CN210489572U

CN210489572U - Circuit breaker

Info

Publication number: CN210489572U
Application number: CN201921771610.6U
Authority: CN
Inventors: 于贻鹏; 龚祚勇; 谢建波; 安海川
Original assignee: Shanghai Liangxin Electrical Co Ltd
Current assignee: Shanghai Liangxin Electrical Co Ltd
Priority date: 2019-10-21
Filing date: 2019-10-21
Publication date: 2020-05-08
Anticipated expiration: 2029-10-21

Abstract

The utility model discloses a circuit breaker relates to circuit breaker technical field. The circuit breaker comprises a shell, and a main control board, an electric operating mechanism, a switching-on/off mechanism and an arc extinguishing mechanism which are arranged in the shell. Be provided with the installation space layer in the shell, main control board, electric operating mechanism, switching on and switching off mechanism and arc extinguishing mechanism all install in the installation space layer, and main control board and electric operating mechanism all set up in one side of switching on and switching off mechanism, and arc extinguishing mechanism sets up in the opposite side that switching on and switching off mechanism is relative, and electric operating mechanism is connected with switching on and switching off mechanism, and switching on and switching off mechanism is connected with arc extinguishing mechanism, and electric operating mechanism is connected with the main control board. Compared with the prior art, the utility model provides a circuit breaker can realize the remote control of divide-shut brake to occupation space is little, integrates the degree height, can realize the configuration optimization of circuit breaker, and the wire of the circuit breaker of being convenient for is arranged, improves the wholeness ability of circuit breaker.

Description

Circuit breaker

Technical Field

The utility model relates to a circuit breaker technical field particularly, relates to a circuit breaker.

Background

The circuit breaker is also called an automatic switch, and is an electric appliance which not only has the function of a manual switch, but also can automatically perform voltage loss, undervoltage, overload and short-circuit protection. It can be used for distributing electric energy, protecting power supply circuit and motor, etc., and when they are seriously overloaded or short-circuited or under-voltage, etc. faults occur, it can automatically cut off circuit, its function is equivalent to the combination of fuse type switch and over-and under-heat relay, etc., and after the fault current is cut off, it has no need of changing parts, so that it has been extensively used.

At present, but electric operating mechanism among remote operation's the circuit breaker is the concatenation formula, and it is great to occupy space, is unfavorable for the wire to arrange, and current small-size bayonet circuit breaker does not have electric operating mechanism to can not directly splice borrow current electric operating mechanism, consequently can't realize automatic divide-shut brake.

In view of the above, it is important to design and manufacture a circuit breaker capable of being remotely controlled, especially in the production of the circuit breaker.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a circuit breaker can realize the remote control of divide-shut brake to occupation space is little, integrates the degree height, can realize the configuration optimization of circuit breaker, and the wire of the circuit breaker of being convenient for is arranged, improves the wholeness ability of circuit breaker.

The utility model is realized by adopting the following technical scheme.

A circuit breaker comprises a shell, a main control board, an electric operating mechanism, a switching-on/off mechanism and an arc extinguishing mechanism, wherein the main control board, the electric operating mechanism, the switching-on/off mechanism and the arc extinguishing mechanism are arranged in the shell; an installation space layer is arranged in the shell; the main control board, the electric operating mechanism, the switching on/off mechanism and the arc extinguishing mechanism are all arranged in the installation space layer, the main control board and the electric operating mechanism are all arranged on one side of the switching on/off mechanism, and the arc extinguishing mechanism is arranged on the other side opposite to the switching on/off mechanism; the electric operating mechanism is connected with the switching-on/off mechanism, the switching-on/off mechanism is connected with the arc extinguishing mechanism, the electric operating mechanism is connected with the main control board, and the electric operating mechanism is used for driving the switching-on/off mechanism to switch on or switch off under the control of the main control board.

Furthermore, the electric operating mechanism comprises a driving motor, a gear transmission assembly and a final-stage gear, the driving motor, the gear transmission assembly and the final-stage gear are all installed in the installation space layer, the driving motor is connected with the final-stage gear through the gear transmission assembly, the final-stage gear is connected with the switching-on/off mechanism, and the driving motor, the gear transmission assembly, the final-stage gear, the switching-on/off mechanism and the arc extinguishing mechanism are sequentially arranged.

Further, the main control board and the driving motor are stacked.

Furthermore, the circuit breaker also comprises a locking mechanism, a fusion welding detection mechanism and a wiring detection mechanism; the locking mechanism is in transmission connection with the final-stage gear, is arranged above the final-stage gear, and is used for locking the shell in the cabinet when the switching-on and switching-off mechanism is switched on and also used for unlocking the shell from the cabinet when the switching-on and switching-off mechanism is switched off; the fusion welding detection mechanism is selectively contacted with the switching-on/off mechanism and is connected with the main control board, and the fusion welding detection mechanism is used for sending a fusion welding alarm signal to the main control board when fusion welding faults of the switching-on/off mechanism are detected; the wiring detection mechanism is connected with the main control board, the shell is provided with a wire outlet port, the position of the wiring detection mechanism corresponds to the position of the wire outlet port, the wiring detection mechanism is used for sending a control signal to the main control board when detecting that a wire is not accessed, and the main control board is used for controlling the switching-on and switching-off mechanism when receiving the control signal so as to ensure that the switching-on and switching-off mechanism is in a switching-off state.

Furthermore, the final-stage gear comprises a matching tooth part and a transmission tooth part which are coaxially arranged and fixedly connected, the transmission tooth part is provided with a propping curved surface along the circumferential direction of the transmission tooth part, the matching tooth part is matched with the gear transmission assembly, the transmission tooth part is matched with the switching-on/off mechanism, and the propping curved surface is propped against the locking mechanism.

Further, gear drive assembly includes worm, first gear and second gear, and first gear and second gear are all rotated and are connected in the shell, and first gear is including coaxial setting and fixed connection's worm gear portion and first tooth portion, and the second gear is including coaxial setting and fixed connection's second tooth portion and third tooth portion, worm and driving motor's output shaft fixed connection, and with the worm gear portion meshing, first tooth portion and second tooth portion meshing, third tooth portion and cooperation tooth portion meshing.

Further, locking mechanical system includes the hasp piece, first torsion spring and deblocking spare, the through-hole has been seted up to the shell, the hasp piece is installed in the shell, and can rotate for the shell, the hasp piece can stretch out the through-hole, and with the rack lock, first torsion spring is installed on the shell, and its one end supports with the hasp piece and holds, the deblocking spare rotates to be connected in the shell, the one end of deblocking spare supports with supporting the curved surface and holds, the other end supports with the hasp piece and holds, the deblocking spare can rotate for the shell under the drive of final gear, rotate for the shell with the elasticity that the drive hasp piece overcome first torsion spring, and then make the hasp piece break away from the rack, and the retraction through-hole.

Further, the locking fastener comprises a rotating shaft, a connecting portion, a buckling portion and a supporting portion, the rotating shaft, the buckling portion and the supporting portion are fixedly connected to the connecting portion, the rotating shaft and the supporting portion are arranged at two ends of the connecting portion relatively, the rotating shaft stretches into the shell and can rotate relative to the shell, the supporting portion is supported by the unlocking piece, the buckling portion and the first torsion spring are arranged on two sides of the connecting portion relatively, the buckling portion is matched with the through hole, and the first torsion spring is supported by the connecting portion.

Furthermore, the unlocking piece comprises a first convex part, a rotating part and a second convex part, the first convex part is fixedly connected with the second convex part through the rotating part, the first convex part and the second convex part are arranged at a preset included angle, the first convex part is abutted to the abutting curved surface, and the second convex part is abutted to the locking piece.

Furthermore, the switching-on and switching-off mechanism comprises a rotating shaft gear, a transmission part, a tripping component, a moving contact and a static contact, wherein the rotating shaft gear is meshed with the final-stage gear, one end of the transmission part is movably connected with the rotating shaft gear, the other end of the transmission part is movably connected with the moving contact through the tripping component, the moving contact is rotatably connected in the shell and selectively abutted against the static contact, and the static contact is fixedly connected in the shell.

Furthermore, fusion welding detection mechanism includes position detector and detection contact, and position detector and detection contact all are connected with the main control board, and position detector is used for sending first signal to the main control board when pivot gear is in the intermediate position between closing position and the separating brake position, and detection contact is used for sending the second signal to the main control board when moving contact and static contact support, and the main control board is used for sending fusion welding alarm signal when receiving first signal and second signal simultaneously.

Further, the position detector comprises a first Hall sensor and a first magnetic part, the first Hall sensor is installed on the main control board and corresponds to the middle position, the first magnetic part is installed on the rotating shaft gear, and the first Hall sensor can be electrified by induction of the first magnetic part when the rotating shaft gear rotates to the middle position so as to send a first signal to the main control board.

Further, the position detector further comprises a second Hall sensor, a third Hall sensor and a second magnetic part, the second Hall sensor and the third Hall sensor are installed on the main control board, the second magnetic part is installed on the final-stage gear, the second Hall sensor can be electrified through induction with the second magnetic part when the final-stage gear drives the rotating shaft gear to rotate to the switching-on position, so that a third signal is sent to the main control board, and the third Hall sensor can be electrified through induction with the second magnetic part when the final-stage gear drives the rotating shaft gear to rotate to the switching-off position, so that a fourth signal is sent to the main control board.

Furthermore, the detection contact piece is fixedly installed in the shell, the elastic arm is arranged in the detection contact piece in an extending mode, the moving contact is provided with an extending portion with a groove, the elastic arm can extend into the groove when the moving contact is abutted to the fixed contact and is abutted to the extending portion so that the moving contact is conducted with the detection contact piece, and therefore the detection contact piece can send out a second signal to the main control board.

Further, wiring detection mechanism includes wiring board, mounting bracket, shell fragment and determine module, and the opening has been seted up to the mounting bracket, wiring board and mounting bracket fixed connection, and set up in the opening, shell fragment and mounting bracket fixed connection, and stretch into the opening, and the shell fragment can be held the wire pressure on the wiring board, and determine module sets up in one side that the wiring board was kept away from to the shell fragment, and is connected with the main control board, and determine module is used for detecting whether the centre gripping has the wire between shell fragment and the wiring board.

Furthermore, the detection assembly comprises a partition plate, a rotating part, a second torsion spring, a first conductive part and a second conductive part, the partition plate is provided with an installation shaft, the second torsion spring and the rotating part are sleeved outside the installation shaft and can rotate relative to the installation shaft, the rotating part abuts against the elastic piece, the first conductive part and the second conductive part are arranged at intervals and are fixedly connected to the partition plate and are electrically connected with the main control board, the second torsion spring is provided with a first elastic arm and a second elastic arm, the first elastic arm abuts against the rotating part and the first conductive part respectively, the second elastic arm abuts against the second conductive part, the main control board, the first conductive part, the second torsion spring and the second conductive part form a conductive path, the elastic piece can move towards a direction away from the wiring board when being externally connected with a lead so as to push the rotating part to rotate relative to the installation shaft, so as to drive the first elastic arm to be separated from the first conductive part so, the main control board is used for controlling the opening and closing of the opening and closing mechanism when the conductive path is communicated.

Further, the quantity of wiring board, mounting bracket, shell fragment, rotation piece, second torsional spring and installation axle is two, and two installation axles set up in the both sides of baffle relatively, and two parallelly connected settings of second torsional spring are between first electrically conductive piece and the second electrically conductive piece.

Furthermore, the circuit breaker further comprises an electric energy metering module, the electric energy metering module is connected with the main control board, and the electric energy metering module is used for detecting passing current so as to meter electric energy.

Further, the circuit breaker still includes voltage detection module, voltage detection module includes first sense terminal, second sense terminal and power supply common terminal, first sense terminal, second sense terminal and power supply common terminal all are connected with the main control board electricity, first sense terminal and power supply common terminal are used for detecting the main voltage between the both ends of main power supply, second sense terminal and power supply common terminal are used for detecting the reserve voltage between the both ends of reserve power supply, the main control board is used for controlling closing and opening mechanism when main voltage and reserve voltage do not satisfy the preset closing condition, in order to guarantee to close and open mechanism and be in the separating brake state.

Further, the circuit breaker still includes the temperature detection module, the temperature detection module includes first temperature sensor, second temperature sensor and current detector, the circuit breaker is provided with the electrically conductive row that is used for being connected with load equipment, first temperature sensor, second temperature sensor and current detector all are connected with the main control board electricity, first temperature sensor and current detector all connect on electrically conductive row, second temperature sensor installs in the shell, second temperature sensor is used for detecting the temperature of the inside air of shell, the main control board is used for controlling closing the separating brake mechanism when the electric current of electrically conductive row, the temperature of electrically conductive row and the temperature of the inside air of shell are unsatisfied to predetermineeing the logic range, in order to guarantee to close the separating brake mechanism and be in the separating brake state.

Furthermore, the circuit breaker also comprises an address acquisition module, wherein the address acquisition module comprises a first power interface, a first address identification interface and a first communication interface, the first power interface is used for being connected with a power supply through a second power interface of the cabinet, the first power interface is connected with the first address identification interface, a main control board is connected with the first power interface, the main control board is connected with the first address identification interface, the first address identification interface is used for being connected with a second address identification interface of the cabinet, the main control board is connected with the first communication interface, the first communication interface is used for being connected with a communication line of the cabinet through a second communication interface of the cabinet, the main control board is used for sampling voltage signals at the connecting position of the first address identification interface and the second address identification interface when the first address identification interface is connected with the second address identification interface, and determining the communication address of the circuit breaker according to the sampled voltage signals, and communicating with the power distribution equipment according to the communication address and through the communication line.

Furthermore, the main control board comprises a control unit and a communication unit, the control unit is connected with the communication unit, the control unit is respectively connected with the first power interface and the first address identification interface, and the communication unit is respectively connected with the first power interface and the first communication interface.

The utility model provides a circuit breaker has following beneficial effect:

the utility model provides a circuit breaker, main control board, electric operating mechanism, closing and separating brake mechanism and arc extinguishing mechanism all set up in the installation space in situ of shell for main control board, electric operating mechanism, closing and separating brake mechanism and arc extinguishing mechanism are located same space in situ, and main control board and electric operating mechanism set up in one side that closing and separating brake mechanism kept away from arc extinguishing mechanism. Compared with the prior art, the utility model provides a circuit breaker can realize the remote control of divide-shut brake to occupation space is little, integrates the degree height, can realize the configuration optimization of circuit breaker, and the wire of the circuit breaker of being convenient for is arranged, improves the wholeness ability of circuit breaker.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of a circuit breaker provided in an embodiment of the present invention in a closing state;

fig. 2 is a schematic structural diagram of a circuit breaker in a fusion welding state according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a circuit breaker in an open state according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a view angle of an electric operating mechanism in a circuit breaker according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of another view angle of the electric operating mechanism in the circuit breaker according to the embodiment of the present invention;

FIG. 6 is a schematic structural view of the final stage gear of FIG. 4;

fig. 7 is a schematic structural diagram of a circuit breaker according to an embodiment of the present invention, in which a locking mechanism is in a closing state;

fig. 8 is a schematic structural diagram of a circuit breaker according to an embodiment of the present invention, in which a locking mechanism is in an open state;

FIG. 9 is a schematic view of the locking device of FIG. 7;

FIG. 10 is a schematic view of the unlocking member of FIG. 7;

fig. 11 is a schematic structural diagram of a closing/opening mechanism in a circuit breaker according to an embodiment of the present invention in a fusion welding state;

fig. 12 is a schematic structural diagram of a switching mechanism in a circuit breaker according to an embodiment of the present invention in a switching state;

FIG. 13 is an exploded view of the position detector of FIG. 11 mated with the final stage gear and the spindle gear, respectively;

fig. 14 is an exploded view of the detection contact of fig. 11 in engagement with the movable contact;

FIG. 15 is a schematic view of the connection of the detection contacts to the housing of FIG. 11;

fig. 16 is a schematic structural diagram of a circuit breaker middle connection detection mechanism in a non-connected state according to an embodiment of the present invention;

fig. 17 is a schematic structural diagram of a circuit breaker in which a wiring detection mechanism is in a wiring state according to an embodiment of the present invention;

FIG. 18 is a schematic view of the detection assembly of FIG. 16 from a perspective;

FIG. 19 is a schematic view of the detection assembly of FIG. 16 from another perspective;

FIG. 20 is a schematic view of the rotary member shown in FIG. 19;

fig. 21 is a schematic structural diagram of a voltage detection module in a circuit breaker according to an embodiment of the present invention;

fig. 22 is a block diagram illustrating a structure in which a temperature detection module is connected to a main control board in a circuit breaker according to an embodiment of the present invention;

fig. 23 is a block diagram of a structure in which a main control board is connected to a cabinet through an address acquisition module in a circuit breaker provided by an embodiment of the present invention.

Icon: 100-a circuit breaker; 110-a housing; 111-outlet port; 112-a through hole; 113-a slot; 114-installation space layer; 115-inlet port; 120-a main control board; 121-a control unit; 122-a communication unit; 130-an electric operating mechanism; 131-a drive motor; 132-a gear assembly; 1321-worm; 1322-a first gear; 1323-a second gear; 1324-worm gear section; 1325 — a first tooth; 1326-second tooth; 1327-third tooth; 133-final gear; 1331-mating teeth; 1332-driving tooth parts; 1333-holding the curved surface; 1334-a first arc surface; 1335-a second arc surface; 140-switching on and off the brake mechanism; 141-shaft gear; 142-a transmission member; 143-a trip assembly; 144-moving contact; 1441-groove; 1442 — an extension; 145-static contact; 150-an arc extinguishing mechanism; 160-a locking mechanism; 161-catch piece; 1611-a rotating shaft; 1612-a connecting portion; 1613-a latch; 1614-a holding portion; 162-a first torsion spring; 163-unlocking; 1631-a first convex portion; 1632-a rotating portion; 1633-a second convex portion; 170-fusion welding detection mechanism; 171-a position detector; 1712-a first hall sensor; 1713-a first magnetic member; 1714-a second hall sensor; 1715-a third hall sensor; 1716-a second magnetic member; 172-detection contact pad; 1721-a resilient arm; 1722-an L-shaped bend; 180-a wiring detection mechanism; 181 — patch panel; 182-a mounting frame; 1821-an opening; 183-shrapnel; 184-a detection component; 1841-a separator; 1842-a rotating member; 1843-a second torsion spring; 1844-a first electrically conductive member; 1845-a second electrically conductive member; 1846-first elastic arm; 1847-a second elastic arm; 1848-mounting the shaft; 1849-Boss; 190-wire; 200-electric energy metering module; 210-a voltage detection module; 211-a first detection end; 212-a second detection terminal; 213-power supply common; 220-temperature detection module; 221-a first temperature sensor; 222-a second temperature sensor; 223-a current detector; 230-address acquisition module; 231-a first power interface; 232-first address identification interface; 233 — a first communication interface; 240-cabinet.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "inside", "outside", "upper", "lower", "horizontal", and the like indicate the directions or positional relationships based on the directions or positional relationships shown in the drawings, or the directions or positional relationships that the products of the present invention are conventionally placed when used, and are only for the convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "connected," "mounted," and "connected" are to be construed broadly, e.g., as meaning 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 in specific cases to those skilled in the art.

Some embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Features in the embodiments described below may be combined with each other without conflict.

Examples

Referring to fig. 1, fig. 2 and fig. 3, an embodiment of the present invention provides a circuit breaker 100 for automatically breaking a circuit in case of a severe overload, a short circuit or an undervoltage. Its remote control that can realize divide-shut brake to occupation space is little, integrates the degree height, can realize the configuration optimization of circuit breaker, and the wire of the circuit breaker of being convenient for arranges, improves the wholeness ability of circuit breaker.

The circuit breaker 100 includes a case 110, a main control board 120, an electric operating mechanism 130, a switching mechanism 140, an arc extinguishing mechanism 150, a locking mechanism 160, a welding detection mechanism 170, and a wire connection detection mechanism 180. The main control board 120, the electric operating mechanism 130, the switching mechanism 140, the arc extinguishing mechanism 150, the locking mechanism 160, the fusion welding detection mechanism 170 and the wiring detection mechanism 180 are all installed in the housing 110.

It should be noted that an installation space layer 114 is provided in the housing 110. The main control board 120, the electric operating mechanism 130, the switching mechanism 140, and the arc extinguishing mechanism 150 are all installed in the installation space layer 114. The main control board 120 and the electric operating mechanism 130 are both disposed on one side of the switching on/off mechanism 140, and the arc extinguishing mechanism 150 is disposed on the other side of the switching on/off mechanism 140 opposite to each other, so that the arrangement of the wires inside the circuit breaker 100 is facilitated, the internal structure of the circuit breaker 100 is compact, and the overall performance of the circuit breaker 100 is improved.

Specifically, the main control board 120, the electric operating mechanism 130, the switching on/off mechanism 140, and the arc extinguishing mechanism 150 are all installed on an inner sidewall of the housing 110 and are all located in the same spatial layer, wherein distances between the main control board 120, the electric operating mechanism 130, the switching on/off mechanism 140, and the arc extinguishing mechanism 150 and the inner sidewall may all be equal, or may have a deviation of a certain extent, that is, positions of the main control board 120, the electric operating mechanism 130, the switching on/off mechanism 140, and the arc extinguishing mechanism 150 in the installation spatial layer 114 may be in the same plane, or may have a certain degree of misalignment, and the degree of misalignment needs to be determined according to an actual product, which is not specifically limited herein.

The electric operating mechanism 130 is connected to the main control board 120, and the main control board 120 can control the electric operating mechanism 130 to move. The electric operating mechanism 130 is connected to the switching mechanism 140, and the electric operating mechanism 130 can drive the switching mechanism 140 to perform switching on or switching off. The main control board 120 is in communication connection with an electronic device (not shown), and a user can remotely operate the main control board 120 through the electronic device to remotely control the switching-on/off mechanism 140, so as to remotely control the switching-on/off of the circuit breaker 100. The switching on/off mechanism 140 is connected to the arc extinguishing mechanism 150, and the arc extinguishing mechanism 150 can extinguish the arc generated by the switching on/off mechanism 140 during switching on or switching off, so as to ensure the safety of the circuit breaker 100. Specifically, the arc extinguishing mechanism 150 is a grid-plate type arc extinguishing device. In this embodiment, the electric operating mechanism 130 and the arc extinguishing mechanism 150 are disposed on the left and right sides of the switching mechanism 140, and the electric operating mechanism 130 is used for driving the switching mechanism 140 to switch on or switch off under the control of the main control board 120.

The locking mechanism 160 is in transmission connection with the electric operating mechanism 130, and the electric operating mechanism 130 can drive the locking mechanism 160 to move. The locking mechanism 160 is disposed above the electric operating mechanism 130, the locking mechanism 160 is configured to lock the housing 110 in a cabinet (not shown) when the switching-on/off mechanism 140 is switched on, so as to fix a relative position between the circuit breaker 100 and the cabinet, thereby preventing the circuit breaker 100 from being pulled out of the cabinet when the switching-on/off mechanism 140 is switched on, and the locking mechanism 160 is further configured to unlock the housing 110 from the cabinet when the switching-on/off mechanism 140 is switched off, so as to enable the circuit breaker 100 to be pulled out of the cabinet. In this embodiment, under the conventional state, the circuit breaker 100 is installed in the cabinet, and the switching-on/switching-off mechanism 140 is switched on and powered on to carry out overload protection on the electric equipment in the cabinet, if want to overhaul or maintain the circuit breaker 100, then need extract the circuit breaker 100 from the cabinet after switching-off the switching-on/switching-off mechanism 140, in order to produce electric arc when preventing to extract, avoid causing the influence to the electric equipment in the cabinet.

The welding detection mechanism 170 selectively contacts with the switching mechanism 140 and is connected to the main control board 120, and the welding detection mechanism 170 is configured to send a welding alarm signal to the main control board 120 when detecting that the switching mechanism 140 has a welding failure, so that the circuit breaker 100 has a contact welding detection function. In this embodiment, the fusion welding detection mechanism 170 detects the position of the closing/opening mechanism 140 while contacting the closing/opening mechanism 140, and if the closing/opening mechanism 140 is not in the closing state or the opening state, it determines that the fusion welding failure occurs in the closing/opening mechanism 140, and sends a fusion welding alarm signal to the main control board 120, so that the main control board 120 sends an alarm.

The wiring detection mechanism 180 is connected with the main control board 120, the outer shell 110 is provided with a wire outlet port 111, the position of the wiring detection mechanism 180 corresponds to the position of the wire outlet port 111, the wiring detection mechanism 180 is used for sending a control signal to the main control board 120 when detecting that the wire 190 is not connected, and the main control board 120 is used for controlling the closing and opening mechanism 140 when receiving the control signal so as to ensure that the closing and opening mechanism 140 is in a closing and opening state, so that the circuit breaker 100 has a wiring detection function. In this embodiment, the wire 190 is inserted into the housing 110 through the wire outlet port 111 and connected to the wire connection detection mechanism 180, when the wire connection detection mechanism 180 detects that the wire 190 is not connected, if the switching-on/off mechanism 140 is in a switching-on state at this time, the wire connection detection mechanism 180 sends a control signal to the main control board 120, the main control board 120 controls the switching-on/off mechanism 140 to switch off, so as to prevent switching-on during the wire connection process and cause an electric shock to a worker, and if the switching-on/off mechanism 140 is in a switching-off state at this time, the main control board 120 controls the switching-on/off mechanism 140 not to; when the wiring detection mechanism 180 detects that the wire 190 is connected, the main control board 120 releases the control of the closing and opening mechanism 140, and at this time, the wiring is completed, and the closing and opening mechanism 140 can normally work to perform closing or opening actions.

Referring to fig. 4, 5 and 6 in combination, the electric operating mechanism 130 includes a driving motor 131, a gear transmission assembly 132 and a final gear 133. The driving motor 131 is fixedly connected to the housing 110 and is connected to the final gear 133 through the gear assembly 132. The final gear 133 is rotatably connected to the housing 110 and is connected to the opening/closing mechanism 140. The driving motor 131 is connected to the main control board 120 to rotate under the control of the main control board 120, and the driving motor 131 can drive the final gear 133 to rotate through the gear transmission assembly 132 to drive the switching-on/off mechanism 140 to switch on or off. The driving motor 131 can rotate in the forward direction or the reverse direction, and when the main control board 120 controls the driving motor 131 to rotate in the forward direction, the switching on/off mechanism 140 performs a switching on operation, and when the main control board 120 controls the driving motor 131 to rotate in the reverse direction, the switching on/off mechanism 140 performs a switching off operation.

It should be noted that the driving motor 131, the gear transmission assembly 132 and the final gear 133 are all installed in the installation space layer 114, the driving motor 131, the gear transmission assembly 132, the final gear 133, the switching mechanism 140 and the arc extinguishing mechanism 150 are sequentially arranged, and the main control board 120 and the driving motor 131 are stacked. Through the structure setting of this mode, the inside wire of circuit breaker 100 of being convenient for arranges, guarantees circuit breaker 100 overall structure compactness to realize the miniaturized purpose of circuit breaker 100.

In this embodiment, the final stage gear 133 includes a mating tooth portion 1331 and a driving tooth portion 1332 that are coaxially disposed and fixedly connected, a plane on which the mating tooth portion 1331 is located is parallel to a plane on which the driving tooth portion 1332 is located at an interval, and a diameter of the mating tooth portion 1331 is larger than a diameter of the driving tooth portion 1332. The transmission tooth portion 1332 is provided with a retaining curved surface 1333 along the circumferential direction thereof, the matching tooth portion 1331 is matched with the gear transmission assembly 132 to rotate under the driving of the gear transmission assembly 132, the transmission tooth portion 1332 is matched with the switching-on/off mechanism 140 to drive the switching-on/off mechanism 140 to switch on or switch off, and the retaining curved surface 1333 is retained with the locking mechanism 160 to push the locking mechanism 160 to unlock.

Specifically, the mating tooth portion 1331 is semicircular, the mating tooth portion 1331 is provided with a first arc surface 1334, and the first arc surface 1334 is provided with teeth. The transmission tooth portion 1332 is further provided with a second arc surface 1335, the second arc surface 1335 is connected with the abutting curved surface 1333 end to end, the abutting curved surface 1333 is arranged on one side, close to the first arc surface 1334, of the transmission tooth portion 1332, the second arc surface 1335 is arranged on one side, far away from the first arc surface 1334, of the transmission tooth portion 1332, and teeth are arranged on the second arc surface 1335.

The gear assembly 132 includes a worm 1321, a first gear 1322, and a second gear 1323. The first gear 1322 and the second gear 1323 are rotatably connected in the housing 110, and the first gear 1322 is engaged with the second gear 1323. The first gear 1322 includes a worm wheel 1324 and a first tooth 1325, which are coaxially and fixedly connected, the plane of the worm wheel 1324 is parallel to the plane of the first tooth 1325, and the diameter of the worm wheel 1324 is larger than the diameter of the first tooth 1325. The second gear 1323 includes a second tooth portion 1326 and a third tooth portion 1327 which are coaxially arranged and fixedly connected, a plane on which the second tooth portion 1326 is located is arranged in parallel with a plane on which the third tooth portion 1327 is located at an interval, and the diameter of the second tooth portion 1326 is larger than that of the third tooth portion 1327. The worm 1321 is fixedly connected to an output shaft of the driving motor 131, and is engaged with the worm wheel 1324, the first tooth portion 1325 is engaged with the second tooth portion 1326, and the third tooth portion 1327 is engaged with the mating tooth portion 1331. When the driving motor 131 is started, the output shaft drives the worm 1321 to rotate, the worm 1321 drives the first tooth portion 1325 to rotate through the worm wheel portion 1324, the first tooth portion 1325 drives the third tooth portion 1327 to rotate through the second tooth portion 1326, the third tooth portion 1327 drives the transmission tooth portion 1332 to rotate through the matching tooth portion 1331, and the transmission tooth portion 1332 drives the switching-on/off mechanism 140 to switch on or off.

Referring to fig. 7 and 8 in combination, the locking mechanism 160 includes a locking member 161, a first torsion spring 162, and an unlocking member 163. The housing 110 has a through hole 112, and the locking member 161 is installed in the housing 110 and can rotate relative to the housing 110 to extend or retract into the through hole 112. The latch 161 can extend out of the through hole 112 and be fastened to the cabinet to fix the relative position of the housing 110 and the cabinet, thereby fixing the relative position of the cabinet of the circuit breaker 100. The first torsion spring 162 is installed on the housing 110, and one end of the first torsion spring abuts against the locking member 161 to apply an elastic force to the locking member 161, so as to push the locking member 161 to extend upward out of the through hole 112 and to be fastened with the cabinet. The unlocking member 163 is rotatably connected in the housing 110, one end of the unlocking member 163 abuts against the abutting curved surface 1333, and the other end abuts against the locking member 161, and the final-stage gear 133 can push the unlocking member 163 to rotate through the abutting curved surface 1333, so that the unlocking member 163 pushes the locking member 161 to rotate. The unlocking member 163 can rotate relative to the housing 110 under the driving of the final-stage gear 133 to drive the locking member 161 to rotate relative to the housing 110 against the elastic force of the first torsion spring 162, so that the locking member 161 is separated from the cabinet and retracts into the through hole 112.

It should be noted that, when the electric operating mechanism 130 drives the switching-on/off mechanism 140 to switch off, the driving motor 131 drives the final-stage gear 133 to rotate through the gear transmission assembly 132, at this time, the abutting curved surface 1333 applies a pushing force to the unlocking piece 163 to push the unlocking piece 163 to rotate relative to the housing 110, in this process, the unlocking piece 163 pushes the locking piece 161 to rotate, the locking piece 161 overcomes the elastic force of the first torsion spring 162 and retracts into the through hole 112 to release the locking with the cabinet, so that the circuit breaker 100 can be pulled out of the cabinet; when the electric operating mechanism 130 drives the switching-on/off mechanism 140 to switch on, the driving motor 131 drives the final-stage gear 133 to rotate reversely through the gear transmission assembly 132, at this time, the abutting curved surface 1333 does not apply thrust to the unlocking piece 163 any more, the locking piece 161 rotates under the elastic force of the first torsion spring 162, extends out of the through hole 112, and is fastened with the cabinet to fix the relative position of the circuit breaker 100 and the cabinet, and in the process, the locking piece 161 pushes the unlocking piece 163 to rotate, so that the unlocking piece 163 resets.

Referring to fig. 9, the locking element 161 includes a rotating shaft 1611, a connecting portion 1612, a locking portion 1613 and an abutting portion 1614. The rotation shaft 1611, the locking portion 1613 and the abutting portion 1614 are all fixedly connected to the connecting portion 1612, and the rotation shaft 1611 and the abutting portion 1614 are oppositely arranged at two ends of the connecting portion 1612. The rotation shaft 1611 extends into the housing 110 and can rotate relative to the housing 110, and the entire locking member 161 rotates around the rotation shaft 1611. The holding portion 1614 is held against the unlocking member 163, the unlocking member 163 can push the holding portion 1614 to rotate downward, and the holding portion 1614 can push the unlocking member 163 to reset upward. The fastening portion 1613 and the first torsion spring 162 are oppositely disposed on two sides of the connecting portion 1612, the fastening portion 1613 is engaged with the through hole 112, and the first torsion spring 162 abuts against the connecting portion 1612. Specifically, the latching portion 1613 is disposed above the connecting portion 1612, and the latching portion 1613 can rotate upward and protrude out of the through hole 112; the first torsion spring 162 is disposed below the connection portion 1612 to apply an elastic force rotating upward to the connection portion 1612.

Referring to fig. 10, the unlocking member 163 is substantially L-shaped, and the unlocking member 163 includes a first protrusion 1631, a rotating portion 1632 and a second protrusion 1633. The first convex portion 1631 is fixedly connected with the second convex portion 1633 through the rotating portion 1632, the first convex portion 1631 and the second convex portion 1633 are arranged at a preset included angle, the first convex portion 1631 abuts against the abutting curved surface 1333, the first convex portion 1631 can be driven by the abutting curved surface 1333 to rotate, the second convex portion 1633 abuts against the locking element 161, and the second convex portion 1633 can push the abutting portion 1614 of the locking element 161 to rotate.

Referring to fig. 11 and 12, the switching mechanism 140 includes a rotating shaft gear 141, a transmission member 142, a trip unit 143, a movable contact 144, and a stationary contact 145. The rotating shaft gear 141 is meshed with the final stage gear 133, and the final stage gear 133 can drive the rotating shaft gear 141 to rotate. One end of the transmission element 142 is movably connected with the rotating shaft gear 141, the other end of the transmission element is movably connected with the moving contact 144 through the tripping component 143, and the rotating shaft gear 141 rotates to drive the transmission element 142 to move, so that the moving contact 144 is driven to move through the tripping component 143. The moving contact 144 is rotatably connected in the housing 110 and selectively abuts against the fixed contact 145, the fixed contact 145 is fixedly connected in the housing 110, and the trip component 143 can drive the moving contact 144 to abut against or separate from the fixed contact 145.

It should be noted that the switching-on/off mechanism 140 includes four states, i.e., a switching-on state, a switching-off state, a normal tripping state, and a welding state. When the switching-on/off mechanism 140 is in a switching-on state, the moving contact 144 abuts against the fixed contact 145, and the circuit breaker 100 is switched on; when the switching-on/off mechanism 140 is in the switching-off state, the moving contact 144 is separated from the fixed contact 145, and the circuit breaker 100 is disconnected; when the switching-on/off mechanism 140 is in a normal tripping state, the moving contact 144 is separated from the fixed contact 145, and the tripping component 143 trips, so that the transmission component 142 is disconnected from the moving contact 144, and the circuit breaker 100 is disconnected; when the switching-on/off mechanism 140 is in a fusion welding state, the moving contact 144 and the static contact 145 are fused and cannot be separated, the tripping component 143 is tripped, so that the transmission component 142 and the moving contact 144 are disconnected, the circuit breaker 100 is disconnected, and at this time, the circuit breaker 100 breaks down and cannot work normally any more.

Fusion weld inspection mechanism 170 includes a position detector 171, an inspection pad 172, and an indicator (not shown). The position detector 171 and the detection contact 172 are both connected to the main control board 120, so that the main control board 120 can determine whether the switching mechanism 140 is in a welding state. The position detector 171 is used for detecting the position of the rotating shaft gear 141, and the detection contact 172 is used for detecting the position of the movable contact 144. The main control board 120 is connected to an indicator, which has four display states, and the four display states are respectively corresponding to the four states of the switching on/off mechanism 140 one by one, that is, when the switching on/off mechanism 140 is in a certain state, the main control board 120 controls the indicator to make a corresponding display state.

In this embodiment, the four display states of the indicator are a red light, a green light, a yellow light and a white light, and when the switching-on/off mechanism 140 is in the switching-on state, the indicator lights the green light; when the switching-on/off mechanism 140 is in the switching-off state, the indicator lights a yellow light; when the switching-on/off mechanism 140 is in a normal tripping state, the indicator lights a white lamp; when the switching on/off mechanism 140 is in the fusion welding state, the indicator lights up a red light.

It should be noted that the rotating shaft gear 141 has two extreme positions and a middle position during the rotation, wherein the two extreme positions are the closing position and the opening position respectively, when the rotating shaft gear 141 is located at the closing position, the opening and closing mechanism 140 is in the closing state, when the rotating shaft gear 141 is located at the opening position, the opening and closing mechanism 140 is in the opening state, when the rotating shaft gear 141 is located at the middle position, the releasing component 143 is released, and at this time, the opening and closing mechanism 140 is in the normal disengaging state or the welding state.

It should be noted that the position detector 171 is configured to send a first signal to the main control board 120 when the rotating shaft gear 141 is at an intermediate position between the closing position and the opening position, so as to indicate that the rotating shaft gear 141 is not at the closing position nor the opening position at this time, and the opening and closing mechanism 140 is in a normal disengaged state or a welding state. The detection contact plate 172 is used for sending a second signal to the main control board 120 when the moving contact 144 abuts against the fixed contact 145, so as to indicate that the moving contact 144 and the fixed contact 145 are connected together at this time, and the switching-on/off mechanism 140 is in a switching-on state or a welding state. The first signal and the second signal cooperate to indicate that the switching mechanism 140 is in a welding state, and the main control board 120 is configured to send out a welding alarm signal when the first signal and the second signal are received simultaneously. Specifically, the main control board 120 controls the indicator to light a red light to warn the worker.

Referring to fig. 13, the position detector 171 includes a first hall sensor 1712, a first magnetic member 1713, a second hall sensor 1714, a third hall sensor 1715, and a second magnetic member 1716. First hall sensor 1712 is installed on main control panel 120, and corresponding with the intermediate position, and first magnetic part 1713 is installed on pivot gear 141, and first hall sensor 1712 can be electrified with first magnetic part 1713 response when pivot gear 141 rotates to the intermediate position to send first signal to main control panel 120. The second hall sensor 1714 and the third hall sensor 1715 are both mounted on the main control board 120, the second magnetic member 1716 is mounted on the final gear 133, and the second hall sensor 1714 can be induced to be energized with the second magnetic member 1716 when the final gear 133 drives the rotating shaft gear 141 to rotate to the closing position, so as to send a third signal to the main control board 120; the third hall sensor 1715 can be electrically sensed with the second magnetic member 1716 when the final gear 133 drives the rotating shaft gear 141 to rotate to the open position, so as to send a fourth signal to the main control board 120.

It should be noted that, in the closing process, the main control board 120 controls the driving motor 131 to rotate forward, and drives the rotating shaft gear 141 to rotate through the gear transmission assembly 132 and the final stage gear 133, so as to drive the moving contact 144 to rotate to close the switch, when the final stage gear 133 rotates to a first preset position, the rotating shaft gear 141 rotates to a switch-on position, at this time, the second magnetic member 1716 on the final stage gear 133 and the second hall sensor 1714 are induced to get electricity, and send a third signal to the main control board 120, after receiving the third signal, the main control board 120 controls the driving motor 131 to stop operating, the final stage gear 133 and the rotating shaft gear 141 both stop rotating, and the closing action is completed.

In the switching-off process, the main control board 120 controls the driving motor 131 to rotate reversely, and drives the rotating shaft gear 141 to rotate through the gear transmission assembly 132 and the final stage gear 133, so as to drive the moving contact 144 to rotate and switch on, when the final stage gear 133 rotates to a second preset position, the rotating shaft gear 141 rotates to a switching-off position, at this time, the second magnetic part 1716 on the final stage gear 133 and the third hall sensor 1715 are induced to get electricity, and a fourth signal is sent to the main control board 120, after receiving the fourth signal, the main control board 120 controls the driving motor 131 to stop running, the final stage gear 133 and the rotating shaft gear 141 both stop rotating, and the switching-off action is completed.

Referring to fig. 14 and fig. 15 in combination, it is noted that the detecting contact 172 is fixedly installed in the housing 110, the detecting contact 172 is provided with an elastic arm 1721 extending therefrom, the moving contact 144 is provided with an extending portion 1442 having a groove 1441, the elastic arm 1721 can extend into the groove 1441 and abut against the extending portion 1442 when the moving contact 144 abuts against the stationary contact 145, so as to make the moving contact 144 and the detecting contact 172 conduct, and thus the detecting contact 172 sends a second signal to the main control board 120. Specifically, the tail of the detecting contact 172 is further provided with an L-shaped bent portion 1722, the housing 110 is provided with a slot 113, and the L-shaped bent portion 1722 is inserted into the slot 113 and is matched with the slot 113 to fix the relative position of the detecting contact 172 and the housing 110.

Referring to fig. 16 and 17, the wiring detection mechanism 180 includes a wiring board 181, a mounting bracket 182, a spring sheet 183, and a detection assembly 184. The mounting bracket 182 defines an opening 1821, and the opening 1821 is used for the wire 190 to access. The terminal block 181 is fixedly connected to the mounting bracket 182 and is disposed in the opening 1821. The elastic sheet 183 is fixedly connected with the mounting frame 182 and extends into the opening 1821, and the elastic sheet 183 can press and hold the wire 190 on the wiring board 181, so that the conduction between the wire 190 and the wiring board 181 is realized, and the wiring operation is completed. The detecting component 184 is disposed on one side of the elastic sheet 183 away from the wiring board 181, and is connected to the main control board 120. The detection component 184 is configured to detect whether a wire 190 is clamped between the elastic sheet 183 and the wiring board 181, and send a control signal to the main control board 120 when detecting that the wire 190 is not connected, so that the main control board 120 controls the opening and closing mechanism 140 to open and close.

Referring to FIGS. 18, 19 and 20 in combination, the sensing assembly 184 includes a diaphragm 1841, a rotating member 1842, a second torsion spring 1843, a first conductor 1844 and a second conductor 1845. The barrier 1841 is fixedly mounted within the housing 110 to fix the relative position of the barrier 1841 and the housing 110. The partition 1841 is provided with an installation shaft 1848, and the second torsion spring 1843 and the rotation member 1842 are both sleeved outside the installation shaft 1848 and can rotate relative to the installation shaft 1848. The rotating member 1842 abuts against the spring plate 183, and the spring plate 183 can drive the rotating member 1842 to rotate relative to the mounting shaft 1848. The first conductor 1844 and the second conductor 1845 are spaced apart from each other, fixedly connected to the partition 1841, and electrically connected to the main control board 120.

The second torsion spring 1843 is provided with a first elastic arm 1846 and a second elastic arm 1847, the first elastic arm 1846 abuts against the rotating member 1842 and the first conductive member 1844 at the same time, the second elastic arm 1847 abuts against the second conductive member 1845, the main control board 120, the first conductive member 1844, the second torsion spring 1843 and the second conductive member 1845 form a conductive path, and the main control board 120 is used for controlling the opening and closing of the opening and closing brake mechanism 140 when the conductive path is communicated. The resilient tab 183 is movable away from the connection plate 181 when the external lead 190 is connected to the main control board 120 to urge the rotating member 1842 to rotate relative to the mounting shaft 1848, thereby separating the first resilient arm 1846 from the first conductive member 1844 to open the conductive path, and allowing the switching mechanism 140 to be switched on when the conductive path is opened.

Specifically, the second torsion spring 1843 and the rotating member 1842 are coaxially disposed and both can rotate centering on the mounting shaft 1848. The rotation member 1842 is provided with a boss 1849 extending along the axial direction of the mounting shaft 1848, the first elastic arm 1846 abuts against the boss 1849, and when the rotation member 1842 rotates relative to the mounting shaft 1848, the boss 1849 applies pressure to the first elastic arm 1846 to push the first elastic arm 1846 to move and separate from the first conductive member 1844, so that the conductive path is disconnected.

It should be noted that, when the wire 190 is not inserted into the circuit breaker 100, the elastic piece 183 is close to the wiring board 181 under the action of its own elastic force and abuts against the wiring board 181, at this time, the second torsion spring 1843 is in an initial state, the first elastic arm 1846 of the second torsion spring 1843 abuts against the rotating member 1842 and the first conductive member 1844 at the same time, the second elastic arm 1847 abuts against the second conductive member 1845, the main control board 120, the first conductive member 1844, the second torsion spring 1843 and the second conductive member 1845 form a conductive path, and the main control board 120 controls the opening and closing mechanism 140 to open and close.

In the process of connecting the wire 190 into the circuit breaker 100, the wire 190 extends into the opening 1821 and is disposed between the elastic piece 183 and the wiring board 181, in the process, an external force overcomes the elastic force of the elastic piece 183 to push the elastic piece 183 away from the wiring board 181, the elastic piece 183 pushes the rotating piece 1842 to rotate relative to the mounting shaft 1848 in the movement process, the rotating piece 1842 drives the first elastic arm 1846 of the second torsion spring 1843 to rotate, so that the first elastic arm 1846 is separated from the first conductive piece 1844, while the second elastic arm 1847 is always kept in a state of abutting against the second conductive piece 1845, so that the conductive path is disconnected, the wiring is completed, and thereafter, the main control board 120 allows the closing and opening mechanism 140 to be closed.

In this embodiment, the number of the terminal plate 181, the mounting bracket 182, the spring 183, the rotating member 1842, the second torsion spring 1843 and the mounting shafts 1848 is two, the two mounting shafts 1848 are oppositely disposed on two sides of the partition 1841, and the two second torsion springs 1843 are disposed between the first conductive member 1844 and the second conductive member 1845 in parallel. Each mounting bracket 182 is provided with an opening 1821, each spring 183 can press and hold one wire 190 on one wiring board 181, and each spring 183 can drive one rotating piece 1842 to rotate.

Specifically, the main control board 120, the first conductive piece 1844, one second torsion spring 1843 and the second conductive piece 1845 form one conductive path, and the main control board 120, the first conductive piece 1844, another second torsion spring 1843 and the second conductive piece 1845 form another conductive path, which are connected in parallel. If the two conductive paths are conducted, it indicates that no conducting wire 190 is connected into the two openings 1821, the connection is not completed, and the main control board 120 controls the switching-on/off mechanism 140 to switch off; if one conductive path is on and the other conductive path is off, it indicates that a wire 190 is connected into one opening 1821, and the wire 190 is not connected into the other opening 1821, and the connection is not completed, the main control board 120 controls the switching-on/off mechanism 140 to switch off; if the two conductive paths are disconnected, it is indicated that the two openings 1821 are connected with the wires 190, and the main control board 120 allows the switching-on/switching-off mechanism 140 to be switched on.

In this embodiment, since the circuit breaker 100 employs the fusion welding detection mechanism 170 and the wiring detection mechanism 180 connected to the main control board 120 and the locking mechanism 160 in transmission connection with the electric operating mechanism 130, the circuit breaker 100 can be prevented from being pulled out from the cabinet when being switched on, and the circuit breaker has a contact fusion welding detection function and a wiring detection function, which is convenient and practical and has high safety.

With continued reference to fig. 1, 2, and 3, it is noted that the circuit breaker 100 further includes an energy metering module 200, and the energy metering module 200 is mounted within the housing 110. The power metering module 200 is used for metering the power passed by the circuit breaker 100, i.e. measuring the power consumption or the power supply.

The electric energy metering module 200 is installed in the outer shell 110, the outer shell 110 is further provided with a wire inlet port 115, the wire inlet port 115 and the wire outlet port 111 are oppositely arranged at two ends of the outer shell 110, and the electric energy metering module 200 is arranged between the wire outlet port 111 and the wire inlet port 115 and is connected with the main control board 120. In this embodiment, the electric energy metering module 200 is a current detecting element, and the electric energy metering module 200 is configured to detect a passing current to meter electric energy, specifically, the electric energy metering module 200 can output a voltage signal to the main control board 120, so as to implement a function of the circuit breaker 100 for electric energy metering.

Referring to fig. 21, it is noted that the circuit breaker 100 further includes a voltage detection module 210, and the voltage detection module 210 is installed in the housing 110. The voltage detection module 210 is used for controlling the circuit breaker 100 to be in a switching-off state to cut off the power when determining that the circuit breaker 100 has a power connection error, so as to prevent a power distribution system from being damaged, avoid safety accidents and improve the safety of the circuit breaker 100.

The voltage detection module 210 includes a first detection terminal 211, a second detection terminal 212, and a power common terminal 213. The first detection terminal 211, the second detection terminal 212 and the power supply common terminal 213 are electrically connected to the main control board 120, the first detection terminal 211 and the power supply common terminal 213 are used for detecting a main voltage between two terminals of a main power supply (not shown), and the second detection terminal 212 and the power supply common terminal 213 are used for detecting a standby voltage between two terminals of a standby power supply (not shown). The main control board 120 is configured to control the switching mechanism 140 when the main voltage and the standby voltage do not satisfy a preset switching condition, that is, when a power connection is wrong, so as to ensure that the switching mechanism 140 is in a switching-off state. In this embodiment, the power supply common terminal 213 may be a ground potential or other potential, and the potential of the power supply common terminal 213 is not limited.

Specifically, the main control board 120 can calculate a difference between the two potentials according to the potential detected by the first detection terminal 211 and the potential detected by the power supply common terminal 213, where the difference is a main voltage between the two terminals of the main power supply. Similarly, the main control board 120 can calculate the backup voltage between the two ends of the backup power supply according to the potential detected by the second detection terminal 212 and the potential detected by the power supply common terminal 213.

It should be noted that, after the main voltage and the standby voltage are determined, the main control board 120 can determine whether the main voltage and the standby voltage meet a preset switching condition, if yes, the circuit breaker 100 normally operates, and if not, the switching mechanism 140 is controlled to ensure that the switching mechanism 140 is in a switching state. In this embodiment, the preset closing condition includes two conditions: first, the difference between the primary voltage and the backup voltage is less than or equal to a voltage threshold; and secondly, the voltage polarities of the main power supply and the standby power supply are the same. As long as one of the conditions is satisfied, the circuit breaker 100 will normally operate even if the preset closing condition is satisfied.

Specifically, in the process of determining whether the main voltage and the standby voltage satisfy the preset switching-on condition, the main control board 120 needs to calculate a voltage difference between the main voltage and the standby voltage, and then compare the voltage difference with a voltage threshold. If the voltage difference is less than or equal to the voltage threshold, it indicates that the circuit breaker 100 has no wiring error, and the current main voltage and the standby voltage meet the preset switching-on condition, so that the circuit breaker 100 can normally operate.

However, if the voltage difference is greater than the voltage threshold, it may be determined again whether the phase polarities of the voltages of the main power supply and the backup power supply are reversed, that is, whether the positive and negative of the calculated main voltage and the backup voltage are the same, if the main voltage calculated according to the potential detected by the first detection terminal 211 and the potential detected by the power supply common terminal 213 is a positive number, and the backup voltage calculated according to the potential detected by the second detection terminal 212 and the potential detected by the power supply common terminal 213 is a negative number, it is determined that the polarities of the main power supply and the backup power supply are reversed, at this time, it may be determined that the circuit breaker 100 has a wiring error, and the main control board 120 controls the switching mechanism 140 to be in and maintain the switching state. On the contrary, if the main voltage and the standby voltage are both positive numbers or both negative numbers, it is indicated that the voltage polarities of the main power supply and the standby power supply are in the same direction, and at this time, it can be determined that the circuit breaker 100 has no wiring error, and the current main voltage and the standby voltage meet the preset switching-on condition, so that the circuit breaker 100 can normally work.

In this embodiment, the first detecting terminal 211 is disposed on the moving contact 144 to conveniently and quickly detect the potential of the main power source when the circuit breaker 100 is in an open state or a close state, and the second detecting terminal 212 is disposed on the stationary contact 145 to detect the potential of the standby power source at any time.

Referring to fig. 22, it is noted that the circuit breaker 100 further includes a temperature detection module 220, and the temperature detection module 220 is installed in the housing 110. The temperature detection module 220 is used for controlling the circuit breaker 100 to be in an open state to cut off the power when the temperature is determined to be abnormal, so as to avoid the occurrence of safety accidents and further improve the safety of the circuit breaker 100.

The temperature detection module 220 includes a first temperature sensor 221, a second temperature sensor 222, and a current detector 223. The circuit breaker 100 is provided with a conductive bar (not shown) for connection with a load device (not shown), and the first temperature sensor 221, the second temperature sensor 222, and the current detector 223 are electrically connected with the main control board 120. Both the first temperature sensor 221 and the current detector 223 are connected to the conductive strip, the first temperature sensor 221 is used for detecting the temperature of the conductive strip, and the current detector 223 is used for detecting the passing current of the conductive strip, i.e. the current of the load device. The second temperature sensor 222 is disposed in the housing 110, and the second temperature sensor 222 is used for detecting the temperature of the air inside the housing 110. The main control board 120 is configured to control the switching mechanism 140 when the current of the conductive bar, the temperature of the conductive bar, and the temperature of the air inside the housing 110 do not satisfy a preset logic range, so as to ensure that the switching mechanism 140 is in a switching state.

It should be noted that after determining the temperature of the conductive bar, the current of the load device, and the temperature of the air inside the housing 110, the main control board 120 can determine whether the three parameters meet a preset logic range, that is, determine whether the temperature of the conductive bar is abnormal, if yes, the circuit breaker 100 operates normally, and if not, the closing and opening mechanism 140 is controlled to ensure that the closing and opening mechanism 140 is in the opening state.

Specifically, the main control board 120 can receive the temperature of the conductive bar sent by the first temperature sensor 221, the temperature of the air inside the housing 110 sent by the second temperature sensor 222, and the current of the load device sent by the current detector 223, and calculate the temperature increase amount of the conductive bar according to the current of the load device, so that the theoretical temperature of the conductive bar can be calculated according to the temperature of the air inside the housing 110 and the temperature increase amount, and then compare the theoretical temperature with the detected temperature of the conductive bar, and further determine whether the temperature of the conductive bar is abnormal according to the comparison result.

Further, if the temperature of the conductive bar is much higher than the theoretical temperature, it may be determined that the temperature of the conductive bar is abnormal, and at this time, the current of the conductive bar, the temperature of the conductive bar, and the temperature of the air inside the housing 110 do not satisfy the preset logic range, and the main control board 120 controls the opening and closing mechanism 140 to be in and maintain the opening and closing state; if the temperature of the conductive bar is the same as or similar to the theoretical temperature, it can be determined that the temperature of the conductive bar is normal, and at this time, the current of the conductive bar, the temperature of the conductive bar, and the temperature of the air inside the case 110 satisfy the preset logic range, so that the circuit breaker 100 can normally operate.

Referring to fig. 23, it is noted that the circuit breaker 100 further includes an address acquisition module 230, and the address acquisition module 230 is installed in the housing 110. The address acquisition module 230 is configured to adaptively acquire a communication address of the circuit breaker 100, so that manual debugging of the communication address is not required, the debugging cost of the circuit breaker 100 is reduced, and communication between the circuit breaker 100 and a power distribution device (not shown) is effectively ensured.

The address acquisition module 230 includes a first power interface 231, a first address identification interface 232, and a first communication interface 233. The main control board 120 includes a control unit 121 and a communication unit 122, the control unit 121 is connected to the communication unit 122, the control unit 121 is respectively connected to a first power interface 231 and a first address identification interface 232, and the communication unit 122 is respectively connected to the first power interface 231 and a first communication interface 233.

It should be noted that the circuit breaker 100 is installed in the cabinet 240, and the cabinet 240 is provided with a communication line (not shown) for connecting a power distribution device (not shown), so that when the circuit breaker 100 is connected to the cabinet 240, the circuit breaker 100 can communicate with the power distribution device through the communication line on the cabinet 240.

The communication address of the circuit breaker 100 needs to be obtained before the circuit breaker 100 communicates information with the power distribution equipment. In the prior art, each circuit breaker 100 can be configured with a communication address through software. However, the configuration of the communication address by software means all causes the manual debugging cost of the circuit breaker 100 to be high, and at the same time, once the circuit breaker 100 is replaced, the unused address needs to be identified again, otherwise, the communication between the circuit breaker 100 and the power distribution equipment is affected.

In this embodiment, the circuit breaker 100 can adaptively acquire the communication address of the circuit breaker 100 after being connected to the cabinet 240 and powered on, and after acquiring the communication address of the circuit breaker 100, the communication address of the circuit breaker 100 can be further transmitted to the power distribution equipment through a communication line on the cabinet 240. When the power distribution system works for the first time, the power distribution equipment can acquire the communication addresses of the circuit breakers 100 connected to the cabinet 240 in an automatic polling mode, automatically record existing equipment, reduce communication times, improve effective communication efficiency, and timely give an alarm when the slave equipment breaks down or fails in communication. In the power distribution system, after the power distribution equipment acquires the communication address of the circuit breaker 100 through the communication line on the cabinet 240, the corresponding circuit breaker 100 automatically analyzes and feeds back information required by the power distribution equipment in the power distribution system according to a protocol, so as to realize interconnection and intercommunication between the circuit breaker 100 and the power distribution equipment.

The first power interface 231 is used for being connected with a power supply through the second power interface of the cabinet 240, the first power interface 231 is connected with the first address identification interface 232, and the control unit 121 and the communication unit 122 are respectively connected with the first power interface 231. The control unit 121 is connected to a first address identification interface 232, and the first address identification interface 232 is used for connecting to a second address identification interface of the cabinet 240. Control unit 121 is also coupled to first communication interface 233 via communication unit 122, and first communication interface 233 is adapted to be coupled to a communication line of cabinet 240 via a second communication interface of cabinet 240.

The control unit 121 is configured to, when the first address identification interface 232 is connected to the second address identification interface, sample a voltage signal at a connection position between the first address identification interface 232 and the second address identification interface, determine a communication address of the circuit breaker 100 according to the voltage signal obtained by the sampling, and control the communication unit 122 to communicate with the power distribution equipment through the communication line according to the communication address.

In this embodiment, the first power interface 231 may be a plug-in interface, and correspondingly, the second power interface on the cabinet 240 may be a plug-in interface matched with the first power interface 231, and the first power interface 231 of the circuit breaker 100 is connected to the second power interface on the cabinet 240 in a plug-in manner. The first address identification interface 232 may be the same type as the second address identification interface on the cabinet 240, that is, the first address identification interface 232 and the second address identification interface are the same type of identification interfaces matched with each other. First communication interface 233 may be of the same type as the second communication interface on cabinet 240, i.e. first communication interface 233 and the second communication interface are the same type of communication interface that matches each other.

When the circuit breaker 100 is connected to the cabinet 240, the first power interface 231 in the circuit breaker 100 may further be connected to a second power interface on the cabinet 240, and when the first power interface 231 is connected to the second power interface on the cabinet 240, the power supply may sequentially pass through the second power interface and the first power interface 231 to respectively supply power to the control unit 121 and the communication unit 122.

When the circuit breaker 100 is connected to the cabinet 240, the first address identification interface 232 in the circuit breaker 100 can also be connected to a second address identification interface on the cabinet 240, and the first communication interface 233 on the circuit breaker 100 can be connected to a second communication interface on the cabinet 240. The first power interface 231 is also connected to the first address identification interface 232 to provide power to the connection location of the first address identification interface 232 and the second address identification interface to trigger the connection location to generate a voltage signal.

When the circuit breaker 100 is connected to the cabinet 240, the first address identification interface 232 of the circuit breaker 100 is connected to the second address identification interface of the cabinet 240, and the control unit 121 may sample a voltage signal at the connection position, determine a communication address of the circuit breaker 100 according to the sampled voltage signal, and control the communication unit 122 to communicate with the power distribution equipment through a communication line on the cabinet 240 according to the communication address.

It should be noted that the control unit 121 may perform calculation by using a preset address calculation formula according to the voltage value of the voltage signal obtained by sampling, to obtain the communication address of the circuit breaker 100, where the address calculation formula includes a calculation formula of a corresponding relationship between the voltage value and the address. Specifically, to adjust the granularity of the communication address of the circuit breaker 100, the control unit 121 can determine the communication address of the circuit breaker 100 according to the sampled voltage signal and a preset coefficient, wherein the control unit 121 determines the communication address of the circuit breaker 100 according to the product of the voltage value of the sampled voltage signal and the preset coefficient.

The embodiment of the utility model provides a circuit breaker 100, main control board 120, electric operating mechanism 130, switching on and switching off mechanism 140 and arc extinguishing mechanism 150 all set up in the installation space layer 114 of shell 110 for main control board 120, electric operating mechanism 130, switching on and switching off mechanism 140 and arc extinguishing mechanism 150 are located same space layer, and main control board 120 and electric operating mechanism 130 set up in one side that switching on and switching off mechanism 140 kept away from arc extinguishing mechanism 150. Compared with the prior art, the utility model provides a circuit breaker 100 can realize the remote control of divide-shut brake to occupation space is little, integrates the degree height, can realize circuit breaker 100's structural optimization, and the circuit breaker 100's of being convenient for wire is arranged, improves circuit breaker 100's wholeness ability.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The circuit breaker is characterized by comprising a shell, a main control board, an electric operating mechanism, a switching-on/off mechanism and an arc extinguishing mechanism, wherein the main control board, the electric operating mechanism, the switching-on/off mechanism and the arc extinguishing mechanism are arranged in the shell;

an installation space layer is arranged in the shell;

the main control board, the electric operating mechanism, the switching-on/off mechanism and the arc extinguishing mechanism are all arranged in the installation space layer, the main control board and the electric operating mechanism are all arranged on one side of the switching-on/off mechanism, and the arc extinguishing mechanism is arranged on the other side opposite to the switching-on/off mechanism;

the electric operating mechanism is connected with the switching-on/off mechanism, the switching-on/off mechanism is connected with the arc extinguishing mechanism, the electric operating mechanism is connected with the main control board, and the electric operating mechanism is used for driving the switching-on/off mechanism to switch on or off under the control of the main control board.

2. The circuit breaker of claim 1, wherein the electric operating mechanism comprises a driving motor, a gear transmission assembly and a final gear, the driving motor, the gear transmission assembly and the final gear are all installed in the installation space layer, the driving motor is connected with the final gear through the gear transmission assembly, the final gear is connected with the switching on/off mechanism, and the driving motor, the gear transmission assembly, the final gear, the switching on/off mechanism and the arc extinguishing mechanism are arranged in sequence.

3. The circuit breaker of claim 2, wherein the main control board is stacked with the driving motor.

4. The circuit breaker of claim 2, further comprising a locking mechanism, a weld detection mechanism, and a wire connection detection mechanism;

the locking mechanism is in transmission connection with the final-stage gear, is arranged above the final-stage gear, and is used for locking the shell in a cabinet when the switching-on/off mechanism is switched on and also used for unlocking the shell from the cabinet when the switching-on/off mechanism is switched off;

the fusion welding detection mechanism is selectively contacted with the switching-on/off mechanism and is connected with the main control board, and the fusion welding detection mechanism is used for sending a fusion welding alarm signal to the main control board when fusion welding faults of the switching-on/off mechanism are detected;

the wiring detection mechanism with the main control board is connected, the shell is provided with the outgoing line port, the position of wiring detection mechanism with the position of outgoing line port is corresponding, wiring detection mechanism be used for when detecting not inserting the wire to the main control board sends control signal, the main control board is used for receiving control signal is right during the time the switching on/off brake mechanism controls, in order to guarantee switching on/off brake mechanism is in the separating brake state.

5. The circuit breaker according to claim 4, wherein the final gear comprises a matching tooth portion and a transmission tooth portion which are coaxially arranged and fixedly connected, the transmission tooth portion is provided with a contact curved surface along a circumferential direction thereof, the matching tooth portion is matched with the gear transmission assembly, the transmission tooth portion is matched with the opening and closing mechanism, and the contact curved surface is contacted with the locking mechanism.

6. The circuit breaker of claim 5, wherein the gear assembly comprises a worm, a first gear and a second gear, the first gear and the second gear are both rotatably connected within the housing, the first gear comprises a coaxially disposed and fixedly connected worm gear portion and a first tooth portion, the second gear comprises a coaxially disposed and fixedly connected second tooth portion and a third tooth portion, the worm is fixedly connected to the output shaft of the driving motor and is engaged with the worm gear portion, the first tooth portion is engaged with the second tooth portion, and the third tooth portion is engaged with the mating tooth portion.

7. The circuit breaker of claim 5, wherein the locking mechanism comprises a latch member, a first torsion spring, and an unlocking member, the housing defines a through-hole, the latch member is mounted within the housing, and can rotate relative to the shell, the locking fastener can extend out of the through hole and is buckled with the cabinet, the first torsion spring is arranged on the shell, one end of the unlocking piece is abutted against the locking piece, the unlocking piece is rotatably connected in the shell, one end of the unlocking piece is abutted against the abutting curved surface, the other end of the unlocking piece is abutted against the locking piece, the unlocking piece can rotate relative to the shell under the drive of the final-stage gear, so as to drive the locking fastener to overcome the elasticity of the first torsion spring to rotate relative to the shell, and further to ensure that the locking fastener is separated from the cabinet and retracts into the through hole.

8. The circuit breaker according to claim 7, wherein the locking member includes a rotation shaft, a connecting portion, a locking portion and a supporting portion, the rotation shaft, the locking portion and the supporting portion are all fixedly connected to the connecting portion, the rotation shaft and the supporting portion are disposed at two ends of the connecting portion, the rotation shaft extends into the housing and can rotate relative to the housing, the supporting portion is supported by the unlocking member, the locking portion and the first torsion spring are disposed at two sides of the connecting portion, the locking portion is engaged with the through hole, and the first torsion spring is supported by the connecting portion.

9. The circuit breaker according to claim 7, wherein the unlocking member comprises a first protrusion, a rotating portion and a second protrusion, the first protrusion is fixedly connected with the second protrusion through the rotating portion, the first protrusion and the second protrusion are arranged at a predetermined included angle, the first protrusion abuts against the abutting curved surface, and the second protrusion abuts against the locking member.

10. The circuit breaker according to claim 4, wherein the switching mechanism comprises a rotating shaft gear, a transmission member, a tripping assembly, a moving contact and a fixed contact, the rotating shaft gear is engaged with the final stage gear, one end of the transmission member is movably connected with the rotating shaft gear, the other end of the transmission member is movably connected with the moving contact through the tripping assembly, the moving contact is rotatably connected in the housing and selectively abutted against the fixed contact, and the fixed contact is fixedly connected in the housing.

11. The circuit breaker of claim 10, wherein the fusion welding detection mechanism comprises a position detector and a detection contact, the position detector and the detection contact are both connected to the main control board, the position detector is configured to send a first signal to the main control board when the shaft gear is at an intermediate position between a closing position and an opening position, the detection contact is configured to send a second signal to the main control board when the movable contact abuts against the fixed contact, and the main control board is configured to send a fusion welding alarm signal when the first signal and the second signal are received at the same time.

12. The circuit breaker of claim 11, wherein the position detector comprises a first hall sensor and a first magnetic member, the first hall sensor is mounted on the main control board and corresponds to the middle position, the first magnetic member is mounted on the rotating shaft gear, and the first hall sensor can be electrically induced by the first magnetic member when the rotating shaft gear rotates to the middle position, so as to send the first signal to the main control board.

13. The circuit breaker of claim 12, wherein the position detector further comprises a second hall sensor, a third hall sensor, and a second magnetic member, the second hall sensor and the third hall sensor are both mounted on the main control board, the second magnetic member is mounted on the final gear, the second hall sensor is capable of sensing power with the second magnetic member when the final gear drives the rotating shaft gear to rotate to the closing position, so as to send a third signal to the main control board, and the third hall sensor is capable of sensing power with the second magnetic member when the final gear drives the rotating shaft gear to rotate to the opening position, so as to send a fourth signal to the main control board.

14. The circuit breaker as claimed in claim 11, wherein the detecting contact is fixedly installed in the housing, the detecting contact is extended with a resilient arm, the moving contact is provided with a protrusion having a groove, the resilient arm is capable of extending into the groove when the moving contact abuts against the fixed contact and abuts against the protrusion, so as to conduct the moving contact and the detecting contact, thereby enabling the detecting contact to send the second signal to the main control board.

15. The circuit breaker according to claim 4, wherein the wiring detection mechanism comprises a wiring board, a mounting frame, an elastic sheet and a detection assembly, the mounting frame is provided with an opening, the wiring board is fixedly connected with the mounting frame and arranged in the opening, the elastic sheet is fixedly connected with the mounting frame and extends into the opening, the elastic sheet can press and hold the wire on the wiring board, the detection assembly is arranged on one side of the elastic sheet, which is far away from the wiring board, and is connected with the main control board, and the detection assembly is used for detecting whether the wire is clamped between the elastic sheet and the wiring board.

16. The circuit breaker according to claim 15, wherein the detecting assembly comprises a partition plate, a rotating member, a second torsion spring, a first conductive member and a second conductive member, the partition plate is provided with an installation shaft, the second torsion spring and the rotating member are both sleeved outside the installation shaft and can rotate relative to the installation shaft, the rotating member abuts against the elastic piece, the first conductive member and the second conductive member are arranged at intervals and are both fixedly connected to the partition plate and are both electrically connected to the main control board, the second torsion spring is provided with a first elastic arm and a second elastic arm, the first elastic arm abuts against the rotating member and the first conductive member respectively, the second elastic arm abuts against the second conductive member, and the main control board, the first conductive member, the second torsion spring and the second conductive member form a conductive path, the elastic sheet can move in the direction far away from the wiring board when being externally connected with the lead so as to push the rotating piece to rotate relative to the mounting shaft, so that the first elastic arm is driven to be separated from the first conductive piece, the conductive path is disconnected, and the main control board is used for controlling the switching-on and switching-off mechanism to switch off when the conductive path is communicated.

17. The circuit breaker according to claim 16, wherein the number of the wiring board, the mounting bracket, the resilient plate, the rotating member, the second torsion spring and the mounting shafts is two, two mounting shafts are oppositely disposed on two sides of the partition, and two second torsion springs are disposed in parallel between the first conductive member and the second conductive member.

18. The circuit breaker of claim 1, further comprising an electric energy metering module connected to the main control board, the electric energy metering module configured to detect a passing current to meter the electric energy.

19. The circuit breaker according to claim 1, wherein the circuit breaker further comprises a voltage detection module, the voltage detection module comprises a first detection end, a second detection end and a power supply common end, the first detection end, the second detection end and the power supply common end are electrically connected to the main control board, the first detection end and the power supply common end are used for detecting a main voltage between two ends of a main power supply, the second detection end and the power supply common end are used for detecting a standby voltage between two ends of a standby power supply, and the main control board is used for controlling the switching mechanism when the main voltage and the standby voltage do not satisfy a preset switching condition, so as to ensure that the switching mechanism is in a switching state.

20. The circuit breaker according to claim 1, wherein the circuit breaker further comprises a temperature detection module, the temperature detection module comprises a first temperature sensor, a second temperature sensor and a current detector, the circuit breaker is provided with a conductive bar for connecting with a load device, the first temperature sensor, the second temperature sensor and the current detector are all electrically connected with the main control board, the first temperature sensor and the current detector are all connected with the conductive bar, the second temperature sensor is installed in the housing, the second temperature sensor is used for detecting the temperature of the air inside the housing, the main control board is used for controlling the opening and closing mechanism when the current of the conductive bar, the temperature of the conductive bar and the temperature of the air inside the housing do not satisfy a preset logic range, so as to ensure that the switching-on and switching-off mechanism is in a switching-off state.

21. The circuit breaker of claim 1, further comprising an address acquisition module, wherein the address acquisition module comprises a first power interface, a first address identification interface, and a first communication interface, the first power interface is configured to be connected to a power supply through a second power interface of a cabinet, the first power interface is connected to the first address identification interface, the main control board is connected to the first power interface, the main control board is connected to the first address identification interface, the first address identification interface is configured to be connected to a second address identification interface of a cabinet, the main control board is connected to the first communication interface, the first communication interface is configured to be connected to a communication line of the cabinet through a second communication interface of the cabinet, and the main control board is configured to, when the first address identification interface is connected to the second address identification interface, sampling voltage signals of the connecting positions of the first address identification interface and the second address identification interface, determining a communication address of the circuit breaker according to the voltage signals obtained by sampling, and communicating with power distribution equipment according to the communication address and through the communication line.

22. The circuit breaker according to claim 21, wherein the main control board comprises a control unit and a communication unit, the control unit is connected to the communication unit, the control unit is respectively connected to the first power interface and the first address identification interface, and the communication unit is respectively connected to the first power interface and the first communication interface.