73results about How to "Improve breaking capacity" patented technology

The utility model relates to the field of circuit protection, in particular to a contactor integrated with an excitation function, and an excitation ignition assembly, a first piston, a first conductive part, an auxiliary contact system, a push rod, a melt, an air passage, a second piston and an elastic part are integrated in the contactor. The melt and the auxiliary contact system are connected in series and then are connected in series between the two static contacts. In a normal working state, the auxiliary contact system is insulated and disconnected, when an overload current, a short-circuit current or an abnormal condition occurs, the ignition assembly is excited to act to drive the first piston and the first conductive piece to move, the first conductive piece enables the auxiliary contact system to be conducted and closed, and the melt is connected into a main loop in a parallel connection mode; and then the second piston and the elastic piece are driven to displace through the air passage, so that the contact system is switched off, the elastic piece generates irreversible deformation, and the first piston and the first conductive piece push the push rod to disconnect the melt. According to the invention, the power loss is low, zero-current cut-off of a main loop can be realized, and the breaking capacity and the breaking reliability are improved.

The utility model relates to the field of circuit protection, in particular to an excitation integrated contactor with high breaking capacity, which comprises a driving system and a contact system, and further comprises an integrated excitation source, an excitation action assembly and an elastic piece, the elastic piece is arranged for one moving contact, one end of the elastic piece is fixed, the other end of the elastic piece is a free end, the excitation action assembly is fixedly connected with the free end of the elastic piece, the excitation source drives the excitation action assembly to move, the contact system is forcibly opened, and meanwhile, the elastic piece generates elastic deformation capable of restoring to the initial position; and the elastic piece, the moving contact and the excitation action assembly are all reset to initial positions during normal opening. The contactor has normal functions of the contactor and also has large current breaking and resetting functions, so that normal use of the contactor is ensured while the breaking range of the contactor is widened.

The invention relates to an operating mechanism of a dual-power automatic change-over switch, which comprises a shell and an automatic change-over assembly, and is characterized in that the automatic change-over assembly comprises a mechanism frame, a motor, a change-over disc, a change-over shaft, a first rotating frame, a first change-over pull plate, two first energy storage springs, a second rotating frame, a second change-over pull plate, two second energy storage springs and a change-over driving part; a driving part is arranged on the side, facing the first rotating frame, of the conversion driving part in a linkage mode, a shifting shaft matched with the driving part is arranged at one end of the first rotating frame, a shifting groove matched with the shifting shaft is formed in the driving part, and one end of the shifting shaft moves along with the first rotating frame and moves in the shifting groove in a reciprocating mode. And linkage matching between the driving piece and the first rotating frame is formed. The circuit breaker has the advantages of simple structure, stable and reliable performance, rapid and reliable conversion and high breaking capacity.

The bidirectional fast circuit breaker comprises a through-flow branch, a commutation module, a current limiting module, a buffer branch and an energy consumption branch, the through-flow branch comprises a fast mechanical switch FMS, a coupling inductor L2, a power electronic switch S1 and a power electronic switch S2, the fast mechanical switch FMS and the coupling inductor L2 are connected in series, and the power electronic switch S1 and the power electronic switch S2 are reversely connected in series. A diode D1 and a diode D2 are respectively connected in parallel with a power electronic switch S1 and a power electronic switch S2, a capacitor C0 is connected in series with the power electronic switch S2, a resistor R0 is connected in parallel with the capacitor C0, a current-limiting inductor L1 is connected in series with a coupling inductor L2, a thyristor T1 and a thyristor T2 are reversely connected in parallel and then are connected in series with a resistor R so as to be connected in parallel with the two ends of the current-limiting inductor L1, and a buffer branch is connected in parallel with the two ends of a through-current branch. The buffer branch comprises a resistor R1 and a capacitor C1 which are connected in series, and the energy consumption branch is connected to the two ends of the through-current branch in parallel.

The invention relates to the field of electric vehicles and other electric power control, in particular to an excitation fuse with an active and passive integrated protection function, which comprises an excitation source, a passive control power supply circuit, an excitation action piece, a conductive piece and a magnetic trigger device in mechanical linkage with a switch arranged in series in the passive control power supply circuit, the magnetic triggering device is arranged on a magnetic field loop generated when the conductive piece is electrified; the switch in the normal working state is in a normally open state; the excitation source can receive a trigger signal sent by the passive control power supply circuit or sent by the outside of the excitation fuse; when the current of the conductive piece exceeds a threshold value, the magnetic trigger device drives the switch to be closed, and the excitation source receives a trigger signal sent by the passive control power supply circuit to act; and the excitation action piece is driven to disconnect the conductive loop of the conductive piece. The protection is more reliable, the protection range is large, the action time is short, the loop resistance is low, the temperature rise power consumption performance is good, the size is small, and the structure is simple and reliable.

The invention relates to the technical field of electromagnetic release structure optimization, and discloses an electromagnetic release optimization method based on a whale algorithm, and the method comprises the steps: solving an optimal structure parameter through the whale algorithm, taking a position with the maximum counterforce as a design point, and taking the maximum electromagnetic suction value of the point as an optimization target, according to the national standard requirement, the condition that tripping is not carried out when the test current is equal to 80% of the short circuit setting current serves as the constraint condition, and mathematical modeling is carried out on the relation between the structure parameters and the electromagnetic attraction through SPSS analysis software. And then the whale algorithm and the optimization result of the orthogonal test are compared and analyzed, so that the rapid breaking of the electromagnetic release is better realized, and the short-circuit protection reliability of the electromagnetic release is improved.

The invention relates to the technical field of low-voltage apparatus switches, and particularly discloses an arc extinguishing structure and a circuit breaker, and the arc extinguishing structure comprises an arc extinguishing grid sheet group and a magnetic arc extinguishing assembly which are matched with a contact assembly. The arc extinguishing grid sheet group and the magnetic arc extinguishing assembly are arranged along a motion path of the moving contact, the magnetic arc extinguishing assembly is used for applying an acting force to an electric arc at the contact assembly, and the direction of the acting force intersects with a motion plane of the moving contact in the contact assembly. According to the invention, the arc extinguishing capability of the contact assembly can be enhanced without increasing the volume of the arc extinguishing chamber, so that the breaking capability of the direct current switch to direct current high voltage is effectively improved.

The utility model relates to a dual-power automatic change-over switch, which comprises an automatic change-over mechanism and a contact system, and is characterized in that the automatic change-over mechanism comprises a shell, a motor and a change-over assembly linked with the motor; the conversion assembly comprises a conversion shaft, a driving disc, a limiting elastic piece, a rotating shaft, a manual operation rotating disc, an energy storage torsional spring arranged between the manual operation rotating disc and the driving disc, an indicating rotating disc rotationally arranged on the conversion shaft, and an indicating piece arranged on the shell in a sliding mode and matched with the indicating rotating disc. The manual operation rotating disc is provided with two driving arms matched with the limiting elastic piece, the two ends of the limiting elastic piece are provided with two bending limiting parts matched with the two driving arms, the driving arms act along with the manual operation shaft disc and abut against the bending limiting parts, and limiting matching of the driving arms and the bending limiting parts is formed. The utility model has the advantages of simple structure, stable and reliable performance, rapid and reliable conversion and high breaking capacity.

The present invention discloses a residual current operated circuit breaker, belonging to the technical field of low-voltage electrical appliances. The residual current operated circuit breaker includes an electric leakage tripping pole module, and an L-pole circuit breaker module and an N-pole circuit breaker module disposed on both sides of the electric leakage tripping pole module, wherein the L-pole circuit breaker module includes an L-pole moving contact mechanism; the N-pole circuit breaker module includes an N-pole moving contact mechanism; the electric leakage tripping pole module includes an electric leakage jump buckle, an electric leakage lock buckle, a resetting member, a rocker arm, an assembling shaft and a tripping device; the rocker arm abuts against the resetting member; the assembling shaft is in linkage with the L-pole moving contact mechanism and the N-pole moving contact mechanism; the rocker arm is connected to one side of the electric leakage lock buckle; at least one of the rocker arm and the electric leakage lock buckle can abut against the assembling shaft; and when the electric leakage jump buckle is separated from the electric leakage lock buckle, the resetting member drives the rocker arm to rotate, so that at least one of the rocker arm and the electric leakage lock buckle pushes the assembling shaft. The L-pole circuit breaker module and the N-pole circuit breaker module are disconnected at the same time, and thus the disconnection capacity is improved.

The vacuum contact comprises a static end contact and a moving end contact, the static end contact comprises a first transverse magnetic assembly and a first longitudinal magnetic assembly, the first transverse magnetic assembly comprises a first spiral arm contact piece and a first conducting rod, the first longitudinal magnetic assembly is of a hollow structure, and the first longitudinal magnetic assembly is arranged on the peripheral side of the first conducting rod in a sleeving mode; the first radial arm contact blade is fixed at one end of the first conducting rod and is in contact with the first longitudinal magnetic assembly; the moving end contact comprises a second transverse magnetic assembly and a second longitudinal magnetic assembly, the second transverse magnetic assembly comprises a second radial arm contact blade and a second conducting rod, the second radial arm contact blade is fixed at one end of the second conducting rod and is arranged opposite to the first radial arm contact blade, and the second longitudinal magnetic assembly is of a hollow structure and is fixed on the first radial arm contact blade. The second longitudinal magnetic assembly sleeves the peripheral side of the second conductive rod. The advantages of the two magnetic fields are combined to control movement and diffusion of the vacuum arc, and the breaking capacity of the vacuum contact is improved from the aspect of mechanism.

This utility model relates to a double-acting arc-extinguishing chamber based on ball screw transmission, including a housing, a moving contact and a stationary contact disposed within the housing, a ball screw rotatably disposed within the housing, a first fixed block fixedly connected to the moving contact, and a second fixed block fixedly connected to the stationary contact. One end of the ball screw is connected to a drive device. The ball screw has a first threaded section and a second threaded section with opposite directions of rotation. The first fixed block is threadedly connected to the first threaded section, and the second fixed block is threadedly connected to the second threaded section. A first guide rail is fixedly disposed on the housing, slidingly engaging with the first fixed block, and a second guide rail is slidably engaged with the second fixed block. This utility model, through ball screw transmission, converts rotational motion into linear motion of the first and second fixed blocks, realizing the opposite or opposite movements of the moving and stationary contacts, improving the closing and opening speeds of the arc-extinguishing chamber, shortening the breaking time, and effectively improving the breaking capacity of the circuit breaker.

The utility model belongs to the field of electrical technology, and particularly relates to a contact assembly and a circuit breaker, and the contact assembly comprises a moving contact which is provided with a moving contact, and the moving contact is located at one end of the moving contact; the static contact is provided with at least two static contact points, the at least two static contact points are sequentially arranged at one end of the static contact at intervals, and the static contact points and the movable contact points are arranged oppositely; wherein the moving contact can move towards the side close to or away from the static contact, so that the moving contact is in contact with the at least two static contacts. Contact resistance can be reduced, the heating phenomenon can be reduced, local energy accumulation can be avoided, and therefore the service life of the circuit breaker is prolonged, and the breaking capacity of the circuit breaker is improved.

An auxiliary arc extinguishing structure for an excitation fuse includes an upper shell and a lower shell, and a conductive plate arranged between the upper shell and the lower shell; an electronic ignition explosion device and a piston are arranged from top to bottom in the accommodating cavity of the upper shell; an accommodating cavity for the conductive plate to fall after being disconnected is arranged on the lower shell; it is characterized in that an auxiliary arc extinguishing device is arranged on the piston, the conductive plate or the bottom of the accommodating cavity of the lower shell alone or at least two parts at the same time. The auxiliary arc extinguishing structure can improve the breaking capacity of the excitation fuse and improve the working reliability.

The utility model relates to the technical field of low-voltage comprehensive distribution boxes, and discloses a novel state grid standard low-voltage comprehensive distribution box, which comprises a plug-in intelligent compensation capacitor and an outgoing line loop busbar, and is characterized in that the plug-in intelligent compensation capacitor is arranged on the left side inside the comprehensive distribution box; the right side of the plug-in intelligent compensation capacitor is provided with a wire inlet copper busbar, and the right lower side of the wire inlet copper busbar is provided with a power supply metering transformer. The novel state grid standard low-voltage comprehensive distribution box is high in breaking capacity, good in dynamic and thermal stability, strong in practicability, novel in structure, high in protection level and the like, can be used as an updating product of a low-voltage complete set of switch equipment, and is widely applied to power consumers such as power plants, substations, industrial enterprises and the like. The device is used for electric energy conversion, distribution and control of power, illumination and power distribution equipment in a power distribution system with rated current of 800A.

The application provides a circuit breaker, and relates to the technical field of low-voltage electrical apparatuses. The circuit breaker comprises a contact mechanism, an arc discharge structure and an outgoing line plate. The arc discharge structure is provided with an arc discharge channel, the arc discharge channel is communicated with an external space of the circuit breaker, and at least part of the contact mechanism is installed in the arc discharge channel. The outgoing line plate is arranged in a spaced manner with the arc discharge structure, and the outgoing line plate is electrically connected with the contact mechanism through a flexible connection. The side of the arc discharge structure close to the flexible connection is provided with a clearance slot. According to the circuit breaker provided by the application, the breaking performance of the circuit breaker can be improved, and the use reliability of the circuit breaker can be ensured.

A contact mechanism and a switch electrical appliance, the contact mechanism includes a Y-shaped moving contact, and a static contact composed of a first static contact and a second static contact; the moving contact includes two moving contact contact arms and a moving contact connecting arm, the first static contact is a U-shaped structure capable of reversing the current, including a first static contact plate for cooperating with the moving contact, and a first static connecting plate connected to the first static contact plate; the two moving contact contact arms respectively cooperate with the first static contact plate and the second static contact of the first static contact, so that when closed, the direction of the current flowing through the first static contact plate is opposite to the direction of the current flowing through a moving contact contact arm cooperating with the first static contact plate, and the direction of the current flowing through the second static contact is opposite to the direction of the current flowing through another moving contact contact arm cooperating with the second static contact, the double breakpoint structure improves the breaking capacity, and accelerates the breaking speed by means of the mutual repulsion between the moving and static contacts, the switch electrical appliance includes the contact mechanism of the present invention.

The double-break vacuum circuit breaker comprises a tank body assembly, a transmission case, a first vacuum arc-extinguishing chamber, a second vacuum arc-extinguishing chamber, an adjusting assembly and a hard connecting piece, the tank body assembly is provided with a containing cavity, the transmission case is contained in the containing cavity, and the transmission case is provided with a first conductive seat and a second conductive seat which are oppositely arranged in the left-right direction; the first vacuum arc-extinguishing chamber and the second vacuum arc-extinguishing chamber are both arranged in the transmission case, the first vacuum arc-extinguishing chamber is provided with a first movable end and a first static end, the first movable end penetrates through the first conductive seat, the second vacuum arc-extinguishing chamber is provided with a second movable end and a second static end, the second movable end penetrates through the second conductive seat, and the second static end penetrates through the second conductive seat. The adjusting assembly is used for enabling the first vacuum arc-extinguishing chamber and the second vacuum arc-extinguishing chamber to move left and right relative to the transmission case so as to adjust the distance between the first static end and the second static end, the two ends of the hard connecting piece are connected with the first conductive base and the second conductive base respectively, the breaking capacity can be improved, and the high-voltage-grade and large-current working conditions can be used.

The utility model discloses an exhaust structure of an alternating current circuit breaker, which relates to the field of circuit breakers and comprises a shell and an arc extinguish chamber, the shell comprises a middle cover, a left cover and a right cover, the left cover and the right cover are mounted on two sides of the middle cover, and the middle cover is provided with a plurality of first gas guide plates for guiding gas from the arc extinguish chamber to the left side and the right side. The middle cover and the left cover are matched to form a first exhaust channel, the middle cover and the right cover are matched to form a second exhaust channel, a third exhaust channel and a fourth exhaust channel, and a first outlet communicated with the first channel and a second outlet communicated with the second exhaust channel and the fourth exhaust channel are formed in the bottom of the side wall of the shell. And a third outlet communicated with the third channel is formed in the upper surface of the shell. The utility model has the advantages of space saving and good safety.

The invention provides a circuit breaker. The circuit breaker at least comprises an insulating shell and an internal element, the internal elements at least comprise an operating handle, a connecting rod, a moving contact support, a moving contact, a static contact, an arc extinguish chamber, a tripping device and a fault protection device, the moving contact support is at least provided with the moving contact and the tripping device, and the moving contact support is arranged in the middle of the insulating shell in a manner of rotating or longitudinally moving along a Y axis; at least one linkage connecting rod is arranged between the operating handle and the tripping device on the moving contact support, and the linkage connecting rod is arranged in a longitudinal movement mode. According to the circuit breaker, the operating handle is located at the top of the circuit breaker, the opening and closing distance of the moving contact is large, and the tripping device is arranged on the moving contact support, so that the opening and closing speed is high, and the breaking capacity and the safety of the circuit breaker are improved.

This invention discloses a novel liquid nitrogen switch with adjustable opening distance, comprising a housing, and further comprising: a permanent magnet operating mechanism on the outside of the housing sidewall; a main shaft rotatably connected to the permanent magnet operating mechanism; a trip spring arm fixedly connected to the main shaft; a trip spring connected at one end to the trip spring arm; a vertically arranged channel steel; a positioning block fixed to the side of the channel steel; an insulating pull rod fixedly connected to the main shaft; two protrusions opposite each other at the lower end of the insulating pull rod; two annular vertical plates on the moving contact rod, with the protrusions abutting between the two annular vertical plates; a copper-tungsten alloy electrode disposed at the front end of the moving contact rod; and a stationary conductive element disposed opposite to the copper-tungsten alloy electrode. This invention uses a permanent magnet operating mechanism as the operating mechanism, and limits the range of motion of the main shaft by changing the size of the positioning block to achieve an adjustable switch opening distance. A high-pressure glass observation window is also provided to meet the need for observing the liquid nitrogen arc in experiments.

The utility model relates to a lower isolation environment-friendly semi-solid-sealed switch, which realizes high integration of switch equipment by integrating a circuit breaker assembly, a static contact assembly, a moving contact assembly and the like on a mechanism frame, and is characterized in that a vacuum arc-extinguishing chamber is arranged in each semi-solid-sealed polar pole, so that the generation and diffusion of electric arcs can be effectively inhibited in a vacuum environment, and the reliability of the switch equipment is improved. The breaking capacity and the arc extinguishing speed of the switch are improved, the cam transmission assemblies are driven through the rotating motion of the main shaft, then the opening and closing operation of the vacuum arc extinguishing chamber is achieved, mutual interference between the cam transmission assemblies is effectively prevented through the arrangement of the interphase check rings, and the sealing performance of the vacuum arc extinguishing chamber is enhanced through the fixed sealing plug. According to the utility model, external impurities and moisture are prevented from invading, so that the service life of the switch is prolonged, the conductive clamp ensures good connection between the vacuum arc-extinguishing chamber and an external circuit, and the conductive performance and the electrical stability of the switch are improved.

The utility model relates to the technical field of low-voltage electric appliances, in particular to an arc extinguishing system and a circuit breaker. The arc extinguishing system comprises a contact structure and an arc extinguishing chamber. The contact structure comprises a static contact and a moving contact group. The moving contact group comprises a plurality of arc contact pieces and a plurality of main contact pieces which are arranged side by side. The arc extinguish chamber and the moving contact group are arranged oppositely; the arc extinguish chamber is provided with an arc extinguish cavity, one end of the arc extinguish cavity close to the moving contact group is provided with an air inlet channel, and the opening area of the air inlet channel is reduced along the direction far away from the moving contact group; and the movable end of each arc contact piece passes through the inlet of the air inlet channel and extends into the air inlet channel. According to the arc extinguishing system provided by the invention, the structure of the arc extinguishing chamber is improved, so that the speed of the arc going deep into the arc extinguishing chamber can be improved on the basis of not increasing the volume of the arc extinguishing chamber, the breaking capacity of the arc extinguishing system is further improved, and meanwhile, the arc extinguishing system has the advantages of small volume, compact structure and the like.

The invention relates to a self-charging current-limiting type alternating current solid-state circuit breaker, which belongs to the technical field of circuit breakers and comprises a forced commutation branch, a current limiting branch, a current limiting branch, a current limiting branch, a current limiting branch and a current limiting branch, and is characterized in that the forced commutation branch is used for injecting reverse current into the current through branch or the current limiting branch when a short-circuit fault occurs; the energy consumption branch circuit is used for consuming the current when the current of the through-current branch circuit or the current limiting branch circuit is reduced to a safe turn-off range; and the self-charging branch is used for charging the capacitor in the forced commutation branch. According to the self-charging current-limiting type AC solid-state circuit breaker provided by the invention, when a short-circuit fault occurs, the forced commutation branch can inject a reverse current into the through-current branch or the current-limiting branch, and when the current of the through-current branch or the current-limiting branch is reduced to a safe turn-off range, the current of the energy-consuming branch is consumed, so that the cut-off process of the short-circuit fault is completed; the short-circuit turn-off capability of the solid-state switch can be improved, the number of semiconductor devices connected in parallel is reduced, and the cost of the solid-state circuit breaker is reduced while the turn-off capacity is improved.

The application relates to the field of low-voltage electrical apparatuses, in particular to an arc extinguishing device, wherein a front moving contact and a front static contact are oppositely matched along a direction d1, a rear moving contact and a rear static contact are oppositely matched along the direction d1, a front arc extinguishing chamber and a rear arc extinguishing chamber are arranged side by side and at intervals along a direction d2, and a conductive cross beam is connected in series between the front static contact and the rear static contact and extends along the direction d1; in a direction d3, the conductive cross beam and an arc inlet end of the front arc extinguishing chamber form a front contact area for closing and opening a front moving contact point of the front moving contact and a front static contact point in the front static contact, the conductive cross beam and an arc inlet end of the rear arc extinguishing chamber form a rear contact area for closing and opening a rear moving contact point of the rear moving contact and a rear static contact point in the rear static contact, and the front contact area and the rear contact area are arranged side by side and at intervals along the direction d2; the direction d1, the direction d2 and the direction d2 are perpendicular to each other; and the arc extinguishing device has high arc extinguishing efficiency and effect.

The application relates to the technical field of fuses, in particular to a patch type three-terminal fuse with high breaking capacity. The three-terminal fuse comprises a three-terminal fuse main body and a FUSE; the three-terminal fuse main body comprises a main circuit, a fusible alloy in series on the main circuit and a heating element; the heating element is close to the fusible alloy; wherein the position of the heating element is arranged to make the heat of the heating element conduct to both ends of the fusible alloy, and at least two first fusible parts and second fusible parts which are synchronously triggered to fuse are formed on the fusible alloy; wherein the FUSE is in parallel with the fusible alloy. The scheme provides a patch type three-terminal fuse with high breaking capacity, so as to solve the problems that the traditional three-terminal fuse is insufficient in breaking capacity under a high-voltage scene, is easy to produce electric arc and cannot be flexibly adapted to voltage.

The application discloses a kind of high surface natural micropore structure regulation-based high surface withstand voltage polyimide and preparation method and application thereof, belong to high voltage insulating material technical field, after drying diamine is dissolved in solvent A, then add dianhydride, after stirring uniformly, obtain polyamide acid solution;Add pore forming agent again, high-speed stirring is uniformly dispersed, obtain mixed viscous solution C;After coating, drying, imidization high temperature heating, and natural cooling, immerse in liquid B and extract pore forming agent, after drying, obtain high surface natural micropore structure regulation-based high surface withstand voltage polyimide.The polyimide surface has natural pore structure, surface is along the surface of electric field, and the through-hole structure is densely distributed along the surface of electric field, and the electron is easy to drop into the through-hole structure in the jumping multiplication process when flashover, and it is difficult to return to the surface, so that the secondary electron multiplication process is inhibited, the probability of forming secondary electron avalanche is reduced, so as to realize the improvement of surface withstand voltage.

The utility model discloses an arc extinguishing magnetic latching relay comprising a housing comprising a pedestal and an upper cover covering the pedestal, and the pedestal is provided with a spacing groove; the magnetic circuit driving part comprises a coil, an iron core, a yoke, an armature, a rotating frame and a pushing frame; the contact part comprises a movable spring module and a static spring module, the static spring module comprises a static spring sheet and a static contact arranged on the static spring sheet, the movable spring module comprises a movable spring sheet and a movable contact arranged on the movable spring sheet, and the movable spring sheet is connected to the pushing frame and can be driven by the pushing frame to drive the movable contact and the static contact to be closed or separated. A clamping groove is formed in the side, facing the base, of the static reed. And the magnetic piece is clamped in the clamping groove and is inserted into the limiting groove. According to the relay capable of extinguishing the arc, the magnetic piece is clamped in the clamping groove of the static reed and the limiting groove of the base, installation of the magnetic piece is facilitated, the arc extinguishing effect can be achieved through arrangement of the magnetic piece, and the service life of the relay is prolonged.

The present invention relates to a bipolar longitudinal magnetic contact structure and a vacuum arc extinguishing chamber. The bipolar longitudinal magnetic contact structure includes: a static contact assembly, the static contact assembly includes a static conductive rod, a static contact piece, and a static side U-shaped iron core; a moving contact assembly, the moving contact assembly includes a moving conductive rod, a moving contact piece, and a moving side U-shaped iron core; and also includes: a moving side iron core support, which is fixedly connected to the moving side U-shaped iron core and is used to fix the moving side U-shaped iron core to the moving end of the vacuum arc extinguishing chamber; the moving contact piece of the moving contact assembly is arranged separately from the moving side U-shaped iron core, and the moving contact piece can realize opening and closing under the drive of the moving conductive rod. The above scheme can solve the problem of excessive concentration of local arcs when the contact spacing is small during the opening process of the existing bipolar longitudinal magnetic contact structure.

The application discloses a kind of intelligent magnetic control low-voltage switch device, including magnetic control primary module and blade type secondary module;The magnetic control primary module includes first bottom shell, first top shell, plastic shell baffle, bottom plate, the first bottom shell, first top shell, plastic shell baffle, bottom plate form entire shell frame;The application can realize automatic opening and closing under the size requirement of original manual plastic shell circuit breaker, directly replace the existing old switch of station area, the opening and closing speed is greatly changed fast, improve mechanical performance, effectively increase the space capacity of secondary control module, realize high intelligence, one, secondary integral modular design, secondary module heat insulation design, secondary control module can be plugged, can realize not power replacement secondary module, improve the operation and maintenance ability of product, the service life of primary and secondary module is same period, greatly improve the service life of device, secondary vulnerable components can be plugged alone, improve the flexibility of device, with higher scientificity, logic.

The invention provides a circuit breaker which at least comprises an insulating shell and internal elements, and the internal elements at least comprise an arc striking piece, a static contact, a moving contact, an operating mechanism, a connecting conductor and at least one U-shaped or U-shaped magnet yoke. The connecting conductor is electrically connected with the moving contact, the U-shaped or U-shaped magnet yoke is arranged on the connecting conductor in a sleeving manner, the opening direction of the U-shaped or U-shaped magnet yoke faces towards a magnetic conduction piece or / and an arc striking piece on the moving contact, and the arc striking piece or / and the magnetic conduction piece is / are subjected to the magnetic field action of the U-shaped or U-shaped magnet yoke. Therefore, the residence time of the arc between the moving contact and the static contact is shortened, the opening speed of the moving contact is accelerated, the current limiting capability is enhanced, and the capability of breaking short-circuit fault current is improved.