one circuit breaker 1 can be electrically connected with the second transfer terminal 105 of another circuit breaker 1 by using the second transfer metal sheet 32, the first transfer metal sheet and the second transfer metal sheet can be designed into a flat plate structure, the structure is simple, bending is not needed, and the occupied space is small.

In some embodiments, referring to fig. 6, the first metal bus plate 111 has a first end 1111, a second end 1112 and a third end 1113 connected, the first end 1111 is located in the first transition end 104 for electrically connecting with a first transition metal sheet inserted into the first transition end 104, the second end 1112 is located in the first wire inlet end 102 for electrically connecting with a first wire inlet lead inserted into the first wire inlet end 102, and the third end 1113 is electrically connected with a local output terminal disposed in the housing 101.

The structure of the first metal bus plate 111 has various realizable situations, for example, referring to fig. 6, the metal bus plate 111 includes a horizontal plate and a vertical plate, the vertical plate is connected to the middle of the horizontal plate, the two ends of the horizontal plate have a first extension portion and a second extension portion, the first extension portion and the second extension portion both extend towards the direction far away from the vertical plate, the first extension portion forms a first end and extends into the first transition end, the second extension portion forms a second end and extends into the first incoming end, and the end portion, far away from the horizontal plate, of the vertical plate forms a third end and is electrically connected with the local output terminal. Of course, the first metal bus plate 111 may be designed in other structures, and any structure of the first metal bus plate 111 is within the scope of the present application.

It should be noted that: the connection of the riser to the middle of the cross plate does not only mean that the riser is connected to the geometric center of the cross plate, but any position in the two ends of the cross plate can be called that the riser is connected to the middle of the cross plate.

In order to make the second extending portion located in the first wire inlet end and the first wire inlet lead have good electrical contact, and the first extending portion located in the first transfer end and the first transfer metal sheet have good electrical contact, referring to fig. 6, the first extending portion and the second extending portion both have the embossing structure.

When concrete implementation, diaphragm and riser can be connected through welded structure, and diaphragm and riser can integrated into one piece obtain first metal cylinder manifold. This application preferentially adopts integrated into one piece's first metal cylinder manifold because integrated into one piece's first metal cylinder manifold compares the first metal cylinder manifold that makes through welded structure, and the tie point is less, and the impedance also can reduce.

When the first metal bus plate 111 having the structure shown in fig. 6 is adopted, in order to improve the heat dissipation effect of the first metal bus plate 111, referring to fig. 6, the first metal bus plate 111 further includes a heat dissipation plate 1114, and the heat dissipation plate 1114 is designed to increase the heat dissipation area of the first metal bus plate 111 so as to improve the heat dissipation effect of the first metal bus plate. The heat sink 1114 may be disposed on the horizontal plate and connected to the horizontal plate, or may be disposed on the vertical plate and connected to the vertical plate. The installation position of the heat dissipation plate is not limited in the application, and any position is within the protection scope of the application.

In some embodiments, referring to fig. 4, the second metal bus plate 121 has a first end 1211, a second end 1212 and a third end 1213 connected to each other, the first end 1211 is located in the second adapting terminal 105 for electrically connecting to the second adapting metal sheet inserted into the second adapting terminal 105, the second end 1212 is located in the second wire inlet terminal 103 for electrically connecting to the second wire inlet lead inserted into the second wire inlet terminal 103, and the third end 1213 is electrically connected to the static contact 10.

The structure of the second metal bus plate 121 has various realizable situations, for example, referring to fig. 4, the second metal bus plate 121 includes a transverse plate and a vertical plate, the vertical plate is connected to the middle of the transverse plate, the transverse plate has a first extension portion and a second extension portion at two ends, the first extension portion and the second extension portion both extend toward a direction close to the vertical plate, the first extension portion forms a first end and extends into the second transfer end, the second extension portion forms a second end and extends into the second feed end, and the end portion of the vertical plate far away from the transverse plate forms a third end and is electrically connected with the fixed contact. Of course, the second metal bus plate 121 may be designed in other structures, and any structure of the second metal bus plate 121 is within the scope of the present application.

Since the first incoming line end 102 and the second incoming line end 103, and the first transfer terminal 104 and the second transfer terminal 105 are both opened on the first side surface a1, the first metal bus bar 111 is designed to have the structure shown in fig. 6, which is simple in structure and small in occupied space, and similarly, the second metal bus bar 121 is designed to have the structure shown in fig. 4, which is simple in structure and small in occupied space.

In specific implementation, the transverse plate and the vertical plate of the second metal bus bar shown in fig. 4 can be connected through a welding structure, and the transverse plate and the vertical plate can be integrally formed to obtain the second metal bus bar. This application preferentially adopts integrated into one piece's second metal cylinder manifold because integrated into one piece's second metal cylinder manifold compares the metal cylinder manifold that makes through welded structure, and the tie point is less, and the impedance also can reduce.

When the first transfer sheet metal 31 is inserted into the first transfer end 104 and needs to be fixed, the embodiment of the present application provides a first locking member for fastening the first transfer sheet metal, and referring to fig. 7 and 8, the first locking member includes: a first screw 109 and a first metal pressing plate 1081, a first end of two opposite ends of the first screw 109 is located outside the housing, and a second end of the first screw passes through a through hole (shown in fig. 6) on the first end 1111 of the first metal bus plate 111 and extends into the housing; the first metal pressing plate 1081 is disposed at a position close to the first end of the first screw 109, the first metal pressing plate 1081 is fixed to the first screw 109, and the first metal pressing plate 1081 is located between the first end 1111 of the first metal bus plate and the first end of the first screw 109.

After the first transfer metal sheet is inserted into the first transfer end, the first screw rod is rotated to drive the first metal pressing plate to move towards the direction close to the first end of the first metal bus plate relative to the first metal bus plate, so that the first transfer metal sheet is clamped between the first end of the first metal bus plate and the first metal pressing plate.

In addition, after the first incoming line conductor is inserted into the first incoming line terminal, the first incoming line conductor also needs to be fixed, an embodiment of the present application further provides a structure for fastening the first incoming line conductor, referring to fig. 7 and 8, the circuit breaker further includes a first metal wiring frame 110, the first metal wiring frame 110 is disposed at a position close to the second end of the first screw 109, a cavity is formed in the first metal wiring frame 110, the second end 1112 of the first metal bus plate extends into the cavity, so that the cavity forms a first cavity 1101 and a second cavity 1102, the second end of the first screw 109 extends into the first cavity 1101 through the first metal wiring frame, the first metal wiring frame 110 is in threaded fit with the first screw 109, and the second cavity 1102 can be inserted by the first incoming line conductor.

That is to say, when the first screw rod is rotated, the second end of the first screw rod 109 abuts against the second end 1112 of the first metal bus plate to prevent the first screw rod 109 from moving, and because the first screw rod is in threaded fit with the first metal wiring frame, when the first screw rod is continuously rotated, the first metal wiring frame is driven to move in a direction away from the first metal pressing plate, so as to clamp the first incoming wire in the second cavity.

Therefore, the structure for fastening the first transfer metal sheet and the first incoming line lead provided by the embodiment of the application realizes the fastening of the first transfer metal sheet and the first incoming line lead by rotating the same first screw rod, and has the advantages of simple structure and convenience in implementation.

In order to improve the safety performance of this circuit breaker, prevent that the foreign matter from inserting first transfer end, causing the potential safety hazard. Referring to fig. 7 and 8, the circuit breaker further includes a first insulating shielding plate 1082, the first insulating shielding plate 1082 is connected to the first metal pressing plate 1081, and when the first screw 109 moves along the extending direction thereof, the first metal pressing plate 1081 and the first insulating shielding plate 1082 can be driven to move synchronously, so that the first insulating shielding plate 1082 moves and shields the opening of the first transfer end.

If the first transfer metal sheet needs to be inserted, the first screw can be rotated to drive the first metal pressing plate to move so that the first insulating shielding plate 1082 is removed from the opening of the first transfer end, and the first transfer end is in an open state.

Because the first screw rod is in clearance fit with the through hole on the first end of the first metal bus plate, the first screw rod, the first metal wiring frame and the first metal pressing plate have freedom degrees along the extending direction of the screw rod, when the first transfer metal sheet is inserted, the first metal pressing plate possibly blocks the first transfer end, and the first transfer metal sheet cannot be smoothly inserted into the first transfer end.

In order to prevent the first metal pressing plate from blocking the first transfer end, referring to fig. 7 and 8, the circuit breaker further includes a first locking elastic member 120, the first locking elastic member 120 is disposed near the first metal wiring frame 110, the first locking elastic member 120 can apply an elastic force to the first metal wiring frame 110 toward the first end of the first screw, so that a distance D for inserting the first transfer metal sheet is provided between the first metal pressing plate and the first extension portion, and by disposing the first locking elastic member 120, the first screw, the first metal wiring frame and the first metal pressing plate can be prevented from moving along the extension direction of the screw, so that a fixed distance D is provided between the first metal pressing plate and the first extension portion, and smooth insertion of the first transfer metal sheet is effectively ensured.

The mounting position of the first locking elastic member 120 has various realizable manners, and for example, referring to fig. 7 and 8, the first locking elastic member 120 is disposed in the first cavity 1101, one end of the first locking elastic member 120 is connected with the second end 1112 of the first metal bus plate, and the other end is connected with the first metal wiring frame 110. As another example, the first locking elastic member 120 is disposed outside the first metal wire frame 110, and one end of the first locking elastic member 120 is fixed to the housing and the other end is connected to the first metal wire frame 110. Of course, the first locking elastic member 120 may be installed in other manners, and the manner of installing the first locking elastic member 120 is not limited herein.

The second locking member for fastening the second switching metal sheet 32 after it is inserted into the second switching end 105 is provided in this embodiment, wherein the first locking member and the second locking member may have the same or different structures, and for convenience of operation, it is preferable that the second locking member and the first locking member have the same structure, and the structure of the second locking member will be described in detail below.

Referring to fig. 4, the second locker includes: a second screw 123 and a second metal pressing plate 1221, wherein a first end of two opposite ends of the second screw 123 is located outside the housing, and a second end of the second screw passes through a through hole on the first end 1211 of the second metal bus plate 121 and extends into the housing; the second metal pressing plate 1221 is disposed at a position close to the first end of the second screw 123, the second metal pressing plate 1221 is fixed to the second screw 123, and the second metal pressing plate 1221 is located between the first end 1111 of the second metal bus plate and the first end of the second screw 123.

After the second switching metal sheet is inserted into the second switching end, the second screw rod is rotated to drive the second metal pressing plate to move towards the direction close to the first end of the second metal bus plate relative to the second metal bus plate, so that the second switching metal sheet is clamped between the first end of the second metal bus plate and the second metal pressing plate.

Referring to fig. 4, the circuit breaker further includes a second metal wire frame 124, the second metal wire frame 124 is disposed at a position close to the second end of the second screw 123, a cavity is formed in the second metal wire frame 124, the second end of the second metal bus plate extends into the cavity, so that the cavity forms a first cavity and a second cavity, the second end of the second screw 123 penetrates through the second metal wire frame and extends into the first cavity, the second metal wire frame 124 is in threaded fit with the second screw 123, and the second cavity can be used for inserting a second incoming wire.

That is to say, when the second screw rod is rotated, the second end of the second screw rod 123 abuts against the second end of the second metal bus plate to prevent the second screw rod 123 from moving, and because the second screw rod is in threaded fit with the second metal wiring frame, when the second screw rod is continuously rotated, the second metal wiring frame is driven to move in a direction away from the second metal pressing plate, so that the second incoming wire is clamped in the second cavity.

In order to improve the safety performance of this circuit breaker, prevent that the foreign matter from inserting the second and changeing the end, cause the potential safety hazard. Referring to fig. 4, the circuit breaker further includes a second insulating shielding plate 1222, and the second insulating shielding plate 1222 is connected to the second metal pressing plate 1221, and when the second screw 123 moves along the extending direction thereof, the second metal pressing plate 1221 and the second insulating shielding plate 1222 can be driven to move synchronously so that the second insulating shielding plate 1222 moves and shields the opening of the second transfer end.

If the second metal sheet is needed to be inserted, the second screw rod can be rotated to drive the second metal pressing plate to move, so that the second insulating shielding plate 1222 is moved away from the opening of the second transition end, and the second transition end is in an open state.

Because the second screw rod is in clearance fit with the through hole on the first end of the second metal bus plate, the second screw rod, the second metal wiring frame and the second metal pressing plate have freedom degrees along the extending direction of the screw rod, when the second switching metal sheet is inserted, the second metal pressing plate possibly blocks the second switching end, and the second switching metal sheet cannot be smoothly inserted into the second switching end.

In order to prevent the second metal pressing plate from blocking the second switching end, the circuit breaker further comprises a second locking elastic piece, the second locking elastic piece is arranged close to the second metal wiring frame 124, the second locking elastic piece can apply elastic force to the second metal wiring frame 124 towards the first end of the second screw rod, so that a space for the second switching metal sheet to be inserted is formed between the second metal pressing plate and the first extending portion, and through the arrangement of the second locking elastic piece, the second screw rod, the second metal wiring frame and the second metal pressing plate can be prevented from moving along the extending direction of the second screw rod, so that a fixed space is formed between the second metal pressing plate and the first extending portion, and smooth insertion of the second switching metal sheet is effectively guaranteed.

The mounting position of the second locking elastic piece has various realizable modes, and the second locking elastic piece is arranged in a first cavity of the second wiring frame, and one end of the second locking elastic piece is connected with the second end of the second metal bus plate, and the other end of the second locking elastic piece is connected with the second metal wiring frame. Further illustratively, the second locking elastic piece is arranged outside the second metal wiring frame, one end of the second locking elastic piece is fixed relative to the shell, and the other end of the second locking elastic piece is connected with the second metal wiring frame.

The connection structure of the circuit breaker 1 and the power distribution unit 2 has various cases, and the following explanation is made by two embodiments.

Example one

The circuit breaker 1 is fixed in the power distribution unit 2 by a fixed connection. For example, bolts, rivets or other fasteners are used.

Example two

The circuit breaker 1 is clamped in the power distribution unit 2 through a clamping structure.

Referring to fig. 9 and 10, the clamping structure includes: a buckle (1131 or 1132), a pull element 112 and a first elastic element 116 and a second elastic element 117, wherein the buckle is capable of moving relative to the housing along a first direction (such as the direction P1 shown in fig. 9) between an extended position and a retracted position, when the buckle is located at the extended position, the buckle is located outside the housing and is used for clamping with the power distribution unit, when the buckle is located at the retracted position, the buckle is located inside the housing and is separated from the power distribution unit, when the buckle is located at the retracted position, the pull element 112 is capable of moving relative to the housing along a second direction (such as the direction P2 shown in fig. 9), the second direction is perpendicular to the first direction, the pull element 112 has a first end and a second end which are opposite, the first end is located inside the housing, the second end is located outside the housing, when the buckle is located at the extended position, the first end is abutted against the buckle, when the buckle is located at the retracted position, the first end is separated from the buckle, the first end is abutted against the buckle to apply pushing force towards the outside of the shell to the buckle, the second elastic piece 117 can apply elastic force to the buckle, and under the condition that the first end is separated from the buckle by drawing the traction piece 112, the second elastic piece 117 can enable the buckle to be restored to the extending position from the retracting position.

The working principle of the clamping structure is as follows: in the initial state, the first elastic member 116 can apply an elastic force to the pulling member 112 toward the inside of the housing (e.g., F1 in fig. 9), so that the first end of the pulling member 112 abuts against the buckle and applies a pushing force to the buckle toward the outside of the housing (e.g., F2 in fig. 9), and the end of the buckle is located at the end of the housing and can be clamped with the power distribution unit. When the circuit breaker clamped with the power distribution unit needs to be moved out, the pulling piece 112 is pulled towards the direction outside the shell to destroy the elasticity of the first elastic piece 116 to the pulling piece 112, so that the end part of the pulling piece 112 is separated from the buckle, the pushing force to the buckle disappears, the buckle can be moved into the shell, and the circuit breaker is moved out of the power distribution unit. Under the effect of second elastic component, can make the buckle resume to the extended position from retrieving the position to carry out next joint.

The clamping connection mode of the second embodiment and the fixed connection mode of the first embodiment achieve the following technical effects: when being connected with the power distribution unit, the circuit breaker is convenient to install, can be plugged and replaced on site in parallel, and can be plugged and unplugged without dismantling other structural components.

The first elastic member 116 and the second elastic member 117 shown in fig. 9 and 10 may be extension springs, torsion springs, or other elastic members.

As shown in fig. 9 and 10, a mounting hole is formed on the pulling member 112, the first elastic member 116 is disposed in the mounting hole, one end of the first elastic member 116 is connected to the pulling member 112, and the other end is fixed to the housing.

In order to facilitate the pulling of the pulling member towards the outside of the housing, the portion of the pulling member 112 located outside the housing may be designed into a ring structure for easy operation.

In order to improve the connection strength between the circuit breaker and the power distribution unit, referring to fig. 9 and 10, the latch includes a first latch 1131 and a second latch 1132, the first latch 1131 and the second latch 1132 are oppositely disposed on two sides of the pulling member 112, and one end of the first latch 1131 located in the housing and one end of the second latch 1132 located in the housing are connected by a second elastic member 117. First buckle and second buckle through laying relatively compare a buckle and connect with the distribution unit joint, can corresponding improvement circuit breaker and distribution unit's joint strength. The present application does not limit the structure of the first clip 1131 and the second clip 1132.

In order to further improve the connection strength between the circuit breaker and the power distribution unit, referring to fig. 9, the housing 101 is provided with an insertion hole 118, the insertion hole 118 is used for being inserted into the card plate 21 of the power distribution unit, a third elastic member 119 is disposed in the insertion hole 118, and the card plate 21 can be clamped in the insertion hole 118 by elastic deformation of the third elastic member 119. The jack 118 can be set up on the side of casing relative with the tractive spare, through set up jack 118 on the casing to and set up third elastic component 119 in jack 118, realize the grafting of circuit breaker and distribution unit, just so can further improve the joint strength of circuit breaker and distribution unit.

The third elastic member 119 includes opposite elastic pieces, and after the card board is inserted into the receptacle, the card board is fixed in the receptacle by pressing the elastic pieces against the card board. Of course, the third elastic member 119 may be an elastic structural member of other structures.

In order to enable the first buckle 1131 and the second buckle 1132 to move along the first direction relative to the housing, a first slide way for the first buckle 1131 to slide is provided in the housing, and a second slide way for the second buckle 1132 to slide is also provided, and the extending directions of the first slide way and the second slide way are both parallel to the first direction.

In order to make the first buckle 1131 and the second buckle 1132 smoothly connect with the power distribution unit, the end portions of the first buckle 1131 and the second buckle 1132, which are matched with the power distribution unit, are formed with inclined planes, and the inclined planes can enable the first buckle and the second buckle to smoothly slide into the clamping grooves of the power distribution unit.

Referring to fig. 9 and 10, a first inclined abutment surface is formed at an end of the pull member 112 close to the first catch 1131, and a second inclined abutment surface is formed at an end of the first catch 1131 close to the pull member 112 to be matched with the first inclined abutment surface. Similarly, a third inclined abutting surface is formed at the end of the pulling member 112 close to the second hook 1132, and a fourth inclined abutting surface matched with the third inclined abutting surface is also formed at the end of the second hook 1132 close to the pulling member 112. Wherein the first and second inclined abutment surfaces, and the third and fourth inclined abutment surfaces may be inclined surfaces at 45 °.

To prevent the first end of the pull member 112 from being pulled out of the housing when pulling the pull member 112, the circuit breaker further comprises a stopper structure for preventing the first end of the pull member from sliding outside the housing.

The implementation structure of the limiting structure has a plurality of cases, and the following explanation is provided by two embodiments.

Example one

Referring to fig. 9, the limiting structure includes a limiting groove 115 and a limiting pin 114, the limiting groove 115 is opened on the pulling member 112, one end of the limiting pin 114 is fixed to the housing, the other end is located in the limiting groove 115, and the extending direction of the limiting groove 115 is parallel to the second direction.

Example two

The limiting structure comprises a limiting groove 115 and a limiting pin 114, the limiting groove 115 is formed in the shell 101, one end of the limiting pin 114 is relatively fixed with the traction piece, the other end of the limiting pin is located in the limiting groove 115, and the extending direction of the limiting groove 115 is parallel to the second direction.

In order to improve the safety performance of the circuit breaker, referring to fig. 3 and 4, the circuit breaker further includes: the safety door 6 is provided with a sliding groove on the shell, the safety door 6 is inserted into the sliding groove, the elastic part 7 is installed on the safety door 6, and the safety door 6 slides in the sliding groove through the support arm of the button 5 and the elastic part 7, so that when the first wire outlet end or the second wire outlet end is not inserted with a connecting wire and the moving contact 9 and the static contact 10 are in a closing state, the first wire outlet end or the second wire outlet end is shielded by the safety door 6, and the safety of the breaker can be further improved.

The first wire outlet end or the second wire outlet end is shielded by the safety door 6, one part of the first wire outlet end or the second wire outlet end can be shielded by the safety door 6, and the whole part of the first wire outlet end or the second wire outlet end can be shielded by the safety door 6, wherein the degree of shielding the wire outlet end by the safety door 6 is not limited in the embodiment, and the conventional wire can be prevented from being inserted through the wire outlet end in the state that the wire outlet end is shielded by the safety door 6.

In order to enable the safety door 6 to completely shield the outlet end, correspondingly, the height of the safety door 6 is greater than the diameter of the outlet end, no conducting wire is inserted into the outlet end, and when the movable contact 9 and the static contact 10 are in a closing state, the outlet end is completely shielded by the safety door 6. This kind of leading-out terminal is sheltered from by emergency exit 6 completely, not only can avoid the circuit breaker under the combined floodgate state, during the mistake inserts the wire into the leading-out terminal, but also can be in the leading-out terminal not inserted under the state of wire, avoid the dust to enter into the circuit breaker, reach waterproof dirt-proof effect.

In order to avoid affecting the switching-on and switching-off of the movable contact piece 9 and the fixed contact 10 operated by the button 5, correspondingly, the maximum elastic force value of the elastic piece 7 is smaller than the rotating force between the button 5 and the link mechanism 8.

The safety door 6 has various structures, and for example, referring to fig. 11, the safety door 6 includes a horizontal plate 61 and a vertical plate 62, the horizontal plate 61 is hung on the arm of the button 5, the elastic member 7 is mounted on the horizontal plate 61, and the vertical plate 62 is inserted into the sliding groove in the housing. Of course, the safety door may have another structure, and the structure of the safety door is not limited herein.

In order to avoid the misoperation of the button 5, correspondingly, as shown in fig. 2, the circuit breaker further comprises a button cap 13, wherein the button cap 13 covers the button 5, and the button cap 13 is rotatably arranged on the shell 101.

In implementation, the button cap 13 is adapted to the button 5, and can cover the button 5 and be rotatably mounted on the housing, so that when a user needs to operate the button 5, the button cap 13 needs to be lifted, and the situation that the button 5 is touched by mistake due to carelessness can be reduced.

In a second aspect, an embodiment of the present application further provides a power distribution system, referring to fig. 12 and fig. 13, the power distribution system includes a power distribution unit 2 and a plurality of circuit breakers 1, and a first transition metal sheet 31 and a second transition metal sheet 32, where the circuit breaker 1 is the circuit breaker provided in the embodiment of the first aspect, the plurality of circuit breakers 1 are disposed in the power distribution unit, and the plurality of circuit breakers 1 are arranged side by side, the power distribution unit 2 is electrically connected to a first incoming line end through a first incoming line conductor 41, and is electrically connected to a second incoming line end through a second incoming line conductor 42, the first transition metal sheet 31 electrically connects first transition ends of two adjacent circuit breakers 1, and the second transition metal sheet 32 electrically connects second transition ends of two adjacent circuit breakers 1.

Because this distribution system includes the circuit breaker 1 that the embodiment of the above-mentioned first aspect provided, this circuit breaker 1 has first switching end and second switching end, connects through first switching sheetmetal electricity between the first switching end of two adjacent circuit breakers, and the second switching end of two adjacent circuit breakers passes through second switching sheetmetal electricity and connects to realize the reposition of redundant personnel of electric current, need not set up the connector, simplified whole distribution system's structure, reduce the space that occupies.

Referring to fig. 12 and 13, the circuit breaker includes a first circuit breaker and a second circuit breaker which are adjacent to each other, referring to fig. 14, each of the first transition metal plate 31 and the second transition metal plate 32 includes a plate-shaped metal plate 151, and a first metal insertion plate 152 and a second metal insertion plate 153 which are disposed on the plate-shaped metal plate, the first metal insertion plate 152 of the first transition metal plate 31 is inserted into a first transition end of the first circuit breaker, the second metal insertion plate 153 of the first transition metal plate 32 is inserted into a first transition end of the second circuit breaker, the first metal insertion plate 152 of the second transition metal plate 32 is inserted into a second transition end of the first circuit breaker, and the second metal insertion plate 153 of the second transition metal plate 32 is inserted into a second transition end of the second circuit breaker.

Of course, when three circuit breakers are adjacent, each of the first and second

transition metal sheets

31 and 32 includes a plate-shaped metal sheet 151 and first and second

metal insert plates

152 and 153 and a third metal insert plate provided on the plate-shaped metal sheet. By analogy, when n circuit breakers are adjacent, n metal insertion plates can be arranged on the plate-shaped metal sheet.

Preferably, the sheet metal and the metal insert plate are integrally formed, and compared with the connection by adopting a welding structure, the connection points are fewer, and the impedance is also reduced.

In the description herein, particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A breaker comprises a shell, a moving contact and a fixed contact which are positioned in the shell, and is characterized in that,

the shell is provided with a first wire inlet end, a second wire inlet end, a first wire outlet end, a second wire outlet end, a first switching end and a second switching end, the first switching end is used for being electrically connected with the first switching end of another circuit breaker through a first switching metal sheet, and the second switching end is used for being electrically connected with the second switching end of another circuit breaker through a second switching metal sheet;

the shell is internally provided with a first metal bus bar and a second metal bus bar, the first metal bus bar is electrically connected with the first wire inlet end, the first switching end and the local output terminal positioned in the shell, and the second metal bus bar is electrically connected with the second wire inlet end, the second switching end and the static contact.

2. The circuit breaker of claim 1, wherein the housing has first and second adjacent sides, the first and second line inlet ends, the first and second transfer ends each disposed on the first side, and the first and second line outlet ends disposed on the second side.

3. The circuit breaker according to claim 1 or 2, further comprising:

a first locking member and/or a second locking member;

the first locking piece is used for fastening the first switching metal sheet on the first switching end and fastening a first incoming wire on the first incoming wire end;

the second locking piece is used for fastening the second switching metal sheet on the second switching end and can fasten a second inlet wire lead on the second inlet wire end.

4. The circuit breaker of claim 3, wherein the first locking member comprises:

a first end of the two opposite ends of the first screw rod is positioned outside the shell, a second end of the first screw rod penetrates through a through hole in the first end of the first metal bus plate and extends into the shell, and the first end of the first metal bus plate is the end of the first metal bus plate inserted into the first transfer end;

the first metal pressing plate is arranged at a position close to the first end of the first screw rod, the first metal pressing plate and the first screw rod are relatively fixed, and the first metal pressing plate is positioned between the first end of the first metal bus plate and the first end of the first screw rod;

first metal wiring frame sets up and is being close to the position department of the second end of first screw rod, be formed with the cavity in the first metal wiring frame, the second end of first metal cylinder manifold stretch into to in the cavity, so that the cavity forms first cavity and second cavity, the second end of first screw rod passes first metal wiring frame stretch into to first cavity, just first metal wiring frame with first screw rod screw-thread fit, the second cavity can supply first inlet wire conductor inserts, the second end of first metal cylinder manifold does the insertion of first metal cylinder manifold one end in the first inlet wire end.

5. The circuit breaker of claim 4, further comprising:

and the first locking elastic piece is arranged close to the first metal wiring frame and can apply elastic force to the first metal wiring frame towards the first end of the first screw rod, so that a space for the first transfer metal sheet to be inserted is formed between the first metal pressing plate and the first end of the first metal wiring.

6. The circuit breaker of claim 5, wherein the first locking spring is disposed within the first cavity, one end of the first locking spring being connected to the second end of the first metal bus plate, and the other end of the first locking spring being connected to the first metal terminal frame.

7. The circuit breaker according to any one of claims 4 to 6, further comprising:

the first screw rod can drive the first metal pressing plate and the first insulating shielding plate to synchronously move when moving along the extending direction of the first screw rod, so that the first insulating shielding plate moves and shields the opening of the first transfer end.

8. The circuit breaker of claim 1 or 2, wherein the first metal bus plate comprises:

a transverse plate;

the vertical plate is connected to the middle of the transverse plate, a first extending portion and a second extending portion are arranged at two ends of the transverse plate and extend towards the direction far away from the vertical plate, the first extending portion extends into the first transfer end, the second extending portion extends into the first wire inlet end, and the end portion, far away from the transverse plate, of the vertical plate is electrically connected with the local output terminal.

9. The circuit breaker of claim 3, wherein the first metal bus plate comprises:

a transverse plate;

10. The circuit breaker of claim 4, wherein the first metal bus plate comprises:

a transverse plate;

11. The circuit breaker of claim 8, wherein the cross plate and the riser are connected by a welded structure to obtain the first metal bus bar, or wherein the cross plate and the riser are integrally formed to obtain the first metal bus bar.

12. The circuit breaker according to claim 1 or 2, further comprising:

the buckle can move between an extending position and a retracting position along a first direction relative to the shell, when the buckle is located at the extending position, the buckle is located outside the shell and used for being clamped with the power distribution unit, and when the buckle is located at the retracting position, the buckle is located inside the shell and separated from the power distribution unit;

a pull member movable in a second direction relative to the housing, the second direction being perpendicular to the first direction, the pull member having opposing first and second ends, the first end being located within the housing and the second end being located outside the housing, the first end abutting the buckle when the buckle is in the extended position and the first end being separated from the buckle when the buckle is in the retracted position;

a first elastic member capable of applying an elastic force to the pulling member so that the first end portion abuts against the buckle to apply a pushing force to the buckle toward the outside of the housing so as to place the buckle in the extended position;

and the second elastic piece can apply elastic force to the buckle, and can restore the buckle from the retracted position to the extended position under the condition that the first end part is separated from the buckle when the traction piece is pulled.

13. The circuit breaker of claim 3, further comprising:

14. The circuit breaker of claim 12, wherein the latch comprises a first latch and a second latch, the first latch and the second latch are oppositely disposed on two sides of the pulling member, and one end of the first latch located in the housing and one end of the second latch located in the housing are connected by the second elastic member.

15. The circuit breaker of claim 12, further comprising a stop structure for preventing the first end of the pull from sliding outside the housing;

the limit structure comprises:

the extending direction of the limiting groove is parallel to the second direction;

one end of the limiting pin is located in the limiting groove, one of the limiting groove and the limiting pin is arranged on the traction piece, and the other is arranged on the shell.

16. The circuit breaker of claim 14, further comprising a stop structure for preventing the first end of the pull from sliding outside the housing;

the limit structure comprises:

17. The circuit breaker as claimed in claim 12, wherein the housing defines a socket for being inserted into a card board of the power distribution unit, and a third elastic member is disposed in the socket, and the elastic deformation of the third elastic member can clamp the card board in the socket.

18. The circuit breaker of claim 1 or 2, further comprising a guide structure for guiding the circuit breaker to move in a second direction for insertion into a power distribution unit.

19. An electrical distribution system, comprising:

a plurality of circuit breakers according to any one of claims 1 to 18;

the circuit breakers are arranged in the power distribution unit, the circuit breakers are arranged side by side, and the power distribution unit is electrically connected with the first wire inlet end through a first wire inlet lead and is electrically connected with the second wire inlet end through a second wire inlet lead;

the first transfer metal sheet is electrically connected with the first transfer ends of two adjacent circuit breakers;

and the second transfer metal sheet is electrically connected with the second transfer ends of two adjacent circuit breakers.

20. The power distribution system of claim 19,

the circuit breaker includes: adjacent first and second circuit breakers;

the first transfer metal sheet and the second transfer metal sheet respectively comprise a plate-shaped metal sheet, and a first metal inserting plate and a second metal inserting plate which are arranged on the plate-shaped metal sheet;

a first metal flashboard of the first transfer metal sheet is inserted into a first transfer end of the first circuit breaker, and a second metal flashboard of the first transfer metal sheet is inserted into a first transfer end of the second circuit breaker;

the first metal flashboard of the second switching metal sheet is inserted into the second switching end of the first circuit breaker, and the second metal flashboard of the second switching metal sheet is inserted into the second switching end of the second circuit breaker.