518results about "Circuit-breaking switch contacts" patented technology

The invention discloses a dynamic closed-loop management method for bridge-shaped contact performance, and relates to the technical field of power system protection. The method comprises the following steps: S1, a dynamic sensing process: acquiring multi-source dynamic parameters of a bridge-shaped contact in a non-intrusive mode; s2, a quantitative evaluation process: fusing the multi-source dynamic parameters and the static parameters, and calculating a health index or a health level of the contact through a preset model; s3, adaptively optimizing the process, dynamically adjusting the closing energy or protection parameters of the circuit breaker according to the health state, and compensating the performance change of the contact; and S4, a predictive maintenance process: performing trend extrapolation based on the historical data of the health index, predicting the residual life and generating a maintenance suggestion. The processes are sequentially connected and cyclically iterated to form dynamic closed-loop management, so that the problems of one-sided parameter sensing, inaccurate evaluation, fixed parameters and maintenance lag in the prior art are solved, the operation reliability of the bridge-shaped contact is improved, the service life of equipment is prolonged, and the operation and maintenance cost is reduced.

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 utility model relates to the field of low-voltage electric appliances, in particular to a power supply control mechanism, which comprises a reset button, a tripping rod, a tripper, a control module and a switch contact system. When the reset button is at the hasp position or the release position, the switch contact system is switched on or switched off; a switch moving contact mechanism of the switch contact system comprises a contact support, a switch moving contact and a switch moving contact spring; in the process that the reset button moves to the hasp position, the switch moving contact mechanism is firstly driven to move to enable the switch moving contact to be in initial contact with the switch static contact, and then the contact support and the switch moving contact are driven to move relatively to enable the switch moving contact spring to store energy; in the process that the reset button moves to the tripping position, the switch moving contact spring releases energy to enable the switch moving contact and the contact support to recover limiting fit; according to the power supply control mechanism, the current-carrying capability and the arc-resistant capability of the switch contact system are good.

The utility model relates to the technical field of circuit breaker structures, in particular to a rotating shaft structure of a double-breakpoint molded case circuit breaker, which is characterized in that a rotating shaft main body is of an integral structure design, a contact groove is formed in the rotating shaft main body along the radial direction, the middle part of a moving contact is inserted into the contact groove, and two ends of the moving contact penetrate out along an opening of the contact groove; the static spring shaft and the moving spring shaft are used for being in butt joint with the static contact, the static spring shaft and the moving spring shaft are located on the two sides of the moving contact respectively, the two ends of the contact spring are connected to the static spring shaft and the moving spring shaft respectively, and the moving spring shaft is pulled through elastic tension of the contact spring so that the two sides of the moving contact can abut against the inner side wall of the contact groove respectively. Due to the integral structure design of the rotating shaft main body, the three-phase synchronism of the molded case circuit breaker is consistent, the limit breaking capacity and the operation breaking capacity of the circuit breaker are greatly improved, the safety and the reliability of the circuit breaker in operation are improved, and the electrical life of the circuit breaker is prolonged.

The utility model relates to the field of low-voltage electric appliances, in particular to a power supply control mechanism, a reset button of the power supply control mechanism is in hasp fit with a tripping rod and in transmission fit with a tripper, a control module is electrically connected with the tripper through a connecting circuit, and a switch contact system is connected in series in the connecting circuit; when the reset button is at the hasp position / tripping position, the switch contact system is switched on / off; in the switch contact system, a switch moving contact mechanism is linked with a reset button, and a switch static contact is provided with a first position and a second position. In the process that the reset button moves to the hasp position, the switch moving contact mechanism is firstly driven to move to make initial contact with the switch static contact located at the first position, and then the switch static contact is driven to move to the second position through the switch moving contact mechanism. When the reset button moves to the tripping position, the switch static contact is reset to the first position; according to the power supply control mechanism, the current-carrying capability and the arc-resistant capability of the switch contact system are good.

A circuit breaker relates to the technical field of low-voltage electrical appliances and comprises a shell, a handle, an operating mechanism and a contact mechanism, the shell is provided with a first rotating shaft and a second rotating shaft, the operating mechanism is mounted on the first rotating shaft and comprises a mechanism seat, a jump fastener and a lock fastener, the contact mechanism comprises a moving contact and a static contact, the moving contact is mounted on the second rotating shaft, and the static contact is mounted on the second rotating shaft. The handle and the jump fastener are connected through a first connecting rod. The jump fastener and the moving contact are connected through a second connecting rod. During normal switching-on or switching-off operation, the locking fastener is buckled with the tripping fastener, and the handle is driven to drive the mechanism seat to rotate around the first rotating shaft through the first connecting rod, so that the moving contact is driven to be close to or far away from the static contact through the tripping fastener and the second connecting rod; when a fault is tripped, the locking piece and the tripping piece are tripped, and the moving contact is driven to rotate around the second rotating shaft so as to be far away from the static contact. According to the circuit breaker, the operating mechanism and the moving contact are respectively arranged on different rotating shafts, and the motion decoupling of the operating mechanism and the moving contact is realized during fault tripping, so that the moving contact can be quickly broken.

A closing device and a circuit breaker relate to the low-voltage electrical field. The invention provides a closing device, which comprises a handle and a contact assembly, and is characterized in that the contact assembly comprises a static contact group and a moving contact group which can be in contact with or separated from the static contact group, and the moving contact group is in transmission connection with the handle; the handle comprises a body and a quick-closing piece rotationally arranged in the body; and the driving handle rotates to drive the moving contact group to move towards the static contact group, and the quick closing piece can be in contact with the moving contact group, so that the moving contact group stores energy to realize quick closing. According to the switching-on device, rapid switching-on of the contact assembly can be realized through the processes of energy storage and energy release, so that abrasion to the contact is reduced, and the switching-on reliability of the contact and the performance of the circuit breaker are improved.

The invention discloses a magnetic rotation arc extinguishing circuit breaker contact structure, and belongs to the technical field of high-voltage electric connectors. Comprising an arc extinguishing device, a connecting device and a circuit breaker contact, the arc extinguishing device can be connected with the circuit breaker contact through the connecting device, the arc extinguishing device is integrally of a cylindrical structure, a longitudinal magnetic field is generated when current flows through the arc extinguishing device, and when an arc passes through the middle area of the arc extinguishing device, the arc is effectively stretched and rapidly extinguished under the action of the magnetic field. The connecting device comprises a centering piece and a fixing assembly, the centering piece can fix the arc extinguishing device on the axis of the centering piece, and the fixing assembly can fix the arc extinguishing device. Through the arc extinguishing assembly, a longitudinal magnetic field is formed when current passes through the arc extinguishing assembly, and the arc rotates and stretches along a spiral path under the action of magnetic field force, so that the arc extinguishing efficiency of the circuit breaker is remarkably improved, and the problem that the magnetic field direction is inconsistent with the arc flowing direction in the prior art is solved.

An electrical insulation structure of a molded case circuit breaker comprises a connecting rod assembly (1), the connecting rod assembly (1) can drive a rotating shaft (3) to rotate under the driving of an operating handle assembly (2), a moving contact (4) is arranged on the rotating shaft (3), and the electrical insulation structure is characterized in that the surface of the moving contact (4) is coated with an insulating part (5) for increasing the creepage distance between the moving contact (4) and a metal part of the connecting rod assembly (1) of the circuit breaker. According to the electrical insulation structure, the creepage distance between the moving contact of the conductive piece and the metal piece of the lower connecting rod of the mechanism piece is increased through the installation of the upper insulating piece and the lower insulating piece on the moving contact, so that the safety performance of the circuit breaker is improved.

The invention relates to the technical field of low-voltage electric appliances, in particular to an arc extinguishing system and a switch. The arc extinguishing system provided by the invention comprises a moving contact assembly, a static contact assembly, an arc extinguishing chamber assembly, an insulating part, a bottom plate, a first sliding block and a second sliding block, the moving contact assembly comprises a moving main contact and a moving arc contact, an avoiding opening is formed in the insulating part, the moving arc contact penetrates through the avoiding opening, an inserting groove is formed in the bottom plate, the first sliding block is inserted into the inserting groove, the second sliding block is located in the avoiding opening and is in transmission connection with the moving arc contact, and the first sliding block is in sliding connection with the second sliding block; in the opening process of the moving contact assembly, the first sliding block moves in the direction of retreating from the slot, and the first sliding block and the second sliding block jointly block the receding opening. In the switching-on process of the moving contact assembly, the first sliding block moves in the direction of being inserted into the slot. The occupied space of the arc extinguishing system in the thickness direction is smaller, and the space utilization rate is higher.

The utility model discloses a residual current operated circuit breaker, which comprises a circuit breaker shell and a rotating shaft, and the rotating shaft is rotatably connected with the circuit breaker shell. At least one mounting groove is formed in the rotating shaft, a moving contact and a contact torsion spring are arranged in each mounting groove, and one end of each contact torsion spring abuts against the corresponding moving contact; wherein the mounting groove is provided with an abutting wall and two side walls, and the two side walls are arranged on the two sides of the abutting wall respectively; abutting structures are arranged on the two side walls, and each abutting structure is provided with a first gear and a second gear; the other end of the contact torsion spring abuts against one of the abutting wall, the first gear and the second gear. The deformation quantity of the contact torsion spring when the contact torsion spring abuts against the abutting wall is smaller than the deformation quantity of the contact torsion spring when the contact torsion spring abuts against the first gear, and the deformation quantity of the contact torsion spring when the contact torsion spring abuts against the first gear is smaller than the deformation quantity of the contact torsion spring when the contact torsion spring abuts against the second gear. The pressure adjusting device has the advantage of being adjustable in pressure.

The utility model discloses a residual current operated circuit breaker, which relates to the technical field of circuit breakers and comprises a shell and a contact box assembled in the shell, a wire outlet end static contact and a wire inlet end static contact are respectively assembled on two sides of the contact box, the wire outlet end static contact comprises a connecting part, an extending part and a mounting part, and the connecting part is connected with the extending part. Wherein the mounting part is integrally of a U-shaped structure, a cavity matched with the U-shaped mounting part is formed in the contact box, the extension part is located between the connecting part and the mounting part, the extension part, the connecting part and the mounting part are integrally formed through extrusion, the extension part is additionally arranged to connect the connecting part and the mounting part, and the extension part, the connecting part and the mounting part are integrally formed through extrusion, so that the length of the wire outlet end static contact is effectively increased; and large current can pass through.

The utility model provides a moving contact system and a circuit breaker comprising the same. The moving contact system comprises a plurality of contact fingers which are arranged in parallel; the contact supporting piece comprises a supporting plate and a pair of supporting arms arranged on the two sides of the supporting plate, and the first ends of the plurality of contact fingers are pivotally installed between the pair of supporting arms; the plurality of springs are arranged corresponding to the plurality of contact fingers and are positioned between the plurality of contact fingers and the supporting plate of the contact supporting piece; and the insulating grating comprises a connecting part which is arranged between the contact finger and the spring. According to the moving contact system, the insulating grating is arranged between the contact finger and the corresponding spring, so that the spring can provide larger contact pressure for overcoming electro-dynamic repulsive force during short-time tolerance, the tolerance performance is improved, meanwhile, the insulating grating and the contact finger can keep synchronous movement, friction force is reduced in the switching-on / switching-off process, and the service life of the moving contact system is prolonged. And the mechanical performance of the circuit breaker is improved.

The application relates to the technical field of switch equipment, in particular to an arc-extinguishing chamber with a flow guide structure and a circuit breaker. The arc-extinguishing chamber with the flow guide structure comprises a contact seat, a static support and a flow guide cylinder, the contact seat is provided with an axial flow hole, the static support is a tubular structure with an open end, is sleeved on the contact seat through the open end, the flow guide cylinder is arranged in the static support along an axial direction, the flow guide cylinder and the static support surround an annular flow guide channel, a through hole is formed in the outer wall of the static support, a gas baffle is fixedly installed on the outer wall of the static support and corresponds to the through hole, and the gas baffle is provided with a gas discharge hole. The arc-extinguishing chamber with the flow guide structure can prolong the discharge path of the hot airflow and reduce the flow speed, can effectively prevent a large amount of foreign matters such as metal particles and dust carried in the hot airflow from being discharged, avoids threatening the ground or interphase insulation at the tail of the airflow channel, and improves the insulation reliability.

The invention discloses a switching device. The switching device comprises a shell assembly; the contact assembly is arranged in the shell assembly; the arc extinguishing assembly and the contact assembly are arranged in the shell assembly in the first direction, the arc extinguishing assembly comprises a plurality of arc extinguishing grid pieces which are arranged at intervals in the second direction, and the arc extinguishing grid pieces comprise a plurality of first grid pieces and a plurality of second grid pieces; the plurality of first grid sheets are arranged opposite to the contact assembly and protrude out of the plurality of second grid sheets in the direction towards the contact assembly; the overcurrent protection assembly comprises a magnetic protection assembly and a metal protection assembly which are different in overload current level, and the magnetic protection assembly and the metal protection assembly are arranged on the two sides, protruding out of the multiple second grid pieces, of the multiple first grid pieces in the second direction respectively and arranged between the contact assembly and the multiple second grid pieces so as to be movably matched with the contact assembly; wherein the first direction is intersected with the second direction. According to the switching device, the over-current protection effect and the breaking effect can be ensured at the same time in a limited space range.

This application provides an arc-blocking device and a circuit breaker, belonging to the field of electrical equipment technology. In this arc-blocking device, one end of an elastic element is connected to the circuit breaker housing, and the other end is connected to an arc-blocking element, which is located on the movement trajectory of the circuit breaker's moving contact. When the moving and stationary contacts of the circuit breaker are in contact, the arc-blocking element is located on the side of the moving contact facing away from the stationary contact. During the separation process of the moving and stationary contacts, the moving contact pushes against the first side of the arc-blocking element, causing the arc-blocking element to drive the elastic element to bend and deform in the first direction until the moving contact slips off from the first side. Then, under the elastic force of the elastic element, the arc-blocking element moves in the second direction to between the moving and stationary contacts, thereby forcibly cutting off the arc generated when the moving and stationary contacts separate. It has good breaking capacity and can effectively improve the arc-extinguishing capability of the circuit breaker. Furthermore, the arc-blocking device provided in this embodiment has a simple structure, is easy to assemble, operates reliably, and has a certain degree of universality.

An operating mechanism for a circuit breaker includes: a first base plate, a second base plate, a first linkage mechanism, and a second linkage mechanism. The first and second linkage mechanisms each include a first link, a second link, and a third link. One end of the first and third links is pivotally connected to the corresponding base plate at a first hinge point and a third hinge point, respectively. One end of the second link is hinged to the free end of the third link, and the other end is hinged to the middle of the first link at a second hinge point. The first link includes a first hole provided on its free end. An output shaft extends through the first hole of the first link of the first and second linkage mechanisms. The first and / or second linkage mechanism further includes a fourth link. One end of the fourth link is pivotally connected to the first hinge point, and the fourth link is hinged at the middle of the second hinge point. The fourth link has a second hole on its free end, and the output shaft extends through the second hole.

A pull-up circuit for circuit breaker contacts is disclosed. The pull-up circuit of the present disclosure is configured to, under the control of a microcontroller, inject a current into a contact of a circuit breaker to remove the oxidation therefrom (which may cause undesired resistance to current flow). The microcontroller may also perform a measurement to determine current flow through the contact. The activation of the pull-up circuit by the microcontroller may be performed periodically to limit the build-up of oxidation on the contact of the fuse, with each activation lasting for a predetermined time period.

The invention relates to the field of low-voltage circuit breakers, and discloses a low-voltage circuit breaker with a closed cavity, which comprises a circuit breaker main body, an accommodating space is formed in the circuit breaker main body, an opening and closing operation structure is mounted in the accommodating space, two ends of the circuit breaker main body are respectively provided with a wire inlet end and a wire outlet end, and a plurality of arc extinguishing cavities are formed at one end, close to the wire outlet end, of the circuit breaker main body; a static contact set and a moving contact set are arranged in the arc extinguishing cavity, a first penetrating opening is formed between the arc extinguishing cavity and the containing space, a top sealing component is movably arranged on the first penetrating opening, and the bottom of the moving contact set is connected with a bottom sealing component. According to the invention, the top sealing component and the bottom sealing component are arranged between the arc extinguishing cavity and the accommodating space, so that the arc extinguishing cavity and the accommodating space are isolated from each other, the relatively closed arc extinguishing space is formed, the air pressure in the closed arc extinguishing space is higher, the arc is more favorably pushed into the arc extinguishing grid, the arc extinguishing time is shortened, and the arc is promoted to fully extend; and the arc extinguishing performance is improved.

The invention provides a circuit breaker and an uninterruptible power supply. The circuit breaker comprises a first busbar, a second busbar, a main contact and a plurality of arc contacts, the arc contact comprises an arc moving contact and an arc static contact. When the arc moving contact is in contact with the arc static contact, the plurality of arc contacts are connected in series through the conductive piece, the arc contact located at the head end of the plurality of arc contacts connected in series is connected with the first busbar, and the arc contact located at the tail end of the plurality of arc contacts connected in series is connected with the second busbar. When the arc moving contact is in contact with the arc static contact, the multiple arc contacts are connected in series through the conductive pieces, so that the arc contacts can generate multiple sections of series-connected arcs at the breaking moment, the sum of the voltages of the multiple sections of arcs is far higher than the system power supply voltage after the voltages of the multiple sections of arcs are superposed, the arcing duration can be shortened through the high voltage difference, and the fault can be rapidly cut off. Meanwhile, arc energy is dispersed to a plurality of fractures, heat concentration is avoided, and permanent damage to the arc contact and the internal structure of the circuit breaker caused by high-temperature arc ablation can be prevented.

The utility model belongs to the technical field of circuit breakers, and particularly discloses an operating mechanism of a molded case circuit breaker, which comprises a moving contact, a rotating shaft, a lower connecting rod, a connecting rod shaft, an upper connecting rod, a main spring and a closing lever, and is characterized in that the rotating shaft is rotatably mounted on a mechanism side plate, one end of the lower connecting rod is connected with the rotating shaft, and the other end of the lower connecting rod is mounted on the connecting rod shaft; one end of the upper connecting rod is connected with the connecting rod shaft, and the other end of the upper connecting rod is installed on the jump pin assembly. One end of the main spring is connected with the connecting rod shaft, the other end of the main spring is fixedly connected with the closing lever, and the closing lever is installed on the mechanism side plate. According to the utility model, a novel operating mechanism is designed, the operating mechanism is applied to the molded case circuit breaker, the AC / DC universal requirement is met, the modularized horizontal mechanism with a miniaturized characteristic is provided, and the adaptive circuit breaker can have more space for insulation design; the whole structure is installed on the mechanism side plate, the space utilization rate is improved, and the rotating shaft is installed on the mechanism side plate, so that positioning of the rotating shaft is facilitated.

The utility model discloses a kind of moulded case circuit breaker conducting systems, including base, multiple contact cavities are formed by multiple arrangement settings baffle in the base, multiple rotating cavities are opened in the base middle part in contact cavity opposite position, movable contact assembly is rotatably connected in the rotating cavity, static contact assembly that is installed in contact cavity is cooperated with movable contact assembly and realizes on-off, connection position is opened in the base surface front end, the static contact assembly includes static contact, first arc-extinguishing chamber and fixed baffle, one end of the static contact is set in contact cavity, the other end of the static contact extends to connection position, first arc-extinguishing chamber is installed below static contact, fixed baffle is arranged in first arc-extinguishing chamber opposite position on the surface of static contact upper side, and the bottom of fixed baffle is contacted with the outer wall of first arc-extinguishing chamber. By setting two arc-extinguishing chamber arrangement and positioning, the breaking capacity, safety reliability and service life of moulded case circuit breaker are significantly improved.

The invention relates to the technical field of circuit breakers, and discloses a grounding type circuit breaker, the circuit breaker comprises a moving contact, a static contact, a handle, a cover body and an output end, a grounding part and a first connecting piece are arranged in the circuit breaker, one end of the first connecting piece is connected with the moving contact, and after the moving contact is separated from the static contact in the opening process, the grounding part is connected with the first connecting piece. And the moving contact drives the first connecting piece to extrude the grounding part, so that the grounding part is contacted with the output end to be grounded. According to the grounding type circuit breaker, in the operation process of the circuit breaker, the moving contact is connected with the output end, then when the moving contact is subjected to opening operation, the grounding power rod and the grounding force transmission rod are used for controlling the grounding component to complete grounding, safety when a switch is switched off is guaranteed, it is guaranteed that no current exists in a circuit after the switch is switched off, and when the switch is switched on, the grounding component is not damaged. The grounding reset lever is firstly toggled, so that the grounding reset pinch bar pushes the grounding force transmission rod, and the grounding function of the circuit breaker is relieved.

The utility model provides a moving contact assembly and switch equipment, and relates to the technical field of low-voltage electric appliances. The moving contact assembly is applied to the switch equipment. The moving contact assembly comprises a moving contact body, a mounting rack and a line bank. The mounting rack is fixedly mounted on a shell of the switch equipment, and the moving contact body is movably connected with the mounting rack. The line bank is fixedly connected with the mounting rack, and the line bank and the mounting rack are matched to form a non-zero included angle. According to the moving contact assembly provided by the embodiment of the invention, the heat dissipation efficiency of the line bank can be improved, the temperature rise of the moving contact assembly in the use process is reduced, and the use performance of the switch equipment is ensured.

The invention provides a static contact of an electric switch, which at least comprises a conductive connecting piece, a contact point and a conductive body, the contact point is welded on the conductive body or the conductive connecting piece, the conductive body and the conductive connecting piece are arranged in a split or integrated manner, and the contact point is welded on the conductive body or the conductive connecting piece based on the total volume of the conductive body. The volume ratio of the conductor made of the iron material in the conductor is 30%-100%, or the material of the conductor at least contains more than 30% of the iron material in volume ratio. The invention also provides an electromagnetic release comprising the static contact. The invention relates to a static contact of an electric switch, which is applied to the electric switch, because an electric conductor containing an iron material is arranged in a main loop, part of arc energy is consumed on the iron material when the electric switch is switched off by utilizing the positive temperature coefficient characteristic of the iron material, so that the current limiting coefficient of the electric switch is reduced; the current limiting performance of the electrical switch can be improved.

The invention relates to an arc extinguishing structure for a circuit breaker and the circuit breaker. The arc extinguishing structure for the circuit breaker comprises an arc extinguishing chamber (10) and a shell (20). The arc extinguish chamber (10) comprises a plurality of arc extinguish pieces (11) which are separated from one another, and is provided with a front end close to the arc generation area and a rear end far away from the arc generation area. The shell (20) is provided with an inner cavity for containing the arc chamber (10). Wherein the inner cavity comprises a backflow area (21) and an open area (22), the backflow area (21) is closer to a static contact of the circuit breaker than the open area (22), the backflow area (21) is not communicated with the outside of the inner cavity of the shell (20), and the open area (22) is communicated to the outside of the inner cavity of the shell (20) through an exhaust channel.

The invention provides an arc extinguishing system. The arc extinguishing system comprises a first arc extinguishing group, a second arc extinguishing group, a third arc extinguishing group, a first end tab, a second end tab, an insulating shell, a contact group, a conducting piece and an end cover. The contact piece group is opposite to the conduction piece. And the three arc extinguishing groups are arranged in the insulating shell and are arranged behind the contact group together. And the first run-on plate is tightly attached to the conduction piece and is arranged below the first arc extinguishing group. And the second run-on plate is arranged above the third arc extinguishing group. A contact plate is arranged at one end, facing the contact group, of the second run-on plate. Magnetism increasing plates are arranged on the two sides of the contact plate, and a local magnetism increasing area is defined by the magnetism increasing plates and the contact plate. The arc extinguishing group is matched with the long contact piece of the contact group to form an arc striking structure, and when the circuit breaker is switched off, a local magnetism increasing area is constructed at the stopping position of the long contact piece of the contact group, so that the electromagnetic driving force of an arc entering the arc extinguishing group is improved. Meanwhile, staggered main cutting areas and side cutting areas are arranged in the arc extinguishing groups, group-by-group, batch and partition cutting of the arc and the cutting blades is achieved, the arc cutting difficulty is lowered, and the arc extinguishing capacity of the contact arc extinguishing system is improved.

A circuit breaker for an electric current, said device comprising a movable member (2) provided with an electrical conductor (4), said device being configured to move said movable member (2) between a first position, referred to as armed, allowing current to flow in the conductor (4), and a second position, referred to as disarmed, interrupting said current flow, said device further comprising an actuator (12), configured to trigger a transition of the movable member (2) from the armed position to the disarmed position in the event of a fault on an electrical circuit in which said device is integrated, said device further comprising a reset member (36) having a manual actuation zone (38), configured to move the movable member (2) from the disarmed position to the armed position, thereby also triggering a reset of the actuator (12), said actuation zone (38) forming a visual indicator of a disarmed state of said device.

The invention discloses an operating mechanism and a circuit breaker, the operating mechanism comprises a handle, a contact support and a moving contact, the handle is rotatably installed on a base, a connecting rod is also arranged between the handle and the contact, the moving contact is installed on the contact support, a first spring is also arranged between the contact support and the moving contact, and a second spring is also arranged between the contact support and the moving contact. The moving contact is under the action of the spring force of the first spring, and the moving contact is always in contact with the contact support without external force. The circuit breaker further comprises a lock catch, the lock catch is installed on the contact support, a second spring is further installed on the lock catch, the connecting rod makes contact with the lock catch and the contact support through the spring acting force of the second spring, and the lock catch is used for achieving the functions of instantaneous tripping, overload tripping and circuit breaker linkage. Compared with the prior art, the mechanism combines a plurality of parts into one part, the reliability of the circuit breaker is reduced by reducing the parts, the manufacturing cost of part molds is reduced, and the assembly efficiency of the circuit breaker is improved.

A switch belongs to the technical field of low-voltage apparatuses. Comprising a main shaft, a shell and a contact system, the contact system is arranged in the shell, the main shaft is rotationally arranged on the outer side of the shell, a swing piece is installed on the main shaft, the swing piece is in linkage with a moving contact of the contact system through hinge joint, and the contact system is arranged in the shell. At least one of the pendulous reeds is provided with an impact end, and when the main shaft rotates to a switching-off in-place position, the impact end impacts the housing to prevent the main shaft from continuously rotating along the switching-off direction. The utility model has the advantages that the impact end is arranged on the swing sheet of the main shaft connected with the moving contact, the number of parts is reduced, and the structure is simplified.