2030results about "Protective switch details" patented technology

The invention relates to an open-type combined electric appliance. The open-type combined electric appliance comprises a base; the circuit breaker assembly is installed on the base and comprises a circuit breaker support, a circuit breaker grounding terminal, a tank body, a circuit breaker supporting insulator, an external mutual inductor and an isolating switch static contact; the isolating switch assembly is mounted on the base and comprises an isolating switch bracket, an isolating switch grounding terminal, an isolating switch supporting insulator, a conducting bar, an isolating switch moving contact and a pull rod; a grounding rod is arranged beside each circuit breaker post insulator matched with the isolating switch post insulator, and a grounding contact matched with the grounding rod is mounted on each circuit breaker post insulator; the pull rods are driven by a first linkage mechanism to ascend and descend synchronously, and the grounding rods are driven by a second linkage mechanism to rotate synchronously. According to the combined electric appliance, synchronous swinging of the pull rods and the grounding rods is achieved through cooperation of the first linkage mechanism and the second linkage mechanism, the number of needed middle transmission rod pieces is greatly reduced, the structure is simplified, and action is more convenient.

A circuit breaker protecting an electric low-voltage circuit includes a housing with grid-side and load-side connections and a series circuit of a mechanical isolating contact unit on the grid side and an electronic interruption unit on the load side. The mechanical isolating contact unit has a handle opening and closing contacts. A current sensor unit is disposed in a conductor between the isolating contact unit and the interruption unit, for ascertaining a current level of the low-voltage circuit. A control unit is connected to the current sensor unit, electronic interruption unit, and mechanical isolating contact unit. When current and / or current / time thresholds are exceeded, prevention of a current flow in the low-voltage circuit is initiated. A power supply unit supplying energy to the circuit breaker is connected to conductors of the low-voltage circuit between the isolating contact unit and the interruption unit.

The invention relates to the technical field of miniature circuit breakers, and discloses an anti-interference miniature circuit breaker and a use method.The anti-interference miniature circuit breaker comprises a working shell, one side of the inner wall of the working shell is fixedly connected with a fixing frame, the top of the inner wall of the working shell is fixedly connected with a telescopic rod, and the output end of the telescopic rod is fixedly connected with a lifting frame; five irregular holes are formed in one side of the lifting frame, the loading heat dissipation mechanism comprises a cross rod fixedly connected to the side wall of the inner wall of the working shell, a sliding frame is slidably connected to the inner wall of the fixing frame, the bottom end of the sliding frame penetrates through the fixing frame and extends to the outer portion of the fixing frame, and a worker pulls a square plate to make the square plate move downwards; the square plate drives the sliding frame to move downwards, then a plurality of circuit breakers are placed on the inner wall of the fixing frame, the square plate is loosened, the first spring drives the sliding frame to move upwards due to elastic deformation of the first spring, the circuit breakers are extruded in the upward moving process of the sliding frame, and the circuit breakers can be rapidly installed on the inner wall of the fixing frame.

The utility model provides a molded case circuit breaker, which relates to the field of circuit breakers, and comprises a circuit breaker shell, a contact system and an arc extinguishing system arranged in the circuit breaker shell, the contact system is connected with the arc extinguishing system, an installation seat is arranged outside the circuit breaker shell, the circuit breaker shell is clamped with the installation seat through a buckle, and the buckle is connected with the installation seat. A supporting assembly used for supporting the circuit breaker shell is further arranged at the bottom of the mounting base and comprises an adjusting rod and a split type detachable elastic clamping piece, the two ends of the elastic clamping piece are fixedly connected with the circuit breaker shell and the adjusting rod respectively, and the other end of the adjusting rod penetrates through the bottom of the mounting base and is in threaded fit with an adjusting cap. A gap is formed between the outer surface of the adjusting rod and the inner wall of the mounting base, the adjusting rod is clamped in the elastic clamping piece, then the adjusting cap is rotated to be attached to the bottom wall of the mounting base, at the moment, the adjusting rod does not move any more, the circuit breaker shell is fixedly supported, the supporting effect of the circuit breaker shell is further improved, and the situation that the circuit breaker is loosened due to impact is prevented.

A multi-pole assembling device for a circuit breaker is characterized in that a conveying belt is arranged on a machine frame, a feeding turnover mechanism and a discharging turnover mechanism are arranged at the two ends, corresponding to the conveying belt, of the machine frame respectively, a waste storage box is arranged on one side, corresponding to the conveying belt, of the machine frame, and a rotary feeding mechanism is arranged on the other side of the machine frame; the rotary feeding mechanism is provided with a plurality of positioning carriers evenly distributed in the circumferential direction of the center of the rotary feeding mechanism, the positioning carriers are used for positioning two circuit breakers at the same time, and the rack is sequentially provided with a feeding mechanism, two sets of shaft assembling mechanisms, a detection mechanism, a circuit breaker splicing mechanism, a handle sheath assembling mechanism and a discharging mechanism in the rotating direction of the rotary feeding mechanism. By the adoption of the scheme, the automatic assembling machine can be integrated into a circuit breaker production and assembly line, the steps of overturning, feeding, shaft assembling, detecting, splicing, sheath assembling, discharging and overturning can be sequentially achieved, automatic multi-stage splicing is achieved, manual operation is not needed, the automation degree is high, the labor cost is reduced, and the working efficiency is greatly improved.

The utility model relates to a rotating shaft structure, a transmission system, an operating mechanism and a switch equipment assembly. The rotating shaft structure comprises a rotating shaft which is rotatably installed on the shell and can rotate between a first rotating position and a second rotating position, and the rotating shaft is further configured to be capable of translating between a first translation position and a second translation position in the direction of the rotating axis of the rotating shaft; the blocking assembly is pivotally connected to the rotating shaft and can be switched between a first posture and a second posture relative to the shell; the matched blocking piece is fixed to the shell, when the blocking assembly is in the first posture, the matched blocking piece is located outside a translation path of the rotating shaft translating from the first translation position to the second position, so that the rotating shaft is allowed to translate to the second translation position, and when the blocking assembly is in the second posture, the matched blocking piece is located outside the translation path. The mating stopper is in a translation path in which the rotation shaft translates from the first translated position to the second position, thereby blocking the rotation shaft from translating to the second translated position.

According to the technical scheme, the arc extinguishing mechanism of the air circuit breaker is characterized in that the arc extinguishing mechanism comprises a shell, and a mounting hole is formed in the outer portion of the shell; the grid baffle plate is movably arranged in the mounting hole in a sleeving manner; the placing block is fixedly connected to one side of the grid baffle plate, and an insulating frame is movably arranged in the placing block in a sleeving manner; the adjusting part is arranged in the placing block; through the arrangement of the cleaning piece, after the arc extinguishing grid pieces are used for a long time and the shell is detached from the interior of the distribution box, the position of the adjusting frame is adjusted by using the adjusting part, so that the adjusting frame can move up and down outside the arc extinguishing grid pieces; at the moment, the plurality of cleaning pieces can clean the surfaces of the left side and the right side of the arc extinguishing grid piece respectively, so that dirt deposited on the surfaces of the arc extinguishing grid piece is removed, and the dirt on the surfaces of the arc extinguishing grid piece is prevented from affecting the arc extinguishing effect.

The invention belongs to the technical field of power electronics, and provides an energy storage valve sub-module, an energy storage valve and an energy storage station, the energy storage valve sub-module can disconnect electrical connection between a power module and an energy storage module through a switch module to form electrical isolation, so that the electrical connection between the power module and the energy storage module is released, and the energy storage station is protected. When parts except the energy storage module in the energy storage valve are overhauled, leakage current does not exist, and the personal safety of maintainers can be guaranteed. Similarly, under the condition that the energy storage module side of the energy storage valve has a non-serious fault, on the premise that the energy storage valve is locked, the energy storage module is separated from the system through the switch module, safe operation of the whole machine is not affected, and the availability rate of the system can be effectively increased.

The invention relates to the technical field of high-voltage switch equipment, and discloses a primary and secondary fusion pole-mounted circuit breaker which comprises a base, a front plate is arranged on the front side of the base, the base and the front plate are connected through a connecting plate, a first solid-sealed polar pole is arranged on the top of the base, and a second solid-sealed polar pole is arranged on the top of the front plate. A high-voltage input plate is arranged at the top of the solid-sealed polar pole I, a high-voltage output plate is arranged on one side wall of the solid-sealed polar pole I, the connecting frame is fixedly connected between the solid-sealed polar poles I, the bird repelling mechanism is arranged at the top of the connecting frame and used for repelling birds to prevent the birds from stopping, and the shielding mechanism is arranged at the top of the solid-sealed polar pole I. By means of the bird repelling mechanism, the all-weather and intelligent active bird repelling function is achieved, stable equipment operation is guaranteed, a dual-drive mode combining wind power and solar power is adopted, it is guaranteed that the bird repelling function is uninterrupted, pollution flashover or short circuit faults caused by bird activities to high-voltage insulation parts are effectively avoided, and the equipment operation reliability is improved.

A switching device comprises a shell, a contact system and two electromagnetic systems, the contact system and the two electromagnetic systems are arranged in the shell, the two electromagnetic systems are oppositely arranged on the two sides of the contact system, and each electromagnetic system comprises an upper armature and a coil used for driving the upper armature to move. The upper armatures of the two groups of electromagnetic systems are connected through a linkage shaft, the contact system comprises a static contact and a moving contact 5 arranged on a contact support 4, the linkage shaft is connected with the contact support, and the two groups of electromagnetic systems respectively drive the contact support to move through the linkage shaft. The contact support drives the moving contact to be in contact with or separated from the static contact, the driving force is large, the action response is fast, the balance is good, and the height of the switching device can be reduced.

The utility model relates to the technical field of auxiliary contacts of molded case circuit breakers, and discloses an auxiliary contact device of a molded case circuit breaker, which comprises a shell, the outer wall of the shell is fixedly connected with a cylinder, the output end of the cylinder is fixedly connected with a moving block, and the outer wall of the moving block is rotatably connected with a pull plate. A fixing plate is fixedly connected to the inner wall of the shell, a first linkage plate is rotationally connected to the outer wall of the fixing plate, the outer wall of the first linkage plate is rotationally connected to the inner wall of a pulling plate, a second linkage plate is rotationally connected to the inner wall of the pulling plate, and a limiting block is rotationally connected to the outer wall of the second linkage plate. According to the utility model, the output end of the air cylinder drives the moving block and the second linkage plate to rotate on the inner wall of the limiting block and the first linkage plate to rotate on the outer wall of the fixed plate so as to drive the sliding plate to slide on the outer wall of the first sliding rail, and then the contact body can be clamped and fixed through the first clamping block and the second clamping block; the effect of improving the stability of the contact body is achieved.

An electronic leakage circuit breaker. It solves the problem that the existing contact system will affect the control circuit board when disconnected. It includes a shell, the shell includes a first shell and a middle shell, the first shell and the middle shell cooperate with each other to form a first accommodating chamber, and also includes: a first contact mechanism, which is arranged in the first accommodating chamber and is arranged in close contact with the middle shell; the first contact mechanism includes a moving contact piece and a static contact piece; a zero-sequence transformer, which is arranged in the first accommodating chamber; a control circuit board, which is connected to the zero-sequence transformer and is used to receive the signal on the zero-sequence transformer; an isolation component, which is arranged between the control circuit board and the first contact mechanism, and is used to separate the control circuit board and the first contact mechanism. The beneficial effect of the utility model is that an isolation component is provided to separate the control circuit board and the first contact mechanism, so as to prevent the arc of the contact mechanism from affecting the control circuit board and thus affecting the life and stability of the product.

The invention relates to a disconnector with a volume compensation function. The disconnector comprises a mounting shell, and the tail of the mounting shell is in sealed connection with a liquid cooling module; a floating shell is arranged in the mounting shell, a valve element assembly is further arranged in the floating shell, when the disconnector is in a disconnected state, the valve element assembly and the floating shell are matched and sealed to enable a flow channel in the floating shell to be closed, and when the disconnector is connected with an adaptive disconnector, the valve element assembly and the floating shell are unsealed to enable the flow channel in the floating shell to be opened; a first elastic piece enabling the floating shell to move backwards in the axial direction is further arranged in the installation shell, and a stopping structure is further arranged in the installation shell and matched with a limiting part on the floating shell to prevent the floating shell from being disengaged from the tail of the installation shell. And the floating shell is always kept in radial sealing with the mounting shell in the moving stroke of the floating shell. According to the disconnector, when an internal fluid medium reaches a certain threshold value, the internal structure is stressed to axially move forwards, so that the fluid containing space in the mounting shell is enlarged, and the fluid pressure is reduced.

A remotely operated circuit interrupter includes: primary separable contacts coupled to an operating mechanism and a thermal-magnetic trip device structured to interrupt current from flowing to loads by opening the primary separable contacts during a fault event; and a fault current tolerant secondary switching mechanism including secondary separable contacts coupled to the primary separable contacts in series, Rogowski coils, a di / dt measurement circuit, a secondary solenoid driver, the Rogowski coils structured to continuously sense a rate (di / dt) of change of load current, the di / dt measurement circuit structured to receive a signal including the sensed di / dt, determine that the sensed di / dt has reached or exceeded a threshold current rate of change, and output a fault signal to the secondary solenoid driver based on the determination, the secondary solenoid driver structured to actuate the solenoids to fully open the secondary separable contacts using arc voltages of the primary and secondary contacts.

The utility model belongs to the technical field of power equipment, and discloses a circuit breaker. The circuit breaker comprises a base and a cover body, the cover body and the base are mutually buckled to form a mounting cavity, a plurality of heat dissipation holes are formed in the top of the cover body, a connecting plate is arranged at the bottom of the cover body, one end of the connecting plate is attached to the end face of the base, a plurality of flow guide structures are arranged on the connecting plate, and the heat dissipation holes and the flow guide structures are all communicated with the mounting cavity. And the mounting cavities can be communicated with the external space through the heat dissipation holes and the flow guide structures. According to the utility model, under the condition that the overall volume of the circuit breaker is not influenced, gas convection is formed, the heat dissipation efficiency is improved, and the temperature rise of the circuit breaker is reduced.

The invention discloses a circuit breaker arc extinguishing system and an arc extinguishing method, and belongs to the field of circuit breaker arc extinguishing. An arc extinguishing system of a circuit breaker comprises a shell and an arc extinguishing chamber fixedly connected to the end portion of the shell. According to the invention, through rotation of the fan blades, external air is extracted into the heat dissipation chamber and acts on the heat dissipation fins, so that the heat dissipation fins further cool SF6 gas in the blowing rod, and the SF6 gas has a relatively low temperature so as to reduce the energy of an electric arc, thereby reducing the duration and strength of the electric arc, being beneficial to reducing the damage of the electric arc to equipment, and improving the safety of the equipment. The arc extinguishing efficiency is improved, so that the SF6 gas can extinguish the arc more quickly, a circuit breaker and equipment are well protected, meanwhile, the arc is guided to the grid plate more quickly, the staying time of the arc between the contacts is shortened, damage of the arc to the contacts is reduced, the situation that the equipment is damaged due to poor contact of the contacts is prevented, and the service life of the circuit breaker is prolonged. And when the circuit breaker is normally connected with the circuit, electric sparks are generated to cause fire disasters.

The utility model relates to the technical field of pole-mounted circuit breakers, discloses a primary and secondary fusion type pole-mounted circuit breaker, and solves the problems that in the use process of the primary and secondary fusion type pole-mounted circuit breaker, the primary and secondary fusion type pole-mounted circuit breaker is not provided with a protective shielding part, so that the primary and secondary fusion type pole-mounted circuit breaker is directly exposed and is easily influenced by sunlight and rainwater, the service life is shortened, and the cost is reduced. The pole-mounted circuit breaker comprises a pole-mounted circuit breaker body, a supporting bottom plate is fixedly installed at the bottom of the pole-mounted circuit breaker body, a supporting frame is fixedly installed on one side of the pole-mounted circuit breaker body and located on the top of the supporting bottom plate, and a protective shielding assembly is fixedly installed on the top of the supporting frame. An adjusting assembly is installed on the side, away from the pole-mounted circuit breaker body, of the supporting frame. According to the utility model, the primary and secondary fusion type pole-mounted circuit breaker can be prevented from being directly exposed in the using process, the influence of sunlight and rainwater on the primary and secondary fusion type pole-mounted circuit breaker is reduced, the service life of the primary and secondary fusion type pole-mounted circuit breaker is prolonged, and better practicability can be conveniently achieved.

The utility model relates to an outdoor circuit breaker. The technical problem to be solved by the utility model is to provide an outdoor circuit breaker. According to the technical scheme, the circuit breaker comprises a circuit breaker base, base fixing screws and a base lifting handle, the base lifting handle comprises a lifting handle handheld portion, a lifting handle extending portion and a lifting handle inserting portion are arranged on one side of the lifting handle handheld portion, a lifting handle drainage groove is formed between the lifting handle extending portion and the lifting handle inserting portion, and the lifting handle inserting portion is arranged on the lifting handle drainage groove. A lifting handle handheld cavity is formed in the lifting handle handheld part, a lifting handle anti-moving column is arranged in the lifting handle handheld cavity, and a lifting handle elastic clamping hook is arranged on the other side of the lifting handle handheld part. The utility model has the advantages that the base handle is designed to be detachable, no interference is caused to the internal structure, the use is more flexible, after transportation and fixation are completed, the direction is turned, the base handle is covered outside the base fixing screw to form a protective cover, the base fixing screw is prevented from being exposed to cause rusting and mistaken disassembly, and the protective property and the waterproof property are greatly improved.

The utility model relates to a splicing type disconnecting switch base, which relates to the technical field of switch bases and comprises a mounting base, a cover plate is rotatably mounted on the mounting base, two elastic telescopic rods are hinged between the cover plate and the mounting base, a square clamping groove is formed in the mounting base, and a limiting rod is mounted on one side of the square clamping groove in a sliding manner. The adjustable connecting assemblies are installed on the two sides of the installation base, each adjustable connecting assembly comprises an installation sleeve, the barrel is installed on the installation base, limiting sliding grooves are formed in the inner walls of the installation sleeves, clamping blocks are installed between the limiting sliding grooves in a sliding mode, a plurality of connecting pieces can be connected, and the requirements for different using numbers are met; the mounting base is convenient to disassemble and mount, the clamping blocks can be stored when connection is not carried out, the attractiveness and the applicability are improved, the cover plate can be conveniently opened and locked through the elastic telescopic rod, the reset spring and the limiting rod, and a switch in the mounting base can be conveniently overhauled.

A circuit breaker comprises a shell, an arc extinguish chamber and an arc striking chamber, the arc extinguish chamber and the arc striking chamber are arranged in the shell, the arc striking chamber comprises two arc isolating pieces which are oppositely arranged, an arc striking channel is formed between the two arc isolating pieces, the shell comprises two side plates, the two side plates are arranged on the side faces, away from the arc striking channel, of the two arc isolating pieces respectively, and the two side plates are arranged on the side faces, away from the arc striking channel, of the two arc isolating pieces respectively. At least one side plate is provided with a supporting wall, a flow guide cavity is defined by the supporting wall, the side plates and the arc isolating piece, the flow guide cavity and the arc striking channel are oppositely arranged on the two sides of the arc isolating piece, and the flow guide cavity is provided with an air inlet communicated with the arc striking channel and an air outlet communicated with an arc extinguish chamber. When the air pressure of the gas generated by breaking of the circuit breaker is high, the gas can enter the flow guide cavity under the driving of the air pressure difference, the high-temperature and high-pressure gas generated at the breaking moment is prevented from being all concentrated in the arc striking channel, and the gas enters the arc extinguish chamber to be extinguished after being cooled and subjected to auxiliary pressure relief through the flow guide cavity.

An abnormality detection device includes: an acquisition unit configured to acquire a state of a relay that is connected to an instrument to be monitored and controls opening and closing of a circuit to which the instrument is connected; a detector configured to detect an abnormality of the instrument on the basis of the state of the relay or a change in the state of the relay; and a notifying unit configured to notify a user of the abnormality detected by the detector.

The invention discloses a power-off device, a battery and a power utilization device, and the power-off device comprises an insulating base which is provided with at least two conductive parts; and the circuit breaking part is detachably arranged on the insulating base, the circuit breaking part is connected with the at least two conductive parts in series and is electrically connected with the at least two conductive parts, so that an assembly formed by the circuit breaking part and the at least two conductive parts can transmit electric energy, and the circuit breaking part is constructed to be capable of breaking the electrical connection when a preset condition is met. The cut-off device integrates the functions of power failure maintenance and short-circuit power failure protection, the circuit breaking piece can play a role in short-circuit power failure protection and can be matched with the insulation base to play a role in power failure maintenance only by detaching the circuit breaking piece from the insulation base during power failure maintenance, the integration degree of the cut-off device is high, and the service life of the cut-off device is prolonged. The number of parts can be reduced, the overall size of the device can be optimized, and the size of the cutting device is reduced.

A printed circuit board (PCB) is provided and includes a plurality of edge connectors, a pin connector, and a plurality of electrical lines each electrically connecting one of the plurality of edge connectors to the pin connector. The plurality of edge connectors are positioned on the PCB to enable the plurality of edge connectors to interface with respective connectors of a plurality of configurations of circuit breakers. The configurations may include a configuration including a first type of circuit breaker and a configuration including a second type of circuit breaker. The first and second types of circuit breakers may be 1-63 ampere (A) and 80-125A circuit breakers or 80-125A and 200A circuit breakers, or may be any of a variety of other types.

The utility model discloses an outdoor pole-mounted circuit breaker, and relates to the technical field of circuit breakers, the outdoor pole-mounted circuit breaker comprises a mounting base and a circuit breaker body, the top of the mounting base is fixedly provided with a hollow support column, the side part of the hollow support column is provided with a strip-shaped chute, and the strip-shaped chute is internally provided with a mounting plate in a sliding manner. The L-shaped fixing plate, the fixing inserting rod, the fixing inserting hole and the handle block are arranged in a matched mode, the connecting round block can be fixed or loosened, when the connecting round block is in a loosened state, the L-shaped hand crank can be rotated, and the L-shaped hand crank rotates to drive the mounting plate to move up and down through the control rotating shaft, the rope winding rotating disc, the vertical guide rod, the fixed pulley and the steel wire rope. Therefore, the purpose of lifting the circuit breaker body is achieved, a worker does not need to climb to a high place for maintenance work, the safety is good, the workload of the worker can be effectively relieved, maintenance work is facilitated, the operation is simple and convenient, and the practicability is good.

Provided in the embodiments of the present disclosure are a magnetic latching relay, comprising: a base, a contact structure, a first stationary spring lead-out member, a coil assembly and a magnetic circuit structure, wherein the contact structure is arranged on the base, the contact structure has a first end and a second end in a transverse direction, the first end is provided with a first contact group, and the second end is provided with a second contact group; one end of the first stationary spring lead-out member is connected to the first end, and the other end of the first stationary spring lead-out member extends out of the base from the bottom of the base in a vertical direction; the coil assembly and the magnetic circuit structure are arranged on the base and are located on the side of the contact structure in a longitudinal direction; and when a pulse voltage is applied to the coil assembly, the magnetic circuit structure and the coil assembly can form a constant magnetic field, a first center line of the constant magnetic field in the longitudinal direction deviates from a second center line between the first contact group and the second contact group, and is closer to the second contact group, such that the constant magnetic field is far away from the first stationary spring lead-out member. The magnetic latching relay of the present disclosure has a higher stability.

The invention relates to the technical field of circuit breakers, and discloses a long-service-life miniature circuit breaker which comprises a shell, a handle is rotationally connected to the shell, a limiting plate is slidably connected to the shell, a limiting strip is arranged on the limiting plate, and a limiting groove allowing the limiting strip to be inserted therein is formed in the handle; when the handle is in a circuit disconnection state, the limiting strip can be inserted into the limiting groove; when the handle is in a circuit connection state, the limiting strip cannot be inserted into the limiting groove, and when the handle is in a circuit disconnection state, a worker slides the limiting plate to enable the limiting strip to be inserted into the limiting groove, so that the limiting strip limits the handle, and the handle can be fixed to the shell. The situation that the handle rotates from the circuit disconnection state to the circuit connection state due to the fact that a worker mistakenly touches the handle is avoided, and the worker is not prone to danger in the maintenance process.

The invention relates to the technical field of pole-mounted circuit breakers, and discloses a primary and secondary fusion pole-mounted circuit breaker, which comprises a circuit breaker and a mounting bracket, a mounting plate is arranged on the mounting bracket, a mounting hole is formed in the mounting plate, an adjusting plate is rotatably connected in the mounting hole, a gradienter is arranged on the adjusting plate, and the gradienter is arranged on the mounting plate. A fixing structure used for fixing the adjusting plate is arranged on the installing plate, the circuit breaker is installed on the adjusting plate, a worker firstly installs the installing support on a wire column, then the adjusting plate is rotated, the adjusting plate is determined to be in a horizontal state through the gradienter, and finally the worker installs the circuit breaker on the adjusting plate through the fixing structure. And the adjusting plate can stably realize the installation of the circuit breaker.

The utility model discloses a device for preventing a buckle from being pulled out by mistake. The device comprises a shell which can be inserted into or pulled out of a case, and a panel, a handle and a buckle which are arranged in the shell, wherein a clamping groove penetrating through the inside and the outside of the shell is formed in the side wall of the shell; the panel is close to the clamping groove and is arranged in the shell; the handle is arranged on the panel in a sliding manner; the buckle is installed in the shell in a sliding mode in the direction of the clamping groove, and the included angle between the face, back to the case, of the buckle and the outer side face, facing the buckle, of the shell is smaller than or equal to 90 degrees. When the handle slides into the shell, the buckle can extend out of the shell from the clamping groove under the action of external force; when the handle slides out of the shell, the buckle can be driven by the handle to retract into the shell. According to the utility model, when the circuit breaker is inserted into the cabinet and is switched on, the buckle extends out of the shell and is clamped in the preset groove of the cabinet, so that the circuit breaker cannot be pulled out of the cabinet in a switched-on state, the risk of electric shock of an operator in the process of switching on and switching off the cabinet is effectively avoided, and the safety of the circuit breaker is improved.

An electric circuit breaker device includes a housing, an igniter, a projectile, and a conductor piece including, between a first connection end portion and a second connection end portion, a cutoff portion to be cut by movement of the projectile, in which a boundary portion with the cutoff portion from which the cutoff portion is cut in the first connection end portion of the conductor piece held in the housing is defined as a first cutting edge portion, and a boundary portion with the cutoff portion from which the cutoff portion is cut in the second connection end portion is defined as a second cutting edge portion, and a groove is formed at a position corresponding to the conductor piece crossing an accommodating space and in a predetermined inter-edge inner wall region positioned between the first cutting edge portion and the second cutting edge portion, in an inner wall surface of the housing.