899results about "Switching device condition indication" patented technology

The present disclosure relates to a circuit breaker having an energy releasing mechanism of an opening / closing mechanism part, and a circuit breaker according to an embodiment of the present invention comprises: an input latch locking device rotatably formed to restrict or release an input latch according to rotating angles thereof; an interlock movement rail which is installed on a cradle and in which an inspection position, a preparation position, and a driving position are configured; an interlock member for operating at least one among the input latch and a trip latch in a section excluding the inspection position, the preparation position, and the driving position while vertically moving in association with a relative movement of the interlock movement rail; and at least one link member connected between the interlock member and the input latch locking device and switching a linear movement in a vertical direction of the interlock member to a rotation movement, thereby rotating the input latch locking device.

The invention discloses a molded case circuit breaker, which comprises a shell, and an electric operating mechanism is arranged in the shell. The electric operating mechanism comprises a moving contact action assembly with a rotating block and a shifting rod, a sliding block which is arranged on the shell in a sliding manner and can drive the shifting rod to shift, an operating shaft which can drive the sliding block to slide and is provided with an operating hole site, and a motor speed reduction assembly which can drive the operating shaft to rotate, and the operating shaft is in linkage connection with a shifting shaft block; the sliding block is provided with a matching groove corresponding to the shifting shaft block, the operation shaft rotates to drive the shifting shaft block to shift in the matching groove so as to drive the sliding block to slide, the shell is provided with a cover plate capable of shielding the operation hole position in a sliding mode, and the shell is further provided with a rotating lock and a tripping button located on one side of the rotating lock. By arranging the locking microswitch, the manual microswitch, the first microswitch and the second microswitch, signal feedback of a manual operation state, a rotating lock locking state and a current circuit breaker state can be realized.

The present disclosure provides an indication device for a stored-energy electric operating mechanism of a circuit breaker, and a circuit breaker. The indication device includes a mounting bracket (1); an indicator (2) movably connected to the mounting bracket (1); and an indicator linkage rod (3) movably connected to the mounting bracket (1). A first reset member (4) is connected between the indicator (2) and the mounting bracket (1), and a second reset member (5) is connected between the mounting bracket (1) and the indicator linkage rod (3). The indicator linkage rod (3) and the indicator (2) are linked through a linkage structure. For the indication device according to the present disclosure, when the circuit breaker is opened and the indicator linkage rod (3) moves to an open state position, the indicator (2) is automatically reset to an "OFF" indication state position by the first reset member (4); when the circuit breaker is closed and the indicator linkage rod (3) is automatically reset from the open state position to a closed state position under action of the second reset member (5), the indicator linkage rod (3) drives the indicator (2) from the "OFF" indication state position to an "ON" indication state position through the linkage structure.

The invention discloses a multipath load control acquisition device and system and a load control acquisition method, the device adopts an architecture in which a master device and a slave device cooperate, the master device comprises a master controller, a master communication module, a user display interface and a master interface unit, and the slave device comprises a slave interface unit, a slave controller, an acquisition unit and a slave communication module. Flexible marshalling management is achieved by distributing electronic identity numbers to the breakers, load parameters and the states of the breakers are synchronously collected through the collection unit, a two-way data transmission channel is constructed by means of the master-slave communication module, a control signal is generated based on preset logic and real-time data through the master controller, and the state of the breakers is controlled. And the slave controller issues an instruction to drive the circuit breaker electric operation mechanism to realize millisecond-level rapid switching-on and switching-off operation. According to the invention, the problems of insufficient number of loops, lack of state monitoring, slow response and the like of an existing load control system are solved, and accurate, rapid and intelligent management of multi-path loads on a client side is realized.

A test switch assembly for testing electrical switchboard devices is provided. The test switch assembly includes a test switch including a handle, the handle having a first color. The handle includes a label holder including a front, the label holder defining a label slot in the front, the label slot sized to receive a label. The handle further includes a handle body extending from the label holder and defining a tie bar aperture sized to receive a tie bar configured to connect the test switch with one or more other test switches in the test switch assembly. The test switch assembly further includes an indicator coupled with the handle body of the test switch, the indicator having a second color different from the first color, the indicator exposing the tie bar aperture.

The invention belongs to the field of switch state indicating devices, and particularly provides a circuit breaker opening and closing indicating structure, a circuit breaker and a switch cabinet. According to the indicating structure, the limiting hole is formed in the mechanism box body, the stroke of the opening and closing indicating piece is limited through the limiting hole, and the opening and closing indicating piece is limited at the correct indicating position. Meanwhile, the elastic piece is connected to the driving mechanism for driving the opening and closing indicating piece to swing, the stroke of the output shaft of the circuit breaker is compensated through deformation of the elastic piece, and normal opening and closing of the circuit breaker are guaranteed. The circuit breaker comprises the indication structure. The switch cabinet comprises the circuit breaker.

The invention relates to the technical field of leakage protectors, in particular to a leakage protector convenient to install and capable of using electricity safely, which comprises a leakage protector main body, a plurality of wire inlet holes used for connecting wires are formed in the outer side of the top of the leakage protector main body, and binding mechanisms are fixed to the tops and the bottoms of the outer sides of the wire inlet holes. The binding mechanism comprises a supporting plate, two connecting rods are rotationally arranged at one end of the supporting plate, and a rubber wheel is rotationally arranged between the two connecting rods. According to the electric leakage protector, the pulling resistance of the wire is increased through the two rubber wheels, the phenomenon that the wire is pulled off is reduced, when the wire is pulled by large force to move, a copper wire of the wire moves into the elastic bag, an electric shock accident is prevented, and the use safety of the electric leakage protector is improved; and meanwhile, the rubber wheel rotates and winds the traction belt along with the movement of the wire, the traction belt pulls the elastic bag to tension the outer side of the elastic bag, and a user observes the tensioning phenomenon of the elastic bag to conveniently check whether the wire is pulled out of the mounting position.

The utility model discloses a switch-on and switch-off state monitoring module of an external circuit breaker of an electric energy meter, which comprises a shell, a rotating body, a circuit board, a position sensing device and an electric actuating mechanism used for controlling switch-on and switch-off of the circuit breaker are arranged in the shell, and the rotating body is in transmission connection with the electric actuating mechanism. The position sensing device comprises a first position sensing unit arranged on the rotating body and two second position sensing units arranged on the circuit board, and the first position sensing unit can move between the positions matched with the two second position sensing units to sense along with rotation of the rotating body. And when the circuit breaker is in an opening state and a closing state, the first position sensing unit is respectively located at positions correspondingly sensed by the two second position sensing units. The device can be integrated on the external circuit breaker of the electric energy meter, and has the advantages of simple and compact structure and high reliability.

The invention provides an inflatable cabinet rigid interlocking structure with grounding feed quantity indication, which belongs to the technical field of gas insulated metal-enclosed switchgear and comprises a cabinet body, a front door opening limiter, a front and rear door interlocking part, a three-position switch and a circuit breaker interlocking mechanism. The front door opening limiter is arranged at the front end of the cable chamber and used for limiting opening and closing of the front cabinet door. The front and rear door interlocking member is used for interlocking control of the front cabinet door and the rear cabinet door. The three-position switch is arranged on the cabinet body, and a disconnecting link of the three-position switch is linked with the front and rear door interlocking piece through a grounding interlocking piece; and the circuit breaker interlocking mechanism is arranged on the cabinet body and is respectively linked with the front door opening limiter and the three-position switch. During operation, the three-position switch and the authority of the front door opening limiter can be unlocked through opening of the circuit breaker interlocking mechanism; after the three-position switch is grounded, the front and rear door interlocking piece is unlocked through the grounding interlocking piece; the front door opening limiter is operated to open the front cabinet door, and the front and rear door interlocking piece can be triggered to open the rear cabinet door. According to the invention, the operation safety and reliability of the gas-insulated switchgear are comprehensively improved.

The invention provides a circuit breaker leakage protection indicating device, which comprises a shell, a first locking structure and a second locking structure, and is characterized in that the first locking structure comprises a first lock catch and a jump pin which are rotationally arranged and keep locking fit through an elastic structure; the second locking structure comprises a second lock catch, an indicating piece and an elastic reset piece. The indicating piece is driven by the operating mechanism to be away from the window and is locked with the second lock catch. When the electric leakage tripping structure is triggered, the first lock catch and the jump pin are driven to be unlocked, then the second lock catch unlocks the indicating piece through the jump pin, the indicating piece is automatically reset under the action of the elastic reset piece and is displayed on the window, and the jump pin synchronously drives the operating mechanism to be tripped. According to the electric leakage protection indicating device, double insurance is formed through a two-stage locking and tripping linkage mechanism, the two-stage locking is mutually restricted and triggered layer by layer, it is ensured that an indicating action strictly corresponds to an electric leakage fault, and the technical purposes of accurate indication of the electric leakage fault, automatic and error-free action, stable structure and interference resistance are achieved.

The invention relates to the technical field of circuit breakers, in particular to a circuit breaker state indication structure and a circuit breaker, and the structure comprises a jump buckle, a lock buckle and an indication member which are different in color. In the switching-on state, the jump pin and the lock catch are locked and matched, and the jump pin moves to push the indicating piece, so that the lock catch moves to the position below the window to display the switching-on state. In the opening state, the jump pin and the lock catch are locked and matched, the lock catch moves to be separated from the lower part of the window, and the jump pin moves to push the indicating piece, so that the indicating piece slides to the lower part of the window to display the opening state; in the tripping state, the jump pin and the lock catch are unlocked, the lock catch moves to be separated from the position below the window, and the jump pin moves to the position below the window so as to display the tripping state. According to the application, a special state indicating piece is reduced, the transmission relation is simplified, and the display of three states is completed through the jump pin, the lock catch and the indicating piece, so that the transmission stability of each component is improved, the overall thickness of the indicating structure is reduced, and the three states of the circuit breaker are conveniently and accurately distinguished.

The invention provides an electromagnetic leakage protection circuit breaker which comprises a shell, a shell cover, a short-circuit protection unit installed on the shell, a test device, a contact assembly and an operation device used for opening or closing the circuit breaker, and further comprises a leakage protection unit. The electric leakage protection unit comprises an electric leakage tripping mechanism and a transmission assembly which is in transmission fit with the operating mechanism, the electric leakage tripping mechanism comprises a base, an electromagnetic tripper, a tripping rod, a buckle plate, a spring seat, a positioning piece and a reset piece which are installed in the second cavity, and the base is provided with a first connecting column which is in pivot fit with the tripping rod; the base is provided with a second connecting column which is pivoted and matched with the reset piece and located below the first connecting column, the tripping rod is provided with a first limiting groove, the reset piece is sleeved with a first torsional spring, one end of the first torsional spring is located in the first limiting groove and abuts against the inner wall of the first limiting groove, and the other end of the first torsional spring abuts against the end of the reset piece. According to the electric leakage tripping mechanism, all parts are uniformly stressed, and tripping is stable.

The invention discloses a circuit breaker switch and intelligent detection system with real-time detection, which comprises a circuit breaker body, a contact system, an arc extinguishing system and an operating mechanism are arranged in the circuit breaker body, the contact system comprises a moving contact and a static contact, the bottom of the moving contact is fixedly connected with a bimetallic strip through a soft connecting line, and the bimetallic strip is fixedly connected with the arc extinguishing system through the soft connecting line. The invention relates to the technical field of circuit breakers. According to the circuit breaker switch with the real-time detection function and the intelligent detection system, a bimetallic strip is connected to the bottom of a moving contact, one end of the bimetallic strip is connected with a connecting piece made of a copper-molybdenum composite material, a box body made of red copper is installed at the bottom of the connecting piece, tin-bismuth alloy is injected into the box body, a heat pipe is attached to the bottom of the box body, and heat dissipation fins are installed at one end of the heat pipe. And the copper-molybdenum composite material connecting sheet has extremely low thermal expansion and high thermal conductivity, so that the efficient transfer of heat can be ensured, and the influence of thermal expansion on the structural stability can be reduced.

A circuit breaker monitoring system includes a vibration sensor, a processing unit, and an output unit. The vibration sensor is mounted to a circuit breaker and acquires temporal vibration data over at least a portion of a closing operation of the circuit breaker, which portion includes movement of a moveable contact towards a fixed contact. The vibration sensor provides the temporal vibration data to the processing unit, which converts the temporal vibration data into frequency vibration data and determines a vibration signal and a plurality of spectral indicators or a plurality of spectral points based on the vibration signal. The processing unit determines an indication of operational functionality of the circuit breaker the output unit outputs information relating to the indication of operational functionality of the circuit breaker.

The utility model discloses an indicating piece mechanism of a molded case circuit breaker, which comprises a shell, an electric operating mechanism arranged in the shell, and microswitches and a circuit board which are arranged in the shell, the electric operating mechanism comprises a rotating block which is rotationally arranged, and the indicating piece mechanism is characterized in that the two microswitches are arranged at an interval, a swing rod is rotationally arranged in the shell, and the circuit board is arranged on the swing rod. The swing rod comprises a rotating part arranged in the middle, an abutting section which is arranged on one side of the rotating part and abuts against the rotating block, and an abutting section which is arranged on the other side of the rotating part and can abut against the two microswitches respectively. The swing rod is rotationally arranged on the shell through the rotating part. According to the utility model, the swing rod linked with the electric operating mechanism is arranged, so that when the electric operating mechanism is in different operating states, the swing rod swings adaptively, and a closing state, a free tripping state and a re-tripping state can be fed back to the circuit board by changing the position states of the swing rod and the two microswitches.

A residual current device is configured for connection to a power supply network having at least two power supply conductors and includes a switching device for interrupting the at least two power supply conductors, a sensor for detecting residual currents in the at least two power supply conductors, and a control circuit which is designed to detect a residual current between the at least two power supply conductors using the sensor and, when a residual current is detected, to control the switching device to carry out a switching operation.

The invention relates to a molded case circuit breaker with a shunt excitation auxiliary integrated accessory, and relates to the technical field of circuit breakers, the molded case circuit breaker comprises a shell and a shell cover installed on the shell, and the shell is internally provided with a contact assembly, an operation assembly, an arc extinguishing assembly and an auxiliary assembly; the operation assembly comprises a rotating shaft rotationally arranged in the shell, a transmission piece arranged on the rotating shaft and used for being in linkage with the contact assembly, and a handle driving the rotating shaft to rotate; the auxiliary assembly comprises a base and a cover plate, the base is internally provided with an indication module for displaying the opening and closing states of the circuit breaker and a shunt module for remotely controlling the opening and closing of the circuit breaker, the shell cover is provided with an installation cavity communicated with the interior of the shell, and the exterior of the shell cover is provided with a fixing piece for fixing the auxiliary assembly in the installation cavity; according to the application, the indication module and the shunt excitation module can be integrated in the base and the cover plate, so that the corresponding space utilization rate is improved, more installation space is left on the circuit breaker, and the use requirements are met.

The utility model relates to the field of low-voltage electric appliances, in particular to a circuit breaker, a major loop structure of the circuit breaker comprises an operating piece, an electromagnetic system, a contact system, an arc extinguishing system and a control system, the operating piece slides in a reciprocating manner to drive the contact system to be closed and opened through the electromagnetic system, and the control system controls the electromagnetic system to act to drive the contact system to be closed and opened; the main loop structure further comprises a sampling device, and when overload and / or short-circuit current flows through the contact system, the electromagnetic system is controlled by the control system to drive the contact system to be disconnected; the circuit breaker is simple in structure and can be suitable for various current protection thresholds.

The invention provides a solid-state circuit breaker. The solid-state circuit breaker comprises a shell; the contact assembly is configured to be switched between an opening state and a closing state; a semiconductor element in series with the contact assembly; a handle configured to move between an opening position and a closing position; the first microswitch is fixed to the shell and can be triggered to generate a first signal; the second microswitch is fixed to the shell and can be triggered to generate a second signal; a first trigger portion coupled to the handle to move with movement of the handle; and a second trigger portion coupled to the handle to move with the movement of the handle. Wherein in the process that the handle moves from the closing position to the opening position, before the contact assembly is switched to the opening state, the first trigger part triggers the first microswitch to generate a first signal; and in the process that the handle moves from the opening position to the closing position, the second trigger part triggers the second microswitch to generate a second signal before the contact assembly is switched to the closing state.

The invention discloses a circuit breaker device with a fireproof function and a method, and relates to the technical field of circuit breaker fire prevention. The device comprises an insulating shell and an insulating auxiliary shell, the insulating shell and the insulating auxiliary shell are the same in specification, the insulating auxiliary shell is fixedly installed on one side of the insulating shell, a circuit breaker assembly and an active circuit breaking protection assembly which are used for protecting a circuit are arranged in the insulating shell, and the two ends of the insulating shell are each provided with an auxiliary clamping assembly used for limiting a wire. According to the invention, through the arrangement of the active circuit break protection assembly and a dual circuit break mechanism of component conventional short circuit protection and active temperature linkage protection, when the conventional short circuit protection mechanism is not triggered due to a fault, the electromagnetic coil continuously bears large current to generate joule heat, and after the temperature sensor monitors a supercritical temperature, the electromagnetic coil is switched on; a temperature control signal is transmitted to the active circuit breaking protection assembly to trigger the active circuit breaking protection assembly depending on a miniature electric telescopic rod, a lifting block and other structures, a turnover block is driven to turn over, a circuit is forcibly broken, and fire hazards caused by heating due to faults are effectively avoided.

The invention discloses a direct-current circuit breaker, and relates to the technical field of circuit breakers, the direct-current circuit breaker comprises a circuit breaker main body and a connecting wire, and the top of the circuit breaker main body is provided with a wire socket used for being connected with the connecting wire; the device further comprises a protection main body and a detection assembly. The protection main body can protect the joint of the connecting wire and the wire socket. The protection main body is also provided with a locking assembly, and the locking assembly can lock or unlock the connecting wire. A lifting assembly is further arranged on the protection body and can drive the connecting wire to ascend and descend. The detection assembly is used for detecting the working state of the circuit breaker main body, and when it is detected that the working state of the circuit breaker main body is abnormal, the lifting assembly drives the connecting wire to ascend, so that the connecting wire is separated from the wire socket; when the abnormal working state is relieved, the lifting assembly drives the connecting wire to descend and be inserted into the wire socket. When the circuit breaker works abnormally, the wire can be automatically separated, the use safety is fully ensured, and wiring is convenient.

The invention provides an operating mechanism for a switchgear and a switchgear assembly. The operating mechanism includes: a housing; an operating handle; a first driving member; a second drive member rotatably mounted to the housing, operatively connected to the first drive member on one hand and operatively connected to the switchgear on the other hand, the first drive member having a body and a protrusion extending from the body toward the second drive member, the second drive member having a groove into which the protrusion of the first drive member extends, and the second drive member having a groove into which the protrusion of the first drive member extends. When the switch equipment is tripped under the action of an internal electromagnet, the second driving piece rotates in the first direction to enable the switch equipment to be switched from a switching-on state to a switching-off state under the condition that the operating handle is blocked and cannot rotate, and at the moment, the protrusion moves in the groove relative to the groove, so that the switch equipment is switched from the switching-on state to the switching-off state. The distance between the protrusion and the second end of the groove is designed to be that the protrusion does not block the second driving piece from rotating in the first direction so that the switch device can be switched to the opening state.

The utility model provides a protection device for a circuit breaker and the circuit breaker. The protection device comprises a support which is coupled to a handle of the circuit breaker and is suitable for rotating along with the rotation of the handle between a switching-on position and a switching-off position; and at least one stop arm extending a predetermined distance from the bracket in a direction toward the stop plate of the circuit breaker and arranged to interfere with the stop plate to limit rotation of the handle during a fusion welding fault of the circuit breaker. The circuit breaker comprises a shell, a static contact and a moving contact, the stop plate is coupled to the main shaft, is suitable for moving along with the main shaft and is fixed after fusion welding of the moving contact and the static contact; at least one stop arm of the protection device is suitable for abutting against the stop plate after fusion welding of the moving contact and the static contact; and a handle coupled to the protection device and located at least partially outside the housing. Therefore, the handle can be prevented from rotating to the opening position when the fusion welding fault of the circuit breaker occurs, and the handle is prevented from being locked when the fusion welding fault occurs, so that the safety of the circuit is improved.

Machine learning-based arc fault detection and nuisance trip avoidance includes (i) obtaining data representing properties of an electrical signal sensed by an arc-fault circuit interrupter, (ii) interpreting the properties of the electrical signal as indicating an arc fault, the interpreting being based on application of an initial artificial intelligence (AI) model, (iii) based on the interpreting, opening a switch of the arc-fault circuit interrupter to interrupt the conduction of a supply of power to a load output terminal, (iv) receiving an indication that the properties of the electrical signal do not reflect an arc fault, such indication being that the arc-fault circuit interrupter is to refrain from arc-fault-based opening of the switch, (v) obtaining an updated AI model, where the updated AI model undergoes training using the data representing the properties of the electrical signal as an example of the absence of an arc fault, and (vi) deploying the updated AI model in place of the initial AI model.

The invention relates to an N-pole module assembly of a circuit breaker and the circuit breaker. The N-pole module assembly of the circuit breaker comprises a main body function module and a current detection module, and further comprises a first N-pole conductive plate fixedly integrated on the main body function module and a second N-pole conductive plate fixedly integrated on the current detection module, and the main body function module and the current detection module are respectively two independent modular structures. And the first N-pole current-conducting plate and the second N-pole current-conducting plate are fixedly and electrically connected to form an N-pole electric loop. According to the invention, the complicated bending and wiring process of the soft wire in the N-pole module assembly in the prior art is avoided, the assembly is convenient, and the automatic assembly can be realized. Moreover, through the special arrangement of the relative positions of the N-pole electric loop and the L-pole electric loop, the Lorentz force generated by the magnetic field generated by the current on the N-pole electric loop on the electric arc in the circuit breaker unit can assist the electric arc to be further pushed and lengthened, and the effect of enhancing the magnetic quenching function can be achieved.

Electrical protection device, distribution assembly, and associated electrical switchgear. This electrical protection device (300), configured to electrically connect an electrical load (M) to an electrical power source (S), includes incoming terminals (302), outgoing terminals (304), and switching means (310) actuated by a bistable actuator (324). A microcontroller (320) is provided to generate a fault signal (S320), which triggers the actuator, and an output signal (S321), which is different from the fault signal. The protection device includes a supervisory circuit (500), which is interposed between the microcontroller (320) and the actuator (324) and which includes an oscillator (510) configured to generate a periodic signal (S510).The monitoring circuit is configured to generate a trigger signal (S324) when, alternatively, the output signal (S321) of the microcontroller (320) is absent, or the periodic signal (S510) of the oscillator (510) is absent, or when a fault signal (S320) is emitted. See Figure 6 for abbreviations.

This invention discloses an intelligent circuit breaker, comprising a circuit breaker control module and a tripping mechanism. The circuit breaker control module includes: a sampling isolation circuit for acquiring voltage signals between the live wire (L) and the neutral wire (N), the live wire (L) and the ground wire (PE), and the neutral wire (N) and the ground wire (PE), and also for isolating the line input terminal and acquiring the current signal of the ground wire (PE); an MCU controller, connected to the sampling isolation circuit and the tripping mechanism respectively, for determining whether the voltage signal and / or current signal reaches the protection threshold, and controlling the tripping mechanism to operate when the voltage signal and / or current signal reaches the protection threshold, thereby tripping the circuit breaker; and a back-end isolation circuit, disposed between the MCU controller and the tripping mechanism. This invention can acquire and monitor over / under voltage signals and current signals, and through isolation, ensures that the MCU controller is not affected by electromagnetic radiation from lightning strikes, keeping the intelligent circuit breaker always under control.

The utility model relates to a leakage tripping indicating mechanism, which comprises a partition plate arranged in a shell; the electric leakage indication button is provided with a first position and a second position, the first position extends out of the shell from the opening, the second position is arranged in the shell, and a positioning notch is formed in one side of the electric leakage indication button; a torsion spring; the tripping push rod is rotatably arranged in the shell, one end of the tripping push rod is in linkage with the tripper, the other end of the tripping push rod extends upwards to form a limiting part, the limiting part of the tripping push rod is clamped into the positioning notch when the electric leakage indication button is located at the second position, and the limiting part of the tripping push rod is clamped into the positioning notch when the electric leakage indication button is located at the first position. And the rotation of the tripping push rod is limited by the electric leakage indication button. The electric leakage indication button is slidably arranged in the installation space formed on the partition plate, and the torsion spring at the bottom is used as driving force, so that the whole electric leakage indication mechanism is simplified, the installation difficulty is reduced, and the assembly efficiency is improved.

The present invention provides a circuit breaker accessory with a mechanical lock and a circuit breaker, which relates to the technical field of low-voltage electrical appliances. The circuit breaker accessory with a mechanical lock includes a housing, in which an accessory handle, a mechanical lock, an upper bracket, a lower bracket, a left contact, a right contact, a left lower wiring row, a left middle wiring row, a right middle wiring row, and a right lower wiring row are arranged. The accessory handle is rotatably arranged on the housing, the upper bracket and the lower bracket are coaxially rotatably arranged on the housing, a linkage mechanism is arranged on the lower bracket, the linkage mechanism includes a first lock catch and a first trip catch, and the mechanical lock is slidably arranged on the housing; the circuit breaker includes the circuit breaker accessory with a mechanical lock; through the mutual cooperation of the linkage mechanism, the lower bracket and the upper bracket, the user can, according to actual needs, bring the contacts into contact with the corresponding wiring rows to realize the auxiliary and alarm functions, and through the mechanical lock to cut off the transmission effect of the linkage mechanism, the phenomenon of accidental closing is avoided, and the locking function of the mechanical lock is realized.