1836results about "Protective switch terminals/connections" patented technology

The invention discloses a plug-in circuit breaker power supply device of a power distribution box, and particularly relates to the technical field of power distribution boxes, the plug-in circuit breaker power supply device comprises an insulating frame body, a regulation and control assembly is arranged on the insulating frame body, the regulation and control assembly comprises a central partition plate arranged in the insulating frame body, and a plurality of current converters are plugged on the central partition plate; supporting insulating frames are arranged on the two sides of the bottom of the center partition plate. The first conductive connecting strip, the second conductive connecting strip and the current collector are rapidly separated in a rotating rod deflection mode, the insulation performance is effectively ensured, rapid opening and closing are easy, the second conductive connecting strip can make contact with the third conductive connecting strip, the signal conversion and transmission function is achieved, and the service life is prolonged. And the fourth conductive connecting strip can transmit a current signal on the current frequency converter to the other current collectors after being transferred by the fourth conductive connecting strip, and each structure realizes a rapid opening and closing current conversion mode, so that the insulation performance of the device during use can be effectively ensured.

The invention discloses a small residual-current circuit breaker, which comprises a shell, an operating mechanism, a residual-current release and a transmission rod, when the electric leakage tripper is actuated, an ejector rod of the electric leakage tripper pushes the transmission rod, so that the transmission rod rotates from a reset position to an actuating position, and the transmission rod pushes the mechanism assembly to unlock in the rotating process, so that the operation mechanism is converted from closing to tripping. The rotation center of the handle and the rotation center of the mechanism assembly are both located in the first space, and the handle is located between the electric leakage release and the mechanism assembly in the length direction; the handle is provided with a reset part, and after the electric leakage release is actuated, the reset part impacts the transmission rod to enable the transmission rod to return to the reset position from the actuation position in the process that the handle is converted from closing to tripping; the position relation of the electric leakage tripper, the operating mechanism and the like is rearranged, so that the product structure is more compact, and the size of the circuit breaker in the length direction is reduced.

The invention relates to the technical field of circuit breakers, in particular to a circuit breaker with a reclosing mechanism, which comprises a shell, a circuit breaker handle is rotationally arranged in the shell, an operating rod and at least three gears meshed in sequence are further rotationally arranged in the shell, and the tooth number of each gear is gradually increased in sequence. The two gears located on the two sides are a small gear and a large gear respectively, the number of teeth of the small gear is smaller than the number of teeth of the large gear, the operating rod is fixedly connected with the small gear, and the large gear is in transmission connection with a circuit breaker handle. Speed reduction and torque increase are realized through the gear train, so that the force required to be applied when a user manually operates the handle of the circuit breaker is remarkably reduced, the operation intensity is reduced, the convenience of manual reclosing is improved, and the manual reclosing device is particularly suitable for a large-current circuit breaker or an occasion requiring a relatively large operation torque.

The invention belongs to the technical field of battery charging equipment, and particularly relates to a high-voltage isolation centralized charging cabinet and a charging method thereof.The high-voltage isolation centralized charging cabinet comprises a charging cabinet body, a plurality of charging cavities are arrayed in one side of the charging cabinet body at equal intervals, a first mounting groove is formed in the other side of each charging cavity, and a separation mechanism is arranged in each first mounting groove; an electric push rod stretches to drive a top disc to move, drive a slope clamping block to retract into a first inserting groove, the electric push rod continues to stretch, at the moment, a square inserting rod is driven to move towards one side, a push plate is matched with a door opening mechanism, the bottom of a box door moves towards one side to be opened, meanwhile, an on-fire battery is pushed to be separated from a charging cavity, and the electric push rod retracts and resets; the second spring drives the square inserting rod to reset and move and drives the push plate to return to the initial position; according to the invention, the on-fire battery can be quickly pushed out of the charging cavity, the battery is prevented from burning and exploding in the charging cavity, and a reliable guarantee is provided for the safety of the whole charging environment.

A circuit breaker comprises a circuit breaker body, and accessories which can be selectively and additionally arranged on the circuit breaker body at least comprise an air outlet groove accessory, an arc striking row accessory, a bottom cover and a dustproof cover accessory. The beneficial effects of the invention are that the technical scheme achieves the selectable installation of accessories through the modular design, and remarkably improves the applicability and flexibility of the circuit breaker. A user can flexibly combine the accessories according to actual use scenes (such as different environments or functional requirements), so that the purchase of unnecessary components is avoided, and the initial cost is reduced; meanwhile, a subsequent installation mechanism allows a user to gradually expand functions when demands change, the whole circuit breaker does not need to be replaced, and resource waste is reduced.

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 relates to the technical field of pole-mounted circuit breakers, and discloses a primary and secondary fusion pole-mounted circuit breaker convenient to install, the circuit breaker comprises a circuit breaker main body and a control box, support legs are arranged at the bottom of the control box, a quick installation seat is arranged on a bearing beam, and the quick installation seat comprises an installation seat main body; the supporting device comprises a front roller and a rear roller located above the mounting base body, the two ends of the front roller and the rear roller are rotationally connected with two liftable supporting plates, locking structures and reset structures are arranged on the supporting plates, and the rolling direction of the front roller and the rolling direction of the rear roller are perpendicular to the direction of the bearing beam; side baffles are arranged at the positions, on the two sides of the bearing beam, of the bottom of the installation base body, the left and right rolling wheels rotationally connected are installed in the side baffles, and the rolling direction of the left and right rolling wheels is parallel to the direction of the bearing beam. The primary and secondary fusion pole-mounted circuit breaker convenient to install has the advantages of being convenient to install, rapidly adjusting the installation position and being high in installation stability.

The invention discloses a plug-in circuit breaker which comprises a mounting plate, a plug-in circuit breaker body arranged on the right side of the mounting plate and a connecting assembly arranged on one side of the mounting plate, the connecting assembly comprises a heat dissipation mechanism arranged on one side of the plug-in circuit breaker body, and a limiting mechanism is arranged on the lower portion of the plug-in circuit breaker body. A damping mechanism is arranged on one side of the mounting plate, the slope clamping block movably penetrates through the movable groove and is clamped with the clamping groove, one end of the first spring is fixedly connected with the movable block, the outer side of the movable block is fixedly connected with the pull rod, and one end of the first inner groove is fixedly connected with the ejection column; and the mounting sleeve is mounted at the bottom of the plug-in circuit breaker body through the mounting block. The problems that according to an existing device, a dustproof net is inconvenient to disassemble and clean manually, after the dustproof net is used for a long time, meshes are prone to being blocked, the ventilation effect of the dustproof net is affected, and the subsequent heat dissipation effect is affected are solved.

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 utility model discloses a mounting structure of an electric leakage protection module, which comprises a plurality of circuit breakers and the electric leakage protection module, the electric leakage protection module is spliced with the plurality of circuit breakers, and one end of the electric leakage protection module spliced with the circuit breakers is provided with a plurality of rigid first conductive plates. Corresponding ends of the plurality of circuit breakers are provided with rigid second conductive plates, one end of the electric leakage protection module is provided with an insertion block or a slot, and one end of each circuit breaker is provided with a slot or an insertion block which is in insertion fit with the insertion block or the slot of the electric leakage protection module along the longitudinal direction. The first conductive plate and the second conductive plate can be stacked together in the longitudinal direction while the electric leakage protection module and the circuit breaker are connected in an inserted mode through the inserting block and the inserting groove, the first conductive plate and the second conductive plate are connected and fixed through screws, an opening is formed in the upper portion of the splicing position of the circuit breaker and the electric leakage protection module, and a cover plate is arranged at the opening. The utility model has the advantages of simple assembly process and strong reliability.

The invention provides a circuit breaker, and relates to the technical field of electrical equipment. The circuit breaker comprises a moving contact, a static contact, a first connecting conductor and a second connecting conductor, the first connecting conductor comprises a first connecting section, a flexible connecting section and a second connecting section which are connected in sequence, the first connecting section is used for being fixedly arranged on an installation shell and used for being connected with an external electrical element, and the second connecting section is connected with the moving contact. The moving contact moves synchronously along with the moving contact; the static contact is connected with the second connecting conductor; under the condition that the moving contact and the static contact are switched on, the first connecting section, the flexible connecting section, the second connecting section, the moving contact, the static contact and the second connecting conductor form a conductive loop, and the current direction of the first connecting section is opposite to that of the second connecting section and is the same as that of the second connecting conductor. The purpose of enhancing the contact pressure of the contact by using the electromagnetic force generated by the current in the closing state is achieved, so that the short-time tolerance performance and the operation reliability of the circuit breaker are improved.

The invention relates to the technical field of power distribution switch equipment, in particular to a ring main unit. The ring main unit comprises a box body, the left side wall and the right side wall of the box body are respectively provided with a three-position switch module and a circuit breaker module which are mutually independent, the three-position switch module comprises a three-position module fixing frame and three-position switches which are installed on the three-position module fixing frame side by side in a front-back mode, and the three-position switches are direct-acting three-position switches. The isolating static contact and the grounding static contact are arranged on the upper side and the lower side respectively, the switch moving contact base and the moving contact arranged in the switch moving contact base are located between the isolating static contact and the grounding static contact, and the circuit breaker module comprises a circuit breaker module fixing frame and circuit breakers installed on the circuit breaker module fixing frame side by side front and back. And the moving contact of the circuit breaker moves up and down to open and close. The three-position switch module and the circuit breaker module can realize a bus-side three-position scheme and a line-side three-position scheme through different combination modes, the standardization of the modules is realized, and the universality is improved.

The utility model relates to the technical field of power protectors, and discloses an overload protection switch terminal which comprises a shell, a mounting mechanism is arranged on the shell, a piston seat is fixedly mounted on the inner wall of the left side of the shell, a piston cavity is formed in the piston seat, hydraulic oil is arranged in the piston cavity, a pushing mechanism is arranged in the piston cavity, and a wiring end is arranged on the left side of the shell. The overload protection device has the following advantages and effects that the pushing mechanism is arranged, the piston plate and the push rod can be pushed to move rightwards through heating expansion of hydraulic oil, the movable contact piece can be driven to be separated from the static contact, so that a circuit is cut off, and the purpose of an overload protection function can be achieved; according to the utility model, the spring can pull the push rod and the piston plate to reset leftwards through the resilience force of the spring, the movable contact piece can be contacted with the static contact again, the circuit can be recovered to the conducting state, and the purposes of automatically electrifying the switch terminal and being convenient to use can be further achieved.

The utility model discloses a miniature circuit breaker, which comprises a shell provided with an arc extinguish chamber. The arc extinguish chamber is connected with an upper arc striking sheet; the upper arc striking sheet comprises an upper arc striking sheet conductive section and an upper arc striking sheet arc striking section; the conductive section of the upper arc striking sheet is made of copper, and the arc striking section of the upper arc striking sheet is made of iron; the upper arc striking sheet conductive section and the upper arc striking sheet arc striking section are connected through a solder layer; a moving contact plate used for being matched with the upper arc striking sheet is arranged in front of the upper arc striking sheet, and an electric shock part used for being in contact with the upper arc striking sheet is arranged on the moving contact plate. The moving contact plate is made of copper-iron-phosphorus alloy.

The invention discloses an anti-impact circuit protection element, which comprises a shell, a movable arm, a fixed arm, a PTC (Positive Temperature Coefficient) thermistor and a shape memory alloy sheet, and is characterized in that one end of the movable arm is provided with a movable contact; a fixed contact is arranged on the fixed arm, the movable contact is in contact with the fixed contact, and the PTC thermistor is attached to and fixedly connected with the fixed arm; the upper surface and the lower surface of the shape memory alloy sheet are attached to the movable arm and the PTC thermistor respectively, the shape memory alloy sheet comprises a plane part and a bent part, and the plane part is fixedly connected with the PTC thermistor; the movable arm is fixedly connected with one part of the plane part or the bent part; in a low-temperature phase state, the shape memory alloy sheet is in a plane state; and in a high-temperature phase state, the bending part generates angle change relative to the plane part to generate mechanical thrust to upwards jack up the movable arm so as to separate the movable contact from the fixed contact. The circuit protection element can bear large current, has over-current and over-temperature dual protection and automatic reset functions, and is excellent in anti-impact performance and compact in structure.

The invention provides a miniature breaker with a novel current detection assembly. The miniature breaker with a novel current detection assembly includes a breaker main body and a novel current detection assembly, wherein the novel current detection assembly includes a Hall magnetic field sensor, a current detection wire, and a Hall magnetic field sensor detection circuit board; a detection Hallmagnetic field sensor in the Hall magnetic field sensor without a magnetic core is used to detect a magnetic field which is generated from the current detection wire, and an environment Hall magneticfield sensor in the Hall magnetic field sensor is used to detect a background magnetic field in the environment; and the difference values detected by the detection Hall magnetic field sensor and theenvironment Hall magnetic field sensor are processed to obtain the magnitude of the current, so as to eliminate the interference of the background magnetic field and enable the detected current to bemore accurate. Therefore, the breaker with the novel current detection assembly can accurately perform opening and closing.

The invention discloses a dual redundant drive type self-adaptive double-speed circuit breaker, and relates to the technical field of circuit breakers. Comprising a main body, a locking assembly is arranged on one side of a connecting piece, a cleaning assembly is arranged at the top of a second bevel gear, and a moving assembly is arranged in a cleaning plate, a lead screw rotates to drive a sliding column to move, then a base is driven to move synchronously, and the base moves to drive a positioning column to move into the connecting piece; the sliding column drives the lock catch to rotate through an inclined plane arranged on the sliding column, the lock catch and the protruding position of the connecting piece are in a locking state after the lock catch rotates, the position of the touch panel in a disengaged state is locked, and potential safety hazards caused by the fact that the touch panel makes contact with the contact again after a worker mistakenly touches the handle are prevented. And after the inclined surface of the sliding column is separated from the lock catch, the lock catch is driven to rotate through the first spring, so that the locking of the connecting piece is released.

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 invention relates to the technical field of circuit breakers, in particular to a fast breaking circuit breaker which comprises a shell and a contact assembly arranged in the shell, the contact assembly comprises a movable contact arranged in a rotating mode and a fixed contact arranged in a fixed mode, and a movable contact driving arm is further arranged in the shell in a rotating mode. The moving contact driving arm is used for driving the moving contact to rotate until the moving contact is disconnected with the static contact, an electromagnetic tripping assembly is further arranged in the shell, the electromagnetic tripping assembly comprises a driving piece and a transmission piece arranged in a rotating mode, and the transmission piece is used for abutting against the moving contact driving arm to limit rotation of the moving contact driving arm. And the driving piece is used for generating magnetic force and enabling the transmission piece to rotate until the transmission piece is separated from the moving contact driving arm. Through the innovative design of the electromagnetic tripping assembly, rapid breaking of the circuit breaker is realized.

The invention relates to a metering box with a junction box, and relates to the technical field of metering boxes, the metering box comprises a box body and a box door installed on the box body, and the inner wall of the box body is fixedly provided with a substrate for installing a circuit breaker; a fixing shell and a wiring block are arranged in the box body, one side of the fixing shell is detachably installed on the inner wall of the substrate, and a fixing notch for the wiring block to be installed in is formed in the side face, away from the substrate, of the fixing shell; one side of the wiring block is fixedly provided with a conducting strip connected with a binding post on the circuit breaker, and one side, far away from the conducting strip, of the wiring block is provided with a plurality of wiring holes for connecting and fixing cables; the plurality of cables can be pre-installed in the corresponding wiring holes and are electrically connected with the conductive sheets. In the application, during subsequent installation, only the wiring block provided with the cable needs to be integrally installed in the fixing gap of the fixing shell, and then the conducting strip on the wiring block is connected with the wiring terminal of the circuit breaker.

Embodiments of the present disclosure provide a surge protector and a surge protection apparatus. The surge protector comprises: a housing comprising a line pin and a ground pin; a surge protection component accommodated in the housing and coupled to the ground pin, wherein the surge protection component has a width less than a height and a length to form a flat shape; and a tripping assembly, comprising: a fuse component arranged in the housing and entirely located at one side of the surge protection component in the height direction; and a separate component coupled between the fuse component and the surge protection component via an elastic component and adapted to be moved to a tripping position when the solder is melted.

A slide-in clamping device for removably connecting a first electrical terminal of a withdrawable low-voltage circuit breaker to a corresponding second electrical terminal of a respective stationary base in a withdrawable low-voltage circuit breaker unit includes at least one pair of first clamping fingers facing each other and at least partially laterally delimiting a first clamping seat for one of said first and second electrical terminals; at least one pair of second clamping fingers facing each other and at least partially laterally delimiting a second clamping seat for the other of said first and second electrical terminals; and bias elastic mechanism acting on said at least one pair of first clamping fingers and said at least one pair of second clamping fingers.

The circuit breaker comprises a shell, an operating mechanism and a bimetallic strip, the operating mechanism comprises a draw bar shaft, a jump pin, a lock catch, a draw bar and a draw bar spring, the draw bar spring is used for driving the lock catch to rotate in the hasp fit direction with the jump pin, the draw bar comprises a rotating part, a triggering part and a re-buckling part, and the triggering part and the re-buckling part are integrally formed with the rotating part. The draw bar shaft is sleeved with the draw bar through the rotating hole, the draw bar can rotate around the draw bar shaft and slide in the axial direction of the draw bar shaft, and the draw bar directly locks the lock catch through the re-buckling part; and the thermal adjusting knob is used for adjusting the distance between the touch piece and the triggering part of the traction rod by adjusting the displacement of the traction rod in the axial direction of the traction rod shaft. According to the circuit breaker, the draw bar for directly locking the lock catch is unlocked by the bimetallic strip, the draw bar shaft serves as a rotating shaft and a sliding guide shaft of the draw bar, the thermal adjusting knob directly adjusts the position of the draw bar to realize a thermal adjustable function, and the draw bar integrates the thermal adjustable function and the re-buckling and tripping functions.

A terminal cover to cover a terminal to which an electric wire is to be connected, the terminal cover includes: an outer frame having an outer frame notch; and an inner frame provided within the outer frame notch in the outer frame, the inner frame having an inner frame notch smaller than the outer frame notch. Further, the outer frame and the inner frame are formed thinner than a peripheral portion and are connected to each other with cutoff portions that are bendable, twistable, or cuttable with a cutting tool, and the terminal is viewed through the inner frame notch.

The utility model discloses a leakage protector for parallel electricity meters, which belongs to the technical field of leakage protectors and comprises a leakage protector body, mounting plates are fixedly mounted on two sides of the leakage protector body, and binding posts are arranged at the top and the bottom of the leakage protector body. The leakage protector further comprises a protection shell, the protection shell is arranged on the outer side of the leakage protector body, the protection shell comprises a bottom box and a cover plate, and an opening is formed in one side of the bottom box; according to the leakage protector, the protection shell is arranged, so that the leakage protector is simple in structure, convenient to use and practical, good waterproof protection can be provided for the leakage protector, influence of water and air with high humidity on normal work of the leakage protector is prevented, the adaptability of the leakage protector to a humid environment is improved, and the service life of the leakage protector is prolonged; the waterproof performance of the joint of the incoming and outgoing wire and the protective shell is improved, and the waterproof performance of the device is further improved.

The invention discloses overload protection equipment for a self-open circuit type charging pile, and relates to the related field of charging piles, the overload protection equipment comprises a charging pile cabinet body, the rear side of the charging pile cabinet body is installed at the horizontal plane position through a supporting seat, and heat dissipation openings are formed in the left and right side walls of the charging pile cabinet body; and a mounting plate is mounted in the middle of the interior of the charging pile cabinet body, a swing mechanism is further arranged on the outer side of the top of the driving cam part in an attached mode, one side of the swing mechanism acts on the side face of an air injection mechanism, and the air injection mechanism is mounted at the position above an electric appliance element in the charging pile cabinet body. According to the overload protection equipment for the self-open-circuit type charging pile, the temperature of the control module is monitored in real time through the temperature sensor, a cam part is rapidly linked and driven during overload, a movable plate and a contact block of the open circuit mechanism are driven to move, an elastic normally-touch switch is accurately triggered by means of a trapezoidal contact groove, air injection and heat dissipation are conducted on electrical components in a targeted mode, and the overload protection effect is improved. The influence of heat accumulation on elements is reduced, and the use safety and the service life of the charging pile are remarkably improved.

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 utility model relates to the technical field of power distribution control contacts, and discloses a power distribution control contact convenient for fixing wire ends, which comprises a contact body and a plurality of wiring grooves arranged on the contact body, a plurality of through grooves matched with the wiring grooves are arranged at the top and the bottom of the contact body, and the lower end of the inner wall of each through groove is slidably connected with a moving block. The top of the moving block is fixedly connected with a sliding rod, the upper end of the sliding rod extends out of the contact body and is in sliding connection with the contact body, and the outer wall of the sliding rod is sleeved with a first spring. According to the power distribution control contact convenient for fixing the wire end, the sliding rod is pressed downwards forcibly to enable the moving block to move downwards, and after the moving block moves downwards to abut against a wire, the sliding rod can be well limited and fixed through the limiting assembly, so that the power distribution control contact has the advantages that people can install and fix the wire end more conveniently, and the service life of the wire end is prolonged. And the connection between the electric wire and the electric contact is firmer, so that the stability of the electric contact is higher during use.

The present invention provides a low-voltage circuit breaker, which belongs to the technical field of circuit breakers. The invention includes a circuit breaker body, wiring terminals and guide rails, and also includes: a limit clamping assembly, a blocking assembly, and a clamping assembly; by pulling a pull rod and pressing a dial rod, the wiring terminals and the movable clamp can be quickly unlocked to achieve rapid replacement of the circuit breaker, and during the wiring process, the internal circuit of the circuit breaker is in a disconnected state; the protective frame formed by the sliding block and the fixed baffle, and the expansion and contraction of the airbag, together fix and seal the wiring terminals, reduce the influence of external factors such as water vapor and dust on the wiring port, and prevent staff from accidentally touching it, further enhancing the safety of operation; the clamping assembly can better match wiring terminals of different specifications through the expansion and contraction of the airbag and the compression and release of the spring, ensure the stability of the wiring terminals, and effectively reduce the risk of poor electrical connection or damage caused by shaking of the wiring terminals.